HK1122591A

HK1122591A - Sealing tape and fiber product making use of the same

Info

Publication number: HK1122591A
Application number: HK08113569.6A
Authority: HK
Inventors: 定藤浩树; 秋守纯一
Original assignee: 日本奥亚特克斯股份有限公司
Priority date: 2005-09-20
Filing date: 2006-09-20
Publication date: 2009-05-22

Description

Joint filling belt and fiber product using the same

Technical Field

The present invention relates to a seam-filling tape and a textile product such as a clothing product, a sheet, a tent, a sleeping bag, etc., using the seam-filling tape.

Background

Fiber products such as clothing, sheets, tents, bags, and sleeping bags used for applications requiring water repellency, dust repellency, wind resistance, and the like are generally of a 2-layer structure in which a woven fabric, a knitted fabric, or other fabric is laminated as a facing material on a protective lining (water-proof coating or water-proof film), or a laminated fabric in which a warp knitted fabric is laminated on the other face (lining) of the protective lining.

In the waterproof laminated fabric having a 2-layer structure, the lining material, which is the side in contact with the skin, is a waterproof film made of a urethane resin or the like, and the feeling to the skin is poor when the fabric is wetted with water or sweaty. Therefore, when a waterproof laminated fabric having a 2-layer structure is used, a lining material such as a mesh knitted fabric or a taffeta fabric is generally used in a stacked state. However, this method has the following problems: since the lining material sticks to the skin, the feeling of the skin is poor, and since an air layer (a space formed by the waterproof laminated fabric and the lining material) between the skin and the outside air is large, not only the moisture permeability during wearing is reduced, but also the lining material is bulky and cannot be stored compactly. Therefore, in recent years, a laminated fabric having a 3-layer structure in which a warp knitted fabric is laminated has been generally used as a lining material of a waterproof film in order to reduce the skin touch and the air-impermeable feeling while pursuing lightweight property and portability of a product.

When a 3-layer waterproof laminated fabric is processed into a textile product, a caulking tape is used to perform caulking treatment on the joint portions such as seams and seams. The caulking treatment is a treatment for blocking (sealing) a gap generated at a joint portion of the fiber products with a resin, and is performed for the purpose of preventing rainwater from penetrating through a gap generated at a joint portion of the waterproof laminated fabric in the case of a raincoat which requires waterproofness, for example. The seam tape is generally formed of a 3-layer structure in which a fabric is laminated on one surface of a base film and an adhesive layer is laminated on the other surface. As the fabric laminated on the caulking tape, a warp knitted fabric having the same appearance as that of the waterproof laminated fabric having a 3-layer structure is used in order to make the lining member of the waterproof laminated fabric having a 3-layer structure conform to the appearance of the caulking tape and improve the skin touch of the caulking tape.

For example, japanese patent application laid-open No. 2002-249730 discloses a sealing tape having good adhesion and washing durability and usable for sealing clothes such as raincoats, ski shirts, and mountaineering wear, in which a cloth is laminated via an adhesive layer to a heat-resistant layer portion of a polyurethane-based resin layer formed of a heat-resistant layer portion and a hot-melt layer portion having a melting point of 120 ℃.

Japanese patent application laid-open No. 11-279903 discloses a joint tape in which a polyurethane resin is laminated with an adhesive layer on a warp knitted fabric having a number of courses per inch in the range of 40 to 60 courses using a nylon 66 fiber having a fineness of 15 to 30 denier.

Japanese patent application laid-open No. 5-508668 discloses a tape for sealing a joint by liquid permeation, which is formed of a porous polytetrafluoroethylene layer obtained by expansion-stretching and having a thermosetting adhesive applied to one side thereof and having a plurality of pores partially filled with the adhesive, and a thermoplastic hot-melt adhesive layer bonded to the one side of the porous polytetrafluoroethylene layer and having a high density on the side thereof not coated with the thermosetting adhesive, the thermoplastic hot-melt adhesive layer being bonded to the side coated with the thermosetting adhesive.

Disclosure of The Invention

As described above, the caulking tape is generally formed of a 3-layer structure in which a fabric is laminated on one surface of a base film and an adhesive layer is laminated on the other surface, and the adhesive layer is melt-impregnated into a fiber laminate by hot-pressing the caulking tape placed at a seam or a seam portion of the fiber laminate or the like, and then is solidified by cooling, whereby the fiber laminate and the caulking tape are fixed. However, for the following reasons, the fabric laminated on the base film of the seam tape has a restriction that the knitted fabric must be laminated in fact.

First, if the knitted fabric is not laminated on the base film, the impregnation of the adhesive layer laminated with the second layer of the caulking tape into the fabric laminated with the first layer of the caulking tape is reduced at the portion where the caulking tapes cross (hereinafter, also referred to as "cross portion"), and a sufficient caulking effect cannot be exerted at the cross portion.

Second, when a fiber laminate is processed into a clothing product, a lining of the clothing product is often subjected to caulking treatment, but when a knitted fabric of a fabric as a caulking tape is not provided, a base material film used for the caulking tape is exposed and directly contacts the skin, and therefore appearance and touch are deteriorated.

On the other hand, the caulking tape in which the knitted fabrics are laminated has a problem that the quality of the knitted fabrics is large. If weight reduction is to be achieved by reducing the fineness or density, the strength is insufficient, the knitted fabric is too thin, and processing for forming a calking tape cannot be performed, so that there is a limit to weight reduction. Further, the knitted fabric has the following problems: due to abrasion with shirts, buttons, velcro (ベルクロフアスナ a), etc., the yarn constituting the knitted fabric is scattered in structure, and thus the appearance is deteriorated or the abrasion is deteriorated. If the density is increased to solve these problems, the obtained caulking tape becomes heavy, and the impregnation of the adhesive layer laminated with the second layer of caulking tape at the intersection with the fabric laminated with the first layer of caulking tape is reduced, and a sufficient caulking effect cannot be obtained.

However, when the knitted fabric is laminated on a base film of the sealing tape, the number of contact points with the base film is reduced, and it is difficult to obtain sufficient adhesion to the base film. Therefore, if the textile product using the caulking tape is repeatedly washed, the knitted fabric is peeled from the edge portion of the caulking tape, and there is a problem that the appearance and the durability are deteriorated. If the thickness or amount of the adhesive for bonding the substrate film and the knitted fabric is increased to bond them, the hand becomes hard and the appearance and comfort of the product are impaired. In addition, the knitted fabric is inevitably low in modulus and tensile strength in its structure, and even if a caulking tape in which the knitted fabric is laminated is used for a joint portion of a fiber laminate to which a welding process of a seamless seam or the like is applied, a sufficient joint strength cannot be obtained.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a caulking tape which overcomes the practical restriction that a knitted fabric must be used on the surface of the caulking tape when a fiber product is obtained by sewing or welding a fiber laminate, and which has good durability, is light and thin, and has good comfort without impairing the appearance and touch.

The caulking tape of the present invention to solve the above problems has a base film laminated on the baseA woven fabric on one surface of a material film and a joint tape having an adhesive layer laminated on the other surface of the base film, characterized in that the total value of the Cover Factor (CF) of the warp and weft constituting the woven fabric is calculated by the following formula_{Total up to}) Is 500 to 1400.

CF_{Total up to}＝CF_m+CF_t

CF_m: cover factor of warp

CF_t: cover factor of weft

F_m: fineness of warp (dtex)

F_t: fineness of weft (dtex)

D_m: warp density (strips/2.54 cm)

D_t: density of weft yarns (strips/2.54 cm)

That is, the gist of the present invention is to improve the adhesion layer of the second layer of the caulking tape at the intersection of the caulking tapes by laminating the adhesive layer of the second layer of the caulking tape to the first layer of the caulking tape by using a woven fabric satisfying the above covering factor as a fabric laminated on the caulking tapeThe impregnation property of the fabric (hereinafter referred to simply as "the impregnation property at the cross portion") of (a) a textile fabric improves the water resistance of the seam filling portion (particularly, the cross portion), and improves the appearance, weight reduction and touch feeling when the textile fabric is produced into a textile product. Preferably the Cover Factor (CF) of the warp yarns_m) Or Cover Factor (CF) of weft_t) At least one of them is in the range of 200 to 800.

Preferably, at least one of the warp and weft constituting the woven fabric is constituted by 2 or more filaments. By using warp or weft yarns composed of 2 or more filaments, the touch of the obtained caulking tape becomes soft. The fineness of the filaments is preferably, for example, 12dtex or less. By setting the fineness of each 1 filament to 12dtex or less, the touch of the resulting caulking tape becomes softer.

Preferably, at least one of the warp yarns and the weft yarns constituting the woven fabric is a long fiber. This is because the use of the long fibers can suppress the fuzzing of the fabric surface and improve the impregnation at the intersection. In addition, at least one of the warp and weft constituting the fabric is preferably a processed yarn. This is because the use of the processed yarn improves the cross-over impregnation property, and the appearance and touch are not impaired even if the fiber density of the fabric is reduced.

The weave of the fabric is preferably a plain weave, for example. This is because the use of the plain weave structure makes it easy to reduce the fiber density and improves the impregnation at the intersection.

If a film having water repellency is used as the base film, for example, the water repellency of the caulking treatment portion can be improved. The film having water repellency is preferably a porous film made of a hydrophobic resin, and more preferably a porous polytetrafluoroethylene film.

The porous film made of a hydrophobic resin preferably has a hydrophilic resin layer on the side where the adhesive layer is laminated. This is because the bonding strength between the porous film made of a hydrophobic resin and the adhesive layer is improved by the hydrophilic resin layer.

The adhesive of the caulking tape is preferably a hot-melt adhesive, for example. By using a hot-melt adhesive, the caulking process can be facilitated. The hot-melt adhesive is preferably a polyurethane resin. The thickness of the adhesive layer of the caulking tape is preferably 120 μm or less, for example. This is because in either case, the resulting caulk tape becomes soft in hand.

The fiber product of the present invention is a fiber product obtained by sewing or welding a fiber laminate, wherein at least a part of a sewn portion or a welded portion is subjected to caulking treatment using the caulking tape. By using the caulking tape of the present invention, a fiber product having a good caulking effect can be obtained.

The fiber product is preferably a fiber laminate comprising a flexible film, a woven fabric laminated on one surface of the flexible film, and a fabric laminated on the other surface of the flexible film, and the total value of the Cover Factor (CF) of the warp and weft yarns constituting the woven fabric is calculated from the following formula_{Total up to}) 700 to 1400, the fabric side of the fiber laminate is subjected to caulking treatment.

CF_{Total up to}＝CF_m+CF_t

CF_m: cover factor of warp

CF_t: cover factor of weft

F_m: fineness of warp (dtex)

F_t: fineness of weft (dtex)

D_m: warp density (strips/2.54 cm)

D_t: density of weft yarns (strips/2.54 cm)

That is, since the woven fabric satisfying the value of the cover factor is excellent in impregnation of the adhesive layer of the caulking tape as in the woven fabric laminated on the caulking tape, a good caulking effect can be obtained at the joint (sewn portion and welded portion) when the fiber laminated product is processed into a fiber product. By using the fiber laminate laminated with the woven fabric, a fiber product lighter than a conventional fiber laminate laminated with a warp knitted fabric can be obtained. Preferably the Cover Factor (CF) of the warp yarns_m) Or Cover Factor (CF) of weft_t) At least one of them is in the range of 300 to 800.

The flexible film of the fiber laminate is preferably a waterproof moisture-permeable film, and more preferably a porous polytetrafluoroethylene film. By using a waterproof moisture-permeable film as the flexible film, a fibrous product having excellent waterproof moisture-permeability can be obtained. As the fiber product, for example, clothing is preferable.

The present invention can provide a seam-filling tape which is light, thin and comfortable, and has excellent durability (water resistance), while overcoming the practical restriction that a knitted fabric must be used on the surface of the seam-filling tape, and without impairing the appearance and touch. The textile product using the caulking tape of the present invention is excellent in durability (water resistance), appearance and touch, and can be made lightweight and compact.

Brief description of the drawings

Fig. 1 is an explanatory view illustrating a cross-sectional structure of the caulking tape of the present invention.

Fig. 2 is an explanatory diagram illustrating a cross-sectional structure of a caulking portion obtained by caulking a sewed portion.

Fig. 3 is an explanatory diagram illustrating a cross-sectional structure of a caulking portion obtained by caulking a welded portion.

Fig. 4 is an electron micrograph of the fabric used in the caulking tape of example 1.

Fig. 5 is an electron micrograph of the warp knit fabric used in the caulk tape of example 5.

Fig. 6 is an explanatory view illustrating a test piece having a sewn portion for testing the water resistance of a caulk portion.

Fig. 7 is an explanatory view illustrating a test piece having a welded portion for caulking water resistance test.

Best Mode for Carrying Out The Invention

(1) Seam filling belt

The joint tape of the present invention is a joint tape comprising a base film, a woven fabric laminated on one surface of the base film, and an adhesive layer laminated on the other surface of the base film, characterized in that the total value of the cover coefficients of warp and weft (CF) constituting the woven fabric is calculated by the following formula_{Total up to}) Is 500 to 1400.

CF_{Total up to}＝CF_m+CF_t

CF_m: cover factor of warp

CF_t: cover factor of weft

F_m: fineness of warp (dtex)

F_t: fineness of weft (dtex)

D_m: warp density (strips/2.54 cm)

D_t: density of weft yarns (strips/2.54 cm)

(1-1) to fabrics

First, a fabric laminated on a base film used in the present invention will be described. In the fabric used in the present invention, the total value of the Cover Factor (CF) calculated from the above expression is used for each of the warp and weft constituting the fabric_{Total up to}) At least 500, preferably at least 700, more preferably at least 900, at most 1400, preferably at most 1300, more preferably at most 1200. Here, the cover factor indicates the size of the eye of the fabric, and the larger the number, the smaller the gap between the fibers, and the smaller the number, the larger the gap between the fibers.

In the present invention, the total value of the Cover Factor (CF) calculated from the above formula is used for each of the warp and weft constituting the fabric_{Total up to}) Above 500 is for the purpose of ensuring the strength and improvement of the fabric usedWhile maintaining desirable minimum appearance and feel while being rational and processable. On the other hand, in order to ensure the cross-impregnation property, the fabric used in the present invention needs to have eyes large to some extent. Therefore, the total value of the coverage coefficients calculated by the above expression is preferably 1400 or less.

Ideally the warp yarn Coverage Factor (CF)_m) Or Cover Factor (CF) of weft_t) At least one of them is 200 or more, preferably 300 or more, and 800 or less, preferably 700 or less. This is because, by setting the cover factor of at least one of the warp and weft yarns within the above range, the strength of the fabric to be used and the handleability when laminating the fabric are ensured, and the cross-over impregnation property and the like are improved. In addition, as can be seen from the above formula, the cover factor of the warp and weft can be controlled by appropriately selecting the fineness and the density.

The fineness of the warp and weft constituting the fabric is preferably 5dtex or more, preferably 7dtex or more, and 55dtex or less, preferably 33dtex or less. When the fineness is 5dtex or more, the physical strength of the woven fabric and the obtained joint tape can be secured, and the abrasion resistance of a practical level can be exhibited. Further, by setting the fineness to 55dtex or less, the thickness of the woven fabric can be reduced, and the volume of the void portions existing between the yarns can be reduced, so that the impregnation property of the intersecting portions is improved. In addition, the fabric and resulting caulk tape are lightweight while having a soft hand.

Preferably, at least one of the warp and weft constituting the woven fabric is constituted by 2 or more filaments. This is because the fabric and the resulting caulking tape have soft hand feeling by using the warp or weft constituted by 2 or more filaments. Further, the fineness of each filament constituting the warp or weft is preferably 12dtex or less. By setting the fineness of each filament constituting the warp or weft to 12dtex or less, the thickness of the woven fabric can be reduced, and the volume of the void portion existing between the yarns can be reduced, so that the cross-over portion impregnation property is improved. In addition, the fabric and resulting caulk tape become softer to the touch.

The density of the warp and weft constituting the fabric may be determined as appropriate under the condition that the range of the total value of the cover factor can be satisfied.

The material of the fibers (fibers constituting the warp or weft) constituting the woven fabric used in the present invention is not particularly limited, and when a hot melt adhesive described later is used as the adhesive layer of the caulking tape, it is preferable that the heat resistance is higher than the softening point of the hot melt adhesive. In general, the softening point of the hot melt adhesive is less than about 140 ℃, and therefore, it is preferable to use a fiber having heat resistance such that the softening point is 140 ℃ or higher and the softening point is not significantly deformed at a temperature of less than 140 ℃, and it is more preferable to use a fiber having heat resistance such that the softening point is 170 ℃ or higher and the softening point is not significantly deformed at a temperature of less than 170 ℃.

The fibers may be either natural fibers or synthetic fibers. Examples of the natural fibers include plant fibers such as cotton and hemp, and animal fibers such as silk, wool, and other animal hair. Examples of the synthetic fibers include polyamide fibers, polyester fibers, and acrylic fibers. Particularly when used for clothing and the like, polyamide fibers, polyester fibers and the like are preferred from the viewpoint of softness, strength, heat resistance, durability, cost, lightweight and the like.

The fibers constituting the fabric used in the present invention may be either long fibers or short fibers, but it is preferable to use long fibers or fibers substantially close to long fibers. This is because if short fibers are used, fuzz of the short fibers is likely to occur on the surface of the woven fabric of the resulting caulking tape, and the impregnation of the intersecting portions is reduced, which may result in a decrease in caulking effect. Therefore, when short fibers are used, the fuzz on the fabric surface of the obtained caulking tape is preferably treated (removed) by singeing or melting.

The type of yarn of the fiber is not particularly limited, but if the warp and weft constituting the low-density woven fabric are raw yarns in the scouring and dyeing step after the production of the raw fabric, the subsequent laminating step, and the treatment, the appearance defects due to the knitting defects are likely to occur, and the production becomes difficult. Therefore, the yarn is preferably a processed yarn, more preferably a false twist processed yarn. Further, by using the processed yarn, the cross-over impregnation property is further improved as compared with the base yarn. This is because if a processed yarn is used, the space between fibers constituting the yarn becomes large, and the adhesive of the caulking tape is easily impregnated between the fibers.

The weave of the woven fabric is not particularly limited, and may be a twill weave, a satin weave, a plain weave, or the like. Among them, a plain weave is preferable. This is because, if the weave of the woven fabric is a plain weave, the physical properties in the warp direction and the weft direction are well balanced, and the strength and abrasion resistance are good in the structure, so that the fiber density is easily reduced, and the impregnation at the intersection portion is improved.

(1-2) about a substrate film

Next, the base film used in the present invention will be described. The material of the base film is not particularly limited, and when a hot-melt adhesive described later is used as the adhesive layer of the sealing tape, the base film preferably has heat resistance higher than the softening point of the hot-melt adhesive. In general, the softening point of the hot melt adhesive is less than about 140 ℃, and therefore, it is preferable to use a heat-resistant substrate film having a softening point of 140 ℃ or higher and not significantly deformed at a temperature of less than 140 ℃, and it is more preferable to use a heat-resistant substrate film having a softening point of 170 ℃ or higher and not significantly deformed at a temperature of less than 170 ℃.

Examples of the base film include films of polyurethane resins, polyester resins such as polyethylene terephthalate and polybutylene terephthalate, acrylic resins, polyamide resins, vinyl chloride resins, synthetic rubbers, natural rubbers, silicone resins, fluorine-containing resins, and the like. The substrate film may further contain a modifying agent such as a pigment, an ultraviolet absorber, or a filler.

The thickness of the base film is preferably 5 μm or more, preferably 10 μm or more, and 300 μm or less, preferably 100 μm or less. By setting the thickness of the base material film to 5 μm or more, the handling property at the time of production is good; by setting the thickness to 300 μm or less, flexibility of the base film can be secured. The thickness of the base film was measured using a direct-reading thickness meter (measured using a 1/1000mm direct-reading thickness meter manufactured by dele corporation (テクロツク) without applying a load other than the own spring load).

As the substrate film, for example, a film having water repellency is preferably used. If a film having water repellency is used as the base material film, water repellency can be imparted to the caulked portion obtained by the caulking tape treatment. In applications such as raincoats where water repellency is particularly required for the joint, a base film having water repellency of 100cm or more, preferably 200cm or more, in terms of water resistance (water repellency) measured by the JISL 1092A method is preferably used.

Examples of the film having water repellency include a nonporous polymer film and a porous film made of a hydrophobic resin such as a fluorine-containing resin or a water-repellent treated urethane resin (hereinafter, also simply referred to as "hydrophobic porous film"). The term "hydrophobic resin" as used herein means a resin molded into a smooth and flat plate, and the contact angle of a water droplet placed on the surface of the plate is 60 degrees or more (measurement temperature 25 ℃ C.), preferably 80 degrees or more.

In the hydrophobic porous film, the hydrophobic resin constituting the film base material suppresses the permeation of water into the pores, and exhibits water repellency as a whole film. On the other hand, since the adhesive is a porous body, the adhesive penetrates into the pores of the membrane to exert an anchor effect, and thus lamination processing with good durability can be realized. Among these, the film having water repellency is preferably a porous film made of a fluororesin, more preferably a porous polytetrafluoroethylene film (hereinafter also referred to as "porous PTFE film") from the viewpoint of heat resistance and dimensional stability. In particular, since the porous PTFE film has high hydrophobicity (water repellency) of polytetrafluoroethylene, which is a resin component constituting the film base material, a film having high porosity can be produced while obtaining excellent water repellency, and thus excellent adhesion durability due to the anchor effect of the adhesive can be achieved.

The porous PTFE membrane is a membrane obtained by removing a molding aid from a molded product of a paste obtained by mixing fine powder of Polytetrafluoroethylene (PTFE) with the molding aid and then stretching the molded product at high temperature and high speed into a planar shape, and has a porous structure. That is, the porous PTFE film is composed of nodules as aggregates of primary particles of polytetrafluoroethylene connected to each other by fine crystal bands and fibrils as bundles of stretched crystal bands drawn from these primary particles, and pores are formed in spaces defined by the fibrils and the nodules connecting the fibrils. The porosity, maximum pore diameter, and the like of the porous PTFE membrane described later can be controlled by the expansion ratio and the like.

The maximum pore diameter of the hydrophobic porous membrane is preferably 0.01 μm or more, preferably 0.1 μm or more, and 10 μm or less, preferably 1 μm or less. If the maximum pore diameter is less than 0.01 μm, the production becomes difficult; conversely, if it exceeds 10 μm, the water repellency of the hydrophobic porous membrane decreases, and since the membrane strength becomes weak, handling in subsequent steps such as lamination becomes difficult easily.

The porosity of the hydrophobic porous membrane is preferably 50% or more, preferably 60% or more, and 98% or less, preferably 95% or less. When the porosity of the hydrophobic porous film is 50% or more, the anchoring effect of the adhesive is improved. On the other hand, when the content is 98% or less, the strength of the film can be ensured.

Further, the maximum pore diameter is a value measured in accordance with the specification of ASTM F-316. The porosity was calculated from the apparent density (. rho.) measured by the apparent density measurement according to JIS K6885 by the following equation.

Porosity (%) - (2.2. rho)/2.2X 100

The thickness of the hydrophobic porous membrane is preferably 5 μm or more, preferably 10 μm or more, and 300 μm or less, preferably 100 μm or less. The hydrophobic porous film has a thickness of 5 μm or more, and thus the handling property during production is good; by setting the thickness to 300 μm or less, the flexibility of the hydrophobic porous film can be ensured. The thickness of the hydrophobic porous membrane was measured using a direct-reading thickness meter (measured using a 1/1000mm direct-reading thickness meter manufactured by dele corporation (テクロツク) without applying a load other than the own spring load).

In the present invention, the hydrophobic porous film preferably has a hydrophilic resin layer on the side where the adhesive layer is laminated. By forming the hydrophilic resin layer in advance, the mechanical strength of the hydrophobic porous film is improved, and the adhesiveness to the adhesive layer is improved, so that a seam filling tape having excellent durability can be obtained. The hydrophilic resin layer may be formed on the surface of the hydrophobic porous film, and the hydrophilic resin layer may be partially impregnated in the surface layer portion of the hydrophobic porous film. Since the hydrophilic resin is partially impregnated into the pores of the surface layer of the hydrophobic porous film to exert an anchor effect, the bonding strength between the hydrophilic resin layer and the hydrophobic porous film is strong.

As the hydrophilic resin, a polymer material having hydrophilic groups such as a hydroxyl group, a carboxyl group, a sulfonic acid group, and an amino acid group, which is water-swellable and water-insoluble, is preferably used. Specifically, a hydrophilic polymer such as polyvinyl alcohol, cellulose acetate, or nitrocellulose, which is at least partially crosslinked, and a hydrophilic urethane resin may be exemplified, and a hydrophilic urethane resin is particularly preferable in view of heat resistance, chemical resistance, processability, and the like.

The hydrophilic urethane resin may be polyester-based or polyether-based polyurethane or prepolymer containing a hydrophilic group such as a hydroxyl group, an amino group, a carboxyl group, a sulfonic acid group, or an oxyethylene group, and diisocyanates, triisocyanates, or adducts thereof having 2 or more isocyanate groups may be used alone or in combination as a crosslinking agent for adjusting the melting point (softening point) of the resin. In addition, 2-or more-functional polyols such as diols and triols, and 2-or more-functional polyamines such as diamines and triamines may be used as the curing agent for the isocyanate-terminated prepolymer.

As a method for forming a hydrophilic resin layer such as a hydrophilic urethane resin on the surface of a hydrophobic porous film, a coating liquid is prepared by dissolving a urethane resin or the like in a solvent or by heating and melting the resin, and the coating liquid is applied to a hydrophobic porous film by a roll coater or the like. The viscosity of the coating liquid suitable for impregnating the hydrophilic resin into the surface layer of the hydrophobic porous film is 20000mPa · s or less, preferably 10000mPa · s or less at the coating temperature. When the solution is made into a solution using a solvent, it is preferable to maintain a viscosity of 500mPa · s or more, because if the viscosity is too low, the solution diffuses into the entire hydrophobic porous film after application, and the entire hydrophobic porous film becomes hydrophilic, and a uniform resin layer cannot be formed on the surface of the hydrophobic porous film, and there is a high possibility that a problem arises in water repellency. The viscosity can be measured, for example, by using a type B viscometer manufactured by imperial industries, Inc. (imperial ).

(1-3) adhesive layer

The adhesive layer laminated on the sealing tape of the present invention will be described below. The adhesive used for the adhesive layer is not particularly limited as long as it is an adhesive that fills the voids generated in the joint portions such as the seams and seams of the fiber product during the caulking process and exerts the caulking effect, and a hot melt adhesive that is heated and melted by hot air, ultrasonic waves, high frequency, or the like and exerts the adhesive force is preferable because the handling property during the caulking process is good. As the hot melt adhesive, various resins such as a polyethylene resin or a copolymer resin thereof, a polyamide resin, a polyester resin, a butyral resin, a polyvinyl acetate resin or a copolymer resin thereof, a cellulose derivative resin, polymethyl methacrylate, a polyvinyl ether resin, a polyurethane resin, a polycarbonate resin, and a polyvinyl chloride resin can be used singly or as a mixture of 2 or more kinds.

When the sealing tape of the present invention is used for clothing, it is required to have a soft touch in addition to durability against dry cleaning and durability against washing. In this case, the hot melt adhesive is preferably a polyurethane resin.

The flowability of the hot melt adhesive (measured at 180 ℃ by shimadzu corporation) was ideally 40 × 10^-3cm³More than s, preferably 60X 10^-3cm³200 × 10/s or more^-3cm³A value of less than s, preferably 100X 10^-3cm³The ratio of the water to the water is less than s. This is because if the flow value of the hot-melt resin is too low, the adhesive strength is insufficient, and if it is too high, the molten hot-melt adhesive melts out from the needle holes of the sewn portions or oozes out from both ends of the tape during caulking processing, and the appearance is degraded or sufficient water resistance cannot be obtained.

The thickness of the hot-melt adhesive layer is preferably 20 μm or more, preferably 50 μm or more, and 400 μm or less, preferably 200 μm or less, particularly preferably 120 μm or less. If the hot-melt adhesive layer is less than 20 μm, the amount of resin is too small to completely fill the uneven portions of the yarn in the needle hole portion, and the water repellency of the seam portion may be insufficient. Further, it is difficult to stably coat the hot-melt adhesive layer with a thickness of less than 20 μm, and a coating failure called fish eyes is likely to occur in the hot-melt adhesive layer. On the other hand, if the hot-melt adhesive layer is formed to a thickness of more than 400 μm, the time required for the caulking tape to be sufficiently melted during the hot-press bonding is long, and the productivity is lowered, or the substrate film side to be bonded may be thermally damaged. Further, if the thermocompression bonding time is shortened, the hot-melt adhesive layer is not sufficiently melted, and a sufficient caulking effect cannot be obtained. Further, the hand of the caulk portion after the bonding process is hard, and for example, when the caulking tape of the present invention is used for clothing, the caulk portion feels hard.

In addition, it is also preferable that the thickness of the hot melt adhesive layer is appropriately changed depending on the type of the raw fabric of the fiber laminate to be subjected to the caulking treatment. For example, when the raw fabric on the side of the fiber laminate on which the caulking treatment is performed is a woven fabric satisfying a coverage factor described later, the thickness of the hot melt adhesive layer of the caulking tape can be reduced, and is preferably 120 μm or less, for example. When the thickness of the hot-melt adhesive layer is 120 μm or less, a textile product having a good texture and appearance at the seam part can be obtained. Further, since the amount of resin of the hot-melt adhesive can be reduced, the effect of reducing the material cost due to the reduction in the amount of resin and the effect of improving the productivity that the adhesive melts in a short time at the time of caulking the tape to increase the speed of the caulking process can be simultaneously achieved, and the production cost of the textile product can be reduced. On the other hand, when the raw fabric on the side of the fiber laminate on which the caulking treatment is performed is a warp knitted fabric, the hot melt adhesive is required in an amount sufficient to fill the space inside the warp knitted fabric, and therefore the thickness of the hot melt adhesive layer is preferably 150 μm or more.

The seam-filling tape of the present invention has a 10% modulus in the longitudinal direction of preferably 10N/cm or more, more preferably 12N/cm or more, further preferably 50N/cm or less, more preferably 30N/cm or less. When the modulus in the longitudinal direction is within the above range, the change in the tape width before and after the caulking process is suppressed, and therefore, the caulking process can be stably performed. When the 10% modulus is less than 10N/cm, the tape is in a necked state (a state in which the tape is elongated in the longitudinal direction and has a narrow width) when the caulking treatment is performed, and therefore, in a portion where caulking is difficult, such as a curved portion, a sufficient caulking width may not be secured. Further, if the 10% modulus exceeds 50N/cm, the touch of the caulking tape becomes hard, and therefore, the part subjected to caulking processing tends to feel hard when the textile product is produced.

(2) Method for manufacturing seam filling belt

The method of producing the joint sealing tape of the present invention will be described below.

The method of producing a caulking tape of the present invention includes a first step of laminating a base material film and the above-described woven fabric to obtain a first laminate, a second step of applying an adhesive to the base material film side of the first laminate obtained in the first step to obtain a second laminate, and a step of slitting the second laminate obtained in the second step into a tape shape. The following describes specific contents of the respective steps.

(2-1) first step

In the first step, a first laminate is obtained by laminating the base film and the woven fabric. When the base film and the above-mentioned woven fabric are laminated by a method such as adhesion or fusion bonding, and the woven fabric is made of a material which is difficult to fuse, such as polyamide fiber or polyester fiber, it is preferable to bond the base film and the above-mentioned woven fabric with an adhesive.

As the adhesive, a curable resin adhesive which can be cured by a chemical reaction, a reaction with heat or light, a reaction with moisture, or the like is preferable. For example, various resin adhesives such as polyester resin, polyamide resin, polyurethane resin, silicone resin, (meth) acrylic resin, polyvinyl chloride resin, polyolefin resin, polybutadiene rubber, and other rubbers may be cited. Among them, a urethane resin adhesive can be preferably exemplified. The polyurethane resin adhesive is particularly preferably a curing reaction type hot melt adhesive.

The curing reaction type hot melt adhesive is an adhesive which is solid at normal temperature, forms a low viscosity liquid by melting by heating, and forms a high viscosity liquid or cured product by maintaining a heated state or further raising the temperature, or by bringing into contact with moisture or other polyfunctional compounds having active hydrogen to cause a curing reaction. The curing reaction may be promoted by the presence of a curing catalyst, a curing agent, or the like.

The curable reactive polyurethane resin hot-melt adhesive used for bonding the base film and the fabric is preferably a liquid having a low viscosity after melting by heating (i.e., when applied for bonding), and has a viscosity of 500 to 30000 mPas (more preferably 3000 mPas or less). The viscosity referred to herein is a value measured with a cone rotor and a set temperature of 125 ℃ by "ICI cone and plate viscometer" manufactured by RESEARCH EQUIPMENT. The curing reaction type polyurethane resin hot-melt adhesive is preferably one that can be cured by moisture (moisture).

The curing reaction type polyurethane resin hot melt adhesive can be obtained by subjecting a polyol such as polyester polyol or polyether polyol and an aliphatic or aromatic polyisocyanate such as TDI (toluene diisocyanate), MDI (diphenylmethane diisocyanate), XDI (xylylene diisocyanate), IPDI (isophorone diisocyanate) to an addition reaction under such conditions that an isocyanate group remains at the end. The obtained curable polyurethane hot-melt adhesive has an isocyanate group at the terminal, and therefore, the curing reaction occurs by moisture in the air. The melting temperature of the curing reaction type polyurethane resin hot melt adhesive is desirably higher than room temperature by more than 50 ℃, preferably 80-150 ℃.

Examples of the curing reaction type polyurethane resin hot melt adhesive include "Bondmaster" commercially available from NSC corporation of japan (japan エヌエスシ). The curing reaction type polyurethane resin hot-melt adhesive is heated to 70-150 ℃ to form a molten liquid with coatable viscosity. The melt is applied to a base film, adhered to a fabric, and then cooled to about room temperature to form a semisolid, thereby suppressing excessive permeation and diffusion of the fabric. Furthermore, a soft and strong bond can be obtained by carrying out a curing reaction with moisture in the air.

The method of applying the adhesive for bonding the base film and the fabric is not particularly limited, and a roll coating method, a spray coating method, a brush coating method, or the like can be used. In order to improve the flexibility of the laminate, it is recommended to partially apply the adhesive in the form of a film, a dot, or a line.

When the adhesive is applied in the form of a film, the thickness of the adhesive layer is preferably 5 μm or more, preferably 10 μm or more, and 100 μm or less, preferably 70 μm or less. When the thickness of the adhesive layer is less than 5 μm, sufficient adhesiveness may not be obtained; if it exceeds 100. mu.m, the hand of the resulting joint-sealing tape becomes hard. The bonding area (the area of the adhesive applied) when the adhesive is applied locally is preferably 5% or more, more preferably 40% or more, further preferably 95% or less, further preferably 90% or less of the total area of the substrate film surface. When the bonding area is less than 5%, sufficient adhesiveness may not be obtained. Further, if the bonding area exceeds 95%, the effect of improving flexibility cannot be sufficiently obtained.

The amount of the adhesive to be applied may be set in consideration of the unevenness of the fabric surface, the fiber density, the required adhesiveness, the required durability, and the like. The coating weight is preferably 1g/m²Above, preferably 4g/m²Above, 50g/m²The lower, preferably 30g/m²The following. If the amount of the adhesive applied is too small, the adhesiveness is insufficient, and durability such as durability against washing cannot be obtained. On the other hand, if the amount of the adhesive applied is too large, the hand of the resulting laminate becomes too hard, which is not preferable.

As a preferred lamination method, for example, the following methods can be mentioned: the melt of the curable reactive polyurethane resin adhesive was applied to a substrate film by a roller having a gravure pattern, and the above-mentioned woven fabric was superimposed thereon and pressure-bonded by a roller. This method ensures good adhesion, and the resulting laminate has good hand feeling and good yield.

(2-2) second step

In the second step, the adhesive is applied to the base film side of the first laminate obtained in the first step to obtain a second laminate. Here, a case where a hot-melt adhesive is used as the adhesive will be described. The form of the hot melt adhesive may be a block, a tablet, a powder, a bead, a sheet, or the like, and may be suitably used. As a method of applying the hot melt adhesive to the first laminate obtained in the first step, for example, a solvent method, a hot melt method, an extrusion method, and the like can be used, and the extrusion method is preferably used in view of quality, cost, and the like. In the extrusion method, a hot-melt adhesive is heated and melted by an extruder, and is pressure-fed to a die, and the molten hot-melt adhesive is discharged from the die onto a base film of a first laminate to coat the base film, and is cooled by a cooling roll to obtain a second laminate.

(2-3) third step

The second laminate obtained in the second step is slit into a suitable width for use as a caulking tape. The slitting process can be performed by a known method, and a slitting process using a male and female knife (slitting knife) or the like can be suitably used. The slit width is appropriately selected depending on the width required for the belt, and is preferably 5mm or more, preferably 8mm or more, and 50mm or less, preferably 25mm or less. If the width is less than 5mm, the caulking width when covering the caulking portion with the tape may be too small, and the caulking effect may be impaired. On the other hand, if the width is 50mm or more, creases and wrinkles are likely to occur, and the appearance of the product is deteriorated.

Further, since the fabric is laminated in the first step, the second laminate can be slit by applying a higher tension than when the knitted fabric is laminated. The tension here means a tension applied in the longitudinal direction of the caulking tape when the caulking tape subjected to the slitting process is wound.

In the present invention, the tension for winding the caulking tape at the time of slitting is not particularly limited, but is preferably 70 to 100N/m. By setting the tension to 70N/m or more, the second laminate is cut with a good cutting effect in the slitting process using the slitting knife, and productivity can be improved. Further, by setting the tension to 100N/m or less, the elongation in the longitudinal direction of the second laminate can be suppressed, and the necking can be prevented.

In the process of manufacturing a caulking tape using a knitted fabric as a liner, if the tension during slitting is set to 70N/m or more, the caulking tape is constricted and reduced in width, and if the tension is removed after slitting, the width of the caulking tape becomes larger than the width of the slitting blade, and unevenness occurs in the slit width. For example, if the tension is 100N/m or more, the caulking tape may be wound while being stretched in the longitudinal direction, and the wound roll may be deformed into an shape after the slitting process. On the contrary, if the tension is 40N/m or less, the slitting effect of the slitting blade is deteriorated, and the tape which is easily slit is wound around the slitting blade. As described above, the caulking tape using the warp knitted fabric as the liner has a property of being easily elongated in the longitudinal direction, and therefore, the range of the tension setting condition in the slitting process is small, and the slitting process speed is also about 15 m/min to reach the upper limit, and it is difficult to make the speed faster.

(3) Fibrous article of the present invention

The invention comprises the following fibrous products: a fiber product obtained by sewing a fiber laminate, characterized in that at least a part of a sewn portion is subjected to caulking treatment using the caulking tape of the present invention; a fiber product obtained by subjecting a fiber laminate to a welding process, wherein at least a part of a welded portion is subjected to a caulking treatment using the caulking tape of the present invention. By processing a fiber laminate into a fiber product using the caulking tape of the present invention, a fiber product having a good caulking effect can be obtained. At least a part of the sewn portion or the welded portion may be subjected to caulking treatment using the caulking tape of the present invention, and the sewn portion or the welded portion may be subjected to caulking treatment using the caulking tape of the present invention.

The fiber laminate of the fiber product of the present invention is not particularly limited, and may be, for example, a fiber laminate obtained by laminating a fabric on a flexible film.

The textile product of the present invention preferably uses a total value of Cover Factors (CF) of warp and weft constituting the woven fabric, which is calculated from the following formula and has a flexible film, a woven fabric laminated on one surface of the flexible film, and a woven fabric laminated on the other surface of the flexible film_{Total up to}) The fabric side of the fiber laminate of 700 to 1400 was subjected to caulking treatment using the caulking tape of the present invention. This is because, if a woven fabric satisfying the above coverage coefficient range is used as the woven fabric laminated on the side of the fiber laminate on which the caulking treatment is performed, the impregnation property of the adhesive of the caulking tape is good as in the woven fabric laminated on the caulking tape, and the joint (sewn portion and fused portion) at the time of processing the fiber laminate into a fiber product is goodJoint portion) can obtain a good caulking effect.

CF_{Total up to}＝CF_m+CF_t

CF_m: cover factor of warp

CF_t: cover factor of weft

F_m: fineness of warp (dtex)

F_t: fineness of weft (dtex)

D_m: warp density (strips/2.54 cm)

D_t: density of weft yarns (strips/2.54 cm)

(3-1) to fabrics

The fabric laminated in the fiber laminate preferably used in the fiber product of the present invention will be described. In the fabric, the total value of the covering Coefficient (CF) calculated by the above formula is calculated for each of the warp and weft constituting the fabric_{Total up to}) At least 700, preferably at least 800, more preferably at least 900, at most 1400, preferably at most 1300,More preferably 1200 or less. The total value (CF) of the cover factor calculated by the above formula for each of the warp and weft constituting the fabric_{Total up to}) Above 700 is to maintain the minimum required appearance and feel while ensuring the strength of the fabric used and improving handling and processability. If the total value of the coverage factors is less than 700, the physical strength (abrasion durability and the like) of the resulting fiber laminate is insufficient in practical use, and the appearance and touch are poor. The appearance of the resulting fiber laminate is determined by the appearance of the surface exposed to the outside, and if the total value of the cover factors is less than 700, the degree of penetration of the flexible film from the gaps between the fibers of the woven fabric is increased, and the quality required for the general fiber product cannot be satisfied. The feel of the resulting fiber laminate is the feel (skin feel) when a human body touches the fibrous product, and if the total value of the coverage coefficients is less than 700, a rough skin feel occurs. On the other hand, in order to ensure the impregnation of the adhesive of the caulking tape into the woven fabric, the woven fabric used in the fiber laminate needs to have a certain degree of large pores. Therefore, the total value of the coverage coefficients calculated by the above expression is preferably 1400 or less. If the total value of the cover factor is more than 1400, the adhesive of the caulking tape is insufficiently impregnated into the gaps between the fibers forming the woven fabric, and not only does the sealability of the caulking portion not be ensured, but also the feel of the resulting fiber laminate becomes hard and weight reduction becomes difficult.

It is desirable that the warp yarns of the fabric have a Cover Factor (CF)_m) Or Cover Factor (CF) of weft_t) At least one of them is 300 or more, preferably 400 or more, 800 or less, preferably 700 or less. This is because, when the cover factor of at least one of the warp and weft of the woven fabric is in the above range, the strength and handling property of the woven fabric, the impregnation property of the adhesive of the calking tape into the woven fabric, and the like are improved. In addition, as can be seen from the above formula, the cover factor of the warp and weft can be controlled by appropriately selecting the fineness and the density.

The preferred forms of the woven fabric and the fibers constituting the woven fabric used for the fiber laminate are the same as those of the woven fabric and the fibers constituting the woven fabric used for the caulking tape except for the range of the cover factor.

(3-2) about a flexible film

Hereinafter, a flexible film used for the fiber laminate will be described.

The flexible film is not particularly limited as long as it is a film having flexibility, and examples thereof include films of polyester resins such as polyurethane resins, polyethylene terephthalate and polybutylene terephthalate, polyolefin resins such as acrylic resins, polyethylene and polyolefins, polyamide resins, vinyl chloride resins, synthetic rubbers, natural rubbers, fluorine-containing resins, and the like.

The thickness of the flexible film is preferably 5 μm or more, preferably 10 μm or more, and 300 μm or less, preferably 100 μm or less. This is because, if the thickness of the flexible film is less than 5 μm, a problem arises in handling property at the time of production, and if it is more than 300 μm, flexibility of the flexible film is impaired. The thickness of the flexible film was measured using a direct-reading thickness meter (measured using a 1/1000mm direct-reading thickness meter manufactured by dele corporation (テクロツク) without applying a load other than the own spring load).

As the flexible film, a film having, for example, water resistance, wind resistance, or dust resistance is preferably used. The flexible film may be a waterproof film to impart water repellency to the obtained textile product, or a waterproof moisture-permeable film to impart water-moisture permeability to the obtained textile product. In addition, a film having water repellency or water-repellent moisture permeability generally has both wind resistance and dust resistance. In applications where water repellency is particularly required, such as raincoats, a flexible film having water repellency of 100cm or more, preferably 200cm or more, in terms of water resistance (water repellency) measured by JIS L1092A is preferably used.

In the present invention, a waterproof moisture-permeable film is used asThe flexible film is a preferred form. The waterproof moisture-permeable film refers to a flexible film having "waterproofness" and "moisture permeability". That is, the obtained fiber laminate is provided with not only the above-described "water repellency" but also "moisture permeability". For example, when the fiber laminate is processed into a clothing product, since the moisture vapor of sweat generated from the body of the wearer is diffused to the outside through the fiber laminate, the air-impermeable feeling can be prevented when the clothing product is worn. Here, the term "moisture permeability" refers to the property of permeating water vapor, and preferably has a value of 50g/m in a hygroscope measured by JIS L1099B-2 method²H or more, preferably 100g/m²Moisture permeability of h or more.

Examples of the waterproof moisture-permeable film include hydrophilic resin films such as polyurethane resins, polyester resins, silicone resins, and polyvinyl alcohol resins, and porous films (hereinafter also simply referred to as "hydrophobic porous films") formed of polyester resins, polyolefin resins such as polyethylene and polypropylene, fluorine-containing resins, and hydrophobic resins such as polyurethane resins subjected to water repellent treatment. The term "hydrophobic resin" as used herein means a resin molded into a smooth and flat plate, and the contact angle of a water droplet placed on the surface of the plate is 60 degrees or more (measurement temperature 25 ℃ C.), preferably 80 degrees or more.

The hydrophobic porous film maintains moisture permeability by a porous structure having pores (continuous pores) inside, and the hydrophobic resin constituting the film base material suppresses the intrusion of water into the pores, thereby exhibiting water repellency as a whole film. Among these, the waterproof moisture-permeable film is preferably a porous film made of a fluorine-containing resin, and more preferably a porous polytetrafluoroethylene film (hereinafter also referred to as "porous PTFE film"). In particular, in the porous PTFE film, polytetrafluoroethylene, which is a resin component constituting the film base material, has high hydrophobicity (water repellency), and thus water repellency and moisture permeability can be simultaneously achieved.

As the porous PTFE film, the same material as that used for the caulking tape can be used.

The hydrophobic porous membrane is preferably used after the inner surfaces of the pores are coated with a polymer having water repellency and oil repellency. By coating the inner surface of the pores of the hydrophobic porous film with a polymer having water repellency and oil repellency in advance, it is possible to suppress permeation or retention of various contaminants such as body fat and oil, beverages, and detergents into the pores of the hydrophobic porous film. This is because these contaminants reduce the hydrophobicity of PTFE preferably used for the hydrophobic porous membrane, and cause a loss in water resistance.

In this case, a polymer having a fluorine-containing branch may be used as the polymer. Specific descriptions of such a polymer and a method for combining the polymer with a porous membrane are disclosed in WO94/22928 and the like, and one example thereof is given below.

As the coating polymer, those represented by the following general formula (1) can be preferably used

(wherein n is an integer of 3 to 13, and R is hydrogen or methyl)

The fluorinated branched polymer is a polymer obtained by polymerizing a fluoroalkyl acrylate and/or a fluoroalkyl methacrylate (the fluoroalkyl moiety preferably has 4 to 16 carbon atoms). When the pores of the porous film are coated with the polymer, an aqueous microemulsion (average particle diameter of 0.01 to 0.5 μm) of the polymer is formed using a fluorine-containing surfactant (for example, ammonium perfluorooctanoate), and the polymer is immersed in the pores of the porous film and then heated. By this heating, the water and the fluorinated surfactant are removed, and the polymer having a fluorinated branch chain is melted to coat the inner surface of the pores of the porous membrane while maintaining continuous pores, thereby obtaining a hydrophobic porous membrane having excellent water repellency and oil repellency.

Further, as other coating polymers, "AF polymer" (trade name of dupont (デユポン)), and "CYTOP" (trade name of asahi glass co. When these polymers are coated on the inner surfaces of pores of a hydrophobic porous membrane, the polymers may be dissolved in an inert solvent such as "Fluorinert" (trade name of 3M corporation), impregnated into a porous PTFE membrane, and then the solvent may be evaporated.

In the fiber laminate used in the present invention, the hydrophobic porous film preferably has a hydrophilic resin layer on the side where the woven fabric is laminated. The form having the hydrophilic resin layer is particularly useful in the case of processing a clothing article or the like in which the fabric side of the fiber laminate used in the present invention is a lining. That is, the hydrophilic resin absorbs moisture such as sweat generated from the human body and emits the moisture to the outside, and prevents various contaminants such as body fat and oil from entering pores of the hydrophobic porous film from the human body side. This is because these contaminants reduce the hydrophobicity of PTFE preferably used for the hydrophobic porous membrane, and cause a loss in water resistance. Further, by forming the hydrophilic resin layer in advance, the mechanical strength of the hydrophobic porous film is also improved, and therefore a hydrophobic porous film having excellent durability can be obtained. The hydrophilic resin layer may be formed on the surface of the hydrophobic porous film, and preferably the hydrophilic resin is impregnated in the surface layer portion of the hydrophobic porous film. Since the hydrophilic resin is impregnated into the pores of the surface layer of the hydrophobic porous film to exert an anchor effect, a fibrous product having high adhesive strength between the hydrophilic resin layer and the hydrophobic porous film is formed. In addition, if the hydrophobic porous membrane is entirely impregnated with the hydrophilic resin in the thickness direction, the moisture permeability is reduced.

As the hydrophilic resin, a water-swellable and water-insoluble polymer material having hydrophilic groups such as hydroxyl groups, carboxyl groups, sulfonic acid groups, and amino acid groups is preferably used. Specifically, a hydrophilic polymer such as polyvinyl alcohol, cellulose acetate, or nitrocellulose, which is at least partially crosslinked, and a hydrophilic urethane resin can be exemplified, and a hydrophilic urethane resin is particularly preferable if heat resistance, chemical resistance, processability, moisture permeability, and the like are taken into consideration.

The hydrophilic urethane resin may be polyester-based or polyether-based polyurethane or prepolymer containing a hydrophilic group such as a hydroxyl group, an amino group, a carboxyl group, a sulfonic acid group, or an oxyethylene group, and diisocyanates, triisocyanates, or adducts thereof having 2 or more isocyanate groups may be used alone or in combination as a crosslinking agent for adjusting the melting point (softening point) of the resin. In addition, 2-or more-functional polyols such as diols and triols, and 2-or more-functional polyamines such as diamines and triamines may be used as the curing agent for the isocyanate-terminated prepolymer. In order to maintain high moisture permeability, 2 functions are better than 3 functions.

(3-3) cloth

The fiber laminate preferably used in the present invention is a laminate in which the above-described woven fabric is laminated on one surface of the above-described flexible film and a fabric is laminated on the other surface. This is because the physical strength and the design feeling of the fiber laminate obtained by laminating the fabric on the other surface are improved. The fabric is not particularly limited, and examples thereof include woven fabric, knitted fabric, net, nonwoven fabric, felt, synthetic leather, and natural leather. The material constituting the fabric may be natural fibers such as cotton, hemp, and animal hair, synthetic fibers, metal fibers, ceramic fibers, or the like, and may be appropriately selected according to the use of the fiber laminate. For example, when the fiber product of the present invention is used for outdoor products, a woven fabric made of polyamide fibers, polyester fibers, or the like is preferable in view of softness, strength, durability, cost, lightweight, and the like. The fabric may be subjected to conventionally known water repellency treatment, softening treatment, antistatic treatment, and the like as necessary.

The fiber laminate preferably used in the present invention is a laminate in which the above-described woven fabric is laminated on one side of a flexible film and a fabric is laminated on the other side, but any one side is not particularly limited as to which side is a fabric of a fiber product and which side is a lining. A typical embodiment includes a woven fabric laminated on one side to be subjected to caulking as a lining and a woven fabric laminated on the other side as a fabric. This is because, in particular, when the fiber product of the present invention is used for clothing products and the like, the appearance of the obtained clothing products and the like is improved by using the side subjected to the caulking treatment as a lining.

(3-4) method for producing fiber laminate and fiber product

The fiber laminate and the method for producing the fiber product preferably used in the present invention will be described.

The fiber laminate preferably used in the present invention is preferably produced by bonding a flexible film and a woven fabric or a cloth with an adhesive. As the adhesive, the same adhesive as that used for bonding the base film and the fabric in the production of the joint tape can be used. The method of applying the adhesive is not particularly limited, and a roll coating method, a spray coating method, a brush coating method, or the like is used. In order to improve the flexibility and moisture permeability of the resulting fiber laminate, it is recommended to apply the adhesive in a dot or line form. As a preferred lamination method, for example, the following methods can be mentioned: the melt of the curable polyurethane resin adhesive is applied in a dot form to a flexible film by a roller having a gravure pattern, and the woven fabric or cloth is superimposed thereon and pressure-bonded by the roller. In particular, when a coating method using a roller having a gravure pattern is used, good adhesion can be secured, and the obtained textile product has good hand feeling and moisture permeability and good yield. When the adhesive is applied in a dot or line form, the adhesive area (the area of the adhesive applied) is preferably 5% or more, more preferably 40% or more, still more preferably 95% or less, still more preferably 90% or less of the total area of the flexible film surface. When the bonding area is less than 5%, sufficient adhesiveness may not be obtained. Further, if the bonding area exceeds 95%, the hand of the resulting fiber laminate becomes hard and the moisture permeability is insufficient.

The fiber product of the present invention can be obtained by using the fiber laminate partially or entirely. For example, when the fiber laminate is used as a whole to be processed into a fiber product, the fiber laminate is cut into a desired shape and size, and the cut materials are sewn or welded to be processed into a fiber product. When the fiber laminate of the present invention is partially used to form a textile product, the fiber laminate of the present invention may be used together with a conventional fabric or the like to form a textile product in the same manner.

The fiber laminate may be sewn using a sewing machine or the like. The sewing thread used for sewing is not particularly limited as long as it is a thread, and threads such as cotton, silk, hemp, viscose, polyamide resin, polyester resin, polyvinyl alcohol fiber, and polyurethane resin may be used alone or in combination. From the viewpoint of strength, heat resistance and the like, it is preferable to use a polyamide resin or a polyester resin. The thickness of the sewing thread may be appropriately adjusted depending on the thickness of the sewn fiber laminate and the required product strength, and for example, in the case of a fiber laminate having a 3-layer structure obtained by sewing a polyester resin sewing thread on one surface of a fabric (78dtex nylon taffeta) to laminate an expanded porous PTFE film with an adhesive layer and to laminate a woven fabric (22dtex nylon taffeta: the total value of the cover factor of the warp and weft is 700 to 1400), it is preferable to use a 40 to 70-gauge sewing thread.

The sewing method is not particularly limited as long as it is a method of sewing with 1 or more threads, and examples of the sewing form include a method of sewing in a straight line, a curved line, a zigzag line, and the like by using a flat seam, a single-thread chain seam, a double-thread lock seam, and the like.

Examples of the method of welding the fiber laminate include a method of directly welding the fiber laminate cut into a desired shape and size by thermocompression bonding, and a method of indirectly welding the fiber laminate by using a sheet made of a hot-melt resin (hereinafter, also simply referred to as "hot-melt sheet"). Examples of the hot-melt Sheet include a "Gore-seam Adhesive Sheet (Sheet Adhesive)" manufactured by austex gmbh of japan (ジヤパンゴアテツクス). The hot-melt resin of the hot-melt sheet may be the same as that used for the hot-melt adhesive layer of the caulking tape, and the conditions for the fusion-bonding of the fiber laminate using the hot-melt sheet may be the same as those for the pressure-bonding of the caulking tape described later.

A caulking process is performed for at least a part (preferably all) of the portions where the fiber laminate is sewn or welded. This is because the sealing properties such as water resistance, dust resistance, and wind resistance and the strength of the obtained fiber product are improved by the caulking treatment. In particular, when a fiber product is processed by welding a fiber laminate, the strength of the welded portion of the obtained fiber product is reduced, and therefore, the strength of the welded portion of the obtained fiber product is improved by performing caulking treatment on the welded portion using a caulking tape or the like.

The caulking tape using the hot melt adhesive can be subjected to hot air blowing to the hot melt adhesive layer side of the caulking tape, and the tape is welded to an adherend by a conventional hot air sealing machine in pressure contact with a pressure roller in a state where the hot melt adhesive is melted. For example, "QHP-805" manufactured by kunley electronics industries, ltd (クインライト electronics industries), or "5000E" manufactured by gol corporation (w.l. gold & ASSOCIATES) may be used. Further, in order to weld and process short sewn portions more easily, the caulking tape may be thermocompression bonded by a commercially available thermocompressor or an iron. At this time, heat and pressure are applied to the joint tape from above in a state of being overlapped on the sewn portion.

The thermocompression bonding conditions of the caulking tape using the hot melt adhesive may be appropriately set according to the softening point of the hot melt adhesive, the thickness, material, welding speed, and the like of the flexible film. As an example of the thermocompression bonding of the caulking tape using the hot melt adhesive, for example, in the case where a 3-layer structure fiber product formed by laminating a porous PTFE film on one surface of a fabric (78dtex nylon taffeta) and a woven fabric (22dtex nylon taffeta: the sum of the cover factor of warp and weft is 700 to 1400) is thermocompression bonded with the caulking tape using the hot melt adhesive, the caulking tape is attached to a hot air sealer, and the thermocompression bonding is performed under the condition that the surface temperature of the hot melt adhesive is 150 to 180 ℃, preferably 160 ℃. Then, the temperature is cooled to a heating portion temperature and returned to room temperature in this state, thereby completing the thermocompression bonding.

The present invention will be described below with reference to the drawings, but the present invention is not limited to the embodiments shown in the drawings. Fig. 1 is a cross-sectional view schematically illustrating a caulking belt of the present invention. The joint sealing tape 1 shown in fig. 1 is in a form in which a porous film made of a hydrophobic resin is used as a base film 3, a woven fabric 5 having a total value of cover factors of warp and weft of 500 to 1400 is laminated on one surface of the base film, an adhesive layer 7 is laminated on the other surface of the base film, and the woven fabric 5 and the base film 3 are bonded to each other by a hot-melt adhesive 9. The porous film made of a hydrophobic resin has a hydrophilic resin layer 11 formed on the side where the adhesive layer is formed.

Fig. 2 is a sectional view schematically illustrating a sewn portion after a fiber laminate preferably used in the present invention is sewn and subjected to caulking treatment with the caulking tape of the present invention. In the fiber laminate 2, a woven fabric 6 having a total value of cover factors of warp and weft of 700 to 1400 is laminated on one surface of a flexible film 4, and a fabric 8 is laminated on the other surface. In the fiber laminate 2, the end portions are welted, and the welted portions are overlapped with the end portions of the other fiber laminate 2' and sewn together with the sewing thread 10. The caulking tape 1 is adhered so as to cover the stitched portion, and a part of the hot melt adhesive layer 7 is impregnated into the surface (not shown) of the fabric 6 laminated on the fiber laminate 2.

Fig. 3 is a sectional view schematically illustrating a welded portion where a fiber laminate preferably used in the present invention is welded and caulking treatment is performed by the caulking tape of the present invention. The fiber laminate 2 and the fiber laminate 2' are respectively welded at the end portions to form a welded portion 12, and a caulking tape is adhered in a state of covering the welded portion 12.

Examples

[ evaluation method ]

1. Mass per unit length of joint-filling tape

The joint filling tape (width: 22mm) prepared in the experimental example was cut into a length of 1m, the mass thereof was measured with an electronic balance which could measure up to 0.01g, and the next digit was rounded up as the mass per unit length.

2. Thickness measurement of joint-filling tape

The thickness was measured using a 1/1000mm direct-reading thickness gauge manufactured by dele corporation (テクロツク Co.) without applying a load other than the own spring load, and the next position was rounded off to obtain the thickness.

3. Tensile strength test of joint-filling tape

The 3-layer structure laminate prepared in the experimental example was cut into a size of 10mm in width and 100mm in length, and subjected to a tensile test. In the tensile test, AUTOGRAPH AGS-100A manufactured by shimadzu corporation was manufactured under conditions of a jig interval of 50mm and a tensile speed of 50 mm/min, and the breaking strength when the sample started to break was measured. The tensile strength at the stage of 10% elongation was defined as 10% modulus. The tensile strength test was performed in both the longitudinal direction and the width direction of the caulking tape.

4. Velcro abrasion durability test of joint-filling tape

The abrasion durability of the side on which the raw fabric (woven fabric or knitted fabric) was laminated was performed for the joint tape produced in the experimental example. The hook side of the hook was attached to a friction pad of type II friction tester described in JIS L0849 ("Quicklon 1 QN-N20" manufactured by YKK corporation), and the test piece was attached to a test piece stand. The hook was attached to the friction element so that the hook side faced the test piece side. The test piece was mounted on the test piece stand such that the side of the calking tape on which the raw fabric (woven fabric or knitted fabric) was laminated faced upward (the side of the friction piece). In this state, a 2N load was applied to the friction element, and the state of the rubbed portion of the test piece was observed by rubbing 100 times. The case where any damage was present in the test piece was regarded as abnormal, and the case where no damage was found was regarded as no abnormality.

5. Water resistance of joint filling part

The water resistance test of the caulking portion was performed on test pieces after initial and 20-time washing treatments using a water resistance test apparatus described in JIS L1096 (low water pressure method) ("schober type water resistance tester WR-DM" manufactured by honor science essence creation). After applying a water pressure of 20kPa to the portion (intersection) of the test piece subjected to the caulking treatment from the side subjected to the caulking treatment and holding for 1 minute, when water appears on the surface of the test piece opposite to the side to which the water pressure is applied, the test piece is judged as being defective due to poor water resistance, and is judged as being acceptable when no water is observed at all.

The washing treatment was carried out using a full-automatic household washing machine ("NA-F70 PX 1" made by matsuzu electrical appliances ), and the process of drying was carried out by hanging at room temperature for 24 hours, as 1 cycle. The test piece obtained by repeating this cycle 20 times was subjected to a water resistance test after 20 washing treatments. For washing, a 35 × 35cm load cloth (made of a cotton wide and thin cloth as specified in JIS L1096, and subjected to a lock-stitch treatment by sewing the periphery) was adjusted so that the total amount of the load cloth and the cloth as a test piece became 300 ± 30 g. Washing was carried out for 6 minutes using 40 liters of tap water and 30g of a synthetic detergent for washing ("Jieba" manufactured by Kao corporation), followed by washing 2 times and dehydration for 3 minutes.

6. Tensile strength test of caulked portion

The tensile strength test of the caulked portion was performed using a material testing apparatus "3365" manufactured by instron corporation (インストロン). The test conditions of the tensile test were that the interval between the grips was 50mm, the grip size was 25mm × 25mm, and the stretching speed was 50 mm/min. The strength at which the sample started to be destroyed was measured as the destruction strength.

7. Determination of yarn fineness

The fineness (dtex) of the warp and weft of the fabric was measured in accordance with JIS L1096. The fineness of the filaments constituting the warp and weft is calculated by dividing the fineness of the warp or weft by the number of filaments constituting the warp or weft.

8. Density measurement of fabrics

The warp density and weft density (strip/2.54 cm) of the fabric were measured based on JIS L1096, respectively.

[ production of Caulking tape and evaluation of Caulking tape ]

EXAMPLE 1 (example)

The mass per unit area of the substrate film used was 33g/m²The porous PTFE film (manufactured by Ottx corporation, Japan, ジヤパンゴアテツクス, porosity: 80%, maximum pore diameter: 0.2 μm, average thickness: 30 μm). Next, ethylene glycol was added to a hydrophilic urethane resin ("HYPOL 2000" manufactured by Dow chemical company, ダウケミカル/Co.) in such a ratio that the NCO/OH equivalent ratio became 1/0.9, and the mixture was stirred to prepare polyurethaneA coating liquid of the ester prepolymer. The coating liquid of the polyurethane prepolymer is applied (impregnated into a part of the surface layer of the film) to one surface of the porous PTFE film by a roll coater. The coating weight was 10g/m². Then, the substrate was put into a heating furnace adjusted to a temperature of 80 ℃ and a humidity of 80% RH for 1 hour, and cured by reaction with moisture, thereby forming a substrate film in which a hydrophilic urethane resin layer was formed on one surface of a porous PTFE film.

Next, a plain weave fabric A made of nylon 66 having a total value of cover factors of the warp and weft of 1117 (both of the warp and weft are false twist processed yarns having a fineness of 17dtex, the number of filaments of both the warp and weft is 5, the number of filaments of both the warp and weft is 3.4dtex, the density of the warp is 138 pieces/2.54 cm, the density of the weft is 133 pieces/2.54 cm, and the mass per unit area is 19g/m²) The porous PTFE was bonded to the side on which the hydrophilic urethane resin layer was not formed, using a moisture-curable polyurethane hot-melt adhesive ("Hibon 4811" manufactured by hitachi chemical polymer corporation (hitachi ポリマ)). The temperature of the curing reaction type polyurethane hot melt adhesive is 120 ℃ as the condition of the bonding processing, and the temperature is 5g/m²The adhesive transfer amount of (3) was measured by applying the melt in a dot form to a porous PTFE film by means of a gravure roll having a coverage of 60%, and then pressure-bonding the melt to the web by means of a roller. After the press-bonding with a roller, the resultant was left to stand in a constant temperature and humidity chamber at 60 ℃ and 80% RH for 24 hours to cure the reactive hot-melt adhesive, thereby obtaining a laminate having a 2-layer structure.

Then, pellets of a polyurethane hot-melt resin (LB-25M manufactured by gore & ASSOCIATES) were extrusion-coated on the surface of the base film of the 2-layer laminate on the side where the hydrophilic polyurethane resin layer was formed, using an extrusion molding machine having a die temperature of 180 ℃, to a thickness of 100 μ M, thereby obtaining a 3-layer laminate composed of a woven fabric, a base film, and a polyurethane hot-melt adhesive layer. Subsequently, the 3-layer laminate was slit at a width of 22mm while applying a tension of 100N/m, to obtain a caulking tape.

EXAMPLE 2 (example)

Except that a commercial nylon 6 plain weave fabric B having a total of coverage factors of warp and weft of 1275 was used (both of the warp and weft were false twist processed yarns having a fineness of 33dtex, the number of filaments of the warp was 6, the number of filaments of the weft was 10, the fineness of filaments of the warp was 5.5dt ex, the fineness of filaments of the weft was 3.3dtex, the density of the warp was 121 pieces/2.54 cm, the density of the weft was 101 pieces/2.54 cm, and the mass per unit area was 25g/m²) The processing was carried out under the same processing conditions as in experimental example 1, except that the fabric a in experimental example 1 was replaced, to obtain a calking tape.

EXAMPLE 3 (example)

Except that a plain weave fabric C made of a commercially available nylon 66 having a total value of cover factors of the warp and the weft of 660 was used (both the warp and the weft were false twist processed yarns having a fineness of 17dtex, the number of filaments of both the warp and the weft was 5, the fineness of filaments of both the warp and the weft was 3.4dtex, the density of the warp was 95 pieces/2.54 cm, the density of the weft was 65 pieces/2.54 cm, and the mass per unit area was 7g/m²) The base film was processed under the same processing conditions as in example 1 except that a non-porous polyester film (FLECRON film M type manufactured by Okara Kabushiki Kaisha (オ - ジ Co., Ltd.) having a thickness of 15 μ M) was used instead of the fabric A in example 1, and a hydrophilic urethane resin layer was not formed, to obtain a calking tape.

EXAMPLE 4 (example)

A caulking tape was obtained by processing under the same processing conditions as in experimental example 1, except that the thickness of the polyurethane hot melt adhesive layer in experimental example 1 was 150 μm.

EXAMPLE 5 (COMPARATIVE EXAMPLE)

Except that a commercially available warp knitted fabric D formed of nylon 66 fibers (fineness of both wales and courses is 22dtex, density of wales is 36 pieces/2.54 cm, density of courses is 50 pieces/2.54 cm, mass per unit area is 33 g/m) was used²) In place of the woven fabric A in Experimental example 1, the thickness of the polyurethane hot-melt adhesive layer was 150 μm, and the tension during slitting was setThe processing was carried out under the same processing conditions as in example 1 except that the thickness was 65N/m, to obtain a joint sealing tape.

EXAMPLE 6 (COMPARATIVE EXAMPLE)

The slit tape was obtained under the same processing conditions as in experimental example 1 except that the thickness of the polyurethane hot-melt adhesive layer in experimental example 5 was 100 μm and the tension during slitting was 65N/m.

EXAMPLE 7 (COMPARATIVE EXAMPLE)

Except that a plain weave fabric E made of a commercially available nylon 66 having a total covering factor of the warp and the weft of 1526 was used (both the warp and the weft were false twist processed yarns having a fineness of 17dtex, the number of filaments of both the warp and the weft were 5, the fineness of filaments of both the warp and the weft were 3.4dtex, the density of the warp was 178 pieces/2.54 cm, the density of the weft was 192 pieces/2.54 cm, and the mass per unit area was 27g/m²) The base film was processed under the same processing conditions as in example 1 except that a non-porous polyester film (FLECRON film M type manufactured by Okara Kabushiki Kaisha (オ - ジ Co., Ltd.) having a thickness of 15 μ M) was used instead of the fabric A in example 1, and a hydrophilic urethane resin layer was not formed, to obtain a calking tape.

EXAMPLE 8 (COMPARATIVE EXAMPLE)

Except that a commercial nylon 6 plain weave fabric F having a total value of cover factors of the warp and weft of 1436 was used (both the warp and weft were false twist processed yarns having a fineness of 33dtex, the number of filaments of the warp was 6, the number of filaments of the weft was 10, the fineness of filaments of the warp was 5.5dtex, the fineness of filaments of the weft was 3.3dtex, the density of the warp was 126 pieces/2.54 cm, the density of the weft was 124 pieces/2.54 cm, and the mass per unit area was 28g/m²) The processing was carried out under the same processing conditions as in experimental example 1, except that the fabric a in experimental example 1 was replaced, to obtain a calking tape.

EXAMPLE 9 (COMPARATIVE EXAMPLE)

A plain weave fabric G (warp yarn and weft yarn) made of a commercially available nylon 66 having a total cover factor of 491 was usedBoth the yarn and the weft yarn were false twist processed yarn having a fineness of 17dtex, the number of filaments of the warp yarn and the weft yarn was 5, the density of the warp yarn was 65 pieces/2.54 cm, the density of the weft yarn was 54 pieces/2.54 cm, and the mass per unit area was 5g/m²) As a result of attempting lamination with the porous PTFE film, the fabric G was not boneless and could not be treated for lamination processing, and thus a laminate could not be obtained.

The structure of the caulking tapes produced in experimental examples 1 to 8 is shown in table 1, and the results of evaluating the quality, thickness, tensile strength, and abrasion durability of the velcro tapes per unit length of the caulking tapes of experimental examples 1 to 8 are summarized in table 2.

[ Table 1]

[0219] [ Table 2 ]]

< quality >

As is clear from table 2, the tapes of examples 5 and 6 using the warp knitted fabric had a larger mass than the calking tapes of the present invention (examples 1 to 4) having the same thickness of the hot melt adhesive layer. Therefore, the caulking tape of the present invention was confirmed to be excellent in lightweight property.

< thickness >

The tapes of experimental examples 5 and 6 using the warp knit fabric were thicker than the other tapes. From the results, it was found that the caulking tape of the present invention can be suitably used for clothing products requiring portability.

< tensile Strength >

The 10% modulus and tensile strength of the caulk tape of the present invention was better than the caulk tapes of experimental examples 5 and 6 in which warp knit fabrics were laminated. As is clear from the results, the caulking tape of the present invention is less likely to cause necking during slitting and coating processes, has good productivity and tape width stability, and can achieve strength at the joint portion of the fiber product, as compared with a conventional caulking tape obtained by laminating warp knitted fabrics.

< durability against abrasion of hook and loop fastener >

As is clear from table 2, none of the caulking belts (experimental examples 1 to 4) of the present invention was found to be abnormal, and exhibited good abrasion durability. On the other hand, in the case of the experimental examples 5 and 6 in which the warp knitted fabrics were laminated, the water resistance of the clothing was likely to be deteriorated when the velcro tapes were used for the clothing.

Fig. 4 shows an electron microscope photograph of the fabric used in experimental example 1, and fig. 5 shows an electron microscope photograph of the warp knitted fabric used in experimental example 5.

[ production of fiber product, evaluation of fiber product ]

The fiber laminates were processed into fiber products using the caulking tapes produced in experimental examples 1 to 8, and the performance of the caulking tapes was tested.

1. Production of fiber laminate

1-1. production of fiber laminate AH

The mass per unit area of the flexible waterproof moisture-permeable film was 33g/m²The porous PTFE film (manufactured by Ottx corporation of Japan, Inc. (ジヤパンゴアテツクス Co., Ltd.), with a void fraction of 80%, a maximum pore diameter of 0.2 μm, and an average thickness of 30 μm), and a plain weave fabric A made of nylon 66 (wherein both the warp and weft are false twist processed yarns having a fineness of 17dtex, the number of filaments of both the warp and weft are 5, and the warp and weft are a plain weave fabric A having a total value of cover factors of 1117 and being laminated on the side to be subjected to caulking in processing into a fiber productThe fineness of the filaments was 3.4dtex, the density of the warp yarns: 138 pieces/2.54 cm, density of weft yarn: 133 strips/2.54 cm, mass per unit area 19g/m²) For the fabric laminated on the other side, a commercially available woven fabric H having a plain weave made of nylon 66 (both the fineness of the warp and the weft are 17dtex, the density of the warp: 165 stripes/2.54 cm, density of weft yarns: 194 strips/2.54 cm, mass per unit area 27g/m²). Further, as the hydrophilic resin to be impregnated into the porous PTFE film, ethylene glycol was added to a hydrophilic polyurethane resin ("HYPOL 2000", manufactured by dow chemical company, ダウケミカル) in such a ratio that the equivalent ratio of NCO/OH became 1/0.9, and the mixture was mixed and stirred to prepare a coating solution of a polyurethane prepolymer.

The coating liquid of the polyurethane prepolymer is applied (impregnated into a part of the surface layer of the film) to one surface of the porous PTFE film by a roll coater. The coating weight was 10g/m². Subsequently, the porous PTFE film was put into a heating furnace adjusted to a temperature of 80 ℃ and a humidity of 80% RH for 1 hour, and cured by reaction with moisture, thereby forming a hydrophilic polyurethane resin layer on one surface of the porous PTFE film. The fabric a is laminated on one side of the hydrophilic urethane resin layer formed on one surface of the porous PTFE membrane, and the fabric H is laminated on the other side.

The adhesive bonding of the fabric A, H to the porous PTFE film was carried out using a moisture-curable polyurethane hot-melt adhesive ("Hibon 4811" manufactured by hitachi chemical industries, inc., ポリマ). The temperature of the curing reaction type polyurethane hot melt adhesive reaches 120 ℃ and is 5g/m²The adhesive transfer amount of (3) was applied in a dot form to a porous PTFE film by passing the melt through a gravure roll having a coverage of 40%, and then the resultant was pressed against the porous PTFE film by a roll. After the press-bonding by a roller, the resultant was left to stand in a constant temperature and humidity chamber at 60 ℃ and 80% RH for 24 hours to cure the curing reaction type polyurethane hot-melt adhesive, thereby obtaining a 3-layer fiber laminate. Next, the fabric H of the laminate having a 3-layer structure was subjected to water repellency treatment. A dispersion was prepared by mixing 3 mass% of a water repellent (Asahi Guard AG7000, manufactured by Ming Kasei Chemicals, Ltd. (Ming Kasei Chemicals )) and 97 mass% of water, and the mixture was passed through a kiss coater to obtain a dispersion having a saturation amount of water or moreThe coating was applied to the surface of fabric H and the excess dispersion was squeezed out by a roller. The amount of the dispersion absorbed into the fabric at this time was about 20g/m². Then, the raw fabric was dried in a hot air circulation oven at 130 ℃ for 30 seconds to obtain a water-repellent laminate AH having a 3-layer structure.

1-2 preparation of fiber laminate DH

Except that a commercially available warp knitted fabric D formed of nylon 66 fibers (fineness of both wales and courses is 22dtex, density of wales is 36 pieces/2.54 cm, density of courses is 50 pieces/2.54 cm, mass per unit area is 33 g/m) was used²) Instead of the web A laminated on the side to be subjected to the caulking treatment in the laminate AH, the transfer amount of the adhesive at the time of lamination was set to 8g/m²Otherwise, the processing was performed under the same processing conditions as for the fiber laminate AH, to obtain a fiber laminate DH having a 3-layer structure.

The structures of fiber laminates AH and DH produced by the above methods are shown in table 3. Further, the bonded portions were produced by the following method using the fiber laminates AH and DH, respectively.

[ Table 3]

[0242] 2. Fabrication of bonded structures

2-1. jointing structure based on sewing

< Water resistance test of caulked part >

The fiber laminates AH and DH were cut into 300mm × 300mm, respectively, and the blank was cut into 4 square test pieces of the same size in a cross-cut manner at the center. These were folded in their original shapes with a polyester sewing machine thread (No. 50) to have a seam width of 7mm, and then double-seamed parallel to the seam ends to form a test piece with a cruciform seam (sewn portion) at the center (FIG. 6 (a)).

< for testing tensile Strength of Joint portion >

Using the fiber laminates AH and DH, test pieces were prepared which had a width of 100mm and a length of 200mm and were provided with a straight sewn portion at the center in the longitudinal direction.

For all the test pieces, as shown in FIG. 6(b), the blank was further cross-cut at the center to prepare 4 square test pieces of the same size. After folding the hem with a hem width of 7mm, double-sewing was performed parallel to the end of the seam. The sewing thread used was polyester sewing machine thread (No. 50).

2-2. jointing structure based on ultrasonic welding

< Water resistance test of caulked part >

The fiber laminates AH and DH were cut into 300mm × 300mm, respectively, and the blank was cut into 4 square test pieces of the same size in a cross-cut manner at the center. These were welded to each other in the original shape to produce a test piece having a welded portion as a joint (fig. 7 (a)).

< for testing tensile Strength of Joint portion >

As a test piece to be subjected to the tensile strength test of the caulking portion, a test piece having a size of 100mm in width and 200mm in length and provided with a linear welded portion at the center in the longitudinal direction was produced.

All the test pieces were welded together by fusing the ends of the fiber laminate together with an ultrasonic sealer (US 1170 of Kyowa Kagaku K.K. (ブラザ - )) at a processing speed of 3.0 m/min by using a fusing blade having a tip radius of 0.1 mm. Fig. 7(b) schematically shows a cross-sectional structure of the welded portion.

2-3. filling treatment

The caulking tape was placed so as to cover the joined portion (sewn portion and welded portion) of these test pieces, and caulking was performed by a hot air sealer ("5000E" manufactured by gore & ASSOCIATES) under conditions of a set temperature of 700 ℃ and a processing speed of 4 m/min.

A crossing part formed by crossing joint tapes is formed at the center of a test piece for testing the water resistance of the joint part.

Experimental example 10

The sewn portion and the welded portion of the test piece made of the fiber laminate AH on the side of the fabric a were subjected to caulking treatment with the caulking tape of example 1, respectively, to prepare test pieces for a water resistance test of a caulk portion and a tensile strength test of a caulk portion. The caulking treatment was performed by using a hot air sealer ("5000E" manufactured by gore & ASSOCIATES) under conditions of a set temperature of 700 ℃ and a processing speed of 4 m/min.

Experimental example 11

Test pieces for the water resistance test of the caulking portion and the tensile strength test of the caulking portion were prepared by processing the caulking tape prepared in experimental example 2 under the same processing conditions as in experimental example 10, except that the caulking tape in experimental example 10 was used.

Experimental example 12

Test pieces for the water resistance test of the caulking portion and the tensile strength test of the caulking portion were prepared by processing the caulking tape prepared in experimental example 3 under the same processing conditions as in experimental example 10, except that the caulking tape in experimental example 10 was used.

Experimental example 13

Test pieces for the water resistance test of the caulking portion and the tensile strength test of the caulking portion were prepared by processing the caulking tape prepared in experimental example 4 under the same processing conditions as in experimental example 10, except that the caulking tape in experimental example 10 was used.

Experimental example 14

Test pieces for the water resistance test of the caulking portion and the tensile strength test of the caulking portion were prepared by processing the caulking tape prepared in experimental example 5 under the same processing conditions as in experimental example 10, except that the caulking tape in experimental example 10 was used.

Experimental example 15

Test pieces for the water resistance test of the caulking portion and the tensile strength test of the caulking portion were prepared by processing the caulking tape prepared in experimental example 6 under the same processing conditions as in experimental example 10, except that the caulking tape in experimental example 10 was used.

Experimental example 16

Test pieces for the water resistance test of the caulking portion and the tensile strength test of the caulking portion were prepared by processing the caulking tape prepared in experimental example 7 under the same processing conditions as in experimental example 10, except that the caulking tape in experimental example 10 was used.

Experimental example 17

Test pieces for the water resistance test of the caulking portion and the tensile strength test of the caulking portion were prepared by processing the caulking tape prepared in experimental example 8 under the same processing conditions as in experimental example 10, except that the caulking tape in experimental example 10 was used.

Experimental example 18

The sewn portion and the welded portion on the fabric D side of the test piece made of the fiber laminate DH were subjected to caulking treatment with the caulking tape of example 1, respectively, to prepare test pieces for a water resistance test of a caulk portion and a tensile strength test of a caulk portion. The caulking treatment was performed by using a hot air sealer ("5000E" manufactured by gore & ASSOCIATES) under conditions of a set temperature of 700 ℃ and a processing speed of 4 m/min.

Experimental example 19

Test pieces for the water resistance test of the caulking portion and the tensile strength test of the caulking portion were prepared by processing the caulking tape prepared in experimental example 2 under the same processing conditions as in experimental example 18, except that the caulking tape in experimental example 18 was used.

Experimental example 20

Test pieces for the water resistance test of the caulking portion and the tensile strength test of the caulking portion were prepared by processing the caulking tape prepared in experimental example 3 under the same processing conditions as in experimental example 18, except that the caulking tape in experimental example 18 was used.

Experimental example 21

Test pieces for the water resistance test of the caulking portion and the tensile strength test of the caulking portion were prepared by processing the caulking tape prepared in experimental example 4 under the same processing conditions as in experimental example 18, except that the caulking tape in experimental example 18 was used.

Experimental example 22

Test pieces for the water resistance test of the caulking portion and the tensile strength test of the caulking portion were prepared by processing the caulking tape prepared in experimental example 5 under the same processing conditions as in experimental example 18, except that the caulking tape in experimental example 18 was used.

Experimental example 23

Test pieces for the water resistance test of the caulking portion and the tensile strength test of the caulking portion were prepared by processing the caulking tape prepared in experimental example 6 under the same processing conditions as in experimental example 18, except that the caulking tape in experimental example 18 was used.

Experimental example 24

Test pieces for the water resistance test of the caulking portion and the tensile strength test of the caulking portion were prepared by processing the caulking tape prepared in experimental example 7 under the same processing conditions as in experimental example 18, except that the caulking tape in experimental example 18 was used.

Experimental example 25

Test pieces for the water resistance test of the caulking portion and the tensile strength test of the caulking portion were prepared by processing the caulking tape prepared in experimental example 8 under the same processing conditions as in experimental example 18, except that the caulking tape in experimental example 18 was used.

The test pieces subjected to caulking treatment obtained in experimental examples 10 to 25 were subjected to a caulking portion water resistance test and a caulking portion tensile strength test. The results are shown in Table 4.

[ Table 4]

Water resistance of caulking portion was evaluated at intersection portion

< Water resistance of caulked part >

As is clear from table 4, in experimental examples 10 to 13 using the caulking tape having a cover factor of 500 to 1400 of the fabric laminated on the base film, the water resistance at the intersection portion was good and the water resistance was good for the fiber laminated body AH both at the initial stage and after 20 times of washing.

On the other hand, in experimental examples 16 and 17 using the caulking tape having the cover factor of 1400 or more of the woven fabric laminated on the base film, the water resistance at the intersection portion was low from the beginning, and the water-repellent effect was not obtained. This is considered to be because in the caulking tape having the coefficient of coverage of the stacked woven fabric of 1400 or more, the density of the woven fabric is too high, and therefore, at the intersection of the caulking tapes, the hot melt adhesive of the caulking tape of the second layer is less impregnated into the woven fabric stacked in the caulking tape of the first layer, and the caulking effect is reduced. In addition, in experimental examples 14 and 15 using a caulking tape in which a warp knitted fabric was laminated on a base film, the initial water resistance was good, but the water resistance of experimental example 15 using a caulking tape in which the thickness of the hot melt adhesive layer was 100 μm after washing 20 times was lowered. This is considered to be because the thickness of the warp knitted fabric is larger than that of the fabric of the present invention, and therefore the hot melt adhesive layer having a thickness of 100 μm cannot sufficiently impregnate the inside of the warp knitted fabric, and the caulking effect is lowered.

As for the evaluation results of the water resistance of the fiber laminate DH, in the experimental examples 18 to 21 in which the caulking tape of the present invention was used for caulking treatment, the initial water resistance was good, but the water resistance after 20 washes of the experimental examples 18 to 20 was poor, and the good water resistance was obtained in the experimental example 21 in which only the caulking tape having a thickness of 150 μm of the hot-melt adhesive layer was used. This is considered to be because the raw fabric on the side of the fiber laminate DH treated with the caulking tape is a warp knitted fabric, and therefore, the space inside the warp knitted fabric cannot be sufficiently filled with the thickness of the 100 μm hot-melt adhesive layer, and a sufficient caulking effect cannot be obtained.

< tensile Strength of Joint part >

As a result of the tensile strength of the caulked portion, it was confirmed that each of the experimental examples maintained good strength when sewing was performed by a sewing machine. On the other hand, the strength of the experimental example in which joining by ultrasonic welding was performed was greatly different depending on the caulking tape. In examples 14 to 15 and 22 to 23 in which the seam-filling tapes in which the warp-knitted fabrics were laminated were used, the tensile strength was about 60N, and it could be said that the tape was difficult to be used for the strength of clothing. On the other hand, in each of examples 10 to 13 and 18 to 21 using the caulking tape according to the present invention, the tensile strength exceeded 100N, and the caulking tape could maintain a sufficiently high strength as compared with a caulking tape in which warp knitted fabrics were laminated. The value of 100N is not higher than that of a sewing method using a conventional sewing machine, but is sufficient for use in clothing products for which lightweight property is sought and for strength of general clothing.

< appearance of seam filling tape >

As a result of observing the appearance of the joint samples subjected to the caulking treatment on the caulking treatment side in experimental examples 10 to 25, the boundary seams between the lining surface (the side of the fabric a) of the fiber laminate and the caulking tape were not conspicuous in experimental examples 10 to 13, and the appearance was beautiful.

On the other hand, the structures of the caulking tapes of experimental examples 14 to 15, 18 to 21, and 24 to 25 and the lining material (the side subjected to caulking treatment) of the fiber laminate were different in appearance, and therefore the appearance of the caulking tapes was conspicuous.

In experimental examples 22 to 23, the seam filling tape subjected to the seam filling treatment in the longitudinal direction and the lining material of the fiber laminate were in the same stitch direction, and therefore the boundary seam between the lining material surface (the fabric D side) of the fiber laminate and the seam filling tape was not conspicuous, but the seam filling tape subjected to the seam filling treatment in the direction perpendicular to the longitudinal direction and the lining material of the fiber laminate were different in stitch direction, and therefore the appearance of the seam filling tape was conspicuous. If the joint tape is conspicuous, the appearance of the side subjected to the joint filling treatment after the clothing article is produced is not good.

2-4 evaluation of clothes

The fiber laminate AH and the calking tapes of experimental example 1 and experimental example 5 were combined to prepare outdoor jackets. The joint-filling tape required 15m per 1 piece. The outdoor jacket using the caulking tape of the present invention (experimental example 1) was lighter by 26g than the outdoor jacket made using the caulking tape of experimental example 5. In addition, the joint tape is not obvious and has good appearance.

Possibility of industrial utilization

The present invention can be suitably used for the caulking treatment of fiber products, and can be suitably used for various fiber products such as clothing products, sheets, tents, sleeping bags, and the like. Particularly, it is suitable for clothing products requiring waterproof and moisture permeability.

Claims

1. A joint tape comprising a base film, a woven fabric laminated on one surface of the base film, and an adhesive layer laminated on the other surface of the base film, characterized in that the total value of the Cover Factor (CF) of the warp and weft constituting the woven fabric is calculated from the following formula_{Total up to}) 500 to 1300;

CF_mthe covering coefficient of the warp yarns is determined,

CF_tthe cover factor of the weft yarn is determined,

F_mthe titer of the warp is dtex,

F_tthe fineness of the weft yarn is dtex,

D_mthe density of the warp yarns is strip/2.54 cm,

D_tthe density of the weft yarns is in strips/2.54 cm.

2. The caulking tape of claim 1, wherein the warp yarns have a Cover Factor (CF)_m) Or Cover Factor (CF) of weft_t) At least one of them is in the range of 200 to 800.

3. The caulking tape according to claim 1 or 2, wherein at least one of the warp and the weft constituting the fabric is constituted by 2 or more filaments.

4. The joint sealing tape according to claim 3, wherein the filament has a fineness of 12dtex or less.

5. The caulking tape according to claim 1, wherein at least one of warp yarns or weft yarns constituting the fabric is a long fiber.

6. The caulking tape according to claim 1, wherein at least one of warp yarns or weft yarns constituting the fabric is a processed yarn.

7. The caulking tape of claim 1, wherein the fabric is formed of a plain weave.

8. The caulking tape of claim 1, wherein the substrate film is a film having water repellency.

9. The caulking tape according to claim 8, wherein the film having water repellency is a porous film formed of a hydrophobic resin.

10. The caulking tape according to claim 9, wherein the porous film formed of a hydrophobic resin is a porous polytetrafluoroethylene film.

11. The joint sealing tape according to claim 9 or 10, wherein the porous film made of a hydrophobic resin has a hydrophilic resin layer on the side where the adhesive layer is laminated.

12. The caulking tape of claim 1, wherein the adhesive of the adhesive layer is a hot melt adhesive.

13. The caulking tape of claim 12, wherein the hot melt adhesive is a polyurethane resin.

14. The tape of claim 12, wherein the adhesive layer has a thickness of less than 120 μm.

15. The caulking tape according to claim 1, wherein the caulking tape has a 10% modulus in a length direction of 10 to 50N/cm.

16. A fiber product obtained by sewing a fiber laminate, characterized in that at least a part of a sewn portion is subjected to caulking treatment using the caulking tape according to any one of claims 1 to 15.

17. A fiber product obtained by fusion-bonding a fiber laminate, characterized in that at least a part of a fused portion is subjected to caulking treatment using the caulking tape according to any one of claims 1 to 15.

18. The textile product according to claim 16 or 17, wherein the fiber laminate comprises a flexible film, a woven fabric laminated on one surface of the flexible film, and a fabric laminated on the other surface of the flexible film, and the total value of the Cover Factor (CF) of warp and weft yarns constituting the woven fabric is calculated from the following formula_{Total up to}) 700 to 1300, the fabric side of the fiber laminate is subjected to caulking treatment;

CF_mthe covering coefficient of the warp yarns is determined,

CF_tthe cover factor of the weft yarn is determined,

F_mthe titer of the warp is dtex,

F_tthe fineness of the weft yarn is dtex,

D_mthe density of the warp yarns is strip/2.54 cm,

D_tthe density of the weft yarns is in strips/2.54 cm.

19. Fibrous product according to claim 18, wherein the warp yarns have a Cover Factor (CF)_m) Or Cover Factor (CF) of weft_t) At least one of them is in the range of 300 to 800.

20. The fibrous article of claim 18, wherein said flexible film is a waterproof moisture-permeable film.

21. The fibrous article of claim 20, wherein said waterproof moisture-permeable film is a porous polytetrafluoroethylene film.

22. A fibrous article according to claim 16, wherein said fibrous article is an article of clothing.