KR20120039000A - Adhesive tape roll - Google Patents

Abstract

The adhesive tape roll 10 has the structure by which the adhesive tape 12 which has the adhesive surface 32 in one side of the base material 20 was wound around the adhesive surface 32 outside. The adhesive tape 12 is partially provided on the SIS-based adhesive layer 33 and the adhesive layer 33 forming the adhesive face 32 to prevent the adhesive face 32 from being in close contact with the other side of the substrate 20. A spacer 34 is provided. The spacer portion 34 has a non-acrylic polymer different from the pressure-sensitive adhesive layer 33 as a base polymer, and the storage modulus at 20 ° C. measured at a frequency of 1 Hz is 1.6 × 10 ⁵ to 4.2 × 10 ⁵ Pa. It is formed by an elastomer in the range.

Description

Adhesive tape roll {ADHESIVE TAPE ROLL}

The present invention relates to an adhesive tape roll wound so that the adhesive face faces outward. This application claims the priority based on Japanese Patent Application No. 2009-163144 for which it applied on July 9, 2009, The whole content of the application is integrated in this specification as a reference.

As an adhesive tape roll for cleaning, it is known that the adhesive tape in which the adhesive surface was formed in one side of the strip | belt-shaped base material was wound by roll shape so that the adhesive surface may face outward. Such an adhesive tape roll is attached to an appropriate jig (for example, refer to FIG. 3B of Patent Document 1), and rolls the adhesive surface in contact with a surface to be cleaned such as a floor, such as foreign matter on the surface to be cleaned (such as garbage, etc.). The object to be removed) is configured to be captured by the adhesive face. The other surface (back surface) of the said base material becomes the peeling process surface processed by application | coating of a silicone type peeling agent. This peeling process surface is provided in order to make it easy to peel off when peeling off the outermost adhesive tape as a contact surface which the adhesive surface of the adhesive tape of an inner periphery contacts when the adhesive tape is wound in roll shape.

Moreover, in patent document 2, formation of the said peeling process surface can be skipped by providing the peeling means (for example, the peeling material partially provided on the adhesive material layer which forms an adhesive surface) to the back surface of an adhesive tape on the adhesive surface of an adhesive tape. Techniques for causing this are described. Patent document 3 is a technical document regarding the apparatus suitable for the use which manufactures the adhesive tape of such a structure.

Japanese Utility Model Registration No. 2521127 Japanese Patent Application Publication No. 2007-117534 Japanese Patent Application Publication No. 2007-307272

When a large amount of foreign matter adheres to the roll surface (the adhesive surface of the outermost adhesive tape) and the adhesive force falls, such an adhesive tape roll is pulled out from the roll (peeled off from the inner adhesive tape) and cut out. It is used by exposing a new adhesive surface to a roll surface by 切 取. In order to avoid the trouble of the user frequently changing the adhesive tape roll, one adhesive tape roll is generally equipped with an adhesive tape (a number of turns) that can be used for about one month in a standard usage mode. ) In other words, it is assumed that about a month may elapse in a standard use mode from when a user starts using an adhesive tape roll to using it. Therefore, it is desired for the adhesive tape roll to show stable characteristics with respect to the passage of time.

However, in the adhesive tape roll of the structure in which the peeling material was provided on the adhesive material layer, the function (peeling performance with respect to the back surface of a base material) of this peeling material declines with time, and the force (rewinding | rewinding required in order to pull out an adhesive tape from a roll by this). Strength, or resistance to rewinding, was easy to rise. This increase in rewind force is not preferable because it may cause anxiety that the adhesive tape may be deteriorated. In addition, when the increase in the rewinding force is severe, it may be difficult to smoothly pull out the adhesive tape such as the substrate of the adhesive tape does not endure the rewinding and is broken in the middle. On the other hand, if the initial rewinding force is set low in anticipation of the rise of the rewinding force over time, the rewinding force becomes smaller than the adhesive force between the adhesive tape and the cleaned surface when the adhesive tape roll is rolled on the cleaned surface, and the adhesive tape is cleaned surface. It becomes easy to produce what is called rail drag phenomenon which sticks to and rolls loose. Moreover, when it makes design which made much of stabilization of rewind force, the usability of an adhesive tape roll tends to be impaired.

Therefore, an object of this invention is to provide the adhesive tape roll which can maintain a moderate rewind force stably, and is easy to use.

The adhesive tape roll disclosed here has a structure in which the adhesive tape having an adhesive face on one side of the substrate is wound so that the adhesive face faces outward. The said adhesive tape is equipped with the adhesive layer which forms the said adhesive surface. This adhesive layer consists of an adhesive which uses a styrene-isoprene-styrene block copolymer (SIS) as a base polymer. The pressure-sensitive adhesive tape further includes a spacer portion provided partially on the pressure-sensitive adhesive layer to prevent the pressure-sensitive adhesive surface from being in close contact with the other surface of the base material. Here, the said spacer part is formed of the elastomer which makes a base polymer the nonacryl-type polymer different from the said adhesive layer. The elastomer has a storage modulus at 20 ° C. measured at a frequency of 1 Hz in the range of approximately 1.6 × 10 ⁵ to 4.2 × 10 ⁵ Pa.

According to the adhesive tape roll of such a structure, SIS is employ | adopted as a base polymer (it refers to the component which occupies 50 weight% or more in a polymer component, ie, the component which occupies 50 weight% or more in the polymer component. As the base polymer of the elastomer forming the part, a polymer other than SIS (that is, a polymer different from the base polymer of the pressure-sensitive adhesive layer) is employed. By making the base polymer different in this way, it becomes difficult for the constituent components of the pressure-sensitive adhesive layer to migrate to the spacer portion, and thus prevents or suppresses the characteristic change of the spacer portion (such as an increase in adhesion to the back surface of the substrate) due to the transition of the constituent components. can do. In addition, among polymers other than SIS, the acrylic polymer has a weak drawing force to the pressure-sensitive adhesive layer containing SIS as the base polymer, and when the surface to be cleaned is rolled, the spacer part is peeled off from the pressure-sensitive adhesive layer and may migrate to the surface to be cleaned. Therefore, it is preferable to select polymers other than acrylic (non-acrylic polymer) as a base polymer of a spacer part. In addition, since the said spacer part is comprised by the elastomer in which the storage elastic modulus (Hereinafter, it may only be a storage elastic modulus) in 20 degreeC measured on the conditions of the frequency of 1Hz is made, it is favorable feeling (for example, the surface to be cleaned) When not rolled, it is not too heavy, not too light, and there is a feeling of touching a proper hand) can be stably realized.

The base polymer of the elastomer forming the spacer portion is styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene / butylene-styrene block copolymer (SEBS), crystalline polyolefin-ethylene / butylene-crystalline polyolefin block It may preferably be selected from the group consisting of copolymer (CEBC) and styrene-ethylene / butylene-crystalline polyolefin block copolymer (SEBC). Elastomers of this configuration are suitable for realizing the desired storage modulus disclosed herein. Moreover, it is also preferable from the point that the structural component of an adhesive layer is hard to transfer.

In a preferable aspect of the adhesive tape roll disclosed herein, the elastomer forming the spacer portion substantially does not contain SIS. When SIS is included in the spacer portion, the transfer of the pressure-sensitive adhesive layer component may be promoted by this SIS. Therefore, according to the above aspect in which the spacer portion does not substantially contain SIS, it is possible to more highly prevent or suppress the characteristic change of the spacer portion due to the transition of the constituent components.

In the adhesive tape roll disclosed here, after storing this adhesive tape roll for 30 days at 23 degreeC, it is preferable that the rewind force in the rewind speed | rate 1000mm / min exists in the range of about 0.5-2.5N / 150mm. The adhesive tape roll which exhibits such a rewinding force is hard to produce the said rail drag phenomenon, and can also easily take out the outermost adhesive tape after time passes. Moreover, it is preferable because the idea that the outer circumferential edge is wound naturally (unintentionally) during storage is unlikely to occur.

In a preferable aspect of the adhesive tape roll disclosed here, the shape of the said spacer part is linear (for example, the linear form extended along the longitudinal direction of an adhesive tape). It is preferable that the width of this line is made into about 0.1 mm-1 mm, for example. This makes it possible to balance both the rewinding force (which can also be understood as the adhesion to the substrate back) and the adhesion to the surface to be cleaned. Moreover, it is preferable that the said spacer part is formed so that the protrusion height from the said adhesive layer may be set to about 30 micrometers-120 micrometers. This makes it possible to balance both the rewind force and the adhesive force to the surface to be cleaned.

In another preferable aspect, the spacer portion is linear (typically linear) extending along the longitudinal direction of the adhesive tape. And the said some spacer part is provided in the pitch of about 0.5 mm-5 mm. According to the adhesive tape roll of such a structure, it can balance the rewind force and the adhesive force with respect to the surface to be cleaned.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows typically the adhesive tape roll which concerns on one Embodiment.
FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1.
3 is a plan view showing the opening shape of the extrusion die.
4 is a cross-sectional view taken along the line IV-IV of FIG. 3.
It is explanatory drawing which shows the evaluation method of a rotational resistance value and usability.
It is explanatory drawing which shows the evaluation method of a rotation resistance value and usability.

EMBODIMENT OF THE INVENTION Hereinafter, preferable embodiment of this invention is described. In addition, matters necessary for the practice of the present invention other than those specifically mentioned in the present specification may be understood as design matters of those skilled in the art based on the prior art in the relevant field. The present invention can be carried out based on the contents disclosed herein and common technical knowledge in the relevant field.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view of the adhesive tape roll which concerns on one Embodiment of this invention, and FIG. 2 is sectional drawing along the II-II line. This adhesive tape roll 10 uses the adhesive tape 12 in which the adhesive surface 32 was formed in one surface 20A of the elongate tape-shaped base material 20 in the form of a tape. It is wound in a roll shape around the core 14 so as to face this outer side (outer peripheral side of a roll). As the core 14, a paper (typically corrugated cardboard) can be preferably used from the viewpoints of cost, ease of disposal, cushioning, and the like. Alternatively, the core may be made of another material (for example, a synthetic resin). Moreover, what is called a coreless type adhesive tape roll formed by winding only the adhesive tape 12 in roll shape without using the winding core 14 may be sufficient. That is, in this invention, the core 14 is an arbitrary component to the last.

The adhesive tape 12 is provided with a gap 24 for cutting every approximately one length of the adhesive tape roll 10. The gap 24 is a cutting means used to make it easy to cut one end in the longitudinal direction of the adhesive tape 12 from the remainder, and for example, an array of long holes or corrugated slits, intermittent slits such as sewing eyes, and the like. And the like. In addition, in the example shown in FIG. 1, although the clearance gap 24 is provided along the width direction (direction orthogonal to a long direction) of the adhesive tape 12, you may be provided obliquely with respect to the width direction. In addition, in the example shown in FIG. 1, although the gap 24 is provided across the whole width of the adhesive tape 12, the gap 24 provided so that it may extend from one side of the width of the adhesive tape 12 to the middle may give an opportunity of cutting | disconnection. ) May be used.

Hereinafter, the structure of the adhesive tape 12 is demonstrated in detail. The adhesive tape 12 has a base material 20, an adhesive layer 33 provided on one side thereof, and a spacer portion 34 partially provided on the adhesive layer 33. The outer surface of the pressure sensitive adhesive layer 33 serves as the pressure sensitive adhesive surface 22. The spacer portion 34 protrudes outward from the adhesive face 32, and the other side (back side) of the substrate in the state where the adhesive tape 12 is wound in a roll shape (that is, the adhesive tape roll 10) ( The clearance is secured between 20B) and the adhesive face 32, and it is comprised so that the adhesive face 32 can be prevented from adhering to the back surface 20B (directly sticking).

As the base 20, a resin film, paper, fabric, rubber sheet, foam sheet, metal foil, a composite thereof, or the like can be used. Examples of the resin film include polyolefin (polyethylene, polypropylene, ethylene-propylene copolymer, etc.) film, polyester (polyethylene terephthalate, etc.) film, vinyl chloride resin film, vinyl acetate resin film, polyimide resin film, polyamide resin A film, a fluororesin film, cellophane, etc. are mentioned. Examples of the paper include paper, kraft paper, glassine paper, fine paper, synthetic paper, and overcoat paper. Examples of the fabric include woven fabrics and nonwoven fabrics made of various fibrous materials alone or in combination. Examples of the fibrous material include cotton, spun rayon, manila hemp, pulp, rayon, acetate fiber, polyester fiber, polyvinyl alcohol fiber, polyamide fiber, polyolefin fiber and the like. As an example of a rubber sheet, a natural rubber sheet, a butyl rubber sheet, etc. are mentioned. Examples of the foam sheet include foamed polyurethane sheets, foamed polychloroprene rubber sheets, and the like. Examples of the metal foil include aluminum foil and copper foil.

The base material 20 may have a single layer structure or a laminated structure. For example, in this embodiment, as shown in FIG. 2, the base material 20 of the structure by which the support layer 202 and the back layer 204 were laminated | stacked is used. The constituent material of the base material 20 includes various kinds of fillers (inorganic fillers, organic fillers, etc.), anti-aging agents, antioxidants, ultraviolet absorbers, light stabilizers, antistatic agents, lubricants, plasticizers, colorants (pigments, dyes, and the like) as necessary. An additive may be mix | blended.

As the base material 20 of the adhesive tape roll disclosed here, at least the back surface 20B can use preferably what comprised by the resin material (preferably polyolefin resin, for example, polyethylene resin). For example, the base material in which the resin film was laminated | stacked on the back of paper, the base material in which the resin material was melt-extruded-coated on the back of paper, a single film or a multilayer resin film, etc. can be used preferably.

20 A of one surface of the base material 20 may be surface-treated for improving the adhesiveness of the adhesive layer 33, such as a corona discharge process and application of a primer. Or you may use the base material 20 in which such surface treatment is not performed. The substrate 20 whose one side 20A is made of paper or woven fabric is advantageous from the viewpoint of cost and productivity because it is easy to secure good anchoring properties without requiring the surface treatment.

The back surface 20B of the base material 20 is subjected to a surface treatment (typically a peeling treatment for preventing the rewinding force from becoming too high) for adjusting the rewinding force of the adhesive tape roll 20 to an appropriate range such as application of a silicone-based release agent. You may be. Or you may use the base material 20 in which the said surface treatment is not given to the back surface 20B. The base material 20 in which the back surface 20B is comprised by the polyolefin resin (for example, polyethylene resin) at least does not require the said surface treatment (peeling process etc.) with the selection of the elastomer which comprises the spacer layer mentioned later. It is suitable for realizing the adhesive tape roll 20 which exhibits an appropriate rewind force. Therefore, use of the base material 20 of such a structure is advantageous from a viewpoint of cost, productivity, etc. As a particularly preferable base material 20, the support layer 202 is made of paper, a polyethylene resin film is laminated as the back layer 204, and peeled off the surface of the polyethylene resin film (back surface 20B of the base material 20). The base material 20 in which the process is not performed can be illustrated.

The thickness and width of the base material 20 can be appropriately selected according to the purpose, and are not particularly limited. In general, it is appropriate to set the thickness of the substrate 20 to about 30 µm to 300 µm (typically approximately 40 to 100 µm). Moreover, it is suitable to make the width | variety of the base material 20 about 1 cm-100 cm (typically about 3 cm-50 cm, for example, about 5-40 cm).

The adhesive layer 33 consists of an adhesive (SIS-type adhesive) which uses SIS as a base polymer. As the pressure-sensitive adhesive may be preferably used the same as known or common SIS-based pressure-sensitive adhesive in this kind of technical field. Such tackifiers generally contain SIS as a base polymer, tackifiers and process oils as main components. The type and compounding ratio of each component can be determined by the purpose of the adhesive tape roll (for example, in the adhesive tape roll for cleaning, whether the surface to be cleaned is plate attached, tile attached, tatami mat, carpet covering, or various May be set such that a desired adhesive performance (adhesive force, cohesive force, initial adhesiveness, etc.) is obtained according to the adhesive tape roll for the surface to be cleaned.

For example, various tackifying resins, such as rosin type, terpene type, hydrocarbon type, epoxy type, polyamide type, elastomer type, phenol type, ketone type, etc., may be used alone or as two or more kinds of tackifying resins for the pressure-sensitive adhesive. Can be used in combination. Although it does not specifically limit, The compounding quantity of tackifying resin with respect to 100 weight part of base polymers can be about 50-200 weight part, for example, and it is suitable to set it as about 80-150 weight part normally.

Moreover, as process oil for the said adhesive, process oils, such as a general paraffin type, a naphthene type, an aromatic type, can be used individually or in combination of 2 or more types, for example. Although it does not specifically limit, the compounding quantity of the process oil with respect to 100 weight part of base polymers can be made into about 50-200 weight part, for example, and it is suitable to set it as about 90-150 weight part normally.

In the technique disclosed herein, various additives such as anti-aging agent, antioxidant, ultraviolet absorber, light stabilizer, antistatic agent, lubricant, colorant (pigment, dye, etc.) may be further added to the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer. . The kind and compounding quantity of these additives can be made the same as the normal kind and compounding quantity in this kind of adhesive.

The SIS-based pressure-sensitive adhesive is a hot-melt type to melt the pressure-sensitive adhesive component to form an adhesive layer, an emulsion type to dry the aqueous dispersion of the pressure-sensitive adhesive component to form a pressure-sensitive adhesive layer, a solvent to dry the organic solvent solution of the pressure-sensitive adhesive component to form an adhesive layer Various types of adhesives, such as a mold, can be used. Especially, a hot melt adhesive is preferable.

The adhesive layer 33 may be formed in the whole range of one surface 20A of the base material 20, and the adhesive layer 33 may be formed in the range except one part. For example, as shown to FIG. 1, 2, you may have the non adhesion part (dry edge) 22 and 23 in which the adhesive layer 33 is not formed along the both ends of the width direction of the base material 20. FIG. . The width | variety of these non adhesion part 22, 23 can be about 1 mm-20 mm (typically 3-15 mm), respectively. The pressure-sensitive adhesive layer 33 is typically continuously formed (front coating) in the entire range of the base material 20 or in the range leaving the non-adhesive portion without spots.

The thickness (T1 of FIG. 2) of the adhesive layer 33 can be suitably set so that desired adhesive performance can be obtained according to the use of the adhesive tape roll 10. Usually, it is preferable to make thickness of the adhesive layer 33 into the range of about 5 micrometers-50 micrometers, and it is typically 5 micrometers-35 micrometers, for example, can be set to about 10 micrometers-20 micrometers.

The spacer portion 34 in the technique disclosed herein has the following conditions:

A polymer which is a non-acrylic polymer and different from the pressure-sensitive adhesive layer (ie, a polymer other than an acrylic polymer and other than SIS) is used as a base polymer; and

The storage modulus at 20 ° C. is in the range of approximately 1.6 × 10 ⁵ to 4.2 × 10 ⁵ Pa;

It is characterized by being composed of an elastomer that satisfies. In a preferred embodiment, the elastomeric storage modulus at 20 ° C. is in the range of approximately 2 × 10 ⁵ to 3 × 10 ⁵ Pa.

Here, the measurement frequency of the storage elastic modulus is 1 Hz. This storage modulus can be grasped by, for example, using a general viscoelasticity measuring device by setting a sample having a thickness of 2 mm on a parallel plate having a diameter of 25 mm and measuring at the frequency. What is necessary is just to set a measurement temperature range and a temperature increase rate suitably according to the model of a viscoelasticity measuring device, etc., and are not specifically limited. For example, as measurement temperature, it can be set as the temperature range (for example, -70 degreeC-150 degreeC) containing the range of 0 degreeC-30 degreeC at least, and a temperature increase rate is 0.5-5 degreeC / min (for example, For example, 2 ° C / min).

As the base polymer of the elastomer, various non-acrylic polymers for imparting an elastomer that satisfies the storage elastic modulus can be used. Use of a rubber polymer is preferable, and specific examples thereof include SBS, SEBS, CEBC, SEBC, and the like. Among them, CEBC is particularly preferable. Elastomers containing such base polymers and process oils and tackifying resins used as necessary as main components are preferred. The kind and compounding ratio of each component can be set so that the said storage elastic modulus can be adjusted to a desired range.

For example, process oils such as paraffin, naphthenic and aromatic may be used alone or in combination of two or more as the process oil for the elastomer. The storage modulus of the elastomer tends to increase when the amount of the process oil is reduced, and tends to decrease when the elastomer is increased. Therefore, by setting the compounding quantity of process oil suitably, the storage elastic modulus of an elastomer can be adjusted to a preferable range. Although it does not specifically limit, When employ | adopting a rubber polymer as a base polymer, the compounding quantity of the process oil with respect to 100 weight part of this base polymer can be made into about 90-150 weight part, for example.

Moreover, as said tackifying resin for elastomers, For example, various tackifying resins, such as a general rosin type, a terpene type, a hydrocarbon type, an epoxy type, a polyamide type, an elastomer type, a phenol type, and a ketone type, are used independently or two. It can use combining a species or more. Usually, the tackifying resin which is solid at normal temperature is used preferably. The storage modulus of the elastomer tends to increase when the blending amount of the tackifying resin is increased, and decrease when it decreases. Therefore, the storage elastic modulus of an elastomer can be adjusted to a preferable range by setting the compounding quantity of tackifying resin suitably. Although it does not specifically limit, the compounding quantity of tackifying resin with respect to 100 weight part of base polymers can be about 100 weight part or less, for example, and it is about 75 weight part or less (for example, about 5-75 weight part) Moreover, about 60 weight part or less (for example, about 40-60 weight part) may be sufficient. Or the elastomer of the composition which does not contain tackifying resin substantially may be sufficient.

In addition, the elastomer constituting the spacer portion 34 may contain a polymer other than the base polymer as a subcomponent in the polymer component. As said subcomponent, 1 type, or 2 or more types chosen from polymers other than SIS can be employ | adopted preferably. In other words, an elastomer having a composition substantially free of SIS is preferable. Moreover, the elastomer of the composition which does not contain polymer other than the said base polymer substantially may be sufficient.

In the technique disclosed herein, the elastomer constituting the spacer portion 34 is further formulated with various additives such as anti-aging agents, antioxidants, ultraviolet absorbers, light stabilizers, antistatic agents, lubricants, colorants (pigments, dyes, and the like). You may be. The kind and compounding quantity of these additives can be made the same as the normal kind and compounding quantity in this kind of adhesive. For example, by setting it as the elastomer of the composition containing a coloring agent, the shape and arrangement | positioning of the spacer part on an adhesion layer can be grasped | ascertained easily. This is advantageous, for example, in carrying out the process control in the process of forming the spacer portion (the process of producing the adhesive tape roll).

The planar shape, cross-sectional shape, and arrangement of the spacer portion 34 may be set so as to prevent the adhesion of the adhesive surface 32 directly to the other surface (back surface) 20B of the substrate 20. For example, an aspect in which a plurality of linear spacer portions are arranged substantially parallel to each other can be preferably employed. The planar shape of each linear spacer portion may be straight, curved, curved, wavy or the like. From a viewpoint of ease of manufacture, a linear spacer part is preferable. For example, the aspect in which the some linear spacer part extended along the longitudinal direction of an adhesive tape is arrange | positioned at stripe shape can be employ | adopted preferably. Since the adhesive tape sheet of such an aspect has the constant structure (cross-sectional shape) in each part of the longitudinal direction of an adhesive tape, there is little difference in the usability in the case of rolling the rewinding force and the surface to be cleaned in this longitudinal direction. desirable. That is, the said rewinding and transmission can be performed more smoothly.

The adhesive tape rolls disclosed herein are also substantially parallel to each other in a direction intersecting (typically orthogonal) with a first spacer group consisting of a plurality of linear spacer portions extending substantially parallel to one another in one direction. The aspect which has the 2nd spacer group which consists of the several linear spacer part which expands may be sufficient. For example, the first spacer group and the second spacer group may be arranged in a lattice shape. As another aspect of the adhesive tape roll disclosed here, the aspect by which the some plural-shaped spacer part was arrange | positioned along a predetermined pattern or is randomly illustrated.

When the shape of the spacer part 34 is linear, the width | variety (W1 of FIG. 2) of this line can be made into about 0.1 mm-1 mm, for example, It is preferable to set it as about 0.2 mm-0.5 mm normally. When the shape of the spacer part 34 is point shape, it is preferable to make the length of the short axis direction of this point into the said range. As shown in Figs. 1 and 2, in the aspect in which the plurality of linear spacer portions 34 are disposed substantially parallel to each other, the pitch (W2 in Fig. 2) of these linear spacer portions 34 is preferably substantially constant. For example, the said pitch can be made into about 0.5 mm-about 5 mm, and it is preferable to set it as about 1 mm-5 mm (for example, about 1 mm-3 mm) normally. It is preferable that such spacer portions 34 are arranged almost uniformly throughout the entire range where the pressure-sensitive adhesive layer 33 is provided.

Each spacer part 34 protrudes outward from the adhesive layer 33, and is formed. Protrusion height (T2 of FIG. 2) of the spacer part 34 from the surface of the adhesive layer 33 (namely, the adhesive surface 32) is usually suitably set to about 10 micrometers-200 micrometers, and is approximately 30 micrometers It is preferable to set it as -120 micrometers (for example, 55 micrometers-95 micrometers). In addition, a part of the lower part of the spacer part 34 may be below the adhesive face 32 (that is, the base material 20 side). The adhesive tape 12 of this aspect forms, for example, a spacer portion 34 along a pit formed in the adhesive layer 33 or from thereon while the adhesive layer 33 is in a state of continuously flowing. It can be manufactured by a method such as supplying an elastomer for forming a part. Moreover, it is preferable to make the protrusion height T2 of the spacer part 34 larger than the thickness T1 of the adhesive layer 33 (namely, T1 <T2).

The spacer portion 34 is formed so as to occupy a portion of 5% or more and 50% or less (more preferably 10% or more and 30% or less, for example, 15% or more and 20% or less) per unit area of the pressure-sensitive adhesive layer 33. It is preferable. If it is too small, the rewinding force may tend to be excessively high, and if it is too large, the adhesive force to the surface to be cleaned may be insufficient. By setting the area (occupancy) occupied by the spacer portion 34 per unit area of the pressure-sensitive adhesive layer 33 in the above range, it is possible to balance both the rewinding force and the adhesive force to the surface to be cleaned.

It is preferable that the adhesive tape roll disclosed here is formed so that the rewinding force in a rewinding speed of 1000 mm / min may become a range of about 0.2-2.5 N / 150 mm (for example, 0.3-2 N / 150 mm). The adhesive tape roll exhibiting this rewinding force is difficult to cause the above rail dragging phenomenon, and it is difficult to cause the outer circumferential edge to be naturally wound and peeled off during storage, and the outermost adhesive tape can be easily taken out (pulled off). As we can do it, handling is good.

In a preferable aspect, after storing this adhesive tape roll for 30 days at 23 degreeC, the said rewinding force exists in the range of about 0.5-2.5N / 150mm (more preferably 0.8-2N / 150mm). Since the adhesive tape roll which has such a characteristic is hard to produce | generate a rail drag phenomenon after the said storing, it is hard to produce the idea that the outer periphery edge is naturally wound up (peeled off) during storage, and also it is easy to pull out the outermost adhesive tape. The adhesive tape roll whose rewinding force exists in the said range also in any one of before and after storing on the said conditions is more preferable. Moreover, the adhesive tape roll whose change rate of the rewind force before and after storing on the said conditions is less than +/- 65% (typically within +/- 35%) is especially preferable. Here, the rewind force change rate is composed of a rewind force (initial rewind force) Fa before storage and a rewind force Fb after storage, and are calculated by the following equation: (Fb-Fa) / Fa × 100 (%); can do. In addition, as a measuring method of a rewind force, the method similar to the method described in the Example mentioned later can be employ | adopted.

The adhesive tape roll disclosed here rotates when the shaft angle of the jig | tool mentioned later is set to about 55 degrees, and is lightly rolled on the smooth plate adhesion surface (namely, on a general flooring material) at the speed | rate of 725 mm / sec. It is preferable to form so that a resistance value may become a range of about 5-15 N / 150 mm (for example, about 6-12 N / 150 mm). According to the adhesive tape roll which shows this rotational resistance value, since favorable usability is easy to be obtained, it is preferable. If the rotational resistance value is too low, there may be a case where the performance of capturing foreign matter on the surface to be cleaned is often insufficient. In addition, the feeling of contact with the hand when the roll is too weak may be difficult for the user to realize the cleaning effect. On the other hand, if the rotational resistance value is too high, an excessive burden is placed on the user, and a rail drag phenomenon may occur due to the balance with the rewinding force.

In a preferable embodiment, after storing this adhesive tape roll for 30 days at 23 degreeC, the said rotational resistance value exists in the range of about 5-15 N / 150 mm (for example, about 6-12 N / 150 mm). Since the adhesive tape roll which has such a characteristic is easy to obtain a favorable usability after the said storage, it is preferable. The adhesive tape roll whose rotational resistance value exists in the said range is more preferable in either before and after storing under the said conditions. The adhesive tape roll whose change rate of the rotational resistance value before and after storing on the said conditions is less than +/- 50% (typically within +/- 30%) is especially preferable. Here, the rotational resistance value change rate is composed of the rotational resistance value (initial rotational resistance value) Fc before storage and the rotational resistance value Fd after storage, and the following equation: (Fd-Fc) / Fc × 100 (%) It can calculate by; In addition, the method similar to the method described in the Example mentioned later can be employ | adopted as the measuring method of a rotational resistance value.

Hereinafter, although some Examples concerning this invention are described, it is not what intended limiting this invention to what is shown by this specific example. In addition, "part" and "%" in the following description are a basis of weight unless there is particular notice.

<Example 1>

The adhesive for adhesive layer formation and the resin material (spacer resin) for spacer part formation were extruded from the said die in the hot melt state using the twin screw extruder provided with the extrusion die, and were coated on one side of the base material. As a base material, the base material which laminated | stacked the polyethylene film of 20 micrometers in thickness on the other surface (surface on the opposite side to the surface on which the adhesive layer is formed, back surface) of 40 g of basis weight, 50 micrometers in thickness, and 80 mm in width was used. . Thereby, the adhesive tape 12 of the cross-sectional shape shown in FIG. 2 was produced. In this adhesive tape 12, the adhesive layer 33 is provided in the strip | belt shape of 70 mm in width center part of the base material 20. As shown in FIG. The thickness T1 of the adhesive layer 33 is 15 micrometers. On the adhesive layer 33, 29 linear spacer parts 34 which extend along the longitudinal direction of the adhesive tape 12 are provided in substantially constant pitch W2 (here, about 2 mm). The width W1 of each spacer part 34 is 0.37 mm, and the protrusion height T2 from the adhesion surface 22 is 70 micrometers. This adhesive tape 12 was wound up so that the adhesive face 32 might be outside, and the adhesive tape roll 10 was obtained.

3 and 4, the extrusion die used in this example is a slit-shaped first opening 71 and a plurality of (here, 29) point-like second openings arranged at regular intervals in parallel with the slit. Has 72. This extrusion die 70 is set so that the 1st opening 71 may be downstream and the 2nd opening 72 may be upstream with respect to the travel direction of the base material 20. Thereby, the base material 20 is extruded from the pressure-sensitive adhesive passage 75 and the spacer resin passage 76 arranged in parallel to the first opening 71 and the second opening 72, respectively, while extruding the pressure-sensitive adhesive and the spacer resin. It is comprised so that the adhesive layer 33 and the spacer part 34 formed in stripe shape on it can be formed at once by running.

As the pressure-sensitive adhesive for pressure-sensitive adhesive layer formation, SIS was used as a base polymer, and a SIS pressure-sensitive adhesive composed of 100 parts of this base polymer, 130 parts of tackifying resin, and 100 parts of process oil was used. As SIS, the brand name "Quintax 3520" of Xeon, Japan was used. As tackifying resin, the brand name "Escolet 1310" of Tonen Chemical Co., Ltd. was used. As a process oil, the brand name "Niprex 222B" of Japan Chemtech Co., Ltd. was used.

As a spacer resin, SIS was used as a base polymer, and the SIS type resin composition which consists of 100 parts of this base polymer, 20 parts of tackifying resin, and 100 parts of process oil was used. As SIS, the brand name "Quintax 3280" of Xeon, Japan was used. As tackifying resin, the brand name "Clearon P-105" of Yashara Chemical Co., Ltd. was used. As a process oil, the brand name "Niprex 222B" of Japan Chemtech Co., Ltd. was used.

<Example 2>

In this example, SBS was used as a base polymer as a spacer resin, and an SBS resin composition composed of 100 parts of this base polymer, 20 parts of tackifying resin, and 100 parts of process oil was used. As SBS, the brand name "Crayton D1155JP" of Creighton Polymer Japan Co., Ltd. was used. As tackifying resin, the brand name "YS resin TR105" of Yashara Chemical Co., Ltd. was used. As a process oil, the brand name "Niprex 222B" of Japan Chemtech Co., Ltd. was used. About other points, it carried out similarly to Example 1, and produced the adhesive tape roll.

<Example 3>

In this example, SEBS was used as the base polymer, and a SEBS resin composition composed of 100 parts of the base polymer, 20 parts of the tackifying resin, and 100 parts of the process oil was used. The brand name "Crayton D1657JP" of Creighton Polymer Japan Co., Ltd. was used as SEBS. As tackifying resin, the brand name "Clearon P-105" of Yashara Chemical Co., Ltd. was used. As process oil, the brand name "Diana process oil PW90" of Idemitsu Heungsan Co., Ltd. was used. About other points, it carried out similarly to Example 1, and produced the adhesive tape roll.

<Example 4>

In this example, CEBC was used as a base polymer as a spacer resin, and CEBC resin composition which consists of 100 parts of this base polymer, 20 parts of tackifying resin, and 100 parts of process oil was used. As CEBC, the brand name "Dynaron 6200P" of JSR Corporation was used. As tackifying resin, the brand name "Clearon P-105" of Yashara Chemical Co., Ltd. was used. As process oil, the brand name "Diana process oil PW90" of Idemitsu Heungsan Co., Ltd. was used. About other points, it carried out similarly to Example 1, and produced the adhesive tape roll.

<Example 5>

In this example, an APP resin composition consisting of amorphous polypropylene (APP) as a base polymer and 100 parts of the base polymer, 20 parts of tackifying resin and 100 parts of process oil was used as the spacer resin. As APP, the brand name "Tough Selenium 6532V" of Sumitomo Chemical Co., Ltd. was used. As tackifying resin, the brand name "Clearon P-105" of Yashara Chemical Co., Ltd. was used. As process oil, the brand name "Diana process oil PW90" of Idemitsu Heungsan Co., Ltd. was used. About other points, it carried out similarly to Example 1, and produced the adhesive tape roll.

<Example 6>

In this example, an amorphous polyα-olefin (APAO) was used as the base resin, and an APAO resin composition composed of 100 parts of the base polymer, 20 parts of tackifying resin, and 100 parts of process oil was used. As APAO, the trade name "Bestprist 750" by Degussa Corporation was used. As tackifying resin, the brand name "Clearon P-105" of Yashara Chemical Co., Ltd. was used. As process oil, the brand name "Diana process oil PW90" of Idemitsu Heungsan Co., Ltd. was used. About other points, it carried out similarly to Example 1, and produced the adhesive tape roll.

<Example 7>

In this example, an acrylic resin composition composed of 100 parts of the base polymer and 50 parts of the acrylic oligomer was used as the base polymer as the spacer resin. As an acrylic copolymer, the brand name "LA-2140e" of Kuraray Co., Ltd. was used. As an acryl-type oligomer, the brand name "Alfon UP-1000" of Dong-A Synthetic Co., Ltd. was used. About other points, it carried out similarly to Example 1, and produced the adhesive tape roll.

<Example 8>

In this example, EVA was used as a base polymer as a spacer resin, and an EVA resin composition composed of 100 parts of this base polymer and 50 parts of process oil was used. We used product name "EV-45X" of Toray Dupont Co., Ltd. in EVA. As process oil, the brand name "Diana process oil NS-90S" of Idemitsu Heungsan Co., Ltd. was used. In other respects, the adhesive tape roll was prepared in the same manner as in Example 1, but it was difficult to properly balance the melt viscosity and the curing (cooling) property of the adhesive, and the adhesive could not be applied to a desired thickness, and the like would flow out. The adhesive tape roll could not be obtained from the reason.

In addition, in the adhesives and spacer resins used in the production of the adhesive tape rolls in Examples 1 to 8, conventional antioxidants, ultraviolet stabilizers, and ultraviolet absorbers are used in usual amounts (here, about 3 parts in total with respect to 100 parts of base polymer). It is added. These additives do not have a substantial influence on the storage elastic modulus of the spacer resin related to each example or the characteristics (rewind force, rotational resistance value, etc.) of the adhesive tape roll.

The following evaluation was performed about the adhesive tape roll obtained by Examples 1-7 and the spacer resin used by Examples 1-8. The results are shown in Table 1.

[Save modulus]

The storage elastic modulus in 20 degreeC of the spacer resin which concerns on each case was measured using the viscoelasticity measuring apparatus and model ARES made from TA Instruments. That is, the spacer resin related to each example was shape | molded in the sheet form of thickness 2mm, it was made to match with the parallel plate of diameter 25mm, it was punched out, and it mounted on the chuck of the apparatus. Then, the temperature was increased from -70 ° C to 150 ° C at a temperature increase rate of 5 ° C / min while straining at a frequency of 1 Hz, and the storage modulus at 20 ° C was measured.

[Rewind force]

The adhesive tape roll (width 70mm of an adhesive layer) produced by each example was preserve | saved at 23 degreeC for 30 days from preparation. The adhesive tape roll after the storage is set in a tensile tester, and the tip of the adhesive tape is attached to a chuck of the tester in a measurement environment having a temperature of 23 ° C. and a relative humidity of 50%, and tensioned at a speed of 1000 mm / min. The adhesive tape roll was rewound in a tangential direction. The rewinding force at this time was converted into the value per width 150mm of an adhesive layer, and was shown in Table 1. Moreover, all the adhesive tape rolls of Examples 1-7 existed in the range of 0.5-2.5 N / 150 mm in rewind force immediately after preparation.

[ Rewind ]

With respect to the adhesive tape roll after storing under the above conditions, the tester holds the tip of the adhesive tape by hand and pulls it out in a tangential direction at a speed of about 1000 mm / minute to rewind due to the feeling of contact with the hand and peeling at this time. Evaluated. The result was combined with Table 1 and shown. ○ in Table 1 indicates that the rewinding property is good, △ is that the rewinding is slightly poor (slightly heavier or slightly lighter than the ideal hand touch), × is the rewinding ability ( Too heavy, or too light). Moreover, all the adhesive tape rolls concerning Examples 1-7 existed in the range of 0.5-2 N / 150 mm immediately after preparation, and showed favorable rewinding property.

[Rotation resistance and Feeling ]

The adhesive tape roll 10 after having stored on the said conditions to the rotating part 52 of the jig | tool 50 for adhesive tape rolls which has the schematic shape shown to FIG. 5, 6 was affixed. The tester gently grabs the grip 54 of the jig 50 under a measurement environment with a temperature of 23 ° C. and a relative humidity of 50% so that the angle θ between the shaft of the jig 50 and the bottom surface 56 is 55 °. , 725 mm / sec was moved over the smooth plate attachment surface (here plated floor) 56. At this time, the force (rotational resistance value) applied to the grip 54 was measured by the digital force gauge. The result was converted into the value per width 150mm of an adhesive layer, and was shown in Table 1. Moreover, the usability of the adhesive tape roll was evaluated by the feeling which touches the hand which the tester obtained at this time, and the result was combined with Table 1 and shown. In Table 1, ○ in the column indicating the feeling is that feeling is good, △ feels that the feeling is slightly poor (slightly heavier or slightly lighter than the ideal touch), × is feeling bad (too heavy, Or too light). In addition, in the adhesive tape roll which concerns on Examples 1-7, the rotational resistance value was in the range of 6-12 N / 150 mm immediately after manufacture, and also showed favorable usability.

As shown in Table 1, a polymer other than the SIS and the acrylic copolymer is used as the base polymer, and the storage modulus is 1.6 × 10 ⁵ to 4.2 × 10 ⁵ Pa (more specifically, 2 × 10 ⁵ to 3 × 10 ⁵ Pa The adhesive tape roll of Example 4 using the spacer resin in the range of) shows an appropriate rewind force (specifically, 0.5 to 2.5 N / 150 mm, more specifically 1 to 2 N / 150 mm) even after storage. Was good. The adhesive tape roll of Example 4 showed the appropriate rotational resistance value (specifically, 6-12 N / 150 mm, more specifically 8-10 N / 150 mm) even after storage, and the usability was favorable.

On the other hand, the adhesive tape roll which concerns on Example 1 using the spacer resin which uses SIS as a base polymer similarly to an adhesive layer was too high in rewind force and rotational resistance value after storage, and was also heavy in rewindability and usability. In Example 2 using a spacer resin having an acrylic copolymer as the base polymer, the measured value itself was a suitable range in the measurement of the rotational resistance value after storage, but the idea of shifting the spacer portion away from the pressure-sensitive adhesive layer to the plate surface (remaining) was shown. . In Examples 2 and 3 using a spacer resin having a polymer having a storage modulus of less than 1.6 × 10 ⁵ Pa as a base polymer, it was difficult to achieve both a rewind force and a rotational resistance value. In Examples 5 and 6 using a spacer resin containing a polymer having a storage modulus of greater than 10 × 10 ⁵ Pa as a base polymer, the rewinding force after storage was so great that the adhesive tape broke in the middle when the tester rewinds it (substrate destruction). There was a thing). Moreover, the adhesive tape roll which concerns on Examples 5 and 6 was too low in rotational resistance value, and was actually too light.

The adhesive tape which can stably maintain suitable rewind force and usability by employ | adopting the elastomer (spacer resin) whose non-acrylic-type polymer other than SIS as a base polymer and the storage elastic modulus in the said range as an elastomer which comprises a spacer part from the above is mentioned above. It was confirmed that a roll was realized.

Industrial availability

The adhesive tape rolls provided by the present invention can be preferably used in contact with the surfaces of various materials and properties to capture and remove foreign substances on the surfaces. For example, it is well suited for cleaning floors, furniture surfaces, shelves and the like. In particular, it is very suitable as an adhesive tape roll applied to the to-be-cleaned surface (plate-attached bottom surface etc.) whose surface is hard and smooth.

10 adhesive tape roll
12 adhesive tape
20 description
20A one side
20B other side (back)
202 support layer
204 back layer
24 break
32 adhesive side
33 pressure sensitive adhesive layer
34 spacer
50 fixtures
54 grips
70 extrusion die
71 first opening
72 second opening

Claims (6)

An adhesive tape having an adhesive face on one side of a substrate as an adhesive tape roll wound so that the adhesive face faces outward,
The pressure-sensitive adhesive tape is provided with a pressure-sensitive adhesive layer for forming the pressure-sensitive adhesive surface consisting of a pressure-sensitive adhesive having a styrene-isoprene-styrene block copolymer as a base polymer, and the pressure-sensitive adhesive surface is partially adhered to the other side of the substrate. And a spacer portion for blocking the thing
Here, the spacer portion has a non-acrylic polymer different from the pressure-sensitive adhesive layer as a base polymer, and the storage modulus at 20 ° C. measured at a frequency of 1 Hz is in the range of 1.6 × 10 ⁵ to 4.2 × 10 ⁵ Pa. The adhesive tape roll formed with the elastomer. The method according to claim 1,
The base polymer of the elastomer forming the spacer portion is styrene-butadiene-styrene block copolymer, styrene-ethylene / butylene-styrene block copolymer, crystalline polyolefin-ethylene / butylene-crystalline polyolefin block copolymer and styrene-ethylene Adhesive tape roll selected from the group consisting of / butylene-crystalline polyolefin block copolymer. The method according to claim 1 or 2,
And the elastomer forming the spacer portion is substantially free of styrene-isoprene-styrene block copolymer. The method according to any one of claims 1 to 3,
The adhesive tape roll whose rewinding force in the rewinding speed 1000 mm / min is 0.5-2.5 N / 150 mm after storing at 23 degreeC for 30 days. The method according to any one of claims 1 to 4,
The said spacer part is a linear shape of width 0.1mm-1mm, and is formed so that the protrusion height from the said adhesive layer may be 30 micrometers-120 micrometers. The method according to any one of claims 1 to 5,
An adhesive tape roll in which the said spacer part is linear along the longitudinal direction of the said adhesive tape, and the said some spacer part is provided in the pitch of 0.5 mm-5 mm.

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