JP2018176522A - Laminated nonwoven fabric and production method therefor, liquid impregnation sheet, liquid impregnated sheet, and face mask - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated nonwoven fabric that can suitably be used as a liquid impregnation sheet excellent in handleability when impregnated with liquid.SOLUTION: Provided is a laminated nonwoven fabric in which a surface layer having short fibers of a fiber length of 200 mm or less is arranged on both surface sides of a spunbond nonwoven fabric having V1/V2 of 1.5 or more when V1 is the volume of one bonded portion formed by bonding the fibers to each other and V2 is the volume of the fiber contained in the bonded portion, and the spunbond nonwoven fabric and the surface layer are integrated by entanglement of the fibers.SELECTED DRAWING: None

Description

  The present disclosure relates to a laminated non-woven fabric and a method for producing the same, a liquid, particularly a sheet for liquid impregnation for impregnating and using a cosmetic, and a liquid-impregnated sheet and a face mask impregnated with the liquid.

  Various sheets impregnated with a liquid, which are used to remove a predetermined substance from the skin of the human body or to apply the predetermined substance to the skin of the human body, have been proposed and put into practical use. In particular, in the field of beauty and cosmetics, it is used as a liquid-impregnated skin covering sheet (face mask used by sticking on a face, an eyebrow, elbow, knee, etc.) impregnated with a liquid containing an active ingredient (for example, a cosmetic) The demand for keratin care sheets is expanding. As a substrate of the liquid-impregnated skin covering sheet, a non-woven fabric mainly comprising hydrophilic fibers such as rayon is generally used.

  As a sheet impregnated with a cosmetic, a sheet having a structure in which a hydrophilic fiber and a hydrophobic fiber are combined has been proposed. For example, in Patent Document 1, a fiber having a structure of at least three layers composed of an inner layer composed of a fiber assembly mainly composed of hydrophobic fibers and a fiber assembly composed mainly of hydrophilic fibers made up of upper and lower layers A cosmetic impregnated sheet obtained by impregnating a cosmetic with a structure has been proposed. In Patent Document 2, a surface layer containing a predetermined amount or more of water-absorbent fibers is laminated on both surfaces of an inner layer containing a predetermined amount of heat-adhesive synthetic fiber and having a basis weight within a predetermined range, and an inner layer and a surface layer A substrate for impregnating a cosmetic composition has been proposed which is hydroentangled and is thermally bonded by a thermoadhesive synthetic fiber.

Unexamined-Japanese-Patent No. 2003-93152 Patent No. 4549056 gazette

  An object of the present disclosure is to provide a laminated non-woven fabric that can be suitably used as a liquid-impregnating sheet that is excellent in handleability when impregnated with a liquid.

The present disclosure is a spunbonded nonwoven fabric, and a laminated nonwoven fabric including a surface layer including short fibers having a fiber length of 200 mm or less, which are disposed on both sides of both surfaces of the spunbonded nonwoven fabric,
The spunbonded nonwoven fabric and the surface layer are integrated by interlacing fibers with each other,
In the spunbonded nonwoven fabric, V1 / V2 is 1.5 or more, where V1 is a volume of one bonded portion formed by bonding fibers, and V2 is a volume of fibers contained in the bonded portion.
Provided is a laminated non-woven fabric.

  The present disclosure also relates to a spunbonded nonwoven fabric having V1 / V2 of 1.5 or more, where V1 is a volume of one bonding portion where fibers are bonded and V2 is a volume of fibers contained in the bonding portion. A fiber web containing short fibers having a fiber length of 200 mm or less is disposed on both sides to produce a laminated fiber web, and the laminated web is subjected to an entanglement treatment to make the spunbonded nonwoven fabric and the short fiber web fibers The present invention provides a method for producing a laminated non-woven fabric, which comprises integrating by interlacing.

  According to the present embodiment, it is possible to obtain a laminated non-woven fabric which is relatively bulky and has good touch feeling, feel and the like while having excellent handleability in the state of being impregnated with a liquid. Therefore, when this is used as a liquid-impregnated sheet such as an anti-perspirant sheet or a face mask, the liquid-impregnated sheet can be obtained which is relatively difficult to be stretched and which is relatively difficult to be extracted during an extraction operation or an operation of unfolding from a folded state. .

(Circumstances leading to the present embodiment)
Since the sheet impregnated with liquid is applied to the skin of the human body, its touch feeling is naturally emphasized, but a relatively large force may be applied during its use, so machines such as strength etc. There is also a constant demand on the Specifically, the liquid-impregnated sheet is provided, for example, in a state of being stored in a pop-up manner like tissue paper, or wound in a roll and stored in a cylindrical container, and taken out at the outlet. Sometimes it is provided as a product that can be peeled off one by one. When using such products, relatively strong forces are likely to be applied when removing the sheet, which may result in stretching of the removed sheet, making it difficult to use.

  In addition, the face mask is generally provided in a container in a state where a plurality of sheets impregnated with a liquid are folded and folded one by one or collectively. Therefore, at the time of use, an operation of spreading the folded face mask is required. During this operation, if the face mask is stretched, the positions of the openings and incisions provided corresponding to the eyes, mouth, nose, etc. are shifted, making it difficult to paste the face mask on the face as prescribed. It can be

  The liquid-impregnated sheet is often composed mainly of hydrophilic fibers such as rayon or water-absorbent fibers so that the liquid can be sufficiently impregnated. However, in order to obtain a relatively strong non-woven fabric using only those fibers, in a non-woven fabric in which the fibers are entangled by high-pressure fluid flow, the fibers need to be strongly entangled, whereby the non-woven fabric The sense of feeling becomes hard.

  Therefore, as in Patent Documents 1 and 2, a configuration has been proposed in which an inner layer containing synthetic fibers is provided as a fiber layer for securing mechanical strength to a certain extent, and water-absorbent fibers are disposed as a surface layer. According to such a laminated structure, the mechanical strength of the whole nonwoven fabric can be raised to some extent. In particular, in the case where the inner layer is a spunbonded nonwoven fabric, the spunbonded nonwoven fabric itself has high strength and does not easily stretch, so the strength of the entire nonwoven fabric is significantly improved even if the inner layer is relatively small. It was thought to get.

  However, although the spunbond nonwoven fabric itself has high strength, when integrated with other fiber layers, for example, even if high-pressure fluid flow entangling treatment is performed, the fibers do not sufficiently entangle, and delamination occurs in the laminated nonwoven fabric. It is easy to occur. And, in order not to cause delamination, it was necessary to increase the pressure of the fluid flow. As a result, the texture and softness of the resulting laminated nonwoven fabric were also impaired, and it was not possible to obtain one suitable for use as a liquid-impregnated sheet.

Then, when the present inventors further examined, when the degree of adhesion of the fibers in the adhesion part is smaller as the spun bond non-woven fabric, the fibers are excellent in the structure in which the fiber layer is disposed on the surface. It has been found that entanglement hardly causes delamination. That is, by arranging fiber layers containing short fibers above and below such a spunbonded nonwoven fabric and applying a high pressure fluid flow, even if the pressure of the high pressure fluid flow is relatively low, It has been found that the fiber layer is entangled to such an extent that delamination does not easily occur, and a nonwoven fabric having a relatively good overall feeling can be obtained.
Hereinafter, the laminated non-woven fabric of the present embodiment will be described.

(Spunbond nonwoven fabric)
The laminated nonwoven fabric of the present embodiment is a laminated nonwoven fabric including a spunbond nonwoven fabric and a surface layer containing short fibers respectively disposed on the side of both surfaces of the spunbond nonwoven fabric, and the spunbond nonwoven fabric, and the surface layer Are united by interlacing fibers, and in a spunbonded nonwoven fabric, when the volume of one bonding portion formed by bonding the fibers is V1 and the volume of fibers contained in the bonding portion is V2, V1 It is a laminated nonwoven fabric in which / V2 is 1.5 or more. Here, first, a spunbond nonwoven fabric will be described.

  A spunbond nonwoven fabric is a nonwoven fabric which is constituted by a long fiber which consists of synthetic resins, and fibers were united by an adhesion part. The bonding portion is a dense portion of fibers in which the fibers are bonded to one another by a material (resin) constituting the fibers. In the present embodiment, a spunbonded nonwoven fabric is preferably used which has a relatively small basis weight and relatively weak adhesion by the bonding portion, and hence a relatively low degree of fiber density in the bonding portion.

In this embodiment, V1 / V2 which is a ratio of the volume V1 of one bonded portion to the volume V2 of the fibers contained in the bonded portion is used to indicate the degree of density of fibers in the bonded portion. The volume V1 of the bonding portion can be obtained by determining the area and thickness of the bonding portion from an electron micrograph and multiplying them. The volume (volume occupied by the fibers) of the fibers contained in the bonding portion is calculated from the basis weight, the fineness and the fiber diameter of the non-woven fabric. More specifically, one of the fibers contained in the bonded portion is based on the fineness of the fiber (dtex: weight per 10,000 m (g)) and the fabric weight (weight of the non-woven fabric per 1 m ² (g)) Assuming that it is a fiber of (1), the total length (mm) of the fiber contained in the bonding portion of volume V1 is calculated. The volume V2 of the fibers contained in the bonded portion of the volume V1 can be determined by multiplying the total length of the determined fibers by the cross-sectional area determined from the fiber diameter.

If V1 / V2 = 1, there is no void at all in the bonding portion, and the fibers fill the bonding portion without gaps. As V1 / V2 increases, more voids are formed between the fibers. The more voids there are, the weaker the adhesion at the bond will be.
In addition, when obtaining V1 / V2, in a region of 20 cm long and 20 cm wide, select four bonded portions located near each vertex of the region, calculate V1 / V2 by calculating V1 and V2 for these. Further, the average value of V1 / V2 calculated is determined.

  In the spunbond nonwoven fabric, as V1 / V2 increases, the fibers in the non-bonded portion located between the bonded portion and the bonded portion move more easily due to the smaller degree of bonding between the fibers in the bonded portion. It is considered that the fibers of the surface layer are easily entangled. Thus, in the present embodiment, even if the pressure of the high-pressure fluid flow is made relatively small and the degree of entanglement of the fibers is lowered, the fibers are appropriately entangled and it is considered that delamination hardly occurs. Although the strength (for example, breaking strength) of the spunbonded nonwoven fabric decreases as V1 / V2 increases, the strength improvement effect of the spunbonded nonwoven fabric can not be appropriately obtained unless the surface layer and the spunbonded nonwoven fabric are integrated. In consideration of this, in the present embodiment, the value of V1 / V2 is set to 1.5 or more to give priority to the prevention of the delamination.

  V1 / V2 is preferably 1.8 or more, more preferably 2.1 or more, particularly preferably 2.5 or more, and most preferably 3.0 or more. When the value of V1 / V2 is less than 1.5, the degree of fiber density in the bonded portion is large, and delamination easily occurs. The upper limit of the value of V1 / V2 is, for example, 10.0, in particular 7.0, and more particularly 5.0. If the value of V1 / V2 is too large, the adhesion of the fibers to each other at the bonded portion may be insufficient, and the reinforcing effect of the spunbonded nonwoven fabric may not be obtained.

  In the spunbonded nonwoven fabric used in the present embodiment, t1 / t2 is 0.070 or more, where t1 is the thickness of the bonded portion where the fibers are bonded and t2 is the thickness other than the bonded portion. Preferably, it is a spunbonded nonwoven fabric. The strength of adhesion by the adhesive part also appears in the thickness of the adhesive part, and the smaller the thickness of the adhesive part, the stronger the adhesion is.

  More specifically, in the spunbond nonwoven fabric used in the present embodiment, when the thickness of the bonded portion formed by bonding the fibers is t1, and the thickness of the portion other than the bonded portion is t2, t1 / n. It is preferable that it is a spun bond nonwoven fabric whose t2 is 0.070 or more. The t1 / t2 of the spunbonded nonwoven fabric is more preferably 0.075 or more, and most preferably 0.080 or more. The upper limit of t1 / t2 is less than 1, especially 0.095, more particularly 0.090, and even more particularly 0.085. When t1 / t2 is 1, there is no substantial difference between the bonded portion and the non-bonded portion. Therefore, when t1 / t2 is 1 or more, the reinforcing effect by the spunbond nonwoven fabric can not be obtained. is there.

  The long fibers constituting the spunbonded nonwoven fabric are, for example, polyester resins such as polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyethylene naphthalate, polylactic acid, polybutylene succinate, and copolymers thereof, polypropylene, polyethylene Polyolefins (including high density polyethylene, low density polyethylene, linear low density polyethylene, etc.), polybutene-1, ethylene-propylene copolymer, ethylene-vinyl alcohol copolymer, and ethylene-vinyl acetate copolymer It consists of resin arbitrarily selected from polyamide resin, such as base resin, nylon 6, nylon 12 and nylon 66.

  The long fibers of the spunbonded nonwoven fabric are preferably made of a polyester resin such as polyethylene terephthalate. Since a spunbonded nonwoven fabric made of fibers of a polyester resin is slightly more hydrophilic than a fiber made of fibers of an olefin resin, the liquid may be easily impregnated into the sheet.

  The long fiber may be a single fiber made of one resin or a mixture of a plurality of resins, or may be a composite fiber made of a plurality of components. The long fiber which is a composite fiber may be, for example, a core-sheath type composite fiber composed of a core component and a sheath component. In addition, the spunbonded nonwoven fabric may be composed of two or more types of long fibers.

  The fineness of the long fibers constituting the spunbonded nonwoven fabric may be, for example, 0.5 dtex to 7.0 dtex, in particular 1.0 dtex to 4.0 dtex, and more particularly 1.2 dtex to 2.5 dtex. May be there.

Spunbond basis weight of nonwoven fabrics, for example, 5g / m ² ~30g / m may be ^2, it may be a particularly ^{6g / m 2 ~20g / m 2} , more particularly 7 g / m ² to 15 g / m ² It may be. A spunbond nonwoven fabric having a weight per unit area in this range is likely to be appropriately entangled with the surface layer, and tends to give a laminated nonwoven fabric which is less likely to cause delamination.

  The spunbond non-woven fabric may for example have a thickness of 0.05 mm to 0.20 mm, in particular 0.08 mm to 0.17 mm, more particularly 0.10 mm to 0.15 mm. .

  Spunbond nonwovens have an elongation at break of 1% to 30%, in particular 2% to 20%, more particularly 3% to 15%, even more particularly 4 to 10% in the MD direction In the CD direction, it may have a breaking elongation of 2% to 50%, in particular of 3% to 30%, more particularly of 4% to 20%.

  In the present embodiment, a spunbonded nonwoven fabric having a stress at 10% elongation of 30 N / 5 cm or less in the MD direction is preferably used. The stress at 10% elongation in the MD direction is more preferably 20 N / 5 cm or less, still more preferably 15 N / 5 cm or less. The lower limit of the stress at 10% elongation in the MD direction is, for example, 1.0 N / 5 cm, in particular 3.0 N / 5 cm, and more particularly 5.0 N / 5 cm. In a spunbond nonwoven fabric having a stress at 30% elongation of 30 N / 5 cm or less in the MD direction, V1 / V2 may be less than 1.5, and even in that case, the degree of adhesion of the spunbond nonwoven fabric is with the surface layer It is weak and suitable for integration. Further, in the present embodiment, a spunbonded nonwoven fabric having a stress at 10% elongation of 7.0 N / 5 cm or less in the CD direction is preferably used. The stress at 10% elongation in the CD direction is more preferably 4.0 N / 5 cm or less, still more preferably 2.7 N / 5 cm or less. The lower limit of the stress at 10% elongation in the CD direction is, for example, 0.5 N / 5 cm, in particular 1.0 N / 5 cm, and more particularly 1.5 N / 5 cm.

  The spunbonded nonwoven fabric used in the present embodiment is preferably one having no stretchability in any direction. The term "elasticity" as used herein means that the elongation elastic modulus at 20% elongation measured according to JIS L 1096: 2010 8.15.1 is 50% or more. In addition, when the breaking elongation is less than 20%, in the said direction, it shall not have stretchability. When the spunbond nonwoven fabric is stretchable, processing becomes difficult when processing the laminated nonwoven fabric as a sheet for liquid impregnation into a face mask (for example, when punching it according to the shape of the face) is there.

(Surface layer)
Next, the surface layers disposed on both sides of the spunbonded nonwoven fabric will be described.
The surface layer contains short fibers having a fiber length of 200 mm or less and is not a spunbond nonwoven. The surface layer preferably contains 50% by mass or more of short fibers. When the proportion of the short fibers is 50% by mass or more, the texture of the non-woven fabric is softened, and the touch feeling is easily improved. The surface layer preferably contains 70% by weight or more of short fibers, more preferably 80% by weight or more, still more preferably 90% by weight or more, and most preferably consists of only short fibers.

  The staple fibers have a fiber length of 200 mm or less. The fiber length of the short fibers may be, for example, 10 mm or more and 100 mm or less, particularly 25 mm or more and 100 mm or less, more particularly 30 mm or more and 70 mm or less, and still more particularly 35 mm or more and 65 mm or less. It is selected appropriately. The surface layer may contain short fibers having different fiber lengths.

  The fibers constituting the surface layer are not particularly limited. For example, natural fibers such as pulp, hemp, silk and wool (except cotton), viscose rayon, cupra, and solvent-spun cellulose fibers (eg lentigliocell (registered trademark) It is optionally selected from regenerated fibers such as trademarks and Tencel (registered trademark), and synthetic fibers and the like.

  Resins constituting synthetic fibers include polyester resins such as polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polyethylene naphthalate, polylactic acid, polybutylene succinate and copolymers thereof, polypropylene, polyethylene (high density polyethylene (high density polyethylene, Polyolefin resins such as low density polyethylene, linear low density polyethylene, etc., polybutene-1, ethylene-propylene copolymer, and ethylene-vinyl acetate copolymer, nylon 6, nylon 12 and nylon 66 Plastics, acrylic resins, polycarbonates, polyacetals, engineering plastics such as polystyrenes and cyclic polyolefins, and their elastomers. That.

  The synthetic fibers contained in the surface layer may be single fibers (fibers having a fiber cross section consisting of one section) or composite fibers (fibers having a fiber cross section having two or more sections). When it is a composite fiber, the composite form may be any of core-sheath (including concentric and eccentric), split, side-by-side and sea-island types. The synthetic fiber may be a single fiber or a composite fiber, and the cross-sectional shape of the fiber (peripheral shape) may not be circular, for example, an oval, a Y, a well, a polygon, Alternatively, it may have a cross section (atypical cross section) other than a circle such as a star. A fiber having a recess in the outer periphery of the cross section, such as Y-shaped, well-shaped, polygonal or star-shaped, may easily retain liquid in the recess, and may enhance the liquid retention of the surface layer.

  The surface layer preferably contains hydrophilic or water-absorbing fibers so as to be capable of retaining a sufficient amount of liquid, for example, cellulose fibers are preferable, viscose rayon, cupra, and solvent-spun cellulose fibers (for example, lentin lyocell It is particularly preferred to include regenerated fibers such as registered trademarks) and Tencel®. The surface layer may contain, for example, 20% by mass or more, particularly 50% by mass or more, more particularly 70% by mass or more, still more particularly 90% by mass or more of cellulose fibers, or may be composed of only cellulose fibers.

  The fineness of the cellulose fibers contained in the surface layer may be, for example, about 0.1 dtex to 6 dtex, and particularly about 0.3 dtex to 3.5 dtex. Cellulose fibers with a fineness within this range are suitable for securing the flexibility of the entire laminated nonwoven fabric. When the fineness of a cellulose fiber is too small, the card | curd passage property at the time of manufacturing a fiber web may deteriorate, and productivity of a nonwoven fabric may fall. When the fineness of the cellulose fiber is too large, the nonwoven fabric becomes rough and the touch may be lowered.

  Alternatively, the surface layer may comprise fibers derived from splittable bicomponent fibers. The "fiber derived from splittable composite fiber" means a single fiber consisting of only one section before splitting and a fiber consisting of two or more sections, which is formed by splitting of the splittable composite fiber This refers to a fiber in which a part of the splittable conjugate fiber is split, but not split at all in the other part. Alternatively, as long as one splittable conjugate fiber may not be split at all as long as the non-woven fabric includes fibers formed by splitting of the splittable conjugate fiber, such splits are not split at all Type composite fibers are also included in fibers derived from split type composite fibers.

  Specifically, in the splittable conjugate fiber, at least one component of the constituent components is divided into two or more in the fiber cross section, at least a part of the constituent components is exposed on the fiber surface, and the exposed portion is the fiber It has a fiber cross-sectional structure formed continuously in the longitudinal direction. The splittable conjugate fiber may be a box-shaped section arranged in a chrysanthemum shape. Alternatively, the splittable conjugate fiber may be one in which the sections are arranged in layers in the fiber cross section. In addition, the splittable composite fiber may be a so-called solid split composite fiber having no hollow portion continuous in the longitudinal direction when observing the fiber cross section, or one or more hollows continuous in the longitudinal direction It may be a so-called hollow splittable composite fiber having a portion.

  The combination of components (resins) constituting the splittable conjugate fiber is, for example, polyethylene terephthalate / polyethylene, polyethylene terephthalate / ethylene-propylene copolymer, polypropylene / polyethylene etc. (polyethylene is high density polyethylene, low density polyethylene, And any one or a combination of linear low density polyethylenes).

  The fineness of the splittable conjugate fiber gives an ultrafine fiber having a fineness of 0.6 dtex or less, preferably 0.5 dtex or less when divided into each component (that is, when each section is one fiber). If it is a thing, it will not specifically limit. In the present embodiment, when the surface layer contains ultrafine fibers as fibers derived from the splittable conjugate fiber, the non-woven fabric becomes soft and the liquid is good due to the fine gaps formed between the ultrafine fibers. Will be held by

  In order to generate such ultrafine fibers, the fineness of the splittable conjugate fiber is preferably 1 dtex or more and 9 dtex or less, more preferably 1.5 dtex or more and 3.5 dtex or less, and still more preferably , 1.5 dtex or more and 2.5 dtex or less. In addition, the number of divisions into each component in the splittable conjugate fiber (that is, the number of sections in the conjugate fiber) is, for example, preferably 4 or more and 32 or less, and more preferably 4 or more and 20 or less. Most preferably, it is 6 or more and 10 or less. The lower limit of the fineness of the ultrafine fibers is not particularly limited, but is preferably 0.05 dtex or more.

  The fiber derived from the splittable conjugate fiber may be contained in the surface layer at 10% by mass or more, particularly 30% by mass or more, more particularly 50% by mass or more. The upper limit of the content of fibers derived from the splittable conjugate fiber is, for example, 90% by mass, and particularly 70% by mass. If the proportion of fibers derived from splittable composite fibers is too small, the effect of the surface layer containing microfibers may not be obtained. If it is too large, the non-woven fabric becomes flexible and elongation occurs at the time of cutting and processing For example, the processability may be reduced. In addition, since the splittable conjugate fiber is a kind of synthetic fiber, when the proportion of fibers derived therefrom is too large, it may be difficult to retain the liquid, and it may be difficult to impregnate or permeate a predetermined amount of liquid.

  Alternatively, the surface layer may contain synthetic fibers not derived from splittable conjugate fibers. Such synthetic fibers are, for example, single fibers, core-sheath composite fibers, side-by-side composite fibers, and sea-island composite fibers. The fineness of such a synthetic fiber is not particularly limited, and is, for example, not less than 0.6 dtex and not more than 6 dtex, particularly not less than 0.8 dtex and not more than 4.8 dtex, more particularly not less than 1.2 dtex and not more than 1 .5 dtex or more and 2.5 dtex or less.

  Alternatively, the surface layer may comprise cellulose fibers and synthetic fibers (especially splittable composite fibers). In that case, the cellulose fiber may be contained in the surface layer, for example, 20% by mass to 90% by mass, particularly 30% by mass to 70% by mass, and the synthetic fiber is, for example, 10% by mass to 80% in the surface layer %, Especially 30% by mass to 70% by mass.

Basis weight of the surface layer may be, for example, ^{5g / m 2 ~50g / m 2} , in particular be a ^{10g / m 2 ~45g / m 2} , more particularly at 15g / m ² ~40g / m ² May be there. If the surface weight of the surface layer is too small, the texture of the entire laminated nonwoven fabric may decrease, and if the weight is too large, the degree of integration with the spunbond non-woven material tends to be weak and peeling tends to occur between layers. is there.

  The surface layers respectively located on both sides of the spunbonded nonwoven fabric may be the same or different. For example, the basis weight of one surface layer may be greater than the basis weight of the other surface layer, or the percentage of regenerated fibers in one surface layer may be greater than that in the other surface layer. Alternatively, both surface layers may be different from each other in two or more parameters selected from the basis weight, fiber type, specific fiber ratio, fineness and the like.

[Configuration etc. of whole laminated nonwoven fabric]
In the laminated nonwoven fabric of the present embodiment, the surface layer is disposed on the side of both surfaces of the spunbond nonwoven fabric, and the spunbond nonwoven fabric and the surface layer are integrated by interlacing fibers with each other. . In the laminated nonwoven fabric, the surface layer may be composed of two or more layers. For example, the side closer to the spunbonded nonwoven fabric may be a layer containing only regenerated fibers or a larger proportion of regenerated fibers, and the side further away may be a layer containing only fibers derived from splittable composite fibers or a greater proportion of the fibers.

  The entanglement of the fibers of the spunbond nonwoven fabric and the fibers of the surface layer may be realized, for example, by high-pressure fluid flow treatment or needle punch treatment. When the degree of integration of the spunbond nonwoven fabric and the surface layer, that is, the degree of interlacing of the fibers is too weak, peeling easily occurs between the surface layer and the spunbond nonwoven fabric, and the handleability is reduced. On the other hand, when the degree of integration of the spunbond nonwoven fabric and the surface layer is too strong, peeling becomes difficult to occur, but the texture becomes hard.

  In the present embodiment, by using the spunbond nonwoven fabric having V1 / V2 of 1.5 or more as described above, even if the degree of interlacing between the fibers is relatively weak (for example, in the entanglement treatment by high-pressure fluid flow) When the fluid pressure is reduced, it is possible to obtain a laminated non-woven fabric which is less likely to cause delamination. Specifically, in the laminated nonwoven fabric of the present embodiment, the peel strength in the MD direction between the spunbond nonwoven fabric and the surface layer is, for example, 1.5 N or more, particularly 2.5 N or more, more particularly 3.0 N or more In addition, the degree of entanglement between fibers may be relatively weak and the tactile sensation may be provided as soft.

  The upper limit of the peel strength in the MD direction of the laminated nonwoven fabric of the present embodiment is, for example, 20 N. It may be difficult to obtain a soft laminated nonwoven having a peel strength of more than 20 N and a texture even when using the above-mentioned specific spunbonded nonwoven. The peel strength in the MD direction of the laminated nonwoven fabric of the present embodiment may be, for example, 2.5 N to 15 N, and particularly 3.0 N to 10 N.

In the laminated nonwoven fabric of the present embodiment, when the surface layer is made of only cellulose fibers, more preferably, when the surface layer is made of only regenerated fibers, the peel strength of the laminated nonwoven fabric in the MD direction is preferably 2.7N to 10N. And 3.0 N to 7.0 N are more preferable.
In the laminated nonwoven fabric of the present embodiment, when the surface layer contains 10% by mass or more of fibers derived from the splittable conjugate fiber, the peel strength in the MD direction of the laminated nonwoven fabric is preferably 6.0 N to 20 N, 6.5 It is more preferable that it is -11N.

  The softness of the texture of the laminated non-woven fabric of the present embodiment, or the softness thereof can be indicated by, for example, the bending resistance measured using a handle ometer. Specifically, the laminated nonwoven fabric of the present embodiment has a bending resistance of 0.30 N to 1.50 N in a dry state, in particular 0.40 N to 1.30 N, more particularly 0.50 N to 1.20 N. May have a stiffness of Although the bending resistance may change depending on the sheet weight of the sheet, according to the present embodiment, the bending resistance of the above range is selected by appropriately selecting the sheet weight of the laminated nonwoven fabric using the above-mentioned specific spunbonded nonwoven fabric. The laminated nonwoven fabric which has it can be provided.

  In addition, the laminated nonwoven fabric of the present embodiment has a bending resistance of 0.40 N to 1.10 N, particularly 0.50 N, which is measured in a wet state in which 500 parts by mass of water is impregnated with 100 parts by mass of the laminated nonwoven fabric. It may be ~ 0.95 N, more particularly 0.60 N to 0.90 N. The softness of the laminated nonwoven fabric of the present embodiment is exhibited even in the state of being impregnated with a liquid.

Basis weight of the laminated nonwoven fabric of the present embodiment is suitably selected in accordance with the application etc., for example, be ^{25g / m 2 ~100g / m 2} , it may be a particularly ^{30g / m 2 ~90g / m 2} , more in particular it may be a ^{35g / m 2 ~80g / m 2} . When using laminated nonwoven fabric of the present embodiment as a face mask, the basis weight may be, for example, ^{30g / m 2 ~90g / m 2} , may be a particularly 35g / m ² ~85g / m ² , more particularly it may be a ^{40g / m 2 ~80g / m 2} .
If the weight per unit area is too small, the amount that can be impregnated with the liquid may decrease. When the basis weight of the laminated nonwoven fabric is large, either the basis weight of the spunbond nonwoven fabric or the basis weight of the surface layer is large, but in the former case, the texture of the entire laminated nonwoven fabric tends to be hard, and in the latter case Peel strength tends to be smaller.
The ratio of the basis weight of the laminated nonwoven fabric to the basis weight of the spunbond nonwoven fabric (the basis weight of the laminated nonwoven fabric / the basis weight of the spunbond nonwoven fabric) of the laminated nonwoven fabric of this embodiment is preferably 2.5 or more, and 3.0 or more. Is more preferably 4.0 or more, and particularly preferably 5.5 or more. When the lower limit of the basis weight ratio is the above-described value, the touch feeling, the liquid holding property, and the like of the surface layer can be easily improved. The ratio of the basis weight of the laminated non-woven fabric to the basis weight of the spunbond non-woven fabric is preferably 10 or less, more preferably 9.0 or less, and still more preferably 8.0 or less. When the upper limit of the basis weight ratio is the above-mentioned value, delamination is unlikely to occur, and the handleability of the laminated nonwoven fabric can be easily improved.

Specific volume of the laminated nonwoven fabric of the present embodiment, for example, be a 10.0cm ³ /g~13.0cm ³ / g, in particular 10.5cm ³ /g~12.5cm ³ / g, in particular more 11 .0cm ³ may be a /g~12.0cm ³ / g. The specific volume can be determined from the basis weight and thickness of the laminated non-woven fabric, where the thickness of the laminated non-woven fabric is to be measured under a load of sample 294 Pa. In the laminated nonwoven fabric of the present embodiment, the degree of interlacing between the fibers is relatively weak, so it is likely to have a relatively large specific volume. A laminated nonwoven fabric having a large specific volume tends to give a soft touch and can hold a relatively large amount of liquid in the space between fibers.

  The laminated nonwoven fabric of the present embodiment may have, for example, a breaking elongation in the MD direction of 30% to 100%, in particular 35% to 80%, and more particularly 40% to 70%. The breaking elongation in the CD direction may be 30% to 160%, in particular 50% to 140%, and more particularly 70% to 120%. In addition, the laminated nonwoven fabric of the present embodiment may have, for example, a breaking strength in the MD direction of 20 N / 5 cm to 180 N / 5 cm, particularly 30 N / 5 cm to 160 N / 5 cm, and more particularly 40 N / 5 cm to It may be 150 N / 5 cm, the breaking strength in the CD direction may be 5 N / 5 cm to 60 N / 5 cm, in particular 10 N / 5 cm to 50 N / 5 cm, more particularly 17 N / 5 cm to 40 N / 5 cm May be there.

  In the laminated nonwoven fabric of the present embodiment, for example, the stress at 10% elongation in the MD direction may be 1N / 5 cm to 50 N / 5 cm, in particular 5 N / 5 cm to 40 N / 5 cm, and in particular, The stress at 10% elongation in the CD direction may be 1 N / 5 cm to 20 N / 5 cm, in particular 2 N / 5 cm to 15 N / 5 cm, more particularly 2 It may be 5 N / 5 cm to 10 N / 5 cm.

  The spunbond nonwoven fabric constituting the laminated nonwoven fabric of the present embodiment has a relatively low degree of pressure bonding and relatively low mechanical strength, but when integrated with the surface layer, the short fibers and the long fibers are relatively strong. In order to intertwine, a sheet having a relatively large mechanical strength is provided.

[Method of producing laminated non-woven fabric]
In the laminated nonwoven fabric of the present embodiment, a fiber web (hereinafter referred to as “short fiber web”) containing short fibers to be a surface layer is disposed on both surfaces of a spunbond nonwoven to create a laminated fiber web, and this lamination is carried out The fiber web can be manufactured by a manufacturing method including an entanglement treatment to integrate the fibers by entanglement of the fibers. In the spunbond non-woven fabric, as described above, V1 / V2 is 1.5 or more, where V1 is the volume of one bonded portion where fibers are bonded and V2 is the volume of fibers contained in the bonded portion. It is.
The staple fiber web can be produced by a known method. The form of staple fiber web may be any form of parallel web, cross web, carded web such as semi-random web and random web, air-laid web, and wet papermaking web. The staple fiber webs disposed on both sides of the spunbond nonwoven may be different from one another, for example, one may be a parallel web and the other a semi-random web.

  The interfiber interlacing process is preferably a high pressure fluid flow interlacing process that injects a high pressure fluid stream. The high pressure fluid is, for example, a high pressure gas such as compressed air and a high pressure liquid such as high pressure water. In the production of non-woven fabrics, the hydroentanglement treatment using high pressure water as the high pressure fluid is often used, and the hydroentanglement treatment is preferably used also in this embodiment from the viewpoint of ease of implementation and the like. Below, the manufacturing method at the time of using high pressure water (it is also only called a "water flow" in the following) as a high pressure fluid is demonstrated.

  The hydroentangling process may be carried out, for example, by placing the laminated fiber web on a plain weave support of 80 mesh to 100 mesh and injecting a water flow to the web. The hydroentangling process uses water pressure of 1MPa to 15MPa from the nozzle provided with an orifice with a hole diameter of 0.05mm to 0.5mm at an interval of 0.3mm to 1.5mm to the front and back of the web respectively 1 to 5 You may implement by injecting each time. The water pressure is preferably 1 MPa to 10 MPa, more preferably 1 MPa to 7 MPa. The distance between the nozzle and the web may for example be 5 mm to 100 mm, in particular 10 mm to 50 mm. Also, the transport speed of the web on the support may be, for example, 2 m / min to 6 m / min.

  The laminated nonwoven fabric obtained by the hydroentanglement treatment is subjected to a drying treatment. The drying process may be performed using, for example, a hot-air penetrable heat treatment machine (also referred to as an air-through heat processing machine), a hot-air blowing heat treatment machine, an infrared heat treatment machine, or the like.

[Use of laminated nonwoven fabric]
The laminated non-woven fabric of the present embodiment may be used as a liquid-impregnated sheet which is impregnated with a liquid and used in contact with human or animal skin. The liquid and the amount thereof impregnated are appropriately selected according to the application. The liquid may be impregnated at an impregnation amount of, for example, 600 parts by mass or more and 2500 parts by mass or less with respect to 100 parts by mass of the non-woven fabric, and in particular may be impregnated at an impregnation amount of 600 parts by mass or more and 1500 parts by mass or less May be impregnated at an impregnation amount of 700 parts by mass or more and 1500 parts by mass or less.

  For example, when the liquid-impregnated sheet is used as a wiping sheet for removing stains from human skin, 100 parts by mass or more and 1000 parts by mass or less of water, an aqueous solution containing cleaning components, etc. The impregnation may be carried out at an impregnation amount. More specifically, the liquid-impregnated wiping sheet for persons is provided as, for example, a hand wipe, a wipe, a menstrual blood wipe, a makeup removing sheet, a face wash sheet, an antiperspirant sheet, and a nail remover.

  When the liquid-impregnated sheet is provided as an anti-human liquid-impregnated skin covering sheet such as an anti-human face mask, a keratin care sheet, a moisturizing sheet and a slimming sheet, the liquid containing the active ingredient (for example, cosmetic) is added to 100 parts by mass of non-woven fabric. On the other hand, it may be impregnated at an impregnation amount of 150 parts by mass or more and 2500 parts by mass or less. Active ingredients include, for example, moisturizing ingredients, keratin soft ingredients, cleansing ingredients, antiperspirant ingredients, aroma ingredients, skin lightening ingredients, blood circulation promoting ingredients, ultraviolet light preventing ingredients, slimming ingredients, etc., but are not limited thereto. .

  The face mask has a shape suitable for covering the face, and further, for example, in a form in which openings corresponding to the eyes, nose and mouth are provided with punching openings or incisions as necessary. Provided. Alternatively, the face mask may be shaped to cover only a portion of the face (e.g., eyes, mouth, nose or cheeks). Alternatively, the face mask may be provided as a set consisting of a sheet covering the periphery of the eye and a sheet covering the periphery of the mouth, or may be provided as a set of sheets separately covering three or more parts.

The keratin care sheet is a sheet that promotes moisturization and softening of the keratinous layer and a sheet that exerts an effect of promoting the removal of excess keratinous body by impregnating a liquid (for example, a cosmetic) containing a keratinous softening component and a moisturizing component. It is.
A moisturizing sheet is a sheet used to moisturize or otherwise care any part of the body (for example, the neck, the back of the hand, the part from the neck to the chest (also called decollete)). The moisturizing sheet is impregnated with a liquid (eg, cosmetic) containing moisturizing ingredients and other active ingredients.
The slimming sheet is used, for example, by being attached to the thigh or abdomen.

  Alternatively, the laminated non-woven fabric of the present embodiment may be used for an objective liquid-impregnated sheet to be used on an object. For example, the laminated nonwoven fabric of the present embodiment may be impregnated with a liquid containing a cleaning agent, and provided as a wiping sheet for an objective. The wiping sheet for an object may be used for wiping and cleaning a floor, a kitchen, a toilet, a bath, furniture, a wall surface, a screen door, a window glass and the like.

  Even if the laminated nonwoven fabric of the present embodiment is used as any of the liquid-impregnated sheets, the surface layer and the spun bond nonwoven fabric are well integrated, so delamination is unlikely to occur even when a force is applied during use, and It is difficult to cause fuzzing due to insufficient interlacing of fibers. Then, while the product is in use, the soft touch feeling is provided to the user because the surface layer containing the short fibers comes into contact with the skin, regardless of which side is applied to the skin. Moreover, since the laminated nonwoven fabric of the present embodiment has a relatively low bending resistance and high drapability, it is flexible and easily adheres to a portion having irregularities, particularly to the face. Furthermore, in the laminated nonwoven fabric of the present embodiment, in the case where the surface layer is a layer containing highly absorbent fibers, particularly regenerated fibers, the comparison is caused by the surface layer not being excessively entangled with the spunbonded nonwoven fabric. The water retention capacity is high due to the large specific volume and the absorbency of the fiber itself. Therefore, when a liquid-impregnated sheet made of such a laminated non-woven fabric is used for personal use, the user feels fluid, that is, a sense that a sufficient amount of liquid is constantly supplied to the skin and the active ingredient acts. You can have

  In the laminated nonwoven fabric of the present embodiment, the spunbond nonwoven fabric suppresses excessive elongation of the laminated nonwoven fabric, and the surface layer containing the short fibers makes the nonwoven fabric relatively bulky, so the laminated nonwoven fabric of the present embodiment is used. The liquid impregnated sheet used is excellent in handleability. For example, when the liquid-impregnated sheet folded and stored in a pop-up type is taken out of the container, the sheet is unlikely to be excessively stretched even if a force is applied to the sheet. Moreover, when the laminated nonwoven fabric of this embodiment is used as a face mask, it is easy to open from the folded state, and elongation does not easily occur.

Hereinafter, the present embodiment will be described by way of examples.
What was shown in Table 1 as a spun bond nonwoven fabric used by a present Example was prepared. In Table 1, PET which represents a raw material is an abbreviation for polyethylene terephthalate, and PP is an abbreviation for polypropylene. The measuring method of mechanical properties is as described later. t1 and t2 were determined by observing a cross section cut perpendicularly to the thickness direction with an electron microscope (150 to 300 times) without applying a load to the spunbonded nonwoven fabric.

The following were prepared as fibers constituting the surface layer in this example.
Regenerated fiber 1: Solvent-spun cellulose fiber with a fineness of 1.7 dtex and a fiber length of 38 mm (trade name: Lyocell (registered trademark), manufactured by Lenzing Co.)
Regenerated fiber 2: Viscose rayon with a fineness of 1.7 dtex and a fiber length of 40 mm (trade name Corona, manufactured by Daiwabo Rayon Co., Ltd.)
Splittable composite fiber 1: Splittable composite fiber having a split number of 8 (combination of fibers formed by splitting and having the smallest size of the split), composed of a combination of polyethylene terephthalate / high density polyethylene with a size of 2.2 dtex and a fiber length of 51 mm Is 0.275 dtex) (trade name: DFS (SH), Daiwabo Polytec Co., Ltd.)

(Examples 1 to 4, Comparative Examples 1 to 2)
A staple fiber web containing 100% by mass of the regenerated fiber 1 was prepared using a parallel card machine to have a basis weight shown in Table 2. Two staple fiber webs were prepared.
A short fiber web is laminated on both sides of the spunbonded nonwoven fabric shown in Table 2 to obtain a laminated fiber web, which is placed on a 90 mesh plain weave support and conveyed at a speed of 4 m / min. The water flow shown in Table 2 is sprayed once from the side of one surface ("Table" in Table 2), and then from the side of the other surface ("Back" in Table 2) to Table 2 A hydroentanglement process was performed in which the water flow indicated by water pressure was injected once. The nozzle used in the hydroentangling treatment was a nozzle provided with orifices with a hole diameter of 0.1 mm at intervals of 0.6 mm, and the distance between the nozzles and the laminated fiber web was 20 mm during the treatment. Next, the laminated fiber web after the hydroentangling treatment was dried using a hot-air-through heat treatment machine set at 80 ° C. to obtain a nonwoven fabric.

(Examples 5-6, comparative examples 3-5)
Example 1 except that a short fiber web containing 40% by mass of the regenerated fiber 2 and 60% by mass of the splittable conjugate fiber 1 was produced using a parallel card machine to have a basis weight as shown in Table 2. A nonwoven fabric was obtained in the same manner as in.

  The evaluation results of each example and each comparative example are shown in Table 2 and Table 3.

  Each physical property in the table was implemented by the following method.

[thickness]
The thickness of the non-woven fabric was measured using a thickness measuring machine (trade name: THICKNESS GAUGE model CR-60A, manufactured by Daiei Kagaku Seiki Mfg. Co., Ltd.) under a load of 294 Pa.
The specific volume was calculated from the basis weight and thickness of the non-woven fabric.

[Boughness]
The bending resistance of the non-woven fabric was measured according to JIS L 1096: 2010 8.21.5 E method (handle ohm method). Specifically, it measured in the following procedures.
A test piece of 20 cm in length and 20 cm in width is placed on the sample table so that the measurement direction of the test piece is perpendicular to the slot (10 mm gap width).
Next, lower the blade of the penetrator adjusted so as to be lowered to 8 mm from the surface of the sample table, and press the test piece, 6.7 cm (1/3 of the width of the test piece) from either side At the position, the resistance to pushing is read at different positions in the vertical and horizontal directions. Read the highest value (N) indicated by the microammeter as the resistance value. The sum of the highest values of the four sides is determined, and the average value of three times is calculated to determine the stiffness of the sample.
The moisture resistance when wet (wet) is obtained by placing a polyethylene sheet (23 cm in length, 23 cm in width, 0.06 mm in thickness) under the non-woven fabric in a state in which 500 parts by mass of distilled water is impregnated in 100 non-woven fabric parts. Measured. The value obtained by subtracting the measurement value of the bending resistance of the polyethylene sheet alone from the obtained measurement value was taken as the bending resistance when wet.

Water retention rate
The non-woven fabric was cut into MD direction × CD direction = 100 mm × 100 mm, and after measuring the mass of the non-woven fabric, it was dipped in distilled water for 2 minutes. Then, the three corners of the non-woven fabric impregnated with distilled water were sandwiched between the lathes and suspended, the mass after 10 minutes was measured, and the water retention rate was calculated according to the following equation.
Water retention rate (%) = [(M2-M1) / M1] × 100
M1: mass of nonwoven fabric before impregnated with distilled water (g)
M2: Weight (g) of non-woven fabric after suspended for 10 minutes after being impregnated with distilled water

[Breaking strength, breaking elongation, stress at 10% elongation]
According to JIS L 1096: 2010 8.14.1 A method (strip method), using a constant speed tension type tensile tester, conditions of width 5 cm of sample piece, grip interval 10 cm, tensile speed 30 ± 2 cm / min It was subjected to a tensile test, and the load value at break (breaking strength), breaking elongation, and stress at 10% elongation were measured. The tensile test was conducted with the longitudinal direction (MD direction) and the transverse direction (CD direction) of the nonwoven fabric as the tensile direction. The evaluation results are all shown as the average of values measured for three samples.
The breaking strength and the like when wet (wet) were measured in a state in which 100 parts by mass of the nonwoven fabric was impregnated with 500 parts by mass of distilled water.

[Peeling strength]
A sample piece 15 cm long (dimension in the MD direction) and 5 cm wide (dimension in the CD direction) is prepared, and tapes (No. 4267 75 mm × 50 m made by Tesa) are pasted on both surfaces of the sample piece. Furthermore, after pasting, the tape protruding from the sample piece is cut off. Only one surface layer (first surface layer) is peeled off from the 7.5 cm interlayer in the length direction, and the peeled first surface layer is held 2.5 cm between the chucks of a constant speed tension type tensile tester, and the remaining intermediate Also for the laminate of the layer and the surface layer (the second surface layer), the clamping distance is set to 10 cm with the chuck of the tester being 2.5 cm apart. The peel strength of the first surface layer and the spunbond nonwoven fabric was measured by applying a tensile test under the condition of a speed of 30 ± 2 cm / min, and the maximum value was taken as the peel strength.

When Example 1 and Comparative Example 2 are compared, Example 1 showed higher peel strength. In Example 1 and Comparative Example 2, both of the spunbonds used had a basis weight of 10 g / m ² , but V1 / V2 of the spunbonded nonwoven fabric used in Comparative Example 2 is as small as 1.4, and long fibers Is more firmly bonded at the bonding portion. Therefore, in Comparative Example 2, it is considered that the degree of interlacing of the fibers between the surface layer and the spunbond nonwoven fabric is smaller than that in Example 1 and the peel strength is smaller. Also, the bending resistance of Example 1 was smaller than that of Comparative Example 2. It is considered that this is due to the V1 / V2 of the spunbonded nonwoven fabric used in Comparative Example 2 being smaller, the fibers being strongly bonded in the bonded portion, and the spunbonded nonwoven fabric itself being harder.
The same applies to the peel strength and the bending resistance of Example 2 and Comparative Example 1.

When the peel strengths of Examples 1 to 3 are compared, the larger the basis weight of the spunbond nonwoven fabric, the larger the peel strength tends to be, and the peel of Example 3 using a spunbond nonwoven fabric having a basis weight of 20 g / m ² The power is particularly big. It is considered that this is because the apparent number of fibers per unit area of the non-woven fabric increases and the chance of entanglement with the fibers of the surface layer increases as the fabric weight increases. On the other hand, Example 3 using a spunbond non-woven fabric having a basis weight of 20 g / m ² has a slightly harder texture compared to Examples 1 and 2 and actually has a high bending resistance, particularly a high wet bending resistance. It was a thing.
The peel strength of Example 4 is smaller than that of Example 1. Since V1 / V2 of the spunbond nonwoven fabric used in Example 4 is about half of that of the spunbond nonwoven fabric used in Example 1, and the bonded portion is more strongly bonded, in Example 4, the fibers of the interlayer It is considered that the degree of interlacing is smaller than that of Example 1.

  Examples 5 and 6, which include fibers derived from splittable conjugate fibers in the surface layer, showed smaller bending resistance and higher peel strength as compared to Examples 1 to 4. It is considered that this is because the ultrafine fibers formed by the division of the splittable conjugate fiber make the whole non-woven fabric soft, and that the ultrafine fibers and the ultrafine fibers and the long fibers are entangled well.

  When Example 5 and Comparative Example 4 are compared, Example 5 shows higher peel strength, and there is no significant difference in bending resistance. The reason for the higher peel strength of Example 5 is as described in relation to the comparison between Example 1 and Comparative Example 2. Although the reason why a large difference in bending resistance does not occur is not clear, it is considered that the effect of improving the flexibility of the non-woven fabric by the ultrafine fibers exceeds the influence of the degree of adhesion of the spunbonded nonwoven fabric on the bending resistance.

  When comparing Example 6 with Comparative Example 5, Example 6 showed higher peel strength and lower stiffness (both dry and wet). These results are considered to be due to the fact that V1 / V2 of the spunbond nonwoven fabric used in Example 6 is larger than V1 / V2 of the spunbond nonwoven fabric used in Comparative Example 5.

  When Example 6 is compared with Comparative Example 3, Example 6 showed higher peel strength and lower bending resistance (both dry and wet). When the spunbond nonwoven fabrics used in Example 6 and Comparative Example 3 are compared, the fiber diameter and the fineness of the constituent fibers are not so different, and the basis weight of the one used in Comparative Example 3 is larger. If this is taken into consideration, Comparative Example 3 may show a larger peel strength as in the case described in Examples 1 to 3, but in fact, Example 6 showed a larger peel strength. This is considered to be because V1 / V2 of the spunbonded nonwoven fabric used in Example 6 is larger than V1 / V2 of the spunbonded nonwoven fabric used in Comparative Example 3, as described above.

The present embodiment includes the following aspects.
(Aspect 1)
A spunbonded nonwoven fabric, and a laminated nonwoven fabric including a surface layer including short fibers having a fiber length of 200 mm or less, which are disposed on both sides of both surfaces of the spunbonded nonwoven fabric,
The spunbonded nonwoven fabric and the surface layer are integrated by interlacing fibers with each other,
In the spunbonded nonwoven fabric, V1 / V2 is 1.5 or more, where V1 is a volume of one bonded portion formed by bonding fibers, and V2 is a volume of fibers contained in the bonded portion.
Laminated non-woven fabric.
(Aspect 2)
The laminated nonwoven fabric according to aspect 1, wherein the surface layer contains 20% by mass or more of cellulose fibers.
(Aspect 3)
The laminated nonwoven fabric according to aspect 1 or 2, wherein the surface layer comprises fibers derived from a splittable conjugate fiber.
(Aspect 4)
The spunbonded nonwoven has a basis weight of ^{5g / m 2 ~30g / m 2} , one of the layered nonwoven fabric embodiments 1-3.
(Aspect 5)
The sheet | seat for liquid impregnations containing the lamination | stacking nonwoven fabric in any one of an aspect 1-4.
(Aspect 6)
A liquid-impregnated sheet obtained by impregnating a liquid-impregnated sheet of aspect 5 with a liquid.
(Aspect 7)
A face mask obtained by impregnating the liquid-impregnating sheet of aspect 5 with a liquid.
(Aspect 8)
Assuming that the volume of one bonding portion where fibers are bonded is V1 and the volume of fibers contained in the bonding portion is V2, on both surfaces of the spun bond nonwoven fabric having V1 / V2 of 1.5 or more, A fiber web containing short fibers having a fiber length of 200 mm or less is disposed to produce a laminated fiber web, and the laminated web is subjected to an entanglement treatment to intermingle the spunbonded nonwoven fabric with the short fiber web. A method for producing a laminated non-woven fabric, comprising integrating.

  The laminated nonwoven fabric of the present embodiment can be used for various liquid impregnated sheets such as cleansing sheets and antiperspirant sheets in addition to face masks.

Claims (8)

A spunbonded nonwoven fabric, and a laminated nonwoven fabric including a surface layer including short fibers having a fiber length of 200 mm or less, which are disposed on both sides of both surfaces of the spunbonded nonwoven fabric,
The spunbonded nonwoven fabric and the surface layer are integrated by interlacing fibers with each other,
In the spunbonded nonwoven fabric, V1 / V2 is 1.5 or more, where V1 is a volume of one bonded portion formed by bonding fibers, and V2 is a volume of fibers contained in the bonded portion.
Laminated non-woven fabric.   The laminated nonwoven fabric according to claim 1, wherein the surface layer contains 20% by mass or more of cellulose fibers.   The laminated nonwoven fabric according to claim 1, wherein the surface layer comprises fibers derived from a splittable conjugate fiber. The spunbonded nonwoven has a basis weight of ^{5g / m 2 ~30g / m 2} , laminated nonwoven fabric according to any one of claims 1 to 3.   The sheet | seat for liquid impregnations containing the lamination | stacking nonwoven fabric of any one of Claims 1-4.   A liquid-impregnated sheet obtained by impregnating a liquid-impregnated sheet according to claim 5 with a liquid.   A face mask obtained by impregnating the liquid-impregnated sheet according to claim 5 with a liquid.   Assuming that the volume of one bonding portion where fibers are bonded is V1 and the volume of fibers contained in the bonding portion is V2, on both surfaces of the spun bond nonwoven fabric having V1 / V2 of 1.5 or more, A fiber web containing short fibers having a fiber length of 200 mm or less is disposed to produce a laminated fiber web, and the laminated web is subjected to an entanglement treatment to intermingle the spunbonded nonwoven fabric with the short fiber web. A method for producing a laminated non-woven fabric, comprising integrating.