Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
  • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
  • D04H1/498—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres entanglement of layered webs
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
  • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
  • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
  • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary

Definitions

• the present invention relates to a nonwoven fabric in which a plurality of layers are laminated.
• non-woven fabrics have been used as an application that makes use of liquid retention and texture.
• skin care such as whitening, moisturizing, and anti-aging can be achieved by holding the chemical solution on the skin surface for a certain period of time and allowing the chemical solution to penetrate the skin sufficiently.
• the demand continues to expand.
• Patent Document 1 a laminated unemployed fabric in which a nonwoven fabric composed of nanofibers having a single fiber diameter of 1 nm to 500 nm is laminated on a base nonwoven fabric has been proposed.
• Patent Document 2 a non-woven fabric including a fiber in which a latent crimped yarn is crimped (hereinafter sometimes referred to as a crimped fiber) has also been proposed (Patent Document 2). Since the protrusion of the end of the fiber from the nonwoven fabric is suppressed and the tingling sensation given to the user is alleviated, the user can be given a feeling of good adhesion to the skin, which is suitable for face mask applications.
• the nonwoven fabric disclosed in Patent Document 1 described above includes a nonwoven fabric layer made of nanofibers, and the entanglement between the nanofibers is strong, so that the stretched elastic recovery rate of the laminated nonwoven fabric is low. And by this, this laminated nonwoven fabric has the subject that it is inferior to the followable
• the nonwoven fabric disclosed in Patent Document 2 contains crimped fibers, the nonwoven fabric surface has irregularities and the contact area with the contacted object is small, so the coefficient of static friction between the nonwoven fabric and the skin is low, and wiping performance When it is used as a skin care cosmetic, there is a problem that it is inferior to the tightening feeling and adhesion feeling given to the user.
• an object of the present invention is to provide a laminated unwoven cloth having a high strength when wet, an elastic recovery rate when wet, and a high coefficient of static friction when wet.
• the present invention has the following configuration. That is, (1) A laminated nonwoven fabric having at least a nonwoven fabric A layer and a nonwoven fabric B layer, The nonwoven fabric A layer and the nonwoven fabric B layer are integrated,
• the nonwoven fabric A layer contains fibers in which the latent crimped yarn is crimped,
• the fiber in which the latent crimped yarn is crimped is a main constituent material of the nonwoven fabric A layer,
• the single crimped fiber diameter of the fiber in which the latent crimped yarn is crimped is 0.2 to 8.0 ⁇ m
• the non-woven fabric B layer contains short fibers having a single yarn fiber diameter of 10 to 100 ⁇ m,
• the content of the short fibers is 80% by mass or more with respect to the nonwoven fabric B layer
• the outermost layer on at least one surface of the laminated nonwoven fabric is the nonwoven fabric A layer,
• the stretched elastic recovery rate of at least one of the vertical direction and the horizontal direction of the laminated nonwoven fabric is 60% or more,
• the laminated nonwoven fabric, wherein the single fiber diameter of the short fiber is 15 to 100 ⁇ m.
• the basis weight of the nonwoven fabric A layer is 5 to 50 g / m 2 ;
• the laminated nonwoven fabric, wherein the nonwoven fabric B layer has a basis weight of 15 to 50 g / m 2 .
• a fiber in which the latent crimped yarn is crimped is a composite fiber having two types of thermoplastic resins;
• the laminated nonwoven fabric according to any one of the above, wherein the two kinds of thermoplastic resins are both polyester.
• the laminated nonwoven fabric according to any one of the above, wherein the latent crimped fiber is a bimetallic composite fiber. (6) Any one of the above laminated nonwoven fabrics for cosmetics.
• Preferred applications of the present invention include the following. (7) A skin care product using any one of the above laminated nonwoven fabrics.
• a preferable method for producing the laminated nonwoven fabric of the present invention includes the following modes.
• (8) A method for producing a laminated nonwoven fabric according to any one of (1) to (5), A step of laminating a nonwoven fabric A layer having a basis weight of 20 to 30 g / m 2 or less and a nonwoven fabric B layer having a basis weight of 20 to 40 g / m 2 or less, and further integrating them; Applying a chemical treatment to the nonwoven fabric A layer;
• a method for producing a laminated nonwoven fabric comprising the steps of: heat-treating the nonwoven fabric A layer in this order.
• a laminated nonwoven fabric having a high strength when wet, a high stretch recovery rate when wet, and a high coefficient of static friction when wet can be obtained.
• the laminated nonwoven fabric of the present invention has at least a nonwoven fabric A layer and a nonwoven fabric B layer.
• the nonwoven fabric A layer contains the fiber (henceforth only called a crimped fiber) by which the latent crimped yarn was crimped as a main structural material of this nonwoven fabric A layer.
• the crimped fiber is the main constituent material of the nonwoven fabric A layer. Specifically, in order to obtain a high elastic elongation recovery rate and a high static friction coefficient when the laminated nonwoven fabric is wet, It means that the compressed fiber is contained in an amount exceeding 50% by mass with respect to the entire nonwoven fabric A layer.
• crimped fiber is contained in the nonwoven fabric A layer by 80 mass% or more with respect to the whole nonwoven fabric A layer, and crimped fiber is contained in the nonwoven fabric A layer in 100 mass% with respect to the whole nonwoven fabric A layer. It is particularly preferable. In short, it is a particularly preferable embodiment that the nonwoven fabric A layer is composed only of crimped fibers. However, even in this case, the nonwoven fabric A layer is other than the crimped fibers as long as the effects of the present invention are not impaired. Fibers and the like may be included.
• the crimped fiber is a fiber obtained by subjecting a latent crimped yarn, which is a bimetallic type or an eccentric sheath type composite fiber made of two types of thermoplastic resins, to a latent crimping manifestation treatment such as heat treatment.
• a latent crimped yarn which is a bimetallic type or an eccentric sheath type composite fiber made of two types of thermoplastic resins
• examples of the bimetal type composite fiber include a side-by-side type composite fiber in which two types of thermoplastic resins are adjacent to each other in a direction substantially parallel to the length direction of the fiber.
• the crimped fiber is a fiber having crimps utilizing a difference in thermal shrinkage or stress between two types of thermoplastic resins, and is different from a fiber having crimps applied only by a machine such as a stuffing box type crimper. .
• the single yarn fiber diameter of the crimped fiber is not less than 0.2 ⁇ m and not more than 8.0 ⁇ m.
• the non-woven fabric A layer has an effect that the coefficient of static friction at the time of wetting between the surface of the laminated non-woven fabric whose outermost layer of the laminated non-woven fabric is the non-woven fabric A layer (hereinafter sometimes referred to as laminated non-woven fabric surface A) and the skin is increased, and The effect of increasing the stretch elastic recovery rate when wet can be imparted to the laminated nonwoven fabric of the present invention.
• the laminated nonwoven fabric of this invention which has said characteristic is used as laminated nonwoven fabrics for cosmetics, such as a face mask, Comprising:
• the lower limit value of the single yarn fiber diameter of the crimped fiber is the suppression of the occurrence of yarn breakage in the spinning process of the crimped fiber, and when the laminated nonwoven fabric is wet due to sufficient expression of the three-dimensional crimp of the crimped fiber.
• the upper limit value of the single fiber diameter of the crimped fiber is to improve the static friction coefficient between the surface of the nonwoven fabric A layer and the skin when wet, that is, the static friction coefficient when the laminated nonwoven fabric surface A and the skin are wet. In order to improve this, it is necessary to be 8.0 ⁇ m or less, and preferably 6.0 ⁇ m or less.
• the basis weight of the nonwoven fabric A layer is preferably 5 to 50 g / m 2 .
• the basis weight of the nonwoven fabric A layer is 5 g / m 2 or more, the laminated nonwoven fabric having the nonwoven fabric A layer has an excellent stretch elastic recovery rate when wet, and the laminated nonwoven fabric is used as a face mask.
• the adhesion effect between the face mask and the user's skin can be made excellent.
• the basis weight of the nonwoven fabric A layer is 50 g / m 2 or less, when the laminated nonwoven fabric having this nonwoven fabric A layer is used as a face mask, the user of this face mask will realize an excellent tightening effect. Can do.
• the lower limit of the basis weight of the nonwoven fabric A layer is more preferably 8 g / m 2 or more, and particularly preferably 20 g / m 2 or more.
• the upper value of the nonwoven fabric A layer is preferably 40 g / m 2 or less, more preferably 30 g / m 2 or less, from the viewpoint of weight reduction of the laminated nonwoven fabric.
• the crimped fiber is not particularly limited, but is preferably a composite fiber having two kinds of thermoplastic resins because it is necessary to express a finer crimp. Moreover, it is preferable that both said 2 types of thermoplastic resins are polyester. Moreover, as a form of a composite fiber, a bimetal type, an eccentric sheath type, etc. can be illustrated, and since it is excellent in productivity especially, it is preferable that it is a bimetal type.
• the fiber length of the crimped fibers is preferably 30 mm or more and 80 mm or less on the number average because it has good passability in the card process when the nonwoven fabric A layer is formed.
• thermoplastic resin used for the crimped fiber examples include polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyamide, and thermoplastic polyurethane.
• the thermoplastic resin may contain various additives such as inorganic particles such as titanium oxide and silica, colorants such as carbon black and pigment, antioxidants and ultraviolet absorbers.
• polyesters such as polyethylene terephthalate, polytrimethylene terephthalate, and polybutylene terephthalate are preferable as the thermoplastic resin used for the crimped fiber from the viewpoint of excellent chemical resistance and durability.
• the cross-sectional shape of the crimped fiber can be appropriately selected depending on the use of the laminated nonwoven fabric.
• the cross-sectional shape is a perfect circular cross section, a flat cross section, a triangular cross section, a triangular cross section, a hexagonal cross section, a Y-shaped cross section, Various cross-sectional shapes such as a cross-section can be selected.
• sea-island structure fibers in which island components are scattered in sea components are prepared.
• the island component is in a state where two or more different thermoplastic resins are joined.
• the sea component in the fiber is dissolved with an alkaline solution or the like to leave the island component, and a bimetal type is formed.
• the nonwoven fabric A layer provided in the laminated nonwoven fabric of the present invention is composed of crimped fibers only, and the crimped fiber has a single fiber diameter of 3.5 ⁇ m or more and 6.0 ⁇ m or less, and has a basis weight. it is a particularly preferred embodiment it is 20 g / m 2 or more 30 g / m 2 or less.
• the non-woven fabric B layer contains short fibers having a single yarn fiber diameter of 10 ⁇ m to 100 ⁇ m.
• the content of short fibers in the nonwoven fabric B layer is 80% by mass or more based on the nonwoven fabric B layer.
• the laminated nonwoven fabric having the above-described nonwoven fabric B layer has high strength when wet.
• the lower limit of the single fiber diameter of the short fiber is 10 ⁇ m or more, and particularly preferably 15 ⁇ m or more, because the laminated nonwoven fabric having the nonwoven fabric B layer has high strength when wet.
• the upper limit value of the single yarn fiber diameter of the short fiber is 100 ⁇ m or less because the softness of the laminated nonwoven fabric having the nonwoven fabric B layer is excellent.
• synthetic fibers such as polyester fibers, polyamide fibers and acrylic fibers, and natural fibers such as cotton and wool are preferably used.
• a synthetic fiber is more preferably used and a polyester fiber is particularly preferably used because the laminated nonwoven fabric having the nonwoven fabric B layer can have higher strength when wet.
• the fiber length of the above-mentioned short fibers is preferably 10 to 100 mm in number average for the reason of maintaining the card passing property during production and the tensile strength of the nonwoven fabric. More preferably, it is 25 mm to 80 mm.
• the basis weight of the nonwoven fabric B layer is preferably 15 to 50 g / m 2 .
• the basis weight of the nonwoven fabric B layer is 15 g / m 2 or more, the strength of the laminated nonwoven fabric provided with the nonwoven fabric B layer can be improved.
• the basis weight of the nonwoven fabric B layer is 50 g / m 2 or less, the stretched elastic recovery rate of the laminated nonwoven fabric provided with the nonwoven fabric B layer is more suitable for face mask applications, and the face mask using this laminated nonwoven fabric is The user can be given a real feeling of the tightening effect.
• the lower limit of the basis weight of the nonwoven fabric B layer is more preferably 20 g / m 2 or more.
• the fabric weight of the nonwoven fabric B layer is 40 g / m 2 or less because of the weight reduction of the laminated nonwoven fabric.
• the basis weight of the nonwoven fabric A layer is preferably 5 to 50 g / m 2
• the basis weight of the nonwoven fabric B layer is preferably 15 to 50 g / m 2 .
• the basis weight of the nonwoven fabric A layer is 8 to 30 g / m 2 and the basis weight of the nonwoven fabric B layer is 20 to 40 g / m 2 . It is more preferable.
• the laminated nonwoven fabric of the present invention has the nonwoven fabric A layer and the nonwoven fabric B layer, and the nonwoven fabric A layer and the nonwoven fabric B layer are laminated and integrated. It is excellent in strength at time, elongation elastic recovery rate when wet, and coefficient of static friction when wet.
• the nonwoven fabric A layer can realize a high stretch elastic recovery rate when wet and a high coefficient of static friction when wet, but the nonwoven fabric A for causing three-dimensional crimps to appear in the crimped fibers contained in the nonwoven fabric A layer. Due to the heat treatment process of the layer, the nonwoven fabric A layer shrinks and becomes inferior in elasticity. As a result, it becomes unsuitable for uses such as a face mask that is used while being in close contact with the skin while being stretched. In addition, it is possible to give the nonwoven fabric A layer sufficient strength to handle the nonwoven fabric A layer alone by increasing the basis weight of the nonwoven fabric A layer, but the shrinkage of the nonwoven fabric A layer by the heat treatment step described above is possible. Can not be suppressed. Moreover, although only the nonwoven fabric B layer can achieve high strength when wet, it is inferior to the stretch elastic recovery rate when wet and the coefficient of static friction when wet, and is unsuitable for applications such as face masks.
• the laminated nonwoven fabric of the present invention has a laminated nonwoven fabric A layer and a nonwoven fabric B layer.
• the laminated nonwoven fabric of the present invention has a nonwoven fabric B layer, and this nonwoven fabric B layer is laminated and integrated with the nonwoven fabric A layer, so that shrinkage of the nonwoven fabric A layer due to heat treatment of the nonwoven fabric A layer is suppressed.
• the laminated nonwoven fabric has sufficient strength to handle the laminated nonwoven fabric as a face mask or the like.
• the laminated nonwoven fabric of this invention has a nonwoven fabric A layer, and when this nonwoven fabric A layer is laminated and integrated with the nonwoven fabric B layer, in addition to said effect, when the laminated nonwoven fabric surface A and the skin are wet.
• the effect that the static friction coefficient becomes high and the effect that the stretched elastic recovery rate when the laminated nonwoven fabric is wet can be obtained.
• the outermost layer of the at least one surface of a laminated nonwoven fabric is a nonwoven fabric A layer
• Nonwoven fabric A layer / nonwoven fabric B layer (II) Nonwoven fabric A layer / nonwoven fabric B layer / nonwoven fabric A layer
• the laminated nonwoven fabric of the present invention may have a layer other than the nonwoven fabric A layer and the nonwoven fabric B layer as long as the effects of the present invention are not impaired.
• layers other than the non-woven fabric A layer and the non-woven fabric B layer include non-woven fabrics, woven fabrics, knitted fabrics, and films, and examples of such laminated non-woven fabric include non-woven fabric A layer / nonwoven fabric B layer. Examples include a fabric layer and the like.
• a protective layer such as a film may be further added to the outermost surface of the laminated nonwoven fabric of the present invention.
• a protective layer for example, a protective layer / nonwoven fabric A layer / nonwoven fabric B layer
• this laminated nonwoven fabric is used as a laminated nonwoven fabric for cosmetics such as a face mask, Needless to say, when the layer such as the protective layer can be peeled from the laminated nonwoven fabric before, the effect of the laminated nonwoven fabric of the present invention is not hindered.
• the stretched nonwoven fabric of the present invention has a stretch elastic recovery rate of 60% or more in at least one of the vertical direction of the laminated nonwoven fabric and the horizontal direction of the laminated nonwoven fabric.
• the laminated nonwoven fabric of the present invention is a laminated nonwoven fabric for cosmetics such as a face mask, and the laminated nonwoven fabric is such that the direction in which the stretched elastic recovery rate of the laminated nonwoven fabric is 60% or more is substantially perpendicular to the longitudinal direction of the user's nose. By using, it becomes possible to improve the followability and tightening feeling of the laminated nonwoven fabric for cosmetics.
• the stretch elastic recovery rate of at least one of the vertical direction of the laminated nonwoven fabric and the horizontal direction of the laminated nonwoven fabric is preferably 65% or more.
• the vertical direction of the laminated nonwoven fabric refers to the traveling direction in the production process of the laminated nonwoven fabric
• the horizontal direction of the laminated nonwoven fabric refers to a direction perpendicular to the vertical direction.
• the upper limit value of the stretch elastic recovery rate of at least one of the vertical direction of the laminated nonwoven fabric and the horizontal direction of the laminated nonwoven fabric is not particularly limited, but it is 90% because it reduces the feeling of adhesion during use. The following is preferable.
• the coefficient of static friction of the surface of the nonwoven fabric A layer constituting the outermost surface of the laminated nonwoven fabric of the present invention is 0.80 or more.
• the static friction coefficient of the laminated nonwoven fabric surface A is 0.80 or more, the wiping property on the outermost surface on which the nonwoven fabric A layer of the laminated nonwoven fabric is arranged is excellent.
• the laminated nonwoven fabric of the present invention is a laminated nonwoven fabric for cosmetics such as a face mask, and the laminated nonwoven fabric for cosmetics is used so that the nonwoven fabric A layer is in contact with the user's skin, it is possible to give the user a superior feeling of adhesion It becomes.
• the static friction coefficient of the laminated nonwoven fabric surface A is preferably 1.00 or more, and more preferably 1.40 or more. Moreover, although it does not specifically limit about the upper limit of the static friction coefficient of the laminated nonwoven fabric surface A, it is preferable from the point which suppresses irritation
• the breaking strength of the laminated nonwoven fabric is preferably 10 N / 50 mm or more, more preferably 15 N / 50 mm or more on average in the vertical direction and the horizontal direction of the laminated nonwoven fabric in order to prevent tearing when the laminated nonwoven fabric is used.
• the upper value of the breaking strength of the laminated nonwoven fabric is not particularly limited, but is preferably 200 N / 50 mm or less for the purpose of obtaining the softness of the nonwoven fabric.
• the water retention rate of the laminated nonwoven fabric is also preferably 8 times by mass or more of the entire laminated nonwoven fabric, and more preferably 10 times by mass or more of the entire laminated nonwoven fabric.
• the upper value of the water retention of a laminated nonwoven fabric is not specifically limited, It is preferable that it is 20 mass times or less. This is because the liquid can be prevented from dripping from the face mask when the face mask using this laminated nonwoven fabric is used, and the face mask can be prevented from peeling off from the user's face due to its own weight. This is because it becomes excellent.
• the total basis weight of the laminated nonwoven fabric is preferably 20 to 100 g / m 2 .
• the lower side is more preferably 20 g / m 2 or more, and further preferably 30 g / m 2 or more.
• the upper side is more preferably 100 g / m 2 or less, and still more preferably 70 g / m 2 or less.
• the layer A and the layer B of the laminated nonwoven fabric of the invention are preferably spunlace nonwoven fabrics.
• a spunlace nonwoven fabric is obtained by a method in which constituent fibers are entangled with a high-pressure water stream. And, the method of entanglement of the constituent fibers by the high-pressure water flow has less yarn breakage of the constituent fibers at the time of entanglement compared to the method of entanglement of the constituent fibers by the needle punch, and as a result, a strong non-woven fabric layer is obtained. .
• the A layer and the B layer may be individually entangled with a high-pressure water flow, and the A layer and the B layer may be laminated and integrated with a high-pressure water flow to form a laminated nonwoven fabric.
• a web for the layer A that has not been entangled through the carding process and a web for the layer B that has not been entangled through the carding process are laminated, and the fibers are entangled by a high-pressure water stream.
• a laminated nonwoven fabric in which the A layer and the B layer are integrated may be used.
• integration refers to a state in which a layer and another layer are joined.
• the method for manufacturing the laminated nonwoven fabric of the present invention can be adopted as the method for manufacturing the laminated nonwoven fabric of the present invention. It is preferable to have in this order a step of laminating the nonwoven fabric A layer and the nonwoven fabric B layer, a step of applying a chemical treatment to the nonwoven fabric A layer, and a step of applying a heat treatment to the nonwoven fabric A layer.
• the basis weight of the nonwoven fabric A layer is preferably 20 to 30 g / m 2
• the basis weight of the nonwoven fabric B layer is preferably 20 to 40 g / m 2 or less.
• heat treatment may be performed to remove moisture from the laminated nonwoven fabric obtained as described above.
• a preferable heat treatment temperature is 100 to 130 ° C. or less.
• sea-island structured fibers are used for the nonwoven fabric A layer
• the sea component is an alkali-soluble resin
• the alkali-soluble resin can be eluted with a sodium hydroxide solution at 90 ° C. or higher and 110 ° C. or lower.
• the island component remains and becomes a latent crimped yarn.
• the nonwoven fabric A layer is subjected to heat treatment.
• the step of applying heat treatment to the nonwoven fabric A layer include the following.
• the width of the laminated nonwoven fabric is expanded by 1 to 10% or less before and after setting when the laminated nonwoven fabric is set.
• variety of a laminated nonwoven fabric means the width
• the laminated unemployed cloth of the present invention can be applied for cosmetic material use, wiping material use, pharmaceutical use, sanitary material use, miscellaneous goods use and the like. It is preferable to use the laminated nonwoven fabric by immersing it in a chemical solution or water, and it is particularly preferable to apply it to a skin care product, that is, a cosmetic material, which is used by impregnating a skin lotion or cosmetic liquid such as a face mask.
• the cross-sectional area of the fiber is measured from the cross-sectional photograph, and the diameter of the single yarn fiber of the non-woven fabric A layer or the non-woven fabric B layer is calculated by converting the cross-sectional area to the true circle diameter It was.
• Test piece (a laminated nonwoven fabric having a nonwoven fabric A layer and a nonwoven fabric B layer) having a width of 25 mm and a length of 250 mm, the nonwoven fabric having the length direction of the test piece in the laminated nonwoven fabric of the present invention. It cut out from the laminated nonwoven fabric so that it might become the advancing direction at the time of manufacture of A layer. Separately, it was cut out in a direction perpendicular to the traveling direction. Five test pieces were prepared for each direction. Then, these test pieces are immersed in 3 L of 20 ° C. distilled water for 10 minutes or more, taken out from the distilled water, and then immediately attached to a constant speed extension type tensile tester to measure the elongation elastic recovery rate. It was.
• the grip interval in the length direction of the test piece was 100 mm.
• the gripping interval was changed from 100 mm to 120 mm at a speed of 200 mm / min.
• the gripping interval was returned from 120 mm to 100 mm at a speed of 200 mm / min.
• the grip interval was changed from 100 mm to 130 mm at a speed of 200 mm / min, and stopped at the grip interval of 130 mm.
• m s m / S
• ms basis weight of laminated nonwoven fabric (mass per unit area (g / m 2 ))
• m average mass of the test piece (g)
• S Area (m 2 ) of the test piece.
• m sa m / S
• m sa basis weight of nonwoven fabric A layer before lamination (mass per unit area (g / m 2 ))
• m average mass of the test piece (g)
• S Area (m 2 ) of the test piece.
• M sb m / S
• m sb basis weight of nonwoven fabric B layer before lamination (mass per unit area (g / m 2 ))
• m average mass of the test piece (g)
• S Area (m 2 ) of the test piece.
• one test piece to be evaluated was immersed in 3 L of 20 ° C. distilled water for 10 minutes or more, and after removing from the distilled water, the test piece was immediately attached to the weight of the slip angle measuring device.
• silicon pseudo-skin (Buelux P001-001 # BK) is attached to the sliding tilt angle measuring device, and the weight (mass: 872 g) attached to the test piece is set so that the measurement surface of the test piece comes into contact with the silicon pseudo-skin.
• the weight is dropped on the artificial skin so that the vertical or horizontal direction of the test piece coincides with the sliding direction of the sliding inclination measuring device and the inclination angle is less than 3 ° / second.
• the inclination angle was read, and the tangent (tan ⁇ ) of the inclination angle was taken as the coefficient of static friction.
• the average of the static friction coefficients in the vertical direction of the five test pieces obtained was taken as the static friction coefficient in the vertical direction of the laminated nonwoven fabric.
• the average of the static friction coefficients in the horizontal direction of the other five test pieces was used as the static friction coefficient in the horizontal direction of the laminated nonwoven fabric.
• Water retention rate of laminated nonwoven fabric Measured according to JIS L 1913: 2010 6.9.2. Five 100 mm square test pieces (laminated nonwoven fabric having a nonwoven fabric A layer and a nonwoven fabric B layer) were prepared, and the mass was measured. Next, 3 L of distilled water is put into an appropriately sized container, and these test pieces are immersed in distilled water at 20 ° C. for 10 minutes or more. Next, the test pieces are taken out of the distilled water with tweezers, and the test pieces are removed. One end of the test piece was hung with a clip, and after water was dropped or dropped for 1 minute, the mass of the test piece was measured to obtain the water retention amount. The water retention rate was calculated from the average value of the water retention amount of each of the five test specimens obtained using the following formula.
• m (m 2 ⁇ m 1 ) / m 1 m: water retention rate (mass times) m 1 : Mass of test specimen in standard state (g) m 2 : Mass (g) after wetting the test piece and dripping or dropping water.
• the test piece is immediately attached to a constant-speed extension type tensile tester and the breaking stress is measured. It was. In the length direction of the test piece, the grip interval is 100 mm, a load is applied until the test piece is cut at a tensile speed of 200 mm / min, and the maximum stress when the test piece breaks is read from the stress-strain curve. The average of the five measured values obtained in both the vertical and horizontal directions of the nonwoven fabric was taken as the breaking strength in the vertical or horizontal direction of the laminated nonwoven fabric.
• Example 1 (Ultra fine three-dimensional crimped yarn) Polyethylene terephthalate (PET1 melt viscosity: 140 Pa ⁇ s) as island component 1, polytrimethylene terephthalate (3GT melt viscosity: 130 Pa ⁇ s) as island component 2, and 5-sodium sulfoisophthalic acid 8.0 as sea component Polyethylene terephthalate (copolymerized PET) in which 10% by mass of polyethylene glycol having a mol% and a molecular weight of 1000 was copolymerized was prepared. These were melted separately at 280 ° C., weighed, and poured into a spin pack incorporating a composite die.
• a sea-island composite fiber having an island component having a bimetallic composite form in which the island component 1 and the island component 2 were bonded together and a sea component of copolymerized PET was obtained.
• an island component having a composite form of 250 island bimetallic composite fibers was formed on one sea-island composite fiber.
• the composite ratio of island component 1 / island component 2 / sea component was adjusted to 40/40/20 by weight.
• an oil agent was applied and wound at a spinning speed of 1500 m / min to obtain an undrawn yarn.
• the undrawn yarn was passed through a roller pair at 80 ° C. through a roller pair at 130 ° C., and stretched 3.2 times at a final drawing speed of 800 m / min to obtain a sea-island composite fiber (70 dtex-12 filament).
• the resulting sea-island fibers converged to 400,000 decitex. From this, the oil agent at the time of spinning was removed, a new oil agent was applied, and then a tow subjected to mechanical crimping using an extrusion type crimper was obtained. Next, the obtained tow was wound around a roll provided with blades outwardly at intervals of 51 mm, and cut to implement cut processing to obtain a cut fiber having a single yarn fineness of 5.8 dtex and a length of 51 mm.
• Nonwoven fabric A layer The ultrafine fiber cut fiber was opened with a card and then made into a web with a cross wrap weber. This web was entangled with a high-pressure water stream under the conditions of pressure: 3 MPa and speed of 1.0 m / min to obtain a nonwoven fabric A layer of 35 g / m 2 .
• Nonwoven fabric B layer A polyethylene terephthalate cut fiber manufactured by Toray Industries, Inc. (variety: T471 single yarn 1.6 dtex, cut length 51 mm) was opened with a card and then made into a web with a cross wrap weber. This web was entangled with a high-pressure water stream under the conditions of pressure: 3 MPa and speed of 1.0 m / min to obtain a nonwoven fabric B layer of 50 g / m 2 .
• the nonwoven fabric A layer and the nonwoven fabric B layer obtained above were laminated and further entangled and integrated with a high-pressure water stream under the conditions of a pressure of 10 MPa and a speed of 1.0 m / min to obtain a laminated nonwoven fabric.
• this laminated nonwoven fabric was dried at 110 ° C., and then, using a beam dyeing machine, the above laminated nonwoven fabric was treated with 1% sodium hydroxide aqueous solution at a temperature of 95 ° C., a bath ratio of 1:40, and a treatment time of 40 minutes.
• the sea component of the ultrafine fiber cut fiber contained in the nonwoven fabric A layer is removed from the sea, and then the resulting laminated nonwoven fabric is expanded by 130% while spreading the laminated nonwoven fabric by 3%.
• a heat treatment was performed at 5 ° C. for 5 minutes, and crimps were developed in the latent crimped yarn contained in the nonwoven fabric A layer.
• the basis weight of the obtained laminated nonwoven fabric was 78 g / m 2 .
• the resulting laminated nonwoven fabric has an elastic recovery rate of 84.1%, a static friction coefficient of the laminated nonwoven fabric surface A of 1.51, a water retention rate of 13.2 mass times, a breaking strength of 80 N, and the crimp contained in the nonwoven fabric A layer.
• the single fiber diameter of the fiber was 4.9 ⁇ m, and the single fiber diameter of the short fiber contained in the nonwoven fabric B layer was 17.4 ⁇ m.
• the kneading part length is 28% of the screw effectiveness.
• the kneading part was located on the discharge side from 1/3 of the effective screw length. There are three backflow sections along the way. Vent: 2 locations.
• the obtained polymer alloy chip is supplied to a uniaxial extrusion-type melting apparatus for a staple spinning machine, and melt spinning is performed at a melting temperature of 235 ° C., a spinning temperature of 235 ° C. (a base surface temperature of 220 ° C.), and a spinning speed of 1200 m / min.
• the tow made of the polymer alloy fiber was subjected to mechanical crimping (12 peaks / 25 mm), and then cut into 51 mm short fibers.
• Nonwoven fabric A layer The short fiber was opened with a card and then made into a web with a cross-wrap weber. This web was entangled with a high-pressure water stream under the conditions of pressure: 3 MPa and speed of 1.0 m / min to obtain a nonwoven fabric of 62 g / m 2 .
• Nonwoven fabric B layer Polyethylene terephthalate cut fiber manufactured by Toray Industries, Inc. (variety: T471 monofilament 1.6 dtex, cut length 51 mm) was opened with a card, and then made into a web with a cross wrap weber. This web was entangled with a high-pressure water stream under the conditions of pressure: 3 MPa and speed of 1.0 m / min to obtain a nonwoven fabric B layer of 50 g / m 2 .
• the non-woven fabric A layer and non-woven fabric B layer obtained above were laminated, and further entangled and integrated with a high-pressure water stream under conditions of a pressure of 10 MPa and a speed of 1.0 m / min to obtain a laminated non-woven fabric.
• this laminated nonwoven fabric was dried at 110 ° C.
• the above laminated nonwoven fabric is treated with a 1% sodium hydroxide aqueous solution at a temperature of 95 ° C., a bath ratio (laminated nonwoven fabric / sodium hydroxide aqueous solution) 1/40 (mass ratio), and a treatment time of 40 minutes.
• the sea component (poly L lactic acid component) in the polymer alloy fibers contained in the nonwoven fabric A layer is removed from the seam, and then this laminated nonwoven fabric is laminated using a set machine.
• a heat treatment was performed at 130 ° C. for 5 minutes while spreading the nonwoven fabric by 3% to develop crimps in the latent crimped yarn contained in the nonwoven fabric A layer.
• the basis weight of the obtained laminated nonwoven fabric was 75 g / m 2 .
• the resulting laminated nonwoven fabric has an elastic recovery rate of 51.9%, a coefficient of static friction of the laminated nonwoven fabric surface A of 1.70, a water retention rate of 5.6 mass times, a breaking strength of 130 N, and a polymer alloy contained in the nonwoven fabric A layer.
• the single fiber diameter of the fibers was 0.15 ⁇ m, and the single fiber diameter of the short fibers contained in the nonwoven fabric B layer was 17.4 ⁇ m.
• Nonwoven fabric A layer A commercially available 2.2 decitex, 51 mm long bimetallic fiber was opened with a card and then made into a web with a cross-wrap weber. This web was entangled with a high-pressure water stream under the conditions of a pressure of 3 MPa and a speed of 1.0 m / min to obtain a nonwoven fabric A layer of 20 g / m 2 .
• Nonwoven fabric B layer Polyethylene terephthalate cut fiber manufactured by Toray Industries, Inc. (variety: T471 monofilament 1.6 dtex, cut length 51 mm) was opened with a card, and then made into a web with a cross wrap weber. This web was entangled with a high-pressure water stream under the conditions of pressure: 3 MPa and speed of 1.0 m / min to obtain a nonwoven fabric B layer of 50 g / m 2 .
• the non-woven fabric A layer and the non-woven fabric B layer obtained above are laminated, and further entangled by high-pressure water flow under the conditions of pressure: 10 MPa and speed of 1.0 m / min to obtain a laminated non-woven fabric having a basis weight of 70 g / m 2. It was.
• the resulting laminated nonwoven fabric has an elastic recovery rate of 82%, a coefficient of static friction of the laminated nonwoven fabric surface A of 0.72, a water retention rate of 6.3 times mass, a breaking strength of 24 N, and the bimetallic fibers contained in the nonwoven fabric A layer.
• the yarn fiber diameter was 20.4 ⁇ m, and the single yarn fiber diameter of the short fibers contained in the nonwoven fabric B layer was 17.4 ⁇ m.
• the nonwoven fabric obtained had an elastic recovery rate of 37%, a coefficient of static friction on both sides of the nonwoven fabric of 0.45, a water retention rate of 15.1 mass times, a breaking strength of 78 N, and the single yarn fiber diameter of the fibers contained in the nonwoven fabric was 17. .4 ⁇ m.
• Example 2 to 10 Laminated nonwoven fabrics of Examples 2 to 10 were obtained in the same manner as in Example 1 except that the configurations shown in Table 1 were used.
• the laminated nonwoven fabric of Example 2 is obtained by mixing the same crimped fiber as Example 1 and polyethylene terephthalate cut fiber (variety: T471, single yarn 1.6 dtex, cut length 51 mm) by Toray Industries, Ltd. into the nonwoven fabric A layer. It was prepared in the same manner as in Example 1 except that the content of the crimped fiber was changed to 80% by mass.
• the stretched elastic recovery rate and static friction coefficient of the obtained laminated nonwoven fabric were both inferior to the stretched elastic recovery rate and static friction coefficient of the laminated nonwoven fabric of Example 1.
• the performance evaluation of the laminated nonwoven fabric of Example 2 was as excellent as 7.
• the laminated nonwoven fabric of Example 3 was prepared in the same manner as in Example 2 except that the content of crimped fibers contained in the nonwoven fabric A layer was changed to 55% by mass.
• the stretched elastic recovery rate and static friction coefficient of the obtained laminated nonwoven fabric were both inferior to the stretched elastic recovery rate and static friction coefficient of the laminated nonwoven fabric of Example 2.
• the performance evaluation of the laminated nonwoven fabric of Example 3 was slightly superior to 6.
• the laminated nonwoven fabric of Example 10 was created by the same method as Example 1 except that the basis weight of the nonwoven fabric B layer was 24 g / m 2 .
• the breaking strength of the obtained laminated nonwoven fabric was slightly inferior to that of the laminated nonwoven fabric of Example 1, but it was not inconvenient to use this laminated nonwoven fabric for a face mask.
• the obtained laminated nonwoven fabric was lighter and more handleable than Example 1. Moreover, the performance evaluation of the laminated nonwoven fabric of Example 7 was as excellent as 9.
• the laminated nonwoven fabric of Example 5 was prepared in the same manner as in Example 10 except that the single yarn fiber diameter of the crimped fibers contained in the nonwoven fabric A layer was changed to 2.5 ⁇ m.
• the stretched elastic recovery rate of the laminated nonwoven fabric of Example 10 was superior to the stretched elastic recovery rate of the laminated nonwoven fabric of Example 5.
• the performance evaluation of the laminated nonwoven fabric of Example 5 was as excellent as 8.
• the laminated nonwoven fabric of Example 4 was prepared in the same manner as in Example 5 except that the basis weight of the nonwoven fabric A layer was changed to 16 g / m 2 .
• the stretched elastic recovery rate of the laminated nonwoven fabric of Example 5 was superior to that of the laminated nonwoven fabric of Example 4.
• the performance evaluation of the laminated nonwoven fabric of Example 4 was somewhat excellent as 5.
• the laminated nonwoven fabric of Example 6 was prepared in the same manner as in Example 4 except that the single yarn fiber diameter of the crimped fibers contained in the nonwoven fabric A layer was changed to 3.5 ⁇ m.
• the stretched elastic recovery rate of the laminated nonwoven fabric of Example 6 was superior to the stretched elastic recovery rate of the laminated nonwoven fabric of Example 4.
• the performance evaluation of the laminated nonwoven fabric of Example 6 was as excellent as 7.
• Example 7 The laminated nonwoven fabric of Example 7 was prepared in the same manner as in Example 5 except that the single yarn fiber diameter of the crimped fibers contained in the nonwoven fabric A layer was changed to 3.5 ⁇ m.
• the stretched elastic recovery rate of the laminated nonwoven fabric of Example 7 was equivalent to the stretched elastic recovery rate of the laminated nonwoven fabric of Example 5.
• the performance evaluation of the laminated nonwoven fabric of Example 7 was as excellent as 9.
• the laminated nonwoven fabric of Example 8 was prepared in the same manner as in Example 6 except that the single yarn fiber diameter of the crimped fibers contained in the nonwoven fabric A layer was changed to 4.9 ⁇ m.
• the stretched elastic recovery rate of the laminated nonwoven fabric of Example 8 was equivalent to the stretched elastic recovery rate of the laminated nonwoven fabric of Example 6.
• the performance evaluation of the laminated nonwoven fabric of Example 8 was as excellent as 8.
• the laminated nonwoven fabric of Example 9 was prepared in the same manner as in Example 8 except that the basis weight of the nonwoven fabric A layer was changed to 20 g / m 2 .
• the stretched elastic recovery rate of the laminated nonwoven fabric of Example 9 was superior to the stretched elastic recovery rate of the laminated nonwoven fabric of Example 8.
• the performance evaluation of the laminated nonwoven fabric of Example 9 was as excellent as 9.
• Example 11 The laminated nonwoven fabric of Example 11 was prepared in the same manner as in Example 10 except that the single fiber diameter of the short fibers contained in the nonwoven fabric B layer was changed to 11.5 ⁇ m. Since the single yarn fineness diameter contained in the B layer became thin, the card passing ability was slightly poor. The breaking strength of the laminated nonwoven fabric of Example 10 was superior to that of the laminated nonwoven fabric of Example 11. Moreover, the performance evaluation of the laminated nonwoven fabric of Example 11 was as excellent as 6.
• Comparative Examples 4 to 7 Laminated nonwoven fabrics of Comparative Examples 4 to 7 were obtained in the same manner as Comparative Example 2, except that each of the configurations described in Table 2 was used.

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