JP2020183587A - Latently bulky nonwoven fabric, bulky nonwoven fabric and face mask - Google Patents

Latently bulky nonwoven fabric, bulky nonwoven fabric and face mask Download PDF

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Publication number
JP2020183587A
JP2020183587A JP2019087073A JP2019087073A JP2020183587A JP 2020183587 A JP2020183587 A JP 2020183587A JP 2019087073 A JP2019087073 A JP 2019087073A JP 2019087073 A JP2019087073 A JP 2019087073A JP 2020183587 A JP2020183587 A JP 2020183587A
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Prior art keywords
woven fabric
shrinkable
fibers
nonwoven fabric
bulky
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JP2019087073A
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治貴 清水
Haruki Shimizu
治貴 清水
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Japan Exlan Co Ltd
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Japan Exlan Co Ltd
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Priority to JP2019087073A priority Critical patent/JP2020183587A/en
Priority to KR1020200032048A priority patent/KR20200126893A/en
Priority to CN202010193830.6A priority patent/CN111850831A/en
Publication of JP2020183587A publication Critical patent/JP2020183587A/en
Pending legal-status Critical Current

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    • 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
    • D04H1/50—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 treatment to produce shrinking, swelling, crimping or curling of fibres
    • 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
    • D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282—Addition polymers
    • D04H1/43—Acrylonitrile series
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D44/00—Other cosmetic or toiletry articles, e.g. for hairdressers' rooms
    • A45D44/002—Masks for cosmetic treatment of the face
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
    • A61K8/0212—Face masks
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • A61K8/8141—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • A61K8/8147—Homopolymers or copolymers of acids; Metal or ammonium salts thereof, e.g. crotonic acid, (meth)acrylic acid; Compositions of derivatives of such polymers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q19/00—Preparations for care of the skin
    • 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
    • D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/425—Cellulose series
    • 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
    • D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/425—Cellulose series
    • D04H1/4258—Regenerated cellulose series
    • 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
    • D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4266—Natural fibres not provided for in group D04H1/425
    • 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
    • D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282—Addition polymers
    • 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
    • D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4326—Condensation or reaction polymers
    • D04H1/4334—Polyamides
    • 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
    • D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4326—Condensation or reaction polymers
    • D04H1/435—Polyesters
    • 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
    • D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • 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
    • D04H1/492—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 by fluid jet
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D10B2321/08—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of unsaturated carboxylic acids or unsaturated organic esters, e.g. polyacrylic esters, polyvinyl acetate

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Birds (AREA)
  • Epidemiology (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dermatology (AREA)
  • Nonwoven Fabrics (AREA)
  • Cosmetics (AREA)

Abstract

To provide a nonwoven fabric that is soft when wet and can cause a good wearing feeling when utilized for a face mask or the like, in order to solve the problems that a nonwoven fabric of cellulosic fibers that is conventionally used for a face mask has large fatigue when wet and is paper-like and therefore hard to increase a liquid retaining amount, and also that a nonwoven fabric containing a certain amount or more amount of acrylonitrile-based fibers can have a large liquid retaining amount however causes a feel of hardness to the skin and has a problem in wear feeling.SOLUTION: A bulky nonwoven fabric is a single-layer nonwoven fabric comprising 20-60 wt% of shrinkable acrylic fibers in which shrinkage is developed and 40-80 wt% of non-shrinkable fibers, in which a part of the non-shrinkable fibers stands out upward on a front surface and a back surface of the nonwoven fabric.SELECTED DRAWING: None

Description

本発明は、潜在嵩高性不織布、該潜在嵩高性不織布の潜在嵩高性を顕在化させることによって得られる嵩高不織布に関する。さらに、本発明は前記嵩高不織布を用いて製造されるフェイスマスクに関する。 The present invention relates to a latent bulky non-woven fabric and a bulky non-woven fabric obtained by manifesting the latent bulkiness of the latent bulky non-woven fabric. Furthermore, the present invention relates to a face mask manufactured by using the bulky nonwoven fabric.

従来のフェイスマスク等に用いられる保液性不織布としては、セルロース系繊維を主体とするものが多く提案されている。例えば、特許文献１の［００１６］には、フェイスマスクシートに使用される好適な不織布として、クラフトパルプ３０重量％〜７０重量％に繊度０．８ｄｔｅｘを超えるレーヨン７０重量％〜３０重量％を配合した不織布が開示されている。 As the liquid-retaining non-woven fabric used for conventional face masks and the like, many have been proposed mainly made of cellulosic fibers. For example, in [0016] of Patent Document 1, 70% by weight to 30% by weight of rayon having a fineness of more than 0.8 dtex is blended with 30% by weight to 70% by weight of kraft pulp as a suitable non-woven fabric used for a face mask sheet. The non-woven fabric is disclosed.

また、特許文献２には、セルロース系繊維を含む不織布層の一方の表面又は両方の表面に、微細セルロース繊維不織布層が少なくとも一層または多層に積層され、セルロース系繊維を含む不織布層と一体化された不織布構造体に薬液が含浸された薬液含浸シートが開示されている。 Further, in Patent Document 2, the fine cellulose fiber nonwoven fabric layer is laminated at least one layer or multiple layers on one surface or both surfaces of the nonwoven fabric layer containing the cellulosic fiber, and is integrated with the nonwoven fabric layer containing the cellulose fiber. A chemical solution impregnated sheet in which a chemical solution is impregnated in a non-woven fabric structure is disclosed.

しかし、セルロース系繊維を用いた不織布は湿潤時のヘタリが大きく、ペーパーライクとなるため、保液量を増やしにくい。また、セルロース系繊維は繊維内部に液を吸い込んでしまう。このため、セルロース系繊維を用いた不織布は、例えばフェイスマスクに利用する場合、化粧水成分を多く含有できない上に、繊維内部に化粧水成分を取り込むため、肌への化粧水成分の移行量が少なくなるという問題点を有している。 However, the non-woven fabric using the cellulosic fiber has a large settling when wet and becomes paper-like, so it is difficult to increase the liquid retention amount. In addition, the cellulosic fiber sucks the liquid into the fiber. For this reason, when a non-woven fabric using cellulose fibers is used for a face mask, for example, it cannot contain a large amount of a lotion component, and the lotion component is taken into the inside of the fiber, so that the amount of the lotion component transferred to the skin is large. It has the problem of being reduced.

上記問題点に対して、本出願人は、特願２０１８−２０８５５６において、アクリロニトリル系繊維を一定量以上含有する不織布においては、繊維間に保持される化粧水量を多くすることができるとともに、繊維内部に取り込まれる化粧水量を少なくすることができることを明らかにしている。 In response to the above problems, in Japanese Patent Application No. 2018-208556, in the non-woven fabric containing acrylonitrile-based fibers in a certain amount or more, the amount of cosmetic water retained between the fibers can be increased and the inside of the fibers can be increased. It has been clarified that the amount of lotion taken into the skin can be reduced.

特開２００８−０９５２２３号公報Japanese Unexamined Patent Publication No. 2008-09523 特開２０１４−２０５９２４号公報Japanese Unexamined Patent Publication No. 2014-205924

しかし、本出願人においてさらなる開発を進めた結果、特願２０１８−２０８５５６の技術におけるフェイスマスクは、保液性や肌への化粧水成分の移行量には優れるものの、使用するに際して肌に硬さを感じるものであり、着用感に課題を有するものであることが判明した。 However, as a result of further development by the applicant, the face mask in the technique of Japanese Patent Application No. 2018-208556 is excellent in liquid retention and the amount of transfer of the lotion component to the skin, but is hard on the skin when used. It was found that there was a problem in wearing feeling.

本発明は、かかる新たな課題に鑑みて創案されたものであり、その目的は、湿潤時においても柔らかく、フェイスマスク等に利用した際に、良好な着用感を感じることのできる不織布を提供することにある。 The present invention has been devised in view of such a new problem, and an object of the present invention is to provide a non-woven fabric which is soft even when wet and can feel a good wearing feeling when used as a face mask or the like. There is.

本発明者は、上述の目的を達成するために鋭意検討を進めた結果、不織布の構成繊維として収縮性アクリル繊維と非収縮性繊維を混用し、該収縮性アクリル繊維を収縮発現させ、非収縮性繊維をたわませて不織布の表層に浮き出させることにより、湿潤時においても柔らかさを感じられる不織布が得られることを見出し、本発明に到達した。 As a result of diligent studies to achieve the above-mentioned object, the present inventor mixes shrinkable acrylic fiber and non-shrinkable fiber as constituent fibers of the non-woven fabric, shrinks the shrinkable acrylic fiber, and causes non-shrinkage. We have found that a non-woven fabric that feels soft even when wet can be obtained by bending the sex fibers and embossing them on the surface layer of the non-woven fabric, and reached the present invention.

すなわち、本発明は以下の手段により達成される。
（１） 沸水収縮率が５〜４５％の収縮性アクリル繊維２０〜６０重量％と非収縮性繊維４０〜８０重量％を含有し、かつ、目付けが１０〜１３５ｇ／ｍ２であることを特徴とする潜在嵩高性不織布。
（２） 単層であることを特徴とする（１）に記載の潜在嵩高性不織布。
（３） スパンレース加工構造を有することを特徴とする（１）または（２）に記載の潜在嵩高性不織布。
（４） 熱融着性繊維を含有しないことを特徴とする（１）〜（３）のいずれかに記載の潜在嵩高性不織布。
（５） 収縮性アクリル繊維の繊度が０．３〜６．０ｄｔｅｘであることを特徴とする（１）〜（４）のいずれかに記載の潜在嵩高性不織布。
（６） 非収縮性繊維がアクリル繊維であることを特徴とする（１）〜（５）のいずれかに記載の潜在嵩高性不織布。
（７） 非収縮性繊維の繊度が０．３〜６．０ｄｔｅｘであることを特徴とする（１）〜（６）のいずれかに記載の潜在嵩高性不織布。
（８） （１）〜（７）のいずれかの不織布を収縮処理することによって得られる嵩高不織布。
（９） 収縮発現した収縮性アクリル繊維２０〜６０重量％と非収縮性繊維４０〜８０重量％を含む単層の不織布であって、不織布の表面と裏面に一部の非収縮性繊維が浮き出していることを特徴とする嵩高不織布。
（１０） （８）または（９）に記載の嵩高不織布を含むフェイスマスク。
（１１） （１０）に記載のフェイスマスクに化粧水が充填されていることを特徴とする化粧水充填済みフェイスマスク。 That is, the present invention is achieved by the following means.
(1) It is characterized by containing 20 to 60% by weight of shrinkable acrylic fiber having a boiling water shrinkage rate of 5 to 45% and 40 to 80% by weight of non-woven fiber, and having a basis weight of 10 to 135 g / m 2. Latent bulky non-woven fabric.
(2) The latent bulky non-woven fabric according to (1), which is a single layer.
(3) The latent bulky nonwoven fabric according to (1) or (2), which has a spunlaced structure.
(4) The latent bulky non-woven fabric according to any one of (1) to (3), which does not contain heat-sealing fibers.
(5) The latent bulky non-woven fabric according to any one of (1) to (4), wherein the shrinkage acrylic fiber has a fineness of 0.3 to 6.0 dtex.
(6) The latent bulky non-woven fabric according to any one of (1) to (5), wherein the non-shrinkable fiber is an acrylic fiber.
(7) The latent bulky non-woven fabric according to any one of (1) to (6), wherein the non-shrinkable fiber has a fineness of 0.3 to 6.0 dtex.
(8) A bulky non-woven fabric obtained by shrinking any of the non-woven fabrics (1) to (7).
(9) A single-layer non-woven fabric containing 20 to 60% by weight of shrinkable acrylic fibers and 40 to 80% by weight of non-shrinkable fibers, and some non-shrinkable fibers are embossed on the front and back surfaces of the non-woven fabric. A bulky non-woven fabric characterized by being
(10) A face mask containing the bulky non-woven fabric according to (8) or (9).
(11) A face mask filled with a lotion, wherein the face mask according to (10) is filled with a lotion.

本発明の嵩高不織布は、不織布の表面と裏面に一部の非収縮性繊維が浮き出しているものである。かかる本発明の嵩高不織布においては、湿潤させた場合においても、柔らかさが感じられるものである。かかる特徴を有する本発明の嵩高不織布は、例えば、フェイスマスクのように湿潤させて肌に接触させるような用途に適用した場合において、硬さを感じさせず、快適な着用感を得られるものである。 In the bulky non-woven fabric of the present invention, some non-shrinkable fibers are projected on the front surface and the back surface of the non-woven fabric. In the bulky non-woven fabric of the present invention, softness is felt even when moistened. The bulky non-woven fabric of the present invention having such characteristics does not give a feeling of hardness when applied to an application such as a face mask in which it is moistened and brought into contact with the skin, and a comfortable wearing feeling can be obtained. is there.

以下に本発明を詳細に説明する。本発明の潜在嵩高性不織布は収縮性アクリル繊維と非収縮性繊維を構成繊維として含有するものである。かかる収縮性アクリル繊維としては、後述する方法で測定した沸水収縮率が５〜４５％、好ましくは１０〜４５％、より好ましくは１５〜４０％である。沸水収縮率が上記下限に満たない場合には嵩高性が不十分となり、柔らかさが得られず、上限を超える場合には、不織布の拘束力のために、本来の収縮率まで収縮せずに残留歪みとなったり、収縮後の不織布の密度が高くなりすぎて十分な保液量が得られなかったりすることがある。なお、かかる収縮性アクリル繊維は複数種を使用してもよい。 The present invention will be described in detail below. The latent bulky non-woven fabric of the present invention contains shrinkable acrylic fibers and non-shrinkable fibers as constituent fibers. As such a shrinkable acrylic fiber, the boiling water shrinkage rate measured by the method described later is 5 to 45%, preferably 10 to 45%, and more preferably 15 to 40%. If the boiling water shrinkage rate is less than the above lower limit, the bulkiness becomes insufficient and softness cannot be obtained, and if it exceeds the upper limit, the non-woven fabric does not shrink to the original shrinkage rate due to the binding force of the non-woven fabric. Residual strain may occur, or the density of the non-woven fabric after shrinkage may become too high to obtain a sufficient liquid retention amount. A plurality of types of such shrinkable acrylic fibers may be used.

上記収縮性アクリル繊維の繊度は、好ましくは０．３〜６．０ｄｔｅｘ、より好ましくは０．５〜３．０ｄｔｅｘ、さらに好ましくは０．９〜２．４ｄｔｅｘである。繊度が上記下限に満たない場合には加工の際に繊維の構成本数が増えるために拘束力が強くなり不織布が硬くなる恐れがあり、上限を超える場合には、肌と接触した際にチクチクするなど着用感が悪くなる恐れがある。 The fineness of the shrinkable acrylic fiber is preferably 0.3 to 6.0 dtex, more preferably 0.5 to 3.0 dtex, and further preferably 0.9 to 2.4 dtex. If the fineness is less than the above lower limit, the number of constituent fibers increases during processing, which may increase the binding force and harden the non-woven fabric. If the fineness exceeds the upper limit, it will tingle when it comes into contact with the skin. There is a risk that the wearing feeling will be worse.

上記収縮性アクリル繊維の繊維長は、好ましくは３２〜１５０ｍｍ、より好ましくは３８〜５１ｍｍである。繊維長が上記下限に満たない場合や上限を超える場合には不織布製造工程におけるカード工程を通常のカード機で行うことができず、ローラー間のゲージ変更やパーツ変更などの紡績設備の改造が必要となる場合がある。 The fiber length of the shrinkable acrylic fiber is preferably 32 to 150 mm, more preferably 38 to 51 mm. If the fiber length is less than the above lower limit or exceeds the upper limit, the card process in the non-woven fabric manufacturing process cannot be performed with a normal card machine, and it is necessary to modify the spinning equipment such as changing gauges between rollers and changing parts. May be.

また、本発明に採用する非収縮性繊維としては、沸水収縮率が併用する収縮性アクリル繊維よりも小さいものであって、好ましくは５％未満、より好ましくは３％以下、さらに好ましくは１％以下である。沸水収縮率が上記上限を超える場合には収縮性アクリル繊維との収縮率の差が小さくなり、嵩高性が不十分となって柔らかさが感じられなくなる恐れがある。なお、かかる非収縮繊維は、全く収縮しないものであってもよく、また、複数種を使用してもよい。 The non-shrinkable fiber used in the present invention has a boiling water shrinkage rate smaller than that of the shrinkable acrylic fiber used in combination, and is preferably less than 5%, more preferably 3% or less, still more preferably 1%. It is as follows. When the boiling water shrinkage rate exceeds the above upper limit, the difference in shrinkage rate from the shrinkable acrylic fiber becomes small, and the bulkiness may be insufficient and the softness may not be felt. The non-shrink fiber may not shrink at all, or a plurality of types may be used.

上記非収縮性繊維としては、綿、麻、羊毛、獣毛（モヘア、カシミヤ、キャメル、アルパカ、アンゴラ等）などの天然繊維、レーヨン、キュプラなどの再生繊維、アセテート、プロミックスなどの半合成繊維、アクリル、ナイロン、ポリエステルなどの合成繊維などを採用することができる。特に非収縮繊維は、収縮性アクリル繊維の収縮発現により、不織布の表面と裏面に浮き出し、柔らかい触感を与える主要部となることから、湿潤時にもへたりにくく、嵩高性を維持できる素材であることが望ましい。かかる素材としてはアクリル繊維が好適である。 Examples of the non-shrinkable fibers include natural fibers such as cotton, linen, wool and animal hair (mohair, cashmere, camel, alpaca, angora, etc.), recycled fibers such as rayon and cupra, and semi-synthetic fibers such as acetate and promix. , Synthetic fibers such as acrylic, nylon and polyester can be adopted. In particular, the non-shrinkable fiber is a material that does not easily settle even when wet and can maintain its bulkiness because it is the main part that rises on the front and back surfaces of the non-woven fabric due to the shrinkage of the shrinkable acrylic fiber and gives a soft touch. Is desirable. Acrylic fiber is suitable as such a material.

また、非収縮性繊維の繊度としては、好ましくは０．３〜６．０ｄｔｅｘ、より好ましくは０．５〜３．０ｄｔｅｘである。繊度が上記下限に満たない場合には、湿潤時にへたりやすくなったり、単位重量あたりの繊維本数が多くなり繊維同士の拘束が強くなることによって嵩高性発現が不足したりするなどの不具合が起こりやすくなる。また、上限を超える場合には、柔らかさが十分に得られない場合がある。 The fineness of the non-shrinkable fiber is preferably 0.3 to 6.0 dtex, more preferably 0.5 to 3.0 dtex. If the fineness is less than the above lower limit, problems such as easy settling during wetting, a large number of fibers per unit weight and strong restraint between fibers, and insufficient expression of bulkiness occur. It will be easier. If the upper limit is exceeded, sufficient softness may not be obtained.

上記非収縮性繊維の繊維長は、上述した収縮アクリル繊維の場合と同様の理由から、好ましくは３２〜１５０ｍｍ、より好ましくは３８〜５１ｍｍである。 The fiber length of the non-shrinkable fiber is preferably 32 to 150 mm, more preferably 38 to 51 mm for the same reason as in the case of the shrinkable acrylic fiber described above.

本発明の潜在嵩高性不織布は、上述した収縮性アクリル繊維を２０〜６０重量％、好ましくは３０〜４０重量％含むものである。また、収縮性アクリル繊維の含有量が上記下限に満たない場合には収縮力が不足し十分かつ均一な嵩高性が得られず、上記上限を超える場合には収縮により不織布の表層部に浮き出す非収縮性繊維の量が少なくなって柔らかい触感を得られなくなる。 The latent bulky non-woven fabric of the present invention contains the above-mentioned shrinkable acrylic fiber in an amount of 20 to 60% by weight, preferably 30 to 40% by weight. Further, when the content of the shrinkable acrylic fiber is less than the above lower limit, the shrinkage force is insufficient and sufficient and uniform bulkiness cannot be obtained, and when it exceeds the above upper limit, it floats on the surface layer portion of the non-woven fabric due to shrinkage. The amount of non-woven fibers is reduced and a soft touch cannot be obtained.

また、本発明の潜在嵩高性不織布は、上述した非収縮性繊維を４０〜８０重量％、好ましくは６０〜７０重量％含むものである。非収縮性繊維の含有量が上記下限に満たない場合には収縮アクリル繊維の収縮により不織布の表層部に浮き出す非収縮性繊維の量が少なくなって柔らかい触感を得られなくなり、上記上限を超える場合には相対的に収縮性アクリル繊維の量が不足し十分かつ均一な嵩高性が得られなくなる。 Further, the latent bulky nonwoven fabric of the present invention contains the above-mentioned non-shrinkable fibers in an amount of 40 to 80% by weight, preferably 60 to 70% by weight. When the content of the non-shrinkable fiber is less than the above lower limit, the amount of the non-shrinkable fiber that emerges on the surface layer of the non-woven fabric is reduced due to the shrinkage of the shrinkable acrylic fiber, and a soft touch cannot be obtained, which exceeds the above upper limit. In that case, the amount of shrinkable acrylic fiber is relatively insufficient, and sufficient and uniform bulkiness cannot be obtained.

さらに、本発明の潜在嵩高性不織布には、上述した収縮性アクリル繊維と非収縮性繊維以外に、必要に応じて熱融着性繊維を含有させてもよい。熱融着性繊維は不織布の形態安定性の向上や毛羽の脱落抑制に有効である。一方で、熱融着性繊維は、収縮性アクリル繊維や非収縮性繊維を熱融着により拘束するため、柔らかさを低下させる要因ともなる。このため、できるだけ熱融着性繊維を使用しないことが望ましい。 Further, the latent bulky nonwoven fabric of the present invention may contain heat-sealing fibers, if necessary, in addition to the above-mentioned shrinkable acrylic fibers and non-shrinkable fibers. The heat-sealing fibers are effective in improving the morphological stability of the non-woven fabric and suppressing the fluff from falling off. On the other hand, the heat-sealing fibers restrain the shrinkable acrylic fibers and the non-shrinkable fibers by heat fusion, which is also a factor of lowering the softness. Therefore, it is desirable not to use heat-sealing fibers as much as possible.

また、本発明の潜在嵩高性不織布は、複数層が積層された構造であるよりも、単層構造であることが望ましい。複数層が積層された構造の場合には、各層での収縮度合いが異なると、収縮度合いの小さい層にしわや凹凸が発生しやすく、フェイスマスクなどでの使用に際し、触感を悪化させることがある。これに対して、不織布が単層構造の場合には、収縮性アクリル繊維と非収縮性繊維が混合されており、一体的な収縮となるため、非収縮性繊維が表層に浮き出すのみで、層が波打つような状態にはならないため、しわや凹凸が発生しにくい。なお、単層の場合においても、収縮性アクリル繊維と非収縮性繊維の混合に偏りがあると収縮後の表面状態が不均一となる恐れがあるため、不織布の製造においては収縮性アクリル繊維と非収縮性繊維をできるだけ均一に混合しておくことが望ましい。 Further, the latent bulky nonwoven fabric of the present invention preferably has a single-layer structure rather than a structure in which a plurality of layers are laminated. In the case of a structure in which a plurality of layers are laminated, if the degree of shrinkage in each layer is different, wrinkles and irregularities are likely to occur in the layer having a small degree of shrinkage, which may worsen the tactile sensation when used in a face mask or the like. .. On the other hand, when the non-woven fabric has a single-layer structure, the shrinkable acrylic fiber and the non-shrinkable fiber are mixed and become an integral shrinkage, so that the non-shrinkable fiber only emerges on the surface layer. Since the layers do not become wavy, wrinkles and irregularities are less likely to occur. Even in the case of a single layer, if the mixture of the shrinkable acrylic fiber and the non-shrinkable fiber is uneven, the surface state after shrinkage may become non-uniform. Therefore, in the production of the non-woven fabric, the shrinkable acrylic fiber is used. It is desirable to mix the non-shrinkable fibers as uniformly as possible.

さらに、本発明の潜在嵩高性不織布は、目付けが好ましくは１０〜１３５ｇ／ｍ２、より好ましくは１５〜１２０ｇ／ｍ２、さらに好ましくは２０〜１００ｇ／ｍ２である。目付けが上記下限に満たない場合には、収縮を発現させても嵩高性が不十分となり、柔らかさが得られないことがある。一方、目付けが上記上限を超える場合には、スパンレース加工の際に繊維同士の絡まりが強くなり、収縮が発現しにくくなるなど、繊維の拘束性が強いために嵩高性が不十分となり、フェイスマスクなどでの使用に際し、触感を悪化させることがある。 Further, the latent bulky nonwoven fabric of the present invention has a basis weight of preferably 10 to 135 g / m 2 , more preferably 15 to 120 g / m 2 , and even more preferably 20 to 100 g / m 2 . If the basis weight is less than the above lower limit, the bulkiness may be insufficient even if contraction is caused, and softness may not be obtained. On the other hand, when the basis weight exceeds the above upper limit, the fibers become entangled with each other during the spunlacing process, and shrinkage is less likely to occur. The fibers are strongly restrained, resulting in insufficient bulkiness and face. When used in a mask, etc., the tactile sensation may deteriorate.

また、本発明の潜在嵩高性不織布はスパンレース加工構造を有するものであることが望ましい。スパンレース加工における水流は微細で、かつその数も多いため、繊維同士の絡まりも強くなる。このため、上述した熱融着性繊維を使用しなくても形態安定性や毛羽脱落抑制の点で良好な特性を得ることが可能であり、熱融着性繊維による不織布の触感悪化も避けることができる。 Further, it is desirable that the latent bulky nonwoven fabric of the present invention has a spunlaced structure. Since the water flow in the spunlace processing is fine and the number is large, the entanglement between the fibers becomes strong. Therefore, it is possible to obtain good characteristics in terms of morphological stability and suppression of fluff loss without using the above-mentioned heat-sealing fibers, and it is possible to avoid deterioration of the feel of the non-woven fabric due to the heat-sealing fibers. Can be done.

なお、本発明の潜在嵩高性不織布の製造方法としては、上述の点からスパンレース法を採用することが望ましいが、必要に応じて、スパンレース法以外の製造方法を採用してもよい。かかる製造方法としては、カード機や抄紙機を用いてウェブを形成した後、該ウェブを交絡させて不織布を得るニードルパンチ法やステッチボンド法、あるいはウェブ内に含有させた熱融着繊維により繊維同士を接着させて不織布を得るサーマルボンド法などが挙げられる。 As the method for producing the latent bulky nonwoven fabric of the present invention, it is desirable to adopt the spunlace method from the above points, but if necessary, a production method other than the spunlace method may be adopted. As such a manufacturing method, a web is formed using a card machine or a paper machine, and then the web is entangled to obtain a non-woven fabric, a needle punch method or a stitch bond method, or a heat-sealing fiber contained in the web. Examples thereof include a thermal bond method in which non-woven fabrics are obtained by adhering them together.

上述してきた本発明の潜在嵩高性不織布は収縮処理を施すことにより、該不織布を構成する収縮性アクリル繊維が収縮して、嵩高性が発現し、嵩高不織布とすることができる。かかる収縮処理の方法としては、本発明の潜在嵩高性不織布を沸水中に２０分以上浸漬する方法や湿潤状態または乾燥状態の潜在嵩高性不織布を１５０〜２００℃の空気雰囲気下で数十秒から数分間加熱する方法を挙げることができる。 By subjecting the latent bulky non-woven fabric of the present invention described above to a shrinkage treatment, the shrinkable acrylic fibers constituting the non-woven fabric are shrunk to develop bulkiness, and the bulky non-woven fabric can be obtained. As a method of such shrinkage treatment, a method of immersing the latent bulky nonwoven fabric of the present invention in boiling water for 20 minutes or more, or a method of immersing the latent bulky nonwoven fabric in a wet state or a dry state in an air atmosphere of 150 to 200 ° C. for several tens of seconds. A method of heating for several minutes can be mentioned.

また、上述してきた本発明の潜在嵩高性不織布に収縮処理を施して得られた嵩高不織布は、収縮発現した収縮性アクリル繊維２０〜６０重量％と非収縮性繊維４０〜８０重量％を含み、単層の不織布の表面と裏面に一部の非収縮性繊維が浮き出している構造を有するものとなる。また、かかる潜在嵩高性不織布を用いることにより、収縮によるしわや凹凸の発生が抑制された不織布を得ることができる。 Further, the bulky nonwoven fabric obtained by subjecting the latent bulky nonwoven fabric of the present invention described above to a shrinkage treatment contains 20 to 60% by weight of shrinkable acrylic fibers and 40 to 80% by weight of non-shrinkable fibers. It has a structure in which some non-shrinkable fibers are raised on the front surface and the back surface of the single-layer non-woven fabric. Further, by using such a latent bulky non-woven fabric, it is possible to obtain a non-woven fabric in which wrinkles and unevenness due to shrinkage are suppressed.

また、上述の嵩高不織布は、密度が好ましくは０．０１〜０．１５ｇ／ｃｍ３、より好ましくは０．０３〜０．１０ｇ／ｃｍ３、さらに好ましくは０．０４〜０．０７ｇ／ｃｍ３である。嵩高不織布の密度が上記下限に満たない場合には、繊維間の間隙が広くなりすぎるために、取り込まれた化粧水等が流出し易く、該不織布をフェイスマスクとした際には液だれし易くなる恐れがある。また、上記上限を超える場合には、間隙が狭くなりすぎるために、化粧水等の保持量が不十分となる可能性がある。 Further, bulky nonwoven fabric described above, the density is preferably 0.01~0.15g / cm 3, more preferably 0.03~0.10g / cm 3, more preferably 0.04~0.07g / cm 3 Is. When the density of the bulky non-woven fabric is less than the above lower limit, the gap between the fibers becomes too wide, so that the taken-in lotion or the like easily flows out, and when the non-woven fabric is used as a face mask, dripping easily occurs. There is a risk of becoming. On the other hand, if the above upper limit is exceeded, the gap may become too narrow, and the amount of the lotion or the like retained may be insufficient.

本発明の嵩高不織布は、化粧水を含有させることで、首、肩、手など全身の様々な場所に使用することのできる美容シートとして好適に利用することができる。例えば、顔を被覆するために適した形状に切り出すことで、フェイスマスクとして利用することもできる。 By containing a lotion, the bulky non-woven fabric of the present invention can be suitably used as a beauty sheet that can be used in various places of the whole body such as the neck, shoulders and hands. For example, it can be used as a face mask by cutting it into a shape suitable for covering the face.

かかるフェイスマスクの構造としては、コストの面から本発明の嵩高不織布１枚からなる単層であっても良いが、他の不織布、布帛またはフィルムなどと積層し、２層以上の複数層で構成されていても良い。例えば、本発明の嵩高不織布を肌に触れる側に配し、その上にポリエステル不織布を積層した構造とすることで、不織布の強度が上がり、化粧水を取り込んだ湿潤状態であっても、折り曲げたり、開いたりといった取り扱いが容易となる。 The structure of such a face mask may be a single layer composed of one bulky nonwoven fabric of the present invention from the viewpoint of cost, but is composed of two or more layers by laminating with another nonwoven fabric, cloth, film or the like. It may have been done. For example, by arranging the bulky non-woven fabric of the present invention on the side that comes into contact with the skin and laminating a polyester non-woven fabric on it, the strength of the non-woven fabric is increased and it can be bent even in a wet state in which lotion is taken in. , Easy to open and handle.

上記のようにして、本発明の嵩高不織布を含むフェイスマスクは、乾燥状態で販売され、消費者自身が化粧水をフェイスマスクに含浸させ、顔を被覆して使用することができる。また、上記の乾燥状態のフェイスマスクを、例えばアルミパウチのような袋に入れた後、その袋の中に化粧水を充填し密封することで、予め化粧水を含浸させたフェイスマスクとして販売してもよい。 As described above, the face mask containing the bulky non-woven fabric of the present invention is sold in a dry state, and the consumer can impregnate the face mask with a lotion and use it by covering the face. Further, the above-mentioned dried face mask is put in a bag such as an aluminum pouch, and then the bag is filled with a lotion and sealed to be sold as a face mask impregnated with the lotion in advance. You may.

以下、実施例により本発明を詳細に説明するが、本発明はこれらの実施例に限定されるものではない。なお、実施例中の評価に用いた測定方法は、以下の通りである。また、実施例中の部及び百分率は特に限定が無い限り重量基準で示す。 Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited to these Examples. The measurement method used for the evaluation in the examples is as follows. In addition, the parts and percentages in the examples are shown on a weight basis unless otherwise specified.

＜沸水収縮率＞
沸水処理前の試料に荷重（０．１ｇ／ｄｔｅｘ）をかけ、一定間隔の原長さ（Ｌ１［ｍｍ］）を計測し、該試料を沸水にて１５分間処理し、乾燥後、試料に荷重（０．１ｇ／ｄｔｅｘ）をかけ、変化長さ（Ｌ２［ｍｍ］）を計測し、次式により収縮率を求める。
沸水収縮率（％）＝｛（Ｌ１−Ｌ２）／Ｌ１｝×１００ <Boiling water shrinkage rate>
A load (0.1 g / dtex) is applied to the sample before boiling water treatment, the original length (L1 [mm]) at regular intervals is measured, the sample is treated with boiling water for 15 minutes, dried, and then the sample is loaded. Multiply by (0.1 g / dtex), measure the change length (L2 [mm]), and obtain the shrinkage rate by the following formula.
Boiling water shrinkage rate (%) = {(L1-L2) / L1} x 100

＜繊度、繊維長＞
試料を２０℃×６５％ＲＨ雰囲気下の恒温恒湿器に２４時間入れておく。このようにして調湿させた繊維をＪＩＳ Ｌ １０１５：２０１０に記載された正量繊度Ａ法および平均繊維長ステープルダイヤグラム法（Ａ法）に準じて測定する。 <Fiberity, fiber length>
Place the sample in a thermo-hygrostat in a 20 ° C. × 65% RH atmosphere for 24 hours. The fibers whose humidity is adjusted in this manner are measured according to the positive amount fineness A method and the average fiber length staple diagram method (A method) described in JIS L 1015: 2010.

＜不織布の目付け、密度＞
不織布試料から１０ｃｍ×１０ｃｍの試験片を採取し、２０℃×６５％ＲＨ雰囲気下の恒温恒湿器に２４時間入れて調湿した後、重量（Ｗ［ｇ］）を測定する。また、試験片上の任意の５点の厚みを測定し、その平均厚み（Ｔ［ｃｍ］）を算出する。以上の結果から、次式によって算出する。
目付け［ｇ／ｍ２］＝Ｗ／（０．１×０．１）
密度［ｇ／ｃｍ３］＝Ｗ／（１０×１０×Ｔ） <Metsuke and density of non-woven fabric>
A 10 cm × 10 cm test piece is taken from the non-woven fabric sample, placed in a constant temperature and humidity chamber at 20 ° C. × 65% RH for 24 hours to adjust the humidity, and then the weight (W [g]) is measured. In addition, the thickness of any five points on the test piece is measured, and the average thickness (T [cm]) thereof is calculated. From the above results, it is calculated by the following formula.
Metsuke [g / m 2 ] = W / (0.1 × 0.1)
Density [g / cm 3 ] = W / (10 × 10 × T)

＜不織布の湿潤時の嵩高性維持性能＞
収縮発現処理を施し、乾燥させた不織布試料を準備し、上記＜不織布の目付け、密度＞に記載の方法と同様の方法で未吸水時の平均厚みを算出する。次に該不織布試料を十分に吸水させ、吊り下げた状態で５分間放置することで、水滴が落ちなくなった状態とし、上記と同様にして吸水状態の平均厚みを算出する。得られた数値より次式によって厚み減少率を算出する。厚み減少率が小さいほど、湿潤時でも嵩高性が保たれていることを示す。
厚み減少率［％］＝（未吸水時の平均厚み−吸水状態の平均厚み）／未吸水時の平均厚み <Maintenance of bulkiness when the non-woven fabric is wet>
A non-woven fabric sample that has been subjected to shrinkage development treatment and dried is prepared, and the average thickness when not absorbing water is calculated by the same method as that described in <Metsuke and Density of Non-woven Fabric> above. Next, the non-woven fabric sample is sufficiently absorbed in water and left to stand for 5 minutes in a suspended state to prevent water droplets from falling, and the average thickness in the water-absorbing state is calculated in the same manner as described above. From the obtained numerical values, the thickness reduction rate is calculated by the following formula. The smaller the thickness reduction rate, the more bulky the product is maintained even when wet.
Thickness reduction rate [%] = (average thickness when not absorbing water-average thickness when absorbing water) / average thickness when not absorbing water

＜不織布の湿潤時の触感＞
不織布試料に化粧水（株式会社資生堂「肌水 ナチュラルスキンローション 青ラベル」）を十分に吸収させる。次に、化粧水を吸水させた不織布試料を吊り下げた状態で５分間放置することで、水滴が落ちなくなった状態とする。このようにして調整した試料について、肌に貼り付けたときの触感を５名の熟練技術者により以下の５段階で評価し、最も多い評価を評価結果とする。
◎：非常に柔らかい、○：柔らかい、△：やや柔らかい、×：やや硬い、××：硬い <Tactile sensation when the non-woven fabric is wet>
Allow the non-woven fabric sample to sufficiently absorb the lotion (Shiseido Co., Ltd. "Skin Water Natural Skin Lotion Blue Label"). Next, the non-woven fabric sample absorbed with the lotion is left to stand for 5 minutes in a suspended state so that the water droplets do not fall off. With respect to the sample prepared in this way, the tactile sensation when attached to the skin is evaluated by five skilled technicians on the following five stages, and the most evaluated evaluation is taken as the evaluation result.
◎: Very soft, ○: Soft, △: Slightly soft, ×: Slightly hard, XX: Hard

［実施例１］
収縮性アクリル繊維（日本エクスラン工業社製、沸水収縮率１９％、０．４ｄｔｅｘ、３８ｍｍ）と非収縮性アクリル繊維（日本エクスラン工業社製、沸水収縮率３％、０．９ｄｔｅｘ、５１ｍｍ）を３０：７０の重量比として均一に混合してカードウェブを作製し、該カードウェブにスパンレース加工を施して潜在嵩高性不織布を得る。次に、スパンレース加工後の湿潤状態の潜在嵩高性不織布を１５０℃の雰囲気下で１分間加熱し、収縮性アクリル繊維の収縮を発現させることにより、嵩高不織布を得る。 [Example 1]
30 shrinkable acrylic fibers (manufactured by Japan Exlan Co., Ltd., boiling water shrinkage rate 19%, 0.4 dtex, 38 mm) and non-shrinkable acrylic fibers (manufactured by Japan Exlan Co., Ltd., boiling water shrinkage rate 3%, 0.9 dtex, 51 mm) A card web is produced by uniformly mixing at a weight ratio of: 70, and the card web is spunlaced to obtain a latent bulky non-woven fabric. Next, the latent bulky non-woven fabric in a wet state after the spunlace processing is heated in an atmosphere of 150 ° C. for 1 minute to cause shrinkage of the shrinkable acrylic fibers to obtain a bulky non-woven fabric.

なお、スパンレース加工は川之江造機株式会社製の多目的不織布製造装置を使用し、ウォータージェットのノズルは０．１ｍｍφ×１ｍｍピッチのものを３本使用した。３本のノズルの水圧はそれぞれ、１本目２ＭＰａ、２本目５ＭＰａ、３本目５ＭＰａとし、表裏両面からウォータージェットを打った。 For the span race processing, a multipurpose non-woven fabric manufacturing apparatus manufactured by Kawanoe Zoki Co., Ltd. was used, and three water jet nozzles having a pitch of 0.1 mmφ × 1 mm were used. The water pressure of the three nozzles was 2 MPa for the first nozzle, 5 MPa for the second nozzle, and 5 MPa for the third nozzle, and water jets were struck from both the front and back surfaces.

［実施例２］
実施例１において、収縮性アクリル繊維と非収縮性アクリル繊維の重量比を５０：５０に変更すること以外は同様にして、嵩高不織布を得る。 [Example 2]
A bulky nonwoven fabric is obtained in the same manner as in Example 1 except that the weight ratio of the shrinkable acrylic fiber to the non-shrinkable acrylic fiber is changed to 50:50.

［実施例３］
実施例２において、収縮性アクリル繊維を沸水収縮率１１％、０．９ｄｔｅｘ、５１ｍｍの収縮性アクリル繊維（日本エクスラン工業社製）に変更すること以外は同様にして、嵩高不織布を得る。 [Example 3]
In Example 2, a bulky nonwoven fabric is obtained in the same manner except that the shrinkable acrylic fiber is changed to a shrinkable acrylic fiber (manufactured by Japan Exlan Co., Ltd.) having a boiling water shrinkage rate of 11%, 0.9 dtex, and 51 mm.

［実施例４］
実施例１において、潜在嵩高性不織布の目付がより高くなるようにすること以外は同様にして、嵩高不織布を得る。 [Example 4]
In Example 1, a bulky nonwoven fabric is obtained in the same manner except that the basis weight of the latent bulky nonwoven fabric is made higher.

［実施例５］
実施例１において、非収縮性アクリル繊維を沸水収縮率３％、１．４ｄｔｅｘ、５１ｍｍのレーヨンに変更すること以外は同様にして、嵩高不織布を得る。 [Example 5]
A bulky nonwoven fabric is obtained in the same manner except that the non-shrinkable acrylic fiber is changed to rayon having a boiling water shrinkage rate of 3%, 1.4 dtex, and 51 mm in Example 1.

［実施例６］
実施例１において、収縮性アクリル繊維を沸水収縮率１９％、３ｄｔｅｘ、３８ｍｍの収縮性アクリル繊維（日本エクスラン工業社製）に変更すること以外は同様にして、嵩高不織布を得る。 [Example 6]
In Example 1, a bulky nonwoven fabric is obtained in the same manner except that the shrinkable acrylic fiber is changed to a shrinkable acrylic fiber (manufactured by Japan Exlan Co., Ltd.) having a boiling water shrinkage rate of 19%, 3 dtex, and 38 mm.

［実施例７］
実施例１において、非収縮性アクリル繊維を沸水収縮率３％、３ｄｔｅｘ、５１ｍｍの非収縮性アクリル繊維（日本エクスラン工業社製）に変更すること以外は同様にして、嵩高不織布を得る。 [Example 7]
In Example 1, a bulky nonwoven fabric is obtained in the same manner except that the non-shrinkable acrylic fiber is changed to a non-shrinkable acrylic fiber (manufactured by Japan Exlan Co., Ltd.) having a boiling water shrinkage rate of 3%, 3 dtex, and 51 mm.

［比較例１］
実施例１において、収縮性アクリル繊維と非収縮性アクリル繊維の重量比を０：１００に変更する（すなわち、収縮性アクリル繊維を用いず、非収縮性アクリル繊維のみとする）こと以外は同様にして、不織布を得る。 [Comparative Example 1]
In the first embodiment, the weight ratio of the shrinkable acrylic fiber to the non-shrinkable acrylic fiber is changed to 0: 100 (that is, the shrinkable acrylic fiber is not used and only the non-shrinkable acrylic fiber is used). To obtain a non-woven fabric.

［比較例２］
実施例４において、潜在嵩高性不織布の目付がさらに高くなるようにすること以外は同様にして、不織布を得る。 [Comparative Example 2]
In Example 4, the non-woven fabric is obtained in the same manner except that the basis weight of the latent bulky non-woven fabric is further increased.

上述の実施例および比較例において得られた潜在嵩高性不織布および嵩高不織布の特性について表１に示す。 Table 1 shows the characteristics of the latent bulky non-woven fabric and the bulky non-woven fabric obtained in the above-mentioned Examples and Comparative Examples.

Figure 2020183587
Figure 2020183587

表１からわかるように、実施例１〜７においては、厚み減少率および湿潤時触感が良好な嵩高不織布が得られており、フェイスマスク用途などに適したものである。これに対して、比較例１では収縮性アクリル繊維を使用していないため、湿潤時のへたりが大きく、触感に劣るものとなった。比較例２では、潜在嵩高性不織布の目付けが高すぎるため、収縮処理後の不織布密度も高くなり、湿潤時触感に劣るものとなった。 As can be seen from Table 1, in Examples 1 to 7, bulky non-woven fabrics having a good thickness reduction rate and a good tactile sensation when wet are obtained, and are suitable for face mask applications and the like. On the other hand, in Comparative Example 1, since the shrinkable acrylic fiber was not used, the settling when wet was large and the tactile sensation was inferior. In Comparative Example 2, since the basis weight of the latent bulky non-woven fabric was too high, the density of the non-woven fabric after the shrinkage treatment was also high, and the texture when wet was inferior.

Claims (11)

沸水収縮率が５〜４５％の収縮性アクリル繊維２０〜６０重量％と非収縮性繊維４０〜８０重量％を含有し、かつ、目付けが１０〜１３５ｇ／ｍ２であることを特徴とする潜在嵩高性不織布。 Potential characterized by containing 20 to 60% by weight of shrinkable acrylic fiber having a boiling water shrinkage rate of 5 to 45% and 40 to 80% by weight of non-shrinkable fiber, and having a basis weight of 10 to 135 g / m 2. Bulky non-woven fabric. 単層であることを特徴とする請求項１に記載の潜在嵩高性不織布。 The latent bulky non-woven fabric according to claim 1, which is a single layer. スパンレース加工構造を有することを特徴とする請求項１または２に記載の潜在嵩高性不織布。 The latent bulky non-woven fabric according to claim 1 or 2, which has a spunlaced structure. 熱融着性繊維を含有しないことを特徴とする請求項１〜３のいずれかに記載の潜在嵩高性不織布。 The latent bulky non-woven fabric according to any one of claims 1 to 3, which is characterized by not containing heat-sealing fibers. 収縮性アクリル繊維の繊度が０．３〜６．０ｄｔｅｘであることを特徴とする請求項１〜４のいずれかに記載の潜在嵩高性不織布。 The latent bulky non-woven fabric according to any one of claims 1 to 4, wherein the shrinkage acrylic fiber has a fineness of 0.3 to 6.0 dtex. 非収縮性繊維がアクリル繊維であることを特徴とする請求項１〜５のいずれかに記載の潜在嵩高性不織布。 The latent bulky non-woven fabric according to any one of claims 1 to 5, wherein the non-shrinkable fiber is an acrylic fiber. 非収縮性繊維の繊度が０．３〜６．０ｄｔｅｘであることを特徴とする請求項１〜６のいずれかに記載の潜在嵩高性不織布。 The latent bulky non-woven fabric according to any one of claims 1 to 6, wherein the fineness of the non-shrinkable fiber is 0.3 to 6.0 dtex. 請求項１〜７のいずれかの不織布を収縮処理することによって得られる嵩高不織布。 A bulky nonwoven fabric obtained by shrinking the nonwoven fabric according to any one of claims 1 to 7. 収縮発現した収縮性アクリル繊維２０〜６０重量％と非収縮性繊維４０〜８０重量％を含む単層の不織布であって、不織布の表面と裏面に一部の非収縮性繊維が浮き出していることを特徴とする嵩高不織布。 A single-layer non-woven fabric containing 20 to 60% by weight of shrinkable acrylic fibers and 40 to 80% by weight of non-shrinkable fibers, in which some non-shrinkable fibers are projected on the front and back surfaces of the non-woven fabric. A bulky non-woven fabric characterized by. 請求項８または９に記載の嵩高不織布を含むフェイスマスク。 A face mask containing the bulky non-woven fabric according to claim 8 or 9. 請求項１０に記載のフェイスマスクに化粧水が充填されていることを特徴とする化粧水充填済みフェイスマスク。 A face mask filled with a lotion, which comprises filling the face mask according to claim 10 with a lotion.
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