JP2017109053A - Nonwoven fabric for cosmetic face mask - Google Patents
Nonwoven fabric for cosmetic face mask Download PDFInfo
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- JP2017109053A JP2017109053A JP2015247899A JP2015247899A JP2017109053A JP 2017109053 A JP2017109053 A JP 2017109053A JP 2015247899 A JP2015247899 A JP 2015247899A JP 2015247899 A JP2015247899 A JP 2015247899A JP 2017109053 A JP2017109053 A JP 2017109053A
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- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 94
- 239000002537 cosmetic Substances 0.000 title claims abstract description 32
- 239000000835 fiber Substances 0.000 claims abstract description 114
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 23
- 239000004698 Polyethylene Substances 0.000 claims description 14
- 229920000573 polyethylene Polymers 0.000 claims description 14
- 229920000297 Rayon Polymers 0.000 claims description 13
- -1 polyethylene Polymers 0.000 claims description 12
- 239000002964 rayon Substances 0.000 claims description 12
- 229920000728 polyester Polymers 0.000 claims description 10
- 239000004743 Polypropylene Substances 0.000 claims description 9
- 229920001155 polypropylene Polymers 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 230000003796 beauty Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 abstract description 49
- 230000014759 maintenance of location Effects 0.000 abstract description 19
- 239000003795 chemical substances by application Substances 0.000 abstract 1
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- 230000003247 decreasing effect Effects 0.000 description 3
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- 239000004753 textile Substances 0.000 description 2
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- 239000004677 Nylon Substances 0.000 description 1
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- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
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- 239000013065 commercial product Substances 0.000 description 1
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Abstract
Description
本発明は、化粧液や薬剤の保液性と、肌への移行性と肌上での保液性に優れた美容フェイスマスク用不織布に関する。 The present invention relates to a non-woven fabric for a cosmetic face mask that is excellent in liquid retention properties of cosmetic liquids and drugs, transferability to the skin, and liquid retention properties on the skin.
従来から、広く普及している美容フェイスマスク用不織布は、通常、レーヨンや綿などの繊維を主原料としたスパンレース不織布や、キュプラ不織布などの基材を用いており、これらの不織布を顔型に打ち抜いたものを使用している。
前記不織布を用いた美容フェイスマスクは、昨今、国内外において普及の一途をたどっている。
顔面に美容液等を直接に塗る場合には、液垂れが生じないようにするために、塗布量の制限が必要となるが、美容フェイスマスク用不織布を使用した場合には、不織布が多くの美容液等を保持することで、長時間にわたり、美容液を肌に補充しつつ顔面になじませていくことができるので、高い美容効果等を得ることができる点を挙げることが使用量が増加しているものと考えられる。
Conventionally, non-woven fabrics for beauty face masks that have been widely used usually use base materials such as spunlace nonwoven fabrics and cupra nonwoven fabrics mainly made of fibers such as rayon and cotton. The one punched out is used.
Beauty face masks using the nonwoven fabric have been increasingly popular in Japan and overseas.
When applying cosmetic liquid directly on the face, it is necessary to limit the amount of application to prevent dripping. However, when using a cosmetic face mask nonwoven fabric, many nonwoven fabrics are used. By holding essence, etc., it can be applied to the face while replenishing essence to the skin for a long time, so the amount used is increased to mention that high beauty effects etc. can be obtained It is thought that.
一方、吸液性が大きなレーヨンや綿を使用した美容フェイスマスクでは、不織布自体が化粧液を過剰に保持し、その結果、肌への美容液の移行、すなわち液離れが不充分なものとなり、十分な美容効果を得にくいという問題点があった。 On the other hand, in the beauty face mask using rayon and cotton having a large liquid absorbency, the nonwoven fabric itself retains the cosmetic liquid excessively, resulting in insufficient transfer of the cosmetic liquid to the skin, that is, liquid separation. There was a problem that it was difficult to obtain a sufficient beauty effect.
本発明は、上記の従来技術の問題点に鑑み、化粧液等の肌への移行性にも優れ、かつ、美容フェイスマスクとして必要な保液性や強度を備えた美容フェイスマスクの基材として好適な不織布を提供することにある。 In view of the above-mentioned problems of the prior art, the present invention is a cosmetic face mask base material that is excellent in transferability to the skin of a cosmetic liquid and the like, and has liquid retention and strength necessary as a cosmetic face mask. It is in providing a suitable nonwoven fabric.
本発明者らは、上記課題を解決するため、鋭意研究を重ねた結果、以下の発明要件を同時に取り入れることによって美容効果の高い美容フェイスマスク用不織布の提供ができることを見出した。
すなわち、親水性繊維が２５〜４０質量％及び疎水性繊維が６０〜７５質量％、各々の繊維が４ｄｔｅｘ以下の繊度の短繊維で構成される不織布であって、その不織布の目付質量が２０〜６０ｇ／ｍ2、かつ、空隙率が８５％以上の範囲にある美容フェイスマスク用不織布である。
また、親水性繊維が、レーヨン短繊維であり、疎水性繊維がさや部の融点１３０℃以下のポリエチレン、芯部がポリプロピレンまたはポリエステルからなる芯さや短繊維である前記の美容フェイスマスク用不織布である。
As a result of intensive studies to solve the above problems, the present inventors have found that a non-woven fabric for a cosmetic face mask having a high cosmetic effect can be provided by simultaneously incorporating the following invention requirements.
That is, 25-40 mass% of hydrophilic fibers and 60-75 mass% of hydrophobic fibers, each fiber is a nonwoven fabric composed of short fibers having a fineness of 4 dtex or less, and the basis weight of the nonwoven fabric is 20- It is a nonwoven fabric for cosmetic face masks having a range of 60 g / m 2 and a porosity of 85% or more.
The cosmetic face mask non-woven fabric as described above, wherein the hydrophilic fiber is a rayon short fiber, the hydrophobic fiber is a polyethylene having a melting point of 130 ° C. or lower in the sheath, and the core is a core or short fiber made of polypropylene or polyester. .
本発明では、（１）親水性繊維と、疎水性繊維を混合して使用している。これによって、不織布に含浸した美容液の“液離れ”を改善し、装着時に美容液の肌へ移行を良好にしている。
さらに、（２）不織布の目付質量（以後、単に目付ともいう）と空隙率を適切に設定する。これによって、不織布の内部繊維間に適度な空隙を形成することができるので、親水性繊維の使用割合が少なくても高い保液性を得ることができる。
また、（３）使用する繊維の繊度及び目付質量を適切に設定することによって、高い吸液性と適度の強度及び柔軟性を得て、顔面の凹凸にしなやかに追従させるという美容フェイスマスクに必要な要件をすべて満たした特性が優れた不織布を提供できることを見出し、これらの知見に基づき、本発明を完成するに至った。
In the present invention, (1) a hydrophilic fiber and a hydrophobic fiber are mixed and used. This improves the “liquid separation” of the cosmetic liquid impregnated in the nonwoven fabric, and makes the transition of the cosmetic liquid to the skin better when worn.
Furthermore, (2) the basis weight (hereinafter also simply referred to as basis weight) and porosity of the nonwoven fabric are appropriately set. As a result, an appropriate gap can be formed between the internal fibers of the nonwoven fabric, so that high liquid retention can be obtained even if the use ratio of the hydrophilic fibers is small.
(3) Necessary for cosmetic face masks that can obtain high liquid absorbency, moderate strength and flexibility by appropriately setting the fineness and mass per unit area of the fibers used, and flexibly follow the unevenness of the face. The present inventors have found that it is possible to provide a non-woven fabric having excellent characteristics that satisfy all of the above requirements, and based on these findings, the present invention has been completed.
すなわち、第１の実施態様によれば、親水性繊維が２５〜４０質量％、疎水性繊維が６０〜７５質量％、各々の繊維が４ｄｔｅｘ以下の繊度の短繊維で構成した不織布であって、その不織布の目付質量が２０〜６０ｇ／ｍ2、空隙率が８５％以上の範囲にある美容フェイスマスク用不織布を提供する。 That is, according to the first embodiment, the nonwoven fabric is composed of short fibers having a fineness of 25 to 40% by mass, hydrophobic fibers of 60 to 75% by mass, and each fiber having a fineness of 4 dtex or less. Provided is a non-woven fabric for a cosmetic face mask in which the non-woven fabric has a basis weight of 20 to 60 g / m 2 and a porosity of 85% or more.
また、第２の実施態様によれば、親水性繊維がレーヨン短繊維またはコットン短繊維、疎水性繊維がさや部の融点１３０℃以下のポリエチレン、芯部がポリプロピレンまたはポリエステルからなる芯さや短繊維である美容フェイスマスク用不織布が提供される。 Further, according to the second embodiment, the hydrophilic fiber is a short rayon fiber or cotton short fiber, the hydrophobic fiber is a core having a melting point of 130 ° C. or less, and the core is a core or short fiber made of polypropylene or polyester. A non-woven fabric for a cosmetic face mask is provided.
本発明によれば、美容フェイスマスクとして望ましい化粧液の肌への移行性に優れ、且つ、保液性や強度を持ち、且つ、顔面形状への追従性に優れた美容フェイスマスク用不織布を提供することができる。 According to the present invention, there is provided a non-woven fabric for a cosmetic face mask that is excellent in transferability of the cosmetic liquid, which is desirable as a cosmetic face mask, has liquid retention and strength, and has excellent followability to the face shape. can do.
まず、不織布を構成する主要な要件である繊維の種類と配合、繊維の繊度、目付質量、空隙率等について以下に説明する。 First, fiber types and blends, fiber fineness, mass per unit area, porosity, and the like, which are main requirements for constituting the nonwoven fabric, will be described below.
[不織布の繊維構成]
まず、本発明の不織布の繊維について説明する。
（１）親水性繊維
本発明の不織布に用いる親水性水繊維としては、綿、セルロース系繊維、レーヨン、キュプラ等の溶剤紡糸セルロース繊維が挙げられる。肌への密着性の点から、綿、再生セルロース系繊維が特に好ましい。
[Fiber composition of non-woven fabric]
First, the fibers of the nonwoven fabric of the present invention will be described.
(1) Hydrophilic fiber Examples of the hydrophilic water fiber used in the nonwoven fabric of the present invention include solvent-spun cellulose fibers such as cotton, cellulosic fibers, rayon and cupra. From the viewpoint of adhesion to the skin, cotton and regenerated cellulose fibers are particularly preferable.
（２）疎水性繊維
疎水性繊維としては、ポリエチレンやポリプロピレン等のポリオレフィン系繊維、ポリエチレンテレフタレート等のポリエステル系繊維、ナイロン等のポリアミド系繊維、ポリアクリルニトリル系繊維、ポリビニルアルコール系繊維、ポリウレタン繊維等の合成繊維が挙げられる。
これらのうち、単一の不織布を変形又は複数の不織布を圧着させることで立体的な形状に加工させることが容易な加熱によって溶融し、相互に接着性を発現する繊維である熱融着性繊維を用いることが好ましい。
特に、融点の異なる複数の繊維材料を芯鞘型に配した複合短繊維（以下芯鞘短繊維ともいう）を用いることが好ましい。
図１は、芯鞘繊維を説明する斜視図である。
図１に示す鞘部ａに低融点樹脂、芯部ｂに高融点樹脂を配したものである。この芯鞘短繊維により構成されるシート（以下、ウエブという）に対して、鞘部の繊維材料の融点以上の温度に設定された熱風エアを垂直に貫通させ（以下、エアスルー方式ともいう）、繊維の鞘同士が接触する部分を熱融着して、繊維の脱落・解離が生じない不織布を得ることができる。
(2) Hydrophobic fibers Examples of hydrophobic fibers include polyolefin fibers such as polyethylene and polypropylene, polyester fibers such as polyethylene terephthalate, polyamide fibers such as nylon, polyacrylonitrile fibers, polyvinyl alcohol fibers, and polyurethane fibers. Of synthetic fibers.
Among these, a heat-fusible fiber that is a fiber that melts by heating and can easily be processed into a three-dimensional shape by deforming a single non-woven fabric or crimping a plurality of non-woven fabrics, and exhibiting mutual adhesion Is preferably used.
In particular, it is preferable to use composite short fibers (hereinafter also referred to as core-sheath short fibers) in which a plurality of fiber materials having different melting points are arranged in a core-sheath type.
FIG. 1 is a perspective view illustrating a core-sheath fiber.
The sheath part a shown in FIG. 1 is provided with a low melting point resin and the core part b with a high melting point resin. For the sheet composed of the core-sheath short fibers (hereinafter referred to as the web), the hot air set at a temperature equal to or higher than the melting point of the fiber material of the sheath is vertically penetrated (hereinafter also referred to as an air-through method), A non-woven fabric in which the fibers do not fall off or dissociate can be obtained by heat-sealing the portions where the fiber sheaths contact each other.
前記芯鞘短繊維としては、芯：ポリプロピレン（PP）／鞘：ポリエチレン（PE）の芯鞘短繊維（以後PP/PEとも記す）、又は、芯：ポリエステル（PET）／鞘：ポリエチレン（PE）短繊維（以後PET/PEとも記す）などが好ましく用いられる。
いずれの繊維も、鞘部の融点が１００〜１３０℃の範囲のものである。
また、繊維の繊度は４ｄｔｅｘ以下のものを使用する。これより繊度が大きいとウエブが硬くなり、柔軟性が低下し、顔面形状への追従性が低下するので好ましくない。
As the core-sheath short fiber, core: polypropylene (PP) / sheath: polyethylene (PE) core-sheath short fiber (hereinafter also referred to as PP / PE), or core: polyester (PET) / sheath: polyethylene (PE) Short fibers (hereinafter also referred to as PET / PE) are preferably used.
Any fiber has a sheath having a melting point in the range of 100 to 130 ° C.
Moreover, the fineness of a fiber uses 4 dtex or less. If the fineness is larger than this, the web becomes hard, the flexibility is lowered, and the followability to the face shape is lowered.
（３）混合割合
本発明では、上記親水性繊維と疎水性繊維を混合して使用する。その混合割合は、親水性繊維が２５〜４０質量％、疎水性繊維が６０〜７５質量％である。親水性繊維の割合が２５質量％より少ないと、保液性（率）が低下し、また、４０質量％より多いと化粧液の移行性が低下し、好ましくない。
(3) Mixing ratio In this invention, the said hydrophilic fiber and hydrophobic fiber are mixed and used. The mixing ratio is 25 to 40% by mass for hydrophilic fibers and 60 to 75% by mass for hydrophobic fibers. When the ratio of the hydrophilic fiber is less than 25% by mass, the liquid retaining property (rate) is lowered, and when it is more than 40% by mass, the transferability of the cosmetic liquid is lowered, which is not preferable.
[不織布の構成]
次に、前記繊維を使用して作製される不織布の態様について、説明する。
（１）不織布の目付質量
不織布の目付質量は、２０〜６０g/ｍ2の範囲に設定する。目付質量が２０g/m2より小さくなると、保液率および強度が低下し、好ましくない。また、６０g/m2より大きいと、柔軟性が低下し、顔面形状への追従性が低下するため好ましくない。
（２）不織布の空隙率
不織布の空隙率は、不織布の目付質量、厚み及び繊維の真比重により以下の式にて算出される。
充填率（％）＝目付（ｇ／ｍ2）／厚み（ｍｍ）／真比重／１０００×１００
空隙率（％）＝１００−充填率
ここで、空隙率とは、不織布の内部における繊維間の空隙の大きさである。この空隙に液が貯留され、保液性が保たれる。
従来のものは、親水性繊維自体の親水性により保液量を確保するものであるが、本発明では、親水性繊維と疎水性繊維を併用することにより不織布の空隙を増やし、その空隙に液を貯留することが特徴である。
本発明の不織布の空隙率が８５％以上が好ましい。
[Composition of non-woven fabric]
Next, the aspect of the nonwoven fabric produced using the said fiber is demonstrated.
(1) Mass per unit area of non-woven fabric The mass per unit area of non-woven fabric is set in the range of 20-60 g / m 2 . If the weight per unit area is less than 20 g / m 2 , the liquid retention and strength decrease, which is not preferable. On the other hand, when it is larger than 60 g / m 2 , the flexibility is lowered and the followability to the face shape is lowered, which is not preferable.
(2) Porosity of nonwoven fabric The porosity of a nonwoven fabric is calculated with the following formula | equation with the fabric weight, thickness of a nonwoven fabric, and the true specific gravity of a fiber.
Filling rate (%) = basis weight (g / m 2 ) / thickness (mm) / true specific gravity / 1000 × 100
Porosity (%) = 100−Filling ratio Here, the porosity is the size of the gap between fibers inside the nonwoven fabric. The liquid is stored in the gap, and the liquid retaining property is maintained.
Conventionally, the amount of liquid retention is ensured by the hydrophilicity of the hydrophilic fiber itself, but in the present invention, by using the hydrophilic fiber and the hydrophobic fiber in combination, the voids of the nonwoven fabric are increased, and the liquid is filled in the voids. It is characterized by storing.
The porosity of the nonwoven fabric of the present invention is preferably 85% or more.
[不織布の製造方法]
本発明の高い空隙率の不織布を得るために、エアスルー方式によるサーマルボンド不織布を採用することが望ましい。ここで、当該サーマルボンド不織布の製造方法について図２を参照して説明する。
カード機１において、短繊維原綿は一定幅と目付質量のシート状２に仕立てられ（これをウエブという）、前方に連続的に移送される。該ウエブは、案内ロール３を経て、コンベア装置４，５により、熱風送風炉６，７に導入される。
炉内に送られる熱風は、ウエブを垂直に貫通し、その熱によりウエブ内の繊維の交点が融着結合して、適切な強度を有する不織布８を形成する。次いで、ロール状に巻き取られて不織布製品９となる。ここで不織布の目付質量は、カード機の紡出量により、また、厚みは、ウエブの繊維構成、目付質量、熱風条件などを適宜選択することにより所定の値に設定される。
[Nonwoven Fabric Manufacturing Method]
In order to obtain the nonwoven fabric with high porosity of the present invention, it is desirable to employ a thermal bond nonwoven fabric by an air-through method. Here, the manufacturing method of the said thermal bond nonwoven fabric is demonstrated with reference to FIG.
In the
The hot air sent into the furnace vertically penetrates the web, and the intersection of the fibers in the web is fusion-bonded by the heat to form the
なお、本発明におけるサーマルボンド不織布の作製において、カード機から紡出されるウエブ状繊維がクロスして積層されるクロスウェブと、パラレルに積層されるパラレルウエブがある。本発明の不織布は、繊維構成と目付質量、厚みが同一であれば、クロスウエブ又はパラレルウエブのいずれでも選択ができる。以下の実施例では、共通にパラレルウエブ方式とし、エアスルー工程の熱風温度を１６０℃として、サーマルボンド不織布を作製した。 In the production of the thermal bond nonwoven fabric in the present invention, there are a cross web in which web-like fibers spun from a card machine are laminated and laminated, and a parallel web laminated in parallel. The nonwoven fabric of the present invention can be selected from either a cross web or a parallel web as long as the fiber configuration, the basis weight, and the thickness are the same. In the following examples, a thermal bonding nonwoven fabric was manufactured by using a parallel web system in common and setting the hot air temperature in the air-through process to 160 ° C.
以下に、本発明の実施例、比較例を示し、本発明を説明する。
まず、評価試験に用いた繊維とその評価方法について説明する。
[親水性繊維]
親水性繊維は、オーミケンシ社製の繊度１．１、１．７、３．３ｄｔｅｘ，繊維長４０ｍｍのビスコースレーヨンを用いた。
[疎水性繊維]
疎水性繊維は、ＥＳファイバービジョン社製のＰＰ／ＰＥ芯鞘短繊維を用い、その繊度は１．１、２．２、および６．６ｄｔｅｘ、繊維長は５１ｍｍのものを用いた。
また、ＰＥＴ/ＰＥ芯鞘短繊維として、ＥＳファイバービジョン社製の繊度１．７ｄｔｅｘ、繊維長５１ｍｍのものを用いた。
Examples of the present invention and comparative examples are shown below to explain the present invention.
First, the fiber used for the evaluation test and its evaluation method will be described.
[Hydrophilic fiber]
As the hydrophilic fiber, viscose rayon having a fineness of 1.1, 1.7, 3.3 dtex, and a fiber length of 40 mm manufactured by Omikenshi was used.
[Hydrophobic fiber]
As the hydrophobic fibers, PP / PE core-sheath short fibers manufactured by ES Fiber Vision were used, the finenesses were 1.1, 2.2, and 6.6 dtex, and the fiber length was 51 mm.
Further, as the PET / PE core-sheath short fibers, those having a fineness of 1.7 dtex and a fiber length of 51 mm manufactured by ES Fiber Vision were used.
[試験方法及び評価基準]
実施例において適用する試験方法及び評価基準を以下に説明する。なお、評価基準は、レーヨン１００％の市販品を参考とし、かつ、実用的な観点から美容フェイスマスクとして望ましい値を設定した。
（１）液の移行性
対象となる不織布の液の移行性を以下の手順にて計測する。なお、試験液としては、美容液の主成分である水を用いた。
手順−１
５ｃｍ角の不織布試料のを用意し、これを水中に１５秒間浸したのち、平板上に静置する。
手順−２
吸水体として、親水性レーヨン繊維を多く含むレーヨン／ポリオレフィン／ポリエステル（質量比６０／１５／２５）のニードルパンチ不織布とポリエチレン製ネットの複合品（１３５ｇ／ｍ2）を５ｃｍ角に切り出し、その質量Ｗ１を計測したのち、前記ネット側を試験対象の不織布試料に重ね被せ、さらに、その上に５ｃｍ角、厚さ０．５ｍｍの平板状鋼片を“おもし”として置き、そのまま１０秒間静置し、その後、直ちにその質量Ｗ２を計測する。
手順−３
吸水体の質量変化（Ｗ２−Ｗ１）を、試料不織布からの水の移行量とし、移行性の指標とする。
移行量＝Ｗ２−Ｗ１
評価基準：移行量１．０g以上を合格とした。
[Test methods and evaluation criteria]
Test methods and evaluation criteria applied in the examples will be described below. The evaluation standard was set to a value desirable for a cosmetic face mask from a practical viewpoint with reference to a commercial product of 100% rayon.
(1) Liquid transferability The liquid transferability of the target nonwoven fabric is measured by the following procedure. In addition, water which is the main component of the cosmetic liquid was used as the test liquid.
Procedure-1
A 5 cm square nonwoven fabric sample is prepared, immersed in water for 15 seconds, and then allowed to stand on a flat plate.
Procedure-2
As a water absorbent, a composite product (135 g / m 2 ) of a rayon / polyolefin / polyester (mass ratio 60/15/25) needle punch nonwoven fabric and polyethylene net containing a large amount of hydrophilic rayon fibers is cut into 5 cm square and its mass After measuring W1, the net side is overlaid on the nonwoven fabric sample to be tested, and a flat steel piece of 5 cm square and 0.5 mm thickness is placed on it as a “weight” and left as it is for 10 seconds. Thereafter, the mass W2 is immediately measured.
Step-3
The mass change (W2-W1) of the water-absorbing body is defined as the amount of water transferred from the sample nonwoven fabric and used as an index of transferability.
Transfer amount = W2-W1
Evaluation criteria: A transfer amount of 1.0 g or more was regarded as acceptable.
（２）目付質量
不織布を１０ｃｍ角の大きさに切り取り、その質量を計測してｎ＝５の平均値を目付質量とした。
（３）厚みの評価
厚み計（接触面積１ｃｍ2、荷重１００ｇ/ｃｍ2）を用いて計測してｎ＝５の平均値を厚みとした。
以上の厚みの測定値と目付質量から、前述のように空隙率を算出する。
また、空隙率は、上記目付質量、厚みの計測値及び繊維の真比重を用いて、
先に説明したように充填率（％）＝目付（ｇ／ｍ2）／厚み（ｍｍ）／真比重／１０００×１００ を求めて下記の計算式により算出した。
空隙率（％）＝１００−充填率
空隙率の評価基準：８５％以上を合格とする。
（４）引張強度の評価
ＪＩＳ Ｌ１０９６−１９７９織物試験法８．１２．１のＡ法 ストリップ法に準拠して以下のように測定した。
５ｃｍ×２０ｃｍの試験片を対象不織布（タテ方向）より切り出し、チャック間距離１０ｃｍ、引張速度２００ｍｍ/分にて引張破断強度を測定する。
強度の評価基準：２０Ｎ以上を合格とした。
（６）形状追従性の評価
ＪＩＳ Ｌ１０９６−１９７９一般織物試験法 剛軟度Ａ法（カンチレバー法）に準拠し、試料寸法２０ｍｍ（幅）×１５０ｍｍ（長さ）にて剛軟度を計測する。 この測定は試料のしなやかさを表現するものであり、形状追従性の指標とする。
形状追従性の評価基準：剛軟度９０ｍｍ以下を合格とした。
（７）保液率の評価
美容液の主成分である水を水槽内に満たし、不織布を十分浸漬したあと、槽内より取り出し、浸漬前後の質量変化を計測して、以下の式によって保液率を求めた。
保液率（％）＝（ピックアップした浸漬後の不織布質量―浸漬前の不織布質量）／浸漬前の不織布質量×１００（％）
保液性の評価基準：保液率５００％以上を合格とした。
(2) Mass per unit area A nonwoven fabric was cut into a size of 10 cm square, the mass was measured, and the average value of n = 5 was defined as the mass per unit area.
(3) Evaluation Thickness gauge thickness (
From the above measured thickness value and basis weight, the porosity is calculated as described above.
Moreover, the porosity is determined by using the above-mentioned weight per unit area, the measured thickness value, and the true specific gravity of the fiber.
As described above, the filling rate (%) = weight per unit area (g / m 2 ) / thickness (mm) / true specific gravity / 1000 × 100 was calculated and calculated according to the following formula.
Porosity (%) = 100−Filling rate Evaluation criteria for porosity: 85% or more is acceptable.
(4) Evaluation of tensile strength Measured as follows according to JIS L1096-1979 Textile Test Method 8.12.1, Method A Strip Method.
A test piece of 5 cm × 20 cm is cut out from the target nonwoven fabric (vertical direction), and the tensile strength at break is measured at a distance between chucks of 10 cm and a tensile speed of 200 mm / min.
Evaluation standard of strength: 20N or more was regarded as acceptable.
(6) Evaluation of Shape Followability According to JIS L1096-1979 General Textile Test Method, the bending resistance is measured at a sample size of 20 mm (width) × 150 mm (length) in accordance with the bending resistance A method (cantilever method). This measurement expresses the suppleness of the sample and is used as an index of shape following ability.
Evaluation criteria for shape followability: Bending softness of 90 mm or less was accepted.
(7) Evaluation of liquid retention rate After filling the water tank, which is the main component of the beauty liquid, sufficiently immersing the non-woven fabric, take out from the tank, measure the mass change before and after immersion, and retain the liquid according to the following formula: The rate was determined.
Liquid retention ratio (%) = (weight of nonwoven fabric after dipping picked up−weight of nonwoven fabric before dipping) / weight of nonwoven fabric before dipping × 100 (%)
Evaluation criteria for liquid retention: A liquid retention rate of 500% or more was regarded as acceptable.
実施例１
親水性繊維として、繊度が１．７ｄｔｅｘのレーヨン短繊維を３０質量％、疎水性繊維として繊度が２．２ｄｔｅｘのＰＰ/ＰＥ芯鞘短繊維を７０質量％の割合で混合綿を調製し、エアスルー方式（エア温度１６０℃）にて目付質量２０g/ｃｍ2のサーマルボンド不織布を作製した。その結果、空隙率８８．１％の不織布を得た。この不織布について、液（水）の移行率、保液率、引張強度、そして、顔面形状への追従性の指標とした剛軟度を測定し、表１に示すその結果は、前述したすべての評価基準を満たすものであった。
Example 1
30% by mass of rayon short fibers with a fineness of 1.7 dtex as hydrophilic fibers and 70% by mass of PP / PE core-sheath short fibers with a fineness of 2.2 dtex as hydrophobic fibers are prepared. A thermal bond nonwoven fabric with a mass per unit area of 20 g / cm 2 was produced by the method (air temperature 160 ° C.). As a result, a nonwoven fabric having a porosity of 88.1% was obtained. About this nonwoven fabric, the transition rate of liquid (water), the liquid retention rate, the tensile strength, and the bending resistance as an index of the followability to the face shape were measured, and the results shown in Table 1 are all the results described above. The evaluation criteria were met.
実施例２
親水性繊維を４０質量％、疎水性繊維を６０質量％とした以外は、実施例１と同様の条件にて、不織布を作製し評価した。その結果を表１に示す。
Example 2
A nonwoven fabric was prepared and evaluated under the same conditions as in Example 1 except that the hydrophilic fiber was 40% by mass and the hydrophobic fiber was 60% by mass. The results are shown in Table 1.
実施例３
実施例１における不織布の目付質量を４０g/ｍ２とした以外は、実施例１と同様の条件にて不織布を作製して評価した。その結果を表１に示す。
Example 3
A nonwoven fabric was produced and evaluated under the same conditions as in Example 1 except that the basis weight of the nonwoven fabric in Example 1 was 40 g / m2. The results are shown in Table 1.
実施例４
実施例１における不織布の目付質量を６０g/ｍ2とした以外は、実施例１と同様の条件にて不織布を作製し評価した。その結果を表１に示す。
Example 4
A nonwoven fabric was produced and evaluated under the same conditions as in Example 1 except that the basis weight of the nonwoven fabric in Example 1 was 60 g / m 2 . The results are shown in Table 1.
実施例５
親水性繊維の繊度が１．１ｄｔｅｘ、疎水性繊維の繊度が３．３ｄｔｅｘとし、実施例１と同様の条件にて不織布を作製し評価した。その結果を表１に示す。
Example 5
A nonwoven fabric was prepared and evaluated under the same conditions as in Example 1 with the fineness of the hydrophilic fiber being 1.1 dtex and the fineness of the hydrophobic fiber being 3.3 dtex. The results are shown in Table 1.
実施例６
親水性繊維の繊度が３．３ｄｔｅｘ、疎水性繊維の繊度が１．１ｄｔｅｘとし、実施例１とした以外は、同様の条件にて不織布を作製し評価した。その結果を表１に示す。
Example 6
A nonwoven fabric was prepared and evaluated under the same conditions as Example 1 except that the fineness of the hydrophilic fiber was 3.3 dtex and the fineness of the hydrophobic fiber was 1.1 dtex. The results are shown in Table 1.
実施例７
疎水性繊維を、繊度２．２のＰＥＴ/ＰＥ芯鞘短繊維に代えた以外は、実施例１と同様にして不織布を作製し評価した。その結果を表１に示す。
また、実施例２〜７の評価結果は全ての評価基準を満たすものであった。
Example 7
A nonwoven fabric was prepared and evaluated in the same manner as in Example 1 except that the hydrophobic fiber was replaced with a PET / PE core-sheath short fiber having a fineness of 2.2. The results are shown in Table 1.
Moreover, the evaluation result of Examples 2-7 satisfy | filled all the evaluation criteria.
比較例１
親水性繊維を２０質量％、疎水性繊維を８０質量％に変更した以外は実施例１同様にして不織布を作製し、その結果を表２に示す。保液性の低下が見られた。これは、親水性繊維の不織布に占める成分割合が小さ過ぎ、吸水量の低下を招いたものと考えられる。
Comparative Example 1
A nonwoven fabric was prepared in the same manner as in Example 1 except that the hydrophilic fiber was changed to 20% by mass and the hydrophobic fiber was changed to 80% by mass. The results are shown in Table 2. A decrease in liquid retention was observed. This is considered to be because the component ratio of the hydrophilic fiber to the nonwoven fabric is too small, causing a decrease in water absorption.
比較例２
親水性繊維を６０質量％、疎水性繊維を４０質量％とした以外は、実施例１と同様にして不織布を作製し、その結果を表２に示す。液の移行性及び強度が低下した。これは、吸水繊維の割合が多くなり過ぎたためと考えられる。
Comparative Example 2
A nonwoven fabric was prepared in the same manner as in Example 1 except that the hydrophilic fiber was changed to 60% by mass and the hydrophobic fiber was changed to 40% by mass. The results are shown in Table 2. The liquid transferability and strength decreased. This is presumably because the proportion of water-absorbing fibers has increased too much.
比較例３
不織布の目付質量を１５g/ｍ2とした以外は、実施例１と同様にして、不織布を作製し、その結果を表２に示す。保液率と引張強度が低下し、評価基準を下回った。これは、目付質量が過小のためと考えられる。
Comparative Example 3
A nonwoven fabric was produced in the same manner as in Example 1 except that the basis weight of the nonwoven fabric was 15 g / m 2, and the results are shown in Table 2. The liquid retention rate and tensile strength decreased and were below the evaluation criteria. This is thought to be because the basis weight is too small.
比較例４
不織布の目付質量を７０g/ｍ2とした以外は、実施例１と同様にして、不織布を作製し評価し、その結果を表２に示す。形状追従性が低下した。これは、目付質量の増加により剛難度が高くなったためと考えられる。
Comparative Example 4
A nonwoven fabric was produced and evaluated in the same manner as in Example 1 except that the basis weight of the nonwoven fabric was 70 g / m 2. The results are shown in Table 2. Shape followability decreased. This is thought to be due to the increase in stiffness due to the increase in mass per unit area.
比較例５
疎水性繊維の繊度を６．６ｄｔｅｘとした以外は、実施例１と同様にして、不織布を作製し評価しし、その結果を表２に示す。剛難度が上昇しており、これは繊度が大きいため、不織布が硬くなり、形状追従性が損なわれたものと考えられる。
Comparative Example 5
A nonwoven fabric was prepared and evaluated in the same manner as in Example 1 except that the fineness of the hydrophobic fiber was 6.6 dtex, and the results are shown in Table 2. It is considered that the degree of rigidity has increased, and this is because the fineness is large, the nonwoven fabric becomes hard, and the shape followability is impaired.
参考例
親水性繊維であるレーヨン短繊維のみを用いて、スパンレース法によって、目付４０g/ｍ２の不織布を作製し評価した。その結果を表２に示す。液の移行性及び保液率が、評価基準を下回っていた。液の移行性が低いのは、親水性繊維であるレーヨンのみで占められた結果、液離れが悪くなったためと考えられる。また、保液率が低いのは、空隙率が低いことが原因と考えられる。
Reference Example A nonwoven fabric having a basis weight of 40 g /
化粧液の肌への移行性にも優れ、且つ、美容フェイスマスクとして必要な保液性や強度を持つ美容フェイスマスク用の不織布を提供することができる。 It is possible to provide a non-woven fabric for a cosmetic face mask that is excellent in the transferability of the cosmetic liquid to the skin and that has the liquid retention and strength required as a cosmetic face mask.
ａ・・・鞘部、ｂ・・・芯部、１・・・カード機、２・・・シート、３・・・案内ロール、４，５・・・コンベア装置、６，７・・・熱風送風炉、８・・・ 不織布、９・・・不織布製品 a ... sheath part, b ... core part, 1 ... card machine, 2 ... sheet, 3 ... guide roll, 4, 5 ... conveyor device, 6, 7 ... hot air Blast furnace, 8 ... Nonwoven fabric, 9 ... Nonwoven fabric product
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