JP6734072B2 - Cellulose fiber non-woven fabric for face mask - Google Patents
Cellulose fiber non-woven fabric for face mask Download PDFInfo
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Description
肌との密着性が高く、薬液を均一に肌へ移行することに優れ、浸透感を実感することができるフェイスマスク用セルロース繊維不織布に関する。 The present invention relates to a cellulose fiber non-woven fabric for a face mask, which has high adhesion to the skin, is excellent in uniformly transferring a liquid medicine to the skin, and can actually feel a permeation feeling.
従来、セルロース繊維不織布は美容向けのフェイスマスクとして広く使用されている。例えば、銅アンモニアレーヨン原液を流下緊張法によりウエブ化しウエブ化時に繊維が自己接着し、その後、高圧水流処理で３次元交絡を行って不織布化した再生セルロース連続長繊維不織布は乾燥時の白色係数や湿潤時の透明性が高くフェイスマスク装着時における抵抗感が少ない再生セルロース繊維不織布として開発されている（例えば、下記特許文献１参照）。また、低圧水流にて波模様加工を施したセルロース繊維不織布も開発されており拭き取り用途として展開されている（例えば、下記特許文献２参照）。 Conventionally, a cellulose fiber nonwoven fabric is widely used as a face mask for beauty. For example, a regenerated cellulose continuous long-fiber non-woven fabric obtained by web-forming a copper ammonia rayon stock solution by a falling tension method to self-adhere fibers during web formation, and then performing three-dimensional entanglement by high-pressure water flow treatment to form a non-woven fabric has It has been developed as a regenerated cellulose fiber non-woven fabric that has high transparency when wet and has little resistance when a face mask is attached (see, for example, Patent Document 1 below). In addition, a cellulose fiber non-woven fabric that has been subjected to wave pattern processing with a low-pressure water stream has also been developed and is being developed for wiping applications (see, for example, Patent Document 2 below).
しかしながら、近年需要が拡大してきた美容向けのフェイスマスク用専用の不織布の開発は十分でなく、以下のような問題点があった。
（１）肌への密着性が不十分であること；
（２）肌への薬液移行性において均一性が不十分であること；
（３）薬液が肌に浸透する感覚を認識できないこと。
However, the development of a non-woven fabric for a face mask for beauty treatment, which has been in increasing demand in recent years, is not sufficient, and there are the following problems.
(1) Adhesion to the skin is insufficient;
(2) Insufficient uniformity of drug solution transfer to the skin;
(3) Failure to recognize the sensation that the liquid medicine penetrates the skin.
本発明の課題は、上記問題点を解決し、肌との密着性が高く、薬液を均一に肌へ移行することに優れ、浸透感を実感することができるフェイスマスク用不織布を提供することである。 An object of the present invention is to provide a non-woven fabric for a face mask which solves the above problems, has high adhesion to the skin, is excellent in uniformly transferring a chemical solution to the skin, and can realize a feeling of penetration. is there.
本発明者等は上記課題を解決するために鋭意研究し実験を重ねた結果、フェイスマスク用不織布を製造する工程において、乾燥直前に純水高圧水流交絡を施すことで、波長と振幅の比（波長／振幅）が１．５ｍｍ／ｍｍ以上１４．０ｍｍ／ｍｍ以下であるＳｉｎカーブ模様を有し、乾燥状態における地合指数が２４０以下、湿潤状態における透明度が６０％以上のフェイスマスク用不織布が得られ、この不織布が上記課題を解決することを見出し、本発明を完成させるに至った。即ち、本発明は、以下の構成を有している。 As a result of intensive studies and experiments conducted by the present inventors to solve the above-mentioned problems, in the process of manufacturing a face mask nonwoven fabric, by applying pure water high pressure water entanglement immediately before drying, the ratio of wavelength to amplitude ( A non-woven fabric for face mask having a Sin curve pattern having a wavelength/amplitude of 1.5 mm/mm or more and 14.0 mm/mm or less, a formation index of 240 or less in a dry state, and a transparency of 60% or more in a wet state. It was found that this non-woven fabric solves the above problems, and has completed the present invention. That is, the present invention has the following configurations.
［１］以下の特徴：
（１）Ｓｉｎカーブ模様を有しており、波長と振幅の比（波長／振幅）が１．５ｍｍ／ｍｍ以上１４．０ｍｍ／ｍｍ以下である；
（２）乾燥状態における地合指数が５０以上２４０以下の範囲である；及び
（３）湿潤状態における透明度が６０％以上である；
を有する、フェイスマスク用セルロース繊維不織布。
［２］前記不織布の水抽出物量が１０００ｐｐｍ以下である、前記［１］に記載のフェイスマスク用セルロース繊維不織布。
［３］前記不織布を構成する繊維がセルロース繊維１００ｗｔ％である、前記［１］又は［２］に記載のフェイスマスク用セルロース繊維不織布。
［４］前記不織布を構成する繊維が連続長繊維である、前記［１］〜［３］のいずれかに記載のフェイスマスク用セルロース繊維不織布。
［５］前記［１］〜［４］のいずれかに記載のフェイスマスク用セルロース繊維不織布１００重量部に対して、液体化粧料又は清拭用薬液が１００重量部以上２０００重量部以下の範囲の割合で含浸されているフェイスマスク。
[1] The following features:
(1) It has a Sin curve pattern, and the ratio of wavelength to amplitude (wavelength/amplitude) is 1.5 mm/mm or more and 14.0 mm/mm or less;
(2) The formation index in the dry state is in the range of 50 or more and 240 or less; and (3) The transparency in the wet state is 60% or more;
A cellulose fiber non-woven fabric for a face mask, which has:
[2] The cellulose fiber nonwoven fabric for face mask according to the above [1], wherein the amount of water extract of the nonwoven fabric is 1000 ppm or less.
[3] The cellulose fiber nonwoven fabric for face masks according to the above [1] or [2], wherein the fibers constituting the nonwoven fabric are 100 wt% of cellulose fibers.
[4] The cellulose fiber nonwoven fabric for a face mask according to any one of [1] to [3] above, wherein the fibers forming the nonwoven fabric are continuous long fibers.
[5] In the range of 100 parts by weight or more and 2000 parts by weight or less of the liquid cosmetic or the wiping chemical solution, relative to 100 parts by weight of the cellulose fiber nonwoven fabric for face mask according to any one of [1] to [4] above. Face mask that is impregnated in proportion.
本発明の不織布から得られるフェイスマスクは、肌との密着性が高く、薬液を均一に肌へ移行することに優れ、浸透感を実感することができるフェイスマスクである。 The face mask obtained from the nonwoven fabric of the present invention is a face mask that has high adhesion to the skin, is excellent in transferring the drug solution to the skin uniformly, and can actually feel the permeation feeling.
以下、本発明の実施形態を詳細に説明する。
本実施形態に用いるセルロース繊維としては、特に制限はなく銅アンモニアレーヨン、ビスコースレーヨン、テンセル（リヨセル）、ポリノジック等の再生セルロース繊維、コットン、パルプ、麻等の天然セルロース繊維が挙げられるが、再生セルロース繊維が好ましい。連続長繊維でも短繊維でも構わないが、連続長繊維は、短繊維のものよりもよりリントフリー性に優れフェイスマスク着用時のチクチク感がなく、吸液性や強度にも優れている。
本実施形態のフェイスマスク用セルロース繊維不織布には、上記セルロース繊維が５０ｗｔ％以上含まれていることが望ましく、より好ましくは７０ｗｔ％以上であり、更に好ましくは９０ｗｔ％以上である。セルロース繊維が５０ｗｔ％未満であると、薬液の保持性や密着性が十分ではなく、フェイスマスク用不織布としては好ましくない。
Hereinafter, embodiments of the present invention will be described in detail.
The cellulose fiber used in this embodiment is not particularly limited, and examples thereof include regenerated cellulose fibers such as cuprammonium rayon, viscose rayon, tencel (Lyocell), and polynosic, and natural cellulose fibers such as cotton, pulp, and hemp. Cellulose fibers are preferred. Although continuous long fibers or short fibers may be used, continuous long fibers are more excellent in lint-free property than short fibers and have no tingling sensation when wearing a face mask, and also have excellent liquid absorbency and strength.
The cellulose fiber nonwoven fabric for face mask of the present embodiment preferably contains 50 wt% or more of the above cellulose fibers, more preferably 70 wt% or more, and further preferably 90 wt% or more. If the amount of cellulose fibers is less than 50 wt %, the chemical retention and adhesiveness will be insufficient, which is not preferable as a nonwoven fabric for face masks.
バインダーや界面活性剤を付与したフェイスマスク用セルロース繊維不織布は、吸水性の低下や、成分の溶出が懸念されるため、本実施形態のフェイスマスク用セルロース繊維不織布はノーバインダーであることが好ましい。フェイスマスク用不織布の目付としては、２０ｇ／ｍ２以上１２０ｇ／ｍ２以下であることが好ましく、より好ましくは２５ｇ／ｍ２以上１００ｇ／ｍ２以下であり、更に好ましくは３０ｇ／ｍ２以上８０ｇ／ｍ２以下である。フェイスマスク用不織布の目付が２０ｇ／ｍ２未満であると、薄すぎるために取扱性が著しく低下し、実用的でなく、他方、１２０ｇ／ｍ２より大きいと、取扱性は優れるが、厚さが肌の動きに追随せず、着用感が低下する。 The cellulose fiber nonwoven fabric for a face mask provided with a binder or a surfactant is likely to have a reduced water absorption and elution of components. Therefore, the cellulose fiber nonwoven fabric for a face mask of the present embodiment is preferably a non-binder. The basis weight of the nonwoven fabric for face mask is preferably 20 g/m 2 or more and 120 g/m 2 or less, more preferably 25 g/m 2 or more and 100 g/m 2 or less, and further preferably 30 g/m 2 or more and 80 g. /M 2 or less. When the basis weight of the non-woven fabric for face mask is less than 20 g/m 2, it is not practical because it is too thin, and when it is more than 120 g/m 2 , the handleability is excellent, but the thickness Does not follow the movement of the skin, and the wearing feeling is reduced.
本実施形態のフェイスマスク用セルロース繊維不織布の厚みは、０．２０ｍｍ以上０．６０ｍｍ以下であることが好ましい。より好ましくは、０．２５ｍｍ以上０．５０ｍｍ以下であり、更に好ましくは０．２５ｍｍ以上０．４５ｍｍ以下である。フェイスマスク用不織布の厚みが０．２０ｍｍ未満の場合、薄すぎるために地合斑が発生しやすく薬液移行性において均一性が低下する。０．６０ｍｍより大きい場合、湿潤時の透明度の低下やフェイスマスク着用感が低下する。 The thickness of the cellulose fiber nonwoven fabric for face mask of the present embodiment is preferably 0.20 mm or more and 0.60 mm or less. It is more preferably 0.25 mm or more and 0.50 mm or less, and even more preferably 0.25 mm or more and 0.45 mm or less. When the thickness of the non-woven fabric for face mask is less than 0.20 mm, the unevenness of the surface is likely to occur due to the excessive thinness, and the uniformity of the chemical transfer property is deteriorated. If it is larger than 0.60 mm, the transparency when wet and the feeling of wearing a face mask are deteriorated.
本実施形態のフェイスマスク用セルロース繊維不織布は水流交絡による孔により形成されるＳｉｎカーブ模様を有している。Ｓｉｎカーブを有した不織布の場合、フェイスマスクを顔に着用するときに局所的に負荷がかかりフェイスマスクシートが変形することが少なくなった。また、フェイスマスクを顔に着用している最中に不織布へかかる力を分散させることで伸びも抑制することが可能になった。故に、Ｓｉｎカーブ模様はフェイスマスクの密着性に大きく寄与していると言える。更に、乾燥直前に純水高圧水流交絡を施しＳｉｎカーブ模様を有した不織布では吸液量が向上することがわかった。理由は明確ではないが、不織布に粗密部位を周期的に与えることでセルロース繊維間の水素結合力が最大限に発揮されたのではないかと思われる。かかるＳｉｎカーブは、波長と振幅の比（波長／振幅）が１．５ｍｍ／ｍｍ以上１４．０ｍｍ／ｍｍ以下であることが好ましく、より好ましくは３．０ｍｍ／ｍｍ以上１４．０ｍｍ／ｍｍ以下である。フェイスマスク用不織布のＳｉｎカーブの波長と振幅の比が１．５ｍｍ／ｍｍ未満であると、水流交絡によりできた孔数が単位面積当たりで多くなり、不織布の寸法回復性が低下し、密着性が低下する。特に経方向の孔数が増えることから強度が低下し回復性が低くなると考えられる。他方、１４．０ｍｍ／ｍｍより大きいと、緯方向において力の分散性が小さいために不織布が伸びやすく取扱性が低下する。定める範囲の波長と振幅の比であるＳｉｎカーブ模様により、密着性や吸液性が高い不織布が得られる。その結果、フェイスマスク剥離後の顔面上の薬液均一性や薬液移行量にも優れたフェイスマスク用セルロース繊維不織布になる。すなわち、フェイスマスク用不織布には、密着性（着用感）、薬液移行性（薬液量や均一性）、及び浸透する感覚の３つが共に満足されることが要求されるところ、密着性（着用感）は、Ｓｉｎカーブ模様、素材、連続長繊維を選択することにより、薬液移行性（薬液量や均一性）は、不織布の均一性、地合指数、密着性の高さ（Ｓｉｎカーブ模様）を選択することにより、そして浸透する感覚は、透明度を選択することにより、達成されうる。化学刺激性に関しては、如何にして抽出物量が少ない不織布とするかが課題となり、具体的には、親水剤やバインダーの有無と関係する。一般に、顔に着用するフェイスマスク用基材に不純物が入ると好ましくないので、以下の実施例において効果データとして加える。要するに、Ｓｉｎカーブ模様は、「密着性」、「薬液移行性」、「薬液移行量」に影響を及ぼす。前記したように、薬液移行性には、不織布の均一性も大きく影響するところ、地合斑が少ないこと、Ｓｉｎカーブ模様により密着性を発揮することの双方を併せ持った不織布はこれまで提供されていなかった。また、透明性は、薬液の肌への浸透感に直接的に寄与し、不織布が透明から白色に徐々に変化することで、肌へ浸透していることが目で実感できる。 The cellulose fiber non-woven fabric for a face mask of this embodiment has a Sin curve pattern formed by holes due to hydroentanglement. In the case of a non-woven fabric having a Sin curve, the face mask sheet is less likely to be deformed by locally applying a load when the face mask is worn on the face. In addition, by spreading the force applied to the non-woven fabric while wearing the face mask on the face, it has become possible to suppress elongation. Therefore, it can be said that the Sin curve pattern greatly contributes to the adhesion of the face mask. Further, it was found that the non-woven fabric having a Sin curve pattern subjected to pure water high pressure water entanglement immediately before drying improved the liquid absorption amount. Although the reason is not clear, it is considered that the hydrogen bonding force between the cellulose fibers was maximized by periodically providing the non-woven fabric with dense and dense parts. In this Sin curve, the ratio of wavelength to amplitude (wavelength/amplitude) is preferably 1.5 mm/mm or more and 14.0 mm/mm or less, more preferably 3.0 mm/mm or more and 14.0 mm/mm or less. is there. If the wavelength-amplitude ratio of the Sin curve of the non-woven fabric for face mask is less than 1.5 mm/mm, the number of holes created by hydroentangling per unit area will increase and the dimensional recovery of the non-woven fabric will decrease, resulting in poor adhesion. Is reduced. In particular, it is considered that the strength decreases and the recoverability decreases because the number of holes in the longitudinal direction increases. On the other hand, when it is larger than 14.0 mm/mm, the dispersibility of the force is small in the weft direction, so that the nonwoven fabric is easily stretched and the handleability is deteriorated. The Sin curve pattern, which is the ratio of the wavelength to the amplitude in the defined range, provides a non-woven fabric having high adhesiveness and liquid absorption. As a result, a cellulose fiber non-woven fabric for a face mask is obtained which is excellent in the uniformity of the liquid medicine on the face after the face mask is peeled off and the amount of the liquid medicine transferred. That is, the non-woven fabric for a face mask is required to satisfy all three requirements of adhesion (wearing feeling), drug solution transferability (chemical solution amount and uniformity), and permeation sensation. ) Is the Sin curve pattern, the material, and the continuous filaments are selected to determine the chemical transferability (chemical solution amount and uniformity) of the nonwoven fabric uniformity, formation index, and high adhesion (Sin curve pattern). By choice, and the sensation of penetration can be achieved by choosing transparency. Regarding chemical irritation, how to make a nonwoven fabric with a small amount of extract is an issue, and specifically, it is related to the presence or absence of a hydrophilic agent or a binder. In general, it is not preferable for impurities to enter the face mask base material to be worn on the face, and therefore it is added as effect data in the following examples. In short, the Sin curve pattern affects “adhesion”, “drug transfer”, and “drug transfer amount”. As mentioned above, the non-woven fabric having both the non-uniformity of the formation and the adhesiveness due to the Sin curve pattern has been provided so far, although the non-uniformity of the non-woven fabric greatly influences the migration of the chemical liquid. There wasn't. Further, the transparency directly contributes to the permeation feeling of the drug solution into the skin, and it can be visually perceived that the non-woven fabric permeates into the skin by gradually changing from transparent to white.
本実施形態のフェイスマスク用不織布の乾燥状態における地合指数が５０以上２４０以下であることが好ましい。より好ましくは１００以上２４０以下である。フェイスマスク用不織布の乾燥状態における地合指数が５０未満の場合、Ｓｉｎカーブ模様が不明瞭となりフェイスマスク密着性が低下する。２４０より大きい場合、不織布が不均一であるためフェイスマスク着用後の薬液移行性が不均一になる。 It is preferable that the non-woven fabric for face mask of the present embodiment has a formation index in a dry state of 50 or more and 240 or less. It is more preferably 100 or more and 240 or less. When the formation index in the dry state of the non-woven fabric for face mask is less than 50, the Sin curve pattern becomes unclear and the face mask adhesiveness deteriorates. If it is larger than 240, the non-woven fabric is non-uniform and the chemical liquid transfer property after wearing the face mask is non-uniform.
本実施形態のフェイスマスク用セルロース繊維不織布の湿潤時の透明度は、６０％以上１００％以下であることが好ましく、より好ましくは６２％以上１００％以下である。フェイスマスク用セルロース繊維不織布の湿潤時の透明度が６０％未満であると、薬液が肌に浸透する感覚を認識し難い。 The cellulose fiber nonwoven fabric for face mask of the present embodiment has a transparency of preferably 60% or more and 100% or less, more preferably 62% or more and 100% or less when wet. If the transparency of the cellulose fiber nonwoven fabric for face mask when wet is less than 60%, it is difficult to recognize the sensation that the drug solution penetrates the skin.
本実施形態のフェイスマスク用セルロース繊維不織布の蒸留水による抽出物量は、不織布１ｋｇ当たり１０００ｍｇ以下であることが好ましく、より好ましくは９００ｍｇ／ｋｇ以下であり、更に好ましくは８００ｍｇ／ｋｇ以下である。フェイスマスク用セルロース繊維不織布の蒸留水による抽出物量が１０００ｍｇ／ｋｇより大きいと、フェイスマスク着用時に不純物の溶出が無視できず、化粧品用途では好ましくない。 The amount of the extract of the cellulose fiber non-woven fabric for face mask of this embodiment with distilled water is preferably 1000 mg or less per 1 kg of the non-woven fabric, more preferably 900 mg/kg or less, and further preferably 800 mg/kg or less. If the amount of the extract of the cellulose fiber non-woven fabric for face mask with distilled water is larger than 1000 mg/kg, the elution of impurities cannot be ignored when the face mask is worn, which is not preferable for cosmetic use.
本実施形態のフェイスマスク用セルロース繊維不織布の製法は、例えば、以下のようである。
紡出した糸をネット上に振り落してシート状に積層した後、水流交絡を受ける。乾燥工程に入る直前の水流交絡において、純水を用いた高圧条件にて水流交絡を行う。乾燥工程に入る直前の水流交絡において、ウエブの進行方向と直角に往復運動するノズルから高圧条件で水流交絡を施すことでＳｉｎカーブ模様が鮮明となる。乾燥工程直前以外の水流交絡を高圧にした場合、繊維が泳ぎ地合斑が発生するため好ましくない。また、純水を用いた高圧水流交絡により不純物を取り除くことで透明度を上げ、抽出物量を下げることができる。
The method for producing the cellulose fiber nonwoven fabric for face mask of the present embodiment is as follows, for example.
The spun yarn is shaken off on a net and laminated into a sheet, and then hydroentangled. In the water entanglement immediately before entering the drying step, the water entanglement is performed under high pressure conditions using pure water. In the water entanglement immediately before entering the drying step, the water entanglement is performed under the high pressure condition from the nozzle that reciprocates at right angles to the traveling direction of the web, so that the Sin curve pattern becomes clear. When the hydroentangling other than immediately before the drying step is performed under high pressure, the fibers swim and the formation of spots on the ground occurs, which is not preferable. In addition, by removing impurities by high-pressure water entanglement using pure water, transparency can be increased and the amount of extract can be reduced.
以下、本発明を実施例により具体的に説明するが、本発明はこれらの実施例のみに何ら限定されるものではない。実施例に使用した測定方法を以下に示す。
（１）目付（ｇ／ｍ２）
０．０５ｍ２以上の面積のフェイスマスク用セルロース繊維不織布を１０５℃で一定質量になるまで乾燥後、２０℃、６５％ＲＨの恒温室に１６時間以上放置し、その質量を測定し、不織布ｍ２当たりの質量（ｇ）を求めた。
Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited to these examples. The measuring methods used in the examples are shown below.
(1) Unit weight (g/m 2 )
A cellulose fiber nonwoven fabric for a face mask having an area of 0.05 m 2 or more is dried at 105° C. to a constant mass, and then left in a thermostatic chamber at 20° C. and 65% RH for 16 hours or more, and the mass is measured. The mass (g) per 2 was determined.
（２）厚み（ｍｍ）
フェイスマスク用セルロース繊維不織布をＪＩＳ−Ｌ１０９６準拠の厚み試験に従い、荷重１．９６ｋＰａとして測定した。
(2) Thickness (mm)
The cellulose fiber nonwoven fabric for face mask was measured under a load of 1.96 kPa according to a thickness test according to JIS-L1096.
（３）Ｓｉｎカーブ波長と振幅の比（ｍｍ／ｍｍ）
フェイスマスク用セルロース繊維不織布のＳｉｎカーブ模様の波長Ａ（ｍｍ）と振幅Ｂ（ｍｍ）を、３ヶ所、それぞれ、５回ずつ計測し、次式により算出した。
Ｓｉｎカーブ波長と振幅の比（ｍｍ／ｍｍ）＝ Ａ ／ Ｂ
(3) Sin curve Wavelength to amplitude ratio (mm/mm)
The wavelength A (mm) and the amplitude B (mm) of the Sin curve pattern of the cellulose fiber non-woven fabric for face masks were measured 5 times at 3 locations and calculated by the following formula.
Sin curve wavelength/amplitude ratio (mm/mm) = A / B
（４）乾燥状態における地合指数
２０ｃｍ×２０ｃｍのフェイスマスク用不織布の地合指数を、地合計（野村商事製ＦＭＴ−Ｍ ＩＩＩ）を用いて測定した。
(4) Texture index in dry state The texture index of a non-woven fabric for a face mask having a size of 20 cm×20 cm was measured by using a texture sum (FMT-M III manufactured by Nomura Shoji).
（５）湿潤時の透明度（％）
５ｃｍ×５ｃｍのフェイスマスク用セルロース繊維不織布をメッシュ（１０メッシュ、線径０．５ｍｍ）の上に載せ、これをバットに入れた水の中に入れて３０秒間浸漬した。その後、メッシュを引き上げて１０分間放置した後、過剰な水、水溶液を濾紙などで拭き取った。含水状態の不織布をガラス板に挟み、スガ試験機株式会社製積分球方式ＳＭ−Ｔを用いてＬ値を５回測定し、その平均値Ｃを用いて次式により湿潤時の透明度（％）を算出した。この時、ガラス板のみのＬ値も５回測定し、その平均値をＤとした。
湿潤時の透明度 ＝ １００−（Ｃ−Ｄ）
(5) Transparency when wet (%)
A 5 cm x 5 cm cellulose fiber nonwoven fabric for a face mask was placed on a mesh (10 mesh, wire diameter 0.5 mm), which was placed in water in a vat and immersed for 30 seconds. Then, the mesh was pulled up and left for 10 minutes, and then excess water and aqueous solution were wiped off with a filter paper or the like. A non-woven fabric in a water-containing state is sandwiched between glass plates, L value is measured 5 times using an integrating sphere method SM-T manufactured by Suga Test Instruments Co., Ltd., and the average value C is used to obtain the transparency (%) when wet according to the following formula. Was calculated. At this time, the L value of only the glass plate was also measured 5 times, and the average value was defined as D.
Transparency when wet = 100-(C-D)
（６）抽出物量（ｍｇ／ｋｇ）
フェイスマスク用セルロース繊維不織布４０ｇを入れたガラス瓶に蒸留水６４０ｇを加え、蓋をして１６時間放置した。抽出液は、濾過することによって繊維くずを取り除き、質量Ｅ（ｇ）を測定した。その後、濾過した抽出液は減圧蒸留を行い、抽出物（固体）の質量Ｆ（ｇ）を測定し、次式により抽出物量を算出した。
抽出物量 ＝ Ｆ／｛（Ｅ／６４０）×４０｝×１００００００
(6) Extract amount (mg/kg)
640 g of distilled water was added to a glass bottle containing 40 g of a cellulose fiber non-woven fabric for a face mask, the lid was covered, and the mixture was left for 16 hours. The extract was filtered to remove fiber debris, and the mass E (g) was measured. Then, the filtered extract was subjected to vacuum distillation, the mass F (g) of the extract (solid) was measured, and the amount of extract was calculated by the following formula.
Extract amount=F/{(E/640)×40}×1000000
（７）着用感（点）
フェイスマスクの付け心地がどのように感じるのか、被験者２０人での官能評価を行った。評価方法と判定基準は以下のとおりであり、２０人の平均値をそのサンプルの着用感官能評価の値とした。
評価方法：フェイスマスク型の不織布を蒸留水に浸漬させて１０分後、液だれがしない程度に軽く絞り、顔に貼りつけて、以下の判定項目について、以下の判断基準で評価した。
＜判定項目＞
１）肌への密着性が高い。
２）小顔効果が実感できる。
３）薬液が肌に浸透する感じがある。
４）着用時の不快感がない。
＜判断基準＞
５点：判断項目１〜４を全て満たす。
４点：判断項目１〜４の内３つの項目を満たす。
３点：判断項目１〜４の内２つの項目を満たす。
２点：判断項目１〜４の内１つの項目を満たす。
１点：判断項目１〜４の何れの項目も満たさない。
(7) Feeling of wearing (point)
A sensory evaluation was carried out by 20 test subjects as to how the comfort of wearing the face mask was felt. The evaluation method and the judgment criteria are as follows, and the average value of 20 people was used as the value of the sensory evaluation of wearing feeling of the sample.
Evaluation method: A face mask type non-woven fabric was immersed in distilled water for 10 minutes, and then lightly squeezed to such an extent that no liquid dripping was applied to the face, and the following judgment items were evaluated according to the following judgment criteria.
<Judgment item>
1) High adhesion to the skin.
2) You can feel the small face effect.
3) There is a feeling that the drug solution penetrates the skin.
4) No discomfort when worn.
<Judgment criteria>
5 points: All judgment items 1 to 4 are satisfied.
4 points: Three of the judgment items 1 to 4 are satisfied.
3 points: Two of the judgment items 1 to 4 are satisfied.
2 points: One of the judgment items 1 to 4 is satisfied.
1 point: None of the judgment items 1 to 4 is satisfied.
（８）薬液移行性（点）
マネキンを用いて官能評価を行った。評価方法と判定水準は以下の通りであり、２０回の平均値をそのサンプルの薬液移行性の点数とした。
評価方法：フェイスマスク型の不織布１００重量部に対して赤色インクで着色した市販の化粧水（資生堂製）を１５００重量部付与し薬液をＦＭ全体に浸透させた。薬液が浸透したＦＭ型の不織布をマネキンへ貼り付け２０分後に剥離し、マネキン顔面上の薬液分布を観察し、以下の判断基準で評価した。
＜判定基準＞
３：顔全体に薬液が均一に分布している。
２：顔全体に薬液が分布しているが薬液量に斑がある。
１：顔全体に薬液が均一に分布していない。
(8) Drug solution transferability (points)
Sensory evaluation was performed using a mannequin. The evaluation method and the judgment level are as follows, and the average value of 20 times was used as the score of the drug solution transferability of the sample.
Evaluation method: 1500 parts by weight of commercially available lotion (manufactured by Shiseido Co., Ltd.) colored with a red ink was applied to 100 parts by weight of a face mask type non-woven fabric, and the liquid medicine was allowed to permeate the entire FM. The FM type non-woven fabric infiltrated with the drug solution was attached to the mannequin and peeled off after 20 minutes, and the drug solution distribution on the face of the mannequin was observed and evaluated according to the following criteria.
<Judgment criteria>
3: The liquid medicine is uniformly distributed over the entire face.
2: The drug solution is distributed over the entire face, but the amount of the drug solution is uneven.
1: The drug solution was not evenly distributed on the entire face.
（９）薬液移行量（％）
薬液移行性試験において、マネキンへ貼り付ける直前において不織布が保持している薬液量Ｇ（ｇ）、剥離後不織布に残った薬液量Ｈ（ｇ）を測定し、次式により算出した。
薬液移行量（％） ＝ （Ｇ−Ｈ）／Ｇ ×１００
(9) Transfer of chemical solution (%)
In the drug solution migration test, the amount of drug solution G (g) held by the nonwoven fabric immediately before being attached to the mannequin and the amount of drug solution H (g) remaining in the nonwoven fabric after peeling were measured and calculated by the following formula.
Transfer of chemical liquid (%) = (GH)/G x 100
（１０）化学的刺激性
純水１５０ｍＬが入ったビーカーに、サンプル５ｇを浸漬させる。５分後、ビーカーを１分間振りながら撹拌する。１００ｍＬのメスシリンダーに６０ｍＬの抽出液を取り、蓋をして上下に２０回振った。メスシリンダーを立てて１分間放置した時の泡立ちの状態を観察し、以下の判断基準で化学的刺激性を評価した。
＜判定基準＞
○：泡が無い状態か、ほとんど泡が目立たず液面に薄い筋状の泡が残る程度で壁面には泡は付着しない。
×：液面上に明らかに泡と分かる層が形成されており、シリンダーの壁面にも泡が付着している。
(10) Chemical irritation 5 g of the sample is immersed in a beaker containing 150 mL of pure water. After 5 minutes, shake the beaker for 1 minute and stir. 60 mL of the extract was put into a 100 mL graduated cylinder, covered, and shaken up and down 20 times. The state of foaming when the measuring cylinder was stood up and left for 1 minute was observed, and the chemical irritation was evaluated according to the following criteria.
<Judgment criteria>
◯: No bubbles, or almost no bubbles were conspicuous and thin streak bubbles remained on the liquid surface, and no bubbles adhered to the wall surface.
X: A layer that is clearly recognized as a bubble is formed on the liquid surface, and the bubble also adheres to the wall surface of the cylinder.
［実施例１］
コットンリンターを銅アンモニア溶液で溶解し（コットンリンター１０ｗｔ％、アンモニア７ｗｔ％、銅３ｗｔ％）紡糸原液を準備した。紡糸原液を流下緊張下で連続してネット上に５層重ねで紡糸してセルロース連続長繊維ウエブを得た。得られたセルロース連続長繊維ウエブを希硫酸で再生し、水洗後得られた再生セルロース連続長繊維ウエブをコンベアーネット上にて２ＭＰａの低圧水流によって２回水流交絡処理を行った。得られたシートをウエブの進行方向と直角に振幅５．８ｍｍで往復運動させた６ＭＰａの純水高圧水流にて１回水流交絡させた後、１００℃の熱風で乾燥を行い、Ｓｉｎカーブ模様を有した再生セルロース連続長繊維不織布を得た。尚、ネットスピードは３０ｍ／ｍｉｎ．であった。得られた再生セルロース連続長繊維不織布は、目付が３９．９ｇ／ｍ２、厚みが０．２６ｍｍであった。得られた不織布の特性を以下の表１に、フェイスマスク用不織布としての評価結果を以下の表２に示す。
[Example 1]
Cotton linter was dissolved in a copper ammonia solution (cotton linter 10 wt %, ammonia 7 wt %, copper 3 wt %) to prepare a spinning dope. The spinning dope was continuously spun on the net in a five-layer stack under flowing tension to obtain a continuous cellulose long fiber web. The obtained continuous cellulose long fiber web was regenerated with dilute sulfuric acid, and after washing with water, the regenerated continuous cellulose long fiber web was hydroentangled twice with a low pressure water flow of 2 MPa on a conveyor net. The obtained sheet was hydroentangled once with 6 MPa pure water high-pressure water stream that was reciprocally moved at an amplitude of 5.8 mm at right angles to the traveling direction of the web, and then dried with hot air at 100° C. to obtain a Sin curve pattern. The regenerated cellulose continuous long-fiber non-woven fabric was obtained. The net speed is 30m/min. Met. The obtained regenerated cellulose continuous long-fiber nonwoven fabric had a basis weight of 39.9 g/m 2 and a thickness of 0.26 mm. The characteristics of the obtained nonwoven fabric are shown in Table 1 below, and the evaluation results of the nonwoven fabric for face masks are shown in Table 2 below.
［実施例２］
ネットスピードを２０ｍ／ｍｉｎ．にし、往復運動の振幅を４．２ｍｍにしたこと以外は実施例１と同様の条件にて再生セルロース連続長繊維不織布を得た。得られた再生セルロース連続長繊維不織布は、目付が５９．７ｇ／ｍ２、厚みが０．４４ｍｍであった。得られた不織布の特性を以下の表１に、フェイスマスク用不織布としての評価結果を以下の表２に示す。
[Example 2]
Net speed is 20m/min. Then, a regenerated cellulose continuous long-fiber nonwoven fabric was obtained under the same conditions as in Example 1 except that the amplitude of the reciprocating motion was 4.2 mm. The obtained regenerated cellulose continuous filament non-woven fabric had a basis weight of 59.7 g/m 2 and a thickness of 0.44 mm. The characteristics of the obtained nonwoven fabric are shown in Table 1 below, and the evaluation results of the nonwoven fabric for face masks are shown in Table 2 below.
［実施例３］
ネットスピードを２５ｍ／ｍｉｎ．にし、純水高圧水流にて水流交絡をせずに乾燥させたこと以外は実施例１と同様の条件にて再生セルロース連続長繊維不織布を得た。得られた再生セルロース連続長繊維不織布を２枚重ねてウエブの進行方向と直角に振幅７．９ｍｍで往復運動させた６ＭＰａの純水高圧水流にて１回水流交絡させた後、１００℃の熱風で乾燥を行い、Ｓｉｎカーブ模様を有した再生セルロース連続長繊維不織布を得た。尚、ネットスピードは１４ｍ／ｍｉｎ．であった。得られた再生セルロース連続長繊維不織布は、目付が９９．８ｇ／ｍ２、厚みが０．４５ｍｍであった。得られた不織布の特性を以下の表１に、フェイスマスク用不織布としての評価結果を以下の表２に示す。
[Example 3]
Net speed is 25m/min. Then, a regenerated cellulose continuous filament non-woven fabric was obtained under the same conditions as in Example 1 except that the non-woven fabric was dried with a pure water high-pressure water stream without being hydroentangled. Two regenerated cellulose continuous long-fiber nonwoven fabrics were superposed and reciprocated at an amplitude of 7.9 mm at right angles to the direction of web movement, and hydroentangled once with 6 MPa pure water high-pressure water flow, and then hot air at 100°C. And dried to obtain a regenerated cellulose continuous long fiber nonwoven fabric having a Sin curve pattern. The net speed is 14m/min. Met. The obtained regenerated cellulose continuous long-fiber nonwoven fabric had a basis weight of 99.8 g/m 2 and a thickness of 0.45 mm. The characteristics of the obtained nonwoven fabric are shown in Table 1 below, and the evaluation results of the nonwoven fabric for face masks are shown in Table 2 below.
［実施例４］
パルプをＮ−メチルモルフォリン−Ｎ−オキシド（ＮＭＭＯ）溶液で溶解し（パルプ１０ｗｔ％、ＮＭＭＯ５５ｗｔ％、水４５ｗｔ％）紡糸原液を準備した。紡糸原液をメルトブロー法で連続してネット上に７層重ねで紡糸してセルロース連続長繊維ウエブを得た。得られたセルロース連続長繊維ウエブを希ＮＭＭＯで再生し、水洗後得られた再生セルロース連続長繊維ウエブをコンベアーネット上にて２ＭＰａの低圧水流によって２回水流交絡処理を行った。得られたシートをウエブの進行方向と直角に振幅３．５ｍｍで往復運動させた６ＭＰａの純水高圧水流にて１回水流交絡させた後、１００℃の熱風で乾燥を行い、Ｓｉｎカーブ模様を有した再生セルロース連続長繊維不織布を得た。尚、ネットスピードは２０ｍ／ｍｉｎ．であった。得られた再生セルロース連続長繊維不織布は、目付が４０．４ｇ／ｍ２、厚みが０．２５ｍｍであった。得られた不織布の特性を以下の表１に、フェイスマスク用不織布としての評価結果を以下の表２に示す。
[Example 4]
The pulp was dissolved in an N-methylmorpholine-N-oxide (NMMO) solution (pulp 10 wt %, NMMO 55 wt %, water 45 wt %) to prepare a spinning dope. The spinning dope was continuously spun on a net in a 7-layer stack by a melt blow method to obtain a continuous cellulose long fiber web. The obtained continuous cellulose long fiber web was regenerated with diluted NMMO, and after washing with water, the regenerated continuous cellulose fiber web was subjected to a hydroentangling treatment twice on a conveyor net with a low pressure water flow of 2 MPa. The obtained sheet was hydroentangled once with a 6 MPa pure water high-pressure water stream reciprocating with an amplitude of 3.5 mm at right angles to the direction of travel of the web, and then dried with hot air at 100° C. to give a Sin curve pattern. The regenerated cellulose continuous long-fiber non-woven fabric was obtained. The net speed is 20m/min. Met. The obtained regenerated cellulose continuous long-fiber nonwoven fabric had a basis weight of 40.4 g/m 2 and a thickness of 0.25 mm. The characteristics of the obtained nonwoven fabric are shown in Table 1 below, and the evaluation results of the nonwoven fabric for face masks are shown in Table 2 below.
［実施例５］
旭化成せんい（株）製のベンベルグ（登録商標）短繊維（素材名キュプラ）１．４ｄｔｅｘ×３８ｍｍの綿を用いて、スパンレース製造設備を用いて４５ｇ／ｍ２のカードウエブを作製した。得られたカードウエブをコンベアーネット上にて２ＭＰａの低圧水流によって２回水流交絡処理を行った。得られたシートをウエブの進行方向と直角に４．４ｍｍ往復運動させた６ＭＰａの純水高圧水流にて１回水流交絡させた後、１００℃の熱風で乾燥を行い、Ｓｉｎカーブ模様を有した再生セルロース短繊維不織布を得た。尚、ネットスピードは１４ｍ／ｍｉｎ．であった。得られた再生セルロース短繊維不織布は、目付が４５．１ｇ／ｍ２、厚みが０．３８ｍｍであった。得られた不織布の特性を以下の表１に、フェイスマスク用不織布としての評価結果を以下の表２に示す。
[Example 5]
A Bemberg (registered trademark) short fiber (material name: Cupra) 1.4 dtex×38 mm cotton manufactured by Asahi Kasei Fibers Ltd. was used to produce a card web of 45 g/m 2 using a spunlace manufacturing facility. The obtained card web was subjected to hydroentangling treatment twice with a low-pressure water flow of 2 MPa on a conveyor net. The obtained sheet was hydroentangled once with a 6 MPa pure water high-pressure water stream that was reciprocated 4.4 mm at right angles to the direction of travel of the web, and then dried with hot air at 100° C. to have a Sin curve pattern. A regenerated cellulose short fiber nonwoven fabric was obtained. The net speed is 14m/min. Met. The obtained regenerated cellulose short fiber nonwoven fabric had a basis weight of 45.1 g/m 2 and a thickness of 0.38 mm. The characteristics of the obtained nonwoven fabric are shown in Table 1 below, and the evaluation results of the nonwoven fabric for face masks are shown in Table 2 below.
［実施例６］
市販のリヨセル短繊維０．９ｄｔｅｘ×３５ｍｍの綿を用いたこと以外は実施例５と同様の条件にて再生セルロース短繊維不織布を得た。得られた再生セルロース短繊維不織布は、目付が４３．１ｇ／ｍ２、厚みが０．３５ｍｍであった。得られた不織布の特性を以下の表１に、フェイスマスク用不織布としての評価結果を以下の表２に示す。
[Example 6]
A regenerated cellulose short fiber nonwoven fabric was obtained under the same conditions as in Example 5 except that commercially available cotton of Lyocell short fiber 0.9 dtex×35 mm was used. The obtained regenerated cellulose short fiber nonwoven fabric had a basis weight of 43.1 g/m 2 and a thickness of 0.35 mm. The characteristics of the obtained nonwoven fabric are shown in Table 1 below, and the evaluation results of the nonwoven fabric for face masks are shown in Table 2 below.
［実施例７］
旭化成せんい（株）製のベンベルグ（登録商標）短繊維（素材名キュプラ）１．４ｄｔｅｘ×３８ｍｍの綿を７０ｗｔ％、市販のリヨセル短繊維０．９ｄｔｅｘ×３５ｍｍの綿を３０ｗｔ％用いたこと以外は実施例５と同様の条件にて再生セルロース短繊維不織布を得た。得られた再生セルロース短繊維不織布は、目付が４４．５ｇ／ｍ２、厚みが０．４１ｍｍであった。得られた不織布の特性を表１に、フェイスマスク用不織布としての評価結果を表２に示す。
[Example 7]
Bemberg (registered trademark) short fiber (material name: cupra) manufactured by Asahi Kasei Fibers Co., Ltd. 1.4 dtex×38 mm cotton 70 wt%, except that commercially available Lyocell short fiber 0.9 dtex×35 mm cotton 30 wt% A regenerated cellulose short fiber nonwoven fabric was obtained under the same conditions as in Example 5. The obtained regenerated cellulose short fiber nonwoven fabric had a basis weight of 44.5 g/m 2 and a thickness of 0.41 mm. The characteristics of the obtained non-woven fabric are shown in Table 1, and the evaluation results of the non-woven fabric for face mask are shown in Table 2.
［実施例８］
旭化成せんい（株）製のベンベルグ（登録商標）短繊維（素材名キュプラ）１．４ｄｔｅｘ×３８ｍｍの綿を８０ｗｔ％、市販のポリエチレンテレフタレート製の綿１．７ｄｔｅｘ×５１ｍｍを２０ｗｔ％の割合で混ぜた綿を用いて、スパンレース製造設備を用いて３５ｇ／ｍ２のカードウエブを作製したこと以外は実施例５と同様の条件にてセルロース短繊維不織布を得た。得られたセルロース短繊維不織布は、目付が３４．７ｇ／ｍ２、厚みが０．３３ｍｍであった。得られた不織布の特性を以下の表１に、フェイスマスク用不織布としての評価結果を以下の表２に示す。
[Example 8]
Bemberg (registered trademark) short fibers (material name: cupra) 1.4 dtex×38 mm cotton manufactured by Asahi Kasei Fibers Co., Ltd. were mixed at 80 wt% and commercially available polyethylene terephthalate cotton 1.7 dtex×51 mm were mixed at a ratio of 20 wt %. A cellulose short fiber nonwoven fabric was obtained under the same conditions as in Example 5, except that a 35 g/m 2 card web was produced using cotton using a spunlace production facility. The obtained cellulose short fiber nonwoven fabric had a basis weight of 34.7 g/m 2 and a thickness of 0.33 mm. The characteristics of the obtained nonwoven fabric are shown in Table 1 below, and the evaluation results of the nonwoven fabric for face masks are shown in Table 2 below.
［比較例１］
コットンリンターを銅アンモニア溶液で溶解し（コットンリンター１０ｗｔ％、アンモニア７ｗｔ％、銅３ｗｔ％）紡糸原液を準備した。紡糸原液を流下緊張下で連続してネット上に５層重ねで紡糸してセルロース連続長繊維ウエブを得た。得られたセルロース連続長繊維ウエブを希硫酸で再生し、水洗後得られた再生セルロース連続長繊維ウエブをコンベアーネット上にてウエブの進行方向と直角に振幅３．１ｍｍで往復運動させた３ＭＰａの低圧水流によって３回水流交絡処理を行った。水流交絡させた後、１００℃の熱風で乾燥を行い、Ｓｉｎカーブ模様を有した再生セルロース連続長繊維不織布を得た。尚、ネットスピードは２５ｍ／ｍｉｎ．であった。得られた再生セルロース連続長繊維不織布は、目付が３８．１ｇ／ｍ２、厚みが０．３２ｍｍであった。得られた不織布の特性を以下の表１に、フェイスマスク用不織布としての評価結果を以下の表２に示す。
[Comparative Example 1]
Cotton linter was dissolved in a copper ammonia solution (cotton linter 10 wt %, ammonia 7 wt %, copper 3 wt %) to prepare a spinning dope. The spinning dope was continuously spun on the net in a five-layer stack under flowing tension to obtain a continuous cellulose long fiber web. The obtained cellulose continuous long fiber web was regenerated with dilute sulfuric acid, and after washing with water, the regenerated cellulose continuous long fiber web was reciprocated on a conveyor net at an amplitude of 3.1 mm at a right angle to the traveling direction of the web of 3 MPa. The hydroentanglement treatment was performed three times with the low-pressure water stream. After hydroentangling, it was dried with hot air at 100° C. to obtain a regenerated cellulose continuous long fiber nonwoven fabric having a Sin curve pattern. The net speed is 25m/min. Met. The obtained regenerated cellulose continuous long-fiber nonwoven fabric had a basis weight of 38.1 g/m 2 and a thickness of 0.32 mm. The characteristics of the obtained nonwoven fabric are shown in Table 1 below, and the evaluation results of the nonwoven fabric for face masks are shown in Table 2 below.
［比較例２］
ネットスピードを１７ｍ／ｍｉｎ．にし、往復運動の振幅を２．９ｍｍにしたこと以外は比較例１と同様の条件にて再生セルロース連続長繊維不織布を得た。得られた再生セルロース連続長繊維不織布は、目付が５９．５ｇ／ｍ２、厚みが０．４０ｍｍであった。得られた不織布の特性を以下の表１に、フェイスマスク用不織布としての評価結果を以下の表２に示す。
[Comparative example 2]
Net speed is 17m/min. Then, a regenerated cellulose continuous long fiber nonwoven fabric was obtained under the same conditions as in Comparative Example 1 except that the amplitude of the reciprocating motion was 2.9 mm. The obtained regenerated cellulose continuous long-fiber nonwoven fabric had a basis weight of 59.5 g/m 2 and a thickness of 0.40 mm. The characteristics of the obtained nonwoven fabric are shown in Table 1 below, and the evaluation results of the nonwoven fabric for face masks are shown in Table 2 below.
［比較例３］
ネットスピードを２０ｍ／ｍｉｎ．にしたこと以外は比較例１と同様の条件にて再生セルロース連続長繊維不織布を得た。得られた再生セルロース連続長繊維不織布を２枚重ねてウエブの進行方向と直角に振幅８．０ｍｍで往復運動させた６ＭＰａの低圧水流にて１回水流交絡させた後、１００℃の熱風で乾燥を行い、Ｓｉｎカーブ模様を有した再生セルロース連続長繊維不織布を得た。尚、ネットスピードは５ｍ／ｍｉｎ．であった。得られた再生セルロース連続長繊維不織布は、目付が９８．１ｇ／ｍ２、厚みが０．４５ｍｍであった。得られた不織布の特性を以下の表１に、フェイスマスク用不織布としての評価結果を以下の表２に示す。
[Comparative Example 3]
Net speed is 20m/min. A regenerated cellulose continuous filament non-woven fabric was obtained under the same conditions as in Comparative Example 1 except for the above. Two pieces of the obtained regenerated cellulose continuous long-fiber nonwoven fabric were superposed and water was entangled once with a low pressure water flow of 6 MPa which was reciprocally moved at an amplitude of 8.0 mm at right angles to the traveling direction of the web, and then dried with hot air at 100°C. Then, a regenerated cellulose continuous long-fiber nonwoven fabric having a Sin curve pattern was obtained. The net speed is 5m/min. Met. The obtained regenerated cellulose continuous long-fiber nonwoven fabric had a basis weight of 98.1 g/m 2 and a thickness of 0.45 mm. The characteristics of the obtained nonwoven fabric are shown in Table 1 below, and the evaluation results of the nonwoven fabric for face masks are shown in Table 2 below.
［比較例４］
市販の再生セルロース繊維不織布（リヨセル製不織布）の特性測定と評価を行なった。目付が３６．９ｇ／ｍ２、厚みが０．２７ｍｍであった。得られた不織布の特性を以下の表１に、フェイスマスク用不織布としての評価結果を以下の表２に示す。
[Comparative Example 4]
The properties of a commercially available regenerated cellulose fiber non-woven fabric (Lyocell non-woven fabric) were measured and evaluated. The basis weight was 36.9 g/m 2 and the thickness was 0.27 mm. The characteristics of the obtained nonwoven fabric are shown in Table 1 below, and the evaluation results of the nonwoven fabric for face masks are shown in Table 2 below.
［比較例５］
市販の再生セルロース繊維不織布（レーヨン製不織布）の特性測定と評価を行なった。目付が６４．６ｇ／ｍ２、厚みが０．３８ｍｍであった。得られた不織布の特性を以下の表１に、フェイスマスク用不織布としての評価結果を以下の表２に示す。
[Comparative Example 5]
The properties of commercially available regenerated cellulose fiber nonwoven fabric (rayon nonwoven fabric) were measured and evaluated. The areal weight was 64.6 g/m 2 , and the thickness was 0.38 mm. The characteristics of the obtained nonwoven fabric are shown in Table 1 below, and the evaluation results of the nonwoven fabric for face masks are shown in Table 2 below.
［比較例６］
ネットスピードを３ｍ／ｍｉｎ．にし、往復運動の振幅を５．４ｍｍにしたこと以外は実施例５と同様の条件にて再生セルロース短繊維不織布を得た。得られた再生セルロース短繊維不織布は、目付が４５．７ｇ／ｍ２、厚みが０．３６ｍｍであった。得られた不織布の特性を以下の表１に、フェイスマスク用不織布としての評価結果を以下の表２に示す。
[Comparative Example 6]
Net speed 3m/min. Then, a regenerated cellulose short fiber nonwoven fabric was obtained under the same conditions as in Example 5 except that the amplitude of the reciprocating motion was set to 5.4 mm. The obtained regenerated cellulose short fiber nonwoven fabric had a basis weight of 45.7 g/m 2 and a thickness of 0.36 mm. The characteristics of the obtained nonwoven fabric are shown in Table 1 below, and the evaluation results of the nonwoven fabric for face masks are shown in Table 2 below.
表２に示すとおり、本発明のフェイスマスク用不織布は、着用感及び薬液移行性に優れ、肌への低刺激性にも優れている。 As shown in Table 2, the non-woven fabric for face masks of the present invention is excellent in wearing feeling and drug solution transferability, and is also excellent in low irritation to the skin.
本発明のフェイスマスク用セルロース繊維不織布は、肌との密着性が高く、薬液を均一に肌へ移行することに優れ、浸透感を実感することができるフェイスマスク用不織布であり、産業上の利用価値は極めて大きい。 The cellulose fiber non-woven fabric for face mask of the present invention is a non-woven fabric for face mask, which has high adhesion to the skin, is excellent in uniformly transferring the liquid medicine to the skin, and can be perceived as a penetrating sensation. The value is extremely large.
Claims (5)
（１）Ｓｉｎカーブ模様を有しており、波長と振幅の比（波長／振幅）が１．５ｍｍ／ｍｍ以上１４．０ｍｍ／ｍｍ以下である；
（２）乾燥状態における地合指数が５０以上２４０以下の範囲である；及び
（３）湿潤状態における透明度が６０％以上である；
を有する、フェイスマスク用セルロース繊維不織布。 The following features:
(1) It has a Sin curve pattern, and the ratio of wavelength to amplitude (wavelength/amplitude) is 1.5 mm/mm or more and 14.0 mm/mm or less;
(2) The formation index in the dry state is in the range of 50 or more and 240 or less; and (3) The transparency in the wet state is 60% or more;
A cellulose fiber non-woven fabric for a face mask, which has:
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| KR102352034B1 (en) * | 2018-06-29 | 2022-01-14 | 코오롱인더스트리 주식회사 | Non-woven Fiber aggregates containing Lyocell Fibers |
| ES2964861T3 (en) | 2018-07-31 | 2024-04-09 | Chemiefaser Lenzing Ag | Non-woven fabric, use of non-woven fabric and cleaning wipe, drying wipe and mask containing non-woven fabric |
| JP7374405B2 (en) * | 2019-03-08 | 2023-11-07 | 大和紡績株式会社 | Non-woven fabric for liquid-impregnated skin covering sheets and liquid-impregnated skin covering sheets |
| KR20210116484A (en) * | 2019-03-29 | 2021-09-27 | 타피러스 컴퍼니 리미티드 | A liquid filter comprising a melt blown nonwoven fabric for a liquid filter, a laminate of the melt blown nonwoven fabric, and a laminate |
| EP3967180B1 (en) * | 2019-05-09 | 2023-05-03 | Asahi Kasei Kabushiki Kaisha | Nonwoven fabric and use thereof as a chemical impregnation sheet |
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