JP7228156B2 - Laminated continuous fiber nonwoven fabric with sustained liquid release - Google Patents
Laminated continuous fiber nonwoven fabric with sustained liquid release Download PDFInfo
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本発明は、含浸された液が徐々に放出する液徐放性積層長繊維不織布に関し、特にフェイスマスクやクレンジングシート等の基布として好適に用い得る液徐放性積層長繊維不織布に関するものである。 TECHNICAL FIELD The present invention relates to a liquid-releasing laminated long-fiber nonwoven fabric that gradually releases an impregnated liquid, and more particularly to a liquid-releasing laminated long-fiber nonwoven fabric that can be suitably used as a base fabric for face masks, cleansing sheets, and the like. .
従来より、クレンジングシート等の基布として不織布が用いられている。たとえば、特許文献１には、中間層が熱可塑性合成短繊維群で構成された短繊維不織布よりなり、両外層が親水性短繊維群で構成された三層構造不織布を清拭シートとして用いることが提案されている。そして、この清拭シートに清拭用液体を含浸させ、身体等を拭き取って清浄するのである。この清拭シートは、外層が親水性短繊維群で形成されているため、含浸させた清拭用液体が直ちに外層に移行し、速やかな拭き取りが可能となり、好ましいものである。しかしながら、クレンジングシート等の用途によっては、一回目の拭き取りによって、清拭用液体である化粧水の多くが消費されてしまい、二回目以降、特に三回目以降では化粧水による拭き取りができなくなるという問題があった。 Conventionally, nonwoven fabrics have been used as base fabrics for cleansing sheets and the like. For example, in Patent Document 1, a nonwoven fabric having a three-layer structure, in which the intermediate layer is made of a short fiber nonwoven fabric composed of a thermoplastic synthetic short fiber group and both outer layers are made of a hydrophilic short fiber group, is used as a cleaning sheet. is proposed. Then, the wiping sheet is impregnated with a wiping liquid, and the body or the like is wiped and cleaned. Since the outer layer of this wiping sheet is formed of a group of hydrophilic short fibers, the impregnated wiping liquid immediately migrates to the outer layer, enabling rapid wiping, which is preferable. However, depending on the use of the cleansing sheet, etc., the first wiping process consumes much of the lotion, which is the liquid for wiping, and the second and subsequent wiping, especially the third and subsequent wiping with the lotion becomes impossible. was there.
本発明の課題は、含浸された化粧水等の液体を直ちに放出させず、徐々に放出させうる不織布を提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a nonwoven fabric that can gradually release a liquid such as lotion impregnated therein instead of immediately releasing it.
本発明は、不織布の外層に特定の長繊維不織布を採用することにより、上記課題を解決したものである。すなわち、本発明は、疎水性捲縮複合長繊維群で構成され、該疎水性捲縮複合長繊維相互間が自己融着により結合している部位を含む長繊維不織布を外層とするか、又は疎水性伸縮性長繊維群で構成され、該疎水性伸縮性長繊維相互間は疎水性熱融着性長繊維の融着により結合している部位を含む長繊維不織布を外層とし、該長繊維不織布に交絡している親水性短繊維群で構成された内層とよりなる、目付３５～７０ｇ／ｍ2の積層長繊維不織布であって、前記積層長繊維不織布にその目付に対して６倍の化粧水を含浸させたとき、外層側からの化粧水全放出率は５０％未満であって、かつ、化粧水初期放出率は５０～７０％であることを特徴とする液徐放性積層長繊維不織布に関するものである。 The present invention solves the above problems by adopting a specific long-fiber nonwoven fabric for the outer layer of the nonwoven fabric. That is, in the present invention, the outer layer is a long-fiber nonwoven fabric comprising a group of hydrophobic crimped conjugate filaments, wherein the hydrophobic crimped conjugate filaments are bonded to each other by self-bonding, or A long-fiber nonwoven fabric composed of a group of hydrophobic stretchable long fibers, wherein the hydrophobic stretchable long fibers are bonded together by fusion bonding of the hydrophobic heat-sealable long fibers as an outer layer, and the long fibers A laminated long-fiber nonwoven fabric having a basis weight of 35 to 70 g/m 2 , comprising an inner layer composed of a group of hydrophilic staple fibers entangled with the nonwoven fabric, wherein the laminated long-fiber nonwoven fabric has a basis weight of 6 times the basis weight. When impregnated with lotion, the total lotion release rate from the outer layer side is less than 50%, and the lotion initial release rate is 50 to 70%. It relates to a fibrous nonwoven fabric.
［本発明の用語の説明］
本発明でいう液徐放性積層長繊維不織布の「外層」とは、液を付与する対象面に当接する層をいい、「内層」とはこの対象面に当接しない層をいう。したがって、液徐放性積層長繊維不織布が二層積層物であっても、外層と内層とが存在する。
本発明でいう「化粧水」とは、有効成分としてアルブチンを含み、その他の成分としてヒアルロン酸Ｎａ－２、加水分解ヒアルロン酸（ナノ化ヒアルロン酸）、ビタミンＣリン酸Ｍｇ、ビタミンＥ、ヨクイニンエキス（ハトムギエキス）、ＢＧ、濃グリセリン、ソルビット液、ＰＯＰメチルグルコシド、コハク酸２Ｎａ、コハク酸、ＶＰ－スチレン共重合体エマルション及びラウリン酸ＰＯＥ（２０）ソルビタン及びパラベンを含み、残部が水よりなるものである。具体的には、ロート製薬株式会社製の商品名「肌ラボ白潤薬用美白化粧水」のことである。
[Description of terms of the present invention]
In the present invention, the "outer layer" of the liquid sustained-release laminated filament nonwoven fabric refers to a layer that contacts the target surface to which the liquid is applied, and the "inner layer" refers to a layer that does not contact the target surface. Therefore, even if the liquid sustained-release laminated long-fiber nonwoven fabric is a two-layer laminate, it has an outer layer and an inner layer.
The "skin lotion" as used in the present invention contains arbutin as an active ingredient, and other ingredients such as hyaluronic acid Na-2, hydrolyzed hyaluronic acid (nanoized hyaluronic acid), vitamin C Mg phosphate, vitamin E, coix seed extract. (coix seed extract), BG, concentrated glycerin, sorbitol solution, POP methyl glucoside, disodium succinate, succinic acid, VP-styrene copolymer emulsion and POE laurate (20) sorbitan and paraben, the balance consisting of water is. Specifically, it is the trade name “Hada Labo Shirojun medicated whitening lotion” manufactured by Rohto Pharmaceutical Co., Ltd.
本発明でいう「外層側からの化粧水全放出率」及び「化粧水初期放出率」とは、以下の手順で測定及び算出されるものである。
（１）縦１００ｍｍ×横１５０ｍｍの積層長繊維不織布を準備する。
（２）内層を内側にして積層長繊維不織布を横方向に二つ折りし、縦１００ｍｍ×横７５ｍｍートの試験体を準備する。この試験体の表裏面は外層が露出している。
（３）試験体の重量を測定する。重量をｘｇとする。
（４）試験体に６ｘｇの化粧水を滴下し、含浸試験体を得る。この含浸試験体の重量は７ｘｇである。
（５）アクリル製下敷板の上に含浸試験体を置き、含浸試験体の上に同サイズの濾紙（アドバンテック Ｎｏ２）を二枚置き、さらに濾紙の上に同サイズのアクリル板を置く。
（６）アクリル板の上に、５００ｇの分銅を載せる。
（７）５秒静置後、分銅、アクリル板及び濾紙を取り除き、含浸試験体の重量を測定するこの重量をａｇとし、（７ｘ－ａ）ｇが一回目の液放出量となる。
（８）上記（７）の含浸試験体を用い、上記（５）～（７）を操作を行って、含浸試験体の重量を測定し、この重量をｂｇとする。（７ｘ－ｂ）ｇが二回目の液放出量となる。
（９）上記（８）の含浸試験体を用い、上記（５）～（７）を操作を行って、含浸試験体の重量を測定し、この重量をｃｇとする。（７ｘ－ｃ）ｇが三回目の液放出量となる。
（１０）以上の測定を行い、以下の式で算出される値が「外層側からの化粧水全放出率」及び「化粧水初期放出率」である。
外層側からの化粧水全放出率（％）＝［（７ｘ－ｃ）／６ｘ］×１００
化粧水初期放出率（％）＝［（７ｘ－ａ）／（７ｘ－ｃ）］×１００
The "lotion total release rate from the outer layer side" and the "lotion initial release rate" as used in the present invention are measured and calculated by the following procedures.
(1) A laminated filament nonwoven fabric having a size of 100 mm long and 150 mm wide is prepared.
(2) Laminated long-fiber nonwoven fabric is folded in two with the inner layer facing inward, and a test piece of 100 mm length×75 mm width is prepared. The outer layers are exposed on the front and back surfaces of this specimen.
(3) Measure the weight of the specimen. Let the weight be xg.
(4) Drop 6 x g of lotion onto the specimen to obtain an impregnated specimen. The weight of this impregnated specimen is 7×g.
(5) Place the impregnated specimen on an acrylic underlay plate, place two sheets of filter paper (Advantec No. 2) of the same size on the impregnated specimen, and then place an acrylic plate of the same size on top of the filter paper.
(6) Place a 500 g weight on the acrylic plate.
(7) After standing still for 5 seconds, remove the weight, the acrylic plate and the filter paper, and measure the weight of the impregnated specimen. This weight is ag, and (7x-a)g is the first liquid discharge amount.
(8) Using the impregnated specimen of (7) above, perform the operations (5) to (7) above, measure the weight of the impregnated specimen, and take this weight as bg. (7x-b) g is the second liquid discharge amount.
(9) Using the impregnated test piece of (8) above, perform the operations (5) to (7) above, measure the weight of the impregnated test piece, and take this weight as cg. (7x-c) g is the amount of the liquid discharged for the third time.
(10) After performing the above measurements, the values calculated by the following formulas are the "total lotion release rate from the outer layer side" and the "initial lotion release rate".
Total lotion release rate from outer layer side (%) = [(7x-c)/6x] x 100
Lotion initial release rate (%) = [(7x-a) / (7x-c)] x 100
本発明に係る液徐放性積層長繊維不織布の外層を構成する長繊維不織布としては、疎水性捲縮複合長繊維群で構成されたもの、又は疎水性伸縮性長繊維群で構成されたものが用いられる。まず、疎水性捲縮複合長繊維群で構成されたものについて説明する。疎水性捲縮複合長繊維としては、一般的には、ポリオレフィン、ポリエステル又はポリアミド等の疎水性合成樹脂を素材とする偏心芯鞘型複合繊維が用いられる。偏心芯鞘型複合繊維は、芯成分と鞘成分とで冷却時収縮率の異なる疎水性合成樹脂を用い、複合溶融紡糸した後に冷却すると、らせん状の捲縮が発現する。らせん状の捲縮はバネ状の伸縮性を示し、嵩高な長繊維不織布（たとえば、嵩密度が０．０１～０．０８ｇ／ｃｍ3程度の長繊維不織布）を与えるので、本発明で用いるのに好ましいものである。捲縮が発現した複合長繊維群をコンベア等の捕集体に捕集することにより、長繊維ウェブが形成される。そして、この長繊維ウェブを構成する複合長繊維群に部分的に加熱及び加圧を施すことにより、鞘成分を軟化又は溶融させて、複合長繊維相互間を自己融着させて、疎水性捲縮複合長繊維群で構成された長繊維不織布が得られる。なお、偏心芯鞘型複合繊維に代えて、疎水性合成樹脂を素材とする並列型（サイドバイサイド型）複合繊維を用いてもよい。並列型複合繊維の場合も、冷却時収縮率の異なる疎水性合成樹脂を、並列に複合溶融紡糸した後に冷却すると、捲縮が発現する。 The long-fiber nonwoven fabric constituting the outer layer of the liquid-releasing laminated long-fiber nonwoven fabric according to the present invention is composed of hydrophobic crimped conjugate long-fiber groups or hydrophobic stretchable long-fiber groups. is used. First, the one composed of a group of hydrophobic crimped conjugate filaments will be described. As the hydrophobic crimped conjugate long fibers, eccentric core-sheath conjugate fibers made of hydrophobic synthetic resin such as polyolefin, polyester or polyamide are generally used. The eccentric core-sheath type conjugate fiber uses hydrophobic synthetic resins with different contraction rates upon cooling for the core component and the sheath component, and develops helical crimps when cooled after being conjugated melt-spun. The helical crimp exhibits spring-like stretchability and gives a bulky long-fiber nonwoven fabric (for example, a long-fiber nonwoven fabric having a bulk density of about 0.01 to 0.08 g/cm 3 ), so it is used in the present invention. is preferred. A long-fiber web is formed by collecting the crimped composite long-fiber group on a collector such as a conveyor. Then, by partially applying heat and pressure to the conjugated filament group constituting the filament web, the sheath component is softened or melted, and the conjugated filaments are self-bonded to each other, resulting in a hydrophobic winding. A long fiber nonwoven fabric composed of a group of crimped conjugate long fibers is obtained. Instead of the eccentric core-sheath type conjugate fiber, a parallel type (side-by-side type) conjugate fiber made of a hydrophobic synthetic resin may be used. Also in the case of parallel-type conjugate fibers, when hydrophobic synthetic resins having different shrinkage rates upon cooling are subjected to conjugate melt-spinning in parallel and then cooled, crimps develop.
次に、疎水性伸縮性長繊維群で構成された長繊維不織布について説明する。疎水性伸縮性長繊維としては、疎水性ポリウレタン等の疎水性エラストマー樹脂を溶融紡糸することにより、得られる。かかる疎水性伸縮性長繊維は、素材である疎水性エラストマー樹脂が架橋している場合もあり、粘着性はあるが融着しにくい傾向がある。したがって、疎水性伸縮性長繊維群中に、エラストマー樹脂を素材としない合成樹脂よりなる疎水性熱融着性長繊維を混合しておく。疎水性伸縮性長繊維と疎水性熱融着性長繊維の混合割合は、質量比で、疎水性伸縮性長繊維：疎水性熱融着性長繊維＝１０～９０：９０～１０（％）であるのが好ましい。疎水性熱融着性長繊維の素材である合成樹脂としては、一般的には、ポリオレフィン、ポリエステル又はポリアミド等の疎水性合成樹脂が用いられる。疎水性伸縮性長繊維群で構成された長繊維不織布は、疎水性伸縮性長繊維群を溶融紡糸すると共に疎水性熱融着性長繊維群も溶融紡糸して、両者を混合した長繊維ウェブを形成する。そして、この長繊維ウェブに部分的に加熱及び加圧を施すことにより、疎水性熱融着性長繊維を軟化又は溶融させて、疎水性伸縮性長繊維相互間を融着させて、疎水性伸縮性長繊維群で構成された長繊維不織布が得られる。 Next, the long-fiber nonwoven fabric composed of hydrophobic stretchable long-fiber groups will be described. Hydrophobic stretchable long fibers are obtained by melt-spinning a hydrophobic elastomer resin such as hydrophobic polyurethane. Such hydrophobic stretchable long fibers may have a cross-linked hydrophobic elastomer resin as a raw material, and tend to be difficult to fuse although they are sticky. Therefore, hydrophobic heat-fusible long fibers made of synthetic resin not made of elastomer resin are mixed in the group of hydrophobic stretchable long fibers. The mixing ratio of the hydrophobic stretchable long fibers and the hydrophobic heat-fusible long fibers is, in mass ratio, hydrophobic stretchable long fibers:hydrophobic heat-fusible long fibers=10-90:90-10 (%). is preferred. Hydrophobic synthetic resins such as polyolefins, polyesters, and polyamides are generally used as the synthetic resins that are the material of the hydrophobic heat-fusible long fibers. A long-fiber nonwoven fabric composed of a group of hydrophobic stretchable long fibers is produced by melt-spinning the group of hydrophobic stretchable long-fibers and melt-spinning a group of hydrophobic heat-fusible long-fibers, and mixing the two together. to form Then, by partially applying heat and pressure to this long fiber web, the hydrophobic heat-fusible long fibers are softened or melted, and the hydrophobic stretchable long fibers are fused to each other, resulting in a hydrophobic A long-fiber nonwoven fabric composed of stretchable long-fiber groups is obtained.
上記した長繊維不織布に親水性短繊維群を交絡させて、長繊維不織布を外層とし親水性短繊維群を内層とする積層長繊維不織布とする。親水性短繊維としては、コットン繊維、レーヨン繊維又はリヨセル繊維等のセルロース系繊維を採用することができる。親水性短繊維群を長繊維不織布に交絡させるには、親水性短繊維群をカード法等で開繊集積してシート状にした短繊維ウェブを、長繊維不織布上に積層した後、高圧水流処理を施せばよい。 A group of hydrophilic short fibers is entangled with the above-described nonwoven fabric of long fibers to form a laminated nonwoven fabric of long fibers having the nonwoven fabric of long fibers as an outer layer and the group of hydrophilic short fibers as an inner layer. Cellulosic fibers such as cotton fibers, rayon fibers, and lyocell fibers can be used as the hydrophilic short fibers. In order to entangle the hydrophilic short fiber group with the long fiber nonwoven fabric, the hydrophilic short fiber group is opened and accumulated by a card method or the like, and the short fiber web formed into a sheet is laminated on the long fiber nonwoven fabric, and then subjected to high pressure water jet. It should be processed.
長繊維不織布の目付は１０～２０ｇ／ｍ2程度であるのが好ましい。また、内層となる親水性短繊維群の目付は１５～３０ｇ／ｍ2程度であるのが好ましい。したがって、積層長繊維不織布の目付は、二層積層物の場合は２５～５０ｇ／ｍ2程度であるのが好ましく、三層構造物の場合は４０～８０ｇ／ｍ2程度であるのが好ましい。積層長繊維不織布の目付が高すぎると、高価になると共に嵩高になり、商品価値が低下する傾向となる。また、積層長繊維不織布の目付が低すぎると、化粧水含浸量の絶対値が低下し、商品価値が低下する傾向となる。なお、積層長繊維不織布の嵩密度は、０．０７～０．１５ｇ／ｃｍ3程度である。 The basis weight of the long-fiber nonwoven fabric is preferably about 10 to 20 g/m 2 . Moreover, the basis weight of the hydrophilic short fiber group forming the inner layer is preferably about 15 to 30 g/m 2 . Therefore, the basis weight of the laminated long-fiber nonwoven fabric is preferably about 25 to 50 g/m 2 for the two-layer laminate, and about 40 to 80 g/m 2 for the three-layer structure. If the basis weight of the laminated long-fiber nonwoven fabric is too high, it becomes expensive and bulky, which tends to reduce its commercial value. On the other hand, when the basis weight of the laminated long-fiber nonwoven fabric is too low, the absolute value of the lotion impregnated amount tends to decrease and the commercial value tends to decrease. The bulk density of the laminated long-fiber nonwoven fabric is approximately 0.07 to 0.15 g/cm 3 .
積層長繊維不織布の外層を構成している長繊維不織布の目付、疎水性捲縮複合長繊維の捲縮数、疎水性伸縮性長繊維の伸縮力、融着部位の面積や個数及び親水性短繊維群の目付等を調整する。そして、外層側からの化粧水全放出率を５０％未満、より好ましくは３０～５０％とし、化粧水初期放出率を５０～７０％とすることにより、本発明に係る液徐放性積層長繊維不織布が得られる。化粧水全放出率が５０％を超えると、四回目以降の拭き取り時において、化粧水を対象面に付与しにくくなる。また、化粧水初期放出率が５０％未満であると、一回目の拭き取り時に化粧水を十分に対象面に付与しにくくなる。逆に、化粧水初期放出率が７０％を超えると、一回目の拭き取り時に化粧水が付与され過ぎて、その後の拭き取り時に化粧水を対象面に付与しにくくなる。 The basis weight of the long-fiber nonwoven fabric constituting the outer layer of the laminated long-fiber nonwoven fabric, the number of crimps of the hydrophobic crimped composite long fibers, the stretching force of the hydrophobic elastic long fibers, the area and number of fused parts, and the hydrophilic shortness Adjust the basis weight of the fiber group. By setting the total lotion release rate from the outer layer side to less than 50%, more preferably 30 to 50%, and the initial lotion release rate to 50 to 70%, the liquid sustained release laminate length according to the present invention A fibrous nonwoven is obtained. When the total lotion release rate exceeds 50%, it becomes difficult to apply the lotion to the target surface during the fourth and subsequent wipings. Further, when the initial release rate of lotion is less than 50%, it becomes difficult to sufficiently apply lotion to the target surface during the first wiping. Conversely, if the initial release rate of lotion exceeds 70%, too much lotion will be applied during the first wiping, making it difficult to apply the lotion to the target surface during subsequent wiping.
本発明において、液徐放性積層長繊維不織布に所望に応じて又は用途に応じて種々の後加工を施してもよい。たとえば、凹凸ロールを用いて賦型加工を施し伸縮性を付与してもよい。本発明に係る液徐放性積層長繊維不織布は、フェイスマスク、クレンジングシート又は制汗シート等の化粧シートの基布、生理用ナプキン、使い捨ておむつ等の衛生用品の素材並びに手拭きやお尻拭き等の拭き布の基布等として好適に用いられる。 In the present invention, the liquid-releasing laminated long-fiber nonwoven fabric may be subjected to various post-processing as desired or in accordance with the application. For example, stretchability may be imparted by applying a shaping process using uneven rolls. The liquid sustained release laminated filament nonwoven fabric according to the present invention is used as a base fabric for cosmetic sheets such as face masks, cleansing sheets or antiperspirant sheets, as a material for sanitary products such as sanitary napkins and disposable diapers, as well as hand wipes and bottom wipes. It is suitably used as a base cloth for wiping cloth.
本発明に係る液徐放性積層長繊維不織布は、対象面に当接する外層の長繊維不織布が疎水性捲縮複合長繊維群又は疎水性伸縮性長繊維群で構成されているため、化粧水を吸収保持しにくいが、ポンプ機能を有するものである。一方、内層の親水性短繊維群は化粧水をよく吸収保持するものである。したがって、親水性短繊維群に吸収保持されている化粧水が、外層のポンプ機能により徐々に放出されて対象面に付与されるという効果を奏する。また、長繊維不織布を具備しているため、短繊維のみで構成されているものに比べて、機械的強度に優れている。 In the liquid sustained-release laminated filament nonwoven fabric according to the present invention, the outer layer filament nonwoven fabric in contact with the target surface is composed of a hydrophobic crimped composite filament group or a hydrophobic stretchable filament group. Although it is difficult to absorb and hold , it has a pump function. On the other hand, the hydrophilic short fiber group in the inner layer absorbs and retains lotion well. Therefore, there is an effect that the lotion absorbed and held by the hydrophilic short fiber group is gradually released by the pumping function of the outer layer and applied to the target surface. In addition, since the long fiber nonwoven fabric is provided, the mechanical strength is superior to that of the one composed only of short fibers.
実施例１
［疎水性捲縮複合長繊維群で構成され長繊維不織布の準備］
長繊維不織布として、三井化学株式会社製の嵩高スパンボンド不織布（目付１６ｇ／ｍ2、エンボス面積率１０％、嵩密度０．０７ｇ／ｃｍ3、縦方向の引張強度１９Ｎ／５ｃｍ、横方向の引張強度９Ｎ／５ｃｍ、縦方向の破断伸度６０％、横方向の破断伸度８０％）を準備した。この長繊維不織布を構成する長繊維は、芯成分がポリプロピレン重合体で鞘成分がプロピレン・エチレンランダム共重合体よりなる偏心芯鞘型複合長繊維であって、潜在捲縮が発現したらせん状捲縮複合長繊維である。捲縮複合長繊維の繊度は２．５デシテックスで捲縮数は２３個／２５ｍｍである。捲縮複合長繊維相互間は、エンボス部において、鞘成分により自己融着しているものである。
Example 1
[Preparation of long-fiber nonwoven fabric composed of hydrophobic crimped conjugate long-fiber group]
As the long-fiber nonwoven fabric, a bulky spunbond nonwoven fabric manufactured by Mitsui Chemicals, Inc. (weight per unit area: 16 g/m 2 , embossed area ratio: 10%, bulk density: 0.07 g/cm 3 , tensile strength in the longitudinal direction: 19 N/5 cm, tensile strength in the transverse direction: A strength of 9 N/5 cm, a longitudinal breaking elongation of 60%, and a transverse breaking elongation of 80%) were prepared. The long fibers constituting the long-fiber nonwoven fabric are eccentric core-sheath type composite long fibers having a core component made of polypropylene polymer and a sheath component made of propylene/ethylene random copolymer, and are helically wound with latent crimp. It is a crimped composite long fiber. The fineness of the crimped conjugate long fibers is 2.5 decitex, and the number of crimps is 23/25 mm. The crimped conjugate long fibers are self-fused by the sheath component at the embossed portion.
［液徐放性積層長繊維不織布の製造］
平均繊維長２５ｍｍの木綿繊維群を、パラレルカード機で開繊及び集積させて、目付２４ｇ／ｍ2の短繊維ウェブを得た。９０メッシュのプラスチック製織物からなるメッシュ状支持体よりなるコンベア上に長繊維不織布を載置し、さらに長繊維不織布上に短繊維ウェブを載置した。そして、ノズル孔径０．１ｍｍの噴出孔が孔間隔０．６ｍｍで横一列に配置された噴出装置を用い、短繊維ウェブ側に高圧水流を施した。噴出圧は、２ＭＰａの噴出圧力で１回予備処理した後、３ＭＰa で１回処理、４ＭＰａの噴出圧力で２回処理した。この処理により、木綿繊維群を長繊維不織布と交絡させた後、１２０℃で乾燥して、外層が長繊維不織布で内層が短繊維群よりなる、目付４０ｇ／ｍ2の液徐放性積層長繊維不織布を得た。
[Manufacturing of liquid sustained-release laminated filament nonwoven fabric]
A cotton fiber group having an average fiber length of 25 mm was opened and collected by a parallel carding machine to obtain a staple fiber web having a basis weight of 24 g/m 2 . A long-fiber nonwoven fabric was placed on a conveyor consisting of a mesh support made of 90-mesh plastic fabric, and a short-fiber web was further placed on the long-fiber nonwoven fabric. Then, a high-pressure water jet was applied to the side of the short fiber web using a jetting device in which jetting holes with a nozzle hole diameter of 0.1 mm were arranged in a row at intervals of 0.6 mm. As for the jetting pressure, the sample was pretreated once at a jetting pressure of 2 MPa, then once at a jetting pressure of 3 MPa, and twice at a jetting pressure of 4 MPa. By this treatment, the cotton fiber group is entangled with the long fiber nonwoven fabric, and then dried at 120 ° C. The outer layer is a long fiber nonwoven fabric and the inner layer is a short fiber group. A fibrous nonwoven fabric was obtained.
実施例２
［疎水性捲縮複合長繊維群で構成され長繊維不織布の準備］
長繊維不織布として、三井化学株式会社製の嵩高スパンボンド不織布［目付２０ｇ／ｍ2、エンボス面積率１０％、嵩密度０．０６ｇ／ｃｍ3、縦方向の引張強度２４Ｎ／５ｃｍ、横方向の引張強度１１Ｎ／５ｃｍ、縦方向の破断伸度６０％、横方向の破断伸度６５％］を準備した。この長繊維不織布を構成している長繊維は、実施例１と同様のものであり、エンボス部において同様に自己融着しているものである。
Example 2
[Preparation of long-fiber nonwoven fabric composed of hydrophobic crimped conjugate long-fiber group]
As the long-fiber nonwoven fabric, a bulky spunbond nonwoven fabric manufactured by Mitsui Chemicals, Inc. [basis weight: 20 g/m 2 , embossed area ratio: 10%, bulk density: 0.06 g/cm 3 , tensile strength in the longitudinal direction: 24 N/5 cm, tensile strength in the transverse direction: strength of 11 N/5 cm, longitudinal breaking elongation of 60%, transverse breaking elongation of 65%]. The long fibers constituting this long-fiber nonwoven fabric are the same as those in Example 1, and are similarly self-fused at the embossed portions.
［液徐放性積層長繊維不織布の製造］
短繊維ウェブの目付を２０ｇ／ｍ2に変更した他は、実施例１と同様にして交絡処理し、目付４０ｇ／ｍ2の液徐放性積層長繊維不織布を得た。
[Manufacturing of liquid sustained-release laminated filament nonwoven fabric]
The entangling treatment was carried out in the same manner as in Example 1, except that the basis weight of the short fiber web was changed to 20 g/m 2 , to obtain a liquid sustained release laminated filament nonwoven fabric with a basis weight of 40 g/m 2 .
実施例３
［疎水性伸縮性長繊維群及び疎水性熱融着性長繊維群で構成され長繊維不織布の準備］
長繊維不織布として、三井化学株式会社製の混繊スパンボンド不織布（目付３０ｇ／ｍ2、エンボス面積率１８％、嵩密度０．０９ｇ／ｃｍ3、縦方向の引張強度２１Ｎ／５ｃｍ、横方向の引張強度１０Ｎ／５ｃｍ、縦方向の破断伸度１７０％、横方向の破断伸度１７０％）を準備した。この長繊維不織布は、疎水性ポリウレタン長繊維４７質量部とポリプロピレン長繊維５３質量部で構成されている。各長繊維相互間は、エンボス部において、ポリプロピレン長繊維によって融着され結合されている。
Example 3
[Preparation of long-fiber nonwoven fabric composed of hydrophobic stretchable long-fiber group and hydrophobic heat-fusible long-fiber group]
As the long-fiber nonwoven fabric, a mixed fiber spunbond nonwoven fabric manufactured by Mitsui Chemicals, Inc. (basis weight: 30 g/m 2 , embossed area ratio: 18%, bulk density: 0.09 g/cm 3 , tensile strength in the longitudinal direction: 21 N/5 cm, tensile strength in the transverse direction: A tensile strength of 10 N/5 cm, a longitudinal breaking elongation of 170%, and a transverse breaking elongation of 170%) were prepared. This long-fiber nonwoven fabric is composed of 47 parts by mass of hydrophobic polyurethane long fibers and 53 parts by mass of polypropylene long fibers. The long fibers are fused and bonded by polypropylene long fibers at the embossed portions.
［液徐放性積層長繊維不織布の製造］
短繊維ウェブの目付を１７ｇ／ｍ2に変更した他は、実施例１と同様にして交絡処理し、目付４７ｇ／ｍ2の液徐放性積層長繊維不織布を得た。
[Manufacturing of liquid sustained-release laminated filament nonwoven fabric]
The entangling treatment was carried out in the same manner as in Example 1, except that the basis weight of the short fiber web was changed to 17 g/m 2 , to obtain a liquid sustained release laminated filament nonwoven fabric with a basis weight of 47 g/m 2 .
実施例４
実施例３で得られた液徐放性積層長繊維不織布を、一対の凹凸ロール間に通して賦型加工を行った。凹凸ロールは、周方向に山部と谷部が走行しているものであり、山間のピッチが２．５ｍｍである。そして、一対の凹凸ロールは、一方の凹凸ロールの山部が他方の凹凸ロールの谷部と噛み合い、噛み合い深さが２．２ｍｍとなるように設置されてなるものである。この賦型加工を施した液徐放性積層長繊維不織布は、幅方向に良好な伸縮性を持つものであった。
Example 4
The sustained liquid-releasing laminated filament nonwoven fabric obtained in Example 3 was passed between a pair of uneven rolls for shaping. The uneven roll has crests and troughs running in the circumferential direction, and the pitch between the crests is 2.5 mm. The pair of uneven rolls are installed so that the peaks of one uneven roll mesh with the valleys of the other uneven roll, and the meshing depth is 2.2 mm. The liquid sustained-release laminated long-fiber nonwoven fabric subjected to this shaping process had good stretchability in the width direction.
実施例１～４で得られた液徐放性積層長繊維不織布を、本明細書の段落０００７に記載の方法で、化粧水全放出率及び化粧水初期放出率を求めたところ、表１に示すとおりであった。
［表１］
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
化粧水全放出率（％） 化粧水初期放出率（％）
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
実施例１ ３１．２ ５９．４
実施例２ ３３．０ ５９．２
実施例３ ４５．２ ６５．６
実施例４ ４４．４ ５２．８
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
The liquid sustained release laminated long fiber nonwoven fabrics obtained in Examples 1 to 4 were measured for the total lotion release rate and the initial lotion release rate by the method described in paragraph 0007 of this specification, and the results are shown in Table 1. It was as shown.
[Table 1]
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Lotion total release rate (%) Lotion initial release rate (%)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Example 1 31.2 59.4
Example 2 33.0 59.2
Example 3 45.2 65.6
Example 4 44.4 52.8
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
表１に示したように、実施例１～４で得られた液徐放性積層長繊維不織布は、含浸された化粧水が押圧により徐々に放出され、化粧シートの基布等として好適に用いうるものであった。 As shown in Table 1, the liquid-releasing laminated long-fiber nonwoven fabrics obtained in Examples 1 to 4 gradually release the impregnated lotion when pressed, and are suitable for use as a base fabric for a decorative sheet or the like. It was worth it.
Claims (3)
前記積層長繊維不織布にその目付に対して６倍の化粧水を含浸させたとき、外層側からの化粧水全放出率は５０％未満であって、かつ、化粧水初期放出率は５０～７０％であることを特徴とする液徐放性積層長繊維不織布。 A long-fiber nonwoven fabric composed of a group of hydrophobic stretchable long fibers, wherein the hydrophobic stretchable long fibers are bonded together by fusion bonding of the hydrophobic heat-sealable long fibers as an outer layer, and the long fibers A laminated long-fiber nonwoven fabric having a basis weight of 25 to 80 g/m 2 , comprising an inner layer composed of a group of hydrophilic staple fibers entangled with the nonwoven fabric,
When the laminated long-fiber nonwoven fabric is impregnated with lotion in an amount six times its basis weight, the total lotion release rate from the outer layer side is less than 50%, and the initial lotion release rate is 50 to 70%. %.
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| JP2023057092A (en) | 2023-04-20 |
| JP7469781B2 (en) | 2024-04-17 |
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