JP2017128107A - Cleaning sheet - Google Patents
Cleaning sheet Download PDFInfo
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- JP2017128107A JP2017128107A JP2016117288A JP2016117288A JP2017128107A JP 2017128107 A JP2017128107 A JP 2017128107A JP 2016117288 A JP2016117288 A JP 2016117288A JP 2016117288 A JP2016117288 A JP 2016117288A JP 2017128107 A JP2017128107 A JP 2017128107A
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- 238000004140 cleaning Methods 0.000 title abstract 6
- 239000000835 fiber Substances 0.000 claims abstract description 156
- 239000007788 liquid Substances 0.000 claims abstract description 98
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 28
- 229920002994 synthetic fiber Polymers 0.000 claims abstract description 18
- 239000012209 synthetic fiber Substances 0.000 claims abstract description 18
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 18
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 16
- 229920003043 Cellulose fiber Polymers 0.000 claims abstract description 14
- 230000003578 releasing effect Effects 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 42
- 229920000742 Cotton Polymers 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 20
- 238000010521 absorption reaction Methods 0.000 claims description 15
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 229920000728 polyester Polymers 0.000 claims description 6
- 239000004627 regenerated cellulose Substances 0.000 claims description 5
- 229920000098 polyolefin Polymers 0.000 claims description 4
- 239000010410 layer Substances 0.000 abstract description 137
- 239000004744 fabric Substances 0.000 abstract description 3
- 239000011229 interlayer Substances 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 description 17
- 230000000717 retained effect Effects 0.000 description 13
- 239000000470 constituent Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 9
- 229920000433 Lyocell Polymers 0.000 description 8
- 239000006210 lotion Substances 0.000 description 7
- 238000011156 evaluation Methods 0.000 description 6
- -1 polyethylene Polymers 0.000 description 6
- 239000002131 composite material Substances 0.000 description 5
- 241000219146 Gossypium Species 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 4
- 229920000297 Rayon Polymers 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 239000002964 rayon Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000006748 scratching Methods 0.000 description 2
- 230000002393 scratching effect Effects 0.000 description 2
- 230000002087 whitening effect Effects 0.000 description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 240000000047 Gossypium barbadense Species 0.000 description 1
- 235000009429 Gossypium barbadense Nutrition 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
本発明は、各種の液体を含ませた後、押圧することにより、含ませた液体を放出させながら清拭する清拭シートに関する。 The present invention relates to a wiping sheet that contains various liquids and then is wiped while being released by pressing the liquids.
対人あるいは対物向けの清拭シートとして、構成繊維同士が三次元交絡することによって一体化してなるスパンレース不織布は、風合いが良く、拭き取り対象物に対してキズ等を付ける恐れがないため、各種の拭き取り用途に好適に使用されている。 As a wiping sheet for interpersonal or objective purposes, the spunlace nonwoven fabric that is integrated by three-dimensional entanglement of the constituent fibers has a good texture and there is no risk of scratching the object to be wiped. It is suitably used for wiping applications.
清拭する際には、ドライの状態で使用するものや、各種液体を含ませて使用するものがある。液体を含ませて使用するもののうち、液体が単なる水ではなく、機能性を有する液体の場合は、清拭シート自体が液体を十分に染み込む機能を必要とされるが、拭き取りの際に、染み込ませた液体を効果的に拭き取り対象物に移行することが求められる。効果的に液体を放出し移行させなければ、機能性を有する液体の効果が十分に発揮できないからである。液体を染み込ませて湿潤状態で使用する清拭シートとしては、各種の繊維を所定量混合したものや、積層したものが開示されている（特許文献１〜３）。 When wiping, there are ones that are used in a dry state and ones that are used by including various liquids. Of the liquids that are used, if the liquid is not mere water but a functional liquid, the wiping sheet itself needs to have a function of sufficiently soaking the liquid. It is required to effectively wipe the liquid so that it is transferred to the object. This is because the effect of the liquid having functionality cannot be sufficiently exhibited unless the liquid is effectively discharged and transferred. As a wiping sheet which is soaked with a liquid and used in a wet state, a mixture of a predetermined amount of various fibers or a laminate thereof are disclosed (Patent Documents 1 to 3).
本発明の課題は、清拭シートとしての使用感を持ちながら、含ませた液体を効率よく放出し、被清拭物に移行しながら、効果的に清拭しうる清拭シートを提供することにある。 An object of the present invention is to provide a wiping sheet that can be effectively wiped while efficiently discharging the contained liquid while having a feeling of use as a wiping sheet and shifting to an object to be wiped. It is in.
本発明は、上記課題を達成するものであって、中間層と、中間層の両面に位置する外層とから構成される３層構造不織布によって構成される清拭シートであり、
中間層を構成する繊維は、熱可塑性合成繊維のみからなり、
外層を構成する繊維には、少なくともセルロース系繊維が含まれており、
両面に位置する外層と中間層とは、層間において、少なくとも外層を構成する繊維が、中間層を構成する繊維に絡みつくことによって層間が一体化しており、
清拭シートは、３層構造不織布の質量（１００質量部）に対して４００質量部以上の液体を含んでおり、液体放出性が５０質量％以上であることを特徴とする清拭シートを特徴とする清拭シートを要旨とする。
This invention achieves the said subject, Comprising: It is the wiping sheet comprised by the three-layer structure nonwoven fabric comprised from an intermediate | middle layer and the outer layer located in both surfaces of an intermediate | middle layer,
The fibers constituting the intermediate layer consist only of thermoplastic synthetic fibers,
The fibers constituting the outer layer include at least cellulosic fibers,
Between the outer layer and the intermediate layer located on both sides, at least the fibers constituting the outer layer are entangled with the fibers constituting the intermediate layer, and the layers are integrated.
The wiping sheet contains 400 parts by mass or more of liquid with respect to the mass (100 parts by mass) of the three-layered nonwoven fabric, and has a liquid releasing property of 50% by mass or more. The gist of the wiping sheet is as follows.
以下、本発明を詳細に説明する。 Hereinafter, the present invention will be described in detail.
本発明の清拭シートは、中間層と、その中間層の両面に位置する２つの外層との３層構造不織布によって構成される。外層は、清拭の際に、清拭対象物と直に接する層であり、清拭性を発揮する清拭層である。一方、外層に挟まれてなる中間層は、清拭の際に染み込ませる液体を保持する層であり、保水性を発揮する保水層（あるいは保液層）でもあり、クッション性も発揮する層でもある。そして、中間層の両面に位置する外層が、中間層が保持してなる水分を外層よりも外部に染み出ないように、中間層を挟み込むことによって閉じ込める役割を担い、清拭の際に、清拭シート面に押圧する力が加わると、押圧により中間層の空隙が押し潰されて、中間層内の空隙に保有していた水分や液体が、外層側に移動して外層に保持しきれない液体は外部に効率的に染み出し、今まで中間層にて保持していた液体や水分を効果的に外層よりも外部へ放出する。 The wiping sheet of the present invention is composed of a three-layered nonwoven fabric composed of an intermediate layer and two outer layers located on both sides of the intermediate layer. The outer layer is a layer that is in direct contact with the object to be wiped during wiping, and is a wiping layer that exhibits wiping properties. On the other hand, the intermediate layer sandwiched between the outer layers is a layer that retains the liquid soaked during wiping, and is also a water retaining layer (or liquid retaining layer) that exhibits water retention, and a layer that also exhibits cushioning properties. is there. The outer layers located on both sides of the intermediate layer serve to confine the intermediate layer by sandwiching the intermediate layer so that the moisture retained by the intermediate layer does not ooze out to the outside of the outer layer. When a pressing force is applied to the surface of the wiping sheet, the gap in the intermediate layer is crushed by the press, and the moisture and liquid held in the gap in the intermediate layer cannot move to the outer layer side and be held in the outer layer. The liquid effectively oozes out to the outside, and effectively discharges the liquid and moisture held in the intermediate layer until now to the outside rather than the outer layer.
中間層は、熱可塑性合成繊維のみによって構成され、熱可塑性合成繊維としては、その重合体の性質上、疎水性に優れるポリオレフィン系繊維であることが好ましい。中間層は、中間層内の空隙に水分や液体を保持する役割を担うものでありながら、また、押圧により、保持している水分や液体を中間層外に容易に放出する役割も担うことを要する。ここで、中間層を構成する繊維自体が、吸水性を有する繊維であると、繊維自体が水分や液体を吸水により保持してしまい、また、保持した水分や液体を容易に放出することができない。したがって、本発明の中間層は、一般的に吸水性を有しないとされる熱可塑性合成繊維のみによって構成させることにより、繊維自体が吸水するのではなく、効果的に、繊維間の空隙で水分や液体を保持し、必要の際に容易に中間層の外へ放出し、外層を通じて、シート外へ移行することができるのである。 An intermediate | middle layer is comprised only with a thermoplastic synthetic fiber, and it is preferable that it is a polyolefin-type fiber excellent in hydrophobicity as a thermoplastic synthetic fiber from the property of the polymer. While the intermediate layer plays a role of retaining moisture and liquid in the voids in the intermediate layer, it also plays a role of easily releasing the retained moisture and liquid to the outside of the intermediate layer by pressing. Cost. Here, if the fiber itself constituting the intermediate layer is a fiber having water absorption, the fiber itself retains moisture and liquid by absorbing water, and the retained moisture and liquid cannot be easily released. . Therefore, the intermediate layer of the present invention is constituted by only the thermoplastic synthetic fiber which is generally considered to have no water absorption, so that the fiber itself does not absorb water, and effectively, moisture in the voids between the fibers. The liquid can be retained, and can be easily discharged out of the intermediate layer when necessary, and can be transferred out of the sheet through the outer layer.
熱可塑性合成繊維のみによって構成される中間層は、構成繊維同士が繊維の交点で、熱可塑性合成繊維を構成する熱可塑性重合体の一部が溶融固化することによって接着している不織布を用いることが好ましい。特に、機械捲縮を有する熱可塑性合成短繊維が多数堆積してなる短繊維ウェブに、エアスルー法やサーマルボンド法により、構成繊維の一部を溶融させて、繊維交点で熱接着してなる不織布を用いることが好ましい。さらには、融点の異なる２種の重合体からなり、低融点重合体が鞘部に、高融点重合体が芯部に配されてなる芯鞘型複合繊維によって構成され、鞘部の低融点重合体が溶融固化することによって、構成繊維同士が熱接着してなる短繊維不織布を用いることが好ましい。芯鞘型複合繊維としては、芯部にポリエステルが配され、鞘部にポリエチレンが配された複合繊維や、芯部にポリプロピレン、鞘部にポリエチレンが配された複合繊維を好ましく用いることができる。これらはいずれも、繊維表面にポリオレフィンが配されることにより、疎水性であり、上記した中間層の役割を効果的に発揮することができる。 For the intermediate layer composed only of thermoplastic synthetic fibers, use non-woven fabrics that are bonded by melting and solidifying a part of the thermoplastic polymer constituting the thermoplastic synthetic fibers at the intersection of the constituent fibers with each other. Is preferred. In particular, a nonwoven fabric in which a part of the constituent fibers is melted and thermally bonded at a fiber intersection by an air-through method or a thermal bond method on a short fiber web in which a large number of thermoplastic synthetic staple fibers having mechanical crimps are deposited. Is preferably used. Furthermore, it is composed of two types of polymers having different melting points, and is composed of a core-sheath type composite fiber in which a low melting point polymer is arranged in the sheath part and a high melting point polymer is arranged in the core part. It is preferable to use a short fiber nonwoven fabric in which the constituent fibers are thermally bonded to each other by melting and solidifying the coalescence. As the core-sheath type composite fiber, a composite fiber in which polyester is disposed in the core part and polyethylene is disposed in the sheath part, or a composite fiber in which polypropylene is disposed in the core part and polyethylene is disposed in the sheath part can be preferably used. All of these are hydrophobic because polyolefin is arranged on the fiber surface, and can effectively exert the role of the intermediate layer described above.
中間層を構成する繊維は、上記したように捲縮を有する短繊維であって、その単繊維繊度は、使用目的により適宜選択すればよく、例えば、１．４５〜９ｄｔｅｘの範囲のものが使用できる。単繊維繊度が大きくなるとコシ感が向上しゴワゴワした触り心地となるため、汚れをゴシゴシと力を入れて拭い取る用途に適しており、３．５〜９ｄｔｅｘを選択するとよい。一方、単繊維繊度が小さくなるとしなやかで柔らかい風合いなる傾向となり、女性や赤ちゃんの肌等のデリケートな用途に適しており、１．４５〜３．３ｄｔｅｘの範囲を選択するとよい。 The fibers constituting the intermediate layer are short fibers having crimps as described above, and the single fiber fineness may be appropriately selected depending on the purpose of use. For example, fibers in the range of 1.45 to 9 dtex are used. it can. When the single fiber fineness is increased, the feeling of firmness is improved and the touch becomes harsh. Therefore, it is suitable for the purpose of wiping dirt with a force, and it is preferable to select 3.5 to 9 dtex. On the other hand, when the monofilament fineness becomes small, it tends to have a soft and soft texture, which is suitable for delicate applications such as the skin of women and babies, and a range of 1.45 to 3.3 dtex may be selected.
中間層は、ＪＩＳ Ｌ １９０７ バイレック法による吸水性が２０ｍｍ以下であるとよい。熱可塑性合成繊維であるポリエステル繊維やポリエチレン繊維、ポリピレン繊維は、繊維自体が吸水することがないため、これらの繊維によって構成される不織布を用いてバイレック法による吸水性を測定しても略ゼロｍｍ付近であり、中間層（不織布）を構成する繊維間空隙による毛細官現象や繊維配列の影響によって若干数ｍｍ程度吸い上げることもあるが、２０ｍｍを超えることはない。本発明においては、上記したように、中間層を構成する繊維自体には吸水性がなく、また吸水性がなく疎水性の繊維によって構成されているため、中間層を構成する不織布自体は吸水性を有するものではないが、繊維自体が吸水するのではなく、繊維間の空隙に保液あるいは保水し、必要な際に放出することができる。このように、吸水性に乏しい中間層が、押圧による力が加わるまでの間に、良好に液体や水分を保持できるのは、中間層の両面を、吸水性を有する外層で挟みこむ構造を採用するからである。 The intermediate layer preferably has a water absorption of 20 mm or less according to the JIS L 1907 birec method. Polyester fibers, polyethylene fibers, and polypyrene fibers, which are thermoplastic synthetic fibers, do not absorb water, so even if the water absorption by the birec method is measured using a non-woven fabric composed of these fibers, it is substantially zero mm. Although it is near and may be sucked up about several millimeters by the influence of the capillary phenomenon and the fiber arrangement due to the inter-fiber gap constituting the intermediate layer (nonwoven fabric), it does not exceed 20 mm. In the present invention, as described above, since the fibers constituting the intermediate layer have no water absorption and are constituted by hydrophobic fibers without water absorption, the nonwoven fabric itself constituting the intermediate layer is water absorbent. However, the fibers themselves do not absorb water, but can be retained or retained in the gaps between the fibers and released when necessary. In this way, the intermediate layer with poor water absorption can hold the liquid and moisture well until the force due to pressing is applied, adopting a structure in which both sides of the intermediate layer are sandwiched between outer layers having water absorption Because it does.
次いで、中間層の両面に位置する外層について説明する。外層を構成する繊維には、少なくともセルロース系繊維が含まれる。セルロース系繊維は、繊維自体が吸水性を有するため、外層に一定の吸水性を付与することができ、中間層よりも吸水性に優れる。そして、外層は一定の吸水性を有することから、中間層内に保持してなる液体や水分を挟み込んで、３層構造不織布の質量に対して少なくとも４００質量部の液体を清拭シート中に保持することができる。 Next, the outer layer located on both sides of the intermediate layer will be described. The fibers constituting the outer layer include at least cellulosic fibers. Since the fiber itself has water absorption, the cellulosic fiber can impart constant water absorption to the outer layer and is more excellent in water absorption than the intermediate layer. And since an outer layer has fixed water absorption, the liquid and water which are hold | maintained in an intermediate | middle layer are inserted | pinched, and at least 400 mass parts liquid is hold | maintained in a wiping sheet with respect to the mass of a three-layer structure nonwoven fabric. can do.
セルロース系繊維としては、天然繊維であるコットン繊維、レーヨン，キュプラ等の再生セルロース繊維、リヨセル繊維（商品名「テンセル」）等の精製セルロース繊維が挙げられる。 Examples of the cellulosic fibers include natural fibers such as cotton fibers, regenerated cellulose fibers such as rayon and cupra, and purified cellulose fibers such as lyocell fibers (trade name “Tencel”).
コットン繊維としては、精練・漂白された晒し綿を使用するのが好ましく、一部特殊な処方として、コットン繊維が元々含んでいる油分を残しつつ漂白を行ったコットン繊維も使用できる。繊度に関しては産地・品種によって異なるが、意識してデシ綿と呼ばれる極太綿や、スピマ・エジプト綿といった極細綿の品種を選択しなければ、特に問題なく使用できる。 As the cotton fiber, it is preferable to use a scoured and bleached bleached cotton. As a special prescription, a cotton fiber bleached while leaving the oil originally contained in the cotton fiber can also be used. Although the fineness varies depending on the production area and variety, it can be used without any problem unless an extremely thick cotton called desi cotton or a very fine cotton variety such as spima and Egyptian cotton is selected.
外層として、セルロース系繊維として、コットン繊維を用いる場合は、コットン繊維のみによって構成されるものであってもよいが、多くとも５０質量％とし、他の繊維と混合して用いることが好ましい。コットン繊維はルーメンと呼ばれる中空構造になっており、この中空部にも液体や水分を取り込むことができるため、コットン繊維自体の吸水性は高い。しかしながら、この中空部に、液体や水分が一旦抱き込まれると、容易に放出されない。したがって、液体や水分の放出性という本発明の目的を考慮すると、セルロース系繊維としてコットン繊維を用いる場合は、外層を構成する繊維のうち多くとも５０質量％をコットン繊維とすることが好ましく、コットン繊維と混合して使用する繊維としては、上記した他のセルロース系繊維でもよいが、ポリエステル系繊維やポリオレフィン系繊維、アクリル繊維、ナイロン繊維等の吸水性に乏しい熱可塑性合成繊維が好ましい。合成繊維のなかでも、横断面形状において中空部を有しない繊維がよい。合成繊維の中空部に抱き込んだ水分や液体が放出しにくくなることを防ぐためである。 When a cotton fiber is used as the cellulosic fiber as the outer layer, it may be composed of only a cotton fiber, but it is preferably at most 50% by mass and mixed with other fibers. The cotton fiber has a hollow structure called a lumen, and liquid and moisture can be taken into this hollow portion, so the cotton fiber itself has high water absorption. However, once liquid or moisture is held in the hollow portion, it is not easily released. Therefore, in view of the object of the present invention of the ability to release liquid and moisture, when using cotton fibers as the cellulosic fibers, it is preferable that at most 50% by mass of the fibers constituting the outer layer be cotton fibers. The fibers used by mixing with the fibers may be other cellulose fibers described above, but are preferably thermoplastic synthetic fibers having poor water absorption, such as polyester fibers, polyolefin fibers, acrylic fibers, and nylon fibers. Among the synthetic fibers, fibers that do not have a hollow portion in the cross-sectional shape are preferable. This is to prevent moisture and liquid embraced in the hollow portion of the synthetic fiber from becoming difficult to release.
コットン繊維以外のセルロース系繊維（再生セルロース繊維、精製セルロース繊維）は、中空部を有していないため、上記したように、中空部に液体や水分を溜め込んで放出しにくいことがない。したがって、外層を構成する繊維として、再生セルロース繊維や精製セルロース繊維を用いる場合は、これらの繊維のみによって構成することが好ましいが、本発明の目的を達成する範囲で、少量であれば他の繊維を混合してもよい。 Cellulosic fibers other than cotton fibers (regenerated cellulose fibers and purified cellulose fibers) do not have a hollow portion, and therefore, as described above, liquids and moisture are not accumulated in the hollow portion and are not easily released. Therefore, when regenerated cellulose fiber or purified cellulose fiber is used as the fiber constituting the outer layer, it is preferable to use only these fibers, but other fibers can be used in a small amount within the scope of achieving the object of the present invention. May be mixed.
外層を構成する繊維同士は、交絡により一体化していることが好ましく、外層と中間層とは、層間において、少なくとも外層を構成する繊維が、中間層を構成する繊維に絡みつくことによって層間が一体化している。外層を構成する繊維同士が、交絡により一体化することによって、清拭シート表面の風合いが良好となり、拭き取り対象物に対してキズ等をつける恐れがなく、肌あたりが柔らかで良好となる。また、中間層と外層との層間が、外層を構成する繊維が中間層に絡み付いて一体化することにより、外層を構成するセルロース系繊維を通じて、中間層に保液してなる水分を良好に外層側に放出することができる。交絡による一体化は、公知の水流交絡処理によって得られることができる。交絡処理が良好に行えるには、外層を構成する繊維は、連続繊維ではなく、短繊維によって構成されることがよい。短繊維の繊維長は、カード機で開繊しうる程度の長さであればよく、一般に、繊維長が１０〜１００ｍｍ程度のものがよい。 It is preferable that the fibers constituting the outer layer are integrated by entanglement, and the outer layer and the intermediate layer are integrated with each other when at least the fibers constituting the outer layer are entangled with the fibers constituting the intermediate layer. ing. When the fibers constituting the outer layer are integrated by entanglement, the surface of the wiping sheet has a good texture, and there is no fear of scratching the object to be wiped, and the skin is soft and good. Also, the interlayer between the intermediate layer and the outer layer is formed by entwining the fibers constituting the outer layer with the intermediate layer so that the water retained in the intermediate layer can be satisfactorily retained through the cellulose fibers constituting the outer layer. Can be released to the side. Integration by entanglement can be obtained by a known hydroentanglement process. In order to perform the entanglement treatment satisfactorily, the fibers constituting the outer layer are preferably constituted by short fibers, not continuous fibers. The fiber length of the short fiber may be a length that can be opened by a card machine, and generally has a fiber length of about 10 to 100 mm.
外層を構成する繊維の単繊維繊度は、清拭対象等の使用目的により適宜選択すればよいが、ソフト性等を考慮すると、１〜３ｄｔｅｘの範囲のものがよい。 The single fiber fineness of the fibers constituting the outer layer may be appropriately selected depending on the purpose of use such as the object to be wiped. However, in consideration of softness and the like, those in the range of 1 to 3 dtex are preferable.
外層と中間層との目付の質量比は、清拭性や保液性、保持した液体や水分の放出性を考慮すると、外層（片側の層）／中間層＝１／２〜１．５／１が好ましい。また、清拭シートを構成する３層構造不織布の目付は、４０〜８０ｇ／ｍ２程度がよい。 The mass ratio of the weight per unit area of the outer layer and the intermediate layer is determined based on the wiping property, the liquid retaining property, and the released properties of the retained liquid and moisture. The outer layer (one side layer) / the intermediate layer = 1/2 to 1.5 / 1 is preferred. Further, the basis weight of the three-layered nonwoven fabric constituting the wiping sheet is preferably about 40 to 80 g / m 2 .
次いで、本発明の３層構造不織布から構成される清拭シートの製造方法の一例について、説明する。 Subsequently, an example of the manufacturing method of the wiping sheet comprised from the three-layer structure nonwoven fabric of this invention is demonstrated.
まず、保水層の役割の担う中間層となる不織布を準備する。上記したように合成繊維から構成され繊維同士が熱接着により一体化してなるエアースルー不織布あるいはサーマルボンド不織布がよい。 First, the nonwoven fabric used as the intermediate | middle layer which plays the role of a water retention layer is prepared. As described above, an air-through nonwoven fabric or a thermal bond nonwoven fabric composed of synthetic fibers and integrated by thermal bonding is preferable.
次いで、外層を構成するセルロース系繊維を含む短繊維ウェブを準備する。短繊維ウェブは、セルロース系繊維としてコットン繊維を採用した場合は、熱可塑性合成繊維と混合してなる混合ウェブとすることがより好ましいが、コットン繊維のみによるウェブであっても、コットン繊維と他のセルロース系繊維との混合ウェブであってもよい。セルロース系繊維として、再生セルロース繊維や精製セルロース繊維を採用した場合は、これらの繊維のみからなるウェブがよい。 Next, a short fiber web containing cellulosic fibers constituting the outer layer is prepared. When cotton fibers are used as the cellulosic fibers, the short fiber web is more preferably a mixed web formed by mixing with thermoplastic synthetic fibers. It may be a mixed web with cellulosic fibers. When a regenerated cellulose fiber or a purified cellulose fiber is employed as the cellulose fiber, a web composed only of these fibers is preferable.
中間層となる不織布の両面にセルロース系繊維を含む短繊維ウェブを積層した積層体を得、得られた積層体に高圧水流を施す。高圧水流を施す際、積層体はメッシュ状支持体に担持し、高圧水流は、積層体側すなわちメッシュ状支持体側の反対側から施す。高圧水流は、孔径０．０５〜２．０ｍｍの噴射孔が、噴射孔感覚０．０５〜１０ｍｍで一列または複数列配置されている噴射装置を用い、たとえば、１．５〜２０ＭＰａで水を噴出させて得られるものである。高圧水流は、積層体に一回または二回以上施す。この高圧水流は、メッシュ状支持体に担持されている積層体に衝突すると、高圧水流のエネルギーが積層体の構成繊維を運動させるエネルギーとなり、構成繊維相互間を交絡させるのである。すなわち、外層を構成する繊維同士が交絡し、また、外層を構成する繊維が中間層に絡み付き、３層を一体化させる。高圧水流を施した積層体には、水が含浸されているため、積層体を絞って過剰な水分を除去して、本発明の３層構造不織布からなる清拭シートを得る。 A laminated body in which short fiber webs containing cellulosic fibers are laminated on both surfaces of a nonwoven fabric to be an intermediate layer is obtained, and high pressure water flow is applied to the obtained laminated body. When the high-pressure water flow is applied, the laminate is supported on the mesh-like support, and the high-pressure water flow is applied from the side of the laminate, that is, the side opposite to the mesh-like support. The high-pressure water flow uses an injection device in which injection holes with a hole diameter of 0.05 to 2.0 mm are arranged in one or more rows with an injection hole feeling of 0.05 to 10 mm, for example, water is injected at 1.5 to 20 MPa. Can be obtained. The high-pressure water stream is applied to the laminate once or twice or more. When this high-pressure water stream collides with the laminate carried on the mesh-like support, the energy of the high-pressure water stream becomes energy that moves the constituent fibers of the laminate, and the constituent fibers are entangled. That is, the fibers constituting the outer layer are entangled, and the fibers constituting the outer layer are entangled with the intermediate layer to integrate the three layers. Since the laminate subjected to the high-pressure water flow is impregnated with water, excess moisture is removed by squeezing the laminate to obtain a wiping sheet comprising the three-layer structure nonwoven fabric of the present invention.
本発明の清拭シートは、上記した構成を採用したことから、３層構造不織布の質量（１００質量部）に対して４００質量部以上の液体を良好に保持するとともに、清拭の際には、その保持した液体や水分を良好に放出して清拭対象物に効率良く移行させることができる。この保持した液体や水分を良好に放出して移行させることができるという優れた液体や水分の放出性は、下記の液体放出性により評価する。 Since the wiping sheet of the present invention employs the above-described configuration, the liquid of 400 parts by mass or more is favorably retained with respect to the mass (100 parts by mass) of the three-layered nonwoven fabric, and at the time of wiping. The retained liquid and moisture can be discharged well and efficiently transferred to the object to be wiped. The excellent liquid and moisture releasability that the retained liquid and water can be released and transferred is evaluated by the following liquid releasability.
３層構造不織布の質量（１００質量部）に対して４００質量部以上の液体または水分を含んでなる清拭シート（試料）１００ｍｍ×１００ｍｍを準備し、３回押圧により、放出した合計液体量が、当初含んでなる液体量に対して、５０質量％以上であると、液体放出性が５０％以上であるとし、良好に液体を放出移行させることができ、液体放出性が良好であると評価した。また、この合計液体量が６０％以上であると、液体放出性がより優れていると評価できる。さらには、１回目の押圧の際に放出した液体量が、３０質量％以上であることが好ましく、より好ましくは４０％以上である。また、２回目の押圧の際に放出した合計液体量が４０％質量以上であることが好ましく、より好ましくは５０％以上である。 A wiping sheet (sample) 100 mm × 100 mm containing 400 parts by mass or more of liquid or moisture with respect to the mass (100 parts by mass) of the three-layered nonwoven fabric is prepared, and the total amount of liquid released by pressing three times is When the amount is 50% by mass or more with respect to the amount of liquid initially contained, the liquid release property is assumed to be 50% or more, and the liquid can be discharged and transferred well, and the liquid release property is evaluated to be good. did. Moreover, when this total liquid amount is 60% or more, it can be evaluated that the liquid releasing property is more excellent. Furthermore, the amount of liquid released during the first pressing is preferably 30% by mass or more, and more preferably 40% or more. Moreover, it is preferable that the total liquid amount discharged | emitted in the case of the 2nd press is 40% mass or more, More preferably, it is 50% or more.
押圧は、直径約４１ｍｍ、質量５００ｇの分銅を用いて、液体を含む試料の上に濾紙（アドバンテックＮｏ．２）を３枚重ねて載せて、その上に前記分銅を静かに置き、３秒後に分銅と濾紙を取り除き、清拭シートの質量を測定し、放出した液体（水分）の量を算出した。この（１）分銅による押圧、（２）分銅と濾紙の除去、（３）清拭シートの質量測定の（１）〜（３）の一連の動作を３回繰り返して、１回目の押圧により放出した液体量、２回目の押圧により放出した液体量と２回押圧による放出した合計液体量、３回目の押圧により放出した液体量と３回押圧による放出した合計液体量をそれぞれ算出し、当初含んでいた液体量に対して、３回押圧によって放出した合計液体量の比率を求め、これを液体放出性として評価した。なお、濾紙はその都度、新しいものを使用した。 Pressing uses a weight with a diameter of about 41 mm and a mass of 500 g, and three filter papers (Advantech No. 2) are placed on top of the sample containing the liquid, and the weight is gently placed on it, and after 3 seconds. The weight and filter paper were removed, the mass of the wiping sheet was measured, and the amount of liquid (water) released was calculated. (1) Pressing with a weight, (2) Removing the weight and filter paper, (3) Repeating the series of operations (1) to (3) of wiping sheet mass measurement three times, and releasing by the first pressing Calculated, the amount of liquid released by the second press, the total amount of liquid released by the second press, the amount of liquid released by the third press, and the total amount of liquid released by the third press, respectively, The ratio of the total amount of liquid released by pressing three times with respect to the amount of liquid that was discharged was determined, and this was evaluated as the liquid releasing property. A new filter paper was used each time.
また、上記では、すでに液体が含まれてなる清拭シートについての評価であるが、本発明では、液体を含ませて使用する清拭シートであって、液体を含ませる前の状態の清拭シートについても、本発明の範囲内とする。その場合は、市販の化粧水を用いて評価し、３回押圧により、放出した合計液体量が、当初含ませた液体量に対して、５０質量％以上であることにより、良好に液体を放出移行させることができ、液体放出性が良好であると評価した。また、この合計液体量が６０質量％以上であると、液体放出性がより優れていると評価できる。さらには、上記と同様で、１回目の押圧の際に放出した液体が、３０質量％以上であることが好ましく、より好ましくは４０質量％以上である。また、２回目の押圧の際に放出した合計液体量が４０質量％以上であることが好ましく、より好ましくは５０質量％以上である。 In the above description, the evaluation is for a wiping sheet that already contains a liquid. However, in the present invention, the wiping sheet is used by including a liquid, and the wiping state before the liquid is included is used. Sheets are also within the scope of the present invention. In that case, it is evaluated using a commercially available lotion, and when the total amount of liquid released by pressing three times is 50% by mass or more with respect to the amount of liquid initially contained, the liquid is released well. It was able to be transferred and evaluated that liquid discharge | release property was favorable. Moreover, it can be evaluated that the liquid discharge | release property is more excellent in this total liquid amount being 60 mass% or more. Further, as in the above, the amount of liquid released during the first pressing is preferably 30% by mass or more, and more preferably 40% by mass or more. Moreover, it is preferable that the total liquid amount discharge | released in the case of the 2nd press is 40 mass% or more, More preferably, it is 50 mass% or more.
液体が含まれていない清拭シートについての液体放出性の評価は、１００ｍｍ×１００ｍｍの試料（清拭シート）を準備し、この清拭シートの質量を測定した後、清拭シートの質量（１００質量部）に対して、４００質量部の液体を清拭シートに含ませる。液体としては化粧水を用い、具体的には、ロート製薬社製 商品名「肌研 白潤薬用美白化粧水」を用いた。押圧は、上記と同様で、直径約４１ｍｍ、質量５００ｇの分銅を用いて、液体を含む試料の上に濾紙（アドバンテックＮｏ．２）を３枚重ねて載せて、その上に前記分銅を静かに置き、３秒後に分銅と濾紙を取り除き、清拭シートの質量を測定し、放出した液体（水分）の量を算出した。この（１）分銅による押圧、（２）分銅と濾紙の除去、（３）清拭シートの質量測定の（１）〜（３）の一連の動作を３回繰り返して、１回目の押圧により放出した液体量、２回目の押圧により放出した液体量と２回押圧による放出した合計液体量、３回目の押圧により放出した液体量と３回押圧による放出した合計液体量をそれぞれ算出し、当初含ませた液体量に対して、３回押圧によって放出した合計液体量の比率を求め、これを液体放出性として評価した。なお、濾紙はその都度、新しいものを使用した。 Evaluation of the liquid discharge | release property about the wiping sheet which does not contain the liquid prepared the sample (wiping sheet) of 100 mm x 100 mm, measured the mass of this wiping sheet, then measured the mass of the wiping sheet (100 400 parts by mass of liquid is included in the wiping sheet with respect to (parts by mass). As the liquid, lotion was used, and specifically, the product name “Skin Kenhaku Whitening Lotion” was used. Pressing is the same as above, using a weight of about 41 mm in diameter and 500 g in mass, placing three filter papers (Advantech No. 2) on top of the sample containing the liquid, and gently placing the weight on it. After 3 seconds, the weight and filter paper were removed, the mass of the wiping sheet was measured, and the amount of liquid (water) released was calculated. (1) Pressing with a weight, (2) Removing the weight and filter paper, (3) Repeating the series of operations (1) to (3) of wiping sheet mass measurement three times, and releasing by the first pressing Calculated, the amount of liquid released by the second press, the total amount of liquid released by the second press, the amount of liquid released by the third press, and the total amount of liquid released by the third press, respectively. The ratio of the total liquid amount released by pressing three times with respect to the liquid amount was determined, and this was evaluated as the liquid releasing property. A new filter paper was used each time.
本発明の清拭シートの大きさは、清拭対象物に応じて、適宜設計すればよい。清拭対象物が、比較的大きい面積の場合は、一辺の長さが１０数ｃｍ〜３０ｃｍ程度がよい。また、身体の清拭用の場合は、片手での取扱い性を考慮して１０ｃｍ〜２０ｃｍ程度がよい。また、いわゆる化粧水やメイク落とし等の顔用に用いる場合は、数ｃｍ〜１０ｃｍ程度がよい。 What is necessary is just to design the magnitude | size of the wiping sheet of this invention suitably according to the wiping target object. When the object to be wiped has a relatively large area, the length of one side is preferably about several tens of cm to 30 cm. In the case of wiping the body, it is preferably about 10 cm to 20 cm in consideration of handleability with one hand. Moreover, when using it for face, such as so-called lotion and makeup remover, several cm-about 10 cm are good.
本発明の清拭シートは、使用上の便宜のために予め化粧水が含浸してなる化粧シートとしてや、所望の清拭用液体等が含浸してなる液体含浸清拭シートとしても用いられるものである。また、使用者が、ドライの状態の清拭シートに、その都度、好みの液体を含浸させて使用してもよいものである。 The wiping sheet of the present invention can be used as a cosmetic sheet impregnated with lotion in advance for convenience in use, or as a liquid-impregnated wiping sheet impregnated with a desired wiping liquid or the like. It is. In addition, the user may use a dry wiping sheet impregnated with a favorite liquid each time.
本発明の清拭シートは、中間層と、その中間層の両面に位置する２つの外層との３層構造であり、中間層は、熱可塑性合成繊維のみから構成され、外層は、セルロース系繊維が少なくとも含まれている。外層に挟まれてなる中間層は、清拭の際に染み込ませる液体を保持する保水層であり、外層は、清拭の際に、清拭対象物と直に接する層であって清拭性を発揮する清拭層である。本発明の清拭シートは、液体や水分を清拭シートに含む状態においては、中間層の両面に位置する外層が、中間層が保持してなる水分を外層よりも外部に染み出ないように、中間層を挟み込むことによって閉じ込める役割を担うことから、大量の液体を中間層の繊維間空隙内に良好に保持することができ、一方、清拭の際に、清拭シート面に押圧する力が加わると、押圧により中間層の空隙が押し潰されて、中間層内の空隙に保有していた水分や液体が、外層側に移動して、今まで中間層にて保持していた液体や水分を効果的に外層よりも外部へ放出し、清拭対象物に放出移行することができ、効率よく清拭作業を行うことができる。 The wiping sheet of the present invention has a three-layer structure of an intermediate layer and two outer layers located on both sides of the intermediate layer, and the intermediate layer is composed only of thermoplastic synthetic fibers, and the outer layer is made of cellulosic fibers. Is included at least. The intermediate layer sandwiched between the outer layers is a water retaining layer that holds the liquid soaked during wiping, and the outer layer is a layer that is in direct contact with the object to be wiped during wiping and has a wiping property. It is a wiping layer that demonstrates. In the state where the wiping sheet of the present invention contains liquid or moisture in the wiping sheet, the outer layer located on both surfaces of the intermediate layer does not ooze out the moisture formed by the intermediate layer from the outer layer. Since it plays a role of confinement by sandwiching the intermediate layer, it can hold a large amount of liquid well in the inter-fiber gap of the intermediate layer, and on the other hand, the force that presses against the wiping sheet surface during wiping When the pressure is applied, the voids in the intermediate layer are crushed by the pressure, and the moisture and liquid retained in the voids in the intermediate layer move to the outer layer side. Moisture can be effectively discharged to the outside of the outer layer and transferred to the object to be wiped, so that the wiping operation can be performed efficiently.
以下、本発明を実施例に基づいて説明するが、本発明は実施例に限定されるものではない。また、水分放出性の評価方法は、上述したとおりである。 EXAMPLES Hereinafter, although this invention is demonstrated based on an Example, this invention is not limited to an Example. In addition, the method for evaluating the water releasing property is as described above.
実施例１
中間層として、ポリプロピレンが芯、ポリエチレンが鞘に配されてなるポリオレフィン系複合短繊維（単繊維繊度２．２ｄｔｅｘ）のみから構成され、構成繊維同士が繊維の交点で溶融固化してなるエアースルー不織布（目付２０ｇ／ｍ２）を準備した。このエアースルー不織布のバイレック法による吸水性は、３．２ｍｍであった。
また、外層を構成する繊維として、リヨセル繊維（単繊維繊度１．７ｄｔｅｘ、繊維長３８ｍｍ）を準備し、構成繊維としてリヨセル繊維のみからなる短繊維ウェブ（目付２０ｇ／ｍ２）をカード法により作成した。
Example 1
As an intermediate layer, an air-through nonwoven fabric composed of only polyolefin-based composite short fibers (single fiber fineness 2.2 dtex) in which polypropylene is arranged in the core and polyethylene in the sheath, and the constituent fibers are melted and solidified at the intersection of the fibers. (A basis weight of 20 g / m 2 ) was prepared. The water-absorbing property of this air-through nonwoven fabric by the Birec method was 3.2 mm.
In addition, lyocell fibers (single fiber fineness 1.7 dtex, fiber length 38 mm) are prepared as fibers constituting the outer layer, and a short fiber web (weight per unit area 20 g / m 2 ) made only of lyocell fibers is prepared by a card method. did.
短繊維ウエブ／エアースルー不織布／短繊維ウエブの順に積層して積層体を得、この積層体に水流交絡処理を施した。水流交絡処理は、１００メッシュのメッシュ状支持体上に前記積層体を載置して、プレウエット行程を経た後、ノズル孔径０．１ｍｍの噴射孔が孔間隔０．６ｍｍで横一列に配置された噴出装置を用い、４．１１ＭＰａの圧力で３回処理し、さらに反転し同じ水圧で３回処理を行い、目付６０ｇ／ｍ２の実施例１の清拭シートを得た。 A laminate was obtained by laminating the short fiber web / air-through nonwoven fabric / short fiber web in this order, and the hydroentanglement treatment was applied to the laminate. In the hydroentanglement process, the laminated body is placed on a 100-mesh mesh-like support, and after a prewetting process, nozzle holes having a nozzle hole diameter of 0.1 mm are arranged in a horizontal row with a hole interval of 0.6 mm. Then, the wiping sheet of Example 1 having a basis weight of 60 g / m 2 was obtained by performing the treatment three times at a pressure of 4.11 MPa, further inverting and performing the treatment three times at the same water pressure.
実施例２
実施例１において、外層として、リヨセル繊維に換えて、レーヨン繊維（単繊維繊度１．７ｄｔｅｘ、繊維長４０ｍｍ）を用いたこと以外は、実施例１と同様にして、目付６０ｇ／ｍ２の実施例２の清拭シートを得た。
Example 2
In Example 1, in place of lyocell fiber as an outer layer, rayon fiber (single fiber fineness 1.7 dtex, fiber length 40 mm) was used in the same manner as in Example 1 with a basis weight of 60 g / m 2 . The wiping sheet of Example 2 was obtained.
実施例３
実施例１において、外層の短繊維ウェブとして、コットン繊維（単繊維繊度１．７ｄｔｅｘ、平均繊維長１８ｍｍ）とポリエステル繊維（単繊維繊度１．４５ｄｔｅｘ、繊維長３３ｍｍ）との混合短繊維ウェブ（混合比率は質量比で５０／５０）を用いたこと以外は、実施例１と同様にして、目付６０ｇ／ｍ２の実施例３の清拭シートを得た。
Example 3
In Example 1, as a short fiber web of the outer layer, a mixed short fiber web (mixed) of cotton fibers (single fiber fineness 1.7 dtex, average fiber length 18 mm) and polyester fibers (single fiber fineness 1.45 dtex, fiber length 33 mm). A wiping sheet of Example 3 having a basis weight of 60 g / m 2 was obtained in the same manner as Example 1 except that the ratio was 50/50) by mass ratio.
実施例４
実施例１において、外層として、リヨセルに換えて、コットン繊維（単繊維繊度１．７ｄｔｅｘ、平均繊維長１８ｍｍ）を用いたこと以外は、実施例１と同様にして、目付６０ｇ／ｍ２の実施例４の清拭シートを得た。
Example 4
In Example 1, in place of lyocell as an outer layer, cotton fibers (single fiber fineness of 1.7 dtex, average fiber length of 18 mm) were used in the same manner as in Example 1 with a basis weight of 60 g / m 2 . The wiping sheet of Example 4 was obtained.
実施例５
実施例１において、外層の短繊維ウェブとして、コットン繊維（単繊維繊度１．７ｄｔｅｘ、平均繊維長１８ｍｍ）とリヨセル繊維（単繊維繊度１．７ｔｅｘ、繊維長３８ｍｍ）との混合短繊維ウェブ（混合比率は質量比で５０／５０）を用いたこと以外は、実施例１と同様にして、目付６０ｇ／ｍ２の実施例５の清拭シートを得た。
Example 5
In Example 1, as a short fiber web of the outer layer, a mixed short fiber web (mixed) of cotton fibers (single fiber fineness 1.7 dtex, average fiber length 18 mm) and lyocell fibers (single fiber fineness 1.7 tex, fiber length 38 mm). A wiping sheet of Example 5 having a basis weight of 60 g / m 2 was obtained in the same manner as in Example 1 except that the ratio was 50/50) by mass ratio.
実施例６
実施例１において、外層の短繊維ウェブとして、コットン繊維（単繊維繊度１．７ｄｔｅｘ、平均繊維長１８ｍｍ）とレーヨン繊維（単繊維繊度１．７ｔｅｘ、繊維長４０ｍｍ）との混合短繊維ウェブ（混合比率は質量比で５０／５０）を用いたこと以外は、実施例１と同様にして、目付６０ｇ／ｍ２の実施例６の清拭シートを得た。
Example 6
In Example 1, as a short fiber web of the outer layer, a mixed short fiber web (mixed) of cotton fibers (single fiber fineness 1.7 dtex, average fiber length 18 mm) and rayon fibers (single fiber fineness 1.7 tex, fiber length 40 mm). A wiping sheet of Example 6 having a basis weight of 60 g / m 2 was obtained in the same manner as in Example 1 except that the ratio was 50/50) by mass ratio.
比較例１
実施例１において、中間層を用いず、構成繊維としてコットン繊維（単繊維繊度１．７ｄｔｅｘ、平均繊維長１８ｍｍ）のみからなる短繊維ウェブ（目付６０ｇ／ｍ２）をカード法により作成し、実施例１と同様の水流交絡処理を施して、目付６０ｇ／ｍ２の比較例１の清拭シートを得た。
Comparative Example 1
In Example 1, a short fiber web (weight per unit area 60 g / m 2 ) composed only of cotton fibers (single fiber fineness 1.7 dtex, average fiber length 18 mm) as a constituent fiber was prepared by a card method without using an intermediate layer. The water entanglement process similar to Example 1 was performed, and the wiping sheet | seat of the comparative example 1 of 60 g / m < 2 > of fabric weights was obtained.
比較例２
実施例１において、中間層を用いず、構成繊維としてリヨセル繊維のみからなる短繊維ウェブ（目付６０ｇ／ｍ２）をカード法により作成し、実施例１と同様の水流交絡処理を施して、目付６０ｇ／ｍ２の比較例２の清拭シートを得た。
Comparative Example 2
In Example 1, an intermediate layer is not used, a short fiber web (weight per unit: 60 g / m 2 ) made only of lyocell fibers as a constituent fiber is prepared by the card method, and the hydroentanglement process similar to that in Example 1 is performed to obtain a basis weight. A wiping sheet of Comparative Example 2 at 60 g / m 2 was obtained.
比較例３
実施例１において、中間層を用いず、構成繊維としてレーヨン繊維（単繊維繊度１．７ｄｔｅｘ、繊維長４０ｍｍ）のみからなる短繊維ウェブ（目付６０ｇ／ｍ２）をカード法により作成し、実施例１と同様の水流交絡処理を施して、目付６０ｇ／ｍ２の比較例４の清拭シートを得た。
Comparative Example 3
In Example 1, a short fiber web (weight per unit area 60 g / m 2 ) made only of rayon fibers (single fiber fineness 1.7 dtex, fiber length 40 mm) as a constituent fiber was prepared by a card method without using an intermediate layer. The water entanglement process similar to 1 was given, and the wiping sheet | seat of the comparative example 4 of 60 g / m < 2 > of fabric weights was obtained.
比較例４
実施例１において、中間層を用いず、構成繊維としてコットン繊維（単繊維繊度１．７ｄｔｅｘ、平均繊維長１８ｍｍ）とポリエステル繊維（単繊維繊度１．４５ｄｔｅｘ、繊維長３３ｍｍ）との混合短繊維ウェブ（混合比率は質量比で５０／５０ 目付６０ｇ／ｍ２）をカード法により作成し、実施例１と同様の水流交絡処理を施して、目付６０ｇ／ｍ２の比較例４の清拭シートを得た。
Comparative Example 4
In Example 1, a mixed short fiber web of cotton fibers (single fiber fineness 1.7 dtex, average fiber length 18 mm) and polyester fibers (single fiber fineness 1.45 dtex, fiber length 33 mm) without using an intermediate layer as constituent fibers. (Mixing ratio is 50/50 mass per unit weight 60 g / m 2 ) by the card method, and the hydroentanglement process similar to Example 1 is performed, and the wiping sheet of Comparative Example 4 having a mass per unit of 60 g / m 2 Obtained.
得られた実施例および比較例の清拭シートについて、液体放出性の評価を上述した方法によりした。評価は、清拭シートの質量１００質量部に対して、４００質量部の化粧水（ロート製薬社製 商品名「肌研 白潤薬用美白化粧水」）を含ませて評価した。評価結果を表１に示した。 About the wiping sheet | seat of the obtained Example and comparative example, liquid release evaluation was performed by the method mentioned above. The evaluation was performed by including 400 parts by mass of a lotion (trade name “Skin Kenhaku whitening lotion for skin cleansing”) by 100 parts by mass of the wiping sheet. The evaluation results are shown in Table 1.
表１の評価結果からも分かるように、本発明の実施例１〜６の清拭シートは、中間層が存在することにより、含ませた液体を押圧により効率よく、かつ効果的に放出・移行させることができるものであった。
As can be seen from the evaluation results in Table 1, the wiping sheets of Examples 1 to 6 of the present invention are efficiently and effectively released and transferred by pressing the contained liquid due to the presence of the intermediate layer. It was something that could be made.
Claims (7)
中間層を構成する繊維は、熱可塑性合成繊維のみからなり、
外層を構成する繊維には、少なくともセルロース系繊維が含まれており、
両面に位置する外層と中間層とは、層間において、少なくとも外層を構成する繊維が、中間層を構成する繊維に絡みつくことによって層間が一体化しており、
清拭シートは、３層構造不織布の質量（１００質量部）に対して４００質量部以上の液体を含んでおり、液体放出性が５０質量％以上であることを特徴とする清拭シート。 It is a wiping sheet composed of a three-layered nonwoven fabric composed of an intermediate layer and outer layers located on both sides of the intermediate layer,
The fibers constituting the intermediate layer consist only of thermoplastic synthetic fibers,
The fibers constituting the outer layer include at least cellulosic fibers,
Between the outer layer and the intermediate layer located on both sides, at least the fibers constituting the outer layer are entangled with the fibers constituting the intermediate layer, and the layers are integrated.
The wiping sheet contains 400 parts by mass or more of liquid with respect to the mass (100 parts by mass) of the three-layered nonwoven fabric, and the liquid releasing property is 50% by mass or more.
中間層を構成する繊維は、熱可塑性合成繊維のみからなり、
外層を構成する繊維には、少なくともセルロース系繊維が含まれており、
両面に位置する外層と中間層とは、層間において、少なくとも外層を構成する繊維が、中間層を構成する繊維に絡みつくことによって層間が一体化しており、
液体放出性が５０質量％以上であることを特徴とする液体を含ませて使用する清拭シート。
It is a wiping sheet composed of a three-layered nonwoven fabric composed of an intermediate layer and outer layers located on both sides of the intermediate layer, the wiping sheet used to contain a liquid,
The fibers constituting the intermediate layer consist only of thermoplastic synthetic fibers,
The fibers constituting the outer layer include at least cellulosic fibers,
Between the outer layer and the intermediate layer located on both sides, at least the fibers constituting the outer layer are entangled with the fibers constituting the intermediate layer, and the layers are integrated.
A wiping sheet used by including a liquid, wherein the liquid releasing property is 50% by mass or more.
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