JP2006026001A - Nonwoven fabric for cleaning skin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nonwoven fabric for cleaning the skin exhibiting fine foaming and favorable detergent performance. <P>SOLUTION: This nonwoven fabric 10 for cleaning the skin has a three-layer structure formed by holding a hydrophilic fiber intermediate layer 11 between hydrophobic fiber front layer 12 and back layer 13 and the respective layers 11, 12 and 13 are integrated together by hydroentanglement. This fabric is constituted of the intermediate layer 11 of 30-60 mass% and the front layer 12 and the back layer of 70-40 mass% in total relative to the whole. The 50-80 mass% of the hydrophobic fiber constituting the front layer 12 and the back layer 13 is split yarn. Water-based detergent included in the intermediate layer forms fine foams when passing the front layer 12 and the back layer 13 having the split yarns. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a non-woven fabric for skin cleaning with good foaming and little physical irritation, and can be suitably used for cleaning, for example, a wound surface, surrounding skin, or fragile skin.

  Medical gauze and hydrophilic fiber non-woven fabric are used exclusively for cleaning the wound surface and its surroundings. However, in the case of the above medical gauze, foaming of the cleaning agent is poor, and the touch is rough and physical irritation is expected. It is hard to say that it is suitable because it is strong outside. In the case of non-woven fabric made of hydrophilic fibers, there is little physical irritation, and water-based detergent retainability is high, which is preferable in these respects. When operated, it is difficult to handle due to curling, and for this reason, there is a disadvantage that foaming also worsens.

  Therefore, a nonwoven fabric in which hydrophilic fibers, hydrophobic fibers, and hydrophobic adhesive fibers are entangled by a hydroentanglement method has been proposed as a fabric for washing skin with good foaming (conventional example [1]) (for example, patent document) 1). The nonwoven fabric for skin cleaning of the conventional example [1] contains hydrophilic fibers as described above, so that it can sufficiently maintain an aqueous cleaning agent, and also contains hydrophobic fibers, so the resilience of the nonwoven fabric is good even when wet. It is easy to foam, and in addition, since each fiber is bonded by an adhesive fiber, the fiber is difficult to come off and the shape stability is good.

In addition, as a puff used for putting lotion, etc., a nonwoven fabric in which fiber layers mainly composed of hydrophilic fibers are laminated on the front and back surfaces of fiber layers mainly composed of hydrophobic fibers and integrated by hydroentanglement has been proposed. (Conventional example [2]) (see, for example, Patent Document 2), it is also conceivable to use such a non-woven fabric for a cosmetic puff when washing the skin.
JP 2003-38381 A Japanese Utility Model Publication No. 61-47918

  However, although the nonwoven fabric for skin cleaning of the above-mentioned conventional example [1] has good foaming, its texture is rough and further improvement is desired.

  Moreover, although the thing of the said prior art example [2] can be used favorably as a cosmetic puff, when this is used for washing | cleaning, since foaming is inferior, a favorable cleaning effect cannot be exhibited.

  Accordingly, the present invention has been made paying attention to the above-described circumstances, and an object of the present invention is to provide a non-woven fabric for skin cleaning that can exhibit good cleanability with fine foaming.

  The nonwoven fabric for skin cleaning according to the present invention has a three-layer structure in which an intermediate layer made of hydrophilic fibers is sandwiched between a surface layer and a back layer made of hydrophobic fibers, and these layers are integrated by hydroentanglement. And 50 to 80% by mass of the hydrophobic fibers constituting the surface layer and the back layer are divided fibers. “Divided fiber” is a composite spinning of two different components, which are divided into ultrafine fibers (generally 0.4 to 1.0 dtex) or ultrafine fibers (generally finer than ultrafine fibers, meaning 0.001 dtex). It is.

  In the non-woven fabric for skin cleaning of the present invention, moisture and water-based cleaning agent are well retained by the middle hydrophilic fiber intermediate layer, and the hydrophobic fiber surface layer and back layer firmly repel even when wet. In addition to being prevented, when an operation of squeezing and foaming the skin-cleaning nonwoven fabric is carried out, the aqueous cleaning agent contained in the hydrophilic fiber intermediate layer is converted into the hydrophobic fiber surface layer and back surface of the intermediate layer front and back surfaces. When passing through the layer, it mixes with the air between the hydrophobic fibers and foams well. In addition, since the split fibers contained in the surface layer and the back layer form a fine (narrow) gap between the hydrophobic fibers, the bubbles are fine. In particular, since the split fiber is manufactured by splitting a composite spun fiber, the cross section of the fiber is flat or angular, so in the case of a super fine fiber with a circular cross section having the same fineness. In comparison, many voids can be formed, and fine bubbles can be abundantly produced.

  As described above, the content of the split fibers is 50 to 80% by mass of the hydrophobic fibers of the surface layer and the back layer. If the split fibers are too small, fine foaming cannot be expected so much. If it is too much, there is a concern that the texture becomes firm and the texture becomes stiff.

  In addition, since the intermediate layer, the surface layer, and the back layer are integrated by hydroentanglement as described above, there is almost no concern that the surface layer and the back layer are peeled off from the intermediate layer. As described above, good fine bubbles are formed by the contained cleaning agent. In addition, in the vicinity of each interface of the intermediate layer, the surface layer, and the back layer, the fibers are mixed with each other, and a clear boundary surface is not formed.

  The ratio of the hydrophilic fiber intermediate layer is preferably 30 to 60% by mass with respect to the entire nonwoven fabric for skin cleaning. If the amount is less than 30% by mass, the skin-cleaning nonwoven fabric is inferior in water absorption, and the amount of water-based cleaning agent and moisture retained decreases, and foaming may be deteriorated. On the other hand, if it exceeds 60% by mass, the proportion of the entire nonwoven fabric becomes too high, so even if it is sandwiched between the surface layer and the back layer made of hydrophobic fibers, the stiffness of the intermediate layer made of hydrophilic fibers during water absorption is reduced. This is because there is a risk that it will be difficult to foam due to curling.

  The total of the surface layer and the back layer made of hydrophobic fibers is preferably 40 to 70% by mass with respect to the entire nonwoven fabric for skin cleaning, and if it is less than 40% by mass, the resilience of the nonwoven fabric for skin cleaning becomes poor, and the above-mentioned If the amount of the intermediate layer made of the hydrophilic fiber is relatively high, the water-based cleaning agent may be reduced as described above. This is because there is a risk that the amount of retention and the like will decrease and foaming will worsen.

  Furthermore, in this invention, it is preferable that 20-40 mass% of the said hydrophobic fibers which comprise the said surface layer and back layer is an acrylic fiber. By containing acrylic fiber, the touch becomes smooth and the physical irritation applied to the skin is reduced. In order to exhibit this effect, it is preferable to contain 20% by mass or more as the total of the surface layer and the back layer as described above. However, acrylic fibers have properties that are relatively close to hydrophilic fibers, and the stiffness becomes weak when immersed in water. Therefore, if there are too many acrylic fibers, it will be difficult to exhibit good resilience for foaming. Therefore, the content is preferably 40% by mass or less as described above.

The surface density of the nonwoven fabric for skin cleaning according to the present invention is preferably 30 to 60 g / m ^{2. If} the surface density is too high, the texture becomes hard, and conversely, if it is too low, the fiber entanglement becomes poor and the fiber This is because there are concerns that many will drop out.

  According to the nonwoven fabric for skin cleaning according to the present invention, foaming is good when it is used for cleaning, and the texture of the foam is fine and the cleaning property is excellent.

  Hereinafter, the non-woven fabric for skin cleaning according to the present invention will be specifically described with reference to the drawings showing examples. However, the present invention is not limited to the illustrated examples, and may conform to the purpose described above and below. It is of course possible to carry out the present invention with appropriate modifications within the scope, and these are all included in the technical scope of the present invention.

  FIG. 1 is a partial sectional view showing a skin cleaning nonwoven fabric 10 according to an embodiment of the present invention, and FIG. 2 is an overall perspective view.

  The skin-cleaning nonwoven fabric 10 is a nonwoven fabric in which a hydrophilic fiber intermediate layer 11 is sandwiched between a hydrophobic fiber surface layer 12 and a hydrophobic fiber back layer 13 and integrated by hydroentanglement. In the drawing, for the sake of convenience, the intermediate layer 11, the surface layer 12, and the back layer 13 are clearly separated, but in the vicinity of these boundary surfaces, the fibers are intermingled by the hydroentanglement and do not exhibit a clear interface. .

The areal density of the non-woven fabric 10 for skin cleaning is 50 g / m ² , and the intermediate layer 11 occupies 60% by mass of the whole and is made of rayon fibers.

  The surface layer 12 and the back layer 13 occupy 20% by mass with respect to the whole (the total of the surface layer 12 and the back layer 13 occupies 40% by mass with respect to the whole). , 70% by mass of split fibers made of polypropylene fibers are contained. As a method for producing the split fibers, composite spinning is performed by arranging polyethylene and polypropylene as in the cross section of a mandarin orange (for example, by arranging polyethylene cylindrical skins and polypropylene by illuminating real parts). Then, using the yarn, the nonwoven fabric 10 is produced by hydroentanglement as described above, and the polyethylene portion and the polypropylene portion are divided by the water pressure at the time of hydroentanglement, and radial fibers (for example, polyethylene fibers) and flat fibers ( For example, polypropylene fiber) is obtained. As the remaining fibers (30% by mass) of the surface layer 12 and the back layer 13, ordinary acrylic fibers having a circular cross section are used.

  In using the non-woven fabric for skin cleaning 10, first, an aqueous cleaning agent and water are included, and the non-woven fabric for cleaning 10 is folded, and the surface layer 12 and the back layer 13 made of hydrophobic fibers are stacked and rubbed together. FIG. 3 is a cross-sectional view illustrating a state in which the skin-cleaning nonwoven fabric 10 is rubbed and foamed. At this time, the water-based cleaning agent and water contained in the intermediate layer 11 ooze out through the surface layer 12 and the back layer 13, and are mixed with air while passing through fine gaps between the divided fibers. Many bubbles are formed. In addition, the cleaning nonwoven fabric 10 does not curl due to the surface layer 12 and the back layer 13 and repels well and foams well.

  In addition, when the skin-cleaning nonwoven fabric 10 is applied to the skin, the surface layer 12 and the back layer 13 contain acrylic fibers, so that the touch is smooth and the skin surface is relatively weak such as the wound surface or the elderly. In contrast, there is little physical stimulation, which is preferable.

  Examples of the hydrophilic fiber of the intermediate layer 11 include cotton (silk), silk, acetate fiber, etc. in addition to the rayon fiber, and when the rayon fiber is used, the entire nonwoven fabric for skin cleaning becomes supple. preferable. Examples of the hydrophobic fibers of the surface layer 12 and the back layer 13 include the above-mentioned polyethylene fibers, polypropylene fibers, acrylic fibers, polyamide fibers, polyester fibers (polyethylene terephthalate fibers, etc.) and the like. The split fibers may be manufactured by selecting two types of raw materials from these hydrophobic fibers.

  In the above embodiment, as the split fibers, the combination of the radial fibers and the flat fibers has been described. However, the present invention is not limited to this, and for example, polyethylene and polypropylene are alternately stacked and compositely spun and pressure is applied thereto. Are added to obtain a flat polyethylene fiber and a polypropylene fiber, and such a divided fiber may be used.

It is a fragmentary sectional view showing the nonwoven fabric for skin washing concerning one embodiment of the present invention. It is a whole perspective view showing the nonwoven fabric for skin washing concerning one embodiment of the present invention. It is sectional drawing showing a mode that the nonwoven fabric for skin washing which concerns on one Embodiment of this invention is rubbed together and foamed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Non-woven fabric for skin washing 11 Hydrophilic fiber intermediate layer 12 Hydrophobic fiber surface layer 13 Hydrophobic fiber back layer

Claims (4)

A three-layer structure in which a hydrophilic fiber intermediate layer is sandwiched between a hydrophobic fiber surface layer and a back layer, each of these layers is a nonwoven fabric for skin cleaning integrated by hydroentanglement,
A non-woven fabric for skin cleaning, wherein 50 to 80% by mass of each of the hydrophobic fibers constituting the surface layer and the back layer is a divided fiber.   The skin cleaning device according to claim 1, wherein the intermediate layer is composed of 30 to 60% by mass and the total of the surface layer and the back layer is 70 to 40% by mass with respect to the entire nonwoven fabric for skin cleaning. Non-woven fabric.   The nonwoven fabric for skin cleaning according to claim 1 or 2, wherein 20 to 40% by mass of the hydrophobic fibers constituting the surface layer and the back layer is an acrylic fiber. Skin cleaning nonwoven fabric according to any one of claims 1 to 3 surface density of the skin cleansing nonwoven is 30 to 60 g / m ^2.

Images