TW201632675A - Wiping sheet - Google Patents

Abstract

Provided is a wiping sheet that comprises a nonwoven fabric containing two kinds of cellulose fiber, and an impregnation liquid that is impregnated within the nonwoven fabric and contains water and ethanol, wherein the number of convexities and concavities of at least 40 [mu]m, as measured by a surface test during wetting under pressure according to the KFX method, is in the range of 10-30, and the basis weight of the nonwoven fabric is 30-100 g/m2. When the wiping sheet is impregnated with a relatively high concentration of a lower alcohol, the wiping sheet exhibits a good liquid-retaining property and has an improved scrubbing feel and tension/springiness.

Description

Wipe sheet

The present invention relates to a wiping sheet comprising a non-woven fabric containing two kinds of cellulose fibers and an impregnation liquid impregnated in the non-woven fabric.

As a wet type non-woven fabric for human body, which is impregnated with liquid, for example, a body wiper for removing facial and body stickiness, dirt, a cleansing tablet for removing makeup, and a face are used. Moisturizing is the mask of the eye. In these applications, the cleansing film and the mask are required to have a good smoothness and a soft feeling. Therefore, in such applications, generally, water using cellulose fibers such as enamel and cotton as the main raw material is used. The needle method is not woven. For example, Japanese Laid-Open Patent Publication No. 2007-177373 (Patent Document 1) discloses a sheet substrate for a wet sheet comprising a water needle nonwoven fabric using two or more kinds of cellulose fibers.

On the other hand, in the body wiping sheet, there is a property that requires tight elasticity in view of the usability when wiping the whole body. Further, from the viewpoint of obtaining a true feeling of wiping, there is a characteristic that a feeling of being strong (a feeling of strength) is required at the time of wiping. As a means of improving the above-mentioned feeling of strength or tightness, it is known that there will be The fibers are bonded to each other by an acrylic adhesive or the like. A non-woven fabric for wet wiping paper, which is a heat-fusible property, is disclosed in Japanese Laid-Open Patent Publication No. 2013-167028 (Patent Document 2). The binder fibers and the specific pulp fibers are three-dimensionally complexed with each other by a high-pressure columnar water flow, and have a fixing portion due to melting of the heat-fusible bonding fibers.

In general, the body immersion liquid of the wiping sheet contains a relatively high concentration of a lower alcohol (mainly ethanol) from the viewpoint of quick-drying feeling and refreshing feeling. Therefore, the adhesive component contained in the non-woven fabric which is the base material of the wiping sheet for the body may be dissolved in the impregnation liquid over time to cause an offensive odor, or the active ingredient contained in the impregnation liquid may be caused (sterilization component, Decomposition of preservatives, etc., sometimes causes problems in terms of stability. Further, there is a case where the dissolution of the adhesive component is accompanied by a decrease in the feeling of firmness or tightness of the body wiping sheet.

Further, it is also known to use a non-woven fabric mainly composed of an olefin-based fiber such as polypropylene to enhance the feeling of strength or tightness of the sheet. However, the use of a non-woven fabric mainly composed of an olefin-based fiber is due to the lack of retention of the impregnation liquid, so that it is immediately dried when the body is wiped, and the wiping sheet for the body has a problem that sufficient wiping property cannot be obtained.

Further, a wet sheet in which a synthetic short fiber and a hydrophilic short fiber are blended to form a fiber in which the fibers are three-dimensionally complexed and which has a specific ratio and which is impregnated with a liquid is also known (for example, Japanese special) Japanese Patent Publication No. 2001-336056 (Patent Document 3)). However, in Patent Document 3, there is no mention of the feeling of strength as described above.

[Previous Technical Literature] [Patent Document]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2007-177373

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2013-167028

[Patent Document 3] Japanese Patent Laid-Open Publication No. 2001-336056

As described above, any of the conventionally known methods for enhancing the feeling of strength or the elasticity of tension is not suitable for use in applications requiring high concentration of lower alcohol and high liquid retention, and has not been obtained for this purpose. Wipe the sheet.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a wiping sheet which has high liquid retainability while being impregnated with a relatively high concentration of a lower alcohol, and which has a strong feeling or a tight elasticity.

The wiping sheet of the present invention is characterized in that it comprises a non-woven fabric comprising two kinds of cellulose fibers, and an impregnation liquid impregnated in the non-woven fabric and containing water and ethanol, and is wetted by a KFX method under pressure. The number of unevenness of 40 μm or more measured is in the range of 10 to 30, and the weight per unit area of the nonwoven fabric is 30 to 100 g/m ² .

The wiping sheet of the present invention does not contain the state of the aforementioned impregnation liquid It is preferable that the interval between the surface irregularities of either or both of the vertical and horizontal sides of the non-woven fabric is 0.5 to 3.5 mm.

The wiping sheet of the present invention is preferably in the range of 20 to 50% as measured by the KFX method in the retention liquid ejection test.

In the wiping sheet of the present invention, one of the two types of cellulose fibers constituting the nonwoven fabric is enamel, and the other is preferably a dissolving fiber (Lyocell).

In the wiping sheet of the present invention, the nonwoven fabric further preferably comprises a heat-fusible fiber. In this case, the nonwoven fabric contains 10 to 80% by weight, 10 to 80% by weight in total of 100% by weight. The soluble fiber of % and the heat-fused fiber of 5 to 30% by weight are more preferable.

In the wiping sheet of the present invention, the non-woven fabric has an apparent density of preferably 0.05 to 0.15 g/cm ³ .

The wiping sheet of the present invention is preferably a wet wiping sheet for human body, and the wiping sheet for wiping the human body is more preferable.

In addition, this specification is a wiping sheet which is a specific embodiment which exhibits the effect of the present invention, and includes a non-woven fabric and an impregnation liquid impregnated into the nonwoven fabric, and the nonwoven fabric is provided in a total amount of 100% by weight. 10 to 80% by weight, 10 to 80% by weight of the soluble fiber and 5 to 30% by weight of the hot-melt fiber, and the above-mentioned non-woven fabric is a spunlace non-woven fabric, and the per-unit area of the non-woven fabric is The weight is 30-100 g/m ² , the fineness of the enthalpy is 2.0-5.0 dtex, the fineness of the soluble fiber is 0.9-3.3 dtex, the fineness of the hot-melt fiber is 1.2-2.2 dtex, and the impregnation liquid contains water. And 30 to 70% by weight of ethanol, and the interval between the surface roughness of either or both of the longitudinal and transverse directions in the non-woven fabric in which the impregnation liquid is not contained is 0.5 to 3.5 mm (hereinafter, sometimes referred to as "the present invention" The wiping sheet of the wiping sheet of the embodiment A is implemented. The wiping sheet of the embodiment A of the present invention is also included in the invention described in the present specification.

In the wiping sheet of the embodiment A of the present invention, the mass ratio of the impregnation liquid is preferably from 250 to 500 parts by weight based on 100 parts by weight of the nonwoven fabric.

The wiping sheet of the embodiment A of the present invention is preferably a wet wiping sheet for human body, and the wiping sheet for wiping the human body is more preferable.

The wiping sheet of the present invention can provide a water needle non-woven fabric using cellulose fibers, and can satisfy the conditions suitable for the impregnation liquid contained in a higher concentration of lower alcohol, having high liquid retention, and giving a feeling of strength or Tightly elastic lifting wipes.

The wiping sheet of the present invention is characterized in that the number of concavities and convexities of 40 μm or more as measured by a surface test in which a non-woven fabric containing two types of cellulose fibers and an impregnation liquid impregnated into a non-woven fabric are wetted under pressure by a KFX method is used. It is in the range of 10 to 30, and the weight per unit area of the nonwoven fabric is 30 to 100 g/m ² . According to the wiping sheet of the present invention having such a property, it is possible to provide a water-needle-free non-woven fabric using cellulose fibers, and it is also suitable for an impregnation liquid which is suitable for a lower-level alcohol contained in a higher concentration, and has high liquid retention property. Conditioning, and a wiping sheet that enhances the strength or tension and elasticity.

In the wiping sheet of the present invention, when the number of concavities and convexities of 40 μm or more measured by the surface test in the KFX method under the above-mentioned KFX method is less than 10, the irritation to the skin is reduced. In addition, when the number of the unevenness of 40 μm or more measured by the surface test in the case of the KFX method under the above-mentioned KFX method is more than 30, the skin is excessively irritated and causes pain. In order to obtain a moderate wiping feeling, it is preferable that the number of concavities and convexities of 40 μm or more measured by a surface test in the case of wetness under pressure by the KFX method is in the range of 15 to 25. In addition, the non-woven fabric having a number of unevenness of 40 μm or more and a number of irregularities of 40 μm or more as measured by a surface test in the KFX method under pressure is set as a fiber composition as detailed in the examples. At the time of manufacture, the interval between the longitudinal and lateral directions or the interval (pattern interval) of the unevenness on both surfaces is appropriately produced by the entanglement treatment of the jet of the high-pressure water stream under the conditions of the range described later.

The nonwoven fabric constituting the wiping sheet of the present invention has a weight per unit area of from 30 to 100 g/m ² , preferably from 40 to 80 g/m ² . When the weight per unit area of the non-woven fabric is less than 30 g/m ² , the shape stability is lowered, and in actual use, the wiping sheet tends to be bent into a circle or the like, and when the weight per unit area of the non-woven fabric exceeds 100 g/m ² . The amount of fiber used in each wiping sheet and the amount of the impregnation liquid are increased to have a tendency to be disadvantageous to the cost surface. The weight per unit area of the nonwoven fabric constituting the wiping sheet of the present invention is a sample having a width of 1 m × a length of 1 m, which is placed in a standard state of 20 ° C and a humidity of 65% in accordance with JIS L1906 for 24 hours. The balance is measured by the weight (g), and the value calculated by rounding off the decimal point of the weight (g).

In the wiping sheet of the present invention, the interval (pitch) (pattern interval) of the unevenness of the surface in either or both of the longitudinal and transverse directions in the non-woven fabric in the state in which the impregnation liquid (dry) is not contained is in the range of 0.5 to 3.5 mm. It is better inside. Here, in the wiping sheet of the present invention, the "longitudinal direction" means the traveling direction of the woven fabric when the non-woven fabric is produced, and the "horizontal direction" means the vertical direction with respect to the longitudinal direction on the same plane. When the interval between the concavities and convexities on the surface of the non-woven fabric in the state where the impregnation liquid is not contained is less than 0.5 mm, the continuity of the concavities and convexities is too high, and it is difficult to obtain a feeling of irritation to the skin, and when it exceeds 3.5 mm, there is a bump. The continuous interval is large, and it becomes difficult to obtain a moderate tendency to stimulate the skin. From the viewpoint of obtaining a more appropriate irritating effect on the skin, the interval between the unevenness of the surface of the non-woven fabric not containing the impregnation liquid is preferably in the range of 1.5 to 2.8 mm.

Further, the wiping sheet of the present invention is preferably in the range of 20 to 50% by the KFX method in the retention liquid discharge test (when the holding liquid is water). The release rate measured by the KFX method in the retention liquid ejection test is in the range of 20 to 50%, and the advantage of obtaining a moderate liquid feeling when wiping is obtained. When the value measured by the KFX method in the holding liquid ejection test is less than 20%, it is difficult to obtain a refreshing feeling when wiping, and the value measured by the KFX method in the holding liquid ejection test is more than 50%. At the time, there is a tendency to cause dripping and it is difficult to handle. The wipe of the present invention is a viewpoint of appropriately discharging the impregnation liquid to impart a refreshing feeling to the skin and no dripping The release sheet is preferably in the range of 25 to 45% by the KFX method in the retention liquid ejection test.

Examples of the cellulose fibers used in the present invention include natural cellulose fibers, regenerated cellulose fibers, purified cellulose fibers, and the like. Specific examples thereof include natural cellulose fibers such as cotton, hemp, wool, and pulp, regenerated cellulose fibers such as enamel, cupra, and purified cellulose fibers such as soluble fibers. Among them, from the viewpoint of liquid absorbing property and form stability of the nonwoven fabric, it is preferred that one of the two types of cellulose fibers constituting the nonwoven fabric is ruthenium, and the other is a soluble fiber. By using these cellulose fibers in combination, and combining any of these cellulose fibers with cellulose fibers other than these, and combining the cellulose fibers other than these, there are The advantages of ease of access, ease of operation, ease of blending, and the like.

The cellulose fibers used in the present invention are not particularly limited in their fineness, but the cellulose fibers (for example, ruthenium) of one of them are preferably in the range of 2.0 to 5.0 dtex, more preferably 3.0 to 4.0. Within the scope of dtex. When the cellulose fiber (for example, ruthenium) of one of them has a fineness of less than 2.0 dtex, there is a tendency to give a proper feeling of unevenness, and in one of the cellulose fibers (for example, ruthenium) When the fineness is more than 5.0 dtex, the unevenness of the wiping sheet is increased, and the irritation to the skin is too strong. Further, among the two kinds of cellulose fibers, the cellulose fibers (e.g., soluble fibers) of the other cellulose fibers are preferably in the range of 0.9 to 3.3 dtex, more preferably in the range of 1.2 to 2.5 dtex. In the other case, the cellulose fiber (for example, the soluble fiber) has a fineness of less than 0.9 dtex. The tendency to reduce the feeling is that when the cellulose fiber (for example, a soluble fiber) of the other has a fineness of more than 3.3 dtex, the skin is too irritating.

The nonwoven fabric constituting the wiping sheet of the present invention further contains a heat-fusible fiber in addition to the above two kinds of cellulose fibers. By further containing the heat-fusible fiber, there is an advantage that the shape stability of the wiper sheet can be improved. The heat-fusible fiber used in the present invention may be a composite fiber such as a core sheath fiber (core sheath type) or a parallel fiber (side by side type) in addition to a single fiber. In particular, since the core-sheath composite fiber is difficult to form a film on the surface of the nonwoven fabric, it is preferable to increase the physical strength while preventing the cellulose fibers on the surface of the nonwoven fabric from being exposed, and to prevent the fibers from falling off during wiping.

Examples of the heat-fusible fiber include a combination of polypropylene (core) and polyethylene (sheath), a combination of polypropylene (core) and ethylene vinyl alcohol (sheath), a high melting point polyester (core) and a low melting point polyester. Combination of (sheath).

The heat-fusible fiber suitable for use in the nonwoven fabric constituting the wiping sheet of the present invention is not particularly limited in terms of the fineness, but is preferably in the range of 1.2 to 2.2 dtex, more preferably in the range of 1.5 to 2.0 dtex. The reason is that when the fineness of the heat-fusible fiber is less than 1.2 dtex, the physical properties of the wipe sheet are not greatly affected, but the passability of the card at the time of fabric formation tends to be lowered, and When the fineness of the fused fiber is more than 2.2 dtex, the form stability tends to decrease by the decrease of the intersection point.

In the nonwoven fabric constituting the wiping sheet of the present invention, the total content of the heat-fusible fiber to the nonwoven fabric is not particularly limited, but it is preferably in the range of 5 to 30% by mass, more preferably in the range of 15 to 25% by mass. When the total content of the non-woven fabric of the heat-fusible fiber is less than 5% by mass, the form stability of the wipe sheet tends to be lowered, and when it exceeds 30% by mass, the liquid retention property tends to be lowered.

More preferably, the non-woven fabric constituting the wiping sheet of the present invention contains 10 to 80% by weight of hydrazine, 10 to 80% by weight of soluble fiber, and 5 to 30% by weight of heat-fusible in a total amount of 100% by weight. Fiber. By containing two types of cellulose fibers and heat-fusible fibers in the amounts within the above ranges, there are advantages in that the liquid retention property and the form stability of the properties required for the obtained wiping sheet can be simultaneously satisfied.

The non-woven fabric constituting the wiping sheet of the present invention may of course contain fibers other than the above-mentioned two types of cellulose fibers and heat-fusible fibers as long as the effects of the present invention are not impaired. Examples of the fiber system include polyester fibers such as polyethylene terephthalate, polybutylene terephthalate, and the like, and polyethylene, polypropylene, and polystyrene. Acrylic fiber such as olefin fiber, polyacrylonitrile or modacrylic acid, polyamine fiber such as Nylon 6, Nylon 66, and Nylon 12, polyvinyl alcohol fiber, polyvinylidene chloride fiber, A synthetic fiber such as a polyvinyl chloride fiber or a urethane fiber, a semi-synthetic fiber such as a triacetate fiber or a diacetate fiber, or the like. The polymer constituting the fibers may be used in the form of a homopolymer, a denatured polymer, a blend, a copolymer or the like.

Further, the nonwoven fabric constituting the wiping sheet of the present invention is not particularly limited in its apparent density, but is preferably in the range of 0.05 to 0.15 g/cm ³ and more preferably in the range of 0.07 to 0.13 g/cm ³ . When the apparent density of the nonwoven fabric is less than 0.05 g/cm ³ , the form stability tends to be lowered, and when the apparent density of the nonwoven fabric is more than 0.15 g/cm ³ , the liquid retention property tends to be lowered. The apparent density of the nonwoven fabric constituting the wiping sheet of the present invention can be calculated from the weight per unit area (g/m ² ) and the thickness (mm) (apparent density of non-woven fabric (g/cm ³ ) = weight per unit area) (g/m ² ) / thickness (mm) / 1000). The thickness of the non-woven fabric can be cut in the MD direction perpendicularly to the surface by using a razor (FEATHER Safety Razor "FEATHER Razor S blade"), and a digital microscope (digital KEYENCE) is used. DIGITAL MICROSCOPE) VHX-900) Measured by observing the cross section of the sample.

The wiping sheet of the present invention is not particularly limited as long as it does not impair the effects of the present invention. That is, it may be a non-woven fabric composed of a single-layer structure, or may have a multilayer structure of two or three layers. When the multilayer structure is formed, the fiber blending layers of the respective layers may be the same or may be modified.

As the nonwoven fabric, various types such as dry water needle non-woven fabric, wet water needle non-woven fabric, air bead nonwoven fabric, air through nonwoven, melt-blown nonwoven, and spunbonded nonwoven fabric can be suitably used. Not woven. Among these non-woven fabrics, a dry water needle non-woven fabric or a wet water needle non-woven fabric is preferable from the viewpoint of the impregnation performance, the holding property, the feeling, and the like of the liquid having biocompatibility.

In the wiping sheet of the present invention, the impregnation liquid contains water and ethanol as essential components. The impregnation liquid further preferably contains a bactericidal component and a cooling component. The impregnation solution may also contain other added ingredients.

The water contained in the impregnation liquid is preferably purified water. The content of the water in the impregnation liquid is not particularly limited, but is preferably 30 to 70% by mass, more preferably 35 to 65% by mass, still more preferably 40 to 60% by mass, based on 100% by mass of the impregnation liquid.

The content of the ethanol in the impregnation liquid is 100% by mass based on the impregnation liquid, preferably 30 to 70% by mass, more preferably 35 to 65% by mass, still more preferably 40 to 60% by mass. When the content is 30% by mass or more, the quick-drying property and the refreshing feeling are improved, and the solubility stability of the cooling component or the sterilizing component is also improved. On the other hand, when the content is more than 70% by mass, an unpleasant sensation due to strong irritating odor of ethanol may occur, and expansion of the impregnation liquid due to heat may occur to cause tightness of the container. influences.

The sterilizing component is not particularly limited, and examples thereof include benzalkonium chloride, benzylammonium chloride, chlorhexidine hydrochloride, phenol, trichlorocarbanilide, and chlorhexidine gluconate ( Chlorhexidine gluconate), isopropylmethylphenol, triclosan, salicylic acid, sorbic acid, lysozyme chloride, and the like. The content of the sterilizing component in the impregnation liquid is not particularly limited, but is preferably 0.05 to 1.0% by mass, and more preferably 0.1 to 0.5% by mass based on 100% by mass of the impregnation liquid.

The cooling component is not particularly limited, but may be enumerated For example, 1-menthol, 1-menthylglyceryl ether, eucalyptol, camphor, menthyl lactate, menthyl salicylate, borneol, and the like. The content of the cooling component in the impregnation liquid is not particularly limited, but is preferably 0.05 to 5.0% by mass, and more preferably 0.1 to 3.0% by mass based on 100% by mass of the impregnation liquid.

The other additive component is not particularly limited, and examples thereof include a moisturizing component such as a polyhydric alcohol, a polyphenol or a plant extract; a sweat component; a deodorizing component; a surfactant; an anti-inflammatory agent; a powder; and an ultraviolet absorber. Clamping agent; perfume; antioxidant; vitamins, animal and plant extracts; pH adjusters; lower alcohols with a carbon number of 3-5.

The polyhydric alcohol is not particularly limited, and examples thereof include ethylene glycol, propylene glycol, isoprene glycol, dipropylene glycol, polyethylene glycol, diethylene glycol, dipropylene glycol, triethylene glycol, and 1,3-butylene. Glycol (1,3-butanediol), 1,2-butanediol, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, 1,2-anthracene Alcohol, glycerin (1,2,3-propanetriol), diglycerin, polyglycerol, sorbitol, maltitol, polyoxyethylene methyl glucoside, polyoxypropylene methyl glucoside, and the like. Among them, preferred are 1,3-butanediol, glycerin, and polyethylene glycol. Polyols increase the moisturizing effect. The number average molecular weight of the polyethylene glycol is not particularly limited, but is preferably from 200 to 30,000, more preferably from 4,000 to 30,000, from the viewpoint of moisturizing effect and sticking inhibition.

The sweating component is not particularly limited, and examples thereof include aluminum chloride, potassium aluminum sulfate, aluminum sulfate, aluminum acetate, chlorohydroxy aluminum, allantochlorochloroaluminum, and p-phenol sulfonate. The content of the sweat component in the impregnation liquid is not particularly limited, but is preferably 0.1 to 10% by mass, and more preferably 0.2 to 5.0% by mass based on 100% by mass of the impregnation liquid.

The deodorant component is not particularly limited, and examples thereof include a metal oxide such as zinc oxide, cerium oxide, alkyldiethanolamine, hydroxyphosphorus lime, a tea extract, and a persimmon extract.

The surfactant is not particularly limited, and examples thereof include a cationic surfactant, an anionic surfactant, a nonionic surfactant, and an amphoteric surfactant. Among them, a nonionic surfactant is preferred. The nonionic surfactant is not particularly limited, and examples thereof include sorbitan fatty acid ester, glycerin fatty acid ester, castor oil, hydrogenated castor oil, and alkylene oxide addition. a polyoxyalkylene alkyl ether, a polyoxyalkylene fatty acid ester, a polyoxyalkylene alkylphenyl ether, and the like. Among them, preferred are alkylene oxide adducts of hydrogenated castor oil and polyoxyalkylene alkyl alkyl ethers. The alkylene oxide adduct of the hydrogenated castor oil may, for example, be polyoxyethylene hydrogenated castor oil. Examples of the polyoxyalkylene alkyl alkyl ethers include polyoxyethylene cetyl ether and polyoxyethylene polyoxypropylene decyltetradecyl ether.

The production method of the impregnation liquid is not particularly limited, and a known production method can be used. For example, a method in which each component is mixed and stirred by a paddle mixer, and each component is homogenized is mentioned.

The wiping sheet of the present invention may contain a conventional additive such as a stabilizer (a thermal stabilizer such as a copper compound, an ultraviolet absorber, a light stabilizer, an antioxidant, etc.) in the nonwoven fabric, without impairing the effects of the present invention. ), fine particles, colorants, fluorescent whitening agents, antistatic agents, flame retardants, deodorants, plasticizers, lubricants, crystallization rate retarders, and the like. These additives may be used singly or in combination of two or more. Such The additive may be included in the fibers constituting the nonwoven fabric or may be supported on the surface of the nonwoven fabric.

The wiping sheet of the present invention is suitable for use as a wet wiping sheet for human body, and is particularly suitable for wiping sheets for wiping human bodies.

Hereinafter, a wiping sheet according to an embodiment A of the present invention which is an example of a specific embodiment of the present invention is shown. The wiping sheet according to the embodiment A of the present invention is an impregnating liquid containing a non-woven fabric and impregnated into the non-woven fabric, and the non-woven fabric is contained in an amount of 10 to 80% by weight in a total amount of 100% by weight.萦, 10 to 80% by weight of the soluble fiber and 5 to 30% by weight of the hot-melt fiber, the non-woven fabric is a water-needle-non-woven fabric, and the weight per unit area of the non-woven fabric is 30 to 100 g/m ² , The fineness is 2.0 to 5.0 dtex, the fineness of the above-mentioned soluble fiber is 0.9 to 3.3 dtex, and the fineness of the above-mentioned hot-melt fiber is 1.2 to 2.2 dtex, and the above-mentioned impregnation liquid contains water and 30 to 70% by weight of ethanol, and does not contain the aforementioned impregnation. A wiping sheet having a surface unevenness of either or both of the longitudinal and lateral directions in the non-woven fabric in the state of the liquid is 0.5 to 3.5 mm. The wiping sheet having such a configuration can exert the effects of the present invention as described above. The wiping sheet of the embodiment A of the present invention is included in the invention described in the present specification independently of the invention of the above-described wiping sheet of the present invention.

In the wiping sheet of the embodiment A of the present invention, the above-mentioned hot-melt fiber may be mentioned as the heat-fusible fiber used in the present invention. The preferred content, fineness, and the like of the enamel, the soluble fiber, and the heat-fusible fiber in the wiping sheet of the embodiment A of the present invention are the same as those of the above-described wiping sheet of the present invention.

That is, the nonwoven fabric constituting the wiping sheet of the embodiment A of the present invention contains 10 to 80% by weight, 10 to 80% by weight of the soluble fiber, and 5 to 30% by weight in a total amount of 100% by weight. % of the heat is fused to the fiber. The content of the above ruthenium is preferably from 15 to 60% by weight, more preferably from 20 to 40% by weight. The content of the above-mentioned soluble fiber is preferably from 20 to 70% by weight, more preferably from 40 to 60% by weight. The content of the above-mentioned hot-melted fiber is preferably from 10 to 25% by weight. Further, the weight per unit area of the wiping sheet of non-woven fabric constituting the embodiment of the present invention A sample of the state of ^{30 ~ 100g / m 2, 40} ~ 80g / m 2 preferred.

Further, in the nonwoven fabric constituting the wiping sheet of the embodiment A of the present invention, the fineness of the crucible is 2.0 to 5.0 dtex, preferably 3.0 to 4.0 dtex. The fineness of the soluble fiber is from 0.9 to 3.3 dtex, preferably from 1.2 to 2.5 dtex. The heat-fused fiber has a fineness of 1.2 to 2.2 dtex, preferably 1.5 to 2.0 dtex.

In the wiping sheet according to the embodiment A of the present invention, the impregnation liquid is used as the impregnation liquid for the present invention, particularly an impregnation liquid containing water and 30 to 70% by weight of ethanol.

The content of the ethanol in the impregnation liquid is preferably from 30 to 70% by mass, more preferably from 35 to 65% by mass, even more preferably from 40 to 60% by mass, based on 100% by weight of the impregnation liquid. Further, the content of the water in the impregnation liquid is preferably from 30 to 70% by mass, more preferably from 35 to 65% by mass, even more preferably from 40 to 60% by mass, based on 100% by weight of the impregnation liquid.

In the wiping sheet of the embodiment A of the present invention, preferably, the mass ratio of the impregnation liquid is 100 parts by weight relative to the nonwoven fabric. 250 to 500 parts by weight, more preferably 270 to 450 parts by weight. The wiping performance or the feeling of use is improved by setting the above mass ratio to 250 parts by weight or more. On the other hand, when the mass ratio is more than 500 parts by weight, the skin may be too moist during wiping, and the feeling of use or quick-drying property may be lowered.

In the wiping sheet of the embodiment A of the present invention, the interval between the surface irregularities of either or both of the longitudinal and transverse directions in the non-woven fabric not containing the impregnation liquid is 0.5 to 3.5 mm, preferably 1.5 to 2.8 mm. .

Hereinafter, the invention will be described in detail by way of examples, but the invention is not limited by the examples. Further, the physical properties of the nonwoven fabric of the present invention mean those measured by the following methods.

[weight per unit area]

According to JIS L1906, the sample was allowed to stand for 24 hours in a standard state of a temperature of 20 ° C and a humidity of 65%, and a sample having a width of 1 m × 1 m in the longitudinal direction was taken, and the weight (g) was measured using a balance. The decimal point of the obtained weight (g) is rounded off to the weight per unit area.

〔thickness〕

Using a razor (FEATHER Safety Razor "FEATHER Razor S Blade"), the sample is cut perpendicular to the surface in the MD direction, and the digital microscope (DIGITAL MICROSCOPE) VHX-900 〕 Observe the cross section of the sample to measure the thickness.

〔Apparent density〕

It is calculated from the weight per unit area (g/m ² ) and the thickness (mm) (apparent density of non-woven fabric (g/cm ³ ) = weight per unit area (g/m ² ) / thickness (mm) / 1000).

[Interval of unevenness on the surface (pattern interval)]

The surface of the sample was observed on a non-woven fabric obtained by a digital microscope (DIGITAL MICROSCOPE VHX-900), and the interval (pitch) of the unevenness on the surface in the longitudinal direction and the lateral direction was measured.

[Fracture strength, elongation at break]

For the obtained non-woven fabric, a constant-speed extension type tensile tester ("AG-IS" manufactured by Shimadzu Corporation) was used, and it was inclined by 45 degrees from the longitudinal direction in accordance with JIS L 1913 "General Nonwoven Test Method" 6.3.2. The cutting was performed, and the tensile strength (N/5 cm) and the elongation (%) of the test piece after the test piece was wetted with an aqueous solution of 50% by mass of ethanol were measured. The temperature of the water immersed in the test piece was set to 20 °C.

[surface unevenness]

Regarding the obtained non-woven fabric, a sheet which was impregnated with an aqueous solution of 50% by mass of ethanol in an amount of 300% by mass based on the weight of the original cloth which was cut into 25 cm (MD) × 20 cm (CD) was placed on the automated surface. The test machine (KES-FB4-AUTO-A, manufactured by KATO TECH Co., Ltd.) was subjected to the measurement of the sample tension (400 g), the load (10 g), and the surface measurement sample moving speed (1 mm/sec). Surface test (KFX method)). Thereafter, the number of unevenness (surface unevenness) of 40 μm or more included in 100 mm was counted.

[Water retention]

The measurement was carried out in accordance with JIS L1907 7.2 water absorption rate. The test piece was cut into 5 cm square to measure the weight (Ag). The test piece was immersed in water for 30 seconds. After the immersion, one of the test pieces was taken out from the liquid, and the weight (Bg) after 1 minute was measured. The fluid retention rate (C%) is based on the following formula C (%) = [(B-A) / A] × 100 to calculate.

[released (water)]

The sheet retained by the above method was twisted at a linear pressure of 0.1 kgf/cm, and the sheet weight (Dg) was measured to obtain a release amount [(B-D)g]. The release rate (E%) is based on the following formula E (%) = [(B-D) / (B-A)] × 100 is calculated.

[Form stability (cantilever erection)]

According to JIS L 1913 6.7.3, the length protruding by the cantilever frame is determined. However, the use of the fabric is cut at a 45 degree direction, and 300% of a sheet impregnated with a 50% by mass aqueous solution of ethanol.

[satisfaction] (1) Production of samples

The obtained non-woven fabric was cut into a longitudinal (non-woven fabric length direction) 10 cm × horizontal (non-woven fabric width direction) 20 cm rectangle, and was placed in a bag made of (polyethylene terephthalate / aluminum / polypropylene laminated sheet) in. Thereafter, the impregnated liquid phase described below was placed in the bag so as to be impregnated into the nonwoven fabric so that 100 parts by weight of the nonwoven fabric was 300 parts by weight of the impregnation liquid. The bag was sealed and allowed to stand in an environment of 25 ° C for 3 days to prepare a sample of a wiping sheet (non-woven fabric impregnated with an impregnation liquid).

<impregnation liquid>

(2) Evaluation

The evaluation was conducted by a dedicated evaluation team of three people. The sample of the above-mentioned wiping sheet was wiped back and forth three times, and the feeling at the time was evaluated by the following criteria.

<Judgement criteria>

5: I feel strongly as a sense of friction, 4: Clearly feel the friction as a sense of strength, 3: I only feel a little sense of friction as a sense of strength, 2: Only feel the soft friction, 1: The friction is weak and the feeling is smooth.

[Example 1]

As a cellulose fiber, a dendritic gel having a fineness of 3.3 dtex (HOPE, manufactured by Omikenshi Co., Ltd.) (hereinafter referred to as "cellulose fiber-1") and a fiber having a fineness of 1.7 dtex (TENCEL ^{(registered trademark)} , Lenzing ^{) were used} . Company-made, dull) (hereinafter referred to as "Cellulose Fiber-2"), this is a heat-fused fiber with a fineness of 1.7 dtex (core is polypropylene, sheath is polyethylene core sheath composite fiber, HR - NTW, manufactured by UBE EXSYMO Co., Ltd.) The cotton was uniformly mixed in a weight ratio of 30:50:20, and a semi-random web was produced by CAD. Thereafter, the carded fabric was placed on a punching drum support having an opening ratio of 25% and a hole diameter of 0.3 mm, and continuously conveyed at a speed of 50 m/min while continuously injecting high-pressure water from above to carry out entanglement. Processing, and making an entangled fiber fabric (non-woven). In this entanglement process, a nozzle 2 having an orifice having a diameter of 0.10 mm (a distance of 20 cm between adjacent nozzles) is provided at intervals of 0.6 mm along the width direction of the fabric, and the nozzles of the first row are ejected from the nozzles of the first column. The water pressure of the high-pressure water stream was set to 6.5 MPa, and the water pressure of the high-pressure water jet ejected from the nozzles of the second row was set to 7.0 MPa (Table WJ).

On the other side, it was placed on a punching drum support with an opening ratio of 25% and a hole diameter of 0.3 mm, and was continuously transferred in the longitudinal direction at a speed of 50 m/min while simultaneously injecting high-pressure water from above for entanglement treatment. Manufacture of woven fiber fabric (non-woven fabric). In this entanglement treatment, a nozzle having an orifice having a diameter of 0.10 mm is provided at intervals of 0.6 mm along the width direction of the fabric, and the water pressure of the high-pressure water jet ejected from the nozzle of the first column is set to 7.0 MPa. Come on (back WJ-1). From the same surface fiber diameter of 0.90mm, mesh 10 (bar/inch), and plain weave are continuously placed on a flat mesh support while continuously transporting high-pressure water flow for entanglement treatment, and meshing The unevenness is transferred to the surface of the non-woven fabric. This entanglement treatment uses three nozzles having orifices having a diameter of 0.10 mm at intervals of 0.6 mm along the width direction of the fabric, either of which is carried out under a water pressure of 6.0 MPa of high pressure water flow (back WJ-2) ). Further, it was dried at 135 °C.

The obtained non-woven fabric was a single layer having a weight per unit area of 44.8 g/m ² , a thickness of 0.37 mm, and an apparent density of 0.12 g/cm ³ . Also, Table 1 shows various evaluation results regarding the obtained non-woven fabric.

[Example 2]

The conditions of the WJ treatment were changed as follows, and the same procedure as in Example 1 was carried out except that the temperature was changed to 5.0 m/min.

(WJ processing)

Table WJ

...3.0MPa-4.0MPa

Back WJ-1

...5.0MPa

Back WJ-2

The non-woven fabric obtained was a single layer having a weight per unit area of 45.3 g/m ² , a thickness of 0.45 mm, and an apparent density of 0.10 g/cm ³ . Table 1 shows the results of various evaluations regarding the obtained non-woven fabric.

[Example 3]

The cellulose fiber-1 and the cellulose fiber-2 and the heat-fusible fiber were mixed at a weight ratio of 80:15:5, and the fiber diameter was 1.20 mm, the mesh was 12 pieces/inch, and the plain weave was used as follows. The WJ treatment was carried out under the same conditions, and the speed was changed to 5.0 m/min, except that the same procedure as in Example 1 was carried out.

(WJ processing)

Table WJ

...3.0MPa-5.0MPa

Back WJ-1

...7.0MPa

Back WJ-2

3.0 MPa - 5.0 MPa - 7.0 MPa The obtained non-woven fabric was a single layer having a weight per unit area of 91.0 g/m ² , a thickness of 0.70 mm, and an apparent density of 0.13 g/cm ³ . Table 1 shows the various evaluation results of the obtained non-woven fabric.

[Example 4]

The cellulose fiber-1 and the cellulose fiber-2 and the heat-fusible fiber were mixed at a weight ratio of 60:20:20, and used as a net (H25) with a fiber diameter of 0.65 mm, a mesh of 25 pieces/inch, and a plain weave. The WJ treatment was carried out under the following conditions, and the speed was set to 5.0 m/min, except that the same procedure as in Example 1 was carried out.

(WJ processing)

Table WJ

...2.0MPa

Back WJ-1

...3.0MPa

Back WJ-2

The nonwoven fabric obtained from 2.0 MPa to 3.0 MPa was a single layer having a weight per unit area of 32.0 g/m ² , a thickness of 0.31 mm, and an apparent density of 0.10 g/cm ³ . Table 1 shows the results of various evaluations regarding the obtained non-woven fabric.

[Example 5]

Cellulose fiber-1 and cellulose fiber-2 with heat-fused fiber The mixing ratio was 20:70:10, and the WJ treatment was carried out under the following conditions, and the speed was set to 5.0 m/min, except that the same procedure as in Example 1 was carried out.

(WJ processing)

Table WJ

...3.0MPa-4.0MPa

Back WJ-1

...5.0MPa

Back WJ-2

The non-woven fabric obtained by the method of 3.0 MPa to 4.0 MPa to 5.0 MPa was a single layer having a weight per unit area of 45.2 g/m ² , a thickness of 0.48 mm, and an apparent density of 0.09 g/cm ³ . Table 1 shows the results of various evaluations regarding the obtained non-woven fabric.

[Comparative Example 1]

Only cellulose fiber-1 was used, and a fiber diameter of 1.00 mm, a mesh size of 6 pieces/inch, and a plain weave were used as a net, and WJ treatment was performed under the following conditions, and the speed was set to 5.0 m/min, in addition to This was carried out in the same manner as in Example 1.

(WJ processing)

Table WJ

...3.0MPa-5.0MPa

Back WJ-1

...7.0MPa

Back WJ-2

The nonwoven fabric obtained was a single layer having a weight per unit area of 24.3 g/m ² , a thickness of 0.24 mm, and an apparent density of 0.10 g/cm ³ . Table 2 shows the results of various evaluations regarding the obtained non-woven fabric.

[Comparative Example 2]

Cellulose fiber-2 and heat-fusible fiber were mixed at a weight ratio of 60:40, and a fiber diameter of 0.20 mm, a mesh of 76 strips/inch, and a plain weave were used as a net, and WJ treatment was carried out under the following conditions, and the speed was measured. Except that the setting was 5.0 m/min, the same procedure as in Example 1 was carried out.

(WJ processing)

Table WJ

...3.0MPa-5.0MPa

Back WJ-1

...7.0MPa

Back WJ-2

The nonwoven fabric obtained was a single layer having a weight per unit area of 118.4 g/m ² , a thickness of 0.85 mm, and an apparent density of 0.14 g/cm ³ . Table 2 shows the results of various evaluations regarding the obtained non-woven fabric.

[Comparative Example 3]

A PET fiber (T471, manufactured by Toray Co., Ltd.) having a fineness of 1.6 dtex was used in the same manner as in Example 1 except that the WJ treatment was carried out under the following conditions and the speed was changed to 5.0 m/min.

(WJ processing)

Table WJ

...3.0MPa-4.0MPa

Back WJ-1

...5.0MPa

Back WJ-2

The non-woven fabric obtained by the method of 3.0 MPa to 4.0 MPa to 5.0 MPa was a single layer having a weight per unit area of 44.3 g/m ² , a thickness of 0.56 mm, and an apparent density of 0.08 g/cm ³ . Table 2 shows the results of various evaluations regarding the obtained non-woven fabric.

[Comparative Example 4]

In the same manner as in Example 1, except that the fiber diameter was 0.20 mm, the mesh size was 76 pieces/inch, and the plain weave, the conditions of the WJ treatment were changed as follows, and the speed was 5.0 m/min.

(WJ processing)

Table WJ

...3.0MPa-4.0MPa

Back WJ-1

...5.0MPa

Back WJ-2

The nonwoven fabric obtained was a single layer having a weight per unit area of 51.3 g/m ² , a thickness of 0.49 mm, and an apparent density of 0.10 g/cm ³ . Table 2 shows the results of various evaluations regarding the obtained non-woven fabric.

[Comparative Example 5]

In the same manner as in the first embodiment, the conditions of the WJ treatment were changed as follows using a fiber diameter of 0.90 mm, 10 strips/inch, and a plain weave.

(WJ processing)

Table WJ

...2.0MPa

Back WJ-1

...3.0MPa

Back WJ-2

The nonwoven fabric obtained from 2.0 MPa to 3.0 MPa was a single layer having a weight per unit area of 26.1 g/m ² , a thickness of 0.25 mm, and an apparent density of 0.10 g/cm ³ . Table 2 shows the results of various evaluations regarding the obtained non-woven fabric.

[Comparative Example 6]

PET spinning adhesive (ELTUS, manufactured by Asahi Kasei Corporation) was used as Comparative Example 6. Table 2 shows the results of various evaluations.

[Comparative Example 7]

A cotton water needle (COTTOACE, manufactured by Unitika Co., Ltd.) produced by the water needle method was used as Comparative Example 7. Table 2 shows the results of various evaluations.

[Comparative Example 8]

Bemliese (Asahi Kasei Co., Ltd.) was used as Comparative Example 8. Table 2 shows the results of various evaluations.

[Comparative Example 9]

Cellulose fiber-1 was used as a slime crucible with a denier of 3.3 dtex, and a viscous crucible of 1.7 dtex (HOPE, manufactured by Omikenshi Co., Ltd.) was used, and the cellulose fiber-1 and the cellulose fiber-2 and the heat-fused fiber were used. The mixture was mixed so that the weight ratio was 60:20:20, and the fiber diameter was 0.65 mm, 25 pieces/inch, and plain weave, and the WJ treatment was performed under the following conditions, and the speed was set to 5.0 m/min. The same procedure as in Example 1 was carried out.

(WJ processing)

Table WJ

...2.0MPa

Back WJ-1

...3.0MPa

Back WJ-2

The nonwoven fabric obtained from 2.0 MPa to 3.0 MPa was a single layer having a weight per unit area of 35.8 g/m ² , a thickness of 0.32 mm, and an apparent density of 0.11 g/cm ³ . Table 2 shows the results of various evaluations regarding the obtained non-woven fabric.

Claims (13)

A wiping sheet comprising a non-woven fabric and an impregnation liquid, wherein the surface roughness of 40 μm or more measured by a surface test by a KFX method is in the range of 10 to 30, and the weight per unit area of the non-woven fabric is of 30 ~ 100g / m ^2, the nonwoven fabric comprising two cellulose fibers, impregnated with the impregnation liquid is non-woven fabric, comprising water and ethanol. The wiping sheet of claim 1, wherein the interval between the surface irregularities of either or both of the longitudinal and transverse directions in the non-woven fabric in which the impregnation liquid is not contained is 0.5 to 3.5 mm. The wiping sheet of claim 1 has a release rate of 20 to 50% as measured by the KFX method. The wiping sheet of claim 1, wherein one of the two types of cellulose fibers constituting the nonwoven fabric is enamel, and the other is a dissolving fiber (Lyocell). The wiping sheet of claim 1, wherein the nonwoven fabric further comprises a heat-fusible fiber. The wiping sheet according to claim 5, wherein the non-woven fabric contains 10 to 80% by weight, 10 to 80% by weight of the soluble fiber, and 5 to 30% by weight of the heat-fused fiber in a total amount of 100% by weight. . The wiping sheet of claim 1, wherein the non-woven fabric has an apparent density of 0.05 to 0.15 g/cm ³ . A wiping sheet according to any one of claims 1 to 7, which is a wet wiping sheet for human use. The wiping sheet of claim 8, which is used for wiping the human body sheet. A wiping sheet comprising a non-woven fabric and an impregnation liquid impregnated into the non-woven fabric, wherein the non-woven fabric is contained in an amount of 10% by weight to 80% by weight, and 10 to 80% by weight of the soluble fiber and 5 ~30% by weight of the heat-fusible fiber, the non-woven fabric is a spunlace nonwoven fabric, the non-woven fabric has a weight per unit area of 30 to 100 g/m ² , and the fineness of the crucible is 2.0 to 5.0 dtex, the solubility The fineness of the fiber is 0.9 to 3.3 dtex, and the fineness of the heat-fusible fiber is 1.2 to 2.2 dtex, and the impregnation liquid contains water and 30 to 70% by weight of ethanol, and is not contained in the non-woven fabric in the state of the impregnation liquid. The interval between the surface irregularities of either or both is 0.5 to 3.5 mm. The wiping sheet of claim 10, wherein the mass ratio of the impregnation liquid is from 250 to 500 parts by weight with respect to 100 parts by weight of the nonwoven fabric. A wiping sheet according to claim 10 or 11, which is a wet wiping sheet for human use. A wiping sheet according to claim 12, which is for wiping a wiping sheet of a human body.