JP2002325698A - Base material for sheet for dry bath - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base material for a sheet for dry bath which has a soft texture, gives an excellent feeling when used, and can be manufactured easily. SOLUTION: The base material for the sheet for dry bath is used by being impregnated with a base agent for dry bath and is made of a non-woven fabric containing 30-90% hydrophilic fiber by weight and 10-70% hydrophobic fiber by weight in a surface layer. The hydrophobic fiber is made of a polyamide fiber or a sheath-core compound fiber which has a polyester resin as a core and a polyamide resin or polybutylene terephthalate as a sheath. The base material for the sheet can contain 100-1000% base agent for dry bath to the weight of the base material for the sheet, and can contain 300% base agent for dry bath. The rate of releasing the base agent for dry bath shows 5-75% under a condition of applying a load of 48 g/cm<2> .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiping base, and more particularly to a personal wiping sheet substrate to be used impregnated with an emulsion base.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. Hei 10-237750 discloses an object of obtaining a nonwoven fabric for a personal wiper which has a soft feel and has no sticky or rough feeling on the surface. Spunlaced nonwoven fabrics comprising hydrophilic fibers, polyester fibers and heat-adhesive fibers are described. In this spunlaced nonwoven fabric, the hydrophilic fibers are arranged so as to be exposed to the human contact surface at 40 to 60% by weight, and the polyester fibers are 20 to 60% by weight.
It contains 50% by weight and 10 to 20% by weight of a heat-adhesive fiber.

[0003] However, this spunlaced nonwoven fabric uses heat-adhesive fibers, which are melted by heat to bond the fibers. Therefore, when wiping the human body, especially a weak part of the skin, it is irritating. (Scratch feeling) is strong and the texture is not good, and the moderate elasticity and the wiping property are not balanced and the usability is not good.

Therefore, the present invention has a soft texture,
An object of the present invention is to provide a wiping sheet substrate which has a good feeling in use and can be easily manufactured.

[0005]

The present invention relates to a wiping sheet substrate which is used by being impregnated with a wiping base, wherein at least the surface layer contains 30 to 90% by weight of hydrophilic fibers and 30% by weight of hydrophobic fibers. The hydrophobic fiber is made of a polyamide-based fiber or a sheath-core composite fiber whose core is made of a polyester-based resin and whose sheath is made of a polyamide-based resin or polybutylene terephthalate. The sheet base is capable of impregnating the wiping base with 100 to 1000% of the weight of the sheet base, and the wiping base is impregnated with 300% and a load of 48 g / cm ² is applied. Release rate of the wiping base under the condition
The above object has been achieved by providing a sheet substrate for wiping which is in%.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on preferred embodiments. The sheet base for wiping of the present invention (hereinafter also simply referred to as sheet base) is preferably used for wiping a person by being impregnated with a wiping base, preferably an emulsion base. The surface layer is composed of a nonwoven fabric containing hydrophilic fibers and hydrophobic fibers at a specific ratio. The sheet substrate of the present invention has a structure capable of impregnating a wiping base as a whole.

Specifically, the sheet substrate of the present invention has at least a surface layer containing 30 to 90% by weight, preferably 50 to 90% by weight, more preferably 60 to 80% by weight of hydrophilic fibers, The fiber contains 10 to 70% by weight, preferably 10 to 50% by weight, more preferably 20 to 40% by weight. Specific fibers are used as the hydrophobic fibers (the specific fibers will be described later). The hydrophilic fiber and the hydrophobic fiber are contained in such a ratio, and by using a specific fiber as the hydrophobic fiber, the feeling of the sheet substrate of the present invention is improved, and the usability at the time of wiping is improved. . More specifically, if the proportion of the hydrophilic fibers is less than 30% by weight, the impregnating property and the holding ability of the wiping base are deteriorated, and if it exceeds 90% by weight, the wiping base is gradually reduced. It is hard to let go. On the other hand, if the ratio of the hydrophobic fiber is less than 10% by weight, the sheet base material does not have an appropriate rigidity (stiffness), and the wiping property at the time of wiping is reduced. If there is, the sheet base becomes hard and the texture deteriorates.

[0008] The sheet substrate of the present invention comprises at least the surface layer of a nonwoven fabric containing hydrophilic fibers and hydrophobic fibers in the above-mentioned ratio. Among them, the low-density, the base for wiping spreads evenly on the skin, the skin feel is good, and the production is easy. Lace nonwoven fabric).
The spunlaced nonwoven fabric is obtained in a conventional manner, for example, by forming a staple fiber through a carding machine to form a web, and subjecting the web to hydroentanglement with a high-pressure jet water stream.

[0009] The sheet substrate of the present invention contains hydrophilic fibers and hydrophobic fibers in the above-described ratio, and the specific fibers are used as the hydrophobic fibers. ~ 1000%, preferably 200 ~ 80
It has an impregnation capacity capable of impregnating 0%, more preferably 200-500% of the wiping base. 100% impregnation capacity
If the amount is less than the above, the cleaning property of the dirt is not sufficient, and if the amount exceeds 1000%, the holding of the wiping base becomes difficult and the wiping base becomes easily sticky to the hand.

Furthermore, the sheet substrate of the present invention contains hydrophilic fibers and hydrophobic fibers in the above-mentioned ratio, and the specific fibers are used as the hydrophobic fibers, so that the wiping base is 300%. The release rate of the wiping base under the condition of being impregnated and applying a load of 48 g / cm ² is 5 to 75%, preferably 6 to 60%, more preferably 7 to 50%. If the release rate is less than 5%, the amount of the wiping base released from the sheet substrate is not sufficient, and the dirt cannot be sufficiently removed, and if it exceeds 75%, the dirt spreads conversely. The wiping base released from the sheet substrate dissolves skin stains and is then sucked back into the sheet substrate. This removes skin stains. The reason for measuring the release rate under the condition of applying a load of 48 g / cm ² is that the load is a general load applied to the sheet when a person wipes the skin with the sheet.

The release rate is measured in the following manner. 50mm
A sheet base having a size of 100 mm is impregnated with 300% of a wiping base with respect to the weight of the sheet base. The weight of the impregnated wiping base is referred to as a liquid amount A. Next, the sheet substrate is folded in half to a size of 50 mm × 50 mm, and the whole is wrapped with a Kim Towel (trade name) manufactured by Crecia Corporation whose weight has been measured in advance. Next, a 50 mm × 50 mm acrylic plate is placed on a sheet base material wrapped with a Kim towel, and a weight is placed thereon to apply a total load of 1200 g (= 48 g / cm ² ). After loading for 1 minute, the weight and acrylic plate are removed, and the Kim towel is weighed again. A difference is obtained by subtracting the previously measured weight of the Kim towel from the measured weight of the Kim towel. The release rate (%) is calculated by dividing the obtained difference by the previously measured value of the liquid amount A and multiplying by 100.

The sheet base material of the present invention has a bulk softness at the time of drying (before impregnation) of preferably 0.05 to 1 N, more preferably 0.05 to 0.75 N in both the flow direction and the width direction. , More preferably 0.05 to
0.5N. By setting the bulk softness in such a range and the ratio of the hydrophilic fiber and the hydrophobic fiber in the above range, the texture of the sheet substrate of the present invention is further improved, and the feeling of use during wiping is improved. Further improve. In detail, if the bulk softness is less than 0.05 N, the sheet base material becomes too soft, and the wiping property at the time of wiping is reduced. If the bulk softness is more than 1 N, the sheet base material becomes too hard, resulting in poor touch. . Further, by setting the bulk softness within the above range in any of the flow direction and the width direction of the sheet base material, a soft feel can be obtained even when the sheet base material is wiped in any direction. Here, the flow direction refers to the machine direction during the production of the nonwoven fabric constituting the surface layer of the sheet substrate of the present invention, and the width direction refers to a direction orthogonal to the flow direction.

With respect to bulk softness, the sheet substrate of the present invention has a bulk softness value B _MD in the flow direction.
There is no particular limitation on the magnitude relationship between the value and the bulk softness value B _CD in the width direction, but B _MD / B _CD = 0.9 to 1.
4, especially 1.0 to 1.3, is preferable because wiping properties and feel are good no matter in which direction, for example, wiping is performed in an oblique direction.

In order to make the bulk softness of the sheet base material of the present invention within the above range, for example, when the surface layer of the sheet base material is formed of a spunlace nonwoven fabric, the water pressure of the high-pressure jet water flow during the production of the spunlace nonwoven fabric is adjusted. You can set it lower.

[0015] Bulk softness is measured by the following method. The bulk softness in the flow direction is obtained by cutting a sheet substrate into a size of 30 mm in the flow direction and 150 mm in the width direction to obtain a rectangular test piece. From this test piece, a diameter 45 having the short side direction (30 mm direction) as the height direction.
Make a mm cylinder. The overlap width of the cylinder in the circumferential direction is about 10
mm. The upper and lower ends of the overlapped portion are fixed with a MAX stapler HD-10D, needle No. 10-1M.
The maximum load when the cylindrical measurement sample thus obtained is compressed in the height direction of the cylinder is measured by a compression tester, and the value is defined as the value of bulk softness in the flow direction. The compression tester is R manufactured by Orientec Co., Ltd.
TA-100 type (trade name) was used. Compression speed is 10m
m / min. On the other hand, the bulk softness in the width direction is 30 mm in the width direction and 1 mm in the flow direction.
Cut to a size of 50mm, take a rectangular test piece,
The measurement is performed in the same manner as described above.

The coefficient of friction of the sheet substrate of the present invention when dried (before impregnation) is preferably 0.10 to 0.19, more preferably 0.11 to 0.19, in both the flow direction and the width direction. 19, more preferably 0.13 to 0.1
It is 8. By setting the coefficient of friction in such a range, when the sheet substrate of the present invention is used for wiping the skin, the irritating feeling (stinginess) on the skin is reduced, and the feeling is improved. More specifically, if the friction coefficient is less than 0.10, the friction resistance becomes too small, and the cleaning property against dirt is reduced. If it exceeds 0.19, the feeling of irritation caused by the increase in the friction resistance becomes strong. Further, by setting the coefficient of friction within the above range in both the flow direction and the width direction of the sheet substrate, the sensation of irritation is small and the feel is good even when wiping in any direction.

With respect to the coefficient of friction, the sheet substrate of the present invention comprises:
Friction coefficient μ in the flow direction_MDAnd in the width direction
Friction coefficient μ_CDThere is no particular limitation on the magnitude relationship between_MD
/ Μ _CD= 0.7-1.2, especially 0.8-1.1
Cleaning in any direction, for example, diagonally
It is preferable because it has good cleanability and low irritation.

In order to keep the coefficient of friction of the sheet substrate of the present invention within the above range, for example, when the surface layer of the sheet substrate is made of a spunlace nonwoven fabric, the water pressure of the high-pressure jet water flow during the production of the spunlace nonwoven fabric is appropriately adjusted. Adjust it.

The coefficient of friction is measured by the KES method. The sheet base material was set on a KES-SE measuring machine manufactured by Kato Tech Co., Ltd., and the surface of the sheet base material was slid at a speed of 1 mm / s under a contact force of 50 gf with a piano wire having a diameter of 0.5 mm to obtain surface characteristics. Measure, determine coefficient of friction μ and average for N = 3. For details of the KES method, see Toshio Kawabata, The Japan Textile Machine Society, Lightweight and Standardization Research Committee (Showa 5)
(July 10, 2010) "Standardization and Analysis of Texture Evaluation (Second Edition)".

Next, the hydrophobic fibers and the hydrophilic fibers will be described. As described above, the hydrophobic fiber is made of a polyamide fiber or a core-sheath type composite fiber whose core is made of a polyester resin and whose sheath is made of a polyamide resin or polybutylene terephthalate (PBT). These fibers are suitable as constituent fibers of a sheet substrate for wiping, since they have high flexibility and good elasticity even if they are thick. The hydrophobic fibers may have an irregular cross section. When the hydrophobic fiber is a core-sheath type composite fiber, polyethylene terephthalate (PET) is preferable as the polyester resin of the core constituting the composite fiber. Examples of the polyamide resin constituting the hydrophobic fiber include a resin (polyamide 6) obtained by ring-opening polymerization of ε-caprolactam,
A resin (polyamide 66) obtained by polycondensation of hexamethylenediamine and adipic acid can be used. As the hydrophobic fiber, it is preferable to use a PET / PBT core-in-sheath type composite fiber having a PET core and a PBT sheath from the viewpoint that the flexibility is particularly high even if it is thick. Among them, it is preferable to use PET / PBT core-sheath type composite fibers having a crimp rate of 10 to 15% from the viewpoint of productivity and wiping properties. Most preferably, all of the hydrophobic fibers are composed of the above-mentioned fibers, but it is permissible that other types of hydrophobic fibers are contained in small amounts as long as the effects of the present invention are not impaired.

The fineness of the hydrophobic fiber is 0.55 to 6.6.
It is preferably decitex, and particularly when it is made of polyamide fiber, 0.99 to 4.4 decitex,
When the core-sheath type composite fiber is used, it is preferably from 1.1 to 5.5 decitex. If the fineness is less than 0.55 dtex, for example, the cardability may be reduced and the production of the sheet substrate may become difficult. If the fineness exceeds 6.6 dtex, the sheet substrate may be hardened and the feel may be poor. In this case, it is most preferable that all the hydrophobic fibers satisfy the fineness in the above range. However, if at least 10% by weight or more, particularly 30% by weight or more of the hydrophobic fibers satisfies the fineness in the above range, the effect of the present invention will be reduced. Played enough.

The length of the hydrophobic fiber is not particularly limited, and an appropriate length is used depending on the method of manufacturing the sheet substrate.

As the hydrophilic fibers, cellulose fibers such as cellulose, rayon and cotton, and fibers obtained by subjecting hydrophobic fibers to a hydrophilic treatment are used. In particular, it is preferable to use cellulosic fibers, especially rayon, from the viewpoint of good skin feel and water retention. These fibers can be used alone or in combination of two or more.

The sheet substrate of the present invention may have a single-layer structure or a multilayer structure. In the case of a single layer, the sheet substrate is composed of a nonwoven fabric, and the ratio of hydrophilic fibers to hydrophobic fibers in the nonwoven fabric is as described above. In the case of a multilayer, at least one surface layer of the sheet substrate is formed of a nonwoven fabric, and the ratio of hydrophilic fibers to hydrophobic fibers in the nonwoven fabric is as described above. The portion of the sheet substrate other than the surface layer may be a nonwoven fabric or another sheet material having a structure capable of impregnating and holding a wiping base. In this case, the surface layer and the portion other than the surface layer are joined and integrated by a predetermined means, for example, a joining means such as embossing, a binder, fiber entanglement, and stitching.

When the sheet substrate of the present invention has a single-layer structure,
If the basis weight is 20-120 g / m ^Two, Especially 30 to 10
0 g / m^TwoIs the shape retention, flexibility and operability
From the point of view, the thickness is preferably 0.1 to 4 mm, particularly 0.1 mm.
2 to 3 mm in terms of usability and portability
preferable. The thickness is 3.7 g / cm^TwoMeasured under load
Value.

On the other hand, when the sheet base material of the present invention has a multilayer structure, the basis weight of the surface layer in which the ratio of the hydrophilic fibers to the hydrophobic fibers is as described above is 20 to 110 g / m ² , especially 25.
It is preferably from 100 to 100 g / m ² from the viewpoint of shape retention, flexibility and operability, and the thickness is 0.05 to 3.5 mm.
In particular, it is preferable that the thickness is 0.15 to 3.0 mm in terms of usability and portability. The basis weight and thickness of the portion other than the surface layer may be appropriately adjusted so that the basis weight and thickness of the entire sheet base material are the same as in the case of the above-described single-layer structure.

[0027] The wiping base of the sheet substrate should have at least a fiber-to-fiber distance of 10 to 500 µm, especially 15 to 300 µm in the surface layer in which the ratio of hydrophilic fiber to hydrophobic fiber is as described above. Is preferred from the viewpoints of impregnation, release, and spreadability on the skin. It is also preferable from the viewpoint of preventing the wiping base from being separated into oil and moisture, which tends to occur when the distance between fibers is small. The distance Dp between fibers is
It is measured by the following method. The thickness of the surface layer is y (m),
The basis weight of the surface layer is (g / m ² ), and the fineness of the constituent fibers is F
(Decitex), assuming that the diameter of the constituent fibers is fd (μm), the inter-fiber distance Dp is Dp = 0.015 × √ (Fy /
1.1a) Calculated as -fd. The thickness y of the surface layer is
3.7 for sheet material of 100 mm x 100 mm size
It is measured using a model PF-11 manufactured by Tekrock under the condition of applying a load of g / cm ² . The measurement is performed on five sheet substrates, and the average value is determined. The diameter fd of the constituent fibers is measured from an enlarged photograph of the fibers taken using a scanning electron microscope, and the average value of five samples is determined. The fineness F is determined by using a differential scanning calorimeter to specify the type of fiber, examining the density ρ (g / m ³ ) of the specified fiber, and F = π (f
d / 2) ² × 9000ρ × 1.1 When the sheet base has a single-layer structure, the thickness and the basis weight of the surface layer are read as the thickness and the basis weight of the entire sheet base, respectively.

The sheet substrate has a density of 0.01 to 0.2 g / cm ³ , especially 0.03 to 0.2 g / cm ³ , at least in the surface layer in which the ratio of the hydrophilic fiber to the hydrophobic fiber is as described above.
It is preferably 0.15 g / cm ³ from the viewpoint that the impregnating property, release property and spreadability of the wiping base, particularly the emulsion base, are improved. The density is calculated from the basis weight and the thickness of the surface layer. When the sheet substrate has a single-layer structure, the density refers to the density of the entire sheet substrate.

The wiping base impregnated in the sheet substrate of the present invention includes an emulsion base, an aqueous base, an oil base and the like. When an emulsion base is used as the wiping base, various emulsions containing an oil agent and water can be used as the emulsion base, and any of a W / O type and an O / W type can be used. May be. Specific examples of the emulsion base include a skin care cream, an ultraviolet protection cream, a detergent, an emulsion, and a makeup remover. In particular, an emulsion containing an oil agent, water and a surfactant is preferable because it has high stability and does not have a sticky feeling.

When an emulsion base is used as the wiping base, the amount of the oil agent in the emulsion base is as follows:
It is preferably from 10 to 80% by weight, particularly preferably from 20 to 70% by weight. The amount of water is 10-80% by weight, in particular 20-7
It is preferably 0% by weight. The amount of surfactant is
It is preferably from 0.5 to 10% by weight, particularly preferably from 0.5 to 5% by weight.

Oils include hydrocarbons such as liquid paraffin, higher alcohols such as stearyl alcohol, fatty acids such as oleic acid, dialkyl ethers such as isostearyl octyl ether, fatty acid esters such as isopropyl myristate, and fatty acids. Triglycerides,
Silicones such as dimethylpolysiloxane having a low polymerization chain are exemplified. Examples of the surfactant include a nonionic surfactant such as a polyoxyethylene alkyl ether, an anionic surfactant such as an alkyl sulfate, and an amphoteric surfactant such as carbobetaine.

The emulsion base may contain an aqueous thickener such as carrageenan and an oily thickener such as carnauba wax. When the emulsion base is an emulsion cosmetic, various additives such as a solvent and a humectant generally used in cosmetics can be blended as required.

The viscosity of the emulsion base is 0.1 at 25 ° C.
2 to 4 Pa · s, particularly 0.5 to 3 Pa · s;
0.1 to 2 Pa · s at 0 ° C, especially 0.1 to 1.2 Pa · s
Is preferable because the impregnation property of the sheet base material is good.

The wiping base can be impregnated into the sheet substrate of the present invention using a coating device such as a gravure coater or a die coater. Alternatively, impregnation can be performed by leaving the coating for a sufficient time after spray application.

[0035]

EXAMPLES In the following examples, "%" and "parts" mean "% by weight" and "parts by weight", respectively, unless otherwise specified.

Example 1 Rayon fiber (fineness 1.65)
Decitex) and 70% and 30% PET / PBT core-sheath composite fibers (fineness 1.65 decitex), respectively.
At a rate of 100% and made into a web using a card machine. The web was hydroentangled to obtain a sheet substrate made of a spunlaced nonwoven fabric. The basis weight was 70 g / m ² .

A cleansing emulsion cosmetic (W / O emulsion) having the following composition was prepared by a conventional method. The obtained emulsion cosmetic was prepared at 25 ° C and 50 ° C.
1.5Pa · s and 0.6P respectively
a · s. The obtained emulsion cosmetic was applied and impregnated on a sheet substrate using a gravure coater. The impregnation amount was 300% of the weight of the sheet base material.

Liquid paraffin 30 parts Methylcyclopolysiloxane 10 parts Cetyl-1,3-dibutyl ether 10 parts Polyoxyethylene sorbitan monostearate (20EO) 2 parts Isostearyl glyceryl ether 0.5 parts Glycerin 5 parts Xanthan gum 0.5 parts Dextrin palmitate 3 parts Aluminum dialkyl phosphate 1 part Methyl paraben 0.1 part Propyl paraben 0.1 part Purified water balance

Example 2 Rayon fiber (fineness 1.65)
(Decitex) and nylon (fineness: 3.3 decitex) were mixed at a ratio of 80% and 20%, respectively, and the mixture was carded to form a web. The web was hydroentangled to obtain a sheet substrate made of a spunlaced nonwoven fabric. The basis weight was 70 g / m ² . Thereafter, in the same manner as in Example 1, the emulsion base material was applied and impregnated on the sheet substrate. The impregnation amount was 300% of the weight of the sheet base material.

Comparative Example 1 Rayon fiber (fineness 1.65)
Decitex) and PP / PP fiber (fineness 3.3 decitex) at a ratio of 70% and 30%, respectively.
I made it on a card machine. The web was hydroentangled to obtain a sheet substrate made of a spunlaced nonwoven fabric. The basis weight was 70 g / m ² . Thereafter, in the same manner as in Example 1, the emulsion base material was applied and impregnated on the sheet substrate. The impregnation amount was 300% of the weight of the sheet base material.

[Comparative Example 2] Rayon fiber (fineness 1.65)
(Decitex) and PET / PE fiber (fineness: 2.2 decitex) were mixed at a ratio of 60% and 40%, respectively, and the resulting mixture was carded into a web. The web was hydroentangled to obtain a sheet substrate made of a spunlaced nonwoven fabric. The basis weight was 60 g / m ² . After this, Example 1
In the same manner as in the above, the emulsion cosmetic was applied to and impregnated on the sheet substrate. The impregnation amount was 300% of the weight of the sheet base material.

[Evaluation of Performance] With respect to the sheet base materials obtained in Examples and Comparative Examples, the impregnating capacity and the release rate of the wiping base, the bulk softness and the friction coefficient were measured by the methods described above. The feel, the impregnation of the emulsion base, and the wiping properties of the sheet base impregnated with the emulsion base were evaluated by the method. The results are shown in Table 1 below.

[Feeling of Sheet Substrate] The sheet substrate was touched by five panelists, and the feeling at that time was evaluated according to the following criteria, and judged by the average score. Good: 3 points Average: 2 points Bad: 1 point

[Impregnating property of emulsion base] 5 cm × 1
The ease of impregnation when 1.1 g of the emulsion cosmetic was impregnated into a 0 cm sheet substrate was evaluated according to the following criteria. Easy to impregnate ... ○ Normal ・ ・ ・ ・ ・ ・ ・ △ Difficult to impregnate ・ ×

[Wipeability of Sheet Base Impregnated with Emulsion Base] As a model of oily stain, Maybelline Dial Mascara Black manufactured by Maybelline was used. About 20 mg of this mascara was applied to a circle having a radius of about 2 cm on a slide glass, and allowed to stand overnight to dry. Then, a control slide glass was placed on white paper, and the chromaticity (E ₀ ) of the blank was determined with a dye meter. Similarly, the chromaticity (E ₁ ) of the slide glass coated with mascara was determined. Mascara was wiped 10 times using the sheet base impregnated with the emulsion base. The chromaticity (E ₂ ) was determined again, and the cleaning rate (%) as a measure of the wiping performance was determined according to the following equation. The closer the value of the cleaning rate is to 100, the better the wiping property is. Washing rate (%) = (1− (E ₀ −E ₂ ) / (E ₀ −E ₁ )) ×
100

[0046]

[Table 1]

As is clear from the results shown in Table 1, the sheet base materials of the examples (products of the present invention) have a good feel, a good impregnation of the emulsion base, and a good wiping property. It turns out that there is.

[0048]

The wiping sheet substrate of the present invention has a soft texture and a good feeling of use. Further, the sheet substrate for wiping of the present invention can be easily manufactured and is economical.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Machiko Yokoyama 1-14-10 Nihonbashi Kayabacho, Chuo-ku, Tokyo Kao Corporation F term (reference) 4L047 AA12 AA21 AA23 AA27 AA28 AB10 BA04 CB10 CC16 DA00

Claims (5)

[Claims] 1. A wiping sheet substrate which is used by being impregnated with a wiping base, wherein at least the surface layer contains 30 to 90% by weight of a hydrophilic fiber and 10 to 70% by weight of a hydrophobic fiber. Comprising a nonwoven fabric containing, the hydrophobic fiber is a polyamide-based fiber or a core-in-sheath composite fiber whose core is a polyester-based resin and the sheath is a polyamide-based resin or polybutylene terephthalate, and the sheet base material is The wiping base is used in an amount of 100 to 1000% by weight of the sheet substrate.
Wiping that can be impregnated at a rate of 5 to 75% when the wiping base is impregnated with 300% of the wiping base and a load of 48 g / cm ² is applied. Sheet base material. 2. The fineness of the hydrophobic fiber is 0.55-6.
The wiping sheet substrate according to claim 1, which is 6 dtex. 3. The sheet substrate for wiping according to claim 1, wherein the hydrophobic fiber is a core-sheath composite fiber whose core is made of polyethylene terephthalate and whose sheath is made of polybutylene terephthalate. 4. The wiping sheet substrate according to claim 1, wherein the wiping base comprises an emulsion base, and the nonwoven fabric comprises a spunlaced nonwoven fabric. 5. The bulk softness in the flow direction and the width direction is 0.05 to 1N, and the friction coefficient in the flow direction and the width direction is 0.10 to 0.19.
A sheet substrate for wiping according to any one of the above.