JP3270930B2 - Method for modifying one side of woven or knitted fabric or nonwoven fabric and woven or knitted fabric or nonwoven fabric having one surface modified - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for modifying one side of a woven or knitted fabric or nonwoven fabric and a woven or knitted fabric or nonwoven fabric having one surface modified.

[0002]

2. Description of the Prior Art Water is constantly evaporating from the human skin in normal times due to body temperature regulation and physiological sweating functions. However, when intense sports are performed, the amount of sweating is reduced to prevent a sudden rise in body temperature. Increase.

[0003] Therefore, during intense sports, the humidity in the space inside the clothes also rises, and when the temperature rises to 33 ° C and the humidity becomes 65% or more, sweat reaching the body surface from the sweat line cannot be gasified, and liquid phase sweating starts. Have been done.

[0004] Originally, the increase in the amount of perspiration has the function of lowering the body temperature that rises due to the heat of vaporization. However, if sweat remains on the skin surface or is retained on the clothing surface in contact with the skin, the heat of vaporization causes Thermoregulation stops working effectively,
The temperature in the clothes and the amount of perspiration increase more and more.

Conversely, when the body temperature begins to drop after exercise, if sweat on the body surface or sweat on the clothing surface in contact with the skin is vaporized, they cause a feeling of cooling.

[0006] At the time of such exercise or after exercise, the feeling of "humidity"
In order to eliminate the discomfort such as <stickiness> and <coolness>, clothes having physical properties capable of quickly absorbing sweat on the body surface and quickly releasing the sweat from the portion in contact with the skin to the external environment are required. The same can be said for not only sports clothing but also underwear and underwear that adhere to the skin.

[0007] From this viewpoint, when a conventional fiber material is evaluated, a fiber material made of 100% natural fiber such as cotton and wool absorbs sweat well because of its excellent water absorbency, but once it is also excellent in water retention, The sweat that is absorbed does not evaporate easily, leaving considerable moisture inside the fibers, which takes time to dry. On the other hand, a fiber material made of 100% synthetic fiber has a low water absorption rate when in contact with water and is inferior in water permeability, so that sweat is not absorbed or moved, which causes discomfort due to sweat wetting.

[0008] Even blended products of natural fibers and synthetic fibers have the drawback that sweat (moisture) is not easily evaporated because the absorbed sweat is absorbed by the natural fibers and is protected from water.

In order to solve these drawbacks, there has been proposed a fabric in which one surface is hydrophobic and the other surface is hydrophilic.

Here, FIG. 1 is a model diagram showing the water absorption and water permeability of a woven / knitted fabric having both sides hydrophobic, a woven / knitted fabric having both surfaces hydrophilic, and a woven / knitted fabric having one surface hydrophobic and another surface being hydrophilic. Is shown.

In a hydrophobic woven or knitted fabric such as a fiber material made of 100% synthetic fibers, the moisture permeable layer does not reach the outside as shown in the model diagram (A) of FIG. Woven and knitted fabrics with hydrophilic surfaces on both sides, such as fiber material made of 100% natural fiber, have a moisture permeable layer that reaches to the outside as shown in the model diagram (B), but the spread of the moisture permeable layer on the inside and outside is uniform . A woven or knitted fabric having both a hydrophilic surface and a hydrophobic surface shows an expansion from the hydrophobic surface moisture permeable layer to the hydrophilic surface moisture permeable layer as shown in (C).

As described above, the behavior with respect to sweat that is truly required in a woven or knitted fabric used for sports clothing, underwear, underwear, or the like is not to include sweat inside the woven or knitted fabric, but rather to include water in the woven or knitted fabric. It is important to move from the hydrophobic surface in contact with the skin side to the hydrophilic surface which is always in contact with the outside air, and to diffuse and dissipate sweat to the surface layer. A cloth having water absorption and water permeability as shown in FIG. 1 (C), that is, a cloth whose one surface is hydrophobic and whose other surface is hydrophilic can achieve such a behavior.

Accordingly, various methods have been proposed for obtaining a woven or knitted material having one surface which is a hydrophobic surface and another surface which is a hydrophilic surface. It is known that a woven or knitted fabric which does not generate a stuffy feeling, a sticky feeling, or the like can be easily produced by a post-processing method of applying a varnish.
However, the woven or knitted fabric obtained by such a processing method has disadvantages such as poor washing resistance due to the mere application of a chemical, and poor porosity due to clogging of the woven or knitted fabric by the applied chemical.

[0014]

SUMMARY OF THE INVENTION An object of the present invention is to provide a single-sided method for obtaining a woven or knitted fabric or a non-woven fabric free from the above-mentioned disadvantages, and a woven or knitted fabric or a non-woven fabric free from the above-mentioned defects.

[0015]

Means for Solving the Problems As a result of intensive studies, the present inventors have applied a paste on one side as a plasma reaction preventing layer to one side of a woven or knitted fabric or a non-woven fabric before performing a plasma treatment.
The present inventors have found that the above object can be achieved by performing plasma treatment in an atmosphere containing a fluorocarbon, and completed the present invention.

That is, the present invention provides the inventions according to the following items.

Item 1 A paste is applied to one surface of a hydrophilic woven or knitted fabric or nonwoven fabric, and the other surface of the woven or knitted fabric or nonwoven fabric is subjected to plasma treatment in an atmosphere containing at least one kind of fluorocarbon, and then the paste is removed. A method for modifying one side of a woven or knitted fabric or a nonwoven fabric.

Item 2. The method according to Item 1, wherein a glue is applied to one side of the woven or knitted fabric or the nonwoven fabric.

Item 3. The method according to Item 1, wherein a paste is partially applied to one surface of the woven or knitted fabric or the nonwoven fabric.

Item 4. The method according to any one of Items 1 to 3, wherein the sizing agent is a water-soluble sizing agent.

Item 5. The thickness of the paste after drying is 40 to 60 μm.
Item 5. The method according to any one of Items 1 to 4, wherein the glue is applied in such an amount as to give m.

Item 6. A hydrophilic woven or knitted fabric or nonwoven fabric plasma-treated with at least one kind of fluorocarbon, having a water absorption rate of 10 seconds or less on one side and 200 seconds or more on the other side according to the JISL 1096A method. A woven or knitted fabric or a nonwoven fabric.

Item 7: A hydrophilic woven or knitted fabric or nonwoven fabric plasma-treated using at least one kind of fluorocarbon, wherein the number of fluorine atoms present on one side is 4 times the number of fluorine atoms present on the other side. A woven or knitted fabric or a nonwoven fabric characterized by being at least twice as large.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

The method for processing a woven or knitted fabric or a nonwoven fabric according to the present invention comprises three steps, as shown in FIG. The first step is a step of applying a paste as a plasma reaction preventing layer to one surface of the woven or knitted fabric or the nonwoven fabric; the second step is the other surface of the woven or knitted fabric or the nonwoven fabric by plasma treatment in an atmosphere containing fluorocarbon The third step is a step of removing a paste or the like applied to one surface of the woven or knitted fabric or the nonwoven fabric.

[First Step] In the first step of coating and laying, a sizing agent is applied as a plasma reaction preventing layer to one surface of the woven or knitted fabric or the nonwoven fabric.

The woven or knitted fabric or non-woven fabric to which the present invention is directed is:
A hydrophilic fiber or a blend of a hydrophilic fiber and a hydrophobic fiber.

In this specification, the water absorption rate according to the JISL 1096A method (hereinafter sometimes simply referred to as “water absorption rate”) is 10
Seconds or less should be hydrophilic woven or knitted or non-woven fabric, JISL 1
Those having a water absorption rate of about 200 seconds or more according to the 096A method are referred to as hydrophobic woven or knitted fabrics or nonwoven fabrics. The hydrophilic woven or knitted fabric or nonwoven fabric used in the present invention preferably has a water absorption rate of about 5 seconds or less, more preferably about 1 second or less,
As a hydrophobic woven or knitted fabric or nonwoven fabric, the water absorption rate is 300
Those having a duration of about 2 seconds or more are preferable.

Examples of the hydrophilic fiber include cotton, hemp, silk, wool and the like.

As the hydrophilic fiber, a material obtained by hydrophilizing a hydrophobic fiber by a known method, such as a hydrophilic polyester, can be used.

Examples of the hydrophobic fiber used as a blend with the hydrophilic fiber include polyester, polypropylene, polyamide, polyacrylonitrile, and polypropylene synthetic fibers. More specifically, a blend of cotton and polyester is exemplified.

The thickness of these fibers is not particularly limited, but is usually about 15 to 400 denier.

The basis weight and thickness of the woven or knitted fabric or the nonwoven fabric are not particularly limited, but are usually 30 to 5 respectively.
It is about 00 g / m ^{2 and} about 50 to 1,000 μm.

The sizing agent used as the plasma reaction preventing layer in the present invention is not particularly limited as long as the coated surface is not fluorinated by the second-stage plasma treatment. preferable.

Examples of the water-soluble paste include sodium alginate, starch, modified starch (dextrin, carboxymethyl starch, etc.), fiber derivatives (methyl cellulose, ethyl cellulose, carboxymethyl cellulose, etc.) and synthetic pastes (polyvinyl alcohol). , Polyacrylic acid, etc.).

The sizing agent may be used alone or in combination of two or more.

The sizing agent is usually used in the form of a paste by adding water. In this case, the concentration of the paste can be appropriately set according to the type of the woven or knitted fabric or the nonwoven fabric to be applied.
About 5 to 20 wt% is preferable, and about 0.5 to 10 wt% is particularly preferable.

The method for applying the paste to the woven or knitted fabric or the non-woven fabric is not particularly limited as long as it can be uniformly applied to only one side of the woven or knitted fabric or the non-woven fabric. Coater, doctor coater, screen, patterned screen (for example,
A stamping method using a striped pattern, a lattice pattern, a circular pattern, an elliptical pattern, or a combination thereof.

The sizing agent may be applied to all or one side of the woven or knitted fabric or the nonwoven fabric.

When the paste is partially applied, for example,
Using the patterned screen as described above, the paste-applied portion and the non-applied portion are applied in various patterns (patterns) such as a striped pattern, a lattice pattern, a circular pattern, an elliptical pattern, and a combination of these patterns. can do.

The amount of the paste applied is not particularly limited as long as it functions as a plasma reaction preventing layer.
For example, it is possible to apply an amount of the paste such that the thickness of the paste after drying is about 40 to 60 μm.

The applied glue is dried, for example, by leaving it for 15 to 20 minutes in an atmosphere of about 60 ° C.
Let dry in the air for about 8 hours. Further, baking may be performed as necessary.

[Second stage] In the second stage, the woven or knitted fabric or the nonwoven fabric obtained by applying and gluing one surface obtained in the first stage is
Plasma treatment is performed in an atmosphere containing fluorocarbon.

Usually, when plasma treatment is performed in an atmosphere containing a fluorocarbon, a group containing a fluorine atom is bonded to the surface of the woven or knitted fabric or the nonwoven fabric and fluorinated (for example, C
F bonds, C-CF _{n (n} is an integer of 1 to 3), CF-CF _n
(N is an integer of 1 to 3) bonds, CF ₂ bonds, CF ₃ bonds, etc. are confirmed by XPS surface analysis). But,
The surface on which the applied paste is placed in the first stage is not fluorinated by the plasma treatment because the paste acts as a plasma reaction preventing layer. Therefore, by such a plasma treatment,
A group containing a fluorine atom only on the other side where the coating glue is not placed is bonded to the surface of the woven or knitted fabric or the nonwoven fabric, and it is possible to obtain a woven or knitted fabric or a nonwoven fabric having only one surface substantially fluorinated. .

The gas used for the plasma treatment in the method of the present invention is a gas containing fluorocarbon. As the fluorocarbon, a perfluorocarbon having about 1 to 5 carbon atoms can be preferably used.
F ₄ , C ₂ F ₆ , C ₃ F _{8 and the} like. The plasma treatment may be performed in an atmosphere containing a gas other than fluorocarbon, but in order to bond a group containing more fluorine atoms to the surface of the woven or knitted fabric or the nonwoven fabric (that is, to obtain a high fluorination rate). ) Is preferably performed in an atmosphere containing only a fluorocarbon gas. The fluorocarbons may be used alone or in combination of two or more.

The plasma processing is performed by a known plasma processing method,
For example, it can be performed by a method using a low-temperature plasma processing apparatus, a method using an atmospheric pressure plasma processing apparatus, or the like.

In the atmospheric pressure plasma processing method, since a fluorocarbon gas is usually used as a mixed gas with helium gas, a low-temperature plasma processing method using no helium gas is preferable because of a higher fluorination rate.

In a method using a low-temperature plasma processing apparatus, for example, a woven or knitted fabric or a nonwoven fabric having one side coated and glued is placed in an internal electrode type plasma apparatus, a low-temperature plasma processing gas is continuously introduced, and It can be performed by applying a voltage.

The conditions for the low-temperature plasma treatment are not particularly limited as long as a woven or knitted fabric or a nonwoven fabric having only one surface which is not coated with glue and fluorinated can be obtained, and can be appropriately set. Preferred conditions when using a commonly used internal electrode type plasma apparatus are exemplified below.

As a power source for applying a voltage, it is preferable to use, for example, about 13.56 MHz from the viewpoint of discharge continuity and plasma uniformity.

The discharge output is preferably about 0.1 to 1 W / cm ² , and the discharge time is about 5 seconds or more, particularly about 5 to 60 seconds.

The gas pressure at the time of discharge is 13.3-2.
It is preferably about 66 × 10 ³ Pa (0.1 to 20 mmHg), particularly 13.3 to 1.33 × 10 ³ Pa (0.1 to 1.3 mmHg).
10 mmHg) is preferable, and 13.3-1.
It is preferably about 33 × 10 ² Pa (0.1 to 1 mmHg).

The flow rate of the gas is 30 to 300 ml / min.
Degree is preferable, and about 100 to 200 ml / min is more preferable.

When the low-temperature plasma treatment is performed under the above conditions, the woven or knitted fabric or the nonwoven fabric is not damaged,
It is preferable because a high fluorination rate can be obtained.

The conditions of the atmospheric pressure plasma processing method can be appropriately set by referring to the above-described conditions exemplified for the low temperature plasma processing method.

[Third Step] Since the woven or knitted fabric or the nonwoven fabric obtained in the second step is left with a paste applied on one side, the paste is removed in the third step.

The removal can be carried out by using a commonly used method for removing a sizing agent from a cloth, for example, by washing with warm water of 40 to 60 ° C. or less. If necessary, the paste and the like may be removed by ultrasonic cleaning.

Thus, a woven or knitted fabric or nonwoven fabric having only one surface fluorinated (hydrophobicized), that is, a woven or knitted fabric or nonwoven fabric having different functions on the front and back sides is obtained. The present invention also includes the woven or knitted fabric or the nonwoven fabric thus obtained.

According to the method of the present invention, substantially only one surface can be fluorinated, and substantially only one surface can be modified. Since the woven or knitted fabric or the nonwoven fabric used in the present invention is hydrophilic, and the fluorinated surface exhibits hydrophobicity, the woven or knitted fabric or the nonwoven fabric obtained by the method of the present invention has different functions. I have.

The woven or knitted fabric or nonwoven fabric of the present invention When a hydrophilic woven or knitted fabric or nonwoven fabric is subjected to plasma treatment using a fluorocarbon gas by the method of the present invention, substantially only one surface is fluorinated, one surface is hydrophilic and the other surface is hydrophilic. Becomes hydrophobic, and a woven or knitted fabric or a nonwoven fabric having different functions on both sides can be obtained. The woven or knitted fabric or the nonwoven fabric having the following physical properties (1) or (2) can be obtained, depending on the plasma treatment conditions such as the type of the woven or knitted fabric or the nonwoven fabric and the type of the fluorocarbon gas. (1) The water absorption by the JISL 1096A method is about 10 seconds or less on one side (plasma non-irradiated side) and about 200 seconds or more on the other side (plasma irradiated side).

The water absorption rate of the non-plasma-irradiated surface is preferably about 5 seconds or less, and more preferably about 1 second or less. The water absorption rate of the plasma irradiated surface is preferably 3
It is about 00 seconds or more. (2) The number of fluorine atoms present on one side is at least four times the number of fluorine atoms present on the other side.

The number of fluorine atoms can be calculated, for example, by surface elemental analysis using ESCA, whereby the value of (2) can be obtained.

In the woven or knitted fabric or the nonwoven fabric of the present invention, the number of fluorine atoms existing on the front surface is larger than the number of fluorine atoms existing on the back surface, usually about 4 times or more, preferably about 4.2 times or more, and more preferably 5 times or more. It is more preferably about 0.8 times or more.

The woven or knitted fabric or nonwoven fabric of the present invention can be preferably used for raincoats, windbreakers, sports clothing, underwear and the like.

[0065]

According to the method of the present invention, it is possible to obtain a woven or knitted fabric or nonwoven fabric having substantially only one surface fluorinated (hydrophobized), that is, a woven or knitted fabric or nonwoven fabric having a different function. The woven or knitted fabric or the nonwoven fabric obtained by the method of the present invention has excellent front and back functions such as washing resistance.

[0066]

The present invention will be described in more detail with reference to the following Examples and Comparative Examples.

Example 1 As a water-soluble paste, sodium alginate was prepared using water so as to be 10% by weight. 50 μm thickness after drying
A paste was applied to one side of the cotton by a screen method so as to obtain a film, and left to dry in an atmosphere of 60 ° C. for 15 minutes. The cotton used had a thickness of 0.85 mm and a basis weight of 272.4 g / m ² .

Next, the above-mentioned cloth was placed on a sample stand between internal parallel plate electrodes in an internal electrode type plasma apparatus (plasma processing apparatus, trade name, manufactured by Hirano Kotone Co., Ltd.), and a low-temperature plasma treatment was performed. Was done. Low-temperature plasma processing
With C ₃ F ₈ as a fluorocarbon, a plasma device pressure 5.4 × 10 Pa, gas flow rate 100 ml / min, the plasma irradiation time 30 seconds, was carried out under conditions that discharge power 0.15 W / cm ^2. After the plasma treatment, air was introduced into the depressurized apparatus, and then the fabric was taken out of the apparatus.

The cloth taken out of the apparatus was immersed in warm water overnight to remove the adhesive and the like, and then dried.

Comparative Example 1 A fluorinated cotton was obtained in the same manner as in Example 1 except that no paste was applied as a plasma reaction preventing layer.

Example 2 A fluorinated cotton was obtained in the same manner as in Example 1 except that C ₂ F ₆ was used instead of C ₃ F ₈ as a fluorocarbon.

Comparative Example 2 A fluorinated cotton was obtained in the same manner as in Example 2 except that no paste was applied as a plasma reaction preventing layer.

Example 3 A fluorinated cotton was obtained in the same manner as in Example 1 except that CF ₄ was used instead of C ₃ F ₈ as a fluorocarbon.

Comparative Example 3 A fluorinated cotton was obtained in the same manner as in Example 3 except that no paste was applied as a plasma reaction preventing layer.

[Water Absorption Test] Examples 1 to 3 and Comparative Example 1
The fabrics obtained in Nos. 1 to 3 were washed according to a simple method of the JIS-0217-104 method. After the washing was repeated 10 times, the evaluation of water absorbency of each fabric was performed according to the JISL1096A method. Table 1 shows the results.

[0076]

[Table 1] From the results shown in Table 1, the fabrics of Examples 1 to 3 are water-absorbing on one side, hardly water-absorbing on the other side, fluorinated on one side only, and have excellent front and back functions. You can see that it is doing. On the other hand, since the fabrics of Comparative Examples 1 to 3 are both fluorinated and have a hydrophobic group, it can be seen that both surfaces have no water absorption and do not have different front and back functions.

[Water Permeability (Wet Area)] The fabrics obtained in Examples 1 to 3 and Comparative Examples 1 to 3 were subjected to the following water permeability test. That is, an ink solution obtained by diluting a commercially available ink (blue black) 2.0 times with water on a glass plate coated with Teflon (registered trademark) resin (hereinafter referred to as “water droplet”).
0.1 cc) was dropped exactly. Each fabric was placed on a water drop with the plasma-treated surface facing up and left for 60 seconds. Next, each fabric was moved onto another glass plate coated with a Teflon resin, left for 3 minutes, and the wet area on both sides of each fabric was measured.

The water permeability of each fabric washed 10 times in accordance with the simple method of JIS-0217-104 was similarly evaluated.

In each of the fabrics of Examples 1 to 3, water did not penetrate to the plasma-treated surface before and after washing. On the other hand, in each of the fabrics of the comparative examples, water had penetrated to the plasma-treated surface. Therefore, it can be seen that only one surface of the fabric of the example is fluorinated, and that the fabric has different functions. In contrast, the fabrics of Comparative Examples 1 to 3 are:
It can be seen that the front and back functions are not obtained. Furthermore, the fabrics of the examples maintain the different front and back functions even after washing, and it can be seen that the front and back different functions of the fabric obtained by the method of the present invention are durable.

[Surface Analysis by XPS]
Elemental analysis was performed on the surfaces of the fabrics obtained in Examples 1 to 3 on the plasma irradiation side and the plasma non-irradiation side. Elemental analysis was also performed on the surface of the fabric before the plasma treatment (Comparative Example 4). The measurement was performed after washing 10 times according to the simple method of JIS-0217-104.

XPS was performed using Φ Quantum 2000 under the following conditions.

Analysis area: 100 μmΦ X intensity: 15 kV, 24.3 W Pass energy: 187.85 eV (wide) /23.50
(Narrow).

The results obtained by elemental analysis of the surface are shown in Table 2 for the surface (plasma-irradiated surface) and the back surface (plasma-unirradiated surface) as the ratio of the number of fluorine atoms to carbon atoms (F / C). . Further, the ratio of the front surface to the back surface of these numerical values is shown.

[0084]

[Table 2] In any of the fabrics obtained in Examples 1 to 3, 10
Even after the first washing, more fluorine atoms exist on the front surface than on the back surface, which indicates that a group containing more fluorine atoms (hydrophobic group) exists on the front surface than on the back surface. Therefore, it is clear that the fabrics obtained in Examples 1 to 3 have different functions even after washing.

[Measurement of content of fluorine atom] The content of fluorine atom of the fabrics obtained in Examples 1 and 2 was measured after washing once, after washing five times, and after washing ten times, respectively. Washing was performed according to a simple method of the JIS-0217-104 method. The quantification of the fluorine atom was carried out according to the method of Belcher et al. (Alizarin complexon method), which is described in “Organic microquantitative analysis, Nankodo, p. 394, (1969)”. The results are shown in Table 3 below.

[0086]

[Table 3] In each of the fabrics obtained in Examples 1 and 2, there was almost no change in the fluorine atom content after washing. The amount of fluorine atoms measured by the above method includes both the front surface and the back surface.From these results, the fluorination by the method of the present invention shows that the hydrophobic group containing the fluorine atoms bonded to the surface of the fabric is It can be seen that it has not disappeared by washing. Therefore, from these results, it is expected that the fabric obtained by the method of the present invention will maintain the different front and back functions even after washing.

[Brief description of the drawings]

FIG. 1 shows a model diagram of a water absorption / diffusion mechanism of a fabric (woven or knitted fabric).

FIG. 2 shows a method for one-sided modification of a woven or knitted fabric or a nonwoven fabric of the present invention.

[Explanation of symbols]

(A) Model diagram of water absorption and diffusion of hydrophobic woven / knitted fabric (B) Model diagram of absorption / diffusion of woven / knitted material having both hydrophilic surfaces (C) Model of water absorption / diffusion of woven / knitted material having both hydrophilic and hydrophobic surfaces Model diagram (1) Hydrophobic area (2) Hydrophilic area (3) Water droplet (4) Water permeable layer

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nori Goto 1-11-32 Shimanouchi, Chuo-ku, Osaka City, Osaka Prefecture Examiner, Nissin Textile Co., Ltd. Yoko Nakajima (56) References JP-A-59-106569 (JP) , A) JP-A-7-189114 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06M 10/02 D06M 13/08 D06M 23/16

Claims (7)

(57) [Claims] 1. A sizing agent is applied to one surface of a hydrophilic woven or knitted fabric or nonwoven fabric, and the other surface of the woven or knitted fabric or nonwoven fabric is subjected to plasma treatment in an atmosphere containing at least one kind of fluorocarbon, and then the sizing agent is removed. A method for modifying one side of a woven or knitted fabric or a nonwoven fabric. 2. The method according to claim 1, wherein the sizing agent is applied to the whole surface of the woven or knitted fabric or the nonwoven fabric. 3. The method according to claim 1, wherein the glue is partially applied to one side of the woven or knitted fabric or the nonwoven fabric. 4. The method according to claim 1, wherein the sizing agent is a water-soluble sizing agent. 5. The method according to claim 1, wherein an amount of the paste is applied so that the thickness of the paste after drying is 40 to 60 μm. 6. A hydrophilic woven or knitted fabric or nonwoven fabric which has been plasma-treated using at least one kind of fluorocarbon, and has a water absorption rate of 10 seconds or less on one side and 200 seconds or more on the other side according to the JISL 1096A method. A woven or knitted fabric or a nonwoven fabric. 7. A hydrophilic woven or knitted fabric or nonwoven fabric plasma-treated using at least one kind of fluorocarbon, wherein the number of fluorine atoms present on one side is 4 times the number of fluorine atoms present on the other side. A woven or knitted fabric or a nonwoven fabric characterized by being at least twice as large.