KR20060082356A - One-sided water repellent coated textile and the manufacturing method thereof - Google Patents

Abstract

The present invention comprises the steps of applying a water-repellent coating solution to the fabric to form a water-repellent coating on the fabric; Washing and removing a thickener from the fabric having the water repellent coating formed thereon; And a heat-repellent coating fabric prepared by the method and heat-weaving-coated fabric produced by the method comprising the step of heat-treating the fabric.

The water repellent coating method of the present invention is applicable to thin fabrics, the fabric according to the present invention is characterized by maintaining excellent water repellency even during repeated washing.

Water repellent, Coating, Knife overalls, Knitted fabric

Description

One-sided Water Repellent Coated Textile and the Manufacturing Method Thereof}

The present invention relates to a water-repellent coating fabric and a method of manufacturing the same, and more particularly, to a water-repellent coating fabric and excellent manufacturing method for washing durability produced by coating a water repellent on only one side of the fabric.

Fabrics with a water-repellent coating should be characterized by rapid discharge of water vapor from the human body without the passage of external water in liquid or solid form, such as rain or snow. In addition, the water-repellent coated fabric should be free from water repellency even after repeated washing, and there should be no change in color or feel of the fabric during water repellent processing.

Conventionally, a roll coating method is employed in which a water repellent is sprayed in order to impart a water repellent function to the fabric, or the water repellent is coated on the fabric while passing through the fabric between two rolls.

However, in order to maintain sufficient water repellency, the spray method had to have a large amount of spraying of the coating liquid, and due to the spraying of a large amount of coating liquid, the water repellent particles diffused to the back side of the fabric so that the back side was water-repelled and the internal water vapor did not diffuse quickly to the outside. There was this.

In the roll coating method, since the fabric is transported between two contacting rollers, the pressure of the upper roller causes a transition of the water repellent to the back side of the fabric, which makes it difficult to give a single water repellent function.

In addition, these two methods have another problem that is very difficult to apply when the thickness of the fabric is thin.

The present invention is to solve the above problems, the first technical problem is to propose a method for producing a fabric having a high water-repellent function excellent wash durability.

In addition, another technical problem to be achieved by the present invention is to propose a fabric having a good water-repellent function of washing durability.

In order to achieve the first technical problem of the present invention as described above, applying a water-repellent coating solution to one side of the fabric to form a water-repellent coating on the fabric; Washing and removing a thickener from the fabric having the water repellent coating formed thereon; And it provides a method for producing a knitted fabric coated fabric comprising the step of heat-treating the fabric is removed the thickener.

In the method of manufacturing a water-repellent coating fabric of the present invention, the method of applying the water-repellent coating solution to the fabric is preferably a knife-over-roll method, and the method of applying the water-repellent coating solution of the knife-over-roll method has a knife thickness of 0.3 mm to 1.0 mm. 15% to 40%, more preferably, when the fabric is less than 100g / sqm knife thickness 0.3mm to 0.5mm and pickup 15% to 25%, the fabric is more than 100g / sqm If the thickness is less than 200 g / sqm, the knife thickness is 0.6 mm to 0.8 mm and the pickup is 25% to 30%. If the fabric is more than 200 g / sqm, the knife thickness is 0.7 mm to 1.0 mm and the pickup 30% to 40%. Good to do.

In the present invention, the step of washing the thickener in the method for producing a water-repellent coating fabric is preferably a method of continuously washing with water at 40 ° C. to 80 ° C., and the heat treatment step is performed at 30 ° C. to 170 ° C. to 190 ° C. It is preferable to perform for from 1 second to 30 minutes.

In the method of manufacturing a knitted water-repellent coating fabric of the present invention, the fabric is preferably dyed in a range of 110 ° C. to 150 ° C., and preferably a quick-drying and quick-drying treatment at a temperature of 130 ° C.

The method for producing a water-repellent coating fabric of the present invention may further include heat-treating the fabric having the water-repellent coating for 30 seconds to 1 minute and 30 seconds at 170 ° C to 180 ° C prior to the step of washing the thickener.

Hereinafter, the present invention will be described in more detail based on the attached examples.

Method for producing a water-repellent coating fabric of the present invention comprises applying a water-repellent coating solution to one side of the fabric to form a water-repellent coating on the fabric; A washing step of washing and removing a thickener from the fabric on which the water repellent coating is formed; And a heat treatment step of heat treating the fabric to restore the water repellency after the cleaning.

In the step of forming the water repellent coating, the selection of the water repellent and the method of applying the water repellent are important.

The water repellent must have 1) forming a hydrophobic layer with a large contact angle on the surface of the fabric without impairing the breathability of the fabric and making contact water into droplets, and 2) attaching the hydrophobic material to the fiber physically and chemically. , Combined with good washing resistance, dry cleaning resistance, etc., 3) widely applicable to various fibers and not dropping as much as possible, depending on the shape of the fabric, 4) compatibility with other processing agents Good, 5) no deterioration in strength, yellowing, no adverse effect on color fastness, 6) no change over time, and no significant change in temperature.

In the present invention, a water repellent was used as a fluorine-based water repellent, an isocyanate compound was used as a crosslinking agent, a thickener including hydroxyethyl cellulose component, ammonia was used for viscosity adjustment, acetic acid was used for acidity adjustment, solvent Was made into water.

The coating method of the water repellent is the knife over roll method. The knife-over-roll method is a method of supplying a film forming material to the front of the knife by fixing the doctor knife at right angles to the direction of the substrate, and coating as the bubble progresses. These include: 1) printing knife coating, 2) knife over roll coating, 3) blanket knife coating, and 4) inverted knife coating.

In the coating of the water repellent agent, it is important to control the thickness of the water repellent coating, and the thickness of the water repellent coating can be achieved by strictly controlling the application amount of the water repellent coating.

When the water repellent is applied in the knifeover roll method, the amount of the water repellent applied is determined by the thickness of the knife and the pickup level. In this case, the knife thickness may vary depending on the basis weight of the fabric (g / sqm, sqm represents the square meter), but preferably 0.3 mm to 1.0 mm regardless of the basis weight of the fabric. The pickup is preferably 15% to 40% of the pickup, depending on the basis weight of the fabric. Pickup (%) is calculated as "[Weight of fabric after chemical treatment (wet state)-Fabric weight before chemical treatment (dry state)] / Weight of fabric before chemical treatment (dry state)". It means that the function to be expressed is increased by that amount. If there are many pickups, the effect is excellent, but the treatment cost increases and there is a problem in that the possibility of infiltrating the drug increases, so the selection of the pickup according to the basis weight of the fabric becomes important.

More specifically, when the fabric is 100 g / sqm or less, the knife thickness is preferably 0.3 mm to 0.5 mm and the pickup 15% to 25%. When the fabric is more than 100 g / sqm and the thickness is 200 g / sqm or less, the knife thickness is 0.6 mm. It is preferable to set it as 0.8 to 0.8 mm and pickup 25% to 30%, and when the fabric exceeds 200 g / sqm, the knife thickness is preferably 0.7 mm to 1.0 mm and pickup 30% to 40%.

If the fabric is less than 100 g / sqm, if the knife thickness is less than 0.3 mm and the pickup is less than 15%, the coating liquid may not be sufficiently applied to form a coating layer, and the knife thickness may be greater than 0.5 mm, and the pickup 25% If exceeded, there is a high possibility that the transfer of the water repellent coating liquid to the back of the fabric on which the water repellent coating layer is formed.

When the fabric is more than 100g / sqm and less than 200g / sqm, when the knife thickness is less than 0.6mm and the pickup is less than 25%, the coating liquid is not applied enough, the formation of the coating layer may be insufficient, the knife thickness is more than 0.8mm In addition, when the pickup exceeds 30%, the transfer of the water repellent coating liquid to the back side of the fabric on which the water repellent coating layer is formed is likely to occur.

When the fabric exceeds 200 g / sqm, when the knife thickness is less than 0.7 mm and the pickup is less than 30%, the coating liquid is not applied sufficiently, so that the formation of the coating layer is insufficient, the knife thickness is greater than 1.0 mm, and the pickup is 40%. If exceeded, there is a high possibility that a water repellent coating liquid transitions to the back side of the fabric to be water repellent coated.

As described above, a water-repellent coating is formed through a water-repellent coating, and then heat-treated to obtain a knitted-repellent coating fabric. The heat treatment is preferably performed at 160 ° C. to 190 ° C. for 30 seconds to 1 minute 30 seconds, and more preferably at 170 ° C. to 180 ° C. for 45 seconds to 1 minute 15 seconds. If the heat treatment temperature is 160 ° C or less, the water repellency may drop due to poor heat treatment, and when the heat treatment temperature is 190 ° C or more, the touch becomes hard. This may result in poor water repellency due to poor heat treatment when the heat treatment temperature is 170 ° C. or lower, or hardened by 180 ° C. or more, depending on the water repellent coating solution. In addition, when the water repellent time is 30 seconds or less, there may be a problem in that the chains of the compounds constituting the water repellent agent of the water repellent coating are not arranged neatly, so that the water repellency and washing durability are poor. In addition, since the arrangement of the chain may be sufficient within about 1 minute, there is little need for heat treatment for 1 minute 30 seconds or more.

There is a high possibility that a thickener remains in the heat-treated water repellent coating, and the remaining thickener not only reduces the vividness of colors, but also reduces the merchandise of the coated fabric due to its inherent odor, thereby cleaning the thickener. You need to do it.

Washing of the thickener is made of water, and a washing temperature of 50 ° C to 80 ° C is appropriate. In particular, when a cellulose-based thickener is used, the thickener has a property of washing well around 60 ° C, and thus the washing temperature is more preferably 55 ° C to 65 ° C. If the cleaning temperature is less than 50 ℃, the cleaning power is weak and difficult to wash completely, 80 ℃ can deform the chain of the compound constituting the water repellent, water repellency is lowered and water repellent penetrating into the back surface of the fabric coating surface may occur. There is a problem that all of the back surface exhibits water repellency.

In addition, in the case of washing with water, it is more preferable to take a continuous washing step for continuously washing in terms of productivity and product quality.

When a fluorine-based water repellent is used as the water repellent, the water repellent has a C-F bond, and the C-F bond energy is considerably high, such as about 116 kg / mol, so that the surface of the water repellent coated fabric has excellent heat and chemical resistance. However, after the thickener cleaning, even though the fabric surface is chemically stable, the molecules are arranged outward and the surface structure is disturbed. This decreases the effect of blocking the water and oil is reduced water repellency and oil repellency. Therefore, there is a need for a reheating process for restoring the modification of the molecular structure resulting from the thickener cleaning to maintain water repellency and oil repellency.

The reheating temperature is preferably carried out at 170 ° C to 190 ° C for 30 seconds to 1 minute 30 seconds. If the reheat treatment temperature is less than 170 ℃ there is a problem that the wash durability is poor, if more than 190 ℃ there is a problem that the change is likely to occur in the touch and color.

It is preferable that the fabric of the present invention is treated with a quick drying sweat (absorb sweat and dries quickly) during dyeing. Without the quick drying treatment, it simply absorbs the water vapor emitted from the inside and cannot quickly diffuse and discharge the water vapor to the outside. The sweat-absorbing quick-drying treatment is performed at a temperature range of 110 ° C. to 150 ° C., preferably at 130 ° C. for about 30 minutes to 1 hour 30 minutes.

<Example 1>

Bi-directional stretch dobby fabric (Basic weight 328g / sqm) of inclined fineness 75D / 36F, polyurethane 40D, weft fineness 75D / 72F, antibacterial deodorant 225D / 108F, polyurethane 40D was used. Treated. Add 20 parts of water repellent, 2 parts of thickener, 75 parts of water, stir thoroughly, add 0.001 parts of ammonia, adjust the viscosity to 16,000 cps, and adjust the acidity to 6 with 0.0005 parts of acetic acid, followed by water 2.9985 The water-repellent coating solution applied above was prepared in the manner of adding parts. The water-repellent coating solution composition was formed on the fabric by a knife-over-roll knife thickness 0.7mm, pick-up 30% to form a water-repellent coating film, and then washed with a thickener in a continuous washing method at 60 ℃, heat treatment at 180 ℃ after tumbler treatment OWF stands for ON THE WEIGHT OF FABRIC and refers to the amount of preparation added to the weight of the fabric. For example, when 100 g / yd of the fabric is treated with 2% OWF, the amount of preparation is 2 g / L is a method of absorbing quick drying in the present embodiment in addition to dyes to be dyed in a batch type dyeing machine, various preparations and quick drying fast drying agents are simultaneously added at low temperature to give dyeing and quick drying function.

<Example 2>

A knitted-coated fabric was prepared in the same manner as in Example 1, except that the gradient fineness 75D / 36F and the weft fineness 0.2D-grade micro 240D / 96F double woven fabric (Basic weight 250 g / sqm) were used.

<Example 3>

Gradient fineness 50D / 36F, weft fineness 0.2D grade micro 120D / 48F plain weave fabric (basic weight 80g / sqm) were used, and 3% dyeing was performed by quick-drying with OWF. Add 15 parts of water repellent, 2 parts of thickener, 80 parts of water, stir well, add 0.001 parts of ammonia, adjust the viscosity to 16,000 cps, adjust the acidity to 6 with 0.0005 parts of acetic acid, and then add 2.9985 water. The water-repellent coating solution applied above was prepared in the manner of adding parts. The water-repellent coating liquid composition was formed on the fabric by a knife-over roll method with a knife thickness of 0.3 mm and a pickup of 15% to form a water-repellent coating film, followed by washing with a thickener in a continuous washing method at 60 ° C., and heat-treating at 180 to prepare a water-repellent coating fabric. It was.

Comparative Example 1

A knitted-coated fabric was prepared in the same manner as in Example 1 except that the knife thickness was 0.3 mm and the pickup 15%.

Comparative Example 2

A knitted-coated fabric was prepared in the same manner as in Example 3 except that the knife thickness was 0.7 mm and the pickup 30%.

Comparative Example 3

Except for sweat drying, a knitted repellent coating fabric was prepared in the same manner as in Example 3.

The main physical properties of the products prepared in Examples 1 to 3 and Comparative Example 1 were tested and the results are shown in Table 1.

TABLE 1

Yes Fabric coated cotton water repellency Water repellency touch                                          Sweat drying Elasticity change                                          Color change Early 20 times of washing Before treatment After treatment Before treatment After treatment Example 1 100 90 0 good good 0 0 0 none Example 2 100 90 0 good good 0 - - none Example 3 100 80 0 good good 0 - - none Comparative Example 1 90 70 0 good usually 0 0 0 has exist Comparative Example 2 100 90 100 good usually 0 - - none Comparative Example 3 100 90 70 good usually × - - has exist

As can be seen in Examples 1 to 3, the laundry durability is better when the knife thickness and pickup are sufficiently given, and Example 1 showed the best washing durability among the examples.

Comparing Example 1 and Comparative Example 1, if the thickness of the relatively thick fabric of 328 g / sqm was not given enough knife thickness and pick-up, the initial water repellency also decreased, especially after 20 washings. It is noticeable that there is a problem in washing durability.

In addition, when compared to Example 3 and Comparative Example 2 when the knife thickness and pickup excessively given a relatively thin fabric having a basis weight of 80g / sqm, there is no problem in the water repellency of the fabric coating surface, when water-repellent coating treatment The water-repellent coating liquid is transferred to the back of the fabric, the back of the fabric also has a water repellent function, there was a problem that can not effectively discharge the sweat and moisture inside.

In addition, when comparing Example 3 and Comparative Example 3, in the case of Comparative Example 3 which is not the sweat-absorbent quick-drying treatment, the back surface has a water repellent function, it turned out that there is a problem in effectively discharging sweat and moisture inside.

In addition, it was found that there was a change in the touch even when the proper knife thickness and the pickup were not adjusted for the fabric of each basis weight.

The method for producing a water-repellent coating fabric of the present invention can effectively impart a water repellent effect on only one side regardless of the shape of the fabric. In particular, when the knife-over coating is applied, the thickness and pickup of the knife are adjusted according to the basis weight of the fabric, thereby maintaining the optimum water repellent function and preventing the water repellent coating liquid from transferring to the back side of the coating surface of the fabric on which the water repellent coating layer is formed. have.

In addition, the water-repellent coating fabric of the present invention has an excellent water-repellent effect, and excellent washing durability, such as water repellency does not fall even after repeated washing.

Claims (9)

Applying a water repellent coating on one side of the fabric to form a water repellent coating on the fabric; Washing and removing a thickener from the fabric having the water repellent coating formed thereon; And The method of claim 1, comprising the step of heat-treating the fabric is removed thickener. The method of claim 1, The method of applying the water-repellent coating liquid to the fabric is a method of manufacturing a water-repellent coating fabric, characterized in that the knife-over roll method. The method of claim 2, The method of applying the water-repellent coating solution of the knife over roll method is a knife thickness 0.3mm to 1.0mm and pick-up water repellent coating fabric, characterized in that 15% to 40% pickup. The method of claim 2 or 3, The knife-over-roll type water repellent coating liquid coating method, If the fabric is less than 100g / sqm knife thickness 0.3mm to 0.5mm and pick-up 15% to 25%, If the fabric is more than 100g / sqm and less than 200g / sqm knife thickness 0.6mm to 0.8mm and pickup 25% to 30%, If the fabric exceeds 200g / sqm knife thickness 0.7mm to 1.0mm and pickup 30% to 40% characterized in that the manufacturing method of the water-repellent coating fabric. The method of claim 1, The washing step of the thickener is a method for producing a water-repellent coating fabric, characterized in that the method of continuously washing with water at 40 ℃ to 80 ℃. The method of claim 1, The heat treatment step is a method for producing a fabric, characterized in that the fabric is carried out for 30 seconds to 1 minute 30 seconds at a temperature of 170 ℃ to 190 ℃. The method of claim 1, The fabric is a method of producing a water-repellent coating fabric, characterized in that the sweat-absorbent quick-drying treatment at a temperature of 110 ℃ to 150 ℃. The method of claim 1, The method of claim 1 further comprising the step of heat-treating the fabric having the water-repellent coating formed at 170 ℃ to 180 ℃ temperature for 30 seconds to 1 minute 30 seconds before the cleaning step of the thickener. A water-repellent coating fabric made by the method of any one of claims 1 to 8.