KR20240066679A - Process of water-repellent treatment for brush fabric - Google Patents

Abstract

The present invention relates to a water-repellent processing method of a napped fabric, which impregnates a napped fabric into a processing liquid containing 30 g/l or more of a water-repellent mixture in which a water-repellent agent formed of an acrylic monomer having 8 to 20 carbon atoms, a silicone processing agent, and a crosslinking agent are mixed, dehydrates the napped fabric with a mangle, and then heat-treats the napped fabric at 170°c or higher. it is possible to manufacture a water-repellent napped fabric having excellent washing durability with respect to water repellency that does not deteriorate the water repellency after washing.

Description

Water repellent processing method for brushed fabric {PROCESS OF WATER-REPELLENT TREATMENT FOR BRUSH FABRIC}

The present invention relates to a water-repellent processing method for brushed fabric, and relates to a water-repellent processing method for brushed fabric that can produce a water-repellent brushed fabric with excellent washing durability for water repellency that is not high after washing.

Recently, as interest in well-being culture has increased worldwide, great interest has been focused on special functional textile products that emphasize wearing comfort for the human body in addition to the fashionability and functionality that conventional clothing products must have.

Functional textile products are being developed to further improve the functionality of existing textile products, such as temperature control, lightness, elasticity, and breathability. Through processing technologies such as moisture-permeable and waterproof coating and film laminating processing, functional fiber products that were not required in existing textile products are being developed. New functionality is being provided.

Processing technology for functional textile products is required to develop products that emphasize functional aspects such as elasticity, UV protection, lightness, and soft touch in addition to moisture permeability, waterproofness, windproofness, breathability, and warmth in accordance with market demands.

Among these functional processes, water-repellent processing is a process that applies a hydrophobic material to the fibers that make up the textile fabric to prevent water from penetrating when water is dropped on the surface of the textile fabric and to give the performance of forming a water droplet. It is used for cotton, hemp, etc. It is a process that gives properties opposite to the water-wetting properties of natural fibers and synthetic fibers such as nylon, acrylic, and polyester.

Brushed fabric is widely used to make leisure sports clothing such as training suits, hooded jumpers, and zip-ups, and various clothing such as dresses and skirts. Recently, its use for outerwear in the fall and winter has increased, requiring water-repellent function. .

In the case of general fiber fabrics, a water-repellent function can be imparted through normal water-repellent processing, but in the case of brushed fabrics in which hair is formed on the surface of the fabric, there is a problem in that it is difficult to provide water-repellent properties through general water-repellent processing.

To solve this problem, in Korea Registered Patent No. 1372929, water repellency is given to the brushed fabric through single-layer water repellent treatment on the non-brushed side of the brushed fabric, or in Korea Registered Patent No. 1218248, the non-brushed side of the brushed fabric is given water repellency. A technology for imparting water repellency to a brushed fabric by laminating it with a fabric having a water repellent function has been disclosed.

However, the method of imparting water repellency to a brushed fabric as described above did not provide water repellency to the brushed surface, so the water repellent functionality was low and could not be said to have a water repellent function.

Therefore, Republic of Korea Patent No. 2115487 discloses a technology in which water repellency is imparted to the brushed fabric itself by impregnating the brushed fabric with a processing agent mixed with a non-fluorinated water repellent and a crosslinking agent in the post-processing step after brushing processing, but this method Water repellency is excellent before washing, but as the number of washings increases, water repellency rapidly decreases. Therefore, there is an urgent need for a water repellency processing method for brushed fabrics that also has excellent water repellency durability after washing.

The purpose of the present invention is to provide a water repellent processing method for brushed fabrics with excellent washing durability for water repellency by optimizing the optimal combination of water repellent and silicone processing agent and processing conditions as described above to solve the problems of the prior art. Do it as

In addition, the purpose is to provide a water-repellent brushed fabric with excellent water repellency through the water-repellent processing method described above.

The present invention involves impregnating a brushed fabric in a processing liquid containing more than 30 g/l of a water-repellent mixture of a water-repellent agent, a silicone processing agent, and a cross-linking agent formed of an acrylic monomer having 8 to 20 carbon atoms, and heat-treating it at 170°C or higher after drying. Provides a water-repellent processing method for brushed fabric.

In addition, the brushed fabric provides a water-repellent processing method for brushed fabric, characterized in that the brushed fabric contains recycled polyester fibers.

In addition, the water repellent is a water repellent processing method for brushed fabric, characterized in that one or more water repellent agents are used among 2-Ethylhexyl acrylate, Stearyl acrylate, iso-Butyl methacrylate, Vinyl esters of neodecanoic acid, Lauryl methacrylate, and Ethylene glycol dimethacrylate. provides.

In addition, the silicone processing agent provides a water-repellent processing method for brushed fabric, characterized in that it uses one or two or more silicones among Amino-functional silicone, Dimethyl poly silicone, Epoxy-functional silicone, and Methyl hydrogen silicone.

In addition, a water-repellent processing method for brushed fabric is provided, wherein the crosslinking agent is blocked poly isocyanate.

In addition, a water-repellent processing method for brushed fabric is provided, wherein the water-repellent agent and the silicone processing agent of the water-repellent mixture are mixed at a weight ratio of 70:30 to 50:50.

In addition, it provides a water-repellent processing method for brushed fabric, characterized in that the cross-linking agent of the water-repellent mixture contains 10 to 20% by weight of the total amount of water repellent and silicone processing agent.

In addition, a water-repellent processing method for brushed fabric is provided, characterized in that the water-repellent mixture of the processing liquid contains 30 to 50 g/l.

In addition, it provides a water-repellent processing method for brushed fabric, characterized in that the brushed fabric is heat-treated at 180 to 200°C.

In addition, a water-repellent brushed fabric is provided, which is formed by the water-repellent processing method described above.

In addition, the water-repellent brushed fabric provides a water-repellent brushed fabric characterized by a water repellency of grade 4 or higher after 10 washings according to AATCC-135.

As described above, the water-repellent processing method for brushed fabric according to the present invention provides excellent washing durability for water repellency by optimizing the optimal combination of water repellent and silicone processing agent and processing conditions.

In addition, the above water-repellent processing method has the effect of providing a water-repellent brushed fabric with excellent water repellency.

Hereinafter, a preferred embodiment of the present invention will be described in detail. First, in describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order to not obscure the gist of the present invention.

As used herein, the terms 'about', 'substantially', etc. are used to mean at or close to the numerical value when manufacturing and material tolerances inherent in the stated meaning are presented, and are used to enhance the understanding of the present invention. Precise or absolute figures are used to assist in preventing unscrupulous infringers from taking unfair advantage of stated disclosures.

The present invention relates to a method for water-repellent processing of brushed fabrics. The brushed fabric is impregnated in a processing liquid containing more than 30 g/l of a water-repellent mixture of a water-repellent agent, a silicone processing agent, and a cross-linking agent formed of an acrylic monomer having 8 to 20 carbon atoms, This relates to a water-repellent processing method for brushed fabric that is heat-treated at over 170°C after drying.

The brushed fabric may be manufactured from yarns made of various materials such as natural fibers, synthetic fibers, and artificial fibers, but for economical efficiency and eco-friendliness, it is preferable to use brushed fabrics formed from yarns formed from recycled polyester fibers.

In addition, the brushed fabric may be a brushed fabric formed of a fabric structure that can be manufactured as a brushed fabric, but it is preferable that it is a tricot warp knitted brushed fabric with a dense texture and excellent brushability.

The water repellent formed from an acrylic monomer having 8 to 20 carbon atoms is a substance that provides water repellency to brushed fabric. The water repellent used in the present invention is a water repellent formed from an acrylic monomer having 8 to 20 carbon atoms and can be used in textile fabrics. Any water repellent formed from acrylic monomers having a range can be used, but use one or two or more of 2-Ethylhexyl acrylate, Stearyl acrylate, iso-Butyl methacrylate, Vinyl esters of neodecanoic acid, Lauryl methacrylate, and Ethylene glycol dimethacrylate. It would be desirable to do so.

The silicone processing agent is a substance that improves the tactile feel of brushed fabrics and suppresses the deterioration of the tactile feel of brushed fabrics due to the water repellent. Any silicone processing agent that can be used on textile fabrics can be used, but Amino-functional silicone, Dimethyl poly silicone It would be preferable to use one or more of , epoxy-functional silicone, and methyl hydrogen silicone.

The water repellent and silicone processing agent in the water repellent mixture must be appropriately formulated to satisfy both water repellency and tactile feel. If the content of the silicone processing agent is high, the washing durability of the water repellency may decrease, so the water repellent and silicone processing agent must be mixed at a weight ratio of 70. It would be preferable to mix at :30~50:50.

It would be most preferable to mix the water repellent and the silicone processing agent at a weight ratio of 60:40.

The crosslinking agent is a material for fixing the water repellent to the brushed fabric. Any urethane-based crosslinking agent that can be used at 150 to 250°C can be used, but it is preferable to use blocked polyisocyanate.

The crosslinking agent of the water-repellent mixture is preferably contained in an amount of 10 to 20% by weight of the total amount of the water repellent and silicone processing agent. If the processing agent is contained in less than 10% by weight, the water repellency may decrease, and if it is contained in more than 20% by weight, the water repellency may be reduced. Because the improvement in water repellency is not significant, economic feasibility may be reduced.

It would be most preferable for the crosslinking agent to be contained in 15 to 20% by weight of the total amount of water repellent and silicone processing agent.

The water-repellent mixture is contained in water to form a processing fluid, and then the brushed fabric is impregnated. If the concentration of the water-repellent mixture in the processing fluid is too low, the water repellency may decrease, so the water-repellent mixture in the processing fluid must contain more than 30 g/l. It would be desirable.

When the concentration of the water-repellent mixture is 50 g/l or more, the improvement in water repellency is not significant, so it is most preferable that the water-repellent mixture concentration is 30 to 50 g/l.

As described above, the brushed fabric is impregnated with a processing liquid containing a water-repellent mixture, and after drying, the water-repellent agent is fixed through heat treatment. It is preferable that the heat treatment is 170°C or higher.

The heat treatment temperature is more preferably 180°C or higher, and is preferably lower than 200°C to save energy. Most preferably, the heat treatment temperature is 180 to 200°C.

Through the water-repellent processing method for brushed fabric according to the present invention described above, it will be possible to form a water-repellent brushed fabric with excellent washing durability for water repellency.

The water-repellent brushed fabric of the present invention has a water repellency of grade 4 or higher after washing 10 times according to AATCC-135, and has excellent water repellency before and after washing, so it can be used for various purposes such as clothing inner and outer layers.

Below, examples of the water-repellent processing method for brushed fabric according to the present invention are shown, but the present invention is not limited to the examples.

◎ Physical property evaluation

1. Water repellency test before and after washing

In the water repellency test, the water repellency of the test fabric was measured according to the spray method described in AATCC-22.

Water repellency before washing was measured after water repellent treatment and before washing. Water repellency after washing was measured by repeating washing 10 times for the test fabric according to AATCC-135 and putting the laundry in a tumble dryer at 60 to 80°C. , the water repellency was measured after drying for 30 to 40 minutes.

2. Fleece evaluation

The fleece properties were evaluated on a 5-point scale by 20 textile industry experts and were evaluated as the average value.

- 5 points: Very soft

- 4 points: softness

- 3 points: A little soft

- 2 points: Not soft

- 1 point: rough

Experimental Example 1: Composition ratio of water repellent and silicone processing agent

The water repellent used was 2-Ethylhexyl acrylate and Stearyl acrylate, and the silicone processing agent used was a mixture of Amino-functional silicone and Dimethyl poly silicone at a weight ratio of 1:1. Blocked poly isocyanate was used as the cross-linking agent.

After mixing the water repellent and the silicone processing agent, a crosslinking agent was added in an amount of 15% by weight of the total amount of the water repellent and the silicone processing agent to prepare a water repellent mixture.

The water-repellent mixture was added to water to prepare a processing liquid at a concentration of 50 g/l, and then the brushed fabric was impregnated with the processing liquid and passed through a mangle roller so that the pick up rate was about 50% by weight. Afterwards, it was dried at 120°C for 90 seconds and heat treated at 180°C for about 60 seconds to make the brushed fabric water-repellent.

The composition ratio according to the weight of the water repellent and the silicone processing agent is shown in Table 1, and the water repellency and fleece properties of the water-repellent brushed fabric before and after washing were evaluated according to the composition ratio and are shown in Table 1.

Water repellent: silicone processing agent 100:0 90:10 80:20 70:30 60:40 50:50 40:60 30:70 Water repellency before washing (grade) 5 5 5 5 5 5 5 5 Water repellency after washing (high) 4 4 4 4 4 2 One 0 fleece One One One 2 5 5 5 5

As shown in Table 1, as the content of the silicone processing agent increases, the fleece property improves, but the water repellency decreases after washing. For water repellency and fleeceability before and after washing, the weight ratio of the water repellent and the silicone processing agent is 70:30~ A 50:50 mix would be preferred.

In addition, when the content of the silicone processing agent is 40% by weight, the fleece property is rapidly improved, and the water repellency before and after washing does not decrease, so it would be most preferable to mix the water repellent and the silicone processing agent at a weight ratio of 60:40.

Experimental Example 2: Crosslinking agent content ratio

The water repellent used was 2-Ethylhexyl acrylate and Stearyl acrylate, and the silicone processing agent used was a mixture of Amino-functional silicone and Dimethyl poly silicone at a weight ratio of 1:1. Blocked poly isocyanate was used as the cross-linking agent.

The water repellent and the silicone processing agent were mixed at a weight ratio of 6:4, and then a crosslinking agent was added to prepare a water repellent mixture.

The water-repellent mixture was added to water to prepare a processing liquid at a concentration of 50 g/l, and then the brushed fabric was impregnated with the processing liquid and passed through a mangle roller so that the pick up rate was about 50% by weight. Afterwards, it was dried at 120°C for 90 seconds and heat treated at 180°C for about 60 seconds to make the brushed fabric water-repellent.

The crosslinking agent is shown in Table 2 as being added in an amount of 0 to 20% by weight of the total amount of water repellent and silicone processing agent. The water repellency of the water-repellent brushed fabric before and after washing was evaluated according to the cross-linking agent content, and is shown in Table 2.

Cross-linking agent ratio (% by weight) 0 5 10 15 20 Water repellency before washing (grade) 5 5 5 5 5 Water repellency after washing (high) 0 0 2 5 5

As shown in Table 2, when the crosslinking agent is contained in more than 10% by weight of the total amount of the water repellent and silicone processing agent, the water repellency after washing is greatly improved. It is preferable that the crosslinking agent is contained in more than 10% by weight of the total amount of the water repellent and silicone processing agent.

When the crosslinking agent is contained in more than 20% by weight of the total amount of the water repellent and silicone processing agent, the water repellency is not significantly improved. Therefore, it is most preferable that the crosslinking agent is contained in 15 to 20% by weight of the total amount of the water repellent and silicone processing agent.

Experimental Example 3: Water-repellent mixture concentration

The water repellent used was 2-Ethylhexyl acrylate and Stearyl acrylate, and the silicone processing agent used was a mixture of Amino-functional silicone and Dimethyl poly silicone at a weight ratio of 1:1. Blocked poly isocyanate was used as the cross-linking agent.

After mixing the water repellent and the silicone processing agent at a weight ratio of 6:4, a crosslinking agent was added in an amount of 15% by weight of the total amount of the water repellent and the silicone processing agent to prepare a water repellent mixture.

The water-repellent mixture was added to water to prepare a processing liquid at a concentration of 10 to 70 g/l, and then the brushed fabric was impregnated with the processing liquid and passed through a mangle roller so that the pick up rate was about 50% by weight. Afterwards, it was dried at 120°C for 90 seconds and heat treated at 180°C for about 60 seconds to make the brushed fabric water-repellent.

The concentration of the water-repellent mixture is shown in Table 3, and the water repellency of the water-repellent brushed fabric before and after washing was evaluated according to the concentration of the water-repellent mixture.

Processing agent concentration (g/ℓ) 10 20 30 40 50 60 70 Water repellency before washing (grade) 2 2.5 5 5 5 5 5 Water repellency after washing (high) 0 One 4 4.5 5 5 5

As shown in Table 3, if the water repellent mixture concentration is 30 g/l or more, the water repellency before washing is greatly improved, so it is preferable that the water repellent mixture concentration is 30 g/l or more.

In addition, since the water repellency does not improve significantly when the water repellent mixture concentration is 50 g/l or more, it is most preferable that the water repellent mixture concentration is 30 to 50 g/l.

Experimental Example 4: Heat treatment temperature

The water repellent used was 2-Ethylhexyl acrylate and Stearyl acrylate, and the silicone processing agent used was a mixture of Amino-functional silicone and Dimethyl poly silicone at a weight ratio of 1:1. Blocked poly isocyanate was used as the cross-linking agent.

After mixing the water repellent and the silicone processing agent at a weight ratio of 6:4, a crosslinking agent was added in an amount of 15% by weight of the total amount of the water repellent and the silicone processing agent to prepare a water repellent mixture.

The water-repellent mixture was added to water to prepare a processing liquid at a concentration of 30 g/l, and then the brushed fabric was impregnated with the processing liquid and passed through a mangle roller so that the pick up rate was about 50% by weight. Afterwards, it was dried at 120℃ for 90 seconds and heat treated at 160~220℃ for about 60 seconds to make the brushed fabric water-repellent.

The heat treatment temperature is shown in Table 4, and the water repellency of the water-repellent brushed fabric before and after washing was evaluated according to the heat treatment temperature and is shown in Table 4.

Heat treatment temperature (℃) 160 170 180 190 200 210 220 Water repellency before washing (grade) 5 5 5 5 5 5 5 Water repellency after washing (high) One 2 4 4 4 4 4

As shown in Table 4, the water repellency of the brushed fabric before washing is grade 5, showing excellent water repellency, but the water repellency after washing varies greatly depending on the heat treatment temperature. The water repellency is grade 2 or higher at 170℃ or higher, and the water repellency is grade 2 or higher at heat treatment temperature of 170℃ or higher. It is preferable, more preferably 180°C or higher, and preferably less than 200°C for energy saving, and the heat treatment temperature is most preferably 180 to 200°C.

Claims (11)

The brushed fabric is impregnated in a processing liquid containing more than 30 g/l of a water-repellent mixture of a water-repellent agent, a silicone processing agent, and a cross-linking agent formed of an acrylic monomer having 8 to 20 carbon atoms, and heat-treated at 170°C or higher after drying. Water repellent processing method for brushed fabric. According to paragraph 1,
A water-repellent processing method for brushed fabric, characterized in that the brushed fabric contains recycled polyester fibers. According to paragraph 1,
The water repellent is a water repellent processing method for brushed fabric, characterized in that one or more of 2-Ethylhexyl acrylate, Stearyl acrylate, iso-Butyl methacrylate, Vinyl esters of neodecanoic acid, Lauryl methacrylate, and Ethylene glycol dimethacrylate is used. According to paragraph 1,
The silicone processing agent is a water-repellent processing method for brushed fabric, characterized in that one or more of Amino-functional silicone, Dimethyl poly silicone, Epoxy-functional silicone, and Methyl hydrogen silicone is used. According to paragraph 1,
A water-repellent processing method for brushed fabric, characterized in that the crosslinking agent is blocked poly isocyanate. According to paragraph 1,
A water-repellent processing method for brushed fabric, characterized in that the water-repellent agent and the silicone processing agent of the water-repellent mixture are mixed at a weight ratio of 70:30 to 50:50. According to paragraph 1,
A water-repellent processing method for brushed fabric, characterized in that the cross-linking agent of the water-repellent mixture contains 10 to 20% by weight of the total amount of water repellent and silicone processing agent. According to paragraph 1,
A water-repellent processing method for brushed fabric, characterized in that the water-repellent mixture of the processing liquid contains 30 to 50 g/l. According to paragraph 1,
A water-repellent processing method for brushed fabric, characterized in that the brushed fabric is heat-treated at 180 to 200°C. A water-repellent brushed fabric, characterized in that it is formed by the water-repellent processing method of any one of claims 1 to 9. In paragraph 10
The water-repellent brushed fabric is a water-repellent brushed fabric characterized by a water repellency of grade 4 or higher after 10 washings according to AATCC-135.