KR101403381B1 - Method for manufacturing transport high-density tricot suede - Google Patents

Abstract

The present invention provides a method to manufacture a highly sensitive high-performance tricot suede product which can be used for transport. The tricot suede product is manufactured by a raw fabric (S1), raising and shearing (S2), contraction (S3), heat setting (stretching) (S4), impregnating aqueous polyurethane (S5), reducing weight (S6), drying (S7), grinding (S8), dyeing (S9), processing (S10), and blushing (S11); or the tricot suede product is manufactured by the raw fabric (S21); raising and shearing (S22), reducing weight (S23), contraction (S24), heat setting (stretching) (S25), impregnating aqueous polyurethane (S26), grinding (S27), dyeing (S28), processing (S29), and blushing (S30). Therefore, the tricot suede product can exhibit a more luxurious appearance than an existing nonwoven suede, has dimensional stability owing to the ground texture, and can realize the sensation of fullness owing to napping texture.

Description

METHOD FOR MANUFACTURING TRANSPORT HIGH-DENSITY TRICOT SUEDE BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

TECHNICAL FIELD The present invention relates to the production of artificial leather, and more particularly, to a method for manufacturing a high-sensitivity / high-density tricot suede which can be used as a material for transportation and can also be used as an interior material or an industrial material.

Tricot suede refers to a fabric that is treated like a suede (leather) fabric, with a corrugated fabric that gives a knit feel using a woolen or worsted yarn, called tricot fabrics. Tricot suede is artificial leather (artificial leather), usually made of polyester (chemical fiber).

The method of producing artificial leather is mostly a process using a solution type polyurethane resin ("polyurethane-organic solvent solution"), and a method in which a conventional solution type polyurethane resin is applied on a substrate such as a fabric, a knitted fabric, to be. As a concrete example, a conventional artificial leather manufacturing method is a method of manufacturing a nonwoven fabric by carding and needle punching using ultra fine staple fiber yarn, impregnating solvent type polyurethane, dyeing and post-processing.

Among these artificial leather products, tricot suede products are made by weaving seawater / split type microfiber materials in the form of woven, knitted or nonwoven fabric, and in case of woven or knitted fabric, wetting impregnated polyurethane resin, , A polishing process, and the like.

However, such conventional tricot suede products are excellent in emotional quality, but are poor in terms of physical properties due to the problem of dyeability of polyurethane resin, and there are many cases of complaints from customers due to the problem of transfer of the finished products.

In addition, organic polyurethane synthetic leather including tricot suede is essentially used as an organic solvent, and the use of such an organic solvent causes problems of environmental pollution throughout the world, and organic solvents are known as carcinogenic substances It is harmful to the human body if it remains in the synthetic leather which is the final product.

In order to solve such problems, studies on the production of synthetic leather using solventless polyurethane have been carried out all over the world. However, difficulty in proper raw material production, difficulty in manufacturing process due to rapid curing of raw materials, unevenness of product, It has not yet been put to practical use due to problems such as deterioration of product quality.

In addition, the conventional tricot suede uses a short fiber to reduce shape deformation and mechanical properties, and it is impossible to manufacture a high density nonwoven fabric due to limitations in the method of web formation and binding, and also develops a fabric type I do not know.

Registered Patent Publication No. 10-0891447 "High sensitive two-side knit made of microfiber warp knitted fabric, method for manufacturing the same,

Accordingly, it is an object of the present invention to provide a manufacturing method capable of producing a tricot suede product having high sensitivity and high physical properties, which can be applied for transportation, and which is a microfiber material and environmentally friendly.

According to the present invention, there is provided a method of manufacturing a tricot suede,

The tricot suede products are manufactured by performing the processes of raising and raising and raising and sharing, shrinkage, heat setting (infiltration), aqueous polyurethane impregnation, weight loss, drying, polishing, dyeing, processing and blushing ,

In the process of obtaining the raw paper, it is possible to use a ground yarn and a plush yarn serving as a bristle in order to catch the grain by using 40 to 60 denier polyester yarn and 65 to 85 denier sea- A tricot suede raw material having a double structure was obtained,

In the process of shrinkage, a certain amount of the water-absorbing agent is infiltrated into the suede fabric through the dipping process and the squeezing process, and 20 to 40% of the initial stage is aged at a temperature of 50 to 80 ° C for 2 to 3 hours, High shrinkage of the ground yarn causes the ground yarn to hold the floss yarn properly,

In the weight reduction process, a caustic soda injection amount of 10 to 20 g / l, a high-temperature aging temperature of 40 to 60 캜, and a maintenance time of 1 to 3 hours so that the touch feeling of the plush yarn is excellent, So that the sea-island yarn constituting the suede bristle of the plush yarn is formed of the sea-likeness yarns having a denier micro-fineness of 0.05 to 0.06, and after the weight reduction, And high-temperature washing is carried out for 30 to 150 minutes in a high density tricot suede for transportation.

In addition, in the method of manufacturing the tricot suede according to another aspect of the present invention, it is also possible to produce a tricot suede according to the present invention, wherein the raw cloth → raising and raising and raising and shearing → weight loss → shrinkage → heat setting (extrusion) → aqueous polyurethane impregnation → polishing → dyeing → processing → blur A brushing process is performed to produce a tricot suede product,

In the process of obtaining the raw paper, it is possible to use a ground yarn and a plush yarn serving as a bristle in order to catch the grain by using 40 to 60 denier polyester yarn and 65 to 85 denier sea- A tricot suede raw material having a double structure was obtained,

In the process of shrinkage, a certain amount of the water-absorbing agent is infiltrated into the suede fabric through the dipping process and the squeezing process, and 20 to 40% of the initial stage is aged at a temperature of 50 to 80 ° C for 2 to 3 hours, High shrinkage of the ground yarn causes the ground yarn to hold the floss yarn properly,

In the weight reduction process, a caustic soda injection amount of 10 to 20 g / l, a high-temperature aging temperature of 40 to 60 캜, and a maintenance time of 1 to 3 hours so that the touch feeling of the plush yarn is excellent, So that the sea-island yarn constituting the suede bristle of the plush yarn is formed of the sea-likeness yarns having a denier micro-fineness of 0.05 to 0.06, and after the weight reduction, And high-temperature water washing is performed for 30 to 150 minutes.

In the present invention, the aqueous polyurethane used in the aqueous polyurethane impregnation is prepared by mixing spherical silica nanosol having a size of 1 to 1,000 nm and silica nanostructure having a size of 0.9 to 1.0 wt% with water-soluble polyurethane, By weight to 10% by weight of a water-soluble urethane coating agent. The aqueous urethane coating agent is characterized by being provided with a self-cleaning function capable of preventing contamination.

Also, in the present invention, the double-structure suede raw paper is firstly densified with a tricot warp knitting machine and has a density of 27 to 37 needle gauge, and the shrinking process is a chemical shrinkage in the shrinking process, So that high density can be achieved.

Furthermore, in the present invention, spun yarns of 60 to 80 deniers are used in combination with the sea-island yarn of 65 to 85 denier for the plush yarn.

The present invention makes it possible to produce tricot suede products which are of high sensitivity and high physical properties and which are microfiber-like materials and environmentally friendly enough to be applied for transportation such as automobile seat materials. That is, the present invention can realize a more luxurious appearance than conventional nonwoven fabric suede, excellent in shape stability due to ground texture, and able to realize emotions with fullness due to brushed texture. It is easy to differentiate in quality with double structure and it is cheaper than existing products. And it is possible to develop eco-friendly products by applying water-soluble chemicals, and it is possible to improve self-cleaning function and wear resistance through eco-friendly water-soluble polyurethane processing with nano synthesis technology.

FIG. 1 and FIG. 2 are a manufacturing procedure of a tricot suede product according to an embodiment of the present invention,
FIGS. 3A and 3B are photographs of a car seat, an information communication device, and a mobile phone case manufactured using the high density transportation tricot suede manufactured according to the manufacturing method of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The main manufacturing process for manufacturing a tricot suede product having high sensitivity and high physical properties according to an embodiment of the present invention is as follows.

* Manufacturing Procedure (1)

(S1) → raising and shearing (S2) → shrinkage (S3) → thermal setting (S4) → aqueous polyurethane impregnation (S5) → weight loss (S6) → drying (S7) → polishing (S8), dyeing (S9), processing (S10), blushing (S11)

* Manufacturing Procedure (2)

The raw paper S21, the raising and shearing S22, the weight loss S23, the shrinkage S24, the column setting (S25), the aqueous polyurethane impregnation (S26), the polishing (S27) (S28)? Processing (S29)? Blushing (S30)

In the present invention, the tricot suede raw material is first prepared using the tricot warp knitting machine as in step S1 of FIG. 1 or step S21 of FIG.

Unlike the single-layer structure of a general knitted fabric for the purpose of high-density tricot knitting in manufacturing the tricot suede raw fabric in the step S1 of FIG. 1 or S21 of FIG. 2, in the present invention, ground yarn and plush yarn.

The ground yarn is a fiber layer that serves to hold the hair formed by the plush yarn after raising and shearing (S2, S22). It prevents loss of the softness of the product while preventing the dropping of the product. It is composed of thickness and material which can not be used.

In the double structure of the tricot suede raw fabric, the plush yarn is a fiber layer formed by raising and shearing (S2, S22), which is a part which influences the touch feeling of the product when used, In particular, according to the present invention, by making chemical microfabrication process (S6, S23), microfiber of 0.05 ~ 0.06 denier is made to provide excellent touch feeling.

The tricot suede life support unit is constructed with a tricot warp knitting machine so that the knot density becomes 32 ~ 37 needle gauge. Such kneading densities provide a relatively high densification by forming the needle gauge at a level comparable to about 30 gauge in a conventional warp knitting machine to a relatively high density.

In the present invention, a ground yarn for spun suede fabrics is prepared using a ground yarn and a plush yarn yarn, a polyester yarn of 40 to 60 denier is used for a ground yarn, For the plush yarn, 60 to 80 denier spun yarn is used with 65 to 85 denier sea-island yarn.

The 65-85 denier islands are eluted by caustic soda (NaOH), which is a sea water (dissolution type) solvent used in weight reduction, to form a sea-level fiber with a number of microfibers of 0.05-0.06 denier.

In the present invention, after obtaining the double support structure, a raising and shearing process (S2, S22) is performed in which a loop of a plush yarn is set up and shirred so as to be brushed.

The steps of S2 and S22 of the rising and sharing steps are a step of setting a loop on the flushing yarn of the double structure supporting unit using a buffing machine and cutting the loop into a shearing machine. At this time, securing the uniformity of the length of the shade of the plush yarn, the cut shape, and the length is important for forming a uniform surface of the appearance.

Further, in the production of the high-density and high-sensitivity tricot suede of the present invention, there is a limit to the degree of densification as required for transportation due to its characteristic features. In the present invention, the limit of densification according to the present invention is chemically And a high-density contouring technique is introduced.

The shrinkage (S3, S24) in the manufacturing procedure of Figs. 1 and 2 corresponds to this.

In the present invention, in order to achieve a high density of a suede fabric for allowing the ground yarn to properly hold the plush yarn, a certain amount of a water-squeezing agent is added to the ground by a mangle- High-temperature organs aged at a temperature of 50 to 80 ° C for 2 to 3 hours, and then subjected to a subsequent drying step to shrink 20 to 40%, thereby achieving high shrinkage processing. At this time, the concentrate concentration is 35 to 45% o.w.s, and the high-temperature organs aging at the above conditions are allowed to uniformly infiltrate the texture of the fabric, thereby allowing the fabric to shrink uniformly.

Such a high-density processing technique of the present invention is a fiber processing method in which the texture of the fabric is uniformly densified by changing the fiber structure by chemical treatment of the woven fabric. Compared with the conventional method of shrinking the fabric in a liquid dyeing machine, which has been realized as a densification method using a conventional shoemaker, it is possible to infiltrate a certain amount of shoemaking agent through the process of dipping and squeezing, thereby reducing water and energy, It is eco-friendly because it can drastically reduce the amount.

Also, in the present invention, a weight reduction process is performed so as to improve the touch feeling on the flushy yarn having the sea-island yarn.

The weight reduction process is performed in step S6 of FIG. 1 and step S23 of FIG.

For the development of 0.05 ~ 0.06 denier micro-scale fineness for flushing yarn so as to have a good touch feeling, caustic soda dosage of 10 ~ 20g / l as a sea water solvent, high temperature aging temperature 40 ~ 60 ℃, So that the sea-island yarn constituting the suede brushed of the plush yarn is formed by the segregation of the island by the leaching by caustic soda. And residual caustic soda after the weight loss may cause deterioration of physical properties. Therefore, to remove residual caustic soda effectively, it is hot water for 30 ~ 150 minutes at 110 ~ 130 ℃.

When the amount of caustic soda is more than 20 g / l, the fabric tends to melt. When the caustic soda is less than 10 g / l, the leaching of the sea-island yarn is not properly performed.

In the present invention, the polyurethane coating agent, which is essentially used in the production of tricot suede for high sensitivity / high density transportation, is realized as an optimal polyurethane considering durability, sensitivity and dye reducibility.

Most of the manufacturing methods of artificial leather use a solution type polyurethane resin, that is, a "polyurethane-organic solvent solution". Usually, a solution type polyurethane resin is applied on a substrate such as a fabric, a knitted fabric, or a nonwoven fabric and on a release paper. In addition, the use of organic solvents is inevitable in the production of polyurethane synthetic leather in the process. The use of such organic solvents is causing global environmental problems, and since organic solvents are known as carcinogenic substances, synthetic leather It is harmful to the human body.

At present, studies on the production of synthetic leather using a solvent-free polyurethane are underway, but it is difficult to produce suitable raw materials, difficulty of the manufacturing process due to rapid curing of raw materials, non-uniformity of products, It has not been practically used due to problems such as deterioration of quality.

In the present invention, water-based polyurethane impregnation process enables human-affinity and surface functionalization using nanotechnology to be applied, and it is possible to secure competitiveness in terms of emotional, physical and economic aspects.

General water-soluble polyurethanes are not much advantageous than solvent-based ones because of the limitations of water-dispersing agents in terms of functionality and cost and complicated manufacturing processes. However, Is a trend that is remarkably increasing.

The water-soluble polyurethane to be applied in the present invention has a greater change in physical properties than the commonly used solvent-type polyurethane and can not stabilize the production technology, thereby deteriorating the quality of the product. In the present invention, Thereby improving the physical properties of the urethane.

In the present invention, a water-soluble polyurethane coating material containing water-soluble polyurethane as a main component is prepared, and tricot suede is impregnated with the water-soluble polyurethane coating agent in the processes (S5 and S26) of 'aqueous polyurethane impregnation' shown in FIGS. 1 and 2 Thereby forming a coating film on the tricot suede.

The water-soluble polyurethane coating agent used in the present invention is prepared by mixing a spherical silica nanosol having a size of 1 to 1,000 nm and a silica nanostructure having a size of 0.9 to 1.0 wt% with a water-soluble polyurethane at a concentration of 3 to 10 wt% .

The nanocomposite technology using the silica nanosol as embodied in the present invention has a very small particle size and thus has a much larger specific surface area than that of the other fillers used, and the mechanical properties of the water-soluble polyurethane (tensile strength, elastic modulus, , Abrasion resistance, etc.) and thermal properties (heat distortion temperature, heat stability, etc.).

The processes which have not been explained in the processes of FIGS. 1 and 2 will be briefly described.

The steps S4 and S25 of the column setting (explosion) in FIGS. 1 and 2 are performed such that the width of the fabric becomes narrow and irregular due to refining, shrinkage processing, or the like, so that the width of the fabric becomes a predetermined processing width As the processing step, an explosion dryer or a tenter frame is used.

The processing steps (S10 and S29) in Figs. 1 and 2 are the steps of performing water repellent processing and flame-retarding processing in the present invention. In the present invention, the water- Nano-sol / fluorine water repellent agent 10% / 4% ows) is used. In performing the flame retardant processing, the flame retardant is processed to contain 5% ows.

The polishing process (S8, S27) of FIGS. 1 and 2 is similar to the process of raising and shearing, and is a process of rebuilding the surface fibers.

In the blushing process (S10, S30) in FIGS. 1 and 2, when the brushed of the flushing yarn is straight uprightly, the appearance of the product is good and a comfortable touch feeling can be obtained. .

Although not mentioned in the present invention, in the case of a squeezed fabric, the general refining is performed before the shrinking process (S3, S24), and the refining process may not be performed if the refining process is unnecessary.

The following table shows the evaluation items of the products manufactured by the manufacturing method of the tricot suede of the present invention and is similar in performance level to those of the world's top-ranking countries or holders, and is much better in terms of tear strength and tensile strength, There is a great significance in that no volatile organic compounds [VOCs] are detected at all.

In FIGS. 3A and 3B, using the tricot suede for high-density transportation manufactured according to the manufacturing method of the present invention, a sample of automobile car seat, information communication device, and mobile phone case is sampled It is a picture.

The high density tricot suede of the present invention has a more luxurious appearance than the nonwoven suede, has excellent shape stability due to the ground yarn texture, and is capable of realizing full feeling by the brushed texture.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the scope of claims and equivalents thereof.

The present invention is primarily applied to a car seat for transportation and various other applications. As the material for clothing, shoes, outer garments, and the like can be used. Interior materials can be used for dustproof curtains, furniture curtains, home textiles, etc., and industrial materials can be used for bags, abrasives and the like.

(S1) (S21)
(S3) (S24) - Shrinkage process
(S5) (S26) - aqueous polyurethane impregnation process
(S6) (S23) - Weight reduction process

Claims (5)

In the method for producing tricot suede,
The tricot suede products are manufactured by performing the processes of raising and raising and raising and sharing, shrinkage, heat setting (infiltration), aqueous polyurethane impregnation, weight loss, drying, polishing, dyeing, processing and brushing. ,
In the process of obtaining the raw paper, it is possible to use a ground yarn and a plush yarn serving as a bristle in order to catch the grain by using 40 to 60 denier polyester yarn and 65 to 85 denier sea- A tricot suede raw material having a double structure was obtained,
In the process of shrinkage, a certain amount of the water-absorbing agent is infiltrated into the suede fabric through the dipping process and the squeezing process, and 20 to 40% of the initial stage is aged at a temperature of 50 to 80 ° C for 2 to 3 hours, High shrinkage of the ground yarn causes the ground yarn to hold the floss yarn properly,
In the weight reduction process, a caustic soda injection amount of 10 to 20 g / l, a high-temperature aging temperature of 40 to 60 캜, and a maintenance time of 1 to 3 hours so that the touch feeling of the plush yarn is excellent, To make the sea-island yarn constituting the suede bristle of the plushy yarn to be formed into the sea-likeness yarns having a denier micro-fineness of 0.05 to 0.06, and to remove residual caustic soda after the weight reduction, Wherein the high-temperature water is washed for 30 to 150 minutes.
In the method for producing tricot suede,
The tricot suede product is manufactured by performing the process of raising and shining → raising and sharing → weight loss → shrinkage → heat setting (infiltration) → aqueous polyurethane impregnation → polishing → dyeing → processing → blushing,
In the process of obtaining the raw paper, it is possible to use a ground yarn and a plush yarn serving as a bristle in order to catch the grain by using 40 to 60 denier polyester yarn and 65 to 85 denier sea- A tricot suede raw material having a double structure was obtained,
In the process of shrinkage, a certain amount of the water-absorbing agent is infiltrated into the suede fabric through the dipping process and the squeezing process, and 20 to 40% of the initial stage is aged at a temperature of 50 to 80 ° C for 2 to 3 hours, High shrinkage of the ground yarn causes the ground yarn to hold the floss yarn properly,
In the weight reduction process, a caustic soda injection amount of 10 to 20 g / l, a high-temperature aging temperature of 40 to 60 캜, and a maintenance time of 1 to 3 hours so that the touch feeling of the plush yarn is excellent, To make the sea-island yarn constituting the flushy yarn ground yarn bristles to be formed into the sea-island yarns of 0.05 to 0.06 denier ultrafine fineness, and to remove residual caustic soda after the weight reduction, Wherein the high-temperature water is washed for 30 to 150 minutes.
The aqueous polyurethane according to claim 1 or 2, wherein the aqueous polyurethane used in the aqueous polyurethane impregnation is a mixture of a spherical silica nanosol having a size of 1 to 1,000 nm and a silica nanostructure having a size of 0.9 to 1.0 wt% By weight based on the weight of the water-soluble polyurethane, and 3 to 10% by weight based on the weight of the water-soluble polyurethane, wherein the aqueous urethane coating agent is provided with a self-cleaning function capable of preventing contamination.
The method of any one of claims 1 to 3, wherein the double-structure suede stock is firstly densified with a needle density of 27 to 37 needle gauge through a tricot warp knitting machine, Wherein the second high density is achieved by the chemical shrinkage of the high density tricot suede.
The high-density tricot suede for transportation according to claim 1 or 2, characterized in that a spun yarn of 60 to 80 denier is used for the plush yarn together with the sea-island yarn of 65 to 85 denier Gt;

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