KR20170079480A - Antimicrobial artificial leather and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a synthetic leather surface layer in which fine patterns are regularly or irregularly formed; Base fabric; And an adhesive layer for bonding the surface layer and the fabric, and having semi-permanent antibacterial properties, and a process for producing the same.

Description

TECHNICAL FIELD The present invention relates to an antimicrobial artificial leather and a manufacturing method thereof,

The present invention relates to an artificial leather having an antibacterial function and a process for producing the same.

Leather that is frequently encountered in real life is divided into natural leather and artificial leather. Natural leather is derived from animal, and has a disadvantage in that it is superior in texture, durability, high quality and high quality compared with artificial leather, but is expensive and has a limited production amount. Therefore, research and development to manufacture artificial leather having the same texture and durability as natural leather has been continued, and artificial leather has been widely used throughout the industrial field due to its relatively low price and ease of designing various functions and designs compared to natural leather have.

Such leather, whether natural or artificial leather, is always exposed to bacteria by its surface, which makes it easy to reproduce the bacterium, which can harm the human body. Accordingly, various methods for imparting antimicrobial properties to artificial leather have been attempted. For example, there is a method of forcibly injecting a liquid mixed with a dyeing solution into an artificial leather surface by pulverizing Ondol, elvan, loess, etc., a method of mixing and drying urushiol components extracted from lacquer with a coating agent and drying, A method of applying a coating liquid in which nanoparticles are dispersed, and the like have been proposed. Although these methods can attain antimicrobial activity to a certain extent, inorganic materials such as quartz and loess can be easily removed during daily life or washing, and the antibacterial function is quickly disappeared. The urushiol extract is gradually lost in high temperature and washing, Disappear. In addition, when urushiol is used, urushiol must be extracted from the lacquer, which complicates the process. The metal nanomaterials are continuously exposed to harmfulness, and are difficult to be uniformly dispersed in the coating liquid because of difficulty in stable dispersion, and are difficult to maintain their functions because they are easy to react.

Patent Document 1: Korean Patent Laid-Open No. 10-2007-0117915 Patent Document 2: Korean Patent Publication No. 10-2000-0017782 Patent Document 3: Korean Patent No. 10-0745685

Accordingly, the present invention is to provide a synthetic leather having semi-permanent antimicrobial properties that does not lose its antimicrobial function due to the passage of time or an external force, and a method for producing the same. It is also intended to provide a manufacturing method that can be applied as it is to existing artificial leather processes.

In order to solve the above problems, the present invention provides an artificial leather surface layer having a fine pattern with a pattern height of 1.0 to 4 탆, a pattern length of 1 to 20 탆, a pattern width of 1 to 2 탆 and a pattern interval of 1 to 2 탆. Base fabric; And an adhesive layer for bonding the surface layer and the fabric.

Preferably, the fine pattern formed on the synthetic leather may be a regular patterned regular pattern.

Preferably, the fine pattern formed on the artificial leather may be an irregularly arranged pattern.

Preferably, the synthetic leather surface layer may comprise one or more urethane, vinyl chloride, carbonate, epoxy or olefin resin materials.

Preferably, the base fabric may be a woven, knitted or nonwoven fabric of natural fibers, synthetic fibers or blend fibers thereof.

Preferably, the artificial leather surface layer may be one which imparts texture to the surface, control slip, control gloss, impart a three-dimensional effect, or impart color.

According to another aspect of the present invention, there is provided a method of manufacturing a semiconductor device, comprising the steps of: (a) preparing a release paper on which a fine pattern is formed; (b) coating a resin for artificial leather skin on the release paper to produce a skin having a fine pattern; (c) coating an adhesive on the prepared skin and drying to form an adhesive layer; And (d) laminating the base fabric on the adhesive layer and laminating.

According to the present invention, since artificial leather contacting with the skin does not use a special substance such as a chemical substance, it is free of harmfulness to the human body, and the antimicrobial property is imparted by the fine pattern.

In addition, it does not need any special process to manufacture artificial leather, and it can be applied to existing artificial leather processing.

In addition, the artificial leather produced by the present invention can be applied to sofas, chairs, and wallpapers of hospitals having many pathogens and is effective for hygiene because of its excellent antimicrobial effect. It is also applied to furniture and wallpaper used for places where many people come and go, .

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a cross-sectional view showing a structure of a synthetic leather having a fine pattern formed therein according to an embodiment of the present invention; FIG.
2 is an enlarged view of a cross-sectional structure of a fine pattern formed according to an embodiment of the present invention.
3 is an SEM photograph showing a fine pattern shape (a) of a synthetic leather surface on which a fine pattern according to the present invention is formed and a cross section (b) of a synthetic leather.
4 is a photograph showing a state in which a surface of an artificial leather having a fine pattern formed thereon is observed with the naked eye according to an embodiment of the present invention. The first photograph shows the artificial leather with the hologram effect, the second is the artificial leather with the matte grain, and the third is the naked eye with the matte synthetic artificial leather, showing that the pattern is microscopic and can not be visually confirmed.

Hereinafter, the present invention will be described in detail with reference to the drawings and embodiments. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.

TECHNICAL FIELD The present invention relates to an artificial leather having semi-permanent antimicrobial properties imparted to artificial leather that is in direct contact with skin, and a method for producing the same.

According to one aspect of the present invention, there is provided a method of manufacturing an artificial tooth having a fine pattern having a pattern height (h) of 1.0 to 4 탆, a pattern length of 1 to 20 탆, a pattern width (w) of 1 to 2 탆, Leather surface layer; Base fabric; And an adhesive layer for bonding the surface layer and the fabric. It is known that fine patterns are difficult to form due to the size of several to several tens of micrometers, which is hard to see by the naked eye, and it is known that it is possible to use special equipment or materials in order to give a fine pattern to artificial leather. The present inventors completed the present invention by continuing research and development on a method capable of forming a fine pattern while using the artificial leather process as it is.

Fig. 1 is a cross-sectional view showing the structure of artificial leather according to an embodiment of the present invention. Artificial leather 1 comprises a surface layer 11 having a fine pattern, an adhesive layer 12, and a base fabric 13. The fine pattern has a pattern height (h) of 1.0 to 4 탆, preferably 1.6 to 2.5 탆 and a pattern width (w) of 1 to 2 탆, a pattern interval (d) of 1 to 2 탆, A pattern length of 1 to 20 탆, and preferably 2 to 14 탆. The artificial leather according to the present invention can ensure antimicrobial activity through the fine pattern of the above-mentioned predetermined shape condition, and the antimicrobial effect according to the formation on the fine pattern can be confirmed by the following test examples.

According to one embodiment of the present invention, as shown in Fig. 3, a fine pattern is formed on the artificial leather surface layer 11 at a pattern height of 1.6 to 2.5 mu m, a pattern length of 2 to 14 mu m, a pattern width of 1 to 2 mu m, 1 to 2 mu m. The fine patterns may be formed regularly or irregularly arranged, and preferably, regularly arranged regular patterns.

The artificial leather surface layer 11 corresponds to a so-called artificial leather skin and may comprise one or more urethane, vinyl chloride, carbonite, epoxy or olefin resin materials. Preferably a polyurethane or polyvinyl chloride material.

The base fabric 13 may be a woven, knitted or nonwoven fabric of natural fibers, synthetic fibers or blend fibers thereof, preferably tricot fabric.

The adhesive layer is a layer formed by applying and drying an adhesive, and an adhesive used in the manufacture of a conventional artificial leather can be appropriately applied.

The artificial leather on which the fine pattern according to the present invention is formed may have other functions in addition to antibacterial properties. For example, a desired touch, slip, and gloss can be imparted through a surface texture control process, a slip control process, or a gloss control process for controlling the degree of roughness of a synthetic leather surface, have.

According to another aspect of the present invention, there is provided a method of manufacturing a semiconductor device, comprising: (a) preparing a release paper in which a fine pattern is formed; (b) coating a resin for artificial leather skin on the release paper to produce a skin having a fine pattern; (c) coating an adhesive on the prepared skin and drying to form an adhesive layer; And (d) laminating the base fabric on the adhesive layer and laminating the antimicrobial artificial leather. Each step will be described in detail.

(a) preparing a release paper on which a fine pattern is formed

The fine pattern is formed by reversely transferring the release paper using a fine pattern mold. The release paper may be made of paper or a film material, and various kinds of release paper may be used without any particular restriction on gloss or grain shape.

It is preferable that the fine pattern has a pattern height (h) of 1.0 to 4 탆, a pattern length of 1 to 20 탆, a pattern width (w) of 1 to 2 탆 and a pattern spacing (d) of 1 to 2 탆. In addition, the fine patterns may be regularly or irregularly arranged, preferably regularly arranged regular patterns.

(b) preparing a skin having a fine pattern formed thereon

The artificial leather skin resin is coated on the release paper on which the fine pattern prepared in the step (a) is formed and dried to prepare a skin having a fine pattern.

Resin for artificial leather skins may comprise one or more urethane, vinyl chloride, carbonate, epoxy or olefin resin materials. Preferably a polyurethane or polyvinyl chloride material.

When the resin is coated, it is preferable to form a coating gap of about 0.2 to 0.4 mm to form a skin. More preferably, it is better to form the skin by coating twice with a coating gap of about 0.2 to 0.4 mm. The drying is preferably performed at about 90 to 110 DEG C for about 1 to 5 minutes.

(c) forming an adhesive layer

An adhesive is coated on the skin prepared in the step (b) and dried to form an adhesive layer. As the adhesive, an adhesive used in the production of conventional artificial leather may preferably be used.

(d) laminating the base fabric

The base fabric is placed on the adhesive layer formed in the step (c) and lapped. The lapping can be carried out using a squeeze roll, through which artificial leather is produced.

The base fabric may be a fabric, a knitted fabric or a nonwoven fabric made of natural fibers, synthetic fibers or blend fibers of these fibers, preferably a tricot fabric may be used. When the release paper is removed after the step (d), an antimicrobial artificial leather on which a fine pattern is formed can be obtained.

In addition, the artificial leather manufacturing method according to the present invention may further include processing steps for imparting additional functions such as surface texture control, slip control, gloss control, dimensional sensation and coloring.

The antimicrobial artificial leather manufacturing method of the present invention can use the existing urethane artificial leather manufacturing method as it is, and it is possible to secure antimicrobial properties by giving a fine pattern to release paper which gives grain and gloss to the skin layer. That is, the artificial leather produced by the present invention has an antimicrobial function due to the fine pattern formed on the surface thereof, and can be used as it is, so that there is no restriction of the material and the process, and it is economical in terms of cost .

The present invention will now be described more specifically with reference to the following examples, but it should be understood that the present invention is not limited to the following examples, and those skilled in the art Various changes and modifications will be possible.

≪ Example 1 >

Preparation of fine patterned polyurethane artificial leather:

25 parts by weight of a black pigment was put on a release paper having a fine pattern formed thereon and D-ACE-8600 clear (Song Jung Chemical Co., Ltd.) as a resin for a polyurethane skin, coated with a coating gap of about 0.2 mm, coated at 110 캜 for about 1 minute And dried to prepare a skin. 30 parts by weight of methyl ethyl ketone and 5 parts by weight of dimethylformamide were added to 100 parts by weight of D-ACE-6255 (Song Jung Kagaku) as a solvent, and 14 parts by weight of CLA300 (Song Jeung Chemical) and 7 parts by weight of N-474A The resulting two-part adhesive was coated on the skin prepared in the previous step by applying a coating gap of about 0.3 mm and dried at 110 캜 for about 30 seconds. The tricot fabric was applied as a base to the semi-dried skin and pressed to produce a polyurethane artificial leather having a fine pattern.

≪ Example 2 >

Preparation of fine patterned polyvinyl chloride (PVC) artificial leather:

100 parts by weight of Vinnolit P60 as a PVC casting resin, 60 parts by weight of diisodecyl phthalate (DIDP) as a plasticizer, and 4 parts by weight of a black pigment were put on a release paper on which a fine pattern was formed, , And dried at 110 DEG C for about 2 minutes to prepare a skin. The prepared skin was coated with an acrylic adhesive with a coating gap of about 0.3 mm and dried at 110 ° C for about 30 seconds. The tricot fabric was put as a base on the semi-dried skin and pressed to produce a PVC artificial leather having a fine pattern.

Test example: Antibacterial effect test

An antimicrobial test on the artificial leather made of polyurethane with fine patterns prepared in Example 1 was conducted by FITI research institute. The comparative group used in the antibacterial test was the same product as in Example 1, in which the artificial leather made from the general release paper AR241 was killed and the urethane resin used was the same. Strain # 1 used as the test strain is Staphylococcus aureus ATCC6538P, and strain # 2 is Klebsiella pneumoniae ATCC 4352. The test method was JIS Z 2801: 2010, film adhesion method. The standard film was a Stomacher 400 POLY-BAG. The test results are shown in Table 1.

In Table 1, the number of bacteria is the number of bacteria / cm 2, and the value of the antibacterial activity is a log value. The antimicrobial activity value (R) is log (B / C), which is obtained by subtracting log (C / A) from log (B / A). B is the number of bacteria in the comparative group (average value) after incubation for 24 hours, and C is the number of bacteria (average value) of the test specimen in Example 1 after 24 hours of incubation.

According to the above Table 1, it was confirmed that the polyurethane artificial leather formed with the fine pattern according to the present invention had an excellent antibacterial activity as compared with the polyurethane artificial leather having no fine pattern.

1: Artificial leather
11: Surface layer
12: Adhesive layer
13: Base fabric

Claims (13)

An artificial leather surface layer having a pattern height of 1.0 to 4 탆, a pattern length of 1 to 20 탆, a pattern width of 1 to 2 탆 and a pattern interval of 1 to 2 탆;
Base fabric; And
And an adhesive layer joining the surface layer and the fabric.
The method according to claim 1,
Wherein the fine pattern is a regular pattern arranged regularly.
The method according to claim 1,
Wherein the fine patterns are irregularly arranged patterns.
The method according to claim 1,
Wherein the artificial leather surface layer comprises one or more urethane, vinyl chloride, carbonite, epoxy or olefin resin materials.
The method according to claim 1,
Wherein the base fabric is a fabric, a knitted fabric or a nonwoven fabric made of natural fibers, synthetic fibers or blend fibers of these fibers.
The method according to claim 1,
Wherein the artificial leather surface layer is provided with a feeling of surface, slip control, gloss control, three-dimensional feeling, or coloring.
(a) preparing a release paper on which a fine pattern is formed;
(b) coating a resin for artificial leather skin on the release paper to produce a skin having a fine pattern;
(c) coating an adhesive on the prepared skin and drying to form an adhesive layer; And
(d) placing the base fabric on the adhesive layer and lapping.
8. The method of claim 7,
Wherein the fine pattern has a pattern height of 1.0 to 4 占 퐉, a pattern length of 1 to 20 占 퐉, a pattern width of 1 to 2 占 퐉, and a pattern spacing of 1 to 2 占 퐉.
8. The method of claim 7,
Wherein the fine pattern has regular patterns arranged regularly.
8. The method of claim 7,
Wherein the fine pattern comprises irregularly arranged patterns.
8. The method of claim 7,
Wherein the resin for artificial leather skins comprises at least one of urethane, vinyl chloride, carbonate, epoxy or olefin resin.
8. The method of claim 7,
Further comprising the step of removing the release paper after the step (d).
8. The method of claim 7,
Further comprising a processing step for performing a surface texture control, a slip control, a gloss control, a three-dimensional effect or a coloring after the step (d).

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