KR102179352B1 - Eco-friendly antibacterial fabric with waterproof and water-repellent coating and method for manufacturing the same - Google Patents

Abstract

The present invention relates to an eco-friendly antibacterial fabric with waterproof and water-repellent coating on each side thereof, and a method of manufacturing the same. Different coating treatments on each side allow different use of the fabric according to the purpose. Also, the fabric itself has antibacterial properties, so even if the waterproof and water-repellent coating layer is damaged by impact and abrasion that may occur during washing or in daily life, bacteria or mold do not grow.

Description

Water-repellent and water-repellent eco-friendly antibacterial fabric and its manufacturing method {ECO-FRIENDLY ANTIBACTERIAL FABRIC WITH WATERPROOF AND WATER-REPELLENT COATING AND METHOD FOR MANUFACTURING THE SAME}

The present invention relates to an eco-friendly antibacterial fabric and a method of manufacturing the same, each of which has a waterproof and water repellent coating on both sides of the fabric.

As a fabric for making a bag, it is common to use a canvas fabric that is tough and less deformable, and the canvas fabric was originally limited to cotton and hemp fabrics, but recently woven with chemical fibers has also been used.

Canvas fabrics made of natural fibers are sensitive to humidity, and have the disadvantage of expanding in high humidity weather and shrinking in dry weather.In order to improve this disadvantage, nylon or rayon, which is low in moisture absorption and inexpensive, is used. Synthetic fibers were used. However, compared to natural fibers, synthetic fibers still have problems such as poor quality and easy deformation.

Therefore, attempts to overcome these limitations by waterproofing canvas fabrics made of natural fibers have been continuing for a long time, but the problem of mold and bacteria growth inside the waterproof coating layer cracks or cracks due to moisture remains a problem to be solved continuously. have.

In order to solve the above problems, chemically synthesized antimicrobial agents have been used, but anxiety about the use of chemical antimicrobial agents in products closely used in real life continues to arise.

Korean Patent Registration 10-0612294

An object of the present invention is to provide a waterproof and water-repellent eco-friendly antibacterial fabric and a manufacturing method thereof.

Another object of the present invention is to provide a method of utilizing the fabric, such as bags, clothes, and tents.

An aspect of the present invention is (A) preparing a canvas fabric made of cotton and hemp fiber; (B) applying a polyurethane waterproof coating on one side of the fabric; And (C) performing a water-repellent treatment using a water-repellent release paper on the opposite side of the polyurethane waterproof coating. It provides a method for producing a double-sided coated fabric containing.

Specifically, the canvas fabric made of the cotton and hemp fibers of step (A) is (a-1) the step of adding 10 to 20 times by weight of purified water to the hemp and cotton fibers and soaking for 24 hours; (a-2) heating the cotton and hemp fiber material after the process called at 80 to 140°C for 3 to 4 hours; (a-3) To the cotton and hemp fiber, one or more enzymes selected from the group consisting of Flavourzyme, Alcalase, Protease, and Neutrase were added, and 25 to 35 Pre-treatment step of leaving for 24 to 48 hours at ℃; (a-4) With respect to 250 parts by weight of cotton fiber and 250 parts by weight of hemp fiber (linen) on which the pre-treatment step is completed, 20 parts by weight of a microbial mixture is added and aged by shaking culture for 24 to 48 hours at 30 to 34°C. step; And (a-5) ginger ( Zingiber officinale ), parsley ( Petroselinum crispum ), pine tree ( Pinus koraiensis ), cloves ( Syzygium aromaticum ), sage ( Salvia officinalis ), thyme ( Thymus vulgaris ), rosemary ( Salvia rosmarinus ), rhubarb ( Eisenia bicyclis ) and the step of treating the extract of one or more selected natural products from the group consisting of ( gracilaria verrucosa ); may be prepared including, but is not limited thereto.

In addition, specifically, the polyurethane waterproof coating of step (B) may include polycarbonate diol, polyester polyol, triethylamine and polysiloxane and diisocyanate compounds; And a composition for polyurethane coating further comprising dibutyltin dilaurate (DBTDL) as a catalyst and antimony trioxide (SB ₂ O ₃ ) as a flame retardant with a float knife or air knife in a thickness of 70 to 90 g/yds It may be coated with, and hot air-dried at 130 to 150°C for 75 seconds, and then cured at 130 to 170°C for 40 seconds, but is not limited thereto.

In addition, specifically, in the step of water-repellent treatment using the water-repellent release paper of step (C), a water-repellent resin is applied on a release paper in an amount of 130 g/m ² to 230 g/m ² , and 130 To form a film by drying at a temperature of 150° C. for 3 to 10 minutes, and the water-repellent resin includes 15 parts by weight of hydrocolloid, 13 parts by weight of pyrometric acid, 7 parts by weight of nonylphenol ethoxylate, It may be prepared including 7 parts by weight of hydroxyproline, 5 parts by weight of trimethylbenzyl ammonium bromide, 5 parts by weight of dichlorodimethylsilane, and 5 parts by weight of a crosslinked polyacrylate polymer, but is not limited thereto.

Another aspect of the present invention provides a double-sided coated fabric manufactured by the above manufacturing method.

It was confirmed that the coated fabric was waterproof and water-repellent coated on both sides, respectively, to have excellent water resistance, abrasion resistance, and washing resistance, and also showed excellent antibacterial activity.

The double-sided coating fabric of the present invention has excellent durability and waterproof properties, and is characterized in that it can be easily applied in fields requiring waterproofness and durability, such as bags, clothes, and tents.

The canvas fabric of the present invention is waterproof and water-repellent coated on both sides of the fabric, so that the use of the fabric can be varied according to the purpose, and the fabric itself has antibacterial properties, so it is waterproof and water-repellent by impact and abrasion that may occur during washing or daily life It is characterized in that even if the coating layer is damaged, bacteria or mold do not develop.

In addition, the fabric of the present invention is characterized by solving the problems of functional destruction and environmental pollution of natural fibers caused by a method using chemicals by going through an enzyme treatment process and a microbial treatment process in the manufacturing process.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be deduced from the configuration of the invention described in the detailed description or claims of the present invention.

Hereinafter, the present invention will be described in detail by examples. However, the following examples are only illustrative of the present invention, and the present invention is not limited by the following examples.

Example 1. Manufacturing process of eco-friendly antibacterial fiber using enzymes and microorganisms

Prior to manufacturing the eco-friendly antibacterial fiber of the present invention, all materials were prepared in a washed state to remove contamination such as foreign matter and mold.

10 to 20 times by weight of purified water was added to hemp and cotton fibers, and the so-called process was carried out for 24 hours.

The cotton and hemp fiber material after the above-described process was heated at 80 to 140°C for 3 to 4 hours. Thereafter, the eco-friendly fiber material subjected to the heating step was allowed to stand at room temperature and allowed to cool sufficiently for 10 hours or more.

After sufficient cooling was completed, one or more enzymes selected from the group consisting of Flavourzyme, Alcalase, Protease, and Neutrase were added to the cotton and hemp fiber, and 25 to The pre-treatment step was carried out to stand at 35°C for 24 to 48 hours. Specifically, at this time, 0.1 to 5 parts by weight of each enzyme may be added relative to 100 parts by weight of each material of hemp and cotton fiber, and in this example, 2.5 parts by weight of protease and 2.5 parts by weight of neutraase were added to perform the pretreatment step. .

To 250 parts by weight of cotton fiber and 250 parts by weight of hemp fiber (linen) on which the pre-treatment step was completed, 20 parts by weight of a microbial mixture was added and aged by shaking culture at 30 to 34° C. for 24 to 48 hours.

At this time, the microorganism mixture is prepared by adding 5 to 10 parts by weight of Bacillus subtillis , 5 to 10 parts by weight of Lactobacillus salivarius, and 3 to 8 parts by weight of Micrococcus roseus Based on 100 parts by weight of a probiotic mixture, 10 parts by weight of pectin, 10 parts by weight of fructooligosaccharide, 7 parts by weight of arabinogalactan, and 8 parts by weight of lactose were mixed and aged at room temperature for 2 to 4 hours.

Meanwhile, ginger ( Zingiber officinale ), parsley ( Petroselinum crispum ), pine ( Pinus koraiensis ), cloves ( Syzygium aromaticum ), sage ( Salvia officinalis ), thyme ( Thymus vulgaris ), rosemary ( Salvia rosmarinus ), rhubarb ( Eisenia bicyclis ) and After mixing one or more natural products selected from the group consisting of gracilaria verrucosa , an extract was prepared. In this example, thyme ( Thymus vulgaris ), rosemary ( Salvia rosmarinus ), rhubarb ( Eisenia bicyclis ), and gracilaria verrucosa were mixed in a weight ratio of 1:1:3:4, respectively, and then 75% ethanol was used at 90°C. The extract was prepared by reflux extraction for 4 hours and then concentration under reduced pressure, but the present invention is not limited thereto.

The natural product-derived extract was aged for 6 to 12 hours at 20 to 25°C on the aging hemp and cotton fibers, and the natural product-derived extract was deposited on the hemp and cotton fibers.

The hemp and cotton fibers on which the above-described process was completed were finally subjected to a post-treatment process of immersing in hot water. For the post-treatment process, the material was immersed in hot water containing a nonionic surfactant at 80° C. or higher and maintained for 30 minutes to obtain an eco-friendly cotton fiber treated with microorganisms of the present invention.

Example 2. Preparation of water-repellent-treated release paper

In order to perform the coating of the water-repellent side of the fabric of the present invention, a water-repellent-treated release paper was prepared.

Specifically, the release paper may be supplied in the form of a roll, and any method can be used without limitation as long as it is a method of forming a film by applying heat by applying a resin for water-repellent treatment on the release paper using a commonly used method. It may be, for example, a wet lamination method or a semi dry lamination method, but is not limited thereto.

The laminating refers to a technology that protects the surface and enhances strength and stability by overlaying one or more thin layers on the target fabric.

More specifically, in the step of applying the resin to the release paper, first, the water-repellent resin was applied to the release paper in an amount of 130 g/m ² to 230 g/m ² , and dried at a temperature of 130 to 150° C. for 3 to 10 minutes. , Most specifically, it was applied in an amount of 170 g/m ² to 200 g/m ² and then dried at 145° C. for 5 to 7 minutes to form a film.

The water-repellent resin for the water-repellent coating is hydrocolloid 15 parts by weight, pyromethic acid 13 parts by weight, nonylphenol ethoxylate 7 parts by weight, hydroxyproline 7 parts by weight, trimethylbenzyl ammonium bromide 5 parts by weight, di It is prepared including 5 parts by weight of chlorodimethylsilane and 5 parts by weight of a crosslinked polyacrylate polymer, and if necessary, in order to further enhance the functional properties of the resin for water repellent coating, based on 100 parts by weight of the resin mixture for water repellent coating 10 parts by weight of polyethylene glycol phenyl ether and 15 parts by weight of 2-phenylimidazole may be further added.

In this embodiment, the resin for the water-repellent coating was prepared by including both polyethylene glycol phenyl ether and 2-phenylimidazole, but is not limited thereto.

At this time, the hydrocolloid is added to strengthen adhesion by maintaining adhesion for a long time by forming a gel and maintaining a wet state, and may serve to enhance waterproof and water repellent functions.

The pyrometric acid is added to suppress heat shrinkage and reinforce slip properties to maintain sticky resistance as well as to suppress deformation of the coating layer, and to perform a function of softening the resin to maximize adhesion of the coating layer.

The nonylphenol ethoxylate is added in order to increase the compatibility with the resin while providing a surface-active function, and to obtain an antioxidant effect.

When the hydroxyproline is heated during the manufacturing process, it is gelatinized and is added to increase the flexural strength of the coating layer to make it flexible, thereby suppressing cracks due to bending of the water-repellent coating layer and achieving a long life.

The trimethylbenzyl ammonium bromide is added to promote the reaction to promote curing stability and to maintain the strong bonding property of the coating film.

The dichlorodimethylsilane is a material showing very strong hydrophobicity because it has two chlorine atoms, which have the second largest electronegativity after fluorine (F), and is excellent in waterproof and water repellency and is useful for maintaining ventilation.

The crosslinked polyacrylate polymer was used to maximize the bonding property with the fabric to increase the interlocking so that interfacial separation does not occur.

Non-limiting examples of the crosslinked polyacrylate polymer may include cationic or nonionic polymers.

Non-limiting examples of polyacrylamide polymers (including nonionic polyacrylamide polymers including substituted branched or non-branched polymers) include polyacrylamide, isoparaffin and laureth-7, acrylamide and substituted acrylamide And a multi-block copolymer of acrylic acid and substituted acrylic acid.

The polyethylene glycol phenyl ether is added to prevent agglomeration of the components between particles and ensure uniform dispersibility, so that the components exhibiting waterproof and water repellent properties are evenly distributed.

The 2-phenylimidazole is added to reduce the thermal contraction rate during drying, thereby enhancing the thermal stability of the coating solution and increasing the adhesion of the coating layer.

Example 3. Manufacturing process of waterproof and water-repellent fabric

In the fabric of the present invention, a 10-number canvas fabric was woven using the fiber prepared in Example 1, and polyurethane was coated on one side of the fabric for waterproof treatment, and on the other side, Example 2 Water-repellent coating treatment using a release paper (release paper, or release paper) prepared in was made to be waterproof and water-repellent on both sides.

Specifically, the coating composition for the polyurethane coating is composed of polycarbonate diol, polyester polyol, triethylamine and polysiloxane and diisocyanate compounds, and more specifically, 20 to 30 parts by weight of polycarbonate diol, poly 20 to 30 parts by weight of ester polyol and 5 to 10 parts by weight of polysiloxane, 3 to 5 parts by weight of triethylamine, and 50 to 60 parts by weight of a diisocyanate compound, and the diisocyanate compound is hexamethylene diisocyanate (hexamethylene diisocyanate, HDI), isophoron diisocyanate (IPDI), 4,4'-dihexylmethane diisocyanate (4,4'-dihexyl methane diisocyanate, H ₁₂ MDI), hydrogenated xylylene diisocyanate (hydronated XDI, H ₆ XDI) may be selected from one or more.

The polyurethane coating composition may further include 0.01 to 0.03 parts by weight of dibutyltin dilaurate (DBTDL) as a catalyst and 0.1 to 5 parts by weight of antimony trioxide (SB ₂ O ₃ ) as a flame retardant. In the embodiment, 0.01 parts by weight of the catalyst and 0.3 parts by weight of the flame retardant were added to the coating composition, but are not limited thereto.

In this example, the polyurethane coating composition was applied to one side of the fabric prepared in Example 1 in a thickness of 70 to 90 g/yds with a float knife or air knife, and hot air dried at 130 to 150°C for 75 seconds. Then, a waterproof coating was performed by curing at 130 to 170° C. for 40 seconds.

Thereafter, the cured fabric was stabilized at room temperature for 24 hours, and the water-repellent-treated release paper film prepared in Example 2 was attached to the stabilized fabric using a press.

After the attachment was completed, the fabric to which the film was attached was allowed to stand at 60°C to 75°C for 20 to 30 hours to sufficiently stabilize. After that, by separating the release paper from the stabilized fabric, a canvas fabric with water-repellent and water-repellent treatment on both sides was prepared.

Experimental Example 1. Waterproofness check experiment

In order to check the waterproofness of the double-sided waterproofing fabric of Example 3, waterproofing (rainwater method) was performed according to AATCC 35 and KS K 0593.

Briefly, when rainwater was sprayed at a height of 1 foot for 5 minutes, the weight of the absorbent paper attached to the back side of the fabric did not increase at all, and thus passed the above criteria, and even when rainwater was sprayed at a height of 2 feet for 30 minutes for self-reinforced experiments. It was confirmed that the weight increase of the standard absorbent paper did not exceed 1 g, so that the waterproofness of the fabric of the present invention was very excellent.

Experimental Example 2. Washing durability confirmation experiment

In order to confirm that the waterproof coating layer was not damaged even when the double-sided waterproof fabric of Example 3 was washed several times, it was confirmed whether the coating layer after washing 5 times was damaged by applying ISO 6330 mutatis mutandis, resulting in loss of waterproofing ability. It was confirmed that the coating layer was not damaged because water did not leak even after washing twice.

In addition, it was confirmed that the test conditions specified in KSK 0430 for discoloration and discoloration of fabrics during washing, AATCC 61 for water washing, and AATCC 132 for dry cleaning were satisfied.

Experimental Example 3. Antibacterial effect confirmation experiment

The double-sided waterproof fabric of Example 3 is primarily waterproof and water-repellent on both sides, so that it is difficult to proliferate bacteria, and even if the waterproof and water-repellent coating layer is damaged, the fabric is contaminated and conditions for bacterial growth are established, The fabric used for the waterproof fabric is characterized in that it has antimicrobial properties and can suppress the growth of mold and bacteria.

To confirm this, KSK-0693:2011 was applied mutatis mutandis to confirm antimicrobial properties. Specifically, Examples 1 and 3 fabrics sterilized at 121°C in a high temperature and high pressure sterilizer (autoclave), and Comparative Example 1 and standard cotton fabrics in which the coating layer was artificially damaged by scratching the surface of the fabric After artificially damaged Comparative Example 2, Staphylococus aureus and Escherichia coli to be measured were inoculated with 1 x 10 ⁷ and cultured for 20 hours, and then standard cotton swabs Compared with, the reduction rate of bacteriostatics was measured in% and shown in Table 1 below.

division S. aureus (%) E. coli (%) Example 1 99 99 Example 3 100 (not cultured) 100 (not cultured) Comparative Example 1 99 99 Comparative Example 2 65 54

As shown in Table 1, it was confirmed that the waterproof fabric of Example 3 of the present invention not only has excellent antibacterial properties by itself, but also effectively suppresses the growth of bacteria because the fabric itself retains antibacterial properties even if the coating layer is damaged. On the other hand, considering the results of Comparative Example 2, since the coating layer penetrates through the damaged space and allows sufficient bacterial growth, the waterproof fabric manufactured by weaving the antimicrobial fiber of the present invention into a fabric is used for a long time or has high durability during daily use. Seems to be.

The above description of the present invention is for illustrative purposes only, and those of ordinary skill in the art to which the present invention pertains will be able to understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims to be described later, and all changes or modified forms derived from the meaning and scope of the claims and the concept of equivalents thereof should be construed as being included in the scope of the present invention.

Claims (6)

(A) preparing a canvas fabric made of cotton and hemp fibers;
(B) applying a polyurethane waterproof coating on one side of the fabric; And
(C) A water-repellent release paper film is attached to the opposite side of the polyurethane waterproof coating using a press, and the fabric with the film is left at 60°C to 75°C for 20 to 30 hours to stabilize After that, in the method of manufacturing a double-sided coated fabric comprising; separating the release paper film from the fabric to water-repellent the fabric,
The step (A) includes (a-1) adding 10 to 20 times by weight of purified water to hemp and cotton fibers and soaking for 24 hours;
(a-2) heating the cotton and hemp fiber material after the process called at 80 to 140°C for 3 to 4 hours;
(a-3) To the cotton and hemp fiber, one or more enzymes selected from the group consisting of Flavourzyme, Alcalase, Protease, and Neutrase were added, and 25 to 35 Pre-treatment step of leaving for 24 to 48 hours at ℃;
(a-4) With respect to 250 parts by weight of cotton fiber and 250 parts by weight of hemp fiber (linen) on which the pre-treatment step is completed, 20 parts by weight of a microbial mixture is added and aged by shaking culture for 24 to 48 hours at 30 to 34°C. step; And
(a-5) Ginger ( Zingiber officinale ), parsley ( Petroselinum crispum ), white pine ( Pinus koraiensis ), cloves ( Syzygium aromaticum ), sage ( Salvia officinalis ), thyme ( Thymus vulgaris ), rosemary ( Salvia rosmarinus ), rhubarb ( Eisenia bicyclis ) and corsica ( gracilaria verrucosa ) treating an extract of one or more selected natural substances from the group consisting of; a method for producing a double-sided coated fabric containing. delete The method of claim 1,
The polyurethane waterproof coating of step (B),
Polycarbonate diol, polyester polyol, triethylamine, and polysiloxane and diisocyanate compounds; And
A composition for polyurethane coating further comprising dibutyltin dilaurate (DBTDL) as a catalyst and antimony trioxide (SB ₂ O ₃ ) as a flame retardant
A method for producing a double-sided coated fabric by applying it with a float knife or air knife at a thickness of 70 to 90 g/yds, hot air drying at 130 to 150°C for 75 seconds, and then curing at 130 to 170°C for 40 seconds. The method of claim 1,
The step of water-repellent treatment using the water-repellent release paper of step (C),
Including the step of forming a film by applying a resin for water-repellent treatment on a release paper in an amount of 130 g/m ² to 230 g/m ² and drying for 3 to 10 minutes at a temperature of 130 to 150°C,
The resin for water repellent treatment is hydrocolloid 15 parts by weight, pyromethic acid 13 parts by weight, nonylphenol ethoxylate 7 parts by weight, hydroxyproline 7 parts by weight, trimethylbenzylammonium bromide 5 parts by weight, dichlorodimethylsilane 5 parts by weight A method of manufacturing a double-sided coated fabric that is prepared including parts and 5 parts by weight of a crosslinked polyacrylate polymer. A double-sided coated fabric produced by the manufacturing method of any one of claims 1, 3 and 4. A bag manufactured using the double-sided coated fabric of claim 5.