KR-20260066916-A - Method of manufacturing coating fabric with coating layer of polyhydroxyalkanoate resin

Abstract

The present invention manufactures a coated fabric by coating a polyhydroxyalkanoate resin coating solution, which is produced by undergoing two conditioning treatments and a blending process on a fabric containing biomass yarn, using a coating knife equipped with a heat supply device capable of controlling the temperature from 40°C to 90°C to block cold air from the outside, followed by drying and heat treatment. The coated fabric produced by the present invention is environmentally friendly due to its excellent biodegradability, as it contains biomass material yarns in the woven fabric and has a polyhydroxyalkanoate resin coating layer formed thereon.

Inventors

• 양성용
• 황세정

Assignees

• 수텍스주식회사

Dates

Publication Date

20260512

Application Date

20241105

Claims (2)

1. (i) A process of weaving a fabric comprising a yarn of one type of biomass material selected from recycled polyamide yarn (biomass PA 510 material) and recycled polyester yarn; (ii) A primary conditioning process of sealing the polyhydroxyalkanoate resin and aging it at 80°C for 48 hours; (iii) A process for preparing a coating resin solution by mixing toluene (solvent) with a primary conditioned polyhydroxyalkanoate resin; (iv) a secondary conditioning process of sealing the polyhydroxyalkanoate resin and aging it at 60°C for 5 hours; and (v) a coating process comprising: coating the woven fabric on one side by blocking cold air from the outside using a coating knife equipped with a heat supply device capable of controlling the temperature from 40°C to 90°C, and then drying and heat treating by passing through a drying chamber at 80°C and a tenter at 170°C at a speed of 30 m/min; a method for manufacturing a coated fabric having a polyhydroxyalkanoate resin coating layer formed thereon.
2. A method for manufacturing a coated fabric having a polyhydroxyalkanoate resin coating layer formed thereon, wherein, in claim 1, the woven fabric is characterized in that both the warp and weft yarns are recycled polyamide yarns (biomass PA 510 material).

Description

Method of manufacturing coating fabric with coating layer of polyhydroxyalkanoate resin The present invention relates to a method for manufacturing a coated fabric having a polyhydroxyalkanoate resin coating layer formed thereon, and more specifically, to a method for manufacturing an eco-friendly coated fabric having excellent biodegradability by coating a polyhydroxyalkanoate resin coating solution onto a woven fabric containing a biomass material yarn (e.g., biomass PA 510: material developed in the present invention). Conventional coated fabrics have been manufactured by coating a coating resin liquid, composed of synthetic resins such as polyurethane resin, onto a woven fabric. The coated fabric manufactured by the above-mentioned conventional method had a problem of not being eco-friendly because its constituent coating layer was made of synthetic resin, which resulted in almost no biodegradability. Another conventional method attempted involves coating a synthetic fiber fabric with a polyhydroxyalkanoate resin coating solution to produce a coated fabric with improved biodegradability; however, there was a problem in that coating the woven fabric was difficult because the polyhydroxyalkanoate resin hardens rapidly. Figure 1 is a schematic diagram of a conventional knife floating type coating. FIG. 2 is a schematic diagram of a coating according to the present invention. The present invention will be described in detail below. The method for manufacturing a coated fabric according to the present invention is manufactured by sequentially passing the following steps: (i) a process of weaving a fabric containing a yarn of biomass material; (ii) a first conditioning process of a polyhydroxyalkanoate resin; (iii) a process of preparing a coating resin liquid by mixing toluene with the conditioned polyhydroxyalkanoate resin; (iv) a second conditioning process of the polyhydroxyalkanoate resin; and a process of coating, drying, and heat-treating the coating resin liquid that has undergone the second conditioning process onto the woven fabric. Specifically, in the present invention, a fabric is first woven comprising a yarn of one type of biomass material selected from recycled polyamide yarn (biomass PA 510 material) and recycled polyester yarn. The woven fabric may have both warp and weft yarns made of recycled polyamide yarn (biomass PA 510 material). Next, a primary conditioning step is performed by sealing the polyhydroxyalkanoate resin and aging it at 80°C for 48 hours. Next, a coating resin solution is prepared by mixing toluene (solvent) with the primary conditioned polyhydroxyalkanoate resin. Next, a secondary conditioning process is performed by sealing the polyhydroxyalkanoate resin and aging it at 60°C for 5 hours. Finally, the coating resin liquid is coated on one side of the woven fabric using a coating knife equipped with a heat supply device capable of controlling the temperature from 40°C to 90°C, in a manner that blocks cold air from the outside, and then dried and heat-treated by passing through a drying chamber at 80°C and a tenter at 170°C at a speed of 30 m/min to manufacture the coated fabric according to the present invention. The present invention will be examined in more detail below through examples and comparative examples. Example 1 A plain weave fabric was woven using recycled polyamide yarn (biomass PA 510 material) as the warp and weft. Next, a primary conditioning process was carried out by sealing the polyhydroxyalkanoate resin and aging it at 80°C for 48 hours. Next, a coating resin solution was prepared by mixing toluene (solvent) with a primary conditioned polyhydroxyalkanoate resin. Next, a secondary conditioning process was performed by sealing the polyhydroxyalkanoate resin and aging it at 60°C for 5 hours. Finally, the coating resin liquid was coated on one side of the woven fabric using a coating knife equipped with a heat supply device capable of controlling the temperature from 40°C to 90°C, in a manner that blocks cold air from the outside, and then the coated fabric was manufactured by drying and heat treating it while passing it through a drying chamber at 80°C and a tenter at 170°C at a speed of 30 m/min. The manufactured coated fabric was eco-friendly due to its excellent biodegradability. Comparative Example 1 We attempted to manufacture a coated fabric using the same coating resin liquid as in Example 1 by a knife floating method, except that the conditioning process of sealing and aging the polyhydroxyalkanoate resin was omitted. However, the curing speed of the polyhydroxyalkanoate resin was too fast, making it difficult to efficiently coat the coating resin liquid onto the woven fabric, so we were unable to produce the coated fabric. Comparative Example 2 A coated fabric was manufactured by coating a polyurethane resin coating solution onto the woven fabric of Example 1. The manufactured coated fabric was not eco-friendly because it had almost no biodegrada