KR-20260064069-A - Method of manufacturing coating fabric with coating layer comprising cellulose nanofiber and aerogel

Abstract

In the present invention, a high-density triple-woven fabric is calendered, and then a coating resin liquid containing cellulose nanofibers and ultrafine porous silica is coated and processed onto it to produce a coated fabric. Since the coating layer constituting the coated fabric manufactured according to the present invention contains ultrafine porous silica with excellent thermal insulation and heat retention properties, and cellulose nanofibers with a large specific surface area while possessing lightweight properties and high strength, the coated fabric exhibits excellent thermal insulation, heat retention, lightweight properties, and high strength, making it useful as a material for various interior applications.

Inventors

• 양성용
• 황세정

Assignees

• 수텍스주식회사

Dates

Publication Date

20260507

Application Date

20241031

Claims (4)

1. (i) A weaving process for manufacturing a high-density triple-woven fabric with a weight per unit area of 150–300 g/㎡ using low-melting yarn as the warp and bio-based processed yarn as the weft; (ii) a calendering process for imparting smoothness to the high-density triple-woven fabric woven as described above; and (iii) a coating processing process comprising coating a coating resin solution containing cellulose nanofibers and ultrafine porous silica on one side of a high-density triple-woven fabric that has undergone a calendering process, followed by drying and heat treatment; a method for manufacturing a coated fabric having a coating layer containing cellulose nanofibers and ultrafine porous silica formed thereon.
2. A method for manufacturing a coated fabric having a coating layer containing cellulose nanofibers and ultrafine porous silica, characterized in that, in claim 1, the calendering process is carried out at a temperature of 60°C and a pressure of 50 kg/㎠.
3. A method for manufacturing a coated fabric having a coating layer containing cellulose nanofibers and ultrafine porous silica, characterized in that, in claim 1, 3 parts by weight of cellulose nanofibers are contained per 100 parts by weight of ultrafine porous silica.
4. A method for manufacturing a coated fabric having a coating layer containing cellulose nanofibers and ultrafine porous silica, characterized in that, in claim 1, the coating resin liquid is coated on one side of a calendered high-density triple-woven fabric, dried at 120°C, and then heat-treated by passing it through a tenter at 180°C at a speed of 30 m/min.

Description

Method of manufacturing coating fabric with coating layer comprising cellulose nanofiber and aerogel The present invention relates to a method for manufacturing a coated fabric having a coating layer containing cellulose nanofibers and ultrafine porous silica. More specifically, the invention relates to a method for manufacturing a coated fabric having excellent thermal insulation, heat retention, lightness, and strength by containing cellulose nanofibers and ultrafine porous silica within the coating layer constituting the coated fabric. In particular, the present invention was developed as part of the “2022 Cross-Industry Convergence Business Foundation Project” supported by Daegu Metropolitan City. According to Korean Patent Publication No. 10-2018-011542 and others, a method of manufacturing a coated fabric by coating one side of a fabric with a coating resin liquid containing ultrafine porous silica has been widely used. However, the coated fabric produced by the above conventional method had problems with insufficient lightness and strength, although it had excellent thermal insulation and heat retention properties. Consequently, it was difficult to apply the coated fabric produced by the conventional method as a material for various interior applications. The present invention will be described in detail below. The method for manufacturing a coated fabric according to the present invention is characterized by comprising: (i) a weaving process for manufacturing a high-density triple-woven fabric with a weight per unit area of 150 to 300 g/m² using low melting yarn as the warp and bio-based processed yarn as the weft; (ii) a calendering process for imparting smoothness to the high-density triple-woven fabric woven as above; and (iii) a coating processing process for coating a coating resin liquid containing cellulose nanofibers and ultrafine porous silica onto one side of the high-density triple-woven fabric that has undergone the calendering process, followed by drying and heat treatment. More specifically, in the present invention, a high-density triple-woven fabric with a weight of 150 to 300 g/m² per unit area is woven by first using low melting yarn as the warp and bio-based processed yarn as the weft. As an example of an embodiment of the present invention, the warp density is set to 160 threads/inch, the weft density is set to 45 threads/inch, the warp fineness is set to 50 denier, and the weft fineness is set to 150 denier. The above bio-based processed yarn is a biodegradable yarn, etc. Next, a calendering process is performed to impart smoothness to the high-density triple-woven fabric woven as described above. The calendering process is carried out at a temperature of 60°C and a pressure of 50 kg/㎠, the speed ratio of the middle roller and the top roller is set to 1:1, and the rotational speed of the calender roller is controlled to 30 m/min. Next, a coating process is performed in which a coating resin solution containing cellulose nanofibers and ultrafine porous silica is coated onto one side of a high-density triple-woven fabric that has undergone a calendering process, followed by drying and heat treatment. At this time, it is preferable to include 3 parts by weight of cellulose nanofibers per 100 parts by weight of ultrafine porous silica in the coating resin solution. Polyurethane resin, etc. is used as the above coating solution resin. In addition, it is preferable to coat the above coating resin liquid onto one side of a calendered high-density triple-woven fabric, dry it at 120°C, and then heat treat it by passing it through a tenter at 180°C at a speed of 30 m/min. The present invention will be examined in more detail below through examples and comparative examples. Example 1 First, a high-density triple-woven fabric with a weight of 200 g/m² per unit area was woven using low melting yarn as the warp and bio-based processed yarn as the weft. At this time, the warp density was adjusted to 160 threads/inch, the weft density to 45 threads/inch, the warp fineness to 50 denier, and the weft fineness to 150 denier. Next, a calendering process was performed to impart smoothness to the high-density triple-woven fabric woven as described above. At this time, the calender temperature was adjusted to 60℃ and the pressure to 50kg/㎠, the speed ratio of the middle roller and the top roller was adjusted to 1:1, and the rotational speed of the calender roller was adjusted to 30m/min. Next, a coating process was performed to produce a final coated fabric by coating a coating resin solution containing cellulose nanofibers and ultrafine porous silica onto one side of a high-density triple-woven fabric that had undergone a calendering process, followed by drying and heat treatment. At this time, the coated fabric was dried at 120°C and then passed through a tenter at 180°C at a speed of 30 m/min. The results of evaluating various properties of the manufactured coated fabric were as shown in Table 1. C