KR-20260062334-A - Footwear fabric and manufacturing method using PET regenerator and 3D vacuum printing

Abstract

The present invention relates to an eco-friendly shoe fabric using recycled PET yarn and 3D vacuum printing, and a manufacturing method, by using recycled materials and minimizing wastewater generation, to knit a shoe fabric using recycled PET yarn made by processing waste PET, and to impart a beautiful color pattern by 3D vacuum printing on one side of the knitted shoe fabric to manufacture the shoe fabric. The technical gist of the present invention is a shoe fabric using recycled PET yarn and 3D vacuum printing, characterized by comprising: a fabric knitted with recycled PET yarn produced by processing waste PET and having a three-dimensional surface that has a three-dimensional shape and a three-dimensional texture; and a dyeing layer in which a dye is applied to the surface of the fabric in a 3D vacuum printing manner corresponding to a preset color pattern.

Inventors

• 오진현

Assignees

• ㈜핀프로젝트코리아

Dates

Publication Date

20260507

Application Date

20241029

Claims (1)

1. A fabric knitted with recycled PET yarn produced by processing waste PET, having a three-dimensional surface and a three-dimensional texture; and A shoe fabric using recycled PET yarn and 3D vacuum printing, characterized by comprising: a dyeing layer in which a dye is dyed using a 3D vacuum printing method corresponding to a preset color pattern on the surface of the above fabric.

Description

Footwear fabric and manufacturing method using PET regenerator and 3D vacuum printing The present invention relates to an eco-friendly shoe fabric using recycled PET yarn and 3D vacuum printing, and a manufacturing method, by using recycled PET yarn made by processing waste PET to knit the shoe fabric and 3D vacuum printing on one side of the knitted shoe fabric to impart a beautiful color pattern, thereby applying recycled materials and minimizing the amount of wastewater generated. Generally, the material used for the upper of the shoe is primarily leather material, including natural leather or synthetic leather, which is relatively thick and has shape stability to preserve the shape of the shoe and protect the foot inside the shoe. Recently, in order to improve the comfort of the shoe, ensure lightness, and enhance the aesthetic appearance, knitted synthetic fibers are being used more often as the material for the shoe upper rather than leather. In addition, to enhance the fashionability of the shoes, a dyeing process is being added to give various colors to the shoe fabric used as the upper. That is, a process is being performed in which the shoe fabric itself is immersed in the dye solution to dye it, or the material fibers that make up the shoe fabric are immersed in the dye solution to dye it. However, as described above, when shoe fabrics or material fibers are dyed by immersing them in a dye solution, a large amount of wastewater is generated. Since this wastewater contains chemicals including dyes, it not only increases environmental pollution but also presents problems such as reduced work efficiency due to the difficulty in treating the dye solution and the complexity of the dyeing process. In addition, as shoe fabrics have a three-dimensional surface shape depending on various knitting forms such as mesh structures, there is a problem in that the dye contained in the dye solution is not uniformly absorbed across the entire surface, resulting in improper dyeing. Therefore, there is also a limitation in that the shoe fabric cannot be dyed itself; instead, yarn dyeing is performed by individually dyeing the material fibers that serve as the base material with a dye solution, and after designing a color pattern, the material fibers are knitted according to the color of the material fibers to produce the shoe fabric. Therefore, research is needed on manufacturing technology for eco-friendly shoe fabrics that can dye the surface of the fabric to correspond to various color patterns and reduce environmental pollution by minimizing wastewater generated during the dyeing process. FIG. 1 is a cross-sectional view illustrating a shoe fabric using PET recycled yarn and 3D vacuum printing according to the present invention. FIG. 2 is a process flowchart illustrating a method for manufacturing shoe fabric using PET recycled yarn and 3D vacuum printing according to the present invention. FIG. 3 is a detailed process flowchart illustrating the fabric dyeing step of a method for manufacturing shoe fabric using PET recycled yarn and 3D vacuum printing according to the present invention. The present invention relates to a shoe fabric using recycled PET yarn that can be used as the upper of a shoe and a method for manufacturing using three-dimensional vacuum printing. In particular, the shoe fabric and manufacturing method using PET recycled yarn and 3D vacuum printing according to the present invention are characterized by being able to reduce environmental pollution, contribute to environmental protection, and improve the aesthetic appearance of the shoe. These features can be achieved by knitting a shoe fabric using recycled PET yarn, which is recycled by processing waste PET, as a material fiber, and dyeing the surface of the knitted shoe fabric using a 3D vacuum printing method. A shoe fabric and manufacturing method using PET recycled yarn and 3D vacuum printing according to a preferred embodiment of the present invention will be described in detail below with reference to the attached drawings. A shoe fabric using PET recycled yarn and 3D vacuum printing according to a preferred embodiment of the present invention may be composed of a fabric (10) knitted with PET recycled yarn that has been recycled by processing waste PET as shown in FIG. 1, and a dyeing layer (20) on the surface of the fabric (10) in which a multi-colored dye is dyed to correspond to a preset color pattern. At this time, the fabric (10) may have a three-dimensional shape on its surface rather than a flat surface, depending on the knitting pattern of the recycled PET yarn. That is, the fabric (10) can have a three-dimensional surface shape according to various knitting forms for mesh structure, interlock structure, spacer structure, etc. And the dyeing layer (20) can be formed by dyeing the surface of the fabric (10) with multicolored dyes using a three-dimensional vacuum printing method to improve dyeing quality. Here, the 3D vacuum print