KR-20260065045-A - method of manufacturing parts of office furniture using recycled polyamid 6

Abstract

A method for manufacturing office furniture parts using recycled polyamide 6 according to the present invention may include the steps of: mixing/melting recycled polyamide 6, glass fiber, carbon black, and black dye to produce a compound; melting the compound and injecting it into a mold; cooling the mold by flowing cooling water; and discharging the injection-molded product from the mold.

Inventors

• 황성훈

Assignees

• (주)티에스더블유

Dates

Publication Date

20260508

Application Date

20241031

Claims (8)

1. A step of preparing a compound by mixing/melting recycled polyamide 6, glass fiber, carbon black, and black dye; A step of melting the above compound and injecting it into a mold; A step of cooling the mold by flowing cooling water; and A step comprising discharging an injection-molded product from the above mold, The above compound is, A method for manufacturing office furniture parts using recycled polyamide 6, characterized by comprising 20% to 30% by weight of glass fiber, 1% to 2% by weight of carbon black and black dye combined, and the remainder being recycled polyamide 6.
2. In paragraph 1, In the above compound, The ratio of black carbon is, A method for manufacturing office furniture parts using recycled polyamide 6, characterized by a ratio of black dye or higher.
3. In paragraph 2, In the above compound, A method for manufacturing office furniture parts using recycled polyamide 6, characterized in that the ratio of black dye to carbon black is 1:1 to 2:1.
4. In paragraph 2, The above compound is, It is melted at 200℃ to 250℃ and injected, The cooling temperature of the above mold is, A method for manufacturing office furniture parts using recycled polyamide 6, characterized by being at a temperature of 50℃ to 70℃.
5. In paragraph 1, The melt index of the above office furniture component according to ASTM D1238 (250℃, 2160g) standard is, It is 6g/10min to 7g/10min, and The specific gravity of the above office furniture component according to ASTM D 792 standard is, A method for manufacturing office furniture parts using recycled polyamide 6, characterized by having a value of 1.30 to 1.38.
6. The tensile strength of the above office furniture component according to ASTM D 638 standard is, A method for manufacturing office furniture parts using recycled polyamide 6, characterized by having a weight of 1,300 kgf/ cm² to 1,650 kgf/ cm² .
7. In paragraph 5, The flexural strength of the above office furniture component according to ASTM D 790 standard is, 1,850 kgf/ cm² It is up to 2,650 kgf/ cm² , and The flexural modulus of the above office furniture component according to ASTM D 790 standard is, A method for manufacturing office furniture parts using recycled polyamide 6, characterized by having a resistance of 59,750 kgf/ cm² to 80,000 kgf/ cm² .
8. In paragraph 5, The impact strength of the above office furniture component according to ASTM D 256 standard is, A method for manufacturing office furniture parts using recycled polyamide 6, characterized by having a weight of 8 kgf·m/m to 14 kgf·m/m.

Description

Method of manufacturing parts of office furniture using recycled polyamid 6 The present invention relates to a technology for manufacturing parts for office furniture by mixing recycled polyamide 6 (polyamid 6 or PA 6) with various additive raw materials to produce a compound, and then melting and injecting the compound. Polyamide is a polymer compound produced through polymerization reactions. It is a polymer containing amide bonds (-CONH-) and is used in various industrial fields due to its excellent properties such as strength, elasticity, heat resistance, wear resistance, durability, and chemical resistance. Among them, polyamide 6 is a type of engineering polyamide that has physical and chemical properties suitable for applications requiring high strength, elasticity, and durability, such as automotive parts, electrical and electronic products, industrial machinery parts, household goods, and sporting goods. However, with the recent increase in interest in eco-friendliness, global warming, resource recycling, and ESG (Environmental Social Governance), interest in recycling polyamide 6 is also rising. However, in the case of products made using recycled polyamide 6, it is difficult to achieve the desired quality in terms of product surface condition, mechanical properties (e.g., strength, elastic modulus, etc.), and color realization. FIG. 1 is a flowchart illustrating a method for manufacturing office furniture parts using recycled polyamide 6 according to the present invention. FIG. 2 is a series of photographs illustrating the process of performing the method for manufacturing office furniture parts according to the present invention. Figure 3 shows photographs of recycled polyamide 6, which is the main material for manufacturing office furniture parts according to the present invention. Figure 4 shows photographs illustrating the process of manufacturing a compound according to the method for manufacturing office furniture parts according to the present invention. Figure 5 shows photographs of office furniture parts manufactured according to the present invention. Figure 6 is a photograph comparing the surface condition of an office furniture component according to an embodiment and a comparative example of the present invention. In order to fully understand the present invention, the operational or functional advantages of the present invention, and the objectives achieved by the implementation of the present invention, reference must be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings. Hereinafter, the present invention will be described in more detail with reference to the attached drawings. Since the present invention is susceptible to various modifications and may take various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed forms, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. In describing each drawing, similar reference numerals have been used for similar components. In the attached drawings, the dimensions of the structures may be depicted enlarged or reduced compared to the actual dimensions to ensure clarity of the invention. Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. A singular expression includes a plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application. FIG. 1 is a flowchart illustrating a method for manufacturing office furniture parts using recycled polyamide 6 according to the present invention