公开(公告)号：US20220372282A1

公开(公告)日：2022-11-24

申请号：US17772153

申请日：2020-09-25

Applicant: KOLON PLASTICS, INC.

Inventor： Doo Sik MIN ,  Jong Hoe OH

IPC: C08L71/02 ,  B22F1/103 ,  B22F1/05

Abstract: The present invention relates to a binder composition for metal powder injection molding, and more specifically, to a binder composition for metal powder injection molding, which can be promptly debound, facilitates the setting of flow conditions in an injection process, and enables the minimization of poor debinding such as swelling, carbonization of low-molecular-weight binders, and other internal defects, during a debinding process.
The binder composition for metal powder injection molding of the present invention contains 10 to 50 wt % of a high-viscosity polyoxymethylene polymer and 50 to 90 wt % of a low-viscosity polyoxymethylene polymer.
By containing polyoxymethylenes alone, which has been produced with different viscosities, without feeding of other monomers in the polymerization process of polyoxymethylene, the binder composition for metal powder injection molding according to the present invention is more economical through low manufacturing costs compared with a conventional technique in which the rate of decomposition by a gas-phase acid is controlled by viscosity adjustment in a polymerization process, and has excellent injection characteristics and debinding/sintering characteristics compared with a technique in which polyoxymethylene and other polymer resins, such as polyolefins and polyamides, are used together.

公开(公告)号：US20230415226A1

公开(公告)日：2023-12-28

申请号：US18250552

申请日：2021-10-26

Applicant: KOLON PLASTICS, INC.

Inventor： Jong Hoe OH ,  Doo Sik MIN

IPC: B22F1/103 ,  C09D123/00 ,  C09D159/02 ,  C09D7/65 ,  C09D7/63 ,  C09D7/61 ,  B33Y70/10 ,  B22F3/20 ,  B22F3/10 ,  B22F3/24 ,  B22F10/64 ,  B22F10/62 ,  B33Y40/20 ,  B22F5/12

CPC classification number: B22F1/103 ,  B22F2201/11 ,  C09D159/02 ,  C09D7/65 ,  C09D7/63 ,  C09D7/61 ,  B33Y70/10 ,  B22F3/20 ,  B22F3/1025 ,  B22F3/24 ,  B22F10/64 ,  B22F10/62 ,  B33Y40/20 ,  B22F5/12 ,  B22F2998/10 ,  B22F2003/248 ,  B22F2999/00 ,  B22F2201/20 ,  C09D123/00

Abstract: The present invention provides a 3D printer composition, a 3D printer filament using same, and a method for manufacturing a metal steel product by using the filament, the composition including: 10 wt % to 30 wt % of a polymer binder including 3.5 wt % to 10 wt % of polyacetal, 3.5 wt % to 10 wt % of a polyolefin elastomer, 2 wt % to 6 wt % of a plasticizer, and 1 wt % to 4 wt % of a lubricant; and 70 wt % to 90 wt % of a metal powder.