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Polymer composition for 3D printing, material, method and molded article thereof

A 3D printing and polymer technology, applied in the direction of solid material additive processing, 3D object support structure, additive processing, etc.

Pending Publication Date: 2021-03-19
TSRC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these materials still have various shortcomings

Method used

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  • Polymer composition for 3D printing, material, method and molded article thereof
  • Polymer composition for 3D printing, material, method and molded article thereof
  • Polymer composition for 3D printing, material, method and molded article thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0070] Take polymer SEBS 6014 (styrene content 18 wt%) 20 wt% and processing aid Oil150N 80 wt% as the polymer composition. The polymer composition is kneaded and granulated by twin-screw extruder at 160-230° C. to obtain kneaded particles. The kneaded particles were shot into flat test pieces and their hardness was measured. After the kneaded particles were left to stabilize for 1 day, the MFI value was measured. Then the FDM particle feed printing feasibility analysis (140°C) was performed.

[0071] The polymer compositions of Examples 1 to 8 and Comparative Example 1 are all SEBS and Oil 150N. The polymer compositions of these examples can be referred to Table 1. The practice of these examples can refer to Example 1.

[0072] Table 1

[0073]

[0074] The meanings of the symbols in the tables of the present invention are explained below. X: It means that it cannot be printed, that is, the material cannot be extruded from the printing nozzle smoothly, so the materia...

example 9

[0076] The macromolecule composition of Examples 9 to 11 is composed of one of the macromolecules selected from SEEPS, SBS, and SIS, and the processing aid Oil 150N is added. The practice of these examples can refer to Example 1. The polymer compositions of these examples can be referred to Table 2.

[0077] Table 2

[0078]

[0079] Referring to Table 2, Examples 9 to 11 show the successfully printed polymer composition, the styrene content of SEEPS / SBS / SIS is less than 25% by weight. Table 2 also shows that in the polymer compositions of Examples 9 to 11, the weight ratio of SEEPS / SBS / SIS to Oil 150N is in the range of 1:1 to 1:4. In the present invention, there are other comparative examples (not shown in the table) in which the weight of the processing aid is greater than four times the weight of the vinyl aromatic block copolymer (SEEPS / SBS / SIS). The amount of oil that SEEPS / SBS / SIS can absorb is limited, so it cannot be processed and mixed. In Examples 9 to 11 tha...

example 12

[0081] Take 50% by weight of polymer SEBS 6014 (18 wt% styrene content) and 50 wt% SEBS 6245 (12 wt% styrene content) as the polymer composition. The polymer composition is kneaded and granulated by twin-screw extruder at 160-230° C. to obtain kneaded particles. The kneaded particles were shot into flat test pieces and their hardness was measured. After the kneaded particles were left to stabilize for 1 day, the MFI value was measured. Then the FDM particle feed printing feasibility analysis (240°C) was performed.

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Abstract

The invention relates to a polymer composition for 3D printing, a material, a method and a molded article thereof. A polymer composition for 3D printing is provided, wherein the polymer composition comprises a polymer including a vinyl aromatic based block copolymer composed of vinyl aromatic monomer and conjugated diene monomer, a vinyl aromatic monomer content of the vinyl aromatic based block copolymer is less than 25% by weight, and the polymer does not contain polyolefin, polylactide, polycarbonate, polyamide, polymethylmethacrylate, poly(methyl acrylate), polyvinylchloride, poly(vinylidene chloride), polyester, vinyl acetate copolymer and styrene-based resin.

Description

technical field [0001] The invention relates to a polymer composition, especially a polymer composition containing a vinyl aromatic block copolymer, which is used for 3D printing. Background technique [0002] 3D printing, also known as additive manufacturing, is a rapid prototyping technology. Under the control of the computer, the printer constructs a model of the characteristic details of the picture file in a high-precision layer-by-layer stacking manner based on the 3D drawing file. According to the types of raw materials and molding methods, 3D printing can be divided into more than ten different technologies such as fused deposition modeling (FDM), stereolithography (SLA), and selective laser sintering (SLS). In the FDM method, the filamentous soft material is placed on the extrusion head, and the extrusion head is heated to melt the material. Under the control of the computer, the extrusion head selectively extrudes the molten material on the working platform, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L91/00C08L53/02B33Y70/00
CPCC08L91/00C08L53/025C08L53/02B33Y70/00C08L2205/03C08L2205/025B33Y10/00B33Y80/00B29C64/118B29C64/153C08L25/10B29K2025/08
Inventor 施希弦叶芸瑄
Owner TSRC CORP
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