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PLA/TPU double-component wire for 3D printing and preparation method thereof

A 3D printing, two-component technology, applied in the direction of additive processing, coating, etc., can solve the problems of limited application, low printing efficiency, easy adhesion of TPU wire when winding, and achieve the effect of high product quality and excellent performance

Inactive Publication Date: 2020-11-06
QUANGANG PETROCHEM RES INST OF FUJIAN NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high glass transition temperature of PLA, it is hard and brittle at room temperature, and it is difficult to apply to the printing of joint joints, which seriously limits its application in the field of 3D printing.
[0004] Thermoplastic polyurethane elastomer (TPU) has good flexibility. 3D consumables developers continue to try to extrude consumables with TPU materials, but TPU wires are easy to stick when reeled, difficult to feed materials during 3D printing, and low printing efficiency, etc., have become restrictions on its application. The main reason in the field of 3D printing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The 3D wire extrusion production line prepares 3D wire with "skin-core" structure. The skin layer is PLA material, and the core layer is a blend of an appropriate amount of hydroxyapatite and polyester TPU. PLA / TPU / hydroxyapatite is 5% : 94%: 1% ratio is placed in A extrusion screw and B extrusion screw respectively, A extrusion screw processing temperature Ⅰ~Ⅵ zone (℃): 195, 193, 196, 194, 190, 200, B extrusion Exit screw processing temperature Ⅰ~Ⅵ area (℃): 193, 201, 205, 207, 208, 204, co-extrude PLA / TPU bi-component wire through a special die. The extruded PLA / TPU wire is first cooled by 7°C cooling water, and then dried by an air-cooled conveyor belt. The winding frequency is controlled at 10HZ to obtain an extruded wire suitable for the size requirements of 3D printing.

Embodiment 2

[0024] The 3D wire extrusion production line prepares 3D wire with "skin-core" structure. The skin layer is PLA material, and the core layer is a blend of an appropriate amount of hydroxyapatite and polyester TPU. PLA / TPU / hydroxyapatite is 10% : 88%: 2% The ratio is placed in the A extrusion screw and the B extrusion screw respectively, and the processing temperature of the A extrusion screw is Ⅰ~Ⅵ area (℃): 195, 193, 196, 194, 190, 200, B extrusion Exit screw processing temperature Ⅰ~Ⅵ area (℃): 193, 201, 205, 207, 208, 204, co-extrude PLA / TPU bi-component wire through a special die. The extruded PLA / TPU wire is first cooled by 10°C cooling water, and then dried by an air-cooled conveyor belt. The winding frequency is controlled at 15HZ to obtain an extruded wire suitable for the size requirements of 3D printing.

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Abstract

The invention provides a PLA / TPU double-component wire for 3D printing and a preparation method thereof. A self-developed 3D wire extrusion production line is adopted to prepare a skin-core structure3D wire, a skin layer is made of a PLA material, a core layer is made of a blend of a proper amount of hydroxyapatite and polyester type TPU, PLA / TPU double components are respectively placed in an extrusion screw A and an extrusion screw B according to a certain ratio, wherein the processing temperature I-VI zone (DEG C) of the extrusion screw A is 195-200 DEG C, 185-190 DEG C, 190-195 DEG C, 190-195 DEG C, 190-195 DEG C and 185-190 DEG C, and the processing temperature I-VI zone (DEG C) of the extrusion screw B is 190-195 DEG C, 200-205 DEG C, 200-205 DEG C, 205-210 DEG C, 205-210 DEG C and200-205 DEG C; and the bonding force between PLA and TPU is improved through the proper amount of hydroxyapatite and the polyester type TPU, and the PLA / TPU double-component wire is prepared through co-extrusion of a special die head. The PLA / TPU double-component wire has the beneficial effects that the defects of high brittleness and poor impact resistance of the PLA wire are overcome, moreover,the defects of easiness in adhesion during winding and difficulty in printing of the TPU material are overcome, and the PLA / TPU double-component wire is suitable for 3D printing, rich in elasticity, easy to print and capable of being used for printing of joint joints.

Description

technical field [0001] The invention relates to the technical field of 3D printing manufacturing, in particular to a PLA / TPU two-component wire for 3D printing and a preparation method thereof. Background technique [0002] 3D printing technology, that is, additive manufacturing technology, is an emerging rapid prototyping technology. It is a technology based on digital model files, using bondable materials such as powdered metal or plastic, to construct objects by layer-by-layer printing, without the need for mold manufacturing, saving time and cost of mold manufacturing. The basic principle is additive manufacturing, the technique of adding material layer by layer to generate a three-dimensional solid. As the core technology to promote the revolution of the tertiary industry, 3D printing has the characteristics of networking, digitization, and personalization, and it is gradually used in medicine, bioengineering, construction, clothing, aviation and other fields. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C48/05B29C48/154B29C48/28B29C48/88B29C48/92B33Y80/00C08L75/04C08L67/04C08K3/32
CPCB33Y80/00B29C48/05B29C48/154B29C48/28B29C48/88B29C48/92B29C2948/92704B29C2948/92885C08K2003/325C08L75/04C08L2207/04C08L67/04C08K3/32
Inventor 刘志鹏陈作珍
Owner QUANGANG PETROCHEM RES INST OF FUJIAN NORMAL UNIV