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Modified high density polyethylene 3D printing moulding material and preparation method

A high-density polyethylene, 3D printing technology, applied in the field of 3D printing molding materials, can solve the problems of complex nanofiber composite line FDM, low HDPE toughness, low impact strength, etc., and achieve easy industrial production, high tensile strength, good The effect of impact toughness

Active Publication Date: 2014-08-13
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the FDM of the nanofiber composite wire is very complicated and difficult to handle
[0008] The purpose of the present invention is to propose a method for improving the toughness of HDPE materials in view of the current characteristics of low toughness and low impact strength of HDPE

Method used

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  • Modified high density polyethylene 3D printing moulding material and preparation method
  • Modified high density polyethylene 3D printing moulding material and preparation method
  • Modified high density polyethylene 3D printing moulding material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 60 parts by weight of HDPE, 20 parts of CaCO 3 , 20 parts of wollastonite, 0, 10, 20, 30, 40 or 50 parts of talc, 10 parts of carbon nanotubes, 0.1 parts of antioxidant CA, 0.1 parts of silane coupling agent, mixed by a high-speed mixer 5min, and then extruded and granulated in a twin-screw extruder, and the granules were cooled and dried, and then injection-molded to obtain a sample. Wherein the carbon nanotubes are activated by nitric acid, and the specific process of nitric acid activation is to reflux the carbon nanotubes in 65% concentrated nitric acid for 2 hours, ultrasonically disperse them at the same time, and then wash them with distilled water until neutral.

[0031] Process conditions: ①Extrusion process: extrusion temperature 175°C, screw speed 240r / min. ②Injection process: injection molding temperature 180°C, injection pressure 80MPa; injection speed 40g / s; injection time 6s; dwell time 10s; mold temperature 50°C.

[0032] The main properties of the mod...

Embodiment 2

[0036] 60 parts by weight of HDPE, 20 parts of CaCO 3 , 10 parts of talc, 10 parts of carbon nanotubes, 0.5 parts of antioxidant CA, 0.5 parts of silane coupling agent, and 0, 10, 20, 30, 40 or 50 parts of wollastonite are mixed by a high-speed mixer 5min, and then extruded and granulated in a twin-screw extruder, and the granules were cooled and dried, and then injection-molded to obtain a sample. Wherein the carbon nanotubes are activated by nitric acid, and the specific process of nitric acid activation is to reflux the carbon nanotubes in 65% concentrated nitric acid for 2 hours, ultrasonically disperse them at the same time, and then wash them with distilled water until neutral.

[0037] Process conditions: ①Extrusion process: extrusion temperature 175°C, screw speed 240r / min. ②Injection process: injection molding temperature 180°C, injection pressure 80MPa; injection speed 40g / s; injection time 6s; dwell time 10s; mold temperature 50°C.

[0038] The main properties of ...

Embodiment 3

[0042] 60 parts by weight of HDPE, 20 parts of CaCO 3 , 20 parts of talc, 0.1 part of antioxidant CA, 0.1 part of silane coupling agent, 30 parts of wollastonite, 0, 10 (activated by nitric acid), 10 (not activated by nitric acid), 12 (activated by nitric acid ), 13 (activated by nitric acid) and 15 (activated by nitric acid) carbon nanotubes were mixed by a high-speed mixer for 5 minutes, then extruded and granulated by a twin-screw extruder, and the pellets were cooled and dried by injection molding to obtain a sample strip. Wherein the activation of carbon nanotubes is the same as in Examples 1 and 2.

[0043] Process conditions: ①Extrusion process: extrusion temperature 175°C, screw speed 240r / min. ②Injection process: injection molding temperature 180°C, injection pressure 80MPa; injection speed 40g / s; injection time 6s; dwell time 10s; mold temperature 50°C.

[0044] The main properties of the modified HDPE were tested, and the test results are as follows:

[0045] ...

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Abstract

The invention discloses a modified high density polyethylene 3D printing moulding material with toughness. The modified high density polyethylene 3D printing moulding material comprises the following components, by weight, 60 parts of high density polyethylene, 10-50 parts of powdered steatile, 20-25 parts of calcium carbonate, 10-50 parts of wollastonite, 10-15 parts of carbon nanotube, 0.1-0.5 part of an antioxidant and 0.1-0.5 part of a silane coupling agent. The modified high density polyethylene material has high tensile strength and good impact toughness. Application value of high density polyethylane can be raised and its application field can be widened. The high density polyethylene material is more in line with characteristics of a 3D printing material. The material provided by the invention is environmentally friendly, has low cost and has important industrial application value.

Description

technical field [0001] The invention relates to the field of 3D printing molding materials, in particular to a toughened modified high-density polyethylene 3D printing molding material and a preparation method thereof. Background technique [0002] 3D printing technology (Three Dimensions Printing, 3D printing technology, 3DP) is a form of additive manufacturing (AM) technology, and its principle is to manufacture physical objects by adding materials to objects layer by layer. 3D printing technology has achieved a leap from plan to entity, and a series of digital application technologies represented by it are even called the third industrial revolution. 3D printing technologies mainly include SLA, FDM, SLS, LOM and other processes. Among them, both fused deposition modeling (FDM) and selective laser sintering (SLS) technologies use thermoplastics as the basic 3D printing materials. However, the most serious problem and challenge facing 3D printing technology at present is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K13/06C08K9/02C08K9/06C08K9/04C08K7/00C08K3/04C08K3/34C08K3/26B29B9/06
CPCC08K3/26C08K3/34C08K7/24C08K9/02C08K9/04C08K9/06C08K13/06C08K2003/265C08K2201/003C08K2201/014C08L2207/062C08L23/06
Inventor 杜世振张文娟杨文泓邢其锋孙文华马永梅赵宁董金勇李春成符文鑫林学春
Owner INST OF CHEM CHINESE ACAD OF SCI
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