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Modified ultrahigh molecular polyethylene for 3D printing and preparation method thereof

An ultra-high molecular weight polyethylene technology, which is applied in the field of modified ultra-high molecular weight polyethylene materials and its preparation, can solve the problems of difficult handling, poor fluidity, difficult processing and molding, etc., and achieves low production cost, easy industrial production, and production. Simple process effect

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
Therefore, the purpose of the present invention is to propose a method for improving the melt fluidity of UHMWPE materials in view of the current characteristics of low melt flow rate, high viscosity, poor fluidity and extremely difficult to be processed by injection molding.

Method used

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  • Modified ultrahigh molecular polyethylene for 3D printing and preparation method thereof
  • Modified ultrahigh molecular polyethylene for 3D printing and preparation method thereof
  • Modified ultrahigh molecular polyethylene for 3D printing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1) First dry molybdenum disulfide at 160°C for 4 hours, weigh and disperse in ethanol medium, stir with electric mixer for 30 minutes until uniform, 5 parts of modifier polymethyl methacrylate, 0.2 parts of coupling Add isopropyl tri(isostearyl) titanate into the dispersion medium, and stir for another 30 minutes until uniform. Then, shake and disperse in an ultrasonic oscillator for 1 hour, then dry to constant weight, and set aside.

[0049] 2) 95 parts by weight of UHMWPE, 30 parts of low density polyethylene, 10 parts of carbon nanotubes, 5 parts of molybdenum disulfide, 0.1 part of antioxidant CA, and the product obtained in step 1) are added to the high-speed Mix evenly in a mixer, fully mix and grind for 1 hour and then discharge.

[0050] 3) Add the mixture obtained in step 2) into a twin-screw extruder with an aspect ratio of 36 to extrude and granulate to prepare UHMWPE pellets. The residence time of the material in the extruder was 3 minutes. The temperatu...

Embodiment 2

[0055] 1) 90 parts by weight of UHMWPE, 35 parts of low-density polyethylene, 10 parts of carbon nanotubes, 10 parts of talcum powder, 2 parts of polymethyl methacrylate, 0.5 parts of antioxidant CA, 0.5 parts of iso Propyl tri(isostearyl) titanate was added into a high-speed mixer and mixed uniformly, fully mixed and ground for 1 hour, and then discharged.

[0056] 2) Add the mixture obtained in step 1) into a twin-screw extruder with an aspect ratio of 36 to extrude and granulate to prepare UHMWPE pellets. The residence time of the material in the extruder was 5 minutes. The temperature of the extruder is set in order: the temperature distribution of each section of the barrel from the feed port to the die is 235, 245, 250, 255, 240, 240 °C, and the speed of the main engine is 300r / min.

[0057] 3) The pellets obtained in step 3 are injection molded into a standard sample through an injection molding machine. Injection molding process parameters: the temperature distributi...

Embodiment 3

[0061] 1) 95 parts by weight of UHMWPE, 40 parts of low-density polyethylene, 15 parts of carbon nanotubes, 10 parts of glass beads, 3 parts of polymethyl methacrylate, 0.5 parts of antioxidant CA, 0.5 parts of silane are added to Mix evenly in a high-speed mixer, fully mix and grind for 1 hour and then discharge.

[0062] 2) Add the mixture obtained in step 1) into a twin-screw extruder with an aspect ratio of 36 to extrude and granulate to prepare UHMWPE pellets. The residence time of the material in the extruder was 5 minutes. The temperature of the extruder is set in order: the temperature distribution of each section of the barrel from the feed port to the die is 240, 250, 260, 260, 250, 250 °C, and the main engine speed is 300r / min.

[0063] 3) The pellets obtained in step 3 are injection molded into a standard sample through an injection molding machine. Injection molding process parameters: the temperature distribution of each section of the barrel from the feed inle...

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Abstract

A modified ultrahigh molecular polyethylene material for 3D printing comprises the following components, by weight, 80-95 parts of ultrahigh molecular polyethylene, 30-40 parts of low-density polyethylene, 10-15 parts of carbon nanotube, 1-10 parts of an inorganic filling material, 1-5 parts of a modifier, 0.1-0.5 part of an antioxidant and 0.1-0.5 part of a coupling agent. The modified UHMWPE material provided by the invention has good melt fluidity, heat resistance and abrasion resistance. By the preparation method, the ultrahigh molecular polyethylene is more in line with characteristics of a 3D printing material, and the ultrahigh molecular polyethylene has a wide application prospect in the 3D printing technology.

Description

technical field [0001] The invention relates to a modified ultra-high molecular weight polyethylene material and a preparation method thereof, in particular to a modified ultra-high molecular weight polyethylene material for 3D printing and a preparation method thereof. Background technique [0002] 3D printing technology mainly includes 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. [0003] As a thermoplastic engineering plastic with a very high molecular weight with a linear structure, the molecular structure of ultra-high molecular weight polyethylene (UHMWPE) is basically the same as that of ordinary polyethylene materials. However, due to its high molecular weight, UHMWPE has excellent impact resistance, wear resistance, self-lubrication, chemical corrosion resistance and other properties that are unparalleled by other plast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K9/04C08K3/30C08K3/34C08K7/28C08K3/36C08K7/00C08K3/04
CPCB29B9/06B29C48/92B29C2948/9259B29C2948/92704C08K2201/011C08L23/06C08L2201/08C08L2205/025C08L2205/03C08L2207/066C08L33/12C08K13/06C08K9/04C08K7/24C08K2003/3009C08K5/13C08K3/34C08K7/20C08L33/08C08K3/36C08L33/10
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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