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Ultra-high molecular weight polyethylene material with processing fluidity and preparation method thereof

An ultra-high molecular weight and processing fluidity technology, applied in the field of ultra-high molecular weight polyethylene materials and their preparation, can solve problems such as insufficient processing fluidity, and achieve excellent chemical corrosion resistance, high impact resistance, and good self-lubrication. Effect

Active Publication Date: 2016-06-01
广东道生科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of PP and self-made processing aids can effectively improve the fluidity of UHMWPE, while maintaining its mechanical properties and friction and wear properties, and solve the production problems of UHMWPE materials due to insufficient processing fluidity

Method used

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  • Ultra-high molecular weight polyethylene material with processing fluidity and preparation method thereof
  • Ultra-high molecular weight polyethylene material with processing fluidity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] First bake 85% by weight of UHMWPE resin at 90°C for 4 hours to control the moisture below 0.1%; then bake 10% by weight of PP resin at 90°C for 4 hours to control the moisture below 0.1%, a self-made composite of 4% by weight Processing aids, 0.5% by weight of antioxidant, 0.5% by weight of other additives are mixed by a high-speed mixer for 2 minutes and then enter the twin-screw extruder from the metering feeder to be plasticized and melted, then extruded and cooled , air-dried, diced, over-strong magnetic, and packaged to obtain the product.

Embodiment 2

[0027] First bake 78% by weight of UHMWPE resin at 90°C for 4 hours to control the moisture below 0.1%; then bake 15% by weight of PP resin at 90°C for 4 hours to control the moisture below 0.1%, a self-made compound of 5% by weight Processing aid, 0.6% by weight of antioxidant, 1.4% by weight of other additives are mixed by a high-speed mixer for 2 minutes and then enter the twin-screw extruder from the metering feeder to be plasticized and melted, then extruded and cooled , air-dried, diced, over-strong magnetic, and packaged to obtain the product.

Embodiment 3

[0029] First bake 55% by weight of UHMWPE resin at 90°C for 4 hours to control the moisture below 0.1%; then bake 40% by weight of PP resin at 90°C for 4 hours to control the moisture below 0.1%, a self-made compound of 3% by weight Processing aid, 0.6% by weight of antioxidant, 1.4% by weight of other additives are mixed by a high-speed mixer for 2 minutes and then enter the twin-screw extruder from the metering feeder to be plasticized and melted, then extruded and cooled , air-dried, diced, over-strong magnetic, and packaged to obtain the product.

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PUM

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Abstract

The invention aims at preparing an ultra-high-molecular-weight polyethylene (UHMWPE) material with certain processing fluidity. By studying the effects of polypropylene (PP) with different fluidities on the processing rheological properties of UHMWPE and carrying out processing rheological modification on UHMWPE via adding a PEG (Polyethylene Glycol) / diatomite compound processing aid and a PEG / glass microsphere (PPA2) compound processing aid, a UHMWPE / PP blend which meets the requirement on the fluidity is prepared. The UHMWPE material has the advantages that on the premise that the excellent mechanical properties and friction-wear properties are maintained, the processing rheological properties of the UHMWPE / PP blend system are significantly improved while the viscosity-reducing mechanism of the compound processing aids on the UHMWPE is revealed. The preparation of the processing fluidity modified material is conductive to continuous, efficient and large-scale production of UHMWPE products, the problem of production caused by poor fluidity of the UHMWPE is solved, and techniques such as screw extrusion and injection molding can be directly applied to carrying out processing and the production patterns are diversified.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to an ultra-high molecular weight polyethylene material with certain processing fluidity and a preparation method thereof. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) is a thermoplastic engineering plastic with a molecular weight of more than 1.5 million and a linear structure. UHMWPE has many advantages such as high wear resistance, high impact resistance, good self-lubrication, excellent chemical corrosion resistance, low temperature resistance, non-water absorption, and the smallest density among all engineering plastics. It is widely used in industries. It is widely used in pipes, textile machinery, construction, electric power and agricultural machinery, paper industry, food machinery, medical treatment, cultural and sports fields and other fields. However, ultra-high molecular weight polyethylene has extremely poor fluidity when i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/12C08L51/06C08K7/28C08K3/34
CPCB29C48/92B29C2948/9258B29C2948/92704C08L23/06C08L2205/03C08L2207/068C08L23/12C08L51/06C08K13/04C08K7/20C08K3/34
Inventor 李本立郑少辉
Owner 广东道生科技股份有限公司