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Formulation for super high molecular weight polythene article and preparation method thereof

A technology of ultra-high molecular weight and polyethylene, which is applied in the formulation and processing of thermoplastic polymer products, and can solve problems such as the loss of ultra-high properties

Inactive Publication Date: 2007-10-24
江苏联冠科技发展有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem that the UHMWPE pipe and sheet extrusion method is difficult to process and the molecular weight is greatly reduced during the process, resulting in the loss of ultra-high properties, the present invention provides a new type of ultra-high molecular weight polyethylene product prepared according to the concept of near melting point. The formula and its preparation method can produce products with a molecular weight of more than 2.5 million—such as pipes and plates

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Get 97% of the M3 type UHMWPE resin produced by Beijing Auxiliary No. 2 Factory, 2.8% of lubricant calcium stearate, 0.13% of nucleating agent silicon dioxide, 0.07% of rheological processing aid, the above components The content is calculated by weight percentage. After the above-mentioned components are metered and mixed, they are added to the mixer and fully mixed. The mixture is added to the single-screw extruder designed according to the concept of near melting point. The extrusion temperature is 100-200 ° C. Propelled in the screw, the preheated material is melted in the mold, cooled and solidified in the shaping section, and finally according to the selected mold, it can produce continuous and stable UHMWPE pipes or plates and profiles with a molecular weight of more than 2.5 million.

Embodiment 2

[0022] Get 96% of the M3 type UHMWPE resin produced by Beijing Auxiliary No. 2 Factory, 3.5% of lubricant molybdenum dioxide, 0.45% of nucleating agent sorbitol (DBS), 0.05% of rheology processing aid, the above components The content of the content is calculated by weight percentage. After the above-mentioned components are metered and mixed, they are added to the mixer and fully mixed. The mixture is added to the single-screw extruder designed according to the concept of near melting point. The extrusion temperature is 100-200 ° C. Propelled in the screw, the preheated material is melted in the mold, cooled and solidified in the shaping section, and finally, according to the selected mold, continuous and stable UHMWPE pipes or plates and profiles with a molecular weight of more than 2.5 million can be produced.

Embodiment 3

[0024] Get 93% of the M4 type UHMWPE resin produced by Beijing Auxiliary No. 2 Factory, 6.1% calcium stearate and polymer wax mixed into lubricant, 0.55% of silicon dioxide and aryl phosphate (TMP) mixed into Nucleating agent, 0.35% rheological processing aid, the content of each of the above components is calculated by weight percentage, after the above-mentioned components are metered and mixed, they are added to the mixer and fully mixed, and the mixture is added to the near melting point In the conceptually designed single-screw extruder, the extrusion temperature is 100-200°C and the screw is propelled. The preheated material is melted in the mold, cooled and solidified in the shaping section, and finally can produce continuous and stable molecular weight according to the selected mold. More than 2.5 million UHMWPE pipes or sheets and profiles.

[0025] The rheological processing aids in the above-mentioned embodiments are LCP liquid crystal polymers or Dyanmar PPA proces...

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Abstract

The invention discloses a super high molecular weight polyethylene (UHMWPE) product-as the dispense and the method preparing for the pipe materials and the sheet materials, which comprises the following parts: 92%-97% super high molecular weight polyethylene resin, 2-7. 5% lubricant, 0. 05%-0. 7% nuclearyer, 0. 01%-0. 4% rheology processing adjuvant. The method comprises the following steps: adding the every composition meter mixture to a helical rotor force out machine designed according to the approaching fusible point concept; forcing out at 100-200DEG C; plasticizing the materials in the die and cooling, congealing in the shape procedure after preheating the materials; producing the continuously stabilizing UHMWPE pipe materials with 2. 5 million molecular weight and 50-200mm diameter or the sheet materials with (5-20)X500 dimension. The invention can be applied in a plurality of trades and fields.

Description

technical field [0001] The present invention relates to a formulation and processing method of a thermoplastic polymer material product, in particular to a formulation and preparation method of an ultra-high molecular weight polyethylene product with a product molecular weight of more than 2.5 million—such as ultra-high molecular weight polyethylene pipes and plates . Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) was first successfully developed in 1957 by United Chemical Company of the United States with Ziegler catalyst. This is a linear polymer with a molecular weight of 1 million to 5 million, a crystallinity of 65-85%, and a density of 0.92-0.96g / cm 3 Compared with many polymer materials, UHMWPE has the characteristics of small friction coefficient, low wear and excellent chemical resistance, and also has impact resistance, pressure resistance, frost resistance, heat preservation, self-lubricating property, anti-corrosion Scale resist...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08K5/523B29C47/00
Inventor 王德禧黄学祥严为群李猛陈勇
Owner 江苏联冠科技发展有限公司
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