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Production process of nanometer modified superhigh-molecular-weight polyethylene wear-resisting pipe

An ultra-high molecular weight, nano-modification technology, applied in the field of pipe manufacturing, can solve the problems of low mechanical properties, low critical shear speed, high melt viscosity, etc., and achieve the effect of avoiding repeated heating, improving mechanical properties and smoothing the inner wall

Inactive Publication Date: 2012-06-20
YANGZHOU JUYE WEAR-RESISTANT COMPOSITE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ultra-high molecular weight polyethylene has high melt viscosity, poor fluidity, low critical shear velocity, and easy fracture of the melt during processing, and the produced products have low mechanical properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The production process of the nano-modified ultra-high molecular weight polyethylene wear-resistant pipe includes the following steps: including the following steps:

[0014] (1) Raw material preparation: In terms of mass percentage, 90% ultra-high molecular polyethylene resin, 3% nano-layered silicate, 2% Si 3 N 4 Mix well with 2% polyethylene wax and 3% graphite;

[0015] (2) Feeding and reaction extrusion molding: Add the uniformly mixed raw materials in step (1) into the barrel of the screw extruder, and under the action of barrel temperature and screw rotation, compaction and mixing, the solid raw materials are transformed into Liquid uniform melt, the uniform melt moves to the front end of the barrel with the rotation of the screw, and under the action of the rotation of the screw, passes through a die of a certain shape on the screw extruder to obtain a pipe that is consistent with the shape of the die; The rotation speed of the screw of the screw extruder is 6...

Embodiment 2

[0019] The production process of the nano-modified ultra-high molecular weight polyethylene wear-resistant pipe includes the following steps: including the following steps:

[0020] (1) Raw material preparation: In terms of mass percentage, 85% ultra-high molecular polyethylene resin, 4% nano-layered silicate, 5% Si 3 N 4 Mix well with 6% polyethylene wax and 3% graphite;

[0021] (2) Feeding and reaction extrusion molding: Add the uniformly mixed raw materials in step (1) into the barrel of the screw extruder, and under the action of barrel temperature and screw rotation, compaction and mixing, the solid raw materials are transformed into Liquid uniform melt, the uniform melt moves to the front end of the barrel with the rotation of the screw, and under the action of the rotation of the screw, passes through a die of a certain shape on the screw extruder to obtain a pipe that is consistent with the shape of the die; The rotation speed of the screw of the screw extruder is 6...

Embodiment 3

[0026] The production process of the nano-modified ultra-high molecular weight polyethylene wear-resistant pipe includes the following steps: including the following steps:

[0027] (1) Raw material preparation: In terms of mass percentage, 74% ultra-high molecular polyethylene resin, 5% nano-layered silicate, 8% Si 3 N 4 Mix well with 10% polyethylene wax and 3% graphite;

[0028] (2) Feeding and reaction extrusion molding: Add the uniformly mixed raw materials in step (1) into the barrel of the screw extruder, and under the action of barrel temperature and screw rotation, compaction and mixing, the solid raw materials are transformed into Liquid uniform melt, the uniform melt moves to the front end of the barrel with the rotation of the screw, and under the action of the rotation of the screw, passes through a die of a certain shape on the screw extruder to obtain a pipe that is consistent with the shape of the die; The rotation speed of the screw of the screw extruder is ...

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Abstract

The invention discloses a production process of a nanometer modified superhigh-molecular-weight polyethylene wear-resisting pipe, comprising the steps of (1) preparing raw materials in mass percentage, uniformly mixing 74-90% of superhigh-molecular-weight polyethylene resin, 3-5% of nanometer laminated silicate, 2-8% of Si3N4, 3-10% of polyethylene wax and 2-3% of graphite; (2) adding material, performing reacting, extruding and molding; (3) cooling, shaping and drawing; (4) cutting; (5) post treating. The flowing property of the superhigh-molecular-weight polyethylene is improved due to the adding of nanometer laminated silicate and Si3N4, so that the mechanical property of the product is improved and the wear resistance of the product can be improved by more than 40%.

Description

technical field [0001] The invention relates to a method for manufacturing a pipe, in particular to a production process for a nano-modified ultra-high molecular weight polyethylene wear-resistant pipe. Background technique [0002] The patent document with publication number CN101554773A discloses a production method of ultra-high molecular weight polyethylene wear-resistant pipe, including: mixing polyethylene powder and polyethylene sodium, extruding the mixed material on an extruder, extruding The final pipe is cooled and shaped with high temperature resistant and anti-wear oil, and the pipe is cut after shaping to meet the requirements of use. The equipment used in this process is an extrusion die (head) die with a certain shape and a series of auxiliary devices (including shaping, cooling, pulling, cutting, etc.). However, ultra-high molecular weight polyethylene has high melt viscosity, poor fluidity, low critical shear velocity and easy fracture of the melt during p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06F16L9/12C08K3/34C08K3/04B29C47/38B29C47/92B29C48/395B29C48/92
CPCB29C47/38B29C47/0023B29C47/0004B29C48/395B29C48/022B29C48/09
Inventor 乐少兵
Owner YANGZHOU JUYE WEAR-RESISTANT COMPOSITE MATERIAL CO LTD
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