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Preparation process of polytetrafluoroethylene composite filler

A polytetrafluoroethylene and composite filler technology, which is applied in the production field of fillers, can solve the problems of restricting the application and development of fillers, insufficient hardness, etc., and achieve the effect of preventing cracking and stabilizing the properties of fillers

Inactive Publication Date: 2020-06-09
江苏亿豪塑业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing fillers made of polytetrafluoroethylene still have certain deficiencies in their hardness, which will restrict the application and development of fillers to a large extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of preparation technology of polytetrafluoroethylene composite filler, it comprises the steps:

[0022] (1) Mixed grinding of raw materials: Take 3 parts of raw material graphene and 45 parts of polytetrafluoroethylene and add them to the grinding equipment for co-grinding for 8 hours, and then add 0.5 parts of reinforcing agent, 0.2 parts of heat stabilizer and 0.3 parts of flux to the grinding equipment Grind for 3 hours to obtain raw material premixed powder;

[0023] (2) Raw material mixing: Dissolve the raw material premix powder obtained above in a solvent, and after ultrasonic dispersion for 0.6h, vacuum filter the solvent to obtain the final premix;

[0024] (3) Pre-compression molding: Add the final premixed material obtained through step (2) into the cavity of the mold, place it on a press for pressing, and use slow pressure and slow pressure reduction during pressurization. method, the pressure rises and falls at a speed of 1MPa / s, and when a certain ...

Embodiment 2

[0029] A kind of preparation technology of polytetrafluoroethylene composite filler, it comprises the steps:

[0030] (1) Mixed grinding of raw materials: Take 4 parts of raw material graphene and 48 parts of polytetrafluoroethylene and add them to the grinding equipment for co-grinding for 10 hours, and then add 0.7 parts of reinforcing agent, 0.3 parts of thermal stabilizer and 0.5 parts of flux to the grinding equipment Grind for 4 hours to obtain raw material premixed powder;

[0031] (2) Raw material mixing: Dissolve the raw material premix powder obtained above in a solvent, and after ultrasonic dispersion for 0.7h, vacuum filter the solvent to obtain the final premix;

[0032] (3) Pre-compression molding: Add the final premixed material obtained through step (2) into the cavity of the mold, place it on a press for pressing, and use slow pressure and slow pressure reduction during pressurization. method, the pressure rises and falls at a speed of 1MPa / s, and when a cert...

Embodiment 3

[0037] A kind of preparation technology of polytetrafluoroethylene composite filler, it comprises the steps:

[0038] (1) Mixed grinding of raw materials: Take 5 parts of raw material graphene and 52 parts of polytetrafluoroethylene and add them to the grinding equipment for co-grinding for 12 hours, and then add 0.8 parts of reinforcing agent, 0.5 parts of thermal stabilizer and 0.7 parts of flux to the grinding equipment Grind for 5 hours to obtain raw material premixed powder;

[0039] (2) Raw material mixing: Dissolve the raw material premix powder obtained above in a solvent, ultrasonically disperse for 0.8h, and vacuum filter the solvent to obtain the final premix;

[0040] (3) Pre-compression molding: Add the final premixed material obtained through step (2) into the cavity of the mold, place it on a press for pressing, and use slow pressure and slow pressure reduction during pressurization. method, the pressure rises and falls at a speed of 1MPa / s, and after reaching ...

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PUM

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Abstract

The invention discloses a preparation process of a polytetrafluoroethylene composite filler, wherein the process comprises the following steps: raw material mixing and grinding, raw material mixing, pre-pressing molding, demolding, sintering, galling and cutting, wherein graphene for enhancing the strength of the polytetrafluoroethylene composite filler is added in the preparation of the polytetrafluoroethylene composite filler. The graphene is added during preparation of the polytetrafluoroethylene filler, so that the strength of the prepared filler can be improved, and the limitation of thehardness on the application of the filler is relieved. Through mixing and grinding of the two, raw material particles can be fully and uniformly mixed, and unstable filler properties caused by non-uniform distribution of raw material molecules due to a clustering phenomenon caused by too small particle size of powder particles are avoided. Heating and pressurizing are performed slowly, so that theprepared filler can be prevented from cracking, and the prepared filler is more stable in property.

Description

technical field [0001] The invention relates to the production technology of fillers, in particular to a preparation process of polytetrafluoroethylene composite fillers. Background technique [0002] Polytetrafluoroethylene (Teflon or PTFE), commonly known as the "King of Plastics", is a polymer compound formed by polymerization of tetrafluoroethylene, which has excellent chemical stability, corrosion resistance, sealing, high lubrication and non-stick properties, electrical Insulation and good aging resistance. As an engineering plastic, it has a good application development in various fields. [0003] The existing fillers made of polytetrafluoroethylene still have certain deficiencies in their hardness, which will restrict the application and development of fillers to a large extent. Contents of the invention [0004] The purpose of the present invention is to provide a preparation process for polytetrafluoroethylene composite fillers against the deficiencies of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08K3/04
CPCC08K3/042C08L27/18
Inventor 姚袁生仇桂芹
Owner 江苏亿豪塑业股份有限公司
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