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A kind of preparation method of peek modified ptfe profile continuous extrusion

A profile and continuous technology, which is applied in the field of continuous extrusion of PEEK modified PTFE profiles, can solve the problems of difficult processing of PTFE materials, complicated preparation processes, and inability to continuous production, and achieve good wear resistance, increased dispersibility, high The effect of tensile strength

Active Publication Date: 2021-10-12
CHANGZHOU HUA JUN SPECIAL ENG PLASTICS PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the technical problems of difficult processing of PTFE materials, complex preparation process and non-continuous production, a preparation method for continuous extrusion of PEEK modified PTFE profiles is provided

Method used

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  • A kind of preparation method of peek modified ptfe profile continuous extrusion
  • A kind of preparation method of peek modified ptfe profile continuous extrusion
  • A kind of preparation method of peek modified ptfe profile continuous extrusion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method for continuous extrusion of PEEK modified PTFE profiles, comprising the steps of:

[0030] (1) Cool the PTFE material in an ice room with a temperature of less than 0°C for 2 hours to ensure that the PTFE does not agglomerate and agglomerate. After cooling, take it out and pre-mix it with PEEK, dispersant-stearamide and paraffin for multiple times to form a mixture material, the pre-mixing is carried out with a mixer, and the mixer is connected with cooling water to cool down the mixer to ensure that the temperature of the mixture is lower than 40 ° C, mixing 5 times, each time for 3 minutes; wherein the PTFE The mass ratio to PEEK is 9:1; the amount of stearamide and paraffin added accounts for 0.15% of the total mass of PTFE and PEEK, and the mass ratio of stearamide to paraffin is 1:2;

[0031] (2) Add the mixture of step (1) into the plunger extruder for continuous extrusion. The barrel temperature of the plunger extruder is 390° C. The time is...

Embodiment 2

[0034] A preparation method for continuous extrusion of PEEK modified PTFE profiles, comprising the steps of:

[0035] (1) Cool the PTFE material in an ice room with a temperature of less than 0°C for 1 hour to ensure that the PTFE does not agglomerate and agglomerate. After cooling, take it out and pre-mix it with PEEK, dispersant-stearamide several times to form a mixture. The premixing is carried out with a mixer, and the mixer is connected with cooling water to cool down the mixer, ensuring that the temperature of the mixture is lower than 40°C, and mixing 6 times, each time for 1 minute; wherein the PTFE and PEEK The mass ratio is 9:0.5; the amount of stearamide added accounts for 0.1% of the total mass of PTFE and PEEK;

[0036](2) Add the mixture of step (1) into the plunger extruder for continuous extrusion. The barrel temperature of the plunger extruder is 370° C. The time is 80s, the die compression ratio of the plunger extruder is 1.5, and finally a PEEK modified P...

Embodiment 3

[0038] A preparation method for continuous extrusion of PEEK modified PTFE profiles, comprising the steps of:

[0039] (1) The PTFE material is placed in an icehouse with a temperature of less than 0°C for cooling for 3 hours to ensure that the PTFE does not agglomerate and agglomerate, and after cooling, it is taken out and premixed with PEEK, dispersant-paraffin for multiple times to form a mixture. The pre-mixing is carried out with a mixer, and the mixer is connected with cooling water to cool down the mixer, ensuring that the temperature of the mixture is lower than 40°C, and mixing 3 times for 5 minutes each time; the quality of the PTFE and PEEK The ratio is 9:0.8; the amount of paraffin added accounts for 0.4% of the total mass of PTFE and PEEK;

[0040] (2) Add the mixture of step (1) into the plunger extruder for continuous extrusion. The barrel temperature of the plunger extruder is 380° C. The time is 30s, the die compression ratio of the plunger extruder is 1.8, ...

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Abstract

The invention relates to a preparation method for continuous extrusion of PEEK modified PTFE profiles, comprising the following steps: (1) placing the PTFE material in an ice house for cooling, taking it out after cooling and performing multiple premixing with PEEK and a dispersant to form a compound, The premixing needs to ensure that the temperature of the mixed material is lower than 40° C.; (2) adding the mixed material in step (1) into a plunger extruder for continuous extrusion to obtain a PEEK modified PTFE profile. The barrel temperature of the plunger extruder is 370°C to 390°C, the hydraulic reciprocating push cycle time of the plunger extruder is 30s to 80s, and the die compression ratio of the plunger extruder is 1 ~1.8. The method of the present invention can be molded at one time, and the PTFE material can be produced in the mode of continuous extrusion, and the preparation process is simple, which simplifies the processing of the PTFE material, and the prepared PEEK modified PTFE profile has higher tensile strength and is relatively Good wear resistance.

Description

technical field [0001] The invention relates to the technical field of polymer material preparation technology, in particular to a preparation method for continuous extrusion of PEEK modified PTFE profiles. Background technique [0002] Polytetrafluoroethylene (PTFE) is a thermoplastic material with excellent properties. It has a low coefficient of friction, good self-lubricating properties and excellent corrosion resistance. It is an ideal insulation, anti-friction and self-lubricating material. However, it is difficult to process by ordinary thermoplastic molding methods. Its "difficult processability" comes from its special formability, such as PTFE's extremely low surface energy, poor wear resistance, high melt viscosity, shear sensitivity, large shrinkage creep. The relative molecular mass of PTFE is generally between 5×10 5 ~50×10 5 Between g / mol, and because there is no branch in the PTFE molecular chain, the fluorine atoms are closely arranged around the carbon-ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/18C08L61/16C08L91/06C08K5/20B29C48/06B29K27/18
CPCB29K2027/18B29C48/022B29C48/06C08L27/18C08L2205/03C08L61/16C08L91/06C08K5/20
Inventor 朱冠南谭宗尚李军冯习叶云峰束英杰
Owner CHANGZHOU HUA JUN SPECIAL ENG PLASTICS PROD
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