A kind of polyether ether ketone thin tube extrusion production process and device

A polyether ether ketone thin tube and production process technology, which is applied in the direction of tubular objects, other household appliances, household appliances, etc., can solve the problems of product quality decline, product stress, and melt viscosity, etc., and achieve the elimination of internal stress and traction Appropriate speed and high yield

Active Publication Date: 2017-05-03
CHANGZHOU HUA JUN SPECIAL ENG PLASTICS PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high temperature required for PEEK melting and the high melt viscosity, it is prone to defects such as discontinuous production, uneven discharge, and high product stress during the capillary extrusion process, resulting in a decline in the quality of the finished product and a low yield that affects the use. Currently, it relies on foreign countries. import

Method used

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  • A kind of polyether ether ketone thin tube extrusion production process and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0025] See figure 1

[0026] The first step, raw material drying

[0027] Dry in a circulating air oven at 150°C for 4 hours. During the drying process, dust and impurities should be prevented from mixing into it, which will cause bad defects such as black spots on the product.

[0028] The second step, feeding process

[0029] The feeding meter is used for feeding to ensure that the hopper is not empty during the extrusion process to prevent air from entering, resulting in oxidation and air bubbles in the finished product. Materials of different grades cannot be mixed to prevent sundries and miscellaneous materials from entering and blocking the feeding port.

[0030] The third step, extrusion process

[0031] A 35mm single-screw extruder is used, and the barrel is divided into three sections for heating. The temperature of the feeding section is 345°C, the compression section is 365°C, the homogenization section is 375°C, the temperature of the head part is 380°C, and th...

Embodiment 2）

[0042] See figure 1

[0043] The first step, raw material drying

[0044] Dry in a circulating air oven at 150°C for 4.5 hours. During the drying process, dust and impurities should be prevented from mixing into it, which will cause bad defects such as black spots on the product.

[0045] The second step, feeding process

[0046] The feeding meter is used for feeding to ensure that the hopper is not empty during the extrusion process to prevent air from entering, resulting in oxidation and air bubbles in the finished product. Materials of different grades cannot be mixed to prevent sundries and miscellaneous materials from entering and blocking the feeding port.

[0047] The third step, extrusion process

[0048] A 35mm single-screw extruder is used, and the barrel is divided into three sections for heating. The temperature of the feeding section is 350°C, the compression section is 370°C, the homogenization section is 375°C, the temperature of the head part is 380°C, and ...

Embodiment 3）

[0061] See figure 1

[0062] The first step, raw material drying

[0063] Dry in a circulating air oven at 150°C for 5 hours. During the drying process, dust and impurities should be prevented from mixing into it, which will cause bad defects such as black spots on the product.

[0064] The second step, feeding process

[0065] The feeding meter is used for feeding to ensure that the hopper is not empty during the extrusion process to prevent air from entering, resulting in oxidation and air bubbles in the finished product. Materials of different grades cannot be mixed to prevent sundries and miscellaneous materials from entering and blocking the feeding port.

[0066] The third step, extrusion process

[0067] A 35mm single-screw extruder is used, and the barrel is divided into three sections for heating. The temperature of the feeding section is 355°C, the compression section is 375°C, the homogenization section is 385°C, the temperature of the head part is 380°C, and th...

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Abstract

The invention relates to a polyether-ether-ketone capillary extrusion production technology and equipment. The production process includes the steps of: (1) drying PEEK particles at 150 to 160 DEG C for 4-5 h; (2) feeding at a feeding port of an extruder at an uniform rate; (3) conducting fusion extrusion in the extruder; (4) fixing; (5) carrying out traction; and (6) cutting and curling. The invention performs accurate process design; and extrusion speed and traction speed are cleverly set that the extrusion speed is low and that the traction speed is appropriate, so that the two well cooperate to make uniform and smooth surface of extruded capillary. A subsequent heat treatment process on the polyether-ether-ketone capillary is reasonably designed to eliminate the internal stress and increase the crystallization and uniformity of PEEK, so as to realize uniform quality of the finished product. The head and mould connection of the extruder are provided with porous plates, and multilayer filters are added before the porous plates, so as to effectively remove carbonized resin and other impurities to ensure product quality.

Description

technical field [0001] The invention relates to a production method of polyether ether ketone thin tubes, in particular to a production process and device for extrusion of polyetheretherketone thin tubes. Background technique [0002] Polyetheretherketone (PEEK) is a special engineering plastic with excellent comprehensive properties, which was first successfully developed by the British Imperial Chemical Industries Company in the late 1970s. [0003] Polyetheretherketone (PEEK) capillary has special properties such as high strength, high purity, high temperature resistance, corrosion resistance, non-toxicity, and self-extinguishing properties. It is currently mainly used in analytical instruments and medical catheters. Due to the high temperature required for PEEK melting and the high melt viscosity, it is prone to defects such as discontinuous production, uneven discharge, and high product stress during the capillary extrusion process, resulting in a decline in the quality...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C47/00B29C47/08B29C47/68B29L23/00B29K71/00
CPCB29C48/09B29C48/69B29C71/02B29K2071/00B29L2023/22
Inventor 李强李军刘德均谭宗尚
Owner CHANGZHOU HUA JUN SPECIAL ENG PLASTICS PROD
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