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Preparation method of thermoplastic carbon fiber composite material for medical instruments

A technology of medical devices and composite materials, which is applied in the field of preparation of carbon fiber composite materials for thermoplastic medical devices, can solve problems such as difficult secondary shaping, achieve good compatibility, good promotion and use value, and reduce pain.

Inactive Publication Date: 2019-05-14
LIANYUNGANG YINGYOU HEDA MOLD MFG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) It solves the problem that it is difficult to shape the traditional medical device once it is formed. For example, it solves the problem of secondary shape change when the orthopedic prosthesis for polio patients varies from person to person, and accelerates the application of carbon fiber in medical devices. The application in the field has good promotion and use value;

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Preparation of prepreg by melting impregnation: melt the sheet-like thermoplastic PEK resin matrix (content 60%) at a temperature of 400°C, and then impregnate acrylonitrile-based carbon fibers through the molten resin at a speed of 5cm / s, The resin-impregnated fiber is cooled to obtain a prepreg;

[0026] 2) Laying: Take the medical device model prosthesis, and lay carbon fiber prepreg on the inner layer of the prosthesis mold, 15 layers of prepreg for the leg prosthesis, and 12 layers of prepreg for the hand;

[0027] 3) Molding: Molding is carried out by melting and pressing. The heat source of the melting and pressing is electric conduction heating. The prosthetic mold is energized, and the temperature of the melting and pressing is set to 300°C, the pressure is 35 MPa, and the time is 45 minutes.

Embodiment 2

[0029] 1) Preparation of prepreg by fluidized bed impregnation: pass each bundle of acrylonitrile-based carbon fiber through a fluidized bed with thermoplastic PEK resin powder (content 60%), and the resin powder is suspended in one or more air streams, and the air stream is in Pass through the fiber under controlled pressure, and the resin powder deposited on the carbon fiber will be deposited on the carbon fiber, then heated to a temperature of 400°C in a melting furnace to melt the resin and adhere to the carbon fiber, and then pass through the cooling and shaping section to make the surface uniform and smooth , and finally wind up the prepreg through the winding device;

[0030] 2) Laying: Take the medical device model, such as prosthesis, bone plate, etc., lay carbon fiber prepreg on the inner layer of the prosthesis mold and the surface of the bone plate, use 15 layers of prepreg for the leg prosthesis, and use 12 layers of prepreg for the hand. layer;

[0031] 3) Moldi...

Embodiment 3

[0033] 1) Preparation of prepreg by melting impregnation: melt the plate-like thermoplastic PP resin matrix (content 50%) at a temperature of 500°C, and then add acrylonitrile-based carbon fibers, pitch-based carbon fibers and viscose-based carbon fibers at 5cm / The speed of s is impregnated by molten resin, and the resin-impregnated fiber is cooled to obtain a prepreg;

[0034] 2) Laying: Take the medical device model prosthesis, and lay carbon fiber prepreg on the inner layer of the prosthesis mold, 15 layers of prepreg for the leg prosthesis, and 12 layers of prepreg for the hand;

[0035] 3) Molding: Molding is performed by melting and pressing. The heat source of the melting and pressing is electric conduction heating. The prosthesis mold is energized, and the temperature range of the melting and pressing is set to 400°C, the pressure range is 10 MPa, and the time is 45 minutes.

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Abstract

The invention provides a preparation method of the thermoplastic carbon fiber composite material for medical instruments. The carbon fiber composite material takes a high-performance special carbon fiber as a reinforcing body, a high-performance thermoplastic resin matrix is taken as an adhesive, the high-performance thermoplastic resin matrix is subjected to melt compression molding to prepare the medical instrument, so that the problems that the traditional carbon fiber reinforced thermosetting resin composite material is difficult to recover, impact resistance and wear resistance in the useof medical instruments are effectively overcome, the defects of poor moisture resistance, heat aging resistance and high temperature resistance are overcome, the problem that the traditional medicalinstrument is difficult to form twice once forming is solved, and the medical instrument has good popularization and application values.

Description

technical field [0001] The invention relates to the technical field of composite materials for preparing high-performance medical devices, in particular to a method for preparing carbon fiber composite materials for thermoplastic medical devices. Background technique [0002] Traditional carbon fiber reinforced thermosetting resin composites have the characteristics of difficulty in recycling, insufficient impact resistance, abrasion resistance, damp heat aging resistance and high temperature resistance, and once formed, they cannot be reshaped. These characteristics hinder the use of carbon fiber in the field of medical devices. Applications. For example, the prosthetic limbs of the disabled can change the materials involved in the invention to the required size through post-heating, and then cool and solidify to make the same size meet the needs of different patients; for example, medical bone plates and other products that require repeated high-temperature sterilization, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/30B29L31/00
Inventor 尚武林徐亚飞周恒香吕严许春婷顾良娥
Owner LIANYUNGANG YINGYOU HEDA MOLD MFG
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