Ultra-light and high resilience bionic prosthesis and forming process thereof

A molding process and high resilience technology, applied in the field of bionic prosthesis and its molding process, can solve the problem that the comfort and mechanical properties of the prosthesis cannot meet the needs of users at the same time, and achieve the inhibition of bacterial growth, good low temperature performance, and mechanical properties. strong effect

Inactive Publication Date: 2019-03-15
NINGBO GMF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is that the existing prosthetics cannot simultaneously meet the needs of users in terms of wear, comfort and mechanical properties.

Method used

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  • Ultra-light and high resilience bionic prosthesis and forming process thereof
  • Ultra-light and high resilience bionic prosthesis and forming process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The molding process of the ultra-light and high-resilience bionic prosthesis of this embodiment is as follows:

[0032] When synthesizing the TPU raw materials, add 0.5% of the component flesh-colored powder and 2% of the antibacterial agent, and the rest is TPU, selected from polyether polyurethane. After mixing, it is synthesized and granulated to prepare a TPU composite material. The TPU composite material particles are obtained by down-cutting, and the particle size is controlled at about 3mm.

[0033] Put the TPU composite material particles into a supercritical carbon dioxide permeation kettle, pass in carbon dioxide and pressurize, so that the pressure reaches 10Mpa and the temperature is 35°C. At this time, the carbon dioxide is in a supercritical state. In this state, pressurize and infiltrate for 3 hours, quickly release the pressure and heat to about 130°C, at this time, the TPU composite material is foamed to obtain E-TPU composite material foamed particles....

Embodiment 2

[0040] The molding process of the ultra-light and high-resilience bionic prosthesis of this embodiment is as follows:

[0041] When synthesizing the TPU raw materials, add 3% of the flesh-colored powder and 1% of the antibacterial agent, and the rest is TPU. TPU composite material particles are obtained by underwater pelletizing, and the particle size is controlled at about 4mm.

[0042] Put the TPU composite material particles into a supercritical carbon dioxide permeation kettle, pass in carbon dioxide and pressurize, so that the pressure reaches 7.38Mpa and the temperature is 35°C. At this time, the carbon dioxide is in a supercritical state. In this state, pressurize and infiltrate for 1 hour, quickly release the pressure and heat to about 130°C, at this time, the TPU composite material is foamed to obtain E-TPU composite material foamed particles. Put the foamed particles into steam molding equipment for steam molding. The steam pressure is controlled at 0.3MPa, the stea...

Embodiment 3

[0044] The molding process of the ultra-light and high-resilience bionic prosthesis of this embodiment is as follows:

[0045] When synthesizing the TPU raw materials, add 3% of the flesh-colored powder and 2.5% of the antibacterial agent, and the rest is TPU. The TPU is selected from polyether polyurethane and / or polyester polyurethane. After mixing, it is synthesized and granulated. The TPU composite material is prepared, and the TPU composite material particles are obtained by underwater pelletizing, and the particle size is controlled at about 4 mm.

[0046] Put the TPU composite material particles into a supercritical carbon dioxide permeation kettle, pass in carbon dioxide and pressurize, so that the pressure reaches 15Mpa and the temperature is 31°C. At this time, the carbon dioxide is in a supercritical state. In this state, pressurize and infiltrate for 3 hours, quickly release the pressure and heat to about 130°C, at this time, the TPU composite material is foamed to...

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Abstract

The invention discloses an ultra-light and high resilience bionic prosthesis and a forming process thereof. The bionic prosthesis is prepared from a TPU (thermoplastic polyurethanes) foaming materialthrough steam compression molding, and comprises the following raw materials: TPU, flesh-colored toner and an antibacterial agent; the forming process comprises the following steps: synthesizing a TPUcomposite material, pelletizing the TPU composite material underwater, then placing the pelletized TPU composite material in a high pressure reactor, pressurizing and heating to enable carbon dioxideto reach a supercritical state, quickly depressurizing after permeation, quickly putting the infiltrated TPU composite material particles into foaming equipment for heating and foaming to prepare TPUfoamed particles, and then putting the TPU foamed particles into steam molding equipment for steam compression molding to obtain a product of bionic prosthesis. The bionic prosthesis prepared with the forming process has ultra-light density, ultra-high resilience, wear resistance, folding resistance and strong antibacterial property, and provides a comfortable experience for a wearer.

Description

technical field [0001] The invention relates to the field of polymer microporous foaming and medical bionic prosthetics, in particular to a microporous foaming material with ultra-light density and ultra-high resilience and its molding process, in particular to a microporous foam material with ultra-light density , ultra-high resilience, wear-resistant, folding-resistant bionic prosthesis and its molding process. Background technique [0002] Prosthetics are artificial prostheses specially designed and fabricated to compensate for amputees or incompletely missing limbs by means and methods of engineering technology, also known as "prosthetics". Its main function is to replace part of the functions of the lost limbs, so that the amputees can recover a certain degree of self-care and work ability. [0003] The existing commonly used materials for prosthetics are mainly alloys and polymer materials. Among them, alloys can meet the requirements of high mechanical properties suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L75/06C08J9/12
CPCC08J9/0061C08J9/122C08J2203/06C08J2203/08C08J2205/044C08J2375/06C08J2375/08C08J2475/06C08J2475/08
Inventor 秦柳马文良梁宇光张聪
Owner NINGBO GMF TECH
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