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Injection molding process of polymer material polylactic acid

A polymer material and injection molding technology, which is applied in the field of polymer material polylactic acid injection molding technology, can solve the problems of expensive imported medical devices, harsh injection molding process, poor thermal stability, etc., to achieve mass production and reduce medical costs. Costs, effects of broad social significance

Inactive Publication Date: 2011-12-28
SUZHOU SHIP BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are no research results published on the injection molding process of polylactic acid materials in China. With the increasing development of society, the application of biological materials has gradually become popular. As a biodegradable biomaterial, polylactic acid has extremely poor thermal stability and relatively low fluidity. Poor, and its injection molding process is quite harsh, so the application of polylactic acid materials in medical devices for human implantation cannot be produced in China. At present, absorbable medical devices for implantation in the human body mainly rely on imports from Europe and the United States. Medical devices are expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] Example 1: A polymer material polylactic acid injection molding process, the parameters of the injection molding machine are set as follows: Barrel temperature: first section 175°C, second section 180°C, third section 170°C; cooling time: 8 seconds ; Injection time: 2 seconds; Injection pressure: 90bar; Injection speed: 17.5cm / s (the calculated value of the moving speed of the screw during injection); Material shrinkage rate: 0.9%;

Embodiment 2

[0007] Example 2: A polylactic acid injection molding process for polymer materials. The parameters of the injection molding machine are set as follows: Cylinder temperature: 172°C for the first section, 177°C for the second section, and 167°C for the third section; cooling time: 7 seconds ; Injection time: 1 second; Injection pressure: 85bar; Injection speed: 15cm / s (the calculated value of the moving speed of the screw during injection); Material shrinkage rate: 0.8%;

Embodiment 3

[0008] Example 3: A polylactic acid injection molding process for polymer materials. The parameters of the injection molding machine are set as follows: Cylinder temperature: first section 178°C, second section 183°C, third section 173°C; cooling time: 9 seconds ; Injection time: 3 seconds; Injection pressure: 95bar; Injection speed: 20cm / s (the calculated value of the moving speed of the screw during injection); Material shrinkage rate: 1.0%;

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Abstract

The invention discloses a polymer material polylactic acid injection molding process. The parameters of the injection molding machine are set as follows: barrel temperature: the first section is 172-178°C, the second section is 177-183°C, and the third section is 167-173°C ;Cooling time: 7-9 seconds; Injection time: 1-3 seconds; Injection pressure: 85-95bar; Injection speed: 15-20cm / s (calculated value of screw moving speed during injection); Material shrinkage rate: 0.8- 1.0%; demoulding slope: 30-34 points. The process is simple, the cost is relatively low, and it provides the possibility for the localization of human implantable absorbable medical devices.

Description

technical field [0001] The invention relates to a polymer material polylactic acid injection molding process. Background technique [0002] At present, there are no research results published on the injection molding process of polylactic acid materials in China. With the increasing development of society, the application of biological materials has gradually become popular. As a biodegradable biomaterial, polylactic acid has extremely poor thermal stability and relatively low fluidity. Poor, and its injection molding process is quite harsh, so the application of polylactic acid materials in medical devices for human implantation cannot be produced in China. At present, absorbable medical devices for implantation in the human body mainly rely on imports from Europe and the United States. Medical devices are expensive. Contents of the invention [0003] In order to overcome the above-mentioned defects, the present invention provides a polymer material polylactic acid injec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/76
Inventor 葛建伟
Owner SUZHOU SHIP BIOLOGICAL TECH
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