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Polylactic acid/carbon dioxide polymer degradation type composite material

A technology of carbon dioxide and composite materials, applied in the field of composite materials, can solve problems such as poor impact strength, reduced physical properties, and application constraints, and achieve the effects of good thermal stability, excellent mechanical properties, and easy processing and molding

Inactive Publication Date: 2007-09-12
吉林金源北方科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the disadvantages of hard quality, brittleness and poor impact strength of polylactic acid, its physical properties will be reduced when stored at room temperature for a long time, so its use is restricted.

Method used

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  • Polylactic acid/carbon dioxide polymer degradation type composite material
  • Polylactic acid/carbon dioxide polymer degradation type composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: take each component by following formula (weight part):

[0019] carbon dioxide polymer 20

[0020] PLA 80

[0021] Plasticizer 15

[0022] Capping agent 1

[0023] The components are mixed in a high-speed mixer for 5 minutes, then cooled and stirred, discharged at 20-30°C, and then plasticized, extruded and granulated in a twin-screw or single-screw extruder. The temperature setting of the extruder is: 70-120°C in the feeding section, 130-155°C in the plasticizing section, and 130-150°C in the extrusion section. The screw speed is: 300 rpm. The film produced by this composite material has very good gloss, transparency and hand feeling, and can be used in the production of medical dressings and packaging materials. The tensile strength of the film made of the composite material is 30.50Mpa. Elongation at break: 402.25%, 45 days of intensive composting test, turned into small fragments that are difficult to pick up....

Embodiment 2

[0024] Embodiment 2: take each component by following formula (weight part)

[0025] carbon dioxide polymer 30

[0026] Polylactic acid 70

[0027] Acetyl tri-n-butyl citrate 15

[0028] Capping agent 1

[0029] The components are mixed in a high-speed mixer for 5 minutes, then cooled and stirred, discharged at 20-30°C, and then plasticized, extruded and granulated in a twin-screw or single-screw extruder. The temperature setting of the extruder is: 70-120°C in the feeding section, 130-155°C in the plasticizing section, and 130-150°C in the extrusion section. The screw speed is: 300 rpm. The film produced by this composite material has very good gloss, transparency and hand feeling, and can be used in the production of medical dressings and packaging materials. The tensile strength of the film made of the composite material is 32.28Mpa. Elongation at break: 423.36%, 60 days of intensive composting test, turned into small fragments that...

Embodiment 3

[0030] Embodiment 3: take each component by following formula (weight part)

[0031] carbon dioxide polymer 70

[0032] PLA 30

[0033] Acetyl tri-n-butyl citrate 10

[0034] Capping agent 1

[0035] The components are mixed in a high-speed mixer for 5 minutes, then cooled and stirred, discharged at 20-30°C, and then plasticized, extruded and granulated in a twin-screw or single-screw extruder. The temperature setting of the extruder is: 70-120°C in the feeding section, 130-155°C in the plasticizing section, and 130-150°C in the extrusion section. The screw speed is: 300 rpm. The film produced by this composite material has very good gloss, transparency and hand feeling, and can be used in the production of medical dressings and packaging materials. The tensile strength of the composite material is: 28.32Mpa. The elongation at break is 512%, and the degradation rate is 26.35% in the 45-day intensive composting test.

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Abstract

This invention relates to a degradation composite material of polylactide / carbon dioxide polymer, composed of 10 to 90 shares(weight) of carbon dioxide polymer, 10 ~ 90 shares of polylactic acid, 10 ~ 20 shares of acetyl Tributyl Citrate plasticizer, 1 ~ 5 of maleic anhydride end blocking agent. This invention has good mechanical properties, degradation, good thermal stability, easy processing and prototyping, good glossiness and transparency, which can apply to the production of medical dressings, packaging materials and others.

Description

technical field [0001] The invention relates to a composite material, in particular to a polylactic acid / carbon dioxide polymer degradable composite material. Background technique [0002] We know that the composite materials used in existing disposable medical infusion bags and infusion equipment are generally prepared by five-layer or seven-layer co-extrusion method, in which polyvinyl chloride or polyvinylidene chloride is the barrier layer, polyethylene, polyvinylidene chloride, etc. Acrylic is used as a protective layer, and two additional adhesive layers are required in the middle. The barrier layer is used to isolate oxygen and water vapor. It is generally made of polyvinyl chloride. Processing aids must be used in the processing of polyvinyl chloride. There is a problem of precipitation of additives during use and storage, which affects the health of patients. Moreover, medical materials generally need to be incinerated, and polyvinyl chloride is prone to produce hy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K5/10
Inventor 冯超
Owner 吉林金源北方科技发展有限公司
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