Polylactic acid foam material and preparation method thereof

A foam material, polylactic acid technology, applied in the field of foam materials, can solve problems such as environmental pollution, and achieve the effect of good biodegradability

Active Publication Date: 2014-03-19
天津佰盛环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the blowing agents used are N-nitroso compound blowing agents, azo blowing agents and hyd

Method used

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  • Polylactic acid foam material and preparation method thereof
  • Polylactic acid foam material and preparation method thereof
  • Polylactic acid foam material and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0034] The present invention also provides a preparation method of the polylactic acid foam material, comprising:

[0035] Stir the following raw materials and then extrude and foam to obtain a polylactic acid foam material;

[0036]

[0037] According to the present invention, the polylactic acid foam material is directly prepared by direct extrusion. In the process of preparing polylactic acid foam, first mix polylactic acid, water, carrier, plasticizer, nucleating agent, anti-hydrolysis agent and chain extender, and then stir. The stirring time is preferably 3 to 5 minutes, so that the above Raw materials can be mixed evenly.

[0038]After the above materials are stirred, the obtained mixture is directly extruded and foamed to obtain a polylactic acid foam material. The present application preferably extrudes foaming in a twin-screw extruder. During the process of extruding and foaming, the heating system of the twin-screw extruder is divided into different areas, so ...

Embodiment 1

[0043] Weigh each component according to the following parts by weight: 100 parts of polylactic acid with a weight-average molecular weight of 50,000, 0.5 part of water, and 1 part of starch. Extrude and foam to obtain polylactic acid foam; the temperature range of the extrusion foaming system is: Zone 1: 50°C, Zone 2: 50°C, Zone 3: 100°C, Zone 4: 120°C, Zone 5: 130°C , Zone six: 130°C, zone seven: 120°C, the temperature of the die head is 100°C. The expansion ratio of the polylactic acid foam prepared in this example is 1 times, and the compressive strength is 10 MPa.

Embodiment 2

[0045] Weigh each component according to the following parts by weight: 100 parts of polylactic acid with a weight average molecular weight of 200,000, 15 parts of water, 90 parts of starch, 20 parts of dioctyl phthalate, 15 parts of zinc oxide, carbodiimide 3 parts, 5 parts of toluene diisocyanate. Stir the above components in the mixer for 3 minutes, then directly extrude and foam on the twin-screw to obtain polylactic acid foam; the temperature range of the extrusion foaming system is: Zone 1: 90°C, Zone 2: 100°C ℃, zone 3: 160°C, zone 4: 190°C, zone 5: 190°C, zone 6: 180°C, zone 7: 150°C, and the die head temperature is 150°C. The expansion ratio of the polylactic acid foam material prepared in this example is 40 times, and the compressive strength is 0.05 MPa.

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PUM

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Abstract

The invention provides a polylactic acid foam material, which is obtained by foaming of a mixture. The mixture comprises by weight 100 parts of polylactic acid, 0.5-15 parts of water, 1-90 parts of a carrier, 0-20 parts of a plasticizer, 0-15 parts of a nucleating agent, 0-3 parts of an anti-hydrolysis agent and 0-5 parts of a chain extender. The polylactic acid foam material in the application uses water as a foaming agent rather than an organic foaming agent, so that the foaming of polylactic acid is safe and environment-friendly. The application uses polylactic acid as a matrix for the foam material to endow the foam material with good biodegradability, thus realizing biodegradation of the polylactic acid foam material. The application also provides a reparation method of the polylactic acid foam material.

Description

technical field [0001] The invention relates to the technical field of foam materials, in particular to a polylactic acid foam material and a preparation method thereof. Background technique [0002] Foam plastic is a new type of material, which uses plastic as the basic component and contains a lot of air bubbles, so foam plastic can also be a composite material filled with gas. Due to the valuable properties of foamed plastics such as light weight, low thermal conductivity, good heat insulation performance, ability to absorb impact loads, excellent cushioning performance, good sound insulation performance, and high specific strength, it is widely used in household daily necessities, vehicles, insulating materials, packaging materials, etc. , electrical appliances, sports facilities, electronic products and chemical and textile industries are widely used. [0003] At present, most foaming materials, such as polystyrene foam, polyethylene foam and polypropylene foam, etc., ...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L1/02C08L33/26C08L3/02C08K13/02C08K5/12C08K3/22C08K5/29C08K3/34C08K5/11C08K3/26C08K5/1515C08K3/36C08K5/053C08J9/08B29C47/92B29C48/92
CPCB29C48/92B29C48/875B29C2948/92704B29C2948/92895
Inventor 韩常玉徐明智韩立晶边俊甲董丽松
Owner 天津佰盛环保科技有限公司
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