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Preparation method of uniform-cell and high-buffer polylactic acid foamed material

A technology of polylactic acid foaming and polylactic acid, which is applied in the field of preparation of polylactic acid foaming materials, can solve problems such as poor cushioning performance, uneven cells, and low foaming ratio

Inactive Publication Date: 2016-04-06
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of the existing polylactic acid foaming materials such as uneven cells, low foaming ratio and poor cushioning performance, and provide a polylactic acid with good foaming ratio and uniform cells with excellent buffering properties. Preparation method of foam material

Method used

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  • Preparation method of uniform-cell and high-buffer polylactic acid foamed material

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specific Embodiment 1

[0025] A method for preparing a polylactic acid foam material with uniform cells and high buffering capacity. The foam material is processed from main materials and auxiliary materials. The main materials include polylactic acid, EVA elastomer, cellulose acetate propionate, esterified modified nano Cellulose, polylactic acid grafted maleic anhydride, gelatin, and auxiliary materials antioxidant, plasticizer, anti-ultraviolet agent. Calculated by the mass of polylactic acid as 100 parts, in the main material, EVA elastomer is 26 parts, cellulose acetate propionate is 12 parts, acetate-modified nanocellulose is 4 parts, polylactic acid grafted maleic anhydride is 6 parts 4 parts of gelatin. Among the auxiliary materials, the antioxidant, the plasticizer, and the anti-ultraviolet agent are all 3 parts.

[0026] The polylactic acid is poly-L-lactic acid, and its relative molecular weight is 140,000-200,000.

[0027] The acetate nanocellulose is diacetate nanocellulose, the degre...

specific Embodiment 2

[0040] The invention discloses a preparation method of polylactic acid foam material with uniform cells and high buffering capacity. The foam material is processed from main materials and auxiliary materials. The main materials include polylactic acid, EVA elastomer, cellulose acetate propionate, esterified modified nanocellulose, polylactic acid grafted maleic anhydride, gelatin, and auxiliary materials anti Oxygen, plasticizer, anti-ultraviolet agent. Calculated on the basis of 100 parts of polylactic acid, in the main ingredients, EVA elastomer is 30 parts, cellulose acetate propionate is 12 parts, acetate modified nanocellulose is 5.5 parts, and polylactic acid grafted maleic anhydride is 5.5 parts. part, 4.5 parts of gelatin. Among the auxiliary materials, antioxidant, plasticizer, and anti-ultraviolet agent are all 2.5 parts.

[0041] The polylactic acid is poly D-lactic acid, and its relative molecular weight is 160,000-250,000.

[0042] The acetate nanocellulose is ...

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Abstract

The invention relates to a preparation method of a uniform-cell and high-buffer polylactic acid foamed material. The foamed material comprises a main material and an auxiliary material, and the main material comprises polylactic acid, EVA elastomer, cellulose acetate propionate, esterification modified nano-cellulose, polylactic acid grafted maleic anhydride and gelatin; and the auxiliary material comprises an antioxidant, a plasticiser and an ultraviolet resisting agent. The main material comprises, by mass, 100 parts of polylactic acid, 20-35 parts of the EVA elastomer, 8-15 parts of cellulose acetate propionate, 3-6 parts of esterification modified nano-cellulose, 4-8 parts of polylactic acid grafted maleic anhydride and 3-6 parts of gelatin. The auxiliary material comprises 2-4 parts of the antioxidant, 2-4 parts of the plasticiser and 2-4 parts of the ultraviolet resisting agent. The foamed material is prepared through a premixing, autoclave foaming and liquid nitrogen cooling technology, has the advantages of effective guaranteeing of cell uniformity, high foaming rate and good buffering performance, and can be used in the field of packaging buffering.

Description

technical field [0001] The invention relates to a preparation method of a polylactic acid foaming material, in particular to a preparation method of a polylactic acid foaming material with uniform cell structure, high foaming ratio and high cushioning properties. Background technique [0002] Although plastic materials have excellent performance and wide applicability, they are derived from petroleum products and cannot be degraded. In today's resource crisis and environmental pollution are becoming more and more serious, looking for excellent performance and renewable alternative materials has become the current research field in the field of materials. top priority. In the field of cushioning packaging, polystyrene foam (EPS) accounts for the majority of cushioning packaging materials due to its excellent molding ability, expansion ratio and cushioning performance. Although polyethylene foam (EPE) has average cushioning properties, it is low in cost and is widely used i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L23/08C08L1/14C08L1/08C08L51/08C08L89/00C08J9/12
Inventor 陈一
Owner HUNAN UNIV OF TECH
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