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High-shrinkage biaxially-oriented polylactic acid film and preparation method thereof

A technology of biaxial stretching and polylactic acid, which is applied in chemical instruments and methods, flat products, and other household appliances, etc., can solve the problems that cannot be applied in the field of cigarette packaging, general performance of biaxially stretched polylactic acid, etc., and achieve mechanical properties Excellent, good gloss and flatness, effect of reducing pollution

Pending Publication Date: 2022-01-07
GETTEL GRP TONGCHENG PLASTIC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the film for cigarettes is generally BOPP film, and the performance of biaxially oriented polylactic acid (BOPLA) film is relatively general, and it cannot be applied in the field of cigarette packaging

Method used

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  • High-shrinkage biaxially-oriented polylactic acid film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A high-shrinkage biaxially oriented polylactic acid film, which sequentially includes a surface layer I, a core layer, and a surface layer II; the surface layer I and the surface layer II are made of the following raw materials in parts by mass: 97.5 parts of heat-sealing compound, 2.5 parts of anti-adhesive masterbatch, wherein , the heat-sealing material is polylactic acid resin I; the core layer is made of the following raw materials in parts by mass: 95.5 parts of polylactic acid resin II, 1.5 parts of antistatic masterbatch, and 3 parts of smooth masterbatch; among them, the antisticking masterbatch includes The following mass percentages of raw materials: polylactic acid resin II 97%, silicon dioxide 3%; antistatic masterbatch includes the following mass percentages of raw materials: polylactic acid resin II 97%, ethoxylated alkylamine 3%; smooth masterbatch The raw materials include the following mass percentages: polylactic acid resin II 99%, oleic acid amide 1%;...

Embodiment 2

[0039] A high-shrinkage biaxially oriented polylactic acid film, which sequentially includes a surface layer I, a core layer, and a surface layer II; the surface layer I and the surface layer II are made of the following raw materials in parts by mass: 97 parts of heat-sealing material, 3 parts of anti-adhesive masterbatch, wherein , the heat-sealing material is polylactic acid resin I; the core layer is made of the following raw materials in parts by mass: 93 parts of polylactic acid resin II, 3 parts of antistatic masterbatch, and 4 parts of smooth masterbatch; wherein, the antisticking masterbatch includes the following Raw materials in mass percentage: polylactic acid resin II 96%, silicon dioxide 4%; antistatic masterbatch includes the following raw materials in mass percentage: polylactic acid resin II 96%, ethoxylated alkylamine 4%; smooth masterbatch includes The raw materials in the following mass percentages: polylactic acid resin II 98.5%, oleic acid amide 1.5%; poly...

Embodiment 3

[0047] A high-shrinkage biaxially oriented polylactic acid film, which sequentially includes a surface layer I, a core layer, and a surface layer II; the surface layer I and the surface layer II are made of the following raw materials in parts by mass: 99 parts of heat-sealing compound, 1 part of anti-adhesive masterbatch, wherein , the heat-sealing material is polylactic acid resin I; the core layer is made of the following raw materials in parts by mass: 96 parts of polylactic acid resin II, 1 part of antistatic masterbatch, and 3 parts of smooth masterbatch; wherein, the anti-adhesive masterbatch includes the following Raw materials in mass percentage: polylactic acid resin II 98%, silicon dioxide 2%; antistatic masterbatch includes the following raw materials in mass percentage: polylactic acid resin II 98%, ethoxylated alkylamine 2%; smooth masterbatch includes The raw materials in the following mass percentages: polylactic acid resin II 99.5%, oleic acid amide 0.5%; polyl...

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Abstract

The invention discloses a high-shrinkage biaxially-oriented polylactic acid film which sequentially comprises a surface layer I, a core layer and a surface layer II, wherein the surface layer I and the surface layer II are prepared from the following raw materials in parts by mass: 97-99 parts of a heat sealing material and 1-3 parts of an anti-sticking master batch,and the heat sealing material is polylactic resin I; the core layer is prepared from the following raw materials in parts by mass: 93-96 parts of polylactic resin II, 1-3 parts of antistatic master batch and 3-4 parts of smooth master batch. The invention also discloses a preparation method of the polylactic acid film. The biaxially-oriented polylactic acid film disclosed by the invention not only can meet conventional performance requirements of haze, glossiness, mechanical strength and the like of a packaging film, but also has a relatively high shrinkage rate, and can be used as a cigarette packaging material instead of a BOPP film.

Description

technical field [0001] The invention relates to the field of film technology, in particular to a high-shrinkage biaxially stretched polylactic acid film and a preparation method thereof. Background technique [0002] As a biodegradable raw material, polylactic acid can replace the current non-degradable plastics and greatly reduce the environmental pollution caused by plastics. More and more industries and enterprises are exploring its use. Polylactic acid is formed by ring-opening polymerization of lactide, which is mainly obtained from fermentation and polycondensation of straw and sweet potatoes. At present, polylactic acid raw materials have been widely used in injection molding, blow molding, textile and other fields. [0003] Cigarette film is a common cigarette packaging material. For hard cigarette packs, there are not only certain requirements on conventional properties such as haze, gloss and mechanical strength of the packaging film, but also in order to maintai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/36B32B27/18B32B27/06B65D65/40B29C48/21B29C48/00B29L7/00
CPCB32B27/36B32B27/18B32B27/08B65D65/40B29C48/21B29C48/0018B32B2307/50B32B2307/7163B32B2553/00B29L2007/00Y02W90/10
Inventor 齐先锋方文彬尤圣隆方晨王兆中
Owner GETTEL GRP TONGCHENG PLASTIC IND
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