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Three-layer high-water-resistance degradable packing material and preparation method thereof

A technology for packaging materials and degradable materials, which is applied in the field of three-layer high-resistance water-degradable packaging materials and their preparation, and achieves the effects of simple and effective method, easy industrialization, and good biodegradability.

Inactive Publication Date: 2019-10-25
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because polylactic acid has good air permeability and oxygen permeability, it also has the property of isolating odors, so viruses and molds are easy to attach to the surface of biodegradable plastics

Method used

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  • Three-layer high-water-resistance degradable packing material and preparation method thereof
  • Three-layer high-water-resistance degradable packing material and preparation method thereof
  • Three-layer high-water-resistance degradable packing material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0035] The three-layer high-resistance water-degradable packaging material provided in this embodiment uses the biodegradable material polylactic acid film as the substrate, and a barrier-reinforced polypropylene film is provided on both sides of the polylactic acid film to form a polypropylene (PP) / Polylactic acid (PLA) / polypropylene (PP) composite film.

[0036] in:

[0037] The polylactic acid film has a number average molecular weight of 50,000 to 250,000 g / mol.

[0038] The thickness of the polylactic acid film was 30 μm.

[0039] The thickness of the polypropylene film was 1.5 μm.

[0040] The polypropylene film is two layers.

[0041] The preparation method of the three-layer high-resistance water-degradable packaging material is as follows:

[0042] (1) Polypropylene resin is plasticized by a screw machine extruder;

[0043] (2) Set the temperature and cast the polypropylene onto the polylactic acid film;

[0044] (3) Cool and dry the polylactic acid film aft...

Embodiment 2

[0050] The three-layer high-resistance water-degradable packaging material provided in this embodiment uses the biodegradable material polylactic acid film as the substrate, and a barrier-reinforced polypropylene film is provided on both sides of the polylactic acid film to form a polypropylene (PP) / Polylactic acid (PLA) / polypropylene (PP) composite film.

[0051] in:

[0052] The polylactic acid film has a number average molecular weight of 100,000 to 200,000 g / mol.

[0053] The thickness of the polylactic acid film was 50 μm.

[0054] The thickness of the polypropylene film was 2.0 μm.

[0055] The polypropylene film is a single layer.

[0056] The preparation method of the three-layer high-resistance water-degradable packaging material is as follows:

[0057] (1) Polypropylene resin is plasticized by a screw machine extruder;

[0058] (2) Set the temperature and cast the polypropylene onto the polylactic acid film;

[0059] (3) cooling and drying the cast polylactic...

Embodiment 3

[0065] The three-layer high-resistance water-degradable packaging material provided in this embodiment uses the biodegradable material polylactic acid film as the substrate, and a barrier-reinforced polypropylene film is provided on both sides of the polylactic acid film to form a polypropylene (PP) / Polylactic acid (PLA) / polypropylene (PP) composite film.

[0066] in:

[0067] The polylactic acid film has a number average molecular weight of 150,000 to 180,000 g / mol.

[0068] The thickness of the polylactic acid film was 90 μm.

[0069] The thickness of the polypropylene film was 2.5 μm.

[0070] The polypropylene film is a single layer.

[0071] The preparation method of the three-layer high-resistance water-degradable packaging material is as follows:

[0072] (1) Polypropylene resin is plasticized by a screw machine extruder;

[0073] (2) Set the temperature and cast the polypropylene onto the polylactic acid film;

[0074] (3) cooling and drying the cast polylact...

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Abstract

The invention discloses a three-layer high-water-resistance degradable packing material and a preparation method thereof. A biodegradable material, namely a polylactic acid film, is taken as a matrix,barrier reinforcing layers, namely polypropylene films, are arranged on the surfaces of the two sides of the polylactic acid film, and thus a polypropylene / polylactic acid / polypropylene (PP / PLA / PP)three-layer composite film is formed. The three-layer high-water-resistance degradable packing material takes biodegradable polylactic acid as the matrix; polypropylene is adopted to be casted on thepolylactic acid film to improve barrier performance (water resistance performance), a biodegradable high-barrier plastic film material prepared from the three-layer high-water-resistance degradable packing material is of a PP / PLA / PP structure and has the characteristics of high barrier performance, good biodegradability and the like; and the polypropylene is casted on the matrix polymer polylacticacid film through a casting method, the method is concise and effective, and industrialization is facilitated.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and in particular relates to a three-layer high-resistance water-degradable packaging material and a preparation method thereof. Background technique [0002] At present, in the fields of medicine, chemical industry, food, cosmetics and automobiles, packaging materials have gradually shifted from metal materials and glass materials to barrier polymer materials. Because polymer materials are more transparent, lighter, and more designable than metal materials, they are more in line with today's requirements for packaging barrier materials, so they are more favored by the packaging industry. In addition, polymer materials are easy to process, low in cost, can be produced in large quantities, and are widely used. However, due to some structural characteristics of polymer materials, the barrier capacity of some polymer materials cannot meet the high barrier requirements of some packaging ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/36B32B27/32B32B27/08B29C41/30B29C41/32B29C41/52
CPCB29C41/30B29C41/32B29C41/52B32B27/08B32B27/32B32B27/36B32B2250/03B32B2250/246B32B2307/7163B32B2307/7265
Inventor 肖乃玉孟跃中王拴紧肖敏
Owner SUN YAT SEN UNIV
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