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Biodegradable two-way stretching composite film and preparation method and application thereof

A biodegradable, biaxial stretching technology, applied in applications, biological packaging, other household appliances, etc., can solve problems such as the impact of material biodegradation performance, and achieve the effect of ensuring environmental protection characteristics, high haze, and high light transmittance

Pending Publication Date: 2021-10-15
厦门长塑实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The matte film was prepared by utilizing the incompatibility of polyolefin and polylactic acid, but the introduction of polyolefin will affect the biodegradability of the material

Method used

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  • Biodegradable two-way stretching composite film and preparation method and application thereof
  • Biodegradable two-way stretching composite film and preparation method and application thereof
  • Biodegradable two-way stretching composite film and preparation method and application thereof

Examples

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preparation example Construction

[0049] The invention provides a method for preparing a biodegradable biaxially stretched composite film, comprising the following steps:

[0050] Coextrusion obtains unstretched raw material film, and described raw material film comprises at least one first resin layer A, and described first resin layer A comprises following component:

[0051] Polylactic acid, biodegradable elastomer and functional masterbatch;

[0052] The biodegradable elastomer is selected from polybutylene adipate / terephthalate, polybutylene succinate, polybutylene adipate / succinate, carbon dioxide copolymer, polycaprolactone at least one of;

[0053] The raw film is biaxially stretched.

[0054] In some examples, seefigure 1 as shown, figure 1 Schematic diagram of the structure of some embodiments provided by the present invention, the biodegradable biaxially stretched composite film includes a three-layer structure, from top to bottom are the first resin layer A, the second resin layer B and the firs...

Embodiment 1

[0080] (1) Preparation of functional masterbatch Y:

[0081] In parts by weight, after mixing 3 parts of erucamide, 5 parts of silicon dioxide, 1 part of ethoxylated amine, 80 parts of polylactic acid and 11 parts of polybutylene succinate, the mixture is extruded by twin-screw The machine is extruded and granulated at 160-165°C for standby;

[0082] (2) Preparation of biodegradable biaxially oriented composite film:

[0083] refer to figure 1 , is a structural schematic diagram of a biodegradable biaxially stretched composite film disclosed in Example 1 of the present invention, including a three-layer structure arranged in sequence, wherein the first resin layer A, the second resin layer A, and the second resin layer are sequentially arranged from top to bottom. layer B and the first resin layer A;

[0084] In parts by weight, the components of the first resin layer A are 77 parts of polylactic acid, 20 parts of polyadipate / butylene terephthalate (PBAT), and 3 parts of fu...

Embodiment 2

[0095] (1) Preparation of functional masterbatch Y:

[0096] In parts by weight, after mixing 3 parts of erucamide, 5 parts of silicon dioxide, 1 part of ethoxylated amine, 80 parts of polylactic acid and 11 parts of polybutylene succinate, the mixture is extruded by twin-screw The machine is extruded and granulated at 160-165°C for standby;

[0097] (2) Preparation of biodegradable biaxially oriented composite film:

[0098] refer to figure 2 , is a structural schematic diagram of a biodegradable biaxially stretched composite film disclosed in Example 2 of the present invention, including a two-layer structure arranged in sequence, wherein the first resin layer A, the second resin layer A, and the second resin layer are sequentially arranged from top to bottom. Layer B;

[0099] In parts by weight, the components of the first resin layer A are 90 parts of polylactic acid, 8 parts of polybutylene succinate (PBS), and 2 parts of functional masterbatch Y;

[0100] In parts ...

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Abstract

The invention relates to the technical field of biodegradable films, in particular to a biodegradable two-way stretching composite film and a preparation method and application thereof. The composite film comprises at least one first resin layer, and the first resin layer comprises polylactic acid, biodegradable elastomer and functional master batch. The biodegradable elastomer is selected from at least one of poly(1,6-Hexanedioic acid / p-phthalic butyl di-Ester), poly(butylene succinate), poly (butylene adipate-co-butylene succinate), a carbon dioxide copolymer and polycaprolactone. The biodegradable two-way stretching composite film is formed by co-extrusion and two-way stretching. The biodegradable two-way stretching composite film has good effects of high light transmittance, high haze and low glossiness.

Description

technical field [0001] The invention relates to the technical field of biodegradable films, in particular to a biodegradable biaxially stretched composite film and its preparation method and application. Background technique [0002] While the use of plastics has brought convenience to humans, it has also caused many environmental problems. With the improvement of living standards, the world is seeking to solve the problem of plastic pollution. Fully biodegradable plastics have attracted people's attention due to their unique biodegradable characteristics. After degradation, they are completely converted into water, carbon dioxide, and biomass, which is harmless to the environment. Therefore, they can be used as an alternative to existing non-degradable plastics. [0003] Packaging is one of the fields with the largest amount of plastic application. With the deepening of the application of various biodegradable plastics in the packaging industry, there are diverse requiremen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C55/10B32B27/36B32B27/18B32B27/06B65D65/40B65D65/46
CPCB29C55/10B32B27/36B32B27/18B32B27/08B65D65/40B65D65/466B32B2250/244B32B2307/7163B32B2553/00Y02W90/10
Inventor 吴腾达贾露刘运锦陈曦郑伟
Owner 厦门长塑实业有限公司
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