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A kind of environment-friendly degradable packaging composite film and preparation method thereof

A composite film, environmentally friendly technology, applied in the field of packaging materials, can solve the problems of inability to take into account cost and film degradation effect, mechanical properties, polymer crystallinity decline, composite film quality reduction and other problems, achieve good low temperature toughness, improve mechanical properties. and heat resistance, the effect of improving interfacial affinity

Active Publication Date: 2021-05-14
瑞力恒生态科技(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research found that there are the following problems: 1. The heat resistance of the sandwich layer is poor. In the process of multi-layer co-extrusion casting, polylactic acid is easy to melt with starch, and it is easy to produce starch in a high temperature environment above 150°C. Denaturation and fragmentation into dextrin, resulting in burnt smell, which greatly reduces the quality of the composite film; 2. During the preparation of conventional polyethylene and polyvinyl alcohol films, aromatic rings are introduced to improve the tensile strength and elongation at break of the polymer. However, as the aromatic ring content increases, the crystallinity of the polymer decreases, and the degradation performance first increases and then decreases, which cannot take into account the cost and the degradation effect and mechanical properties of the film.

Method used

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  • A kind of environment-friendly degradable packaging composite film and preparation method thereof
  • A kind of environment-friendly degradable packaging composite film and preparation method thereof
  • A kind of environment-friendly degradable packaging composite film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] An environment-friendly degradable packaging composite film in this embodiment includes the following raw materials in parts by weight: 145 parts of modified PBS resin, 53 parts of heat-resistant modified starch, 18 parts of Biofiller828 photooxidation-biodegradation accelerator, nano-volcanic ash 14 parts, 8 parts of calcium stearate, 7 parts of nano calcium carbonate powder;

[0038] Wherein, the modified PBS resin includes the following raw materials in parts by weight: 103 parts of PBS resin, 46 parts of sago starch, 9 parts of chlorinated palm oil methyl ester, 11 parts of maleic anhydride grafted ethylene-1-octene copolymer, 4 parts of water pearlescent sand, 1.6 parts of precipitated silica; wherein, the density of the PBS resin is 1.25g / cm 3 , the melting point is 112-116°C, the heat distortion temperature is 52°C, and the Vicat softening point is 82°C; the preparation method of the modified PBS resin comprises the following steps:

[0039] 1) High-speed mixing...

Embodiment 2

[0052] An environment-friendly degradable packaging composite film of this embodiment includes the following raw materials in parts by weight: 145 parts of modified PBS resin, 53 parts of heat-resistant modified starch, 19 parts of Biofiller828 photooxidation-biodegradation accelerator, nano-volcanic ash 15 parts, 10 parts of calcium stearate, 8 parts of nano calcium carbonate powder;

[0053] Wherein, the modified PBS resin includes the following raw materials in parts by weight: 115 parts of PBS resin, 46 parts of sago starch, 10 parts of chlorinated palm oil methyl ester, 13 parts of maleic anhydride grafted ethylene-1-octene copolymer, 5 parts of water pearlescent sand, 2.5 parts of precipitated silica; wherein, the density of the PBS resin is 1.25g / cm 3 , the melting point is 112-116°C, the heat distortion temperature is 52°C, and the Vicat softening point is 82°C; the preparation method of the modified PBS resin is the same as that of Example 1.

[0054] The preparation...

Embodiment 3

[0060] An environment-friendly degradable packaging composite film of this embodiment includes the following raw materials in parts by weight: 127 parts of modified PBS resin, 56 parts of heat-resistant modified starch, 20 parts of Biofiller828 photooxidation-biodegradation accelerator, nano-volcanic ash 16 parts, 10 parts of calcium stearate, 8 parts of nano calcium carbonate powder;

[0061] Wherein, the modified PBS resin includes the following raw materials in parts by weight: 113 parts of PBS resin, 42 parts of sago starch, 10 parts of chlorinated palm oil methyl ester, 13 parts of maleic anhydride grafted ethylene-1-octene copolymer, 6 parts of water pearlescent sand, 2.5 parts of precipitated silica; wherein, the density of the PBS resin is 1.25g / cm 3 , the melting point is 112-116°C, the heat distortion temperature is 52°C, and the Vicat softening point is 82°C; the preparation method of the modified PBS resin is the same as that of Example 1.

[0062] The preparation...

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Abstract

The invention discloses an environment-friendly degradable packaging composite film and a preparation method thereof. The composite film comprises the following raw materials in parts by weight: 120-150 parts of modified PBS resin, 45-60 parts of heat-resistant modified starch, and a degradation accelerator 15-22 parts, 12-16 parts of nano-volcanic ash, 5-11 parts of calcium stearate, 3-9 parts of nano-calcium carbonate powder, prepared by crushing and mixing, and multi-layer co-extrusion casting. The present invention modifies the PBS resin by selecting sago starch, environment-friendly plasticizer and functional filler to improve the mechanical properties and heat resistance of the PBS resin; Agent, lubricant calcium stearate, and nano fillers are pulverized and mixed, and multi-layer co-extrusion casting stretches to obtain the composite film. It has good tensile strength, elongation at break, heat resistance, flame retardancy and light ‑Bio-biodegradable properties.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to an environment-friendly degradable packaging composite film and a preparation method thereof. Background technique [0002] Composite film refers to a film compounded by a variety of different polymers by co-extrusion blow molding, co-extrusion casting or co-extrusion stretching. As a plastic packaging material, this film is widely used in the fields of food, processed meat products, daily necessities, cosmetics, chemical products, and pesticides, and can realize sealed flexible packaging of products and various packaging functions such as inflating, vacuuming, and thermoforming. Excellent properties such as high moisture resistance, oxygen resistance, oil resistance, and fragrance retention in complex environments. [0003] With the wide application of polyethylene film in assembly and agricultural film, a large amount of plastic waste is difficult to degrade in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L3/02C08L51/06C08L67/04C08K13/02C08K5/101C08K3/36C08K5/098C08K3/26C08K5/103C08J5/18C08G63/08C08G63/87B29C48/00B29C48/92B29C69/00B29B7/28
CPCB29B7/28C08G63/08C08G63/823C08J5/18C08J2367/02C08J2403/02C08J2451/06C08J2467/04C08K3/36C08K5/098C08K5/101C08K5/103C08K13/02C08K2003/265C08K2201/011
Inventor 不公告发明人
Owner 瑞力恒生态科技(深圳)有限公司
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