Preparation methods of biodegradable yoghourt-cup material and product

A biodegradable, yogurt cup technology, applied in the field of polymer materials, can solve problems such as poor barrier properties of polylactic acid, achieve good mechanical strength, reduce product costs, and expand application fields.

Inactive Publication Date: 2018-06-22
JILIN COFCO BIOCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a preparation method of a biodegradable yogurt cup material and products to expand the application range of polylactic acid and solve the problem of poor barrier property of polylactic acid as food packaging

Method used

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  • Preparation methods of biodegradable yoghourt-cup material and product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 55 parts of polylactic acid, 35 parts of thermoplastic hydrophobic starch, 10 parts of polybutylene adipate-terephthalate, 0.7 parts of nucleating agent superfine talc powder, 1 part of chain extender, 0.3 parts of crosslinking agent, phase 0.15 parts of container;

[0035] The twin-screw extruder is granulated, and after drying, it is extruded into a sheet by a sheet machine, and the finished product of the yogurt cup is obtained by blistering of the plastic machine; the melting and blending temperature of the twin-screw extruder is 170-190°C, and The rotation speed is 200r / min, the heating temperature of the blister machine is 60°C, the vacuuming time is 14s, the cooling time is 16s, and the heating time is 17s.

Embodiment 2

[0037] 65 parts of polylactic acid, 25 parts of thermoplastic hydrophobic starch, 7.5 parts of polybutylene adipate-terephthalate, nucleating agent nano-SiO 2 0.5 parts, 0.75 parts of chain extender, 0.2 parts of crosslinking agent, 0.12 parts of compatibilizer;

[0038] The twin-screw extruder granulates, and after drying, it is extruded into a sheet by a sheet machine, and the finished product of the yogurt cup is obtained by absorbing the plastic machine. The rotation speed is 200r / min, the heating temperature of the blister machine is 67.5°C, the vacuuming time is 14.5s, the cooling time is 16.5s, and the heating time is 19.5s.

Embodiment 3

[0040] 75 parts of polylactic acid, 15 parts of thermoplastic hydrophobic starch, 5 parts of polybutylene adipate-terephthalate, 0.3 part of nucleating agent trimesic acid triamide, 0.5 part of chain extender, 0.1 part of crosslinking agent , 0.1 part of compatibilizer;

[0041] The twin-screw extruder granulates, and after drying, it is extruded into a sheet by a sheet machine, and the finished product of the yogurt cup is obtained by blistering of the plastic machine. The rotation speed is 200r / min, the heating temperature of the blister machine is 75°C, the vacuuming time is 15s, the cooling time is 17s, and the heating time is 22s.

[0042] The effect of the thermoplastic hydrophobic base starch of the present invention is described below through an experimental example.

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PUM

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Abstract

The invention provides preparation methods of a biodegradable yoghourt-cup material and a product, and belongs to the field of polymer materials. The biodegradable yoghourt-cup material is prepared from the following components: 55-75 parts of polylactic acid, 15-35 parts of thermoplastic hydrophobic starch, 5-10 parts of poly(butyleneadipate-co-terephthalate), 0.3-0.7 part of a nucleating agent,0.5-1 part of a chain extender, 0.1-0.3 part of a cross-linking agent and 0.1-0.15 part of a compatilizer. The material provided by the invention has the advantages that the polylactic acid are blended with the thermoplastic hydrophobic starch and the poly(butyleneadipate-co-terephthalate) for modification, and then the auxiliary agents such as the nucleating agent, the chain extender, the cross-linking agent, the compatilizer and the like are added, so that the defects of low barrier property and high brittleness of the polylactic acid are overcome, good mechanical strength and good flexibility are achieved, the product cost is reduced, the application field of a polylactic acid material is expanded, and the pollution to the environment is greatly reduced compared with the pollution of the petroleum-based plastic.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a preparation method of biodegradable yoghurt cup materials and products. Background technique [0002] Polylactic acid (PLA) is a biodegradable polymer synthesized by chemical methods using plant resources as raw materials. It can be completely degraded into carbon dioxide and water under natural environment or composting conditions to realize the recycling of resources. However, due to the brittleness of PLA, its development and practical application have been seriously hindered; the addition of hydrophobic base starch will not affect its degradability, but also can reduce the cost. Polybutylene adipate-terephthalate (PBAT) is a biodegradable aromatic polyester synthesized from adipic acid, terephthalic acid and butanediol. It has high toughness and can be improved after adding The toughness of the material. [0003] The Chinese invention patent with publication n...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L3/02C08L67/02C08K3/36C08K5/098C08K3/34C08K5/20
CPCC08K2201/011C08K2201/018C08L67/04C08L2201/06C08L2205/02C08L2205/03C08L3/02C08L67/02C08K3/34C08K5/098C08K3/36C08K5/20
Inventor 佟毅李义吴延东张会良颜祥禹赵国兴安鸿雁刘志刚唐宏阁曹雪董丽松
Owner JILIN COFCO BIOCHEM
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