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Degradable packaging material, packaging film bag and preparation method

A packaging material and packaging film technology, applied in the field of highly transparent and degradable packaging materials, can solve the problem of not having the function of keeping fruits and vegetables fresh

Active Publication Date: 2021-07-30
绍兴仁宇生物材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent uses 4 kinds of resin substrates, the processing performance and mechanical properties of the material are improved, but because PPC is used as the substrate, and its content is greater than 40%, this material does not have the function of keeping fruits and vegetables fresh

Method used

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  • Degradable packaging material, packaging film bag and preparation method
  • Degradable packaging material, packaging film bag and preparation method
  • Degradable packaging material, packaging film bag and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Step 1, preparation of modified materials

[0030] Weigh 6kg of PLA, 4kg of PBAT, 0.01kg of ADR chain extender, and 0.03kg of erucamide, add them into a mixer for thorough mixing, and then add them into a twin-screw extruder to extrude at a temperature of 230°C for granulation.

[0031] Step 2, transparent film preparation

[0032] After the granulation is completed, the modified material prepared in step 1 is dried at 70° C. for 6 hours, and put into an extruder by blowing film to obtain a transparent film with a thickness of 8 um.

Embodiment 2

[0034] Step 1, preparation of modified materials

[0035] Weigh 6kg of PLA, 3kg of PBAT, 1kg of PBS, 0.01kg of ADR chain extender, and 0.03kg of erucamide, add them into a mixer for thorough mixing, and then add them into a twin-screw extruder to extrude at 230°C for granulation.

[0036] Step 2, transparent film preparation

[0037] After the granulation is completed, the modified material prepared in step 1 is dried at 70° C. for 6 hours, and put into an extruder by blowing film to obtain a transparent film with a thickness of 8 um.

Embodiment 3

[0039] Step 1, preparation of modified materials

[0040] Weigh 6kg of PLA, 3kg of PBAT, 1kg of PBS, 0.5kg of PPCU, 0.01kg of ADR chain extender, and 0.03kg of erucamide, add them into a mixer for thorough mixing, then add them into a twin-screw extruder to extrude at a temperature of 230°C out of granulation.

[0041] Step 2, transparent film preparation

[0042] After the granulation is completed, the modified material prepared in step 1 is dried at 70° C. for 6 hours, and put into an extruder by blowing film to obtain a transparent film with a thickness of 8 um.

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Abstract

The invention discloses a degradable packaging material, and belongs to the field of packaging materials. The degradable packaging material comprises polylactic acid (PLA), poly(butylene adipate-co-terephthalate) (PBAT), poly(butylene succinate) (PBS), carbon dioxide-based thermoplastic polyurethane (PPCU), an ADR chain extender and an additive. The degradable packaging material is a quaternary blending system formed by PLA serving as a main material, PBAT, PBS and PPCU, ADR is taken as a chain extender, and a film high in transparency and excellent in mechanical property is prepared through a cold crystallization mode.

Description

technical field [0001] The invention relates to the field of packaging materials, and more specifically relates to a highly transparent and degradable packaging material for keeping fruits and vegetables fresh, a film bag, and a preparation method for the film bag. Background technique [0002] my country is a large fruit and vegetable industry country, but in the field of fruit and vegetable preservation, the annual fruit and vegetable rot rate in our country is 25-30%, the annual loss of fruits and vegetables exceeds hundreds of millions of tons, and the economic loss exceeds 100 billion yuan. At present, the main materials for packaging fruits and vegetables are resin materials such as PP and PE, which hardly have the function of keeping fresh and cannot be biodegraded. The huge amount of packaging has caused serious environmental pollution. Fresh-keeping packaging of fruits and vegetables can prolong the shelf life of fruits and vegetables, which will greatly reduce the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L75/04C08J5/18
CPCC08J5/18C08J2367/04C08J2467/02C08J2475/04Y02W90/10
Inventor 赵若飞黄伟
Owner 绍兴仁宇生物材料有限公司