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A kind of degradable food packaging film material and its preparation process

A food packaging film and raw material technology, applied in the sustainable packaging industry, sustainable manufacturing/processing, packaging, etc., can solve the problems of poor mechanical properties and poor compatibility of biomass film materials, and achieve improved compatibility , uniform mechanical properties, and the effect of improving melt strength

Active Publication Date: 2021-06-29
浙江多赢新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a polylactic acid composite material with excellent strength and toughness in order to overcome the defects of poor compatibility and poor mechanical properties of biomass membrane materials

Method used

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  • A kind of degradable food packaging film material and its preparation process
  • A kind of degradable food packaging film material and its preparation process
  • A kind of degradable food packaging film material and its preparation process

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preparation example Construction

[0063] The preparation process of the degradable food packaging film material is as follows: the raw materials are put into a screw extruder to extrude and pelletize, and then put into a biaxial stretch film blowing machine to prepare a film;

[0064] The screw extruder is provided with two feed ports, the first feed port is located at the beginning of the feed section of the extrusion screw, and the second feed port is located at 5 / 6 of the feed section of the extrusion screw.

[0065] (1) The processing characteristics of the extrusion section are as follows:

[0066] 1) All raw materials are divided into two parts, which are fed in different feed ports;

[0067] The first part of the materials includes:

[0068] 75% polybutylene succinate, 65% carboxy-terminated polylactic acid, 72% carboxymethyl chitosan, 52% melt enhancer, all six-arm polyethylene glycol carboxyl , Antioxidant;

[0069] The material is fully dried and mixed evenly at high speed before feeding;

[0070...

specific Embodiment 2

[0081] A degradable food packaging film material and its preparation process, the material is polybutylene succinate, lactic acid, carboxyl-terminated polylactic acid, six-arm polyethylene glycol carboxyl, carboxymethyl chitosan, eight-arm maleic anhydride Cage polysilsesquioxane, melt reinforcing agent, antioxidant, and stannous chloride are prepared as raw materials through reactive extrusion and then biaxially stretched to form a film. The ratio of each raw material component by mass is as follows:

[0082] Polybutylene succinate 15 parts

[0083] Lactic acid 25.5 parts

[0084] Carboxy-terminated polylactic acid 8.5 parts

[0085] Six-arm polyethylene glycol carboxyl 4.5 parts

[0086] Carboxymethyl chitosan 10.5 parts

[0087] Eight-arm maleic anhydride cage polysilsesquioxane 2.2 parts

[0088] Tin protochloride 0.1 parts

[0089] Melt enhancer 4.5 parts

[0090] Antioxidant 1.2 parts.

[0091] The molecular weight of the polybutylene succinate is between 200000-2...

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Abstract

A degradable food packaging film material and a preparation process thereof. The invention relates to a high-strength and tough fully degradable bio-polyester composite material and a preparation process, which is characterized in that aliphatic polycarbonate, lactic acid, poly(β-hydroxybutyrate-co-β-hydroxyvalerate), four-arm Polyethylene glycol propionaldehyde, chitosan and eight-arm polyethylene glycol cage polysilsesquioxane, stannous octoate, stannous chloride, melt enhancer and antioxidant as raw materials by reactive extrusion prepared. The biomass composite material has a simple processing technology, has excellent strength and toughness, can achieve full degradation, and can be applied to packaging and industrial fields that require high strength and toughness.

Description

technical field [0001] The invention relates to a method for preparing a food packaging film, in particular to a method for preparing a fully degradable film material with good mechanical properties and no harm to food. Background technique [0002] Although plastic materials have excellent performance and wide applicability, they are derived from petroleum products and cannot be degraded. In today's resource crisis and environmental pollution are becoming more and more serious, looking for excellent performance and renewable alternative materials has become the current research field in the field of materials. top priority. [0003] Among the current degradable materials, various biodegradable materials are used in plastic replacement. Such as starch, polylactic acid, biopolyester, etc. Starch has been deeply studied due to its cheap price and wide range of sources, and a variety of daily and industrial products have been prepared through modification and compounding, suc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L67/04C08L71/02C08L5/08C08L83/08C08L23/08C08G63/08C08J5/18B65D65/46
CPCB65D65/466C08G63/08C08J5/18C08J2367/04C08J2405/08C08J2423/08C08J2467/02C08J2467/04C08J2471/02C08J2483/08Y02W90/10
Inventor 陈一
Owner 浙江多赢新材料科技有限公司
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