A kind of degradable food packaging material and preparation method thereof

A technology for food packaging and composite fillers, applied in the field of food packaging materials, can solve the problems of difficult biodegradation and low mechanical strength of food packaging materials, and achieve the effects of solving low mechanical strength, strengthening mechanical properties, and solving difficult degradation.

Active Publication Date: 2021-11-30
WUXI KEYONE HOUSEWARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a degradable food packaging material to solve the problems of difficult biodegradation and low mechanical strength of existing food packaging materials

Method used

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  • A kind of degradable food packaging material and preparation method thereof
  • A kind of degradable food packaging material and preparation method thereof
  • A kind of degradable food packaging material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: This embodiment provides a food packaging material, which is prepared according to the method for preparing food packaging materials, and the specific steps are as follows:

[0025] (1) Weigh 55 parts of polylactic acid, 45 parts of polyvinyl alcohol, 15 parts of maleic anhydride grafted compatibilizer, 5 parts of lubricant, 20 parts of composite filler and 3 parts of nano-titanium dioxide by weight and add them to the batching container , wherein the composite filler is sodium carboxymethyl cellulose, and the lubricant is acetylated monoglyceride fatty acid ester. Stir evenly at 80°C to 90°C. During the preparation of material Ⅰ, the stirring speed is 300r / min, and then Cool to below 80°C to obtain preliminary mixed material I;

[0026] (2) Put material I into a twin-screw extruder, melt, extrude strands, cool, and pelletize. The temperature in the twin-screw extruder is 120°C to 125°C to obtain pellets II for manufacturing food packaging materials .

...

Embodiment 2

[0028] Embodiment 2: This embodiment provides a food packaging material, which is prepared according to the method for preparing food packaging materials, and the specific steps are as follows:

[0029] (1) Weigh 58 parts of polylactic acid, 50 parts of polyvinyl alcohol, 18 parts of maleic anhydride grafted compatibilizer, 6 parts of lubricant, 24 parts of composite filler and 4 parts of nano-titanium dioxide by weight and add them to the batching container , wherein the composite filler is sodium carboxymethylcellulose and chitosan with a mass ratio of 1:1, the lubricant is acetylated monoglyceride fatty acid ester and polyethylene wax with a mass ratio of 1:2; at 80°C Stir evenly at ~100°C. During the preparation of material I, the stirring speed is 350r / min, and then cool to below 80°C to obtain the preliminary mixed material I;

[0030] (2) Put material I into a twin-screw extruder, melt, extrude strands, cool, and pelletize. The temperature in the twin-screw extruder is ...

Embodiment 3

[0032] Embodiment 3: This embodiment provides a food packaging material, which is prepared according to the above-mentioned method for preparing food packaging materials, and the specific steps are as follows:

[0033] (1) Weigh 60 parts of polylactic acid, 52 parts of polyvinyl alcohol, 20 parts of maleic anhydride grafted compatibilizer, 6 parts of lubricant, 25 parts of composite filler and 4 parts of nano-titanium dioxide by weight and add them to the batching container , wherein the composite filler is sodium carboxymethylcellulose, chitosan, calcium stearate and its mass ratio is 2:2:2, and the lubricant is acetylated monoglyceride fatty acid ester and polyethylene wax and its mass ratio is 1:3; Stir evenly under the condition of 90℃~115℃. During the preparation of material Ⅰ, the stirring speed is 380r / min, and then cool to below 80℃ to obtain the preliminary mixed material Ⅰ;

[0034] (2) Add material I into a twin-screw extruder, melt, extrude strands, cool, and pelle...

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PUM

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Abstract

The invention discloses a degradable food packaging material, which is made of the following materials in parts by mass: 55-65 parts of polylactic acid, 45-55 parts of polyvinyl alcohol, 15-25 parts of maleic anhydride grafted compatibilizer, 3-6 parts of nano-titanium dioxide, said nano-titanium dioxide is anatase crystal form, 20-30 parts of composite filler, 5-8 parts of lubricant, said composite filler is sodium carboxymethyl cellulose, chitosan, stearin One or more in calcium acid calcium, described maleic anhydride graft compatibilizer is polylactic acid-g-polyvinyl alcohol graft copolymer, and described lubricant is acetylated monoglyceride fatty acid ester, polyethylene wax , one or more of polyamide waxes. The main components of the degradable food packaging material of the present invention, polylactic acid and polyvinyl alcohol, can be degraded in the environment, and the prepared graft copolymer also has good degradability, which solves the problem that the existing food packaging materials are difficult to degrade The problem.

Description

【Technical field】 [0001] The invention relates to the technical field of food packaging materials, in particular to a degradable food packaging material and a preparation method thereof. 【Background technique】 [0002] With the development of society, in daily life, many non-ready-to-eat products need to use packaging materials for preservation. Specifically, various types of food-grade plastics can be used, such as polyvinylidene chloride, PP, ultra-high molecular weight polyethylene, PET material and so on. However, the existing food packaging materials are not easy to degrade when placed in the environment after use, and the resulting environmental problems such as "white pollution" have become a major hidden danger that threatens the human living environment. [0003] Moreover, the existing degradable food packaging materials have low mechanical strength and are easily damaged, which is not conducive to the quality and safety of food during transportation and storage. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L29/04C08L51/08C08L1/28C08K5/101C08K3/22C08L5/08C08L23/06C08K5/098C08L77/00C08J5/18
CPCC08L67/04C08L29/04C08J5/18C08K2003/2241C08K2201/011C08L2205/035C08L2203/16C08L2201/06C08J2367/04C08J2329/04C08J2467/04C08J2429/04C08J2451/08C08J2401/28C08J2423/06C08J2477/00C08L51/08C08L1/286C08K5/101C08K3/22C08L5/08C08L23/06C08K5/098C08L77/00
Inventor 廖集汉
Owner WUXI KEYONE HOUSEWARE
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