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Flame-retardant environment-friendly packaging film and preparation method thereof

A packaging film and environmental protection technology, applied in the field of flame retardant environmental protection packaging film and its preparation, can solve the problems of complex processing method, temperature sensitivity, poor heat resistance, etc., and achieves no influence on degradation effect, improved film toughness, and good compatibility. sexual effect

Pending Publication Date: 2022-05-03
安徽海铭塑业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The starch-based degradable plastics in the existing schemes mainly have the following defects: mechanical properties are still defective, heat resistance is poor, and repeated processing cannot be performed; the processing method is complicated, the processing temperature range is narrow, and it is extremely sensitive to temperature; water resistance is poor, which leads to more Poor weather resistance; and because of the many defects of traditional starch-based degradable plastics, its large-scale application is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of modified starch:

[0032] Step S11. Mix 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and xylene, then raise the temperature to 80°C, add the mixture dropwise, and reflux for 24 hours after the addition, and react Cool to room temperature after completion, and then concentrate under reduced pressure to remove the solvent to obtain a modifier; the mixed solution is 2-octenylsuccinic anhydride and tetrahydrofuran mixed according to 1g:5mL, 9,10-dihydro-9-oxa- The dosage ratio of 10-phosphaphenanthrene-10-oxide and the mixed solution is 1g: 5mL;

[0033] Step S12, under the condition of nitrogen protection, mix starch and pyridine, heat and reflux for 4 hours, cool down to about 75°C, add modifier and dimethyl sulfoxide after mixing, and add 4-dimethylaminopyridine, heat Reflux reaction for 24 hours. After the reaction, the temperature of the reaction solution was lowered to about 25° C., washed with absolute ethanol, filtered and dried to obtain modif...

Embodiment 2

[0035] Preparation aids:

[0036] Under the condition of nitrogen protection, mix citric acid, 1,10-decanediol and 2,5-di-tert-butylhydroquinone, stir at 165°C for 20min, then lower the temperature to 145°C and continue stirring for 1h , then lower the temperature to 50°C and add phytic acid, continue to stir for 30 minutes, then raise the temperature to 140°C, and continue to stir for 2 hours to obtain the auxiliary agent.

[0037] The amount of 2,5-di-tert-butylhydroquinone added is 3% of the molar weight of citric acid; the molar ratio of carboxyl in citric acid to hydroxyl in 1,10-decanediol is 1:2; The mass ratio of acid is 1:0.2.

Embodiment 3

[0039] Preparation aids:

[0040] Under the condition of nitrogen protection, mix citric acid, 1,10-decanediol and 2,5-di-tert-butylhydroquinone, stir at 165°C for 20min, then lower the temperature to 145°C and continue stirring for 1h , then lower the temperature to 50°C and add phytic acid, continue to stir for 30min, then raise the temperature to 150°C, continue to stir for 2h to obtain the additive.

[0041] The amount of 2,5-di-tert-butylhydroquinone added is 3% of the molar weight of citric acid; the molar ratio of carboxyl in citric acid to hydroxyl in 1,10-decanediol is 1:2; The mass ratio of acid is 1:0.3.

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Abstract

The invention relates to a flame-retardant environment-friendly packaging film and a preparation method thereof, and belongs to the technical field of environment-friendly plastics, the packaging film comprises the following raw materials by weight: 120 parts of a bio-based composite material, 0.1-0.2 part of a lubricant, 8-9 parts of an auxiliary agent, 7-9 parts of modified starch, 7-9 parts of a flame retardant, and 1-2 parts of a stabilizer; the preparation method comprises the following steps: mixing the bio-based composite material, the lubricant, the modified starch, the flame retardant and the stabilizer in parts by weight; and adding the mixed raw materials into a double-screw extruder, adding an auxiliary agent, extruding and granulating, discharging granules and drying to obtain a resin material, and carrying out blow molding on the obtained resin material to form the film. And by adding the self-made auxiliary agent, the toughness of the film is favorably improved, and the degradation effect is not influenced. Besides, the starch is modified through the modifier, the hydrophobicity is improved, the mixing effect of the flame retardant and the matrix can be improved through the modified starch, and improvement of the mechanical performance of the product is promoted.

Description

technical field [0001] The invention belongs to the technical field of environment-friendly plastics, and in particular relates to a flame-retardant and environment-friendly packaging film and a preparation method thereof. Background technique [0002] Plastics are widely used in chemical, food, pharmaceutical and other industries because of their advantages such as low density, high strength, corrosion resistance, non-toxicity, excellent dielectric properties, good chemical stability, corrosion resistance, low price, and easy molding and processing. , and with the development of the takeaway and express delivery industries, the extensive use of plastic packaging will generate a large amount of waste. Plastics are not easy to decompose or recycle, and pollute the soil, ocean and air, which will affect the ecological environment. Through landfill, incineration, etc. Disposal can also damage the environment. [0003] A variety of degradable plastics continue to appear. Under ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08L3/04C08K3/32C08K5/11C08K5/521C08J5/18
CPCC08J5/18C08J2367/02C08J2467/04C08J2403/04C08K2003/323C08K5/11C08K5/521
Inventor 张海侠张涛征义
Owner 安徽海铭塑业有限公司
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