Fully-degradable antibacterial food packaging film and preparation method thereof

A food packaging film, fully degradable technology, applied in the field of food packaging and food packaging materials, can solve the problems of increased production costs, complicated preparation methods, difficult commercial production, etc., and achieve the effects of saving costs, ensuring antibacterial activity, and optimizing formulas

Active Publication Date: 2021-08-10
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent application with application number 201410385522.8 adopts the extrusion blow molding method to prepare a starch / PBAT composite film with antibacterial effect, but the invention first extrudes thermoplastic starch containing antibacterial agent, and then combines it with polyester material and coupling agent Blending extrusion, this two-step extrusion granulation method will cause the antibacterial agent to be heated many times, which is not conducive to its antibacterial performance. At the same time, this processing method leads to high energy consumption, increases production costs, and limits the promotion of the produced film.
[0006] In summary, although some research has been done on the preparation technology of fully degradable food packaging films, there are many shortcomings such as complex preparation methods and low efficiency (difficult to commercial production), high production energy consumption, and high product costs.

Method used

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  • Fully-degradable antibacterial food packaging film and preparation method thereof
  • Fully-degradable antibacterial food packaging film and preparation method thereof
  • Fully-degradable antibacterial food packaging film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The preparation process of the fully degradable antibacterial food packaging film of the present embodiment is as follows:

[0045] (1) Hydroxypropyl cross-linked starch (4kg), polybutylene terephthalate / adipate (16kg), citric acid (0.2kg), glyceryl monostearate (0.3kg), organic Modified montmorillonite (2kg) and ε-polylysine hydrochloride (0.8kg) were mixed in a high-speed mixer. During the mixing process, glycerin (1.6kg) was slowly added to the high-speed mixer through the auxiliary valve. In the machine, the mixing time is 6 minutes, and after mixing, it is placed at room temperature for 24 hours;

[0046] (2) Use a twin-screw extruder to extrude the mixture obtained in step (1) in one step. After the strip is air-cooled by the conveyor belt, it is made into uniform-sized blown film pellets by a pelletizer. The temperature in each zone of the extruder is The order is 105°C, 120°C, 125°C, 135°C, 125°C, head temperature 110°C, screw speed 150rpm;

[0047] (3) The bl...

Embodiment 2

[0051] The preparation method of the fully degradable antibacterial food packaging film of the present embodiment comprises the steps:

[0052] (1) Add ε-polylysine hydrochloride (0.6kg) into an appropriate amount of water, stir in a water bath at 40°C until dissolved, and obtain a clear liquid;

[0053] (2) Hydroxypropyl starch (8kg), polybutylene terephthalate / adipate (12kg), citric acid (0.4kg), stearic acid (0.6kg), organically modified montmorillonite (1.8kg) is placed in the high-speed mixer and mixed, and the ε-polylysine hydrochloride aqueous solution and glycerin (3kg) obtained in step (1) are slowly added to the high-speed mixer through the auxiliary valve during the mixing process. , the total mixing time is 6min, and then the resulting mixture is placed at room temperature for 24h;

[0054] (3) Use a twin-screw extruder to extrude the mixed material obtained in step (2) in one step. After the material strip is air-cooled by the conveyor belt, it is made into unifo...

Embodiment 3

[0059] Use the following steps to prepare the fully degradable antibacterial food packaging film described in this embodiment:

[0060] (1) Hydroxypropyl cross-linked starch (10kg), polybutylene terephthalate / adipate (9kg), polybutylene succinate (1kg), maleic anhydride (0.3kg) , benzoyl peroxide (0.03kg), stearic acid (0.6kg), organically modified montmorillonite (1kg), ε-polylysine hydrochloride (1kg) are placed in a high-speed mixer, and the mixing process Slowly add glycerin (3.5kg) into the high-speed mixer through the additive valve in the middle, the total mixing time is 6min, and then stand at room temperature for 24h;

[0061] (2) Use a twin-screw extruder to extrude the mixture obtained in step (1) in one step. After the strip is air-cooled by the conveyor belt, it is made into uniform-sized blown film pellets by a pelletizer. The temperature in each zone of the extruder is The order is 105°C, 120°C, 125°C, 135°C, 125°C, head temperature 110°C, screw speed 150rpm; ...

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Abstract

The invention belongs to the field of food packaging, and particularly relates to a full-degradable antibacterial food packaging film and a preparation method thereof. The packaging film is prepared from 20-50 parts of starch, 50-80 parts of biodegradable polyester, 5-40 parts of plasticizer, 1-10 parts of compatibilizer, 2-20 parts of organic modified montmorillonite, 1-5 parts of lubricant and 0.5-12 parts of natural antibacterial agent. The food packaging film is prepared through one-step extrusion granulation, and is obtained by adopting an extrusion blow molding film making process. The full-degradable antibacterial food packaging film produced by the invention has excellent antibacterial property, mechanical property and barrier property, the used antibacterial agent is high in safety, the adopted film preparation mode is continuous and efficient, and the full-degradable antibacterial food packaging film is suitable for commercial production and can be applied to various food packaging scenes.

Description

technical field [0001] The invention belongs to the field of food packaging, in particular relates to a fully degradable antibacterial food packaging film and a preparation method thereof, and is particularly applicable to the field of food packaging materials. Background technique [0002] The extensive use of traditional plastics has brought serious environmental pollution problems. In addition, traditional plastic products are one of the most commonly used food packaging materials, and the food safety hazards brought by direct contact with food have also been concerned by the society. Although the "Plastic Restriction Order" and "Plastic Ban Order" have been implemented successively in China, and strict quality standards have been established for plastic packaging for food contact, to solve these problems from the source, there is still a need for effective alternatives to traditional plastic products. Cheap and high-quality new biodegradable plastic products. Meanwhile...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L3/08C08L77/04C08K5/092C08K5/103C08K3/34C08K9/04C08K5/09C08J5/18
CPCC08J5/18C08J2367/02C08J2403/08C08J2467/02C08J2477/04C08K5/092C08K5/103C08K3/346C08K9/04C08K5/09Y02W90/10
Inventor 侯汉学高山王文涛
Owner SHANDONG AGRICULTURAL UNIVERSITY
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