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Degradable food packaging bag and preparation method thereof

A technology for packaging bags and food, applied in the field of degradable food packaging bags and their preparation, can solve the problems of water resistance, low strength, unpracticality, and no thermoplasticity of packaging bags, and achieves improved mechanical properties and barrier properties. The effect of improving compatibility and improving toughness

Pending Publication Date: 2020-06-23
ANHUI SONGTAI PACKAGING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, there are packaging films made purely from natural polymers derived from plants, animals and plants. Although this material is very environmentally friendly and easy to degrade, it is difficult to process because this natural polymer material is not thermoplastic. , leading to the shortcomings of the water resistance and low strength of the packaging bag made, and the practical effect cannot be achieved.

Method used

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  • Degradable food packaging bag and preparation method thereof

Examples

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Effect test

preparation example Construction

[0041] The preparation method of this packing bag, comprises the steps:

[0042] Step S1, drying the modified PBAT in a vacuum oven at 80°C for 4-5 hours;

[0043] Step S2, after uniformly mixing the dried modified PBAT, reinforcing filler and plasticizer, extruding and granulating through a twin-screw granulator to obtain plastic granules;

[0044] Step S3, the plastic particles are blown into a packaging film by a film blowing machine, and the packaging film is cut and bag-made to obtain the packaging bag.

Embodiment 1

[0046] A degradable food packaging bag, made of the following raw materials in parts by weight: 60 parts of modified PBAT, 3 parts of reinforcing filler, and 0.8 parts of plasticizer;

[0047] The packaging bag is made by the following steps:

[0048] Step S1, drying the modified PBAT in a vacuum oven at 80°C for 4 hours;

[0049] Step S2, after uniformly mixing the dried modified PBAT, reinforcing filler and plasticizer, extruding and granulating through a twin-screw granulator to obtain plastic granules;

[0050] Step S3, the plastic particles are blown into a packaging film by a film blowing machine, and the packaging film is cut and bag-made to obtain the packaging bag.

Embodiment 2

[0052] A degradable food packaging bag, made of the following raw materials in parts by weight: 65 parts of modified PBAT, 3.5 parts of reinforcing filler, and 0.9 parts of plasticizer;

[0053] The packaging bag is made by the following steps:

[0054] Step S1, drying the modified PBAT in a vacuum oven at 80°C for 4.5 hours;

[0055] Step S2, after uniformly mixing the dried modified PBAT, reinforcing filler and plasticizer, extruding and granulating through a twin-screw granulator to obtain plastic granules;

[0056] Step S3, the plastic particles are blown into a packaging film by a film blowing machine, and the packaging film is cut and bag-made to obtain the packaging bag.

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Abstract

The invention discloses a degradable food packaging bag which is prepared from the following raw materials in parts by weight: 60-70 parts of modified PBAT, 3-4 parts of reinforcing filler and 0.8-1 part of plasticizer. The invention further discloses a preparation method of the packaging bag. The preparation method comprises the steps that S1, a vacuum drying box is used; S2, extruding and granulating are performed; and S3, the plastic particles are made into packaging films through a film blowing machine, and the packaging films are slit and bagged. According to the packaging bag, the modified PBAT is used as a matrix substance of the packaging bag material, the advantages of PLA and PBAT are integrated, the interfacial compatibility of PLA and PBAT can be improved under the action of the modifier, and the hydrolysis resistance of polyester is improved; by adding the reinforcing filler, the compactness and the mechanical property of the packaging film are improved; the adopted raw materials belong to biodegradable materials, so that the obtained packaging bag is degradable, meets the environmental protection requirement, has high mechanical property and barrier property, and is high in practicability.

Description

technical field [0001] The invention belongs to the field of food packaging, and in particular relates to a degradable food packaging bag and a preparation method thereof. Background technique [0002] With the acceleration of the pace of life, convenient and hygienic food packaging is gradually developing. Products such as disposable foam plastic lunch boxes, plastic packaging bags, and plastic daily necessities have frequently entered daily life, bringing a lot of convenience. Since plastic products are not easy to degrade after being discarded, the phenomenon of serious environmental pollution "white pollution" is caused. As the main body of food packaging, plastic food packaging bags have also become one of the important pollution sources in white pollution. Therefore, higher requirements are put forward for food packaging bags, and the research on food packaging bags is also developing in the direction of non-toxic, harmless, green and environmental protection, among w...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08L75/08C08K9/10C08K7/24C08J5/18B65D65/46C08G18/75C08G18/66C08G18/48C08G18/30
CPCC08J5/18B65D65/466C08G18/755C08G18/4879C08G18/2845C08J2367/04C08J2467/02C08J2475/08C08K9/10C08K7/24Y02W90/10Y02A40/90
Inventor 焦国平齐继业方兴旺程国金
Owner ANHUI SONGTAI PACKAGING MATERIALS
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