Breathable fresh-keeping film with degrading capability and preparation method of breathable fresh-keeping film

A technology of fresh-keeping film and capacity, applied in the field of breathable fresh-keeping film and its preparation, can solve the problems of PE fruit and vegetable fresh-keeping film, such as non-degradable, fruit and vegetable spoilage, environmental pollution, etc., to prolong the fresh-keeping time of fruits and vegetables, solve non-degradable, good water permeability Effect

Inactive Publication Date: 2016-05-18
佛山市博维环保材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a degradable breathable fresh-keeping film and its preparation method, aiming to solve the problem that the existing PE fruit and vegetable fresh-keeping film blocks moisture and makes fruits and vegetables rot in the fresh-keeping film, and at the same time, the PE fruit and vegetable fresh-keeping film cannot degrade, The problem of environmental pollution caused by long-term large-scale use

Method used

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  • Breathable fresh-keeping film with degrading capability and preparation method of breathable fresh-keeping film

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preparation example Construction

[0048] Such as figure 1 Shown, a kind of preparation method of breathable fresh-keeping film with degradability as described above, specifically comprises the following steps:

[0049] Step S100: Add polyvinyl alcohol, degradation aids, antibacterial agents, lubricants and reinforcing agents (powder materials) into the high mixer according to the composition ratio, and add plasticizers and film-forming aids (liquid materials) Mix well to form a liquid material;

[0050] Step S200: Turn on the high-mixer for stirring, stir the plasticizer and film-forming aid evenly, and gradually add all the mixed liquid materials at the same time, until the liquid material is fully absorbed by the uniformly mixed plasticizer and film-forming aid Discharge after mixing evenly;

[0051] Step S300: Use a granulator to granulate the uniformly mixed materials, and then blow the film, and finally obtain a breathable fresh-keeping film with degradable finished product.

[0052] Specifically, in t...

Embodiment 1

[0058] The degradable breathable fresh-keeping film includes: PVA-1199: 20 parts, PVA-2099: 50 parts, tapioca starch: 30 parts, glycerol: 15 parts, and polyethylene glycol: 5 parts by weight. Parts, sodium dodecylbenzenesulfonate: 1 part, titanium dioxide: 1 part, water: 30 parts, potassium sorbate: 1 part.

[0059] Preparation method: put PVA-1199: 20 parts, PVA-2099: 50 parts, tapioca starch: 30 parts, sodium dodecylpicrine sulfonate: 1 part, titanium dioxide: 1 part and potassium sorbate: 1 part, put into Mix evenly in the high mixer; mix glycerol: 15 parts, polyethylene glycol: 5 parts and water: 30 parts evenly, then add them to the high mixer and mix them with powder materials evenly, then discharge, use a granulator to mix The homogenized material is granulated in the range of 160-180°C, and then blown into a film using a film blowing machine at a suitable temperature of 160-180°C.

Embodiment 2

[0061] The degradable breathable plastic wrap includes: PVA-1799: 90 parts, potato starch: 10 parts, glycerol: 40 parts, polyethylene glycol: 10 parts, sorbic acid: 0.5 parts , potassium lauryl polyether sulfate: 1 part, silicon dioxide: 15 parts, water: 5 parts.

[0062] Preparation method: put PVA-1799: 90 parts, potato starch: 10 parts, sorbic acid: 0.5 parts, lauryl polyether potassium sulfate: 1 part and silicon dioxide: 15 parts, put them into a high mixer and mix them evenly; Glycerol: 40 parts, Polyethylene Glycol: 10 parts and Water: 5 parts are mixed evenly and then added to the high mixer and mixed with powder materials evenly before discharging. The granulation is carried out within the range of 160-180°C, and then blown into a film using a film blowing machine.

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Abstract

The invention discloses a breathable fresh-keeping film with degrading capability and a preparation method of the breathable fresh-keeping film. The fresh-keeping film comprises components in parts by weight as follows: 60-100 parts of polyvinyl alcohol, 1-40 parts of a degradation aid, 20-50 parts of a plasticizer, 1-30 parts of a coalescing agent, 0.01-1 part of an antibacterial agent, 0.1-1 part of a lubricating agent and 1-15 parts of a reinforcing agent. The fresh-keeping film has good water permeability and can allow water vapor to permeate, accordingly, the water vapor produced due to passive modified-atmosphere packaging of fruits and vegetables is discharged, proliferation of bacteria in the fresh-keeping film is prevented, and the fresh-keeping time of the fruits and the vegetables is prolonged. The barrier performance of the fresh-keeping film is remarkably superior to that of conventional fresh-keeping films, and the fresh-keeping time of the fruits and the vegetables is generally prolonged by no less than two weeks. Besides, the fresh-keeping film can be naturally degraded after being buried for 3 months in the nature environment, and the problem that conventional fresh-keeping film cannot be degraded is solved.

Description

technical field [0001] The invention relates to a fresh-keeping film, in particular to a degradable breathable fresh-keeping film and a preparation method thereof. Background technique [0002] With the development of economy and social progress, people's living standards are increasing and improving day by day, and people's pursuit of food is becoming more and more nutritious and healthy. Fresh fruits and vegetables just meet this demand and become people's favorite, indispensable and important nutritional food. [0003] Fruits and vegetables are always biologically active after picking, so they are very prone to biologically active growth and life maintenance in the natural environment. On the one hand, this biologically active process consumes the nutrients of the fruits and vegetables themselves and causes the fruits and vegetables to age (such as withered yellow , fiber coarsening, nutrient loss, etc.); on the other hand, due to the continuous production of water vapor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L3/02C08K13/02C08K5/053C08K5/45C08K3/22C08K5/098
CPCC08L29/04C08J5/18C08J2329/04C08J2403/02C08K2201/014C08L2201/06C08L2203/16C08L2205/02C08L2205/025C08L2205/035C08L3/02C08L71/02C08K13/02C08K5/053C08K5/42C08K2003/2241C08K5/098C08L71/00C08K5/09C08K3/36
Inventor 黄伟洪
Owner 佛山市博维环保材料有限公司
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