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A kind of frozen packaging film and its manufacturing method

A packaging film and anti-blocking agent technology, applied in the field of new polymer materials, can solve the problems of accelerated food spoilage, contaminated food, reduced activity, etc., and achieve the effect of maintaining flavor and quality, high temperature resistance and weather resistance.

Active Publication Date: 2016-03-16
海南海达丰实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the storage and distribution process of frozen food is carried out in a low temperature environment, the contents are prone to dry consumption and oxidation
Due to the decrease in the mobility of polymer molecular chains, soft plastic packaging bags become brittle and easy to break, and are easily pierced by sharp protrusions of the inner packaging, causing leakage problems and accelerating food spoilage
At present, most of the soft plastic packaging bags used in China are single-layer packaging bags (such as PE bags) or composite packaging. The former has poor barrier performance, and the latter uses adhesives. Most adhesives contain benzene, esters, ketones, etc. Harmful substances and odors are easy to migrate and penetrate to contaminate food
However, foreign countries mostly use multi-layer co-extrusion film, which is in a monopoly position in technology and price.

Method used

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  • A kind of frozen packaging film and its manufacturing method
  • A kind of frozen packaging film and its manufacturing method
  • A kind of frozen packaging film and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Ingredients

[0039] Configure layer A material: slowly add 90kg of polyolefin material, 6kg of anti-blocking agent, and 4kg of slip agent into cold water at 20°C, and stir at 100 rpm to fully swell, disperse and Mix, then slowly raise the temperature to 95°C to accelerate dissolution, and keep it warm for 2 hours until the solution no longer contains tiny particles, and then pass through 28-mesh stainless steel to filter impurities, and then the A-layer material can be prepared.

[0040] Configure layer B material: add 50kg of maleic anhydride-modified polypropylene and 50kg of polyethylene into a stainless steel container at a ratio of 1:1 and mix thoroughly, the stirring speed is 80 rpm, the stirring time is 45 minutes, and the heating temperature at 89°C, and the heating time is 1.2 hours, then layer B can be prepared.

[0041] Prepare C-layer material: add 95kg of polyvinyl alcohol resin and 5kg of anti-blocking agent into a stainless steel container, stir wel...

Embodiment 2

[0055] (1) Ingredients

[0056] Configure layer A material: slowly add 95kg of polyolefin material, 2kg of anti-blocking agent, and 3kg of slip agent into cold water at 20°C, and stir at 80 rpm to fully swell, disperse and Mix, then slowly raise the temperature to 95°C to accelerate dissolution, and keep it warm for 2.3 hours until the solution no longer contains tiny particles, and then pass through 28-mesh stainless steel to filter impurities, and then the A-layer material can be prepared.

[0057] Configure layer B material: add 50kg of maleic anhydride-modified polypropylene and 50kg of polyethylene into a stainless steel container at a ratio of 1:1 and mix thoroughly. The stirring speed is 100 rpm, the stirring time is 30 minutes, and the heating temperature at 92°C, and the heating time is 1.5 hours, then layer B can be prepared.

[0058] Prepare C-layer material: add 99kg of polyvinyl alcohol resin and 1kg of anti-blocking agent into a stainless steel container, stir w...

Embodiment 3

[0072] (1) Ingredients

[0073] Configure layer A material: slowly add 180kg of polyolefin material, 10kg of anti-blocking agent, and 10kg of slip agent into cold water at 20°C, and stir at 100 rpm to fully swell, disperse and Mix, then slowly raise the temperature to 95°C to accelerate dissolution, and keep it warm for 2.5 hours until the solution no longer contains tiny particles, and then pass through 28-mesh stainless steel to filter impurities, and the A-layer material can be prepared.

[0074] Configure layer B material: Add 100kg of maleic anhydride-modified polypropylene and 100kg of polyethylene into a stainless steel container at a ratio of 1:1 and mix thoroughly. The stirring speed is 120 rpm, the stirring time is 60 minutes, and the heating temperature at 90°C, and the heating time is 2 hours, the B-layer material can be prepared.

[0075] Prepare C-layer material: add 199kg of polyvinyl alcohol resin and 1kg of anti-blocking agent into a stainless steel container...

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Abstract

The invention relates to a frozen packaging film and a manufacturing method thereof. The frozen packaging film comprises five layers of co-extrusion structures ABCBA; the layer A is 30-50 microns thick and is prepared from the following raw materials in percentage by weight: 90-95 percent of a polyolefin material, 2-6 percent of an anti-adhesion agent and 1-5 percent of a soothing agent; the layer B is 10-20 microns thick and is prepared by grafting and polymerizing maleic anhydride modified polypropylene and polyethylene in percentage by weight according to a ratio of 1:1 and is called a PE (polyethylene) grafted polymer for short; the layer C is 3-7 microns thick and is prepared from the following raw materials in percentage by weight: 95-99.5 percent of polyvinyl alcohol resin and 0.5-5.5 percent of an anti-adhesion agent. The frozen packaging film is high in weather resistance, can still keep extremely high mechanical property under a low-temperature or high-temperature condition and is extremely high in stopping performance; meanwhile, due to a one-step technology, the production efficiency is effectively improved, and the production cost is reduced; the frozen packaging film is very suitable to package frozen food.

Description

technical field [0001] The invention relates to a frozen packaging film and a manufacturing method thereof, belonging to the field of new polymer materials. Background technique [0002] The family diet tends to be diversified gradually, and there are regional demand deviations and seasonal changes in the food itself, which makes the field of frozen food develop rapidly. Frozen food is processed by freezing to maintain the original quality and hygienic state of the food for a long time in the original freshness or processed state. Its packaging form generally adopts a combination of soft plastic packaging bags and corrugated boxes. Since the storage and distribution process of frozen food is carried out in a low temperature environment, the contents are prone to dry consumption and oxidation. Due to the reduced activity of polymer molecular chains, soft plastic packaging bags also become brittle and easy to break, and are easily punctured by sharp protrusions of the inner ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/08B65D65/40B29D7/01B29C47/06C08L23/14C08L51/06C08L29/04C08K3/36
Inventor 洪景利王子灏朱海
Owner 海南海达丰实业有限公司