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Foodstuff packaging membrane and its manufacturing method

A technology of food packaging film and manufacturing method, applied in packaging, wrapping paper, transportation and packaging, etc., to achieve high barrier properties, overcome processing difficulties, and low production costs

Inactive Publication Date: 2006-02-22
朱春英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, PVDC film raw materials have always been dependent on imports. At present, the total investment of 60,000 tons of PVDC resin under construction and planned in China is nearly 2 billion yuan. It is difficult for all kinds of packaging films on the market to meet the above-mentioned advantages at the same time. , especially the degradable environmental protection characteristics, therefore, it is urgent to develop packaging film materials that are degradable, meet the requirements of environmental protection, and meet the requirements of food packaging

Method used

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  • Foodstuff packaging membrane and its manufacturing method
  • Foodstuff packaging membrane and its manufacturing method
  • Foodstuff packaging membrane and its manufacturing method

Examples

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Embodiment Construction

[0064] In one embodiment of the present invention, the packaging film has a three-layer structure of RF-PA / nano-polymer or EVOH / PA, wherein the nano-polymer is one of nano-PA, nano-EVOH or nano-PET.

[0065] In another embodiment of the present invention, the packaging film has a five-layer structure of RF-PA / nano-PA / MXD6 or EVOH / PA / RF-PA.

[0066] The production method is as follows: select a plasticizing extruder according to the number of layers of the food packaging film bag, extrude through a co-extrusion die, and wind and water cool (up blowing or down blowing) and then draw and coil.

[0067] The production method of the heat-shrinkable stretch film is as follows: through multiple plasticizing extruders, extruding through a co-extrusion film head, down-blown water cooling, synchronous biaxial stretching, heat setting, and rolling to obtain a heat-shrinkable stretch film.

[0068] The transparency of the product of the present invention is that the total light transmitta...

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PUM

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Abstract

The invention discloses a production of food packaging film and the method for preparation, specifically a degradable complex film prepared with degradable nanometer PA polymer as the obstruct material. Said complex film has a layer structure containing at least two outer layers and one interlayer, at least one layer among which is the obstruct layer, the obstruct layer being made up of degradable nanometer PA polymer, and others being made up of degradable polyolefin or polyolefin. Compared with the high-obstruct film prepared with PVDC, the invention overcomes the shortcomings that the manufacture is hard, the cost is high, environmental pollution is serious, and the recovery is hard. And the high-obstruct packaging film prepared mainly with nanometer PA has identical obstruct effect with PVDA film.

Description

technical field [0001] The invention relates to a food packaging film and a manufacturing method thereof, belonging to the technical field of nano-plastics. Background technique [0002] In the field of food packaging, it is usually required that high-temperature cooking food packaging films or bags meet the following requirements: [0003] √It can withstand heating and cooking at 121°C for 40 minutes, without deformation inside and outside the packaging bag, without cracking or permeation at the heat seal, and without separation of layers. [0004] √ High barrier to oxygen, water vapor, food aroma, seasoning aroma, etc. [0005] √Good chemical stability, no chemical reaction with acid, alkali, salt solvent, oil. [0006] √Good mechanical strength and good heat sealing performance. [0007] √ Make ham sausage packaging with meat stickiness. [0008] √Comply with food hygiene requirements, non-toxic and harmless to human body. [0009] Since the development in Europe and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D65/40B32B27/00B29C49/04B29C47/06B29C55/28
Inventor 朱春英
Owner 朱春英
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