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High-obstruct multiple-layer film for packaging liquid and manufacturing method thereof

A multi-layer film and high-barrier technology, which is applied in packaging, wrapping paper, transportation and packaging, etc., can solve the problems of high packaging cost, poor oxygen barrier performance, and poor width of packaging materials, so as to reduce material consumption and maximize Application value and effect of cost reduction

Inactive Publication Date: 2007-12-05
刘建林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Among them, due to the poor gas barrier ability of polyethylene (PE), the oxygen barrier performance of the multilayer film with the above-mentioned A and B structures is poor, and it is difficult to meet the requirements of freshness and / or fragrance preservation.
At the same time, due to the poor physical and mechanical strength of PE, the total thickness of structure A, structure B and structure C is 80-120 μm or higher, and it is difficult to reduce the thickness
If the thickness of the packaging is reduced, it will make it difficult for the packaging material to move during the filling production of the automatic filling machine, and due to the poor width of the packaging material, it will cause the final product to deform during the sales process and affect the product appearance, and it is also easy broken bag phenomenon
Due to the limitations of the material properties of the A structure, B structure and C structure, the overall material thickness can no longer be reduced, resulting in high packaging costs, a waste of a lot of resources, and it is difficult to meet the needs of increasingly fierce market competition

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A plastic extrusion blown film machine is used to produce a 45 μm thick polyethylene (PE, Hebei Baili Packaging Co., Ltd.) film, which is treated with a plasma machine to make the surface tension reach more than 38 dynes. The polyethylene film is coated with a dry film thickness of 1 micron (1g / m 2 ) Modified polyvinyl alcohol (PVA1901, Hebei Bairuier Packaging Materials Co., Ltd.).

[0039]A cast polypropylene (CPP, Dongguang Jiachuang Plastic Co., Ltd.) film with a thickness of 20 μm was produced with a plastic cast extruder, and treated with a plasma machine to make the surface tension reach more than 38 dynes. Printing is performed on polypropylene (CPP) film.

[0040] Then dry compound the printing layer on the cast polypropylene film and the modified polyvinyl alcohol layer coated on the polyethylene film with a dry compound machine. Put the laminated film roll into a curing room at 40°C for 24 hours. After the temperature drops to normal temperature, the cutti...

Embodiment 2

[0043] A plastic extrusion blown film machine is used to produce a 40 μm thick polyethylene (PE, Hebei Baili Packaging Co., Ltd.) film, which is treated with a plasma machine to make the surface tension reach more than 38 dynes. The polyethylene film is coated with a dry film thickness of 0.6 micron (0.65g / m 2 ) Modified polyvinyl alcohol (PVA 1901, Hebei Bairuier Packaging Materials Co., Ltd.). Then, printing is performed on the polyvinyl alcohol layer.

[0044] Provide 12 microns thick and biaxially stretched polyester (PET, Hebei Baosu Group) film with a plastic extrusion casting extruder, and process it with a plasma machine to make its surface tension reach more than 38 dynes.

[0045] Laminate the printing layer on the polyvinyl alcohol layer and the polyester film with a solvent-free laminating machine. Put the laminated film roll into a curing room at 40°C for 24 hours. After the temperature drops to normal temperature, it is cut into pieces with a width of 260 cm. ...

Embodiment 3

[0048] Produce 45 μ m thick PE (white) / PE (black) / PE (white) three-layer film (produced by Hebei Baili Packaging Co., Ltd.) with plastic three-layer co-extrusion extrusion film blowing machine, wherein outer layer film adds polyethylene ( PE) white masterbatch, polyethylene black masterbatch is added to the middle layer, and treated with a plasma machine to make the surface tension reach more than 38 dynes. The above-mentioned three-layer film is coated with a dry film thickness of 3 μm (3g / m 2 ) ethylene-vinyl alcohol copolymer (EVOH 7503, Hebei Bairuier Packaging Materials Co., Ltd.).

[0049] A cast polypropylene (CPP, Dongguang Jiachuang Plastic Industry Co., Ltd.) film with a thickness of 20 μm was produced with a plastic extrusion blown film machine, and treated with a plasma machine to make the surface tension reach more than 38 dynes. Printing was performed on cast polypropylene film.

[0050] The printing layer on the casting polypropylene film and the ethylene-viny...

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Abstract

The present invention discloses one kind of multilayer high blocking film for packing liquid material, the multilayer high blocking film includes polyethylene-based heat sealing layer(s), blocking polymer layer(s) preferably of ethylene-vinyl alcohol copolymer, PVA or polyvinylidene dichloride; and protecting layer(s) of polypropylene, polyester, etc. It has the total thickness below 80 micron, preferably of 55-65 micron. The present invention discloses also the making process of the multilayer high blocking film.

Description

technical field [0001] The invention relates to a high barrier multilayer film for packaging liquid materials, especially a high barrier multilayer film for packaging UHT sterilized liquid dairy products. The present invention also relates to a method for manufacturing the above-mentioned high-barrier multilayer film. Background technique [0002] In recent years, liquid dairy packaging has played an increasingly important role in the increasingly fierce competition in the dairy market. High-barrier aseptic packaging effectively prolongs the shelf life of liquid dairy products, and provides a guarantee for dairy companies to break through geographical restrictions and develop towards large-scale and intensive development. [0003] The main nutrients of dairy products include fat, protein, sugar, etc., which are very easy to deteriorate and spoil. In order to keep it fresh during circulation and provide it safely to consumers, milk must be thoroughly sterilized and packaged...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D65/40B32B27/08B32B37/02B32B38/18
Inventor 刘建林
Owner 刘建林
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