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Composite heavy packaging film

A technology of heavy packaging and weight ratio, which is applied in the field of paper-aluminum-plastic composite packaging film, can solve the problems of non-compliance with food safety laws, poor barrier performance, low repacking speed, etc., and achieve good environmental adaptability, good Effect of physical and mechanical properties, good thermal tack properties

Active Publication Date: 2013-07-17
HUANGSHAN NOVEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) Traditional paper-plastic composite bags are easy to break, resulting in a large amount of product loss and poor appearance;
[0004] (2) Traditional paper-plastic composite bags have higher requirements for temperature and humidity in storage, logistics and transportation environments;
[0005] (3) Printing on the surface of plastic woven bags requires the use of benzene-containing inks, which do not meet the requirements of the Food Safety Law, thus restricting its use in the field of food packaging;
[0006] (4) The traditional heavy packaging speed is low, and it is difficult to adapt to the high-speed packaging requirements of the packaging line;
[0007] (5) The traditional FFS packaging (FFS bag is an abbreviation for the integration of bag making (Film)-filling (Fil1)-sealing (Sea1)), although it can realize continuous one-time automatic molding, but the packaging content, heat sealing There are some disadvantages in strength, palletizing, transportation and other links
[0008] (6) Traditional packaging bags of this type do not meet the requirements in terms of barrier performance, and cannot pack some products that require high barrier performance

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The present invention includes the following steps:

[0029] a) PET / AL composite process

[0030] b) PET / AL / PE composite process

[0031] c) Kraft paper / PET / AL / PE composite process

[0032] The b) Kraft paper / AL / PET / PE composite process includes the preparation process of PE. In the preparation process,

[0033] The outer layer is blended and extruded by high-pressure low-density polyethylene LDPE, linear low-density polyethylene LLDPE, and metallocene low-density polyethylene m-LLDPE. The weight ratio of high pressure low density polyethylene LDPE, linear low density polyethylene LLDPE and metallocene low density polyethylene m-LLDPE is 1:1:2;

[0034] The middle layer is blended and extruded by high pressure low density polyethylene LDPE, linear low density polyethylene LLDPE, and medium density polyethylene MDPE. The weight ratio of high pressure low density polyethylene LDPE, linear low density polyethylene LLDPE, and medium density polyethylene MDPE is 1:2:1

[0035] The inn...

Embodiment 2

[0039] In addition to the aforementioned c) BOPA / PE composite process, including the preparation process of PE, in the preparation process,

[0040] The outer layer is blended and extruded by high-pressure low-density polyethylene LDPE, linear low-density polyethylene LLDPE, and metallocene low-density polyethylene m-LLDPE. The weight ratio of high pressure low density polyethylene LDPE, linear low density polyethylene LLDPE, metallocene low density polyethylene m-LLDPE is 1:1:1;

[0041] The middle layer is blended and extruded by high pressure low density polyethylene LDPE, linear low density polyethylene LLDPE, and medium density polyethylene MDPE. The weight ratio of high pressure low density polyethylene LDPE, linear low density polyethylene LLDPE, and medium density polyethylene MDPE is 1:1:1.

[0042] The inner layer is blended and extruded from high-pressure low-density polyethylene LDPE, metallocene linear low-density polyethylene m-LLDPE, and 3-amino-5-mercapto-1,2,4-triaz...

Embodiment 3

[0045] In addition to the above-mentioned c) BOPA / PE composite process, including the preparation process of PE, in the preparation process,

[0046] The outer layer is blended and extruded by high pressure low density polyethylene LDPE, linear low density polyethylene LLDPE, and metallocene low density polyethylene m-LLDPE. The weight ratio of high pressure low density polyethylene LDPE, linear low density polyethylene LLDPE, and metallocene low density polyethylene m-LLDPE is 1:2:1;

[0047] The middle layer is blended and extruded by high-pressure low-density polyethylene LDPE, linear low-density polyethylene LLDPE, and medium-density polyethylene MDPE. The weight ratio of high pressure low density polyethylene LDPE, linear low density polyethylene LLDPE, and medium density polyethylene MDPE is 1:1:2

[0048] The inner layer is blended and extruded by high-pressure low-density polyethylene LDPE and metallocene linear low-density polyethylene m-LLDPE. The weight ratio of high pre...

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Abstract

The invention discloses a composite heavy packaging film, comprising, from exterior to interior, a kraft paper layer, a PET polyester layer, an AL layer and a three-layer co-extruded polyethylene layer. Compared with the prior art, the invention has the following advantages: through usage of a composite structure, AL of a barrier layer can be effectively protected and is prevented from easy fracture; through mutual cooperation of a plurality of substrates, the composite heavy packaging film has good environmental suitability and barrier properties and adapts to packaging of a variety of large-volume contents.

Description

Technical field [0001] The invention belongs to a composite heavy packaging film, in particular a paper, aluminum-plastic material composite packaging film. Background technique [0002] At present, packaging films that can carry 10kg-50kg of solid particles or powder materials are generally called heavy packaging films. Heavy packaging film is mainly used for packaging plastic raw materials, fertilizers, feed, rice, soybeans and grains. It includes PP woven bags, paper bags and co-extruded PE heavy packaging bags. Although the above-mentioned traditional packaging forms dominate the domestic market, they still dominate the domestic market. However, due to the defects of the packaging materials themselves, the traditional heavy packaging forms directly limit their further development in the heavy packaging field. [0003] (1) The traditional paper-plastic composite bag is easy to rupture, resulting in a large amount of product loss and poor appearance; [0004] (2) Traditional pap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/09B32B15/20B32B27/10B65D65/40
Inventor 江继忠鲍祖本潘健吴志刚陈旭周黎丽
Owner HUANGSHAN NOVEL
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