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Cast polypropylene heavy packaging film

A technology of casting polypropylene and packaging film, applied in the directions of packaging, wrapping paper, transportation and packaging, etc., can solve the problems of use in the field of heavy packaging, poor low temperature resistance and impact resistance, brittle film, etc., to achieve vertical and horizontal High tear strength, high flex crack resistance, and the effect of reducing interfacial tension

Inactive Publication Date: 2012-06-20
任丘市京开塑业有限公司
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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 cast polypropylene heavy packaging film to overcome the defects of ordinary cast polypropylene film being brittle, poor in low temperature resistance and impact resistance, and unable to be used in the field of heavy packaging

Method used

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  • Cast polypropylene heavy packaging film

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A kind of cast polypropylene heavy packaging film, its structure is as figure 1 As shown, it includes heat sealing layer 1, core layer 2 and corona layer 3. The heat-sealing layer 1 selects a ternary copolymerized polypropylene and an elastomer blend, wherein the elastomer content in the blend is 30% of the total weight; the core layer 2 selects a binary copolymerized polypropylene and an elastomer blend, wherein The content of elastomer in the blend is 40%; the corona layer 3 is a blend of binary copolymerized polypropylene and elastomer, wherein the content of elastomer in the blend is 20%. The blend of heat seal layer, core layer and corona layer is plasticized and extruded through an extruder at 240°C, and then cast through a T-shaped die head at 230°C, and then passed through a casting roll at 25°C Cold film formation, and corona spark treatment is carried out on the surface of the corona layer 3, making its surface tension greater than 38mN / m, and then winding at...

Embodiment 2

[0027] A kind of cast polypropylene heavy packaging film, its structure is as figure 1 As shown, it includes heat sealing layer 1, core layer 2 and corona layer 3. The heat-sealing layer 1 selects a ternary copolymerized polypropylene and an elastomer blend, wherein the elastomer content in the blend is 20% of the total weight; the core layer 2 selects a binary copolymerized polypropylene and an elastomer blend, wherein The content of elastomer in the blend is 30%; the corona layer 3 is a blend of binary copolymerized polypropylene and elastomer, wherein the content of elastomer in the blend is 10%. The blend of heat seal layer, core layer and corona layer is plasticized and extruded through an extruder at 240°C, and then cast through a T-shaped die head at 230°C, and then passed through a casting roll at 25°C Cold film formation, and corona spark treatment is carried out on the surface of the corona layer 3, making its surface tension greater than 38mN / m, and then winding at...

Embodiment 3

[0030] A kind of cast polypropylene heavy packaging film, its structure is as figure 1 As shown, it includes heat sealing layer 1, core layer 2 and corona layer 3. The heat-sealing layer 1 selects a ternary copolymerized polypropylene and an elastomer blend, wherein the elastomer content in the blend is 30% of the total weight; the core layer 2 selects a binary copolymerized polypropylene and an elastomer blend, wherein The content of elastomer in the blend is 40%; the corona layer 3 is a blend of binary copolymerized polypropylene and elastomer, wherein the content of elastomer in the blend is 20%. The blend of heat seal layer, core layer and corona layer is plasticized and extruded through an extruder at 240°C, and then cast through a T-shaped die head at 230°C, and then passed through a casting roll at 25°C Cold film formation, and corona spark treatment is carried out on the surface of the corona layer 3, making its surface tension greater than 38mN / m, and then winding at...

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Abstract

The invention relates to a cast polypropylene heavy packaging film, which consists of a heat-seal layer, a core layer and a corona layer, wherein the heat-seal layer, the core layer and the corona layer are made of a polypropylene and elastomer blend; the heat-seal layer contains 20 to 30 weight percent of elastomer; the core layer contains 30 to 50 weight percent of elastomer; and the corona layer contains 10 to 20 weight percent of elastomer. The cast polypropylene heavy packaging film is convenient to prepare, product thickness is effectively reduced, the cast polypropylene heavy packaging film can be used at low temperature of -35DEG C, the dart impact strength and puncture resistance of the film can be improved, and the cast polypropylene heavy packaging film meets the requirement of heavy packaging.

Description

technical field [0001] The present invention relates to a layered product for packaging, in particular to a cast polypropylene heavy packaging film. Background technique [0002] Usually, the packaging film that can carry 10-50 kg of solid particles or powdery materials is called "heavy packaging film". The packaging bags made of heavy packaging film are mainly used for packaging plastic raw materials, chemical fertilizers, animal feed, sugar, Medicines, seeds and grains etc. At present, the heavy packaging films used at home and abroad are all prepared by blown film technology, and the film thickness is 160-180 μm. [0003] The packaging forms of heavy packaging bags mainly include plastic woven bags, paper-plastic composite bags, paper bags and heavy packaging film bags. Although the heavy packaging bags dominated by the previous three packaging forms occupy a dominant position in the domestic market, due to the limitations of some of them, with the international and dom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/18B32B27/32B65D65/40
Inventor 蒋维汪学志
Owner 任丘市京开塑业有限公司
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