A polyethylene blown film and composite film that can be easily peeled off after sealing

A technology for blowing film and polyethylene, which is applied in the field of polyethylene blowing film and composite film that can be easily opened after sealing, and achieves the effect of good heat sealing performance, unfavorable damage and improved practical performance.

Active Publication Date: 2016-08-24
GLODSTONE PACKAGING JIAXING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to solve the problems existing in the existing composite film, thereby providing a polyethylene blown film and composite film that can be easily opened after sealing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A polyethylene blown film that is easy to uncover after sealing, including a body, the body is sequentially provided with a composite layer, a base layer, and a heat-sealing layer from outside to inside, the thickness of the composite layer is equal to the thickness of the base layer, and the composite layer The surface tension of the outer wall is 38-42 dynes, and the body is composed of the following components in weight percent: low-density polyethylene 30.34%, linear low-density polyethylene 30.61%, ethylene-acrylate copolymer resin 30.42%, ethylene - Vinyl acetate copolymer 8.63%.

[0020] At a temperature of 190°C and a load of 2.16kg, the melt index of the low-density polyethylene is 1.84g per ten minutes, the melt index of the linear low-density polyethylene is 2.38g per ten minutes, and the ethylene-acrylic acid The melt index of ester copolymer resin is to flow out 3.97g every ten minutes, the melt index of described ethylene-vinyl acetate copolymer is to flow...

Embodiment 2

[0022] A polyethylene blown film that is easy to peel off after sealing, including a body, the body is composed of the following components in weight percentage: 30% low-density polyethylene, 30% linear low-density polyethylene, ethylene-acrylate copolymer resin 30%, ethylene-vinyl acetate copolymer 10%.

[0023] At a temperature of 190°C and a load of 2.16 kg, the melt index of the low-density polyethylene is 1.9 g per ten minutes, the melt index of the linear low-density polyethylene is 2.4 g per ten minutes, and the ethylene-acrylic acid The melt index of ester copolymer resin is to flow out 4g every ten minutes, and the melt index of described ethylene-vinyl acetate copolymer is to flow out 11g every ten minutes, and the melt index of ethylene-acrylate copolymer is to flow out 4g every ten minutes, making The finished body has moderate sealing fastness, moderate peeling force when unraveling, clean peeling interface, easy mixing and processing, and avoids the problems of d...

Embodiment 3

[0025] A polyethylene blown film that is easy to peel off after sealing, including a body, the body is composed of the following components in weight percentage: 29.52% of low-density polyethylene, 29.72% of linear low-density polyethylene, ethylene-acrylate copolymer resin 29.81%, ethylene-vinyl acetate copolymer 10.95%.

[0026] At a temperature of 190°C and a load of 2.16kg, the melt index of the low-density polyethylene is 2.03g per ten minutes, the melt index of the linear low-density polyethylene is 2.47g per ten minutes, and the ethylene-acrylic acid The melt index of ester copolymer resin is to flow out 4.02g every ten minutes, the melt index of described ethylene-vinyl acetate copolymer is to flow out 10.5g every ten minutes, and the melt index of ethylene-acrylate copolymer is to flow out 4.02 every ten minutes g. The finished body has moderate sealing fastness, moderate peeling force when peeling off, clean peeling interface, easy mixing and processing, and avoids t...

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Abstract

The invention relates to a polyethylene blown film that can be easily opened after sealing, including a body, and the body is composed of the following components in weight percentage: low-density polyethylene, linear low-density polyethylene, ethylene-acrylate copolymer resin, Ethylene-vinyl acetate copolymer; advantages of the present invention: the body made by mixing low-density polyethylene, linear low-density polyethylene, ethylene-acrylate copolymer resin, and ethylene-vinyl acetate copolymer, because ethylene-acrylate The copolymer makes the finished body have moderate sealing fastness, moderate peeling force when uncovered, and a clean peeling interface. Ethylene-vinyl acetate copolymer can work well with low-density polyethylene and linear low-density polyethylene in film blowing The combination of them avoids the problems of delamination and wire drawing when uncovered, and the seal is stable.

Description

technical field [0001] The invention relates to a polyethylene blown film and a composite film which can be easily opened after sealing. Background technique [0002] Polyethylene (PE) is a polymer formed by the polymerization of ethylene. The product has been developed for about 60 years, and the global polyethylene production ranks first among the five general-purpose resins. Polyethylene can be divided into high-density polyethylene, low-density polyethylene and linear low-density polyethylene according to different polymerization methods, molecular weight and chain structure. [0003] Low Density Polyethylene (LDPE) is commonly known as high-pressure polyethylene. Because of its low density and the softest material, it is mainly used in plastic bags and agricultural films. High Density Polyethylene (HDPE) is commonly known as low-pressure polyethylene. Compared with LDPE and LLDPE, it has higher temperature resistance, oil resistance, steam permeability resistance and e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/30B32B27/32B32B27/06
Inventor 赵国途卿前仲
Owner GLODSTONE PACKAGING JIAXING
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