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High-performance light-weight PE heat shrinkage film and preparation method thereof

A heat-shrinkable film and lightweight technology, applied in the field of film materials, can solve the problems of high recycling pressure and high cost, and achieve the effects of large lateral shrinkage, high clamping force and good visual effect.

Active Publication Date: 2022-02-25
HUANGSHAN NOVEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These packaging films are not only costly, but also under pressure to recycle

Method used

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  • High-performance light-weight PE heat shrinkage film and preparation method thereof
  • High-performance light-weight PE heat shrinkage film and preparation method thereof
  • High-performance light-weight PE heat shrinkage film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A kind of preparation method of high-performance lightweight PE heat-shrinkable film of the present invention, comprises the following steps:

[0053] Step 1, extrusion: put the raw materials of the corona layer, sub-outer layer 1, middle layer, sub-outer layer 2 and heat-sealing layer into the German WH five-layer co-extrusion blown film machine in sequence according to the above component ratio requirements After being heated into a melt through the trough barrel, barrel 1 zone, barrel 2 zone, barrel 3 zone, barrel 4 zone, screen changing zone, and flange zone, it is extruded into a tube through a die; extrusion parameters : The temperature of the trough-type barrel is 50°C, the temperature of the barrel 1 zone is 185°C, the temperature of the barrel 2 zone, the barrel 3 zone, the barrel 4 zone, the screen changing zone, and the flange zone are all 195°C, the die head temperature is 200°C; the extrusion rate is 560kg / h;

[0054] Step 2, film blowing: After the tube l...

Embodiment 2

[0059] The preparation method is the same as in Example 1, only the formulation of each film layer is adjusted, specifically: the corona layer includes the first metallocene polyethylene resin, high-pressure low-density polyethylene resin and Fluoride processing aid; the heat-sealing layer includes the first metallocene polyethylene resin, high-pressure low-density polyethylene resin, fluoride processing aid and slippery agent with a mass ratio of 82:18:0.2:1; the The second outer layer one and the second outer layer both include the second metallocene polyethylene resin, the low-pressure high-density resin, the third metallocene polyethylene resin and a fluoride processing aid with a mass ratio of 42:33:27:0.3; The middle layer includes the second metallocene polyethylene resin, low-pressure high-density resin, high-pressure low-density polyethylene resin and fluoride processing aid in a mass ratio of 42:38:20:0.2.

Embodiment 3

[0061] The preparation method is the same as in Example 1, only the formulation of each film layer is adjusted, specifically: the corona layer includes the first metallocene polyethylene resin, high-pressure low-density polyethylene resin and Fluoride processing aid; the heat-sealing layer includes the first metallocene polyethylene resin, high-pressure low-density polyethylene resin, fluoride processing aid and slippery agent with a mass ratio of 78:22:0.2:1; the The second outer layer one and the second outer layer both include the second metallocene polyethylene resin, the low-pressure high-density resin, the third metallocene polyethylene resin and the fluoride processing aid with a mass ratio of 38:37:23:0.3; The middle layer includes the second metallocene polyethylene resin, low-pressure high-density resin, high-pressure low-density polyethylene resin and fluoride processing aid in a mass ratio of 38:42:20:0.2.

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Abstract

The invention belongs to the technical field of packaging materials, and particularly relates to a high-performance light-weight PE heat shrinkage film and a preparation method thereof. The PE heat shrinkage film comprises a corona layer, a first secondary outer layer, a middle layer, a second secondary outer layer and a heat sealing layer, wherein the formula of the corona layer is basically the same as that of the heat sealing layer, and the formula of the first secondary outer layer is the same as that of the second secondary outer layer. According to the invention, a five-layer film blowing symmetrical structure formula is adopted, a particle formula and process parameters are reasonably designed, so that the performance difference caused by thickness reduction is made up, the packaging requirements of customers are met while the weight is reduced, and the whole packaging material has the advantages of being small in thickness, high in transverse and longitudinal shrinkage rate, high in clamping force, free of springback, high in tensile strength and high in puncture resistance and tearing resistance; the optical performance is good; and the film has the advantages of moderate and stable dynamic and static friction coefficients, favorable thickness uniformity, favorable flatness, favorable printing adaptability and favorable heat-sealing stability and is suitable for automatic packaging equipment, and a packaged product has favorable fitting property and neat bull eyes.

Description

technical field [0001] The invention belongs to the field of film materials, and in particular relates to a high-performance lightweight PE heat-shrinkable film and a preparation method thereof. Background technique [0002] At present, the plastic shrink film market is developing rapidly, and it is involved in food, medicine, electronic appliances, industrial packaging and other fields. Common plastic shrink film has good flexibility, impact resistance, tear resistance, not easy to break, not afraid of moisture, shrinkage Large size, excellent optical performance and other characteristics, its obvious advantages make it a development trend to replace traditional carton packaging. [0003] There are different types of plastic shrink films, each with its own unique characteristics and advantages. Compared with other plastic shrink films, PE heat shrinkable films are low in cost, environmentally friendly (recyclable), have excellent shelf effects, and have good protection. C...

Claims

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Application Information

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IPC IPC(8): B32B27/32B32B27/18B32B27/06B65D65/40B29D7/01
CPCB32B27/32B32B27/18B32B27/08B65D65/40B29D7/01B32B2250/242B32B2307/412B32B2307/75B32B2307/31B32B2307/558B32B2553/00Y02W30/80
Inventor 查显宇胡国利胡忠立常维国
Owner HUANGSHAN NOVEL
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