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High-transparency polyethylene thermo-contracted film and producing method thereof

A high-transparency, heat-shrinkable film technology, applied in the field of plastic products and packaging materials, can solve the problems of affecting the quality of drinks or beer in the bottle, affecting the appearance of the PVC label outside the bottle, and the effect is not bright, so as to ensure weight and stability performance, and the effect of improving transparency

Active Publication Date: 2006-11-22
SHANGHAI ZIQUAN LABEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. The required heat sealing temperature is too high, which will not only affect the appearance of the PVC label outside the bottle, but also affect the quality of the packaged items in the bottle (such as beverages or beer, etc.)
[0008] 2. The surface is smooth, the stacking is unstable, and the transportation is unsafe
[0009] 3. The surface is blooming or whitish. When it needs to be printed on heat shrinkable film, the effect is not bright
[0010] 4. The strength is not enough, and the weight that can bear is not enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] High-transparency polyethylene heat-shrinkable film, made of a mixture including metallocene LDPE (low-density polyethylene), linear LDPE, LDPE and additives, stirred by a mixer, mixed evenly, the mixture is extruded by an extruder, and blown Molded.

Embodiment 2

[0030] The high-transparency polyethylene heat-shrinkable film as in Example 1, but the proportioning of each component of the mixture for batching is: 4-6 parts by weight of metallocene LDPE, 1-2 parts by weight of linear LDPE, 2-3 parts by weight of LDPE, The auxiliary agent is 0.2-0.4 parts by weight.

[0031] The auxiliary agent may include a lubricant, a plasticizer, and may also include talcum powder or diatomaceous earth.

Embodiment 3

[0033] As the high-transparency polyethylene heat-shrinkable film of embodiment 1, 2, but described lubricant can be the metal salt of stearic acid or stearic acid, as calcium stearate, magnesium stearate and barium stearate etc. ; The plasticizer can be a polyhydric alcohol, such as propylene glycol, glycerol, pentaerythritol, sorbitol or their incomplete esterification products with long-chain fatty acids such as glycerol monostearate and the like.

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Abstract

High-transparency polyethylene heat-shrinkable film is made by compounding, mixing, extrusion blow molding of a mixture consisting of metallocene LDPE, linear LDPE, LDPE and additives. The extruder is a single-screw extruder, and the processing temperature of extrusion blow molding is 160-200°C. The product of the invention has high transparency, bright and vivid appearance after printing, stable packaging and stacking, and is suitable for mechanized production. The product of the invention can be applied to packaging materials such as agricultural products, daily necessities, cosmetics, detergents, food, medicine, and beverages.

Description

technical field [0001] The invention relates to a polyethylene heat-shrinkable film and a production method thereof, in particular to a high-transparency polyethylene heat-shrinkable film and a production method thereof, and belongs to the technical field of plastic products and packaging materials. Background technique [0002] Commodity packaging plays an important role in the storage, quality assurance and beautification of commodities. With the development of the market economy, people have higher and higher requirements for commodity packaging, and a variety of novel packaging materials have also appeared. [0003] In the food, medicine, beverage and other industries, the traditional form of outer packaging is carton packaging, which has poor moisture resistance, and the packaging is prone to mold and cannot withstand extrusion, which is inconvenient for transportation and storage; it consumes natural resources and is not conducive to environmental protection. The cost...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/04C08K5/56B29C61/02
Inventor 毕家铮
Owner SHANGHAI ZIQUAN LABEL CO LTD
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