Biaxial tension polyethylene film and preparation method thereof

A polyethylene film, biaxial stretching technology, used in chemical instruments and methods, flat products, other household appliances, etc., can solve the problem that the anti-needle and impact resistance of plastic flexible packaging materials are not good enough, and there is no biaxial stretching low. Density polyethylene film, anti-needle, poor impact resistance, etc., to achieve excellent performance, excellent mechanical and mechanical properties, and reduce transportation costs.

Inactive Publication Date: 2011-09-07
FSPG HI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Composite plastic flexible packaging materials have a wide range of applications, but the current composite plastic flexible packaging materials generally have the disadvantage of being thicker, and the raw materials used are more and the cost is higher
[0003] In addition, the acupuncture and impact resistance of the above-mentioned plastic flexible packaging materials are not good enough, especially at low temperatures.
During refrigerated storage, there is a certain rate of bag breakage, which affects the quality of food and causes losses
[0004] At present, polyethylene film is mainly produced by blow molding or casting process. Since polyethylene (PE) itself is a polymer material that is easy to crystallize, has a fast crystallization rate, high crystallinity, and a special crystal structure, biaxial stretching has not yet been used. Process to produce LDPE film or LLDPE film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A biaxially stretched polyethylene film, the film thickness is 40 μm, including a single film layer, the film layer includes the following components by weight percentage: metallocene linear low density polyethylene resin 95.8%, antistatic agent 1%, antiblocking agent 0.2%, slip agent 1.0%, antioxidant 2.0%; the metallocene linear low density polyethylene resin is formed by staged polymerization of polyethylene through metallocene catalysis.

[0038]The manufacturing method of biaxially oriented polyethylene film (BOPE) of the present embodiment comprises the following steps: 95.8% of metallocene linear low density polyethylene resin; 1% of antistatic agent; 0.2% of antiblocking agent; 1.0% of slippery agent; Antioxidant 2.0% is mixed and added to the main extruder, melted, plasticized and extruded at 180-280 ° C, extruded through a T-shaped die head at 180-280 ° C, and passed through casting in the range of 10-60 ° C The roller and water tank are chilled and cast into ...

Embodiment 2

[0043] A biaxially stretched polyethylene film with a film thickness of 25 μm, including a three-layer film structure, the thickness of the middle layer is 22.5 μm, and contains the following components in weight percentage: metallocene linear low density polyethylene resin 98.5%, slip agent 1.5% %; the outer layer is 1.0 μm thick and contains the following components by weight: metallocene linear low-density polyethylene resin: 98.5%, anti-blocking agent: 1.5%; the inner surface layer is 1.5 μm thick and contains the following components by weight: metallocene linear Low-density polyethylene resin: 97%, anti-blocking agent: 1.5%, slip agent 1.5%. The metallocene linear low density polyethylene resin is formed by staged polymerization of polyethylene through metallocene catalysis.

[0044] The manufacturing method of the biaxially oriented polyethylene film (BOPE) includes the following steps: adding the ingredients of the middle layer, the inner layer and the outer layer to t...

Embodiment 3

[0049] A biaxially oriented polyethylene film with a film thickness of 45 μm, comprising a five-layer film structure, the middle layer comprising the following components by weight percentage: metallocene linear low density polyethylene resin 97.0%; slip agent 1.0%; antioxidant 2.0%; the upper and middle layers contain the following components by weight: metallocene linear low-density polyethylene resin 97.0%; slip agent 1.0%; antioxidant 2.0%; the middle and lower layers contain the following components by weight: metallocene linear low-density polyethylene Vinyl resin 97.0%; slip agent 1.0%; antioxidant 2.0%. The outer surface layer contains the following components by weight percentage: metallocene linear low density polyethylene resin 94.5%; anti-blocking agent 2.5%; smooth agent 1.0%; antioxidant 2.0%; Low-density polyethylene resin 97.0%; anti-blocking agent 1.0%; antioxidant 2.0%.

[0050] The manufacturing method of the biaxially oriented polyethylene film (BOPE) incl...

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Abstract

The invention discloses a biaxial tension polyethylene film and a preparation method thereof. The biaxial tension polyethylene film comprises at least one film layer, wherein the at least one film layer comprises the following components in percentages by weight: 90-99.5% of metallocene linear low-density polyethylene resin, 0-10% of antistatic agent, 0-5% of antiblocking agent, 0-5% of slipping agent and 0-5% of antioxidant. A packaging material has the advantages of high heat-sealing strength, puncture resistance strength, stiffness and tensile strength, excellent low temperature resistance, durable wetting tension, small use thickness, low cost, energy saving and environment friendliness.

Description

technical field [0001] The invention relates to a biaxially stretched polyethylene film and a manufacturing method thereof, in particular to a biaxially stretched polyethylene film used as a base material in flexible packaging materials and a manufacturing method thereof. Background technique [0002] Most of the composite plastic flexible packaging materials are composed of several layers of film, generally composed of a heat-sealing layer, an adhesive layer and a substrate. The heat-sealing layer provides heat-sealing performance, usually blown polyethylene (IPE) film, Cast polyethylene (CPE) film, cast polypropylene (CPP) film and EVA (ethylene-vinyl acetate copolymer) film; the substrate provides good mechanical properties and functional properties, generally biaxially oriented polyester film (BOPET ), biaxially oriented nylon film (BOPA), biaxially oriented polypropylene film (BOPE), coated polyvinylidene chloride film (PVDC), polyvinyl alcohol film (PVA), aluminum foil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/18B32B27/32C08L23/08B29D7/01
Inventor 张广强伍杰峰吴长青温国锋李俊何庆东
Owner FSPG HI TECH
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