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Polyethylene film, packaging composite film, and making method of packaging composite film

A polyethylene film, polyethylene technology, applied in the field of packaging materials, can solve problems such as poor linear tearing

Inactive Publication Date: 2015-12-23
HUANGSHAN NOVEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary polyethylene film has good chemical resistance and oil resistance, but its linear tear resistance is poor

Method used

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  • Polyethylene film, packaging composite film, and making method of packaging composite film
  • Polyethylene film, packaging composite film, and making method of packaging composite film
  • Polyethylene film, packaging composite film, and making method of packaging composite film

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Experimental program
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Effect test

preparation example Construction

[0054] The present invention also provides a method for preparing the packaging composite film described in the above technical solution, comprising the following steps:

[0055] The polypropylene film, the aluminum foil layer and the polyester film are sequentially compounded to obtain a composite film intermediate;

[0056] Composite the composite film intermediate with a polyethylene film to obtain a packaging composite film;

[0057] The polyester film is in contact with the corona layer of the polyethylene film.

[0058] see figure 1 , figure 1 The production process flow chart of the packaging composite film provided by the embodiment of the present invention.

[0059] In the invention, the polypropylene film, the aluminum foil layer and the polyester film are compounded to obtain a composite film intermediate. In the present invention, the compounding method is preferably dry compounding. In the present invention, the polypropylene film and the aluminum foil layer ...

Embodiment 1

[0074] Add the raw materials of the corona layer, the middle layer and the heat-sealing layer respectively into the three barrels of the extruder machine, and the formulas of each raw material are as follows:

[0075] Corona layer: 50kg of linear low-density polyethylene LLDPE manufactured by Yangzi Petrochemical with the brand number 7042 and 25kg of low-density polyethylene LDPE manufactured by Qilu Petrochemical Company with the brand name of 2102TN00;

[0076] Middle layer: 50kg Yangzi Petrochemical's LLDPE grade 7042 and 20kg COC8007F-04 cycloolefin copolymer Topas Advanced Polymers,

[0077] The above-mentioned cyclic olefin copolymer has the following structure:

[0078]

[0079] Heat-sealing layer: 50kg of 100AC low-density polyethylene LDPE, 25kg of SP1520 metallocene linear low-density polyethylene mLLDPE, 0.5kg of 10090-K slip agent and 0.8kg of AB-20LD opening agent.

[0080] Set the first-stage heating temperature of each barrel to 120°C, the second-stage hea...

Embodiment 2

[0091] Add the raw materials of the corona layer, the middle layer and the heat-sealing layer respectively into the three barrels of the extruder machine, and the formulas of each raw material are as follows:

[0092] Corona layer: 55kg of linear low-density polyethylene LLDPE manufactured by Yangzi Petrochemical with the brand name of 7042 and 20kg of low-density polyethylene LDPE manufactured by Qilu Petrochemical Company with the brand name of 2102TN00;

[0093] Middle layer: 45kg of LLDPE manufactured by Yangzi Petrochemical Company with the brand name of 7042 and 25kg of cycloolefin copolymer manufactured by Topas Advanced Polymers Company with the brand name of COC8007F-04;

[0094] The above-mentioned cyclic olefin copolymer has the following structure:

[0095]

[0096] Heat-sealing layer: 55kg of 100AC low-density polyethylene LDPE, 20kg of SP1520 metallocene linear low-density polyethylene mLLDPE, 0.4kg of 10090-K slip agent and 1.0kg of AB-20LD opening agent.

...

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Abstract

The invention provides a polyethylene film, a packaging composite film, and a making method of the packaging composite film. The polyethylene film sequentially comprises a corona layer, a middle layer and a heat sealing layer; the corona layer comprises linear low density polyethylene; the middle layer comprises linear low density polyethylene and olefin resin, and the olefin resin comprises a cycloolefin copolymer and / or polybutylene resin; and raw materials of the heat sealing layer comprise low density polyethylene and metallocene linear low density polyethylene. The linear low density polyethylene and the olefin resin in the polyethylene film are microscopically incompatible and form a unidirectional island structure to make the polyethylene film and the packaging composite film made through using the polyethylene film respectively have good linear tearability. Experiment results show that the tearing width of the polyethylene film is 18.5-19.1mm at an unsealing speed of 1000+ / -50 ~ 1000+ / -10 mm / min with the reference of 20mm width; and the tearing width of the packaging composite film is 18.5-19.6mm at an unsealing speed of 1000+ / -50 ~ 1000+ / -10 mm / min with the reference of 20mm width.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a polyethylene film, a packaging composite film and a preparation method thereof. Background technique [0002] With the improvement of packaging technology, people are no longer satisfied with the necessary functions of food packaging, such as simply protecting food and prolonging the shelf life of food, but put forward higher and higher requirements for the ease of use of food packaging in actual use. Among them, the easy-tearability of packaging is one of the practical functions that people pay more attention to. Therefore, a new type of easy-tear composite film has emerged in due course and has gradually attracted widespread attention. [0003] An ideal functional composite film aimed at easy tearing needs to have the following characteristics: (1) When consumers open the food packaging bag, there should be a relatively ideal cracking effect in the place that need...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/32B32B27/18B32B15/085B32B15/20B32B15/09B32B37/02B32B33/00
CPCB32B27/08B32B15/085B32B15/09B32B15/20B32B27/18B32B27/32B32B27/327B32B33/00B32B37/02B32B2307/582
Inventor 张和平汪学文刘松泉潘安定董文辉陈旭
Owner HUANGSHAN NOVEL
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