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Puncture-resistant packaging film and preparation method thereof

A packaging film and puncture-resistant technology, applied in packaging, wrapping paper, household packaging, etc., can solve the problems of increasing the puncture resistance of PET film and poor puncture resistance of PET film, so as to achieve increased puncture resistance and enhanced puncture resistance , the effect of cost reduction

Pending Publication Date: 2022-06-03
SUNRISE PACKAGING MATERIAL JIANGYIN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with nylon film, the puncture resistance of PET film is poor. Therefore, when using PET film instead of nylon film as the outer material of packaging film, increasing the puncture resistance of PET film has become an urgent problem to be solved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A puncture-resistant packaging film, comprising an outer layer modified PET film, an aluminum foil and an ethylene-vinyl acetate copolymer film arranged in sequence, and the film thicknesses of the modified PET film, the aluminum foil and the ethylene-vinyl acetate copolymer film are respectively 17um and 18um and 25um, and the layers are connected by co-extrusion. By mass percentage, the components of the modified PET film include 69% PET, 30% chain-extended PET and 1% ethylene glycol, and the chain-extended PET includes PET 75% %, 2,2'-bis(2-oxazoline) 19.5%, heat stabilizer 5% and brightener 0.5%.

[0030] A preparation method of a puncture-resistant packaging film, comprising the following steps:

[0031] (1) Preparation of chain-extended PET: Weigh each component in the chain-extended PET, put it into melt blending equipment for melt blending, the temperature during melt blending is 260°C, and the blending time is 15min , the speed is 50r / min;

[0032] (2) One-bu...

Embodiment 2

[0036] A puncture-resistant packaging film, comprising an outer layer modified PET film, a polyvinylidene chloride film and a polyethylene film arranged in sequence, wherein the thicknesses of the modified PET film, the polyvinylidene chloride film and the polyethylene film are 18 um, 12um and 35um, each layer of film is connected by co-extrusion. According to the mass percentage, the components of the modified PET film include 85% of PET, 12% of chain-extended PET and 3% of terephthalic alcohol, and 3% of chain-extended PET. Including PET 82%, 1,3-phenylene-bis(2-oxazoline) 14%, heat stabilizer 2% and brightener 2%.

[0037] A preparation method of a puncture-resistant packaging film, comprising the following steps:

[0038] (1) Preparation of chain-extended PET: Weigh each component in the chain-extended PET, put it into melt blending equipment for melt blending, the temperature during melt blending is 220°C, and the blending time is 8min , the speed is 80r / min;

[0039] (...

Embodiment 3

[0043] A puncture-resistant packaging film, comprising an outer layer modified PET film, an ethylene-vinyl alcohol copolymer film and a polypropylene film arranged in sequence, wherein the film thicknesses of the modified PET film, the ethylene-vinyl alcohol copolymer film and the polypropylene film are respectively It is 20um, 16um and 30um, and each layer of film is connected by co-extrusion. In terms of mass percentage, the components of the modified PET film include 75% of PET, 20% of chain-extended PET and 5% of neopentyl glycol. Chain PET includes PET 80%, 2,2'-bis(2-oxazoline) 14%, phthalic anhydride 2%, heat stabilizer 3% and brightener 1%.

[0044] A preparation method of a puncture-resistant packaging film, comprising the following steps:

[0045] (1) Preparation of chain-extended PET: Weigh each component in the chain-extended PET, put it into melt blending equipment for melt blending, the temperature during melt blending is 240°C, and the blending time is 12min , ...

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PUM

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Abstract

The invention discloses a puncture-resistant packaging film which comprises an outer modified PET film, a barrier film and an inner heat-sealing film which are sequentially arranged, the modified PET film, the barrier film and the inner heat-sealing film are connected through co-extrusion compounding, and the modified PET film comprises the following components in percentage by mass: 68-85% of PET, 12-30% of chain-extended PET and 1-5% of an alcohol compound. The invention further discloses a preparation method of the puncture-resistant packaging film. The modified PET is used for replacing a nylon film to serve as an outer layer film of the packaging film, under the condition that the total thickness of the packaging film is not increased, the puncture resistance of the packaging film with the structure of the modified PET film / barrier film / heat sealing film is better than that of the packaging film with the structure of the nylon film / barrier film / heat sealing film, and the cost is reduced by 20-30%.

Description

technical field [0001] The invention relates to the technical field of packaging films, in particular to a puncture-resistant packaging film and a preparation method thereof. Background technique [0002] Flexible plastic packaging materials are widely used in the packaging of different products because of their advantages of light weight, low price, softness and convenient transportation. When packaging products containing hard or sharp parts, such as sharp bones, edges and corners, bamboo sticks, etc., packaging The material is subject to strong puncture. If the puncture resistance of the packaging material is poor, the bag will be broken under the puncture action of the inner package, resulting in package leakage and product deterioration. Therefore, according to the characteristics of the packaged contents, puncture resistance is an important physical and mechanical property that flexible plastic packaging materials should have. [0003] In the field of food packaging,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/36B32B27/30B32B15/20B32B15/09B32B15/082B32B38/00B32B27/08B32B27/32B65D65/40C08L67/02C08K5/053C08K5/353C08K5/1539C08J5/18B29D7/01
CPCB32B27/36B32B27/306B32B15/20B32B15/09B32B15/082B32B38/0036B32B27/304B32B27/08B32B27/32B65D65/40C08J5/18B29D7/01B32B2307/31B32B2307/558B32B2439/70C08J2367/02C08J2467/02C08K5/053C08K5/353C08K5/1539Y02W90/10
Inventor 杨伟范文春
Owner SUNRISE PACKAGING MATERIAL JIANGYIN CO LTD
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