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Easy-to-tear film for food packing

A technology for food packaging and easy-tear film, which is used in household packaging, packaging, packaged food, etc., can solve the problems of inconvenient use, high heat-sealing strength and tearing, and achieves good toughness, moderate heat-sealing strength, and water resistance. Strong gas effect

Inactive Publication Date: 2018-04-10
WUXI PACIFIC NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the food industry, especially in the cover film market and the lunch box market, the film is often used to seal the packaging box by heat sealing for the purpose of transportation, which requires that the film material must have certain oxygen and water resistance to extend the shelf life of food At the same time, it must have a certain heat-sealing strength to prevent food from leaking during transportation. However, at present, the films on some sealed packaging boxes are not easy to be torn due to the high heat-sealing strength, such as some jelly Packaging and lunch box packaging, etc., so it is very inconvenient to use

Method used

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  • Easy-to-tear film for food packing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] like figure 1 As shown, the easy-to-tear film has a nine-layer composite layer structure with a thickness of 70 μm. The outer layer 1 is composed of two layers of nylon (PA) and one layer of polyethylene (PE). The outer layer 1 of nylon (PA) ) is a mixture of homopolynylon and copolymerized nylon with a mass ratio of 3:1; the polyethylene (PE) in the outer layer 1 is low density polyethylene and metallocene low density polyethylene with a mass ratio of 3:1 Mixture, low density polyethylene density range is 0.915 g / cm 3 , the density range of metallocene low density polyethylene is 0.918g / cm 3 , and two layers of nylon (PA) and one layer of polyethylene (PE) are respectively bonded by an adhesive (Tie) at intervals; the middle layer 2 is ethylene-vinyl alcohol copolymer (EVOH); the inner layer 3 is composed of a layer Nylon (PA) and a layer of polyethylene (PE) are laminated, and the nylon (PA) and polyethylene (PE) of the inner layer 3 are bonded by an adhesive (Tie),...

Embodiment 2

[0021] like figure 2 As shown, the easy-to-tear film has a nine-layer composite layer structure with a thickness of 105 μm. The outer layer 1 is composed of two layers of polypropylene (PP) and one layer of polyethylene (PE). The polyethylene in the outer layer 1 ( PE) is a mixture of low-density polyethylene and metallocene low-density polyethylene with a mass ratio of 3:1, and the density range of low-density polyethylene is 0.918 g / cm 3 , the density range of metallocene low density polyethylene is 0.931g / cm 3 ; The middle layer 2 is ethylene-vinyl alcohol copolymer (EVOH), and the ethylene-vinyl alcohol copolymer (EVOH) is bonded to the polyethylene (PE) of the outer layer 1 through an adhesive (Tie); the inner layer 3 is made of One layer of nylon (PA) and two layers of polyethylene (PE) are laminated. Nylon (PA) and its closest layer of polyethylene (PE) are bonded by adhesive (Tie), and the closest to the middle layer 2. A layer of polyethylene (PE) contains a modifi...

Embodiment 3

[0024] like image 3 As shown, the easy-to-tear film has a nine-layer composite layer structure with a thickness of 80 μm. The outer layer 1 is composed of one layer of nylon (PA) and two layers of polyethylene (PE). The outer layer 1 of nylon (PA) It is a mixture of homopolynylon and copolymerized nylon with a mass ratio of 3:1; the polyethylene (PE) in the outer layer 1 is a mixture of low density polyethylene and metallocene low density polyethylene with a mass ratio of 3:1 , the density range of low-density polyethylene is 0.940 g / cm 3 , the density range of metallocene low density polyethylene is 0.942g / cm 3 , and nylon (PA) and its closest layer of polyethylene (PE) are bonded by adhesive (Tie); the middle layer 2 is nylon (PA); the inner layer 3 is made of two layers of polyethylene (PE) Laminated composition, nylon (PA) in the middle layer 2, a layer of polyethylene (PE) in the outer layer 1 closest to it, and a layer of polyethylene (PE) in the inner layer 3 are all...

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Abstract

The invention provides easy-to-tear film for food packing. The film has proper heat sealing strength, not only is easily torn but also has certain water-blocking and oxygen-blocking performance, and is convenient to use; the film is of a composite-layer structure and comprises an outer layer, a middle layer and an inner layer from top to bottom, the outer layer is a composite layer which is formedby laminating a reinforcement layer and a heat sealing layer, the inner layer is a composite layer which is formed by laminating a heat sealing layer or / and a reinforcement layer, and the heat sealing layer of the inner layer contains modified polyethylene resin with the mass percent of 20-70%.

Description

technical field [0001] The invention relates to the technical field of co-extruded films, in particular to an easy-to-tear film used for food packaging. Background technique [0002] In the food industry, especially in the cover film market and the lunch box market, the film is often used to seal the packaging box by heat sealing for the purpose of transportation, which requires that the film material must have certain oxygen and water resistance to extend the shelf life of food At the same time, it must have a certain heat-sealing strength to prevent food from leaking during transportation. However, at present, the films on some sealed packaging boxes are not easy to be torn due to the high heat-sealing strength, such as some jelly Packaging and lunch box packaging, etc., which are very inconvenient to use. Contents of the invention [0003] In view of the above problems, the present invention provides an easy-tear film for food packaging, which has suitable heat-sealing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/30B32B27/32B32B27/34B32B33/00
CPCB32B27/08B32B27/306B32B27/32B32B27/327B32B27/34B32B33/00B32B2250/24B32B2250/42B32B2307/31B32B2307/558B32B2307/582B32B2307/7244B32B2307/7246B32B2439/70
Inventor 华永芬
Owner WUXI PACIFIC NEW MATERIALS CO LTD