Repeated sealing packaging film for food, and preparation method thereof

A technology for packaging film and food, which is applied in the field of re-sealing packaging film for food and its preparation, and can solve the problems of reduced re-sealing performance of packaging film, inability to perform second or third sealing, etc.

Inactive Publication Date: 2020-10-20
JIANGYIN BAOBO PACKING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, many foods that have not been eaten once or several times and need to be sealed and packaged again, such as chocolate, ice cream or jujube cake, etc., in addition to needing to be sealed and packaged again, also need to be refrigerated or frozen again. After many resealable packaging films are refrigerated or frozen for many times, the resealing performance of the packaging film is seriously reduced, and even the second or third sealing cannot be performed.

Method used

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  • Repeated sealing packaging film for food, and preparation method thereof
  • Repeated sealing packaging film for food, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] The present invention is a resealing packaging film for food, which comprises an outer layer, a middle layer, a cold adhesive layer and a heat-sealing layer stacked sequentially from outside to inside, and the outer layer and the middle layer include 45 parts by weight Parts of LLDPE, 25 parts of LDPE, 15 parts of HDPE, 4 parts of antioxidant; The cold adhesive layer includes 8 parts of natural rubber, 9 parts of SIS, 9 parts of SBS, 9 parts of EVA and 6-15 parts of nitrile rubber with an acrylonitrile content of 18-20%, 15 parts of tackifying resin, 10 parts of methyl methacrylate, 9 parts of butyl methacrylate, 11 parts of coupling agent modified calcium carbonate hollow particles, 16.5 parts of copolyester gum, 1.5 parts of ethylene thiourea, 4 parts of zinc oxide, 1.5 parts of phthalate softener, 1 part of microcrystalline wax, 1 part of N, N-zinc dibutylsulfurized aminobenzoate; the heat-sealing layer includes 54 parts by weight of LLDPE, 45 parts of LDPE, 1.2 part...

Embodiment 2

[0021] The present invention is a resealing packaging film for food, comprising an outer layer, a middle layer, a cold adhesive layer and a heat-sealing layer stacked sequentially from outside to inside, and the outer layer and the middle layer include 42 Parts of LLDPE, 23 parts of LDPE, 12 parts of HDPE, 3 parts of antioxidant; the cold adhesive layer includes 7 parts of natural rubber in parts by weight, 6 parts of SIS, 6 parts of SBS, 7 parts of EVA and 13 parts of nitrile rubber with acrylonitrile content of 18-20%, 12 parts of tackifying resin, 18 parts of butyl methacrylate, 10 parts of coupling agent modified calcium carbonate hollow particles, 15 parts of Copolyester glue, 1 part of ethylene thiourea, 2 parts of zinc oxide, 1.5 parts of phthalate softener, 1 part of propyl gallate, 1 part of ethyl phenyl dithioamino Zinc formate; the heat-sealing layer includes 52 parts by weight of LLDPE, 43 parts of LDPE, 1.1 part of anti-blocking agent, and 0.3 part of slippery age...

Embodiment 3

[0024] The invention is a resealing packaging film for food, which comprises an outer layer, a middle layer, a cold adhesive layer and a heat-sealing layer stacked sequentially from outside to inside, and the outer layer and the middle layer include 48 Parts of LLDPE, 28 parts of LDPE, 19 parts of HDPE, 5 parts of antioxidant; the cold adhesive layer includes 9 parts by weight of natural rubber, 6 parts of SIS, 6 parts of SBS, 12 parts of EVA and 15 parts of acrylonitrile content are nitrile rubber of 18-20%, 18 parts of tackifying resin, 20 parts of methyl methacrylate, 10-12 parts of coupling agent modified calcium carbonate hollow particles, 15 parts -18 parts of copolyester gum, 1-2 parts of ethylene thiourea, 2-6 parts of zinc oxide, 2 parts of phthalate softener, 1 part of propyl gallate, 0.5 parts of N, N-zinc dibutylsulfurized aminobenzoate, 0.5 parts of zinc ethylphenyl dithiocarbamate; the heat-sealing layer includes 50-58 parts by weight of LLDPE, 40-50 parts of LDP...

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Abstract

The invention discloses a repeated sealing packaging film for food. The repeated sealing packaging film comprises an outer layer, a middle layer, a cold bonding layer and a heat sealing layer which are sequentially stacked from outside to inside, wherein the cold bonding layer is prepared from the following components in parts by weight: 30 to 50 parts of a thermoplastic elastomer, 10 to 20 partsof a tackifying resin, 18 to 20 parts of an acrylic copolymer, 10 to 12 parts of coupling agent modified calcium carbonate hollow particles, 15 to 18 parts of a copolyester adhesive and 3 to 4 parts of an auxiliary agent, and the heat sealing layer is prepared from the following components in parts by weight: 50 to 58 parts of LLDPE, 40 to 50 parts of LDPE, 1 to 1.5 parts of an anti-blocking agentand 0.3 to 0.5 part of a slipping agent. According to the repeated sealing packaging film for the food, the formula of the cold bonding layer of the packaging film is designed, the coupling modifiedcalcium carbonate hollow particles, the copolyester adhesive and various other components are added, and the components and the main machine have a synergistic effect, so that the food packaging filmhas excellent low-temperature resistance, and the sealing effect of repeated sealing can be kept after multiple times of low-temperature refrigeration or freezing.

Description

technical field [0001] The invention relates to the technical field of food packaging films, in particular to a resealing packaging film for food and a preparation method thereof. Background technique [0002] In recent years, various food packaging containers and packaging films have developed rapidly, and easy-to-tear films, easy-to-remove films and re-sealable packaging films have appeared one after another. The resealable packaging film is heat-sealed through the inner heat-seal layer. When opening for the first time, the heat-seal layer is separated from the cold adhesive layer of the packaging film. When sealing the next time, you only need to press hard to uncover the part The previous heat sealing area does not need to be heat sealed, especially for some foods that cannot be eaten at one time and need to be sealed again. The resealable packaging film improves the convenience and ease of use of this food to a higher level. high level. [0003] However, many foods th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J167/06C09J201/00C09J107/00C09J153/02C09J123/08C09J109/02C09J11/04C09J11/06C09J11/08C08L23/08C08L23/06C08J5/18B32B27/32B32B27/06B32B7/12B32B37/12B32B27/18B65D65/40
CPCB32B7/12B32B27/08B32B27/18B32B27/32B32B37/12B32B37/1284B65D65/40C08J5/18C08J2323/08C08J2423/06C08K2003/2296C08L2205/025C08L2205/035C09J11/04C09J11/06C09J11/08C09J167/06C08L101/00C08L7/00C08L53/02C08L23/0853C08L9/02C08K9/00C08K7/24C08K3/22C08K5/12C08K13/06Y02W90/10Y02A40/90
Inventor 陆锦霞陈宝昆董亮亮陈伟王雪飞
Owner JIANGYIN BAOBO PACKING
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