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Uncovered high-sealing aluminum-plastic cover film

An aluminum-plastic cover and high-sealing technology, applied in the direction of sealing, non-polymer adhesive additives, grafted polymer adhesives, etc., can solve the problem of poor anti-pollution heat sealing effect of heat-sealing layer materials, barrier layer and inner The high bonding strength of the heat-sealing layer and the insufficient bonding stability of the aluminum-plastic cover film have achieved the effects of excellent anti-pollution heat-sealing performance, low peel strength, and good user experience

Inactive Publication Date: 2019-10-15
LONG SHENG JIANGSU PHARMA PACKAGING MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The general aluminum-plastic cover film currently used in the market generally has the following defects: 1. The bonding strength between the barrier layer and the inner heat-sealing layer is too high, and it is not easy to peel off; 2. The material of the inner heat-sealing layer has good moisture resistance and gas barrier properties It is also better, when the material in the container cannot emit gas into the ambient air after sealing; 3, the anti-pollution heat sealing effect of the heat-sealing layer material is poor, resulting in serious leakage of liquid and air after sealing; 4, aluminum-plastic The bonding stability of each layer of the cover film is not enough

Method used

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  • Uncovered high-sealing aluminum-plastic cover film
  • Uncovered high-sealing aluminum-plastic cover film
  • Uncovered high-sealing aluminum-plastic cover film

Examples

Experimental program
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preparation example Construction

[0044] The present invention also provides a kind of preparation method of modified binder, comprises the following steps:

[0045] 1) Polyurethane, polymethylene polyphenyl polyisocyanate, maleic anhydride-modified polyolefin resin, polyvinyl alcohol, propenyl phenyl ether, rosin, closed-1,2-dicarbodeca Add diborane and additives into the stirring tank and heat and stir evenly;

[0046] 2) Continue to add nano-carbon powder, molybdenum disulfide, erucamide and the second filler, heat and stir evenly;

[0047] 3) Add a curing agent and stir evenly to obtain a modified binder.

[0048] In a preferred embodiment, the barrier layer is a soft aluminum foil layer. The protective layer is a polyester layer. The release layer is preferably coating grade polyethylene. More preferably, the thickness of the barrier layer is between 10 microns and 20 microns.

[0049] The preparation method of the whole product of the present invention is as follows: dry compounding, extrusion compo...

Embodiment 1

[0053] The heat-sealing layer comprises the following raw materials in parts by weight:

[0054]

[0055] The modified binder comprises the following materials in parts by weight:

[0056]

[0057]The second filler is a mixture of ultrafine glass wool, nano alumina powder and nano calcium carbonate powder. Auxiliaries include solvents, stabilizers and coupling agents.

Embodiment 2

[0059] The heat-sealing layer comprises the following raw materials in parts by weight:

[0060]

[0061] The modified binder comprises the following materials in parts by weight:

[0062]

[0063] The second filler is a mixture of ultrafine glass wool, nano alumina powder and nano calcium carbonate powder. Auxiliaries include solvents, stabilizers and coupling agents.

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Abstract

The invention discloses a uncovered high-sealing aluminum-plastic cover film, the uncovered high-sealing aluminum-plastic cover film comprises a heat-sealing layer, an easy-to-peel layer, a barrier layer, a modified adhesive layer and a protective layer which are sequentially arranged, wherein the heat-sealing layer comprises the following raw materials in parts by weight: 30-70 parts of metallocene low-density polyethylene; 30-70 parts of an ethylene-vinyl acetate copolymer; 20-50 parts of polypropylene resin; 20-50 parts of ethylene methyl acrylate; 20-40 parts of polycarbonate; 20-40 partsof polyamide; 10-40 parts of a polyolefin elastomer and 10-80 parts of a first filler. The heat-sealing layer of the inner layer has excellent toughness, stress cracking resistance and heat fusion resistance, can be well sealed with various containers, and has excellent pollution-resistant heat-sealing performance; in addition, by compounding other raw materials, the heat-sealing layer also has good air permeability, and substances in the sealed containers can effectively emit gases into the ambient air to achieve the desired effect and meet the needs of users.

Description

technical field [0001] The invention relates to the field of packaging materials, in particular to a peel-off high-sealing aluminum-plastic cover film. Background technique [0002] At present, in some applications, there is generally a need for an aluminum-plastic cover film, which is used to seal the opening of the plastic container and is easily peeled off. After the outer layer of aluminum-plastic film is peeled off, the inner heat-sealing layer is still completely welded on the On the plastic container, the gas emitted by the material in the container can effectively pass through the heat-sealing film and enter the ambient air to achieve the purpose of treatment or environmental improvement. For example, the packaging of fragrances, aromatherapy, insect repellants, camphor balls, etc., needs to be well sealed during storage and transportation. The user needs to peel off the outer aluminum-plastic film when using it, and the inner heat-sealing layer is still completely w...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/32B32B27/30B32B27/36B32B27/34B32B27/20B32B7/12B32B15/20B32B15/09B32B33/00C08L23/08C08L23/06C08L23/12C08L69/00C08L77/00C08K13/04C08K3/22C08K5/134C08K7/06C09J175/04C09J129/04C09J151/06C09J11/06C09J11/04B65D53/06
CPCB32B7/12B32B15/09B32B15/20B32B27/08B32B27/20B32B27/306B32B27/32B32B27/327B32B27/34B32B27/365B32B33/00B32B2264/12B32B2270/00B32B2307/724B32B2307/7246B65D53/06C08K2003/222C08K2003/2296C08K2003/3009C08K2201/011C08L23/0853C08L2205/035C08L2207/066C09J11/04C09J11/06C09J175/04C08L23/06C08L23/12C08L23/0869C08L69/00C08L77/00C08K13/04C08K3/22C08K5/1345C08K7/06C08L29/04C08L51/06C08K13/02C08K3/04C08K3/30C08K5/20
Inventor 高文定吴亚飞
Owner LONG SHENG JIANGSU PHARMA PACKAGING MATERIAL CO LTD