Aluminium foil sealing film and preparation method thereof

A sealing film, aluminum foil technology, applied in chemical instruments and methods, sealing, closing and other directions, can solve the problem that the sealing film cannot meet the requirements of easy opening and 121 ℃ resistance at the same time

Active Publication Date: 2012-10-03
ZHEJIANG GOLDSTONE PACKING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: the sealing film of the polypropylene plastic bottle in the prior art has not been able to satisfy the cooking performance of being easy to peel off and 121°C, especially 130°C, so as to provide a sealing film that can meet the requirements of easy peeling at the same time. Aluminum foil sealing film with opening and 130℃ retort resistant polypropylene plastic mouth

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] An aluminum foil sealing film is provided with a protective layer, a barrier layer and a heat-sealing layer sequentially from top to bottom, the protective layer is a PET film layer, the barrier layer is an aluminum foil layer, and the heat-sealing layer consists of the following parts by weight Material composition, 15wt% polybutene, 25wt% ethylene-propylene copolymer and 60wt% HDPE.

[0030] The preparation method of the heat-sealing layer in this embodiment is as follows: the polybutene, the ethylene-propylene copolymer, and the high-density polyethylene are uniformly mixed and then blow-molded at 165°C.

[0031] The preparation method of aluminum foil sealing film described in the present embodiment is as follows:

[0032] (1) Apply an adhesive on the surface of the aluminum foil layer, and dry it at 40°C to cure the adhesive on the aluminum foil layer to form the first adhesive layer; Next, the PET film layer and the first adhesive layer are heat-compressed togeth...

Embodiment 2

[0035] An aluminum foil sealing film is provided with a protective layer, a barrier layer and a heat-sealing layer sequentially from top to bottom, the protective layer is a PET film layer, the barrier layer is an aluminum foil layer, and the heat-sealing layer consists of the following parts by weight Material composition, 20wt% polybutene, 30wt% ethylene-propylene copolymer and 50wt% HDPE.

[0036] The preparation method of the heat-sealing layer in this embodiment is as follows: the polybutene, the ethylene-propylene copolymer, and the high-density polyethylene are uniformly mixed and then blow-molded at 170°C.

[0037] The preparation method of aluminum foil sealing film described in the present embodiment is as follows:

[0038] (1) Apply an adhesive on the surface of the aluminum foil layer, and dry it at 50°C to cure the adhesive on the aluminum foil layer to form the first adhesive layer; Next, the PET film layer and the first adhesive layer are heat-compressed togeth...

Embodiment 3

[0041] An aluminum foil sealing film is provided with a protective layer, a barrier layer and a heat-sealing layer sequentially from top to bottom, the protective layer is a varnish layer, the barrier layer is an aluminum foil layer, and the heat-sealing layer is composed of the following materials in parts by weight Composition, 25wt% polybutene, 35wt% ethylene-propylene copolymer and 40wt% HDPE.

[0042] The preparation method of the heat-sealing layer in this embodiment is as follows: the polybutene, the ethylene-propylene copolymer, and the high-density polyethylene are uniformly mixed and then blow-molded at 180°C.

[0043] The preparation method of aluminum foil sealing film described in the present embodiment is as follows:

[0044] (1) Coating varnish on the surface of the aluminum foil layer and drying to form a varnish layer; coating adhesive on the other side of the aluminum foil layer and drying it at 60°C to form the first glue Adhesive layer; at 75°C, hot-compre...

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Abstract

The invention provides an aluminium foil sealing film and a preparation method thereof and belongs to the technical field of plastic packaging. The aluminium foil sealing film comprises a protective layer, a separation layer and a heat-seal layer, wherein the protective layer is a gloss oil layer or a PET (Polyethylene Terephthalate) film layer; the separation layer is an aluminium foil layer; and the heat-seal layer comprises the materials as follows: 15 to 25 wt% of polybutene, 25 to 35 wt% of ethylene-propylene copolymer and 40 to 60 wt% of HDPE (high-density polyethylene). As a sealing film for the bottle mouth of a polypropylene plastic bottle, the aluminium foil sealing film provided by the invention has the excellent properties of cooking resistance and easiness for uncovering, and when the cooking-resistant temperature is 121 DEG C, the sealing film is unchanged in color and is not stratified. The opening force is 5 to 25 N after the sealing film and the polypropylene bottle are heat-sealed at 200 DEG C, and the heat-seal strength of a heat-seal strip with the width of 15 mm is 5 to 25 N, which shows that the aluminium foil sealing film has the excellent properties of cooking resistance and easiness for uncovering at the same time.

Description

technical field [0001] The invention relates to a sealing film and a preparation method thereof, in particular to an aluminum foil sealing film used for polypropylene bottles, and belongs to the technical field of plastic packaging. Background technique [0002] Aluminum foil sealing film is widely used in the bottle mouth packaging of polypropylene plastic bottles. Aluminum foil sealing film is usually composed of varnish layer or polyethylene terephthalate (PET) film, ink, aluminum foil, polyethylene film or cast polypropylene film, wherein the varnish layer or polyethylene terephthalate The polyester (PET) film is the outer layer, which is used as the protective layer of the sealing film to protect the ink layer in the sealing film, and the polyethylene film or cast polypropylene film is the inner layer, which is used as the heat-sealing layer of the sealing film to generate heat. sealing effect. When the aluminum foil sealing film is prepared, ink is usually applied to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D53/08B32B27/28B32B27/06
Inventor 张文锋曾文明孙国锦杨虎平
Owner ZHEJIANG GOLDSTONE PACKING
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