A kind of aluminum foil sealing film and preparation method thereof

A sealing film and aluminum foil technology, which is applied in the field of aluminum foil sealing film and its preparation, can solve the problems of laborious unraveling, uneven bonding strength, and sealing failure, and achieve the effects of easy peeling, improved quality, and moderate bonding strength

Active Publication Date: 2017-11-14
ZHEJIANG GOLDSTONE PACKING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the purpose of the present invention is to overcome the uneven bonding strength between the aluminum foil sealing film and the mouth of the polypropylene plastic bottle in the prior art, which easily leads to the technical defects of unraveling effort or sealing failure, thereby providing a An aluminum foil sealing film that is evenly bonded between the mouths of plastic bottles, is easy to peel off, and is not easy to open and cause seal failure

Method used

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  • A kind of aluminum foil sealing film and preparation method thereof

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Embodiment 1

[0039] This embodiment provides an aluminum foil sealing film, such as figure 1 As shown, it includes a protective layer 1, a barrier layer 2 and a heat-sealing layer 3 that are laminated sequentially from top to bottom. Among them, the protective layer 1 is a varnish layer, the barrier layer 2 is an aluminum foil layer, and the heat-sealing layer 3 is composed of 15wt% polybutene, 25wt% metallocene LLDPE and 60wt% HDPE (high-density polyethylene).

[0040] The thickness of the protective layer 1 is 16 μm, the thickness of the barrier layer 2 is 7 μm, and the thickness of the heat-sealing layer 3 is 70 μm.

[0041] In this embodiment, the heat-sealing layer 3 is blow-molded by blow-molding equipment at a temperature of 165°C and an extrusion pressure of 50mpa after uniformly mixing the above-mentioned content of polybutene, metallocene LLDPE and HDPE. prepared. Wherein, the melt index of polybutene is 1 g / min, the melt index of metallocene LLDPE is 2 g / min, and the melt inde...

Embodiment 2

[0049] This embodiment provides a kind of aluminum foil sealing film, can refer to figure 1 As shown, it includes a protective layer 1, a barrier layer 2 and a heat-sealing layer 3 that are laminated sequentially from top to bottom. Wherein, the protective layer 1 is a varnish layer, the barrier layer 2 is an aluminum foil layer, and the heat-sealing layer 3 is composed of 25wt% polybutene, 50wt% metallocene LLDPE and 25wt% HDPE.

[0050] The thickness of the protective layer 1 is 12 μm, the thickness of the barrier layer 2 is 30 μm, and the thickness of the heat-sealing layer 3 is 45 μm.

[0051] In this embodiment, the heat-sealing layer 3 is blow molded by blow molding equipment at a temperature of 170°C and an extrusion pressure of 40mpa after uniformly mixing the above-mentioned content of polybutene, metallocene LLDPE and HDPE. prepared. Among them, the melt index of polybutene is 1.5 g / min, the melt index of metallocene LLDPE is 1.5 g / min, and the melt index of HDPE i...

Embodiment 3

[0059] This embodiment provides a kind of aluminum foil sealing film, can refer to figure 1 As shown, it includes a protective layer 1, a barrier layer 2 and a heat-sealing layer 3 that are laminated sequentially from top to bottom. Wherein, the protective layer 1 is a varnish layer, the barrier layer 2 is an aluminum foil layer, and the heat-sealing layer 3 is composed of 20wt% polybutene, 30wt% metallocene LLDPE and 50wt% HDPE.

[0060] The thickness of the protective layer 1 is 7 μm, the thickness of the barrier layer 2 is 50 μm, and the thickness of the heat-sealing layer 3 is 30 μm.

[0061] In this embodiment, the heat-sealing layer 3 is blow molded by blow molding equipment at a temperature of 185°C and an extrusion pressure of 35mpa after uniformly mixing the above-mentioned content of polybutene, metallocene LLDPE and HDPE. prepared. Wherein, the melt index of polybutene is 2 g / min, the melt index of metallocene LLDPE is 1 g / min, and the melt index of HDPE is 0.5 g / ...

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Abstract

The invention provides an aluminum foil sealing film and a preparation method thereof, comprising a protective layer, a barrier layer and a heat-sealing layer compounded sequentially from top to bottom, the protective layer is a varnish layer or a PET film, the barrier layer is an aluminum foil layer, The heat-sealing layer is composed of 15-25wt% polybutene, 25-50wt% metallocene LLDPE and 25-60wt% HDPE. When the aluminum foil sealing film of the present invention is combined with the mouth of a polypropylene plastic bottle, the bonding strength is moderate and uniform, and it is easy to unravel, and it will not occur that the items in the polypropylene plastic bottle hit the sealing film during transportation, and the bonding force is relatively high. Small parts are easy to open, leading to the problem of sealing failure, which greatly improves the quality of aluminum foil sealing film.

Description

technical field [0001] The invention relates to an aluminum foil sealing film and a preparation method thereof, and belongs to the technical field of aluminum foil sealing film and its preparation process. Background technique [0002] Aluminum foil sealing film is widely used in the bottle mouth packaging of polypropylene plastic bottles. The aluminum foil sealing film in the prior art is usually composed of a varnish layer or a PET (polyethylene terephthalate) film, ink, aluminum foil, polyethylene film or cast polypropylene film. Among them, aluminum foil is the middle layer, varnish layer or PET film is compounded on one side of the aluminum foil as the outer layer, polyethylene film or cast polypropylene film is compounded on the other side of the aluminum foil as the inner layer, ink is printed on the varnish layer or The side of the PET film facing the side of the aluminum foil; the function of the outer layer is to protect the ink and aluminum foil, and the function...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65D53/08B32B15/085
Inventor 曾文明张文锋吉娟孙国锦
Owner ZHEJIANG GOLDSTONE PACKING
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