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Polyolefin film capable of sealing repeatedly, composite cover film and preparation method thereof

A polyolefin and film technology, applied in the field of packaging materials, can solve the problems that the cover film cannot be repeatedly sealed well, cannot be sealed relatively flat, and the efficiency of packaging production is affected, so as to achieve smooth hand feeling without frustration, good Effect of mechanical strength and mechanical properties, good barrier properties

Inactive Publication Date: 2019-03-26
浙江保禄包装科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In recent years, bowl-shaped, cup-shaped, barrel-shaped and box-shaped packaging containers have developed rapidly, such as: fresh vegetables, various seasoning sauce packaging, convenient cooked food, Chinese patent medicine packaging, etc. The common feature of such packaging is that they all need to be covered. Membrane materials, at present, the cover film cannot be repeatedly sealed well, and some can only cover a little bit, but cannot be sealed more smoothly
[0003] Resealable food is easy to store and carry, and it is very convenient for consumers to use. However, some existing packaging solutions need to add functional components to achieve resealable effects. This is not only in packaging production In addition, most of these packaging solutions are only suitable for bagged food, and it is difficult to apply to a wider range of products. Based on the above, a composite cover film with a simple structure and resealable properties has been developed. greater practical significance

Method used

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  • Polyolefin film capable of sealing repeatedly, composite cover film and preparation method thereof
  • Polyolefin film capable of sealing repeatedly, composite cover film and preparation method thereof
  • Polyolefin film capable of sealing repeatedly, composite cover film and preparation method thereof

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0035] The invention provides a resealable polyolefin film, comprising:

[0036] The corona layer, the intermediate layer and the heat-sealing layer are stacked in sequence, wherein the thickness ratio of the corona layer, the intermediate layer and the heat-sealing layer is 1:(1-3):1.

[0037] In an embodiment of the present invention, the corona layer includes 100wt% polypropylene random copolymer or 40wt%-100wt% metallocene linear low-density polyethylene (mLLDPE) and 0wt%-60wt% low-density polyethylene (LDPE) The middle layer is 100wt% modified polyolefin-based polymer; the heat-sealing layer includes 0wt%-15wt% metallocene linear low-density polyethylene (mLLDPE) and 85wt%-100wt% low-density polyethylene (LDPE).

[0038] In an embodiment of the present invention, the polyolefin film is co-...

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Abstract

The invention belongs to the technical field of packaging materials, and in particular relates to a polyolefin film capable of sealing repeatedly, a composite cover film and a preparation method thereof. The composite cover film comprises an outer layer, a barrier layer and a polyolefin film. The polyolefin film is composed of a corona layer, an intermediate layer and a hot seal layer. The polyolefin film has good mechanical strength and mechanical property while having good barrier property, not only meets the packaging sealing property, but also is opened conveniently. The polyolefin film can seal repeatedly if being opened, and the using safety is not affected as a result of chips by means of cracking.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and in particular relates to a resealable polyolefin film, a composite cover film and a preparation method thereof. Background technique [0002] In recent years, bowl-shaped, cup-shaped, barrel-shaped and box-shaped packaging containers have developed rapidly, such as: fresh vegetables, various seasoning sauce packaging, convenient cooked food, Chinese patent medicine packaging, etc. The common feature of such packaging is that they all need to be covered. Membrane materials, at present, the cover film cannot be repeatedly sealed well, and some can only cover a little, but cannot be sealed more smoothly. [0003] Resealable food is easy to store and carry, and it is very convenient for consumers to use. However, some existing packaging solutions need to add functional components to achieve resealable effects. This is not only in packaging production In addition, most of these packag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B29/00B32B27/36B32B27/32B32B27/34B32B15/20B32B15/09B32B15/085B32B15/088B32B15/12B32B27/08B32B27/00B32B27/06B32B37/00B32B37/12
CPCB32B15/085B32B15/088B32B15/09B32B15/12B32B15/20B32B27/00B32B27/06B32B27/08B32B27/32B32B27/34B32B27/36B32B29/00B32B37/00B32B37/12
Inventor 李求恩邹文华
Owner 浙江保禄包装科技股份有限公司
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