Heat sealing layer, CPP film, preparation method thereof and aluminum-plastic film

A technology of heat sealing layer and core layer, applied in the field of materials, can solve problems such as low heat sealing strength, and achieve the effects of improving impact resistance and transparency, improving low-temperature impact resistance, and improving comprehensive performance.

Active Publication Date: 2018-12-07
ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a heat-sealing layer, CPP film, its preparation method and aluminum-plastic film, so as to solve the problem of low heat-sealing strength of CPP film used in food packaging as the inner layer material of aluminum-plastic film in the prior art

Method used

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  • Heat sealing layer, CPP film, preparation method thereof and aluminum-plastic film
  • Heat sealing layer, CPP film, preparation method thereof and aluminum-plastic film
  • Heat sealing layer, CPP film, preparation method thereof and aluminum-plastic film

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preparation example Construction

[0054] According to another aspect of the present invention, there is also provided a method for preparing the above-mentioned CPP film, which includes the following steps: forming a heat-seal layer 10, a core layer 20, and a composite layer 30 that are sequentially stacked by a multi-layer co-extrusion casting technique, Get as figure 1 CPP film shown. The above-mentioned heat seal layer can make the CPP film have higher heat seal strength, impact resistance and mechanical strength, so that the CPP film can be used as the inner layer of the dry aluminum-plastic composite film, which greatly improves the comprehensive performance of the dry aluminum-plastic film .

[0055] In a preferred embodiment, a multilayer co-extrusion casting method is used to form the heat-sealing layer 10, the core layer 20, and the composite layer 30 that are sequentially stacked. At this time, the above-mentioned preparation method includes the following steps: The first raw material of 10, the secon...

Embodiment 1

[0060] The preparation method of the CPP film provided in this embodiment includes the following steps:

[0061] 70 parts of the first random copolymer polypropylene, 20 parts of the first block copolymer polypropylene and 10 parts of the polyolefin elastomer are used to prepare the heat seal layer, wherein the weight percentage of ethylene in the first random copolymer polypropylene is 7% And the first random copolymer polypropylene is a random copolymer polypropylene with a melting point of 135°C (commercially available), the weight percentage of ethylene in the first block copolymer polypropylene is 15%, and the first block copolymer polypropylene It is a block copolymer polypropylene with a melting point of 155°C (commercially available); the polyolefin elastomer is a propylene-based elastomer (Vistamax, 3000), and the polyethylene content of the polyolefin elastomer is 10wt%;

[0062] 70 parts of the second block copolymer polypropylene, 20 parts of polyethylene copolymer (Leo...

Embodiment 2

[0066] The difference between the preparation method of the CPP film provided in this embodiment and Embodiment 1 is:

[0067] The first random copolymer polypropylene is a random copolymer polypropylene (commercially available) with an ethylene content of 5wt% and a melting point of 140°C. The first block copolymer polypropylene is a copolymer with an ethylene content of 9wt% and a melting point of 160°C. Block copolymer polypropylene (commercially available), the second block copolymer polypropylene is a block copolymer polypropylene with an ethylene content of 7wt% and a melting point of 165°C (commercially available), and the second random copolymer polypropylene is Random copolymer polypropylene with an ethylene content of 5wt% and a melting point of 140°C (commercially available), the third block copolymer polypropylene is a block copolymer polypropylene with an ethylene content of 9wt% and a melting point of 160°C (commercially available ).

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Abstract

The invention provides a heat sealing layer, a CPP (chlorinated polypropylene) film, a preparation method thereof and an aluminum-plastic film. A first raw material of forming the heat sealing layer comprises a first polypropylene randon copolymer, a first block co-polypropylene and a polyolefin elastomer. The melting point range of the first polypropylene randon copolymer is 135-145 DEG C, and the melting point range of the first block co-polypropylene is 155-165 DEG C. According to the heat sealing layer, the CPP film has relatively high heat sealing strength, impact resistance and mechanical strength, so that the CPP film can be used for an inner layer of a dry process aluminum-plastic composite film, and therefore, the comprehensive performance of the dry process aluminum-plastic composite film is improved greatly.

Description

Technical field [0001] The invention relates to the technical field of materials, in particular to a heat-sealable layer, a CPP film, a preparation method thereof, and an aluminum plastic film. Background technique [0002] Flexible packaging lithium batteries have the advantages of good safety performance, light weight, small internal resistance, and flexible shape. They are gradually replacing steel shell and aluminum shell batteries and become the mainstream of the market. The technical core of flexible packaging lithium batteries is its outer packaging material aluminum plastic film . The structure of aluminum plastic film is usually three layers, the outer layer of nylon, the middle layer of aluminum foil and the inner layer of CPP film. [0003] At present, there are two main methods of aluminum-plastic film process: dry process and thermal process. The dry process is that aluminum foil and CPP are laminated by dry compounding with an adhesive. The thermal process is usually...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/20B32B27/32B32B15/085B32B15/20B65D65/40B29C47/06B29L9/00B29L7/00C08L23/14C08L53/00C08L23/16
CPCB65D65/40C08L23/14B32B15/085B32B15/20B32B27/08B32B27/20B32B27/32B29L2009/00B29L2007/00B32B2553/00B32B2307/558B32B2307/31B32B2270/00B32B2250/242C08L2205/03C08L53/00C08L23/16Y02E60/10
Inventor 韩俊刚吴朋李道光邵雪
Owner ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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