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Process for producing sealing film, and sealing film

A manufacturing method and technology of sealing film, applied in sealing materials, chemical instruments and methods, mixed box/shell/package, etc., can solve the problems of melting and deformation of sealing film

Active Publication Date: 2013-07-24
FUJIMORI KOGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during heat sealing, the sealing film may be melted or deformed by the contact of the high-temperature sealing rod or radiant heat because the sealing rod contacts or approaches the exposed portion.

Method used

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  • Process for producing sealing film, and sealing film
  • Process for producing sealing film, and sealing film
  • Process for producing sealing film, and sealing film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～15

[0136] Add resin A and resin B to the hopper of the extruder at the blending ratio shown in Table 1, and extrude it while modifying it to resin C at the extrusion temperature shown in Table 1, and co-extrude at T Examples 1 to 15 of the sealing film 1 were casted and laminated with the resin D extruded from another extruder in the die head.

[0137] In the example in which three layers are written in the layer configuration column of Table 1, resin E was further extruded from another extruder during coextrusion casting to perform coextrusion lamination. Furthermore, in the example where 3 parts are written in the column of coloring agent in Table 1, 3 parts by weight of a PP-based pigment masterbatch was added when preparing resin A and resin B.

[0138] The extrusion temperatures of resin D and resin E were both set to 240°C.

[0139] In the above-mentioned manner, a laminated film with a double-layer structure consisting of the electrode bonding layer 2 of 40 μm and the hea...

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Abstract

A process for producing a sealing film (1) to be interposed between each electrode (11), as a power-generating element, that has been introduced into a bag (20) and the edge of the bag (20), the process comprising: a melt kneading step in which both an acid-modified polyolefin resin A to which a carboxylic acid has been grafted and a resin B having functional groups capable of reacting with the carboxy groups of the resin A are melted and kneaded together to thereby chemically bond the carboxy groups of the resin A to the functional groups of the resin B and convert the resins into a resin C; a heat-resistant-layer formation step in which the resin C is formed into a layer to form a heat-resistant layer (3); an adhesive-layer formation step in which a carboxylic-acid-modified polyolefin resin D is formed into a layer to form an electrode adhesion layer (2) which adheres to electrodes; and a laminating step in which the heat-resistant layer (3) and the electrode adhesion layer (2) are directly laminated to each other when the resin C and / or the resin D is in a molten state.

Description

technical field [0001] The present invention relates to a method for producing a sealing film for sealing electrodes of power generating elements such as secondary batteries and capacitors housed in a pouch, and the sealing film. [0002] This application claims priority based on the Japanese invention patent application with the filing date of November 11, 2010 and the application number of 2010-252940, and its content is incorporated into this application. Background technique [0003] In recent years, secondary batteries and capacitors housed in pouches made of films have been increasingly used as power sources for electronic devices such as notebook computers and mobile phones, or as batteries for hybrid vehicles, fuel cell vehicles, or battery vehicles. [0004] Conventionally, these secondary batteries and capacitors are constructed by sealing a flat power generating element in a flat bag or a stretch-molded bag made of a laminated film formed by laminating a polyolefi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/08H01G11/80H01G11/74H01M50/186H01M50/193H01M50/197
CPCY02E60/12B32B2323/043B32B15/20B32B15/08H01M2/08H01G11/80Y02T10/7022Y02E60/13H01G11/74B32B2457/16Y02T10/70Y02E60/10H01M50/186H01M50/193H01M50/197B32B27/32H01G11/00
Inventor 鹿岛甲介山本史郎小林新一
Owner FUJIMORI KOGYO CO LTD
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