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Laminate of aramid paper sheet and polyimide film and method for producing same

A technology of polyimide film and manufacturing method, applied in chemical instruments and methods, paper/cardboard layered products, papermaking, etc., can solve problems such as being unsuitable for continuous processing of large sheets

Active Publication Date: 2018-11-09
DUPONT TEIJIN ADVANCED PAPERS JAPAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, plasma processing requires dedicated processing equipment and is not suitable for continuous processing of large wafers

Method used

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  • Laminate of aramid paper sheet and polyimide film and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] (raw material preparation)

[0062] A fibrid body of poly-m-phenylene isophthalamide was produced using a pulp particle production apparatus (wet-type precipitator) constituted by a combination of a stator and a rotor described in JP-A-52-15621. This was processed in a mill, beater to adjust the length-weighted average fiber length to 0.9 mm. On the other hand, meta-aramid fiber (meta-aramid fiber, NOMEX (registered trademark), monofilament fineness: 2.2 dtex) manufactured by DuPont was cut to a length of 6 mm, and used as a raw material for papermaking.

[0063] (Manufacture of aramid paper)

[0064] The above-prepared aramid fibrids and aramid short fibers were each dispersed in water to prepare a slurry. These slurries are mixed so that the aramid fibrids and aramid short fibers have a mixing ratio (weight ratio) of 1 / 1, and then the liquid is sent to a fourdrinier type paper machine for dehydration , squeezed water, dried and coiled to obtain aramid paper.

[00...

Embodiment 2

[0076] The aramid paper and two polyimide films obtained in Example 1 were cut into A4 size, and laminated with the aramid paper sandwiched between the two polyimide films to prepare Prelaminate. Using a calendering device with metal calender rolls, the prelaminate was subjected to heat and pressure processing at a temperature of 300°C and a linear pressure of 300kgf / cm to obtain a polyimide film-aromatic polyamide film. Three-layer laminate of amide paper-polyimide film. The main characteristic values ​​of the insulating member thus obtained were evaluated in the same manner as in Example 1. The results are shown in Table 1.

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Abstract

Provided is a method for producing a laminate, which comprises lamination of an aramid paper sheet and a polyimide film by applying heat and pressure thereto at a temperature of 275-320 DEG C at a pressure of 50-400 kgf / cm. According to the present invention, an aramid paper sheet and a polyimide film are able to be laminated by an easy process without deteriorating the characteristics of the aramid paper sheet and the polyimide film, thereby enabling the production of an aramid paper sheet-polyimide film laminate that has excellent heat resistance, electrical characteristics, chemical resistance, mechanical characteristics and the like.

Description

technical field [0001] The present invention relates to an aramid paper-polyimide film laminate excellent in heat resistance, electrical properties (electrical insulation properties), chemical resistance, mechanical properties, etc. An aramid paper-polyimide film laminate useful as an insulating material for electric and electronic equipment, and a method for producing the same. Background technique [0002] Conventionally, molded articles made of heat-resistant polymers have been used in the field of electrical insulation requiring heat resistance. In particular, molded products using aromatic polyamide (hereinafter referred to as aramid) are excellent industrial materials with heat resistance, chemical resistance, and flame retardancy derived from the molecular structure of aromatic polyamide. . Among them, paper composed of polym-phenylene isophthalamide fibrids and fibers (trade name NOMEX paper (registered trademark)) is widely used as an electrical insulating paper e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/34B29C65/02D21H27/30
CPCD21H27/30B29C65/18B29C66/1122B29C66/45B29C66/71B29C66/712B29C66/73117B29C66/73521B29C66/83413B29C66/91421B29C66/919B29C66/91941B29C66/91943B29C66/929B29C66/73132B32B37/0053B32B37/06B32B2037/0092B32B2307/206B32B2307/306B32B2309/02B32B2309/12D21H13/26D21H25/04B32B2250/02B32B2307/732B32B27/281B32B2457/08B32B2307/718B32B2307/3065B32B2457/00B32B2307/546B32B2307/714B32B27/10B32B29/005B32B2250/40B32B2250/03B32B2262/0269B29K2079/08B29K2077/10B32B5/02B32B5/24B32B27/12B32B37/10B32B38/0008B32B27/34B29C65/44B29C65/02B32B2250/24
Inventor 浮谷孝一藤森龙士成濑新二近藤千寻田中康纪
Owner DUPONT TEIJIN ADVANCED PAPERS JAPAN
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