Matsushita Electric Works, Ltd.

Akihiro Atsumi

Yoshihiko Nakamura

Masahiro Matsumura

Yasuo Fukuhara

Yukio Hatta

Masaharu Yamamoto

Kiyohiro Nagao

Makizi Miyao

Shigekazu Takanohashi

Hiroshi Toshima

Takayuki Fukuda

In a process for manufacturing a prepreg for use as an electrically insulating material, a main epoxy resin composition and a subsidiary resin composition containing a hardener which have been separately filtered and metered are quickly mixed into a mixture resin composition, a reinforcing member is coated with a uniformly thin film of the mixture resin composition by a die coater under specific temperature, average residence time and low shear conditions, the coated reinforcing member is heated in non-contact manner by an infrared ray heater to have the member impregnated with the resin composition of the film, the member is further heated in non-contact manner by a floating dryer to have the resin composition semi-hardened, and the member is unified through compaction rolls, whereby the prepreg in the form of a sheet-shaped fiber reinforced composite material is continuously manufactured.

Process for manufacturing prepregs for use as electric insulating

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Yokohama, Japan

Akihiro Atsumi