Document Type and Number:
Japanese Patent JPH0415816
Kind Code:
B2
Abstract:
PURPOSE:To prepare prepreg with a simple and environmental pollution-free process by mixing and extruding molten and solventless thermoset resin with reinforcing base material in an extruder and then semihardening the mixture. CONSTITUTION:Molten thermoset resin (such as phenol resin etc.) is inserted by screw extruders 1, 2 into a sheet die 3 and at the same time reinforcing base material 5 (such as craft paper etc.) is intoduced into the sheet die 3, both are compounded, pulled out of the die lip 6 to obtain resin sheet. Then the composite resin sheet is semi-hardened by infrared heating.
Inventors:
SHIBUYA TAKEFUMI
SUZUKI SHOZO
KAYAMA TAKASHI
USAMI KAORU
OOGANE KENJI
SUZUKI SHOZO
KAYAMA TAKASHI
USAMI KAORU
OOGANE KENJI
Application Number:
JP8724182A
Publication Date:
March 19, 1992
Filing Date:
May 25, 1982
Export Citation:
Assignee:
MITSUI TOATSU CHEMICALS
International Classes:
B29C57/00; B29B11/00; B29B11/16; B29B15/12; B29C70/06; C08J5/04; C08J5/24
Next Patent: JPH0415817