GRANULAR CARBON-FIBER-CONTAINING PHENOL RESIN MOLDING MATERIAL AND MOLDED PRODUCT THEREOF

GRANULAR CARBON-FIBER-CONTAINING PHENOL RESIN MOLDING MATERIAL AND MOLDED PRODUCT THEREOF

PROBLEM TO BE SOLVED: To provide a granular carbon-fiber-containing phenol resin molding material which can give carbon-fiber-reinforced phenol resin moldings having high rigidity, especially high bending modulus and excellent dimensional accuracy when injection-molded or transfer-molded. SOLUTION:...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: YAMAO SHUHEI, TSUKAMOTO MASAKAZU
Format: Patent
Sprache:eng
Schlagworte:
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
GENERAL PROCESSES OF COMPOUNDING
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
WORKING-UP
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a granular carbon-fiber-containing phenol resin molding material which can give carbon-fiber-reinforced phenol resin moldings having high rigidity, especially high bending modulus and excellent dimensional accuracy when injection-molded or transfer-molded. SOLUTION: This material is prepared by pre-kneading a mixture comprising 50-80wt.% carbon fibers, specified amounts of additives such as a mold release, a curing agent and a colorant and 20-40wt.% phenol resin with a kneader at low temperature, kneading the product of pre-kneading with an even-speed two-roll mill for a short time at a relatively high temperature and grinding the product of kneading. The length of the carbon fibers in the material should be 0.5-1.0mm.