Random mat, shaped product of fiber reinforced composite material, and carbon fiber mat

A random mat including carbon fibers and a thermoplastic resin, wherein a pressure applied when molding can be reduced and high mechanical strength is obtained when a shaped product of fiber reinforced composite material is formed, is provided. A random mat including carbon fibers having an average...

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Bibliographische Detailangaben
Hauptverfasser:	Hagihara Katsuyuki, Ohki Takeru, Sonoda Naoaki
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G BRAIDING CHEMISTRY COMPOSITIONS BASED THEREON COTTON-WOOL FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR GENERAL PROCESSES OF COMPOUNDING IMPREGNATING OR COATING OF PAPER KNITTING LACE-MAKING LAUNDERING MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL METALLURGY NON-WOVEN FABRICS ORGANIC MACROMOLECULAR COMPOUNDS PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PULP COMPOSITIONS TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G TREATMENT OF TEXTILES OR THE LIKE TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS TRIMMINGS WADDING WORKING-UP
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Beschreibung
Zusammenfassung:	A random mat including carbon fibers and a thermoplastic resin, wherein a pressure applied when molding can be reduced and high mechanical strength is obtained when a shaped product of fiber reinforced composite material is formed, is provided. A random mat including carbon fibers having an average fiber length of from 3 mm to 100 mm and a thermoplastic resin, wherein a fiber areal weight of the carbon fibers is from 25 to 10,000 g/m 2 , a proportion of carbon fiber bundles (A) constituted by single carbon filaments of a critical single fiber number or more defined by the formula (1) to the total amount of fibers in the random mat is from 40 to 99 Vol%, and an average number (N) of fibers in the carbon fiber bundles (A) satisfies the formula (2): Critical single fiber number = 600 / D 2.0 × 10 5 / D 2 ¤ N < 8.0 × 10 5 / D 2 wherein D is an average fiber diameter (µm) of carbon fibers.