PURPOSE: To obtain a fiber reinforced structural thermoplastic composite material by using a second polymer containing an amorphous polymer having a glass transition temp. lower than the m.p. of a polymer of a first layer by definite temp. and capable of being crystallized in an annealing process and set so as to have a specific peak crystallization time.
CONSTITUTION: A structural thermoplastic composite material contains a laminate consisting of a first layer of a thermoforming polymer composite material reinforced by fibers containing at least 50 wt.% of reinforcing filaments having a length of 3 mm or more and the adhesion layer of a second thermoforming polymer adapted to the first layer at temp. equal to or higher than the m.p. of the first thermoforming polymer. Herein, the second polymer contains an amorphous polymer having a glass transition temp. lower than the m.p. of the polymer of the first layer by at least 10°C and can be crystallized in an annealing process and further has a peak crystallization time of at least about one min. This laminate structure can be used in the production of a product having merits of a thermoplastic material, for example, damage resistance, environmental resistance and solvent resistance.
FUIRITSUPU ANSONII SUTANIIRAND
FUREDERIKU NEIRU KOGUSUUERU
