Method of producing shaped articles from reinforced composites

Details Method of producing shaped articles from reinforced composites Method of producing shaped articles from reinforced composites

1986-03-12

1988-09-13

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264316, B29C 4302

Patent

active

047708387

ABSTRACT:
A method of shaping a body of thermoformable material containing continuous filaments comprising selecting a shaping polymer material having a glass transition temperature which is greater than the glass transition temperature of the thermoformable material of the reinforced body, locating the reinforced thermoformable body between a pair of sheets of the selected shaping polymer, heating the assembly of reinforced body and shaping polymer sheets to a temperature at which the reinforced material can be formed and the shaping polymer can be stretched and applying a differential pressure preferably of not greater than 10 atmospheres, between opposite sides of the assembly of shaping polymer sheets and thermoformable body to induce a desired shaping of the reinforced thermoformable body and cause rearrangement of the filaments relative to each other. The method permits shaping of composite materials containing continuous fibres and greatly reduces the tendency of the fibres to buckle when the composite is shaped.

REFERENCES:
patent: T857003 (1968-12-01), French
patent: 2978376 (1961-04-01), Hulse
patent: 3140325 (1964-07-01), Graff
patent: 3523149 (1970-08-01), Hartmann
patent: 4478771 (1984-10-01), Schreiber

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