To realize the favorable alignment of glass filaments in longitudinal direction or lateral direction by a method wherein yarn layers, the melting points of which are different from each other, are continuously heated at a temperature, which is lower than the metamorphosing temperature of a material having the melting point lower than that of the other material, and passed on rotary bars and finally compressed.
A glass/polypropylene combined filament yarn fabric cloth 1 is fed from a feeding device A1, passes through a bypass roller 2 and then enters an infrared radiating oven 3. Next, the fabric cloth is covered by a PTFE and heated up to a temperature higher than the melting point of the polypropylene and turns into a locally melted state on a steel bar 4. Thus, wrinkles are removed with the tensions applying on both the bar and fabric cloth. The fabric cloth, in which the glass filaments are orientated, enters twin cylinder type calenders 5, which are kept at a temperature lower than the solidifying point of the polypropylene, resulting in leaving in the state of a composite tape B and cooling at a cooling table 6.
JACQUES BOISROND
JEAN-PAUL DEBARUMU
CHARLES SAINT-JEAN
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