Apparatus and process for the production of pile surface...

Details Apparatus and process for the production of pile surface... Apparatus and process for the production of pile surface...

B - Operations, Transporting

29

D

18/542

B29D 7/22 (1980.01)

Patent

CA 1045323

ABSTRACT OF THE DISCLOSURE A process for the production of pile-surface material which comprises the steps of interposing a thermo- plastic material between a backing and a substantially smooth heated surface, holding the backing against the thermoplastic material so that bonding of the backing to the thermoplastic material and adhesion of the material to the heated surface occurs, parting the thermoplastic material from the heated surface over a bar which provides a curved path having an initial radius of between 1 mm. and 8 mm. so that fibrils are drawn out from the thermoplastic material between the heated surface and the backing and hardening the fibrils as they are drawn out by a stream of cooling fluid. The present process seeks to improve both the uniformity of pile produced by this type of process, to allow uniform piles to be produced at higher speeds than before possible and to provide a versatile process which is readily adaptable to produce varying types of pile.

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