Process of making sheet material comprising a substrate web of s

Details Process of making sheet material comprising a substrate web of s Process of making sheet material comprising a substrate web of s

1985-07-19

1986-10-28

Czaja, Donald

Plastic and nonmetallic article shaping or treating: processes

Vacuum treatment of work

264102, 264171, 264173, 2641761, 2641762, 264514, 4251311, 4251331, 425190, 425203, 425204, 425208, 425370, 425404, B29C 3310, B29C 3318

Patent

active

046197990

ABSTRACT:
In a process of making sheet material comprising a substrate web of synthetic thermoplastic material and an adhesive layer consisting of a non-crosslinkable elastomer the elastomeric material is heated above its devolatilization temperature by a feed screw of a screw extruder and is devolatilized through venting means (vent opening and vacuum pump 21) and is subsequently pressurized by a booster 7 to a pressure which is sufficient to overcome the backpressure applied by the succeeding blow head.

REFERENCES:
patent: 3376603 (1968-04-01), Colombo
patent: 3526926 (1970-09-01), Reid
patent: 4127635 (1978-11-01), Gauthier
patent: 4171193 (1979-10-01), Rahlfs

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