B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/1015
B29C 70/38 (2006.01) B29C 70/50 (2006.01) D04H 3/12 (2006.01)
Patent
CA 1223110
ABSTRACT OF THE DISCLOSURE: A process for preparing thermoplastic polymer sheets reinforced with glass fibres, which comprises the successive steps of: preparing a mat by fall of glass fibres onto a conveyor belt which moves at a speed lower than the fibre feeding speed; preheating the mat to a temperature lower than the polymer melting temperature; deposition on the mat, by fall, of a portion of the required polymer in powder; compression of the mat; deposi- tion on the mat of another portion of the polymer in powder; heating the mat to at least the softening temperature of the polymer; deposition on the mat of the remaining polymer in powder; compression of the mat and of the polymer at a temperature higher by at least 50°C than the polymer melting temperature with formation of a sheet. And a device for carrying out this process.
420360
Ferrari Roberto
Omacini Alberto
Rizzotto Vittorino
Rossi Carlo
Semeghini Gian L.
Montepolimeri S.p.a.
Robic Robic & Associes/associates
Vitrofil S.p.a.
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