Stampable reinforced thermoplastic sheet and articles obtained from said sheet
AssigneeElf Atochem S.A.
InventorsGilles Cognet, Regis Jacquemet, Veronique Lamblin
Life of this patent
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Abstract
Stampable reinforced thermoplastic sheet, at least one face of which comprises, from the outside to the inside, at least three successive layers abc, in which: a is a matrix comprising a thermoplastic resin reinforced by at least two fillers of different nature and/or type chosen from fillers of the lamellar type and of the spherical or substantially spherical type, b is an interfacial binder chemically compatible with the thermoplastic resin of a and having, with respect to the latter, a lower viscosity at the temperatures at which the sheets are produced and used, and c is a reinforcement comprising a needled glass mat. Articles obtained from the sheets by stamping.
Claims22
Stampable reinforced thermoplastic sheet, at least one face of which comprises, from the outside to the inside, at least three successive layers abc, in which:
- a is a matrix comprising a thermoplastic resin reinforced by at least two different fillers selected from the group consisting of lamellar type fillers, spherical fillers, and substantially spherical type fillers, the viscosity of the matrix, measured using a capillary viscometer, at the temperatures at which the sheets are produced and used, and at a shear rate of 20 s.sup.-1, being between 450 and 2000 Pa.s;
- b is an interfacial binder chemically compatible with the thermoplastic resin of the matrix a, the viscosity of which, measured under the same conditions as that of the matrix a, is between 10 and 350 Pa.s, and
- c is a reinforcement consisting of a needled glass mat.
Dependencies are inferred from the claim text.