Process for producing interior trims for transport means and...

C - Chemistry – Metallurgy – 08 – J

Patent

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Details

C08J 5/04 (2006.01) B29C 44/12 (2006.01) B32B 5/24 (2006.01) B32B 27/12 (2006.01) B60N 3/04 (2006.01) C08J 9/00 (2006.01)

Patent

CA 2172154

A process is disclosed for producing interior trims for transport means, in particular motor vehicles, that consist of a bearing dimensionally stable part and of a decorative part that forms the visible side of the interior trim. The bearing, dimensionally stable part is made of plastic materials stiffened by reinforcing inserts. In order to considerably improve the process, the plastic materials consist of natural or recycled polyols and isocyanates and a material made of natural fibres is used for the reinforcing inserts. The material made of natural fibres is laid into a heatable (foaming) mould whose shape corresponds to that of the interior trim to be produced, the reactive, foamable polyurethane mixture is injected into the mould at a dosing pressure from 100 to 300 bars, then foamed and hardened in the mould at a reaction pressure form 3 to 300 bars.

L'invention concerne un procédé de fabrication de garnitures intérieures de moyens de transport, notamment de véhicules à moteur, constituées d'une partie porteuse indéformable et d'une partie décorative qui forme la face visible de la garniture intérieure. La partie porteuse indéformable est constituée d'une matière plastique renforcée par des couches de renforcement. Afin d'améliorer considérablement le procédé, les matières plastiques utilisées sont des polyols et des isocyanates naturels ou recyclés et on utilise un matériau constitué de fibres naturelles pour former les couches de renforcement. Le matériau constitué de fibres naturelles est placé dans un moule chauffable de moussage dont la forme correspond à celle de la garniture intérieure que l'on veut produire, puis on introduit le mélange réactif moussant de polyuréthanne dans le moule sous une pression de dosage comprise entre 100 et 300 bars et on le fait mousser et durcir dans le moule sous une pression de réaction de 3 à 300 bars.

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