Method for making automotive headliners

Details Method for making automotive headliners Method for making automotive headliners

C - Chemistry, Metallurgy

08

G

C08G 18/48 (2006.01) B29C 44/12 (2006.01) C08J 9/00 (2006.01)

Patent

CA 2633867

Vehicle headliners are prepared with a core layer of a fiber-reinforced polyurethane foam. The polyurethane foam is prepared from a polyure thane- forming composition that uses water as a blowing agent and polyol or polyol mixture that has a high functionality and an average hydroxyl equivalent weight of 100-130. The selection of polyols permits cycle times to be reduced by allowing for faster demolding and shortened aging times before post-molding heat lamination steps can be performed.

L~invention concerne des garnitures de toit pour véhicules préparées avec une couche centrale d'une mousse de polyuréthane à renfort de fibres. La mousse de polyuréthane est préparée à partir d~une composition formant un polyuréthane utilisant de l~eau comme agent gonflant et d'un polyol ou d'un mélange de polyol ayant une fonctionnalité élevée et un poids équivalent d'hydroxyle moyen compris entre 100 et 130. Le choix des polyols permet de réduire la durée du cycle en permettant un démoulage plus rapide et des durées de vieillissement raccourcies avant de réaliser les étapes de laminage à chaud suivant le moulage.

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