Shaped body made of composite material based on cellulose...

C - Chemistry – Metallurgy – 08 – L

Patent

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C08L 1/12 (2006.01) B27N 3/00 (2006.01) B60R 13/02 (2006.01) B65D 65/46 (2006.01) C08J 5/04 (2006.01) C08L 1/02 (2006.01) B60R 13/08 (2006.01)

Patent

CA 2195023

The invention concerns shaped bodies made of composite material based on cellulose acetate as binder and reinforcing natural cellulose fibres and/or natural cellulosic fibres, characterized in that the cellulose acetate has a degree of substitution (DS) of between approximately 1.2 and 2.7, the shaped body has a Vicat temperature of at least approximately 160 ~C, and the mass ratio of cellulose acetate to natural cellulose fibres and/or natural cellulosic fibres is between approximately 10:90 and 90:10. These shaped bodies are produced in that cellulose acetate is mixed with the natural cellulose fibres and/or natural cellulosic fibres in a mass ratio of between approximately 90:10 and 10:90, in particular 15:85 and 85:15, the total moisture content is set at at least approximately 3 mass %, relative to the total amount of cellulose acetate in the mixture, and the mixture is compressed at a temperature of between approximately 220 and 280 ~C and a pressure of between approximately 30 and 150 bar. The shaped bodies according to the invention can advantageously be used as parts for vehicle interiors, in particular headlining and side linings, as well as packaging material, insulating material or parts of furniture.

L'invention concerne des corps moulés constitués d'un matériau composite à base d'acétate de cellulose comme liant et de fibres cellulosiques naturelles d'armature ou de fibres naturelles contenant de la cellulose. Ces corps moulés sont caractérisés en ce que l'acétate de cellulose présente un degré de substitution DS d'environ 1,2 à 2,7, le corps moulé présente une température Vicat d'au moins environ 160 ~C et le rapport massique de l'acétate de cellulose aux fibres cellulosiques naturelles ou aux fibres naturelles contenant de la cellulose est d'environ 90 : 10 à 10 : 90. Pour produire ces corps moulés, l'acétate de cellulose est mélangé avec les fibres cellulosiques naturelles ou les fibres naturelles contenant de la cellulose dans un rapport massique d'environ 90 : 10 à 10 : 90, notamment 15 : 85 à 85 : 15, la teneur totale en humidité est réglée à au moins environ 3 % en masse, par rapport à la quantité totale d'acétate de cellulose dans le mélange, et le mélange est comprimé à une température d'environ 220 à 280 ~C et une pression d'environ 30 à 150 bars. Ces corps moulés peuvent avantageusement s'utiliser comme garnitures intérieures de véhicule, notamment comme habillage de plafond et garnitures latérales, ainsi que comme matériau d'emballage, matériau isolant ou élément constitutif de meuble.

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