Method for making a reinforcement frame and sealing membrane...

D - Textiles – Paper – 04 – H

Patent

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D04H 13/00 (2006.01) D04H 1/48 (2006.01)

Patent

CA 2678167

The invention relates to a method for making a non-woven mat to be used as a reinforcement for a frame in a flexible sealing membrane. The method is characterised in that it comprises providing vegetable-origin natural fibres optionally mixed with a minority of thermoplastic or thermofusible fibres, forming a non-woven mat or web by mechanical, pneumatic or hydraulic batting, submitting said web to two successive consolidation operations including a needle punching operation and a binding operation with a chemical binder or by a thermal processing preferably under pressure, and finally submitting the non-woven consolidated web to a process for the hydrophobation of the fibres.

Procédé de fabrication d'une armature de renfort et d'une membrane d'étanchéité comprenant une telle armature et produits obtenus La présente invention a pour objet un procédé de fabrication d'une nappe non tissée destinée à être utilisée comme renfort ou armature dans une membrane d'étanchéité souple. Procédé caractérisé en ce qu'il consiste à fournir des fibres naturelles d'origine végétale, et éventuellement mélangées à des fibres 5 thermoplastiques ou thermofusibles minoritaires, à former un(e) voile ou nappe non tissé(e)par nappage mécanique, pneumatique ou hydraulique, à soumettre ensuite ledit voile à deux opérations successives de consolidation comprenant une opération d'aiguilletage et une opération de liage par liant chimique ou par traitement thermique, préférentiellement sous pression et, 10 enfin, à soumettre le voile non tissé consolidé à un traitement d'hydrophobationde ses fibres.

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