Veil with a pvoh fibre binding agent

Details Veil with a pvoh fibre binding agent Veil with a pvoh fibre binding agent

D - Textiles, Paper

21

H

D21H 13/16 (2006.01) D21H 13/40 (2006.01) D21H 15/06 (2006.01) D21H 25/04 (2006.01)

Patent

CA 2479360

The invention relates to a method comprising: a step for dispersion of cut filaments and discontinuous fibres of PVOH in an aqueous process liquor, then a formation step for a bed in a formation device by passage of the dispersion over a formation cloth, through which the aqueous process liquor is drained, the filaments and fibres being retained on said cloth, then a thermal treatment step in a curing device. The PVOH fibres give a degree of resistance to the fibre bed in formation. The method provides a veil with a very high degree of tensile strength for a low level of binding agents.

Le procédé selon l'invention comprend : - une étape de mise en dispersion dans une eau de procédé de filaments coupés et de fibres discontinues de PVOH, puis, - une étape de formation d'un lit dans un dispositif de formation par passage de la dispersion sur une toile de formation à travers laquelle l'eau de procédé est drainée, les filaments et les fibres étant retenus sur ladite toile, puis, - une étape de traitement thermique dans un dispositif d'étuvage. Les fibres de PVOH donnent de la solidité au lit de fibres en formation. Ce procédé mène à un voile présentant un niveau de résistance à la traction très élevé pour de faibles taux de liants.

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