Recherche dans les collections de brevets nationales et internationales
Une partie du contenu de cette demande n'est pas disponible pour le moment.
Si cette situation persiste, contactez-nous auObservations et contact
1. (WO1990006397) FEUTRES POUR MACHINES A PAPIER
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

CLAIMS
1. An article of paper machine clothing formed from a fibrous material having a woven base and an optional batt layer attached thereto characterised in that said fibrous material comprises fibres of
poly(undecanoamide) (polyamide 11) formed by the extrusion of a melt of polyamide 11 having an intrinsic viscosity of at least 1.0 dl/gram.

2. An article as claimed in claim 1 characterised in that the melt on extrusion contains 0.2 to 1.0% by weight of an anti-oxidant.

3. An article as claimed in claim 1 or claim 2 characterised in that the anti-oxidant is selected from one or more of alpha-tocopherol, condensation products of diphenylamine and acetone, condensation products of diphenylamine and compatible phenolic stabilisers with amide functionality.

4. An article as claimed in claim 2 or claim 3 characterised in that the anti-oxidant is present in an amount of 0.4 to 0.7% by weight.

5. A press felt as claimed in any preceding claim characterised in that said fabric comprises
a woven base and
a batt fibre structure attached thereto, said batt fibre structure comprising fibres of poly(undecanoamide) formed by extrusion of a melt having an intrinsic viscosity of at least 1.0 dl/gram and a fibre ranking after one million compressions in the compression test herein described of less than 3.6.