Self-adhesive wallcoverings

B - Operations – Transporting – 44 – C

Patent

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Details

B44C 5/04 (2006.01) B32B 7/06 (2006.01) B44C 1/17 (2006.01) C09J 7/02 (2006.01) C09J 7/04 (2006.01) D21H 27/20 (2006.01)

Patent

CA 2173847

A wall-covering sheet substrate web comprising in sequence a pressure sensitive adhesive layer, substrate layer, decorative surface layer and a release surface. The web is self-wound into a roll by consecutive winding, the adhesive layer of one winding being received on the release surface of the adjacent winding. The product has an initial adhesion (peel) strength to steel no greater than 7N/25 mm and the adhesion to steel after 24 hours dwell time is at least 5N/25 mm and no greater than 12N/25 mm. The invention also provides a web which can be adhered to a polymer-coated wallcovering. The adhesive layer of the web comprises an adhesive which is plasticizer resistant such that the adhesive retains 70 % of its adhesion strength after contact with a PVC wallcovering at 23 2 °C for 3 weeks.

L'invention concerne une bande support en feuille, pour revêtemen mural, comprenant successivement une couche d'adhésif de contact, une couche support, une couche superficielle décorative et une surface anti-adhésive. La bande s'auto-enroule en spires consécutives sous forme d'un rouleau, la couche adhésive d'une spire venant contre la surface anti-adhésive de la spire adjacente. Le produit selon l'invention présente une force d'adhérence initiale (résistance au pelage) sur l'acier d'au plus 7N/25 mm et l'adhérence à l'acier après un temps de séjour de 24 heures, est d'au moins 5N/25 mm et ne dépasse pas 12N/25 mm. L'invention concerne également une bande qui peut être collée sur un revêtement mural recouvert de polymère. La couche adhésive de la bande comporte un adhésif résistant aux plastifiants de sorte qu'il conserve 70 % de sa force d'adhérence après avoir été mis en contact avec un revêtement mural en PVC à 23 ~ 2 ~C pendant 3 semaines.

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