Composite base material and adhesive film

Details Composite base material and adhesive film Composite base material and adhesive film

B - Operations, Transporting

32

B

B32B 27/08 (2006.01) C09J 7/02 (2006.01)

Patent

CA 2401317

To provide an adhesive film that can be easily released leaving substantially no adhesive residue and without damaging the adherend surface when released from an adherend. A base material comprising at least a first resin film with a breaking elongation in the lengthwise direction of 300 to 1500% and a breaking strength of at least 2 kg/12 mm, and a second resin film with a lower breaking elongation and a higher flexural modulus than the first resin film is used. The second resin film can break before the first resin film when the base material is stretched.

L'invention concerne un procédé permettant d'obtenir un film adhésif pouvant être facilement retiré sans laisser trop de résidus et sans endommager la surface adhérée lorsqu'il est retiré d'une surface à coller. L'invention concerne également un matériau de base comprenant au moins un premier film de résine présentant un allongement de rupture dans le sens de la longueur de 300 à 1500 % et une résistance à la rupture d'au moins 2 kg/12 mm, et un second film de résine présentant un allongement de rupture inférieur et un module d'élasticité en flexion supérieur à ceux dudit premier film, lorsque le matériau de base est étiré.

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