Method of producing pressure-sensitive adhesive sheet

C - Chemistry – Metallurgy – 09 – J

Patent

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C09J 7/02 (2006.01)

Patent

CA 2571510

An adhesive sheet which can prevent or remove a bubble and a blister by a through hole and has a base material surface whereupon the through hole is not easily seen. On an adhesive surface of an adhesive agent layer (12) of a laminated body composed of a base material (11) and the adhesive agent layer (12), CO2 laser beams having a pulse width of 1-140µsec, a pulse energy of 0.01-3.0mJ at a processing point and a beam spot diameter of 30-160µm at the processing point are applied, and through holes (2) having a hole diameter of 0.1-42µm on the surface of the base material (11) are formed at a hole density of 30-50,000 holes/100cm2.

Il est prévu une feuille adhésive susceptible d'empêcher ou d'enlever une bulle et une ampoule par un trou traversant et possédant une surface de matériau de base sur laquelle on ne voit pas facilement le trou traversant. Sur une surface adhésive d'une couche d'agent adhésif (12) de corps stratifié composé d'un matériau de base (11) et de la couche d'agent adhésif (12), on applique des rayons laser CO2 d'une largeur d'impulsion comprise entre 1 et 140µsec, une énergie d'impulsion comprise entre 0,01 et 3,0mJ en un point de traitement et un diamètre de point de faisceau compris entre 30 et 160µm au point de traitement, et des trous traversants (2) d'un diamètre compris entre 0,1 et 42µm à la surface du matériau de base (11) sont formés avec une densité de trous de l'ordre de 30 à 50.000 trous/100cm<2>.

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