| 摘要 |
<p>A COMPOSITE TACK-FREE FILM HAVING A FILM SUBSTRATE WITH OPPOSING SURFACES, BEARING ON AT LEAST ONE OF SAID SURFACES A HIGHLY CROSSLINKED, FILM-FORMING ACRYLATE COMPOSITION CONTAINING FROM 25 TO 78 OF AT LEAST ONE LOWER ALKYL (METH)ACRYLATE AND FROM 10 TO 60 PERCENT VINYL ACETATE AND AT LEAST ABOUT 1 PERCENT OF A POLAR MONOMER, WHEREIN THE ACRYLATE COMPOSITION IS CAPABLE OF ATTACHING TEMPORARILY TO POLYIMIDE FILM SURFACE TO PROVIDE A SUBSTANTIALLY AIR-TIGHT SEAL AND BEING CLEANLY REMOVABLE FROM SAID POLYIMIDE FILM SURFACE LEAVING NO VISIBLE RESIDUE, EVEN AFTER BEING SUBJECTED TO ELEVATED TEMPERATURES.</p> |
