| 摘要 |
<p>A coated film base suitable for coating with a light-sensitive photographic emulsion layer comprises a self-supporting film of a synthetic linear polyester and a continuous subbing layer applied to at least one surface of said self-supporting film comprising a water-insoluble copolymer of (a) styrene or a derivative of styrene, (b) a comonomer selected from acrylic acid, methacrylic acid or a derivative of acrylic acid or methacrylic acid and (c) a copolymerizable sulphonated ethylenically unsaturated comonomer having the general structure: <IMAGE> wherein R1, R2 and R3 are the same or different and represent hydrogen, halogen, alkyl, nitrile, amide, amine, ketone, ethyl or vinyl; R4 represents alkylene, carbonyl, naphthylene, substituted naphthylene or vinylene; M represents hydrogen, ammonium, substituted ammonium or an alkali metal and is preferably lithium, potassium or sodium; m represents 1 or 0; n represents an integer 1, 2 or 3 provided that n=1 when m=0, said comonomers (a), (b) and (c) being present in the respective molar percentages in the ranges (a) 33.3 to 90%, (b) 5 to 65% and (c) 1 to 40%. The subbing layer renders the coated film base anti-static. Photographic emulsions adhere strongly to the subbing layer which is preferably subjected to corona discharge treatment before the application of the emulsion.</p> |
