Printer ribbon and film used for preparation thereof
AssigneeShowa Denko K.K.
InventorsMakoto Karatsu, Sumio Goto
Life of this patent
Estimating the term…
Abstract
Disclosed is a film for a printer ribbon, which is made of a resin composition comprising, 55 to 95% by weight of high-density polyethylene and 5 to 45% by weight of low-density polyethylene and having a melt tension of at least 1.4 g and a density of 0.94 to 0.96 g/cm.sup.3. The film is made by the T-die-chill roll method wherein a good stability at both ends of the extruded molten resin film is maintained to prevent the occurrence of an uneven thickness or formation of wrinkles, and wherein undesirable engulfment of air between the molten resin film and the chill roll is avoided.
Claims5
A film for a printer ribbon, which is made of a resin composition comprising, 55 to 95% by weight of high-density polyethylene and 5 to 45% by weight of low-density polyethylene and having a melt tension of at least 1.4 g but smaller than 3.5 g and a density of 0.94 to 0.96 g/cm.sup.3, said film having a thickness of 8 to 20 .mu.m.
A printer ribbon comprising a substrate film and a printing ink coating formed on the film, said film being made of a resin composition comprising 55 to 95% by weight of high-density polyethylene and 5 to 45% by weight of low-density polyethylene and having a melt tension of at least 1.4 g but smaller than 3.5 g and a density of 0.94 to 0.96 g/cm.sup.3, and said film having a thickness of 8 to 20 .mu.m.
Dependencies are inferred from the claim text.