Abstract: A process for the production of a polymeric film comprising a copolyester having an acid component and a diol component, said acid component comprising a dicarboxylic acid and a sulfomonomer containing a sulfonate group attached to the aromatic nucleus of an aromatic dicarboxylic acid, said process comprising the steps of: (i) melt-extruding a layer of said copolyester; (ii) stretching the extrudate in at least one direction; (iii) heat-setting the film by raising the temperature of the stretched film to a temperature T1 in a first heating zone such that (TM?T1 is in the range of from 5 to 30° C., and then raising the temperature of the film to a temperature T2 in a second heating zone such that (TM?T2 is in the range of from 0 to 10° C.

Abstract: A process for the production of a polymeric film comprising a copolyester having an acid component and a diol component, said acid component comprising a dicarboxylic acid and a sulfomonomer containing a sulfonate group attached to the aromatic nucleus of an aromatic dicarboxylic acid, said process comprising the steps of: (i) melt-extruding a layer of said copolyester; (ii) stretching the extrudate in at least one direction; (iii) heat-setting the film by raising the temperature of the stretched film to a temperature T1 in a first heating zone such that (TM?T1 is in the range of from 5 to 30° C., and then raising the temperature of the film to a temperature T2 in a second heating zone such that (TM?T2 is in the range of from 0 to 10° C.

Abstract: A process for the production of a polymeric film comprising a copolyester having an acid component and a diol component, said acid component comprising a dicarboxylic acid and a sulfomonomer containing a sulfonate group attached to the aromatic nucleus of an aromatic dicarboxylic acid, said process comprising the steps of: (i) melt-extruding a layer of said copolyester; (ii) stretching the extrudate in at least one direction; (iii) heat-setting the film by raising the temperature of the stretched film to a temperature T1 in a first heating zone such that (TM-T1) is in the range of from 5 to 30° C., and then raising the temperature of the film to a temperature T2 in a second heating zone such that (TM-T2 is in the range of from 0 to 10° C.

Abstract: An anti-microbial polymeric film comprising a polymeric substrate layer and an inorganic anti-microbial compound of formula (I): AgaHbAcM2(PO4)3.nH2O wherein: A is at least one ion selected from an alkali or alkaline earth metal ion; M is a tetravalent metal ion; a is in the range 0.4 to 0.5; b and c are positive numbers such that (a+b+mc)=1; m is the valence of metal A; and 0?n?6, wherein the anti-microbial compound is present in the substrate layer in an amount of from about 0.05 to about 0.7% of by weight of the polymeric material of the substrate layer; and the use of said inorganic anti-microbial compound for providing an antimicrobial polymeric film having reduced haze.

Abstract: A method of manufacture of a composite film, and a method of manufacturing an electronic or opto-electronic device, said method comprising the steps of (i) forming a polymeric substrate layer; (ii) stretching the substrate layer in at least one direction; (iii) heat-setting under dimensional restraint at a tension in the range of about 19 to about 75 kg/m of film width, at a temperature above the glass transition temperature of the polymer of the substrate layer but below the melting temperature thereof; (iv) heat-stabilising the film at a temperature above the glass transition temperature of the polymer of the substrate layer but below the melting temperature thereof; (v) applying a planarising coating composition such that the surface of said coated substrate exhibits an Ra value of less than 0.6 nm, and/or an Rq value of less than 0.

Abstract: The use of a heat-stabilized, heat-set oriented film comprising poly(ethylene naphthalate) as a substrate in, or in the manufacture of, an electronic or opto-electronic device containing a conjugated conductive polymer, wherein said film has a shrinkage at 30 mins at 230° C. of less than 1%; and a composite film comprising such a substrate layer and on a surface thereof a barrier layer.

Abstract: The use of a heat-stabilized, heat-set oriented film comprising poly(ethylene naphthalate) as a substrate in, or in the manufacture of, an electronic or opto-electronic device containing a conjugated conductive polymer, wherein said film has a shrinkage at 30 mins at 230° C. of less than 1%; and a composite film comprising such a substrate layer and on a surface thereof a barrier layer.

Abstract: The use of a heat-stabilised, heat-set oriented film comprising poly(ethylene naphthalate) as a substrate in, or in the manufacture of, an electronic or opto-electronic device containing a conjugated conductive polymer, wherein said film has a shrinkage at 30 mins at 230° C. of less than 1%; and a composite film comprising such a substrate layer and on a surface thereof a barrier layer.

Abstract: The use of copolyester of one or more dicarboxylic acid(s), one or more diol(s) and one or more copolymerisable phosphorous-containing flame retardant compound(s) wherein the phosphorus atom(s) are present in the copolyester in a group pendant to the polymer backbone, for the purpose of providing thermal stability and flame retardancy to an article made from said copolyester.