| abstract |
A process for producing a heat-sealable polymeric film, particularly a heat-sealable peelable polymeric film, comprising the steps of: (a) melt-extruding a substrate layer of polymeric material; (b) stretching the substrate layer in a first direction; (c) optionally stretching the substrate layer in a second, orthogonal direction; (d) optionally heat-setting the stretched film; (e) forming a heat-sealable coating layer on a surface of the substrate by melt-coating directly thereon a molten polymeric material; and (f) cooling the coated substrate, wherein coating step (e) is prior to step (b) or between steps (b) and (c); wherein the thickness of the coating layer is less than about 8ñm; wherein the molten polymeric material of the coating layer comprises a copolyester, and wherein said process optionally further comprises the step of adding water to the polymeric material of the coating layer prior to the coating step, wherein said water is added in an amount in the range of from about 600 ppm to about 2500 ppm by weight of the copolyester of the coating layer; and a heat-sealable polymeric film produced by said process. |