Abstract: A coating compositions for providing substrates with oxygen barrier properties is disclosed. The substrate may be, for instance, a film, such as a polyester film. The coating composition includes a copolymer of maleic acid and acrylic acid and a copolymer of vinyl alcohol and a vinylamine. The barrier coating formed from the coating composition is typically less than about 1 micron in thickness and provides reduced oxygen transmission even at relatively high relative humidities.

Abstract: A metallized film and a process for making the film are disclosed. In general, the metallized film includes a polymeric film layer that is coated with a polyester coating composition. A metal layer is then formed on top of the polyester coating. The polyester coating acts as a tie layer between the metal layer and the underlying film. The polyester film composition may be formed from, in one embodiment, isophthalic acid, a sulfomonomer, and 2-methyl 1,3-propane diol. The above diol has been found to improve adhesion between the metal layer and the polymeric film layer.

Abstract: The present invention provides a coated polymer film having heat seal properties. The heat seal coating includes a propylene diol copolyester. Preferably, the copolyester is formed from 1,3-propane diol, isophthalic acid and a sulfomonomer. A method of heat sealing using this coated film is also disclosed.

Abstract: The present invention provides a coated polymer film having heat seal properties. The heat seal coating includes a propylene diol copolyester. Preferably, the copolyester is formed from 1,3-propane diol, isophthalic acid and a sulfomonomer. A method of heat sealing using this coated film is also disclosed.