Patent ID: 7820756

Claim:
A polymeric composition suitable for manufacturing heat scalable films or sheets comprising: a. polyethylene terephthalate (PET) in about 80% to 95% by mass of the total composition; b. a polymer additive for lowering the melting point of the composition selected from the group consisting of Polyethylene Naphthalate (PEN), Polytrimethylene Naphthalate (PTN), in-situ formed Polyethylene Naphthalate (PEN) and in situ formed Polytrimethylene Naphthalate (PTN) in about 20% to 5% by mass of the total composition; c. a nucleating agent in about 200 to 1500 ppm by mass of the composition; d. a polycondensation catalyst in about 30 to 300 ppm by mass of the composition; e. a clear fast reheat (CFRH) additive in about 10 to 30 ppm by macs of the composition; f. a color toner in about 0.75 to 25 ppm by mass of the composition; and g. a heat stabilizer in about 20 to 55 ppm by mass of the composition.