Pet composition, pet preform, refillable pet bottle and methods for making the same
AssigneeGrupo Petrotemex, S.A. de C.V.
InventorsDavid Eugene THOMPSON, Damian Adrian SALAZAR HERNANDEZ
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Abstract
A polyethylene terephthalate composition (PET), an injection-molded bottle preform made from a PET composition, a refillable PET container blow-molded from the preform, catalyst compositions used for making the PET composition, methods for making the PET composition, methods for injection-molding a PET bottle preform, methods for blow-molding a refillable PET bottle from a preform and methods for improving the rewash stability and recyclability of refillable PET bottles particularly for carbonated soft drinks.
Claims8
1-4. (canceled)
A method for forming a refillable bottle preform, comprising:
- injection molding a polyester resin composition in a mold to form a preform having a maximum wall thickness of 7.5 mm,
- wherein a cavity surface of the mold is at a temperature of from 60 to 90° C.;
- wherein the preform formed by the injection molding has a haze of 10% or less according to ASTM D-1003 at a thickness of more than 4.5 mm;
- and
- wherein the polyester resin composition comprises:
- a polyester resin comprising polycondensed units of one or more dicarboxylic acids and one or more diols, wherein the dicarboxylic acid comprises from 90 mol % to 98 mol % percent of terephthalic acid and the diol comprises from 90 mol % to 99 mol % of ethylene glycol, and at least one of polycondensed isophthalic acid in an amount of 2-5 mol % and cyclohexane dimethanol in an amount of 1 to 3 mol %, and has an intrinsic viscosity of from 0.70 to 0.85 dl/g;
- and
- up to 200 ppm of one or more elemental nucleating metals and up to 100 ppm of one or more non-nucleating metals.
Dependencies are inferred from the claim text.