PROCESS FOR MANUFACTURING CO-POLYESTER BARRIER RESINS WITHOUT SOLID-STATE POLYMERIZATION, CO-POLYESTER RESINS MADE BY SAID PROCESS, AND CLEAR MONO-LAYER CONTAINERS MADE OF CO-POLYESTER RESINS

摘要

PROBLEM TO BE SOLVED: To provide: a process for producing compositions having improved gas barrier properties; and compositions which contain a polyester, one or more thermoplastic resins and a filler and may be used to form containers improved in resistance to gas permeation.SOLUTION: There is provided a composition that exhibits further improved gas barrier resistance, by producing polymeric resins directly from melt-phase esterification/polycondensation without subsequent solid-state polymerization to form a resin material having intrinsic viscosity and mechanical characteristics desirable for food and beverage container applications, and by mixing the resins, e.g., with fillers and/or other resins to provide further improved resistance to gas permeation.