Multilayer polyester container and process for producing the same
AssigneeToyo Seikan Kaisha, Ltd.
InventorsMisa Sasai, Atsushi Kikuchi, Shinichirou Funaoka
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Abstract
A multilayer polyester container comprising inner and outer layers of a polyester resin and at least one intermediate layer of a polyamide resin, wherein in the container body portion, the intermediate layer of the polyamide resin has an exothermic peak starting temperature due to crystallization of not lower than 96° C. as measured by a differential scanning calorimetry, and a clay is dispersed in the polyamide resin, effectively preventing whitening of the intermediate layer even after the passage of time and featuring excellent transparency despite of using, as an intermediate layer, a polyamide resin composition obtained by blending the polyamide resin with the clay.
Claims6
A multilayer polyester container comprising inner and outer layers of a polyester resin and at least one intermediate layer of a polyamide resin, wherein in the container body portion, the intermediate layer of said polyamide resin has an exothermic peak starting temperature due to crystallization of not lower than 96° C. as measured by a differential scanning calorimetry, and a clay is dispersed in said polyamide resin.
A process for producing a multilayer polyester container by biaxially stretch-blow-molding a multilayer preform which comprises inner and outer layers of a polyester resin and at least one intermediate layer of a polyamide resin in which a clay is dispersed, wherein the multilayer preform is biaxially stretch-blow-molded being heated at a temperature of 110 to 120° C. so as to mold a multilayer polyester container in which the intermediate layer of the polyamide resin has an exothermic peak starting temperature due to crystallization of not lower than 96° C. as measured by a differential scanning calorimetry.
Dependencies are inferred from the claim text.