Heat-shrinkable plastic element, composite preform, and composite container

Abstract

A heat-shrinkable plastic element that can notably improve insertability of a preform is provided. The heat-shrinkable plastic element is disposed on at least part of the outside of a preform, the preform including a mouth part, a body part linked to the mouth part, and a bottom part linked to the body part, the heat-shrinkable plastic element including: at least a layer containing (A) an ionomer resin and (B) an olefin resin as essential constituents, wherein the heat-shrinkable plastic element has a storage modulus at 25° C. of at least 4.0×108 Pa, and the dynamic friction coefficient between the heat-shrinkable plastic element and the preform is at most 1.1.

Dependencies are inferred from the claim text.