The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 09, 2023
Filed:
Jun. 10, 2019
Gunze Limited, Ayabe, JP;
Naoki Ohno, Shiga, JP;
GUNZE LIMITED, Kyoto, JP;
Abstract
The present invention provides a heat shrinkable multilayer film that can prevent wrinkles or loosening after attachment when the film is attached to a container as a heat shrinkable label for dry heat shrinking, and a heat shrinkable label including the heat shrinkable multilayer film as a base film. Provided is a heat shrinkable multilayer film including: front and back layers each containing a polyester resin; and an interlayer containing a polystyrene resin, wherein the heat shrinkable multilayer film has a dimensional change in a TD represented by an equation (1) of −55 to −1000 μm as measured by thermomechanical analysis (TMA) in which the temperature of the heat shrinkable multilayer film under a load of 0.10 N is increased from 30° C. to 60° C. at a temperature increase rate of 5° C./min and then cooled from 60° C. to 10° C. at a temperature decrease rate of 5° C./min, the equation (1) being: Dimensional change=dimension in TD at 20° C. −dimension in TD at 60° C. (1).