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US 9,005,742 B2Granted
Label for removable attachment to an article
AssigneeSpear Group Holdings Limited
InventorsDavid John Davies, Darren Hammonds
Life of this patent
Estimating the term…
Abstract
A label for removable application to an article such as a beverage bottle includes a backing layer (2) comprising a laminate of a bi-axially oriented polyester such as PET (12) and a bi-axially oriented polypropylene (14). The polyester film (12) has a lower coefficient of thermal expansion than the polypropylene film (14). Consequently, when the label is heated, it will tend to curl and this effect can be used to assist in the removal of the label from the article in a hot washing bath during recycling of the article.
Claims14
A label which is removable from an article when heated, the label comprising:
- a polymeric film backing layer comprising a laminate of a polypropylene film material and another film material having different linear coefficients of thermal expansion;
- and
- an adhesive layer disposed adjacent the polypropylene film for bonding the label to the article,
- wherein the backing layer expands when subjected to heat and a linear coefficient of thermal expansion of the film material nearer to the adhesive layer is not less than double the linear coefficient of thermal expansion of the film material further from the adhesive layer so that the label tends to curl into a curved configuration with the adhesive layer on the outside of the curve.
1 more element
Dependencies are inferred from the claim text.