Method for judging authenticity and pressure-sensitive adhesive sheet
AssigneeNitto Denko Corporation
InventorsShigeki Watanabe, Masahito Niwa, Yuki Tsubaki
Life of this patent
Estimating the term…
Abstract
An objective is to provide a method for judging the authenticity of a product or component. Provided is a method for judging product or component authenticity. The method includes a step of determining the percentage of radioactive carbon-14 based on ASTM 6866 with respect to at least one constituent that a product or component of interest obtained has. Here, at least one constituent that an authentic product or component has and that corresponds to the constituent of the product or component of interest includes a resin comprising a prescribed percentage of radioactive carbon-14.
Claims9
A method for judging product or component authenticity, the method including:
- a step of determining a percentage of radioactive carbon-14 based on ASTM 6866 with respect to at least one constituent included in a product or component of interest obtained,
- a step of judging the product or component of interest authentic when the constituent of the product or component of interest has a biomass carbon ratio in the range of ±5% of the biomass carbon ratio of the constituent of the authentic product or component, and judging the product or component of interest inauthentic when out of the ±5% range,
- wherein at least one constituent included in an authentic product or component that corresponds to the constituent of the product or component of interest includes a resin comprising a prescribed percentage of radioactive carbon-14,
- the product or component is a pressure-sensitive adhesive sheet,
- the pressure-sensitive adhesive sheet is one of the following:
- (A) a pressure-sensitive adhesive sheet comprising a substrate layer and a pressure-sensitive adhesive layer placed on at least one face of the substrate layer,
- (B) a release-lined pressure-sensitive adhesive sheet comprising a pressure-sensitive adhesive sheet that includes a substrate layer and a pressure-sensitive adhesive layer placed on at least one face of the substrate layer, and further comprising a release liner protecting an adhesive face of the pressure-sensitive adhesive layer, or
- (C) a release-lined pressure-sensitive adhesive sheet comprising a pressure-sensitive adhesive sheet formed of a pressure-sensitive adhesive layer, and further comprising a release liner protecting an adhesive face of the pressure-sensitive adhesive layer;
- and
- among the substrate layer, the pressure-sensitive adhesive layer and the release liner substrate layer, at least one is a constituent that includes a resin comprising a prescribed percentage of radioactive carbon-14.
Dependencies are inferred from the claim text.