Thermally expandable sheet
US11097565B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2019 |
| Grant date | Aug 24, 2021 |
| Priority date | — |
| Expiry date | Aug 15, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24934
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A thermally expandable sheet includes a base, a thermally expansive layer, and a color adjustment layer. The thermally expansive layer is provided on a first side of the base and includes a thermally expandable material that distends in accordance with an amount of heat absorbed, the heat being generated from a thermal conversion layer that includes a thermal conversion material that converts electromagnetic waves to heat. The color adjustment layer is provided on at least one of the thermally expansive layer and a second side of the base and includes a color adjusting agent. When the thermal conversion layer is provided on the color adjustment layer, the color adjustment layer reduces a visual difference in color between a first region where the thermal conversion layer is provided and a second region where the thermal conversion layer is not provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.