Double-sided pressure-sensitive adhesive sheet and method for producing the same
US9279069B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2008 |
| Grant date | Mar 8, 2016 |
| Priority date | — |
| Expiry date | Aug 11, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2049
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Provided are a double-sided PSA sheet comprising a PSA layer formed by directly applying an aqueous dispersion-type PSA composition to a non-woven fabric substrate, wherein the layer has a highly smooth surface; and a method for producing the same. In this method, an aqueous dispersion-type PSA composition is applied to at least a first side of the non-woven fabric substrate and the composition is allowed to dry to form a PSA layer. A non-woven fabric of 15 μm to 70 μm in thickness, 0.3 to 0.6 g/cm3 in bulk density, and 0.7 sec to 2 sec in air resistance (Gurley) when measured for 8 layers the non-woven fabric substrate is used as the non-woven fabric substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.