Faceless pressure-sensitive adhesive construction
US6461707B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1999 |
| Grant date | Oct 8, 2002 |
| Priority date | — |
| Expiry date | Mar 19, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Faceless PSA label constructions of this invention comprise a flexible substrate having a release surface, and a layer of pressure-sensitive adhesive disposed on the release surface. A nonblocking continuous film that, in combination with the pressure-sensitive adhesive is sufficiently self supporting, is disposed over a surface of the layer of pressure-sensitive adhesive to render the pressure-sensitive adhesive tack free. The continuous film is selected from the group of film-forming polymers consisting of polyamide resins, polyester resins, polyurethane resins, polyacrylate resins, vinyl acetate resins and mixtures thereof having a tensile strength of at least 200 psi, and a percent elongation of at least 50. The continuous film can be applied sequentially or simultaneously with the PSA. For purposes of simultaneous application it is desired that the continuous film be formed from a material having a hot melt viscosity that within a factor of about two times a hot melt viscosity for the PSA. The completed faceless PSA label construction is adapted to receive and retain printing or marking indicia directly onto a surface of the continuous film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.