Ultrasonically-sealable peelable seal
US4521467A · kind A · utility
56Cited by
5References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 12, 1983 |
| Grant date | Jun 4, 1985 |
| Priority date | — |
| Expiry date | Dec 12, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31928
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A packaging material has a peelable seal and a sealing of resin which is ultrasonically-sealable, but not readily heat-sealable backed by a backing layer of resin having a higher melting point than the sealing layer. The interlayer adhesion between the backing layer and the sealing layer is below the strength required to break the sealing layer. The thickness and material of the sealing material is utilized to control the seal strength of the peelable end seal of the package.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.