Pressure-sensitive adhesive tape
Abstract
Abstract IN THE MANUFACTURE OF PRESSURE-SENSITIVE ADHESIVE TAPE A CARRIER TAPE CONSISTING OF A PLASTIC MATERIAL IS NORMALLY USED, SUCH CARRIER TAPE BEING COVERED AT LEAST ONE SIDE WITH A SUITABLE ADHESIVE LAYER. THE CARRIER TAPE IS NORMALLY MADE OF A SHEET WITH A THICKNESS OF 0.04 MM. WITH A TENSILE BREAKING STRENGTH OF FROM 12 TO 15 KP. AT A WIDTH OF 25 MM. MEASURED AT A DRAW RATE OF 300 MM. PER MINUTE. THE PURPOSE OF THE PRESENT INVENTION IS TO PROVIDE A PRESSURE-SENSITIVE ADHESIVE TAPE HAVING A TENSILE BREAKING STRENGTH IN THE LONGITUDINAL DIRECTION OF AT LEAST 40 KP./25 MM. WIDTH AT 0.05 MM. THICKNESS AND A TRANSVERSE ELONGATION OF AT LEAST 20% ARE OBTAINED, BOTH MEASUREMENTS MADE AT A DRAW RATE OF 300 MM./MIN. IN ACCORDANNCE WITH THE INVENTION THIS IS OBTAINED BY USING A CARRIER TAPE WHICH IS PRODUCED FROM A STRIP OF POLYOLEFINIC SHEET BY SUBJECTING THE STRIP TO A LONGITUDINAL STRETCHING UNDER SUCH CONDITIONS THAT THE TRANSVERSE DIMENSION OF THE STRIP IS SUBSTANTIALLY UNAFFECTED BY THE STRETCHING. D R A W I N G
Inventors
- 👤 Christensen V Fehrn
Bibliographic Details
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |