Claims
- 1. An adhesive tape having particular utility in preparing a sealed container comprising in combination a sheet backing material to one face of which is firmly adherently bonded a smooth, uniform coating of normally tacky and pressure-sensitive adhesive and to the other face of which is firmly adhesively bonded an indicator layer comprising a strong flexible binder matrix having a Young's modulus at 2% elongation of at least about 125,000 pounds per square inch, said binder containing dispersed throughout, a solid, color-forming substance and capsules containing a liquid dye precursor reactable with said color-forming substance.
- 2. The tape of claim 1 where said color-forming solid reactant is nickel rosinate and said liquid color former is a dithiooxamide derivative.
- 3. The tape of claim 1, where said binder contains titanium dioxide dispersed in the indicator layer.
CROSS REFERENCE TO RELATED APPLICATION
This application is a division of copending patent application Ser. No. 397,797, filed Sept. 17, 1973, now U.S. Pat. No. 3,896,965.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3292828 |
Stuart |
Dec 1966 |
|
3516852 |
Janssen et al. |
Jun 1970 |
|
Divisions (1)
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Number |
Date |
Country |
Parent |
397797 |
Sep 1973 |
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