Pressure-sensitive adhesive tape

Details Pressure-sensitive adhesive tape Pressure-sensitive adhesive tape

1986-01-31

1988-09-06

Herbert, Thomas J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Adhesive outermost layer

428 40, 428352, 525240, 604389, 604390, C09J 702, A61F 1316

Patent

active

047692839

ABSTRACT:
Normally tacky, pressure-sensitive adhesive tapes which are soft, pliable, conformable, and heat sealable are provided. The tapes have a backing of a substantially untensilized, tough, ductile film, the film being a blend of crystalline isotactic polypropylene and a compatible ethylene-based polymer, and a normally tacky, pressure-sensitive adhesive on one side of the film. The films have a longitudinal secant modulus of less than 3700 kg/cm.sup.2, a transverse secant modulus of less than 3700 kg/cm.sup.2, a longitudinal elastic modulus of less than 5200 kg/cm.sup.2, a transverse elastic modulus of less than 5200 kg/cm.sup.2, a longitudinal stiffness of less than 1.7, and a transverse stiffness of less than 3.0.

REFERENCES:
patent: 3630201 (1971-12-01), Endres
patent: 3700614 (1972-10-01), Schenkerberg
patent: 3853595 (1974-12-01), Pedginski et al.
patent: 3937221 (1976-02-01), Tritsch
patent: 3941859 (1976-03-01), Batluk et al.
patent: 3993826 (1976-11-01), Butler et al.
patent: 4036912 (1977-07-01), Stricharczuk
patent: 4087485 (1978-05-01), Huff
patent: 4237889 (1980-12-01), Gobran
patent: 4461872 (1984-07-01), Su

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