Pressure sensitive adhesive tapes

Details Pressure sensitive adhesive tapes Pressure sensitive adhesive tapes

1977-02-10

1979-01-30

Ives, P. C.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428339, 428343, 428355, 428356, 428352, 428353, 428354, 428520, 428515, 428516, 428519, 428910, 428433, 215232, 215233, 264288, 264289, B32B 2732, C09J 702

Patent

active

041373626

ABSTRACT:
A pressure sensitive adhesive tape comprising a backing and a pressure sensitive adhesive layer, wherein the backing is produced by stretching a long sheet composed of polypropylene as a main component in the substantially transverse direction, the backing having the properties that the shock edge tearing resistance is below 200g, the elongation at break is above 200% in the lengthwise direction, the tensile strength is above 170 kg/cm.sup.2 in the lengthwise direction and above 800kg/cm.sup.2 in the transverse direction and the impact strength is above 15kg.cm/mm.sup.2 in the lengthwise direction and above 40kg.cm/mm.sup.2 in the transverse direction, and the backing having a thickness of about 10 to 300 microns.

REFERENCES:
patent: 3241662 (1966-03-01), Robinson et al.
patent: 3271495 (1966-09-01), Gronholz et al.
patent: 3372049 (1968-03-01), Schaffhausen
patent: 3732122 (1973-05-01), Fehrn-Christensen
patent: 3758661 (1973-09-01), Yamamoto et al.
patent: 3816584 (1974-06-01), Schmidt
patent: 3887745 (1975-06-01), Yoshi et al.

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