Stock material or miscellaneous articles – Structurally defined web or sheet – Including components having same physical characteristic in...
Patent
1978-06-30
1980-02-12
Herbert, Jr., Thomas J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including components having same physical characteristic in...
428218, 428343, 428354, 428516, 428910, B32B 702
Patent
active
041884426
ABSTRACT:
An adhesive tape is provided which comprises a base paper material having a thickness of 30 to 150 g/m.sup.2, a film of high density polyethylene having a density of not less than 0.94 g/cc elongated at least six times only transversely to the longitudinal direction of the tape and having a thickness of 15 to 30.mu., said elongated film being attached to one side of said base paper material with a first layer of low density polyethylene of a thickness of 7 to 50.mu. being extruded between the base paper material and the elongated film, a second layer of low density polyethylene of a thickness of 7 to 50.mu. being extruded and attached to said elongated film so that the elongated film is sandwiched between the first and second layers of low density polyethylene, and a layer of pressure sensitive adhesive applied to the other side of said base paper material. The adhesive tape has a high tensile strength against a force applied in a direction transverse to the longitudinal direction of the tape. Nevertheless, the tape can be easily torn or cut by user's hand or hands exactly transversely to the longitudinal direction of the tape without being torn zigzag or in a slanting direction.
REFERENCES:
patent: 3088848 (1963-05-01), Tritsch
patent: 3118534 (1964-01-01), Groff et al.
patent: 3620366 (1971-11-01), Parkinson et al.
patent: 3936565 (1976-02-01), Good
patent: 4022646 (1977-05-01), Casey
Asakura Hiroshi
Chimura Ippei
Fuse Shirou
Kaneko Yoshiyuki
Kitazume Keisuke
Herbert, Jr. Thomas J.
Sutton Paul J.
Toyo Kagaku Kabushiki Kaisha
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