Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
1977-03-24
1979-01-16
Silverman, Stanley S.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
264210R, 264DIG47, 428134, 428343, B32B 330
Patent
active
041350235
ABSTRACT:
A melt-embossed polymer film with primary parallel grooves on one surface and secondary parallel grooves on the other surface such that the combined tapes of the grooves is at least substantially equal to the film thickness, the two sets of grooves being located at an angle to each other of not less than 30.degree., is stretched at right angles to the direction of the primary grooves by a small amount to give a perforate product which can be formed into strips tearable longitudinally or transversely and thus useful as a vapor-permeable substrate for adhesive-coated tape.
REFERENCES:
patent: 3875648 (1975-04-01), Bone
Herbert Peter J.
Lloyd Ronald
Murphy William O.
Patchell Albert G.
Conlin David G.
Goldberg Robert L.
Silverman Stanley S.
Smith & Nephew Plastics Ltd.
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