Surgery – Respiratory method or device – Ozone or ion generation
Patent
1977-01-21
1979-01-30
Dixon, Jr., William R.
Surgery
Respiratory method or device
Ozone or ion generation
260 336AQ, 260876B, 428 40, 428355, A61F 1316, C08K 501, C09J 702
Patent
active
041366999
ABSTRACT:
The disclosed article (e.g. a sanitary napkin) typically comprises (1) an elongated absorbent pad, (2) an outer covering layer in adherent contact with at least one surface of the pad, (3) an adhesive strip or layer on the exposed surface of the outer layer, and (4) a release liner for protecting the adhesive layer. The adhesive layer is useful for removably attaching the article to the inside of an undergarment or the like. Production of the article can be greatly simplified by using a hot-melt pressure sensitive adhesive (PSA) as the adhesive layer. However, the rubbery base for the hot-melt PSA should be very carefully selected. Two types of rubbery polymers provide good results, i.e. (a) an A-B-A block copolymer having polystyrene end blocks and a rubbery poly(ethylene-butylene) midblock and (b) a radial teleblock copolymer with branches having polystyrene terminal blocks and a butadiene segment in the center. One or both of these rubbery polymers is used to formulate the hot-melt PSA along with a suitable tackifier and a process oil.
REFERENCES:
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patent: 3672371 (1972-06-01), Roeder
patent: 3686107 (1972-08-01), Russell
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patent: 3897783 (1975-08-01), Ginocchio
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patent: 4028292 (1977-06-01), Korpman
Collins James A.
Quinn Thomas H.
Dixon Jr. William R.
H. B. Fuller Company
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