Nitto-denko Corporation

Osamu Ohira

Takashi Kinoshita

Yasuyuki Sasaki

Takahiro Kousaka

Masayoshi Kuniya

A substrate for an adhesive dressing comprising an ethylene/vinyl acetate copolymer having a weight average molecular weight of 1&times;10,to 1&times;10,, a molecular weight distribution of 4.0 or less, a melt flow rate of 3.0 g/10 minutes or less, and a vinyl acetate content of 15 to 28% by weight is provided and a medical adhesive dressing can be prepared by forming a pressure-sensitive adhesive layer on one surface of the substrate. Further, an adhesive tape can be made by arranging a pad for covering and protecting a wounded portion, on a part of a surface of the pressure-sensitive adhesive layer.

Substrate for adhesive dressing, and medical adhesive dressing and adhesive tape using the same

A medical adhesive dressing comprising a polyolefin-based backing film having a medical pressure-sensitive adhesive layer on one surface thereof and a print layer on the other surface thereof, the adhesive dressing having surface properties that cause no wrinkle upon winding and unwinding thereof. For example, the surface of the polyolefin-based film preferably has a surface roughness (10-point average roughness) of 2 to 12 &mgr;m on the side where a print layer is to be formed. The olefin-based film is preferably an ethylene-vinyl acetate copolymer film or a three-layer film comprising an ethylene-methyl methacrylate copolymer layer/A-B-A type block copolymer layer/ethylene methyl methacrylate copolymer layer. It is used for application to skin as a first-aid adhesive tape, large-size adhesive tape, dressing, or draping used in the field of medical and hygiene fields. It can provide medical adhesive dressing and first-aid adhesive tape whose surface causes no printing failure.

Growing community of inventors

Ibaraki, Japan

Osamu Ohira