| 摘要 |
1,172,004. Surgical dressings. KENDALL CO. 1 May, 1967 [2 May, 1966], No. 20049/67. Heading A5R. A unitary self-adherent dressing for a wound comprises pressure sensitive adhesive in the form of a discontinuous layer either adherent to one face of an intermediate sheet the other face of which is adjacent an absorbent layer, see Figure 2 (not shown), or directly adherent to an absorbent layer, see Figure 3 (not shown), the adhesive constituting part of the wound-contacting surface of the dressing thereby to provide a surface non-adherent to wounds but adherent to adjacent skin areas. If present in the dressing, the intermediate sheet, which is in a form through which body fluids are able to pass, may be in the form of a film and preferably has apertures therein which are directly opposed to discontinuities in the layer of adhesive, portions of the absorbent layer thus being exposed through the intermediate sheet and layer of adhesive. As illustrated in Figure 4, the dressing 30 comprises an adhesive layer 31 adherent to an intermediate sheet 33 which extends over both major faces and two side edges of an absorbent layer 32 the two end edges of which are uncovered, the adhesive layer and the adjacent major face of the intermediate sheet having coincident apertures 34 therein. As illustrated in Figure 6 (not shown), the exposed surface of the adhesive may be covered by two centrally-overlapping removable protective liner sheets; alternatively, as illustrated in Figure 7 (not shown), the adhesive is covered by one removable protective liner sheet having a projecting unadhered portion to facilitate its removal, the complete dressing being packaged in an envelope sealed at its side edges and transversely to provide peelable seals. The latter package may be sterilized by steam or dry heat sterilization, by chemical gas (for example ethylene oxide) sterilization, or by electron beam sterilization. The adhesive may be a rubber base pressure sensitive adhesive; a polymeric acrylate-containing pressure sensitive adhesive, or a polymeric vinyl ether-containing pressure sensitive adhesive; a suitable composition for each of these three types of adhesive is given in the Specification. The absorbent layer may include a structure which has been non-woven, woven, knitted, netted, foamed, accreted or otherwise formed into an integrated fabric layer; alternatively, the absorbent layer may include non-integrated cellulosic fibres, for example fine fibres of wood pulp. The intermediate sheet, if present in the dressing, may be a smooth integrated perforated sheet of, for example, a polymeric film, a paper or a metallic foil. Apparatus for producing a dressing comprising adhesive layer, perforated intermediate sheet and absorbent layer is described and illustrated in the specification. |
