Abstract: A tubular, multilayer film comprises a central barrier layer and a pair of adhesive layers on opposite sides of the central barrier layer. The adhesive layers completely cover the central barrier layer. Opposing edges of the central barrier layer overlap longitudinally along the tubular, multilayer film. The total thickness of the central barrier layers in the overlapping portion is substantially the same as the thickness of the central barrier layer in the non-overlapping portion. The tubular, multilayer film also includes inner and outer surface layers. The inner surface layer extends completely around the interior of the tubular, multilayer film, and the outer surface layer extends completely around the exterior of the tubular, multilayer film.

Abstract: A mechanical fastener. A preferred embodiment of the invention provides a mechanical fastener including engaging stems having heads with demarcation lines. The present invention also provides a method of making a mechanical fastener that includes placing a layer of heated material on stem ends to soften the stem ends and deforming the softened stem ends into convex heads.

Abstract: A multilayer sealant film for use in the medical field at least comprises as its innermost layer a first layer comprising at least one resin selected from the group consisting of linear low-density polyethylene, low-density polyethylene, polypropylene and polybutene-1, and a third layer comprising an ethylene-vinyl alcohol copolymer and laminated to the outer side of the first layer with a second layer serving as an adhesive layer and comprising a resin containing, as a main component, at least one of an amorphous polyolefin, adherent polyolefin and ethylene-vinyl acetate copolymer. The ethylene-vinyl alcohol copolymer forming the third layer functions as a barrier for preventing contaminants from migrating from outside of the third layer toward the first layer (innermost layer). Further, it is possible to improve the formability of the multilayer film since the difference in density between the resin for forming the first layer and the resin for forming the second layer is set to be 0.02 g/cm3 or less.

Abstract: The blow-molded hose of a synthetic resin of the present invention is produced by blow-molding a single parison comprising a soft resin and a hard resin. The blow-molded hose comprises a monolayer (or single-layer) segment formed with either a soft resin layer or a hard resin layer and multilayer (laminating) segment formed with the soft resin layer and the hard resin layer, wherein, in the multilayer (laminating) segment, the thickness of the resin layer forming the monolayer segment is thinner than that of the other resin layer. Practically, the monolayer segment comprises the soft resin layer and forms the connection end (s) at the end (s) of the hose.

Abstract: A process of making a biaxially-oriented multilayer film, comprises extruding a tubular multilayer tape and inflating the tape so that the tape is biaxially oriented by stretching in the transverse direction and machine direction at the same time, so that a tubular multilayer film is formed.