| 摘要 |
1,040,592. Adherent cables. MINNESOTA MINING & MANUFACTURING CO. April 17, 1963 [April 18, 1962], No. 15088/63. Heading H1A. [Also in Division H2] An adherent tape cable comprises a plastics film 11 and a compressible sponge layer 13 bonded together with one or more electrical conductors 12 sandwiched between them and in which the outer surface of the sponge layer has a coating of normally tacky, pressure-sensitive adhesive 15 such that it can be attached to structural surfaces. As shown, the adherent cable may also have an adhesive primer coating 14. In a further embodiment, Fig. 4, not shown, a coating 46 of adhesive is applied between the plastic film, conductor and foam layer to increase the bonding, and the pressure sensitive adhesive is protected by a removable temporary liner 47 e.g. silicon resin treated paper. In a further embodiment, Fig. 5, not shown, the plastic film comprises a tough abrasion-resistant outer layer 51 and an inner bonding layer 58. Fig. 8 diagrammatically illustrates a process and apparatus employed to make this adherent cable, in which a thin plastic film 11 from supply roll 81 passes around a driven rigid metallic squeeze roll 87 having a series of shallow peripheral wire-guiding grooves; wires 12 from a plurality of supply reels 82 press the film into the grooves and adhesive coated temporary liner 85 is drawn around the opposing elastically compressible hard rubber squeeze roll 88. The sponge or foam layer is formed by simultaneous extrusion and expansion from extruder 84 and by contacting the freshly formed hot foam with the plastic film 11 under pressure and at high temperatures it is bonded to the contacting surfaces. The product is withdrawn from the pressure area by pull drum 91, cooled, slit into desired widths at cutter 89, and wound into stock rolls 90. The thickness of the sponge layer is at least three-fourths of the wire diameter and is from 8 to 50 mils. and the thickness of the plastics film is from 3 to 8 mils. The materials which may be used during preparation of the plastics film, the adhesive composition, the primer composition and the foam or sponge composition are given in the Specification, e.g. vinyl resins, polyethylenes, polyesters, polyalkylenes, together with relative thicknesses of each layer and tensile properties of the plastics film, sponge and bonded two-layer composite. A connection block, Figs. 6 and 7, not shown, for use with this cable is also described (see Division H2). |
