| 摘要 |
1,149,087. Coated sheet materials. B. W. NORTHERN TEXTILE PROCESSES Ltd. 16 June, 1967 [21 June, 1966], No. 27654/66. Heading B2E [Also in Division D1] Sheet material having beads or globules of thermoplastic resin adhering to one surface in spaced relationship in a controlled pattern is produced by feeding a base sheet between a roller and a straight bar carrying a row of spaced apart needles, which needles project from the bar towards the roller, supplying the surface of the roller with a coating of a thermoplastic resin composition, reciprocating the bar so that the needles repeatedly penetrate the base sheet without any substantial relative movement between the needles and the sheet in the direction of travel of the latter, whereby the needle points after each penetration of the sheet pick-up resin composition from the roller and on withdrawal through the support sheet leave a row of spaced apart beads or globules of resin composition adhering to a surface of the sheet, and then passing the treated sheet through a drying chamber to gel or cure the resin. The material may be used as a fusible interlining. The needle carrying bar may also be oscillated in a direction transverse to the path of travel of the sheet material whereby the beads or globules left adhering in one row on the support sheet are staggered in relation to the beads or globules adhering to the sheet in the next adjacent row. The base sheet may be woven, of slack open weave or dense close weave, knitted, a non-woven tissue or foamed plastic material. The thermoplastic resin composition may be based on polyvinyl chloride or co-polymers of vinyl chloride with vinyl acetate incorporating a plasticiser. In Fig. 1 sheet material 10 passes between a straight bar 16 carrying a row of needles 17 and a resinapplying roll 18 provided with doctor 19, and then passes through a drying chamber 21. Reciprocal motion is imparted to the needle carrying bar 16 by connection to rods 24 of a self-aligning eccentric 25, the rods sliding in a fulcrum 26. The needle carrying bar is also oscillated in a direction transverse to the path of travel of material 10 by means of a pressure-operated piston and cylinder device, the piston being connected to the end of the bar 16. Driving means for the rolls and parts of mechanism of the apparatus are illustrated in Figs. 2, 3 and 4 (not shown). The sheet material having the applied beads or globules of the thermoplastic resin adhering to one surface thereof can be securely bonded to other sheet material by the application of heat and pressure. By using a brightly coloured resin paste, material having a sequinned appearance may be produced. |
