| 摘要 |
<p>1,132,078. Laminated fabrics. E. BOBKOWICZ. 7 Dec., 1965 [8 Dec., 1964], No. 51772/65. Heading B5N. [Also in Division D1] A curtain of thermoplastic resin filaments 2 (e.g. of a polyamide or polyolefin) is extruded from a device 1 and passes to a pair of perforated suction drums 3, 4. Fibrous webs 7, 8 (e.g. of cotton, wool, bast fibres, man-made fibres, rayon or mixtures thereof), are fed between belts 11, 14 to toothed rollers 17, 18 to be broken up and blown by devices 15, 16 through a Venturi 20 and on to the surfaces of drums 3, 4 where they are laid in an even mat. Rotation of the drums brings the mats into pressure contact with the curtain of filaments which is still tacky and by the pressure of the drums 3, 4 and a pair of pressure rollers 21, 22 the filaments and staple fibres are bonded together. The fabric then passes through a slot in a double extrusion head 23 from which comes curtains 24 of filaments to be laid on the fabric in staggered relation to the filaments 2 therein. The filaments and fabric are brought together at the nip of suction drums 25, 26 on which mats of staple fibres are formed. These mats are pressed on to the tacky filaments 24 first by drums 25, 26 and secondly by pressure rollers 39, 40. The fabric is then cooled by drums 41, 42 and wound up at 44. Draft may be applied to the filaments between extruder 1 and drums 3, 4, between extruder 23 and drums 25, 26 or by rolls 21, 22, 39, 40 or drums 41, 42 so that the molecules in the filaments are oriented. The final fabric may be further pressed and stretched. The steps described above may be repeated several times. The fabric may be used in packaging (e.g. as bags) and as backing for linoleum, carpets and rubber-coated upholstery.</p> |
