Method and device for the treatment of a synthetic textile fabric or the like, their various applications and articles thus obtained

摘要

1,121,370. Textile treating apparatus. ULTRASONA A.G. 6 Oct., 1965 [12 Oct., 1964], No. 42450/65. Heading D1L. A process for treating a continuous length of synthetic textile fabric to make it softer, less glossy and more voluminous, in which the fabric is subjected to treatment in a strongly attacking shrinking bath, while at the same time being subjected to ultrasonic waves and is immediately thereafter washed with a washing liquid that may contain a neutralizing agent for the shrinking liquid, is characterized in that the fabric is passed through a shrinking bath 1 in a path extending under a perforated conveyor belt 6 immersed in the bath, the speeds of supply and removal of the fabric to and from the bath and the speed of belt 6 being so mutually adjusted that practically no tensile stresses occur in the fabric, and the latter is caused to follow a path of movement extending substantially along the underside of the belt 6. The fabric is fed into the bath from roll 13 by feed rolls 11 and withdrawn over roll 17 and the speeds of rolls 11, depositing roll 12, belt 6 and roll 17 are adjusted accurately relative to one another, depending on the degree of shrinking of the fabric, by means of known continuously variable transmissions and/or separate variable speed motors. Shrinking liquor is fed to the bath 1 by perforated tube 8 extending across bath 1 and discharged through perforated tube 9, these tubes being connected by an external circulating system (Fig. 4, not shown) including pump 41, filter 42 dosage apparatus 43 and heater 44. In the bottom of vessel 1 a battery of ultrasonic oscillators 18 is arranged for emitting ultrasonic vibrations towards the fabric on the lower run of belt 6. After withdrawal from bath 1 the fabric is fed into a neutralising and washing vessel 19 (Fig. 2, not shown) where it is conveyed on the upper surface of belt 25. The vessel 19 is divided by partitions 20 into three collecting tanks 22, 23, 24 with overflow troughs 31-35 arranged above the upper run of conveyor 25. Trough 31 is supplied with cold water and the collected liquor in tank 22 is fed back to trough 32 and so on, the liquor being heated and having a neutralising agent added before it is fed to trough 35 (Fig. 5, not shown).