GB914052A - Process and apparatus for the treatment of textile goods made from synthetic yarn material - Google Patents

Abstract

<PICT:0914052/IV (b)/1> <PICT:0914052/IV (b)/2> A process for the treatment of textile goods made from synthetic yarn material comprising a plurality of strands includes conveying the goods in a freely suspended state through a shrinking bath p without change of position in relation to the direction of the path, the goods remaining completely submerged, and then conveying the goods through at least one bath containing liquid capable of stopping the influence of the shrinking liquid. The Figures show, diagrammatically, apparatus for carrying out the process. 1 is a shrinking vessel containing, for example, a phenol solution; 2 is a neutralising vessel containing, e.g. caustic soda solution and 3 is a rinsing vessel. Goods, in this instance stockings 9, to be treated are placed in readiness on table 10 and attached to hooks 8 on one of several transverse bars 7 supported between a pair of endless chains 4, 5, one on each side of the apparatus. The chains are rotated so that the goods are traversed through the vessel 1 and into vessel 2, and a further bar 7 is brought into the loading position. After loading is completed on the second bar 7 the chains are again moved so that the second load takes up the position in vessel 2 and the first load is transferred to vessel 3. After emerging from vessel 3 the articles are supported on rollers 12 in which position they are unloaded. Before being led into vessel 1 the articles move across wings 14 on a roller 13, the peripheral speed being higher than the speed of the chains, so that the articles are fed into the vessel at a speed higher than that at which they are pulled forward at their front ends. Fig. 5 shows the circulating system of the liquids in vessels 1, 2 and 3. Working feed tank 21 containing shrinking liquid of higher concentration than that in vessel 1 supplies make-up liquid via pipe 20 through an air trap 19 to a transverse perforated pipe 18 to maintain a constant level in vessel 1. Pipe 18 is connected to the suction side of a circulating pump 23 so that the make-up liquid does not flow directly into the bath in vessel 1 but is sucked into the circulating system together with liquid from the bath itself and flows out beneath the baffle 26 from transverse pipe 25. An automatic dosage apparatus 29, controlled from a refractometer or other suitable instrument for determining the concentration of the solution in vessel 1, supplies strongly concentrated solution from feed tank 30 through an air trap 27 to the vessel 1, from time to time to compensate for the drifting of concentration of the bath in vessel 1. 38 and 39 are heaters for heating the solution entering feed tank 21 and vessel 1 respectively. Vessels 2 and 3 in this embodiment contain rinsing water and this is supplied through a conduit 40 to vessel 3 and flows from the latter to vessel 2. Vessels 1, 2 and 3 may be fitted with ultrasonic vibrators 17, 16 and 15 to obtain a more efficient and more uniform influence of the liquids on the textile material.