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A New Concept in the Use of Perforated Beams in Textile Treatments
Author(s) -
MARSHALL W. J.
Publication year - 1966
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1966.tb02712.x
Subject(s) - textile , water repellent , beam (structure) , pulp and paper industry , process engineering , water soluble , computer science , environmental science , materials science , waste management , composite material , chemistry , engineering , structural engineering , organic chemistry
Presented at a Symposium on ‘Processing Textiles on Perforated Beams in the Dyehouse’ held by the Manchester Region at the Manchester College of Science and Technology, on 26th March 1965, Mr F. V. Davis in the chair The full exploitation of the pad–batch process of dyeing cotton–with reactive dyes has hitherto been retarded by limitations in simple equipment for washing–off unfixed dye. This paper shows that, contrary to general belief, only small amounts of water and low flow rates are necessary, provided that sufficient time is allowed and interchange between liquor and fabric is high. A simple means for meeting these requirements is described. It consists of batching the padded material onto a perforated beam, on which it is stored for the required reaction time; unfixed dye is then washed–off by passing water slowly through the beam and running the eluant liquor to waste without recirculating. This procedure works well in practice: 5000–m batches are washed–off in 20–30 min, the water consumption being about 10 l. /kg of material, which is only about 20–50 % of the minimum wash–water requirement in conventional equipment. The significance of beam diameter in relation to batch size is discussed. The equipment is cheap in capital, labour, and running costs.