PHYSICAL PROPERTIES OF COTTON FABRICS FINISHED WITH SILICONE WATER-REPELLENTS
1966 Volume 22 Issue 10 Pages 459-465
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1966 Volume 22 Issue 10 Pages 459-465
Recently a new method was found by authors in silicone water-repellent finishing of cotton fabric. This procedure consists of treating cotton with methyl hydrogen polysiloxane-cetyl dimethyl benzyl ammonium chloride-zinc acetate emulsion, and gives a high water repellency after repeated launderings by only air-drying at room temperature for 1 to 2 days.
In this study the physical properties of cotton fabrics treated with this emulsion (I) were investigated and compared with those of the following fabrics treated in various silicone baths.
II. methyl hydrogen polysiloxane emulsion (with no zinc acetate in I. emulsion)
III. II. plus dimethylolethylenurea resin (two step process)
IV. II. plus melamine-formaldehyde resin (two step process)
V. Repelotex
VI. V. plus melamine-formaldehyde resin (one step process)
VII. V. plus urea-formaldehyde resin (two step process)
VIII. V. plus urea-formaldehyde resin (one step process)
IX. methyl hydrogen polysiloxane (n-hexane solution)
The following results were obtaind:
1. Shrinkage values of untreated fabric are 2_??_4% in the case of no heating and 0.8% for heating at 150°C. Shrinkage of I._??_IX. are approximately 0% in the case of air-drying at room temperature after silicone treatment and also heating at 150°C.
2. Crease recovery of I, III. and IV. are 150_??_200%, and of II. is nearly 100% in comparison with that of untreated fabric on the occasion of air-drying. As for heating at 150°C that of I, III, IV, VI, VII, VIII. and IX are 120_??_160%, and II. and V. almost 100% as compared with that of the untreated.
3. Flex abrasion of I. and II. are 200_??_300% III. about 25% and IV. almost 80% as compared with that of the untreated babric on airdrying. With heating at 150°C II, VI. and IX. are about 400%, I, V. and VIII. approximately 200%, IV. and VII. 115_??_135%, and III, is 50% in comparison with that of the untreated.
4. Tear strengths of I. and II. are 110_??_120%, and III. and IV. about 70% in comparison with that of the untreated fabric in the case of air-drying. On heating at 150°C, III. and IV. are 60_??_70%, VI, VII, and VIII, about 80%, and I, II, V and IX. nearly 100% as compared with that of untreated.
5. Tensile strengths of I, _??_IV. are 50_??_70% in comparison with that of untreated fabric in the case of air-_??_drying. As for heating at 150°C, I, _??_IV. and VI, _??_IX, were 60_??_80% and V. is approximately 100% as compared with that of the untreated.
