Cotton yarn sizing

Cotton yarns sizing 100% Cotton yarns sizing 100% Cotton yarns sizing... 

February 1951) 85-6, 90-1 (April 1951). Cotton yarn sizing materials, preparation, and practices a review of the literature, with 27 references. 

The cotton yarns sized with various polymeric sizing agents were provided by Southern Regional Research Center, U.S. Department of Agriculture. These yarns had been sized on a laboratory single-end-slasher. Portions of the sized yarns also had been subjected to a desizing process involving a boil-off with 0.5 sodium hydroxide. 

Figure 4. The photoacoustic infrared spectra of (A) a cotton yarn (B) a cotton yarn sized with a polyurethane (C) the corresponding powder from the sized yarn.

The choice and combinations of different size components must take account of many factors if optimum results are to be obtained. Much has been published regarding the optimisation of size formulations in relation to desizing processes [177-183]. Cotton warp yarns sized with starch are normally woven at high humidity (80% and above) to keep yarn breakages low, as the starch film is brittle at low humidity. It has been shown [183], however, that improved weavability at moderate relative humidity (e.g. 65%) can be obtained using (a) starch/acrylamide or hydroxyethyl starch at not less than 15% add-on or (b) poly(vinyl alcohol), which gave excellent results even at a low add-on of 5-6%. 

Table II. Test of Cotton Yarn Treated with Sizing Agents (Yarn 33 mg/m)...

Samples and duplicate samples of unbleached desized cotton print cloth (400 V test fabrics), 80 X 80 count, 3.5 oz/yd2, and yarn size of 40 singles in warp and weft, were randomly selected after conditioning to 55% rh in a desiccator over potassium dichromate solution. The samples were placed inside the pharmacy bottles along the flat sides so that each bottle contained one sample and one duplicate. When the samples were placed side by side along the flat side of the bottle chambers, they filled the entire flat-sided area. Dark chambers were achieved by wrapping the bottles in aluminum foil to exclude light. 

Cotton and mixed yarns sizing Printing Finishing... 

Raw cotton contains, in addition to cellulose, the usual constituents of a vegetable cell. These are oil and wax, pectoses and pectins, proteins and simpler related nitrogen compounds, organic acids, mineral matter, and natural colouring matter. Cotton yarns or piece goods may contain, in addition, adventitious dirt, size, and machine oil. The approximate composition of raw cotton is as follows ... 

A variety of cellulose textile materials, including sized cotton yarns and chemically treated cotton fabrics were studied with fourier transform Infrared photoacoustic spectroscopy (FT-IR/PAS) in our laboratory. The distribution of chemical additives into cotton yarns and fabrics was determined using FT-IR/PAS. It is concluded that FT-IR/PAS is a non-destructive and information-rich analytical technique which is uniquely suitable to the near-surface characterization of a variety of cellulose textile materials. The fundamentals of FT-IR/PAS are also reviewed. 

A variety of cellulose textile materials were studied using FT-IR/PAS In our laboratory. The distribution of sizing agents and finishing agents in cotton yarns and fabrics was determined. The results of these investigations are presented here. 

Table II. The Carbonyl Peak (1730 cm ) Intensities of the Sized Cotton Yarns and the Corresponding Powders...

The polyurethane-sized cotton yarns discussed above were examined with FT-IR/PAS using different mirror velocities. The ratio of the peak intensity at 1 730 cm to the peak intensity at 1 (30... 

The polyacrylate-sized cotton yarn was also examined using different optical velocities, and the peak intensity ratio. 

Figure 10. The photoacoustic infrared peak intensity ratio, polyurethane-sized cotton yarn...

Figure 11. The photoacoustic Infrared spectra of the polyurethane-sized cotton yarn collected at (A) velocity 0 (B) velocity 3 (C) velocity 6 (D) velocity 9 (E) FT-IR/PAS spectrum of the polyurethane sizing agent.

B) an untreated cotton yarn (C) difference spectrum, A-B (D) the polyurethane sizing agent. 

Worm end products, 18 646 Worsted wool-processing system, 26 383-384, 385-386 Worsted yarn, 11 178 Wort, 3 563, 564, 574, 575, 583 separation, 3 578-579 Wound closure, suture size and, 24 216 Wound closure biomaterials, 24 205. See also Sutures Wound dressings cotton smart, 3 31 ethylene oxide polymers in, 10 687 hydrogels in, 13 751-752 Woven fabrics, 11 178 dyeing, 9 170-171 Woven flax fibers, 11 594 Woven plastic bags, 18 12 Wovens... 

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