fibers from polyurethanes based on halogen-substituted bisphenols

fibers were prepared on an experimental scale by wet and dry spinning from eight, nonelastomeric polyurethanes based on halogen-substituted bisphenols. the fibers had properties suited to clothing textile uses. they were examined primarily for their potential in wash and wear fabrics. the fibers had moderate water absorption, low shrinkag..

measurement of the surface of textiles during microwave drying using a thermographic phosphor

surface temperature measurements of textile materials during exposure to microwave energy are nearly impossible to obtain using conventional temperature measurement methods. wool fabric surface temperatures were obtained using laser-induced fluorescence of the thermographic phosphor, europium-doped lanthanum oxysulfide (la//2o//2s:eu**3**..

role of the chemical nature of the polymeric substrate in forming current-conducting structures in gel-fibres

with the objective of evaluating the role of the chemical nature and packing density of polymer structure elements in forming current-conducting structures, the authors have investigated the possibility of conferring electrical conductivity on fibres based on various polymers. as substrates in the metallization we used cellulosic (scoured..

new process for exhausting a permethrin-based mothproofing agent on wool fibres

to find appropriate systems to solubilize mothproofing agents and to promote their total exhaustion on wool fibres is essential from the environmental point of view. since the predominant mechanism for the uptake of a water-insoluble mothproofing agent by the wool fibre is analogous to that of a disperse dyestuff, a permethrin-based mothp..

selected properties of crossbred lambs' wool. a comparative study

wool samples from five crossbreeds, three 'true wool' and two 'hair' breeds, were scoured and evaluated on the basis of fineness, moisture regain, dye absorption, tensile strength, and felting propensity. results were analyzed to determine differences in properties due to year of birth, breed, and fleece location. year of birth was not a ..

photomechanical degradation of dyed polymers

a stabilizing effect of reactive dyestuffs under photodegradation is evaluated by investigating the durability and degree of the radiation damage to polycaproamide (pca) fibers and natural silk. the character of a stretching load influence on observed stabilization effect in relation to the wavelength of the incident light was shown. (aut..

biodeterioration of wool during storage

the physical and chemical parameters influencing the biodegradation of scoured wool and wool/synthetic fibre blends after oiling (woollen spinning) were studied. under favourable temperature and humidity conditions, more than 10**4 viable bacteria and 10**3 fungi g** $minus$ **1 of wool develop and may cause biodeterioration strains that ..

does improved waste treatment have demonstrable biological benefits?

since 1972, 10 benthic surveys and 9 static fish bioassays have been conducted to assess the impact of avtex fibers, inc. effluent on the lower south fork of the shenandoah river. avtex is a rayon and polyester fibers plant located in front royal, virginia. single surveys in 1972 and 1973 indicated a severe impact on the benthic community..

studies on chitin $em dash$ 3. preparation of chitin fibers

in the reported experiments, the chitin fiber was obtained from a chitin-formic acid solution which was found to be spinnable. this solution was prepared through repeated freezing process by the addition of dichloroacetic acid and isopropyl ether. dichloroacetic acid and methanesulfonic acid were also found to be solvents for chitin, thou..

use of lignin in polyurethane products

the utility of lignin by-products from chemical pulping operations for synthetic polymers is usually pictured as one relating to lignin's depolymerization to simple $left double quote$ feedstock $right double quote$ chemicals or to its use as a low-cost extender however, lignin's inherent properties as fiber reinforcement and adhesive hav..