Particle analysis by laser diffraction-application and restrictions in the lyocell process

a comprehensive characterization of the spinning dope is extremely important in lyocell technology. Particle analysis by laser diffraction provides one method for description of the state of dissolution of cellulose/NMMO solutions in addition to microphoto and rheological investigations. This article provides methods and results of experi..

Wet cotton and high temperature drying

Seed cotton was harvested both wet and dry from the same field and subjected to different drying treatments. The goal was to determine the quality effect of using high drying temperatures on both wet (18% moisture) and dry (6% moisture) cotton fiber. As was expected, high drying temperatures on already dry cotton damaged fiber length and ..

Quality of the 1997 crop

American Upland cotton quality has generally been at a high level, for the past five crop years for the major quality factors. Classers' color grades of 41/32 and higher accounted fro over 85 percent of the crop for four of the past five years. Classer color grades 41/32 and higher amounted to 89 percent for the 1997 crop through December..

Waste exchanges: marketplace for the cotton industry's recyclable materials

A materials or waste exchange is an information clearinghouse, a facilitator of waste trade, and a marketing channel for commerce in recyclable materials. Most waste exchanges now provide information about 'needed' and 'available' materials on the Internet. It is expected that the convenience and worldwide accessibility of the Internet wi..

Polymer blend fibres having phase separation structure and method for producing the same

Polymer fibres with a spongy structure have uniformly dispersed, interconnected pore spaces. The fibres are formed from polymer blend starting fibres having a phase separated structure comprising two phases, by extracting and removing one phase from the polymer blend starting fibres. IPC D01F.

Substrates which have been provided with an oilwater-and soil-repellent treatment, and fluorine-containing compositions for this purpose

Fluorine-containing compositions for the oil- water- and soil- repellent treatment of substrates comprise a fluorine-containing acrylic copolymer and a fluorine-containing acrylic copolymer and a fluorine-free poly(meth)acrylate of one or more comonomers, or aqueous dispersions of the two components. IPC C08L.

Technical applications of Courtaulds Lyocell

Cellulosic fibres made in the direct dissolution of wood-pulp in an organic solvent are known generically as lyocell fibres. Courtaulds Lyocell is the brand covering fibre types developed for technical markets such as nonwovens, special papers and technical textiles. The paper reviews the development of applications in each of these secto..

Regression Equations for Fibre Length Parameters by Baer comb Sorter, HVI and AFIS.

A study compared the effective length of fiber measurements on the Baer Comb Sorter, 2.5 percent SL value of the high volume instrument (HVI), and UQL (W) value of the Advanced Fiber Information System (AFIS). The value of effective length of the Baer Comb Sorter was generally higher than UQL (W) of the AFIS and the 2.5 percent SL values ..

Assessment of Cotton Fibre Fineness & maturity by Improved Version of Statex-Finemat & Uster-AFIS.

Researchers used united States Department of Agriculture and CIRCOT calibration cotton to test fineness and maturity as measured by the Statex-Finemat, Uster Advanced Fiber Information System (AFIS), and Shirley FMT and compared the results of the three instruments. The Statex-Finemat system uses the double compression method with a senso..

Rapid Conditioning 102.

The United Stats Department of Agriculture developed RapidCon 101, a rapid conditioning machine for cotton fiber testing in laboratories. The RapidCon 101, in which well conditioned laboratory air is drawn through perforated bottom trays containing classing samples, reduces moisture content equilibration times dramatically. The suction pl..