EFFECT OF FIBER STRUCTURE OF WILD SILK FIBER ON CREEP BEHAVIOR IN ETHZNOL

Measurements of small angle X-ray diffraction and mechanical properties showed that wild silk fibers had a porous structure and that their fibrils had a zig-zag structure unlike domestic silk fibers. This structure explained why wild silk fibers had a larger creep elongation in ethanol than domestic silk fibers. The treated wild silk fibe..

MONITORING COTTON WHITEFLY THROUGH YELLOW STICKY TRAPS.

Yellow sticky traps were used during two cotton growing seasons to monitor aduit whitefly populations at two locations in the Nawabshah district of Sindh Province. The object of the study was to determine the effectiveness of the traps in monitoring whitefly populations. Population trends were similar in all four locations in both seasons..

COTTON CONTAMINATION SURVEY.

The International Textile Manufacturers Federation has conducted an international survey on cotton contamination, which remains a major problem, particularly with automation. In the survey, spinnig mills indicated the extent of contamination for each of 16 sources. The most frequent source of contamination was organic matter (leaves, feat..

SPECIALTY COTTONS ADD DIVERSITY

Organically grown cotton and naturally colored cotton have established a viable and growing niche for cotton growers, textile mills, and apparel manufacturers, but several experts not that specialty cotons are an addition to conventional cotton, not a replacement. Topics discussed include a recent conference on specially cottons sponsored..

COURTAULDS STARTS COMMERCIAL PRODUCTION OF CELLULOSIC FIBER

Courtaulds has begun production of Tencel, a solvent-spun cellulosic fiber. It will produce the fiber at a rate of 20,000 tons per year at its plant in Mobile, Alabama. The manufacturing process is environmentally friendly, according to company representatives. Courtaulds has invested considerable time, effort, and money into developing m..

GRADING TENCEL.

The use of Courtaulds' Tencel cellulosic fibers in apparel fabrics has been very successful. Tencel is often used in blends with cotton, linen, wool, silk, and rayon. Compared with rayon, another cellulosic, Tencel has excellent washability, superior strength, and takes color better. Tencel will make its first strong appearance at the ret..

TEIJIN TO DOUBLE PRODUCTION OF ARAMID FIBERS.

Teijin will almost double its annual output of aramid fibers to meet the increasing demand for this fiber in the automotive and construction industries. Aramid fibers can be used as supplementary support for rubber timing belts in automobiles and as a lightweight alternative to concrete pylons. Teijin recently completed an enlargement of ..

EFFECT OF FINISHING ON CHEMICAL AND STRUCTURAL CHANGES IN VISCOSE FIBERS.

The effects of finishing on the chemical properties and structure of conventional viscose fibers and high-modulus viscose fibers were examined. The finishing processes included desulfurizing, bleaching, and brightening. The degree of polymerization, content of carbonyl and carboxyl groups, degree of swelling in water, solubility in sodium..

HIGH-STRENGTH FIBERS BASED ON LIQUID-CRYSTALLINE POLYMERS.

Research into the preparation of high-strength fibers from liquid-crystalline (LC) polymers at Khimvolokno in Russia is reviewed. Poly-p-phenylene terephthalamide (PPTA) is used in the preparation of high-strength, high-modulus aramid fibers. Comonomeric units can be added to the solution of LC PPTA to change such properties as strength, ..

COURTAULDS INTRODUCES SUPERABSORBENT FIBER.

The development of superabsorbent polymers in both powder and fiber form is reviewed. Powders are cheaper to produce than fibers, but more difficult to handle and incorporate in a product. Fibers are easier to use and have wider applications. Superabsorbent fibers can be produced by chemical modifications to a non-superabsorbent fiber or ..