OXIDIZED POLYACRYLONITRILE(PAN)-BASED FIBERS

The production and application of oxidized PAN fibers are described. RK Carbon Fibers produces Panox (a PAN-based fiber) in filament and stretch-broken tow. Panox does not burn or melt and resists shrinkage at high temperatures. Panox is primarily used as a precursor in the manufacture of carbon composites for aircraft braking systems. Pa..

STRATEGY FOR THE DEVELOPMENT OF A KENAF-BASED PULP AND PAPER INDUSTRY

A commercial-scale kenaf production and separation facility constructed in Mississippi is the first of its kind in the world. The aim of this installation is to determine whether kenaf can be used as a substitute for wood in a pulp mill. The kenaf fibers are separated into long and short fibers. The commercial development of a kenaf-based..

FALSE TWIST DRAW-TEXTURING

process combination and an increase in process speed were the first two major developments in the production of false twist set textured yarn with increased dyeability and uniformity. Three major developments in false twist mechanisms were pin twisting, triaxial disc friction twisting, and contact twisting. Increasing process speed has be..

PROJECT FOR THE PROCESSING OF FINE AND EXTRA-FINE COUNTS

Sant'Andrea Novara has developed production systems for fine and extra-fine wool fibers in the range Nm 60 to 100. These counts are processed on specially equipped machines for blending, re-combing, third and fourth passage preparation, and finishing. The line also includes machines for reduction, first passage can delivery, second passag..

THIBEAU A WORLD LEADER IN CARDS FOR THE NONWOVEN AND WOOL AND SEMIWORSTED SPINNING INDUSTRIES

For the past 20 years, A. Thibeau and Cie has been a member of the N. Schlumberger and Cie Group, benefiting from the intra-group capability to supply cards to be integrated into complete lines by NSC. Intensive research and development efforts resulted in the CA6 card with automatic speed and output adjustments. Since 1986, Thibeau has s..

DEVELOPMENT OF BIOREACTOR SYSTEM IMMOBILIZATION MATERIALS AND METHODS -- OUTLINE OF THE RESEARCH

Two kinds of PVA supports, super fine fibers (SFF) and PVA bearing styrylpyridiium group (PVA-SbQ), were developed to immobilize biocatalysts. The SFF bound biocatalysts using electrostatic interaction, whereas the PVA-SbQ entrapped biocatalysts using visible light irradiation. The PVA-SbQ was further treated to make the enzymes entrapped..

GRAFTING OF ACRYLIC MONOMERS ONTO CELLULOSE FIBERS USING MANGANESE 3 + INITIATOR

Bleached cellulose fibers from softwood were grafted with the following acrylic monomers: methyl methacrylate, acrylonitrile, allyl acrylate, allyl methacrylate, butyl acrylate, butyl methacrylate, and crotyl acrylate. Manganese 3+ initiator was used as a pyrophosphate complex in acid aqueous medium at 30 degrees Centigrade. The groups at..

CELLULOSE -- STRUCTURAL AND FUNCTIONAL ASPECTS.

The proceedings of Cellucon-88, an international conference on cellulose held in Kyoto, are compiled. Topics include structure, bacterial cellulose, the production, characterization, and properties of derivatives, liquid crystals, membranes, and physiological functions, applications, and biomedical uses of derivatives. numerous refs.

WOOL PRODUCTION AND SHEEP MANAGEMENT PRACTICES IN THE WESTERN HIMALAYAS.

Sheep management practices and wool production in the Himachal Pradesh region of the Himalayas were studied during the summer months of 1984 and 1985. Surveys were conducted to determine the structure of the sheep population (number of flocks, population, flock sizes), annual wool yield per sheep, average body weight, and mortality. Addit..

COTTON BREEDING DIRECTIONS -- THE YARN PRODUCER'S VIEWPOINT.

The effect of cotton fiber quality on performance during ring, open end, and air-jet spinning is reviewed. Systems that involve roller drafting require long fibers of consistent length. Open end systems are less sensitive to length variation but need finer fibers with increased strength. In the United States, the trend toward increasing y..