PROCESS CHARACTERISTICS OF HIGH-TEMPERATURE POLYMERS AND COMPOSITES

The rheological and thermal behaviors of graphite fiber/high-temperature composite were investigated for their application in the aerospace industry. The treatment of prepregs at elevated temperatures before composite fabrication was found to minimize the formation of voids and blisters and yield composites of excellent quality and reprod..

HIGHLY SOPHISTICATED,LOW-COST CONTINUOUS PES-POLYCONDENSATION.

A simplified, low-cost, continuous polycondensation process (LCCP) was designed to make smaller units available at reasonable prices. The new process is used for PTA and monoethylene glycol (MEG). The viscosity of PTA and MEG paste was reduced, and it can now be mixed in an ordinary mixing vessel. Heating and polycondensation occurred in ..

TENCEL--COURTAULDS SOLVENT-SPUN CELLULOSIC FIBER.

Courtauld's solvent-spun process for manufacturing Tencel, a cellulosic fiber, involved heating the amine oxide which is then used to dissolve wood pulp. This process produces a very clear, viscous solution. This solution is then filtered, spun into a bath, and recycled. Tencel's fiber structure possesses a smooth surface and a circular c..

COTTON IN HIGHLOFT PRODUCTS--SOME NEW IDEAS IN COMPOSITES.

The use of a composite highloft structures made with cotton fibers can improve the hydraulic efficiency of the pulp core in diapers and incontinent products. The long cotton fibers create greater physical strength in the pad and reduce the pad separation common in thinner super-absorbent products. Other applications for cotton-containing ..

Lyocell/Wool Mixtures -- Characteristics, Application, and Dyeing.

Lyocell is suitable for winter apparel, when blended with more insulating materials, such as wool fibers. Lyocell has similar moisture absorption characteristics as wool. Researchers studied the optimal dyeing conditions for lyocell/wool blend fabrics with regard to fiber damage, fibrillation, colorfastness, and dimensional stability. Dir..

Development of New Yarns Based on Compact Spinning Technology.

Ring spinning is the most important spinning process due to the high quality of ring spun yarns based on staple fiber. Compact spinning represents a new type of ring spinning with improved production costs and product quality. Yarn applications include both weaving and knitting. Tension in the compacting zone is critical to yarn propertie..

Online Monitoring in Spinning.

Although online quality control does not eliminate conventional laboratory control completely, it accelerates and simplifies the collection of data concerning productivity and quality. Online systems continuously monitor process parameters, indicate disturbances and inefficiencies instantly and objectively, assist in planning material and..

MAJAC - Moisture Adjustment and Control for Cotton Opening.

Streat Instrument's MAJAC system accurately measures and controls the moisture in cotton fibers at laydown, which increases yields through reduced waste, improved yarn quality, improved yarn evenness, reduced short fiber content, and improved yarn strength. Ensuring that the moisture content of the fiber being fed into the opening machine..

Synthesis and Properties of Water-Soluble Derivatives of Chitin.A Review.

Researchers at the Moscow State Textile Academy developed concepts to explain the correlation between the structure and properties of an important class of biopolymers that consisted of aminopolysaccharides derived from aquatic organisms. Experiments used improved methods of obtaining water soluble derivatives of chitin and characterized ..

'Kuralon K-Ⅱ' - Principal Fiber for 21st Century.

Kuraray Company Limited's Kuralon K-Ⅱmanmade fiber derives from a solvent wet-cooled gel extrusion method that functions as an environmentally friendly closed system and provides improved fiber structure uniformity, organic solvent recyclability, and greater flexibility in polymers than conventional wet extrusion methods. Kuralon K-Ⅱpro..