Elimination of Spin Finish Oil during the Recycline of Thermoplastic Fiber.

A large percentage of fiber waste generated during yarn manufacture is contaminated with spin finish oil Conventional recycling processes that consist of grinding, melting, filtration, and pelletizing do not contribute to the percentage of spin finish in fiber waste. Blending recycled resin containing oil in small amounts with virgin resi..

Recycling of PVC Coated Textiles.

A recycling process converts postconsumer polyvinyl chloride (PVC) coated fabrics into powdered plasticized PVC and fibers. Solvay patented the recycling process in 1998 and granted an exclusive license to Ferrari SA. The Vinyloop mechanical recycling process uses a solvent to separate PVC from the fibers. A grinding machine cuts the coat..

Waste Processing and Recovery (Recycling)

An introduction to materials recovery and recycling during manmade noncellulosic fiber manufacture addresses the chemical processing of nylon 6 waste, including the recovery of caprolactam by thermal decomposition, of nylon 6 through depolymerization-filtration-repolymerization, nylon 6 through reprecipitation, and lactam across the entir..

Chemical Recycling Business from PET Products.

Teijin Limited's chemical recycling system reduces polyethylene terephthalate (PET) to dimethyl terephthalate and ethylene glycol while removing additives and processing chemicals. Dimethyl terephthalate can be treated further to obtain terephthalic acid. The recovered raw materials have a higher purity than those produced from oil and ar..

Z Index in Wool Combing.

The Z index expresses weight irregularities in fiber assemblies and complements conventional measurements of this parameter. It has applications in wool fiber combing and spinning. Yamasaki developed the Z index in response to increased quality demand in these processes. It equals the coefficient of variation in fiber assembly weight mult..

Integrated Filament Production Control.

Lenzing Instruments' Conceop in-line filament production control system combines the advantages of laboratory and online testing for efficient control of parameters related to quality and cost. The system identifies long term variations and provides results that are rapid and reproducible. Measurements of evenness, titer, draw tension, an..

Sensitive Procedures for Determining the Permeation Resistance of Chlorinated Polyethylene against Liquid Propellants.

Measurements of breakthrough time and time averaged vapor transmission rate determined the permeation resistance of chlorinated polyethylene used in chemical protective clothing against the aerospace fuels hydrazine, monomethylhydrazine, and dimethylhydrazine under two exposure scenarios: 2 hour fuel vapor exposure and a liquid fuel splas..

Kenaf Bast Fiber Treatment for Nonwoven Fabrics.

To improve the potential of kenaf fibers as a biodegradable raw material for nonwoven fabrics, an experiment determined the chemical composition of kenaf fibers treated with sodium hydroxide and softeners (Sofuran S and 4) and measured the physical properties of nonwoven kenaf/rayon fabric blends manufactured with water jets. Alkali treat..

Microstructural changes in Polyester Biotextiles during Implantation in Humans.

Thermal analysis, Fourier transform infrared spectroscopy, and vapor phase dyeing methods characterized microstructural changes in woven, knit, felted, and braided polyethylene terephthalate (PET) fabrics implanted in vivo for 2-16 years. Scanning electron photomicrographs showed that PET fibers became more crystalline due to hydroytic bi..

Polyvinyl Alcohol Film Materials Containing Biopolymers: Preparation and Properties.

Researchers investigated the properties and processing conditions of spinning solutions based on polyvinyl alcohol containing the protelytic enzyme pretease C, the high molecular weight antimicrobial agent polyhexamethyleneguanidine hydrochloride, and such modifying additives as sodium alginate and sodium tetraborate. A correlation existe..