폴리파라페닐렌벤조비스옥사졸섬유 (PBO섬유) - 초고성능 섬유

차세대의 슈퍼섬유로서 무기섬유의 내열성과 유기섬유의 가볍고 강한 특징을 겸비한 새로운 소재가 요구됨에 따라 동양방은 다우와 공동으로 헤테로환 함유 폴리머로서 폴리벤즈아졸계인 폴리파라페닐렌벤조비스옥사졸(poly P-phenylene benzolbisoxazole : PBO) 섬유를 개발하였다. 폴리벤즈아졸의 중합은 폴리리신산 용액에서의 축중합이 주류이며, P₂O₂에 의한 ..

폴리아크릴로니트릴섬유의 황변현상의 원인과 방지법

폴리아크릴로니트릴(PAN) 및 니트릴기를 함유한 폴리머의 섬유가공제는 가공(예를 들면, 폴리머의 용해라든가 방사과정, 열고정 등) 중에 황변을 일으키는 경향이 있다. 그러므로 표백공정 및 형광증백제의 사용이 필요하다. 방사공정에서의 PAN 용액의 황변에 대해서 검토하였는데 용액중에서 일어나는 착색현상이 주가되며 높은 온도에서 일어나는 絲 형태에서의 ..

Performance of a Hollow-Fiber Spiral Disk for Effective Gas Dispersion toward High mass Transfer Rate.

Researchers investigated the use of a hollow fiber membrane to attain a high gas/liquid mass transfer rate under low gas throughout and shallow sparging conditions. Specifically developed hollow polysulfone fibers generated very fine bubbles. The experime

Conditions for the Microbiological Degradation of Polyvinyl Alcohol.

An investigation into the manufacture and chemical properties of polyvinyl alcohol (PVA) examined the PVA loads of textile wastewater in Germany and current research into the microbiological degradation of PVA. Industrial data collected between 1990 and 1992 suggest that PVA is microbiologically degradable in mechanical-biological wastewa..

Specifying and Selecting Fume Oxidizers for Process Exhaust.

Fume oxidizers eliminate volatile organic compounds (VOCs), ordors, and opacity in exhaust air streams. The mechanism involves the conversion of hydrocarbon compounds into water and carbon dioxide by the addition of heat. Thermal and catalytic oxidizers e

Flexible Manufacturing Systems

Modular production, operated in a short cycle and coupled with quick response linkage in the supply chain, dramatically improves product quality and is highly cost effective. Factors to consider as part of an implementation strategy for modular manufactur

Yellowing in Storage.

The yellowing of apparel items in storage can be caused by a variety of situations. Optical brighteners or fluorescent whitening agents that are applied to apparel fabrics to enhance whiteness can decompose and yellow as a result of heat from drying, stea

Technical Aspects of the Evolution of a 100 Percent post-Consumer Recycled Polyester Fiber.

In 1992, Wellman Incorporated developed EcoSpun, a 100 percent postconsumer recycled fiber Wellman manufactures EcoSpun fibers for polyethylene terephthalate bottles. Wellman sorts the recycled bottles by color, puts them through a series of innovative cleaning steps, and chops them into small pieces called flakes. Using direct extrusion,..

Reclaimed Fibers.

The United States textile waste industry reclaims as many as 1.2 billion pounds of fiber annually, equal to approximately 7 percent of the annual fiber production in the United States. Much of that reclaimed fiber goes into nonwoven products. Sources for reclaimed fibers include gin motes, cotton linters, substandard staple fibers, and th..

Organic Cotton, a Contribution to Sustainable Development.

Cotton is the most important textile fiber in the world based on consumption and production data. Predictions indicate that the cotton sector will continue to experience strong growth in the near term. Despite general consumer perception that cotton is environmentally safer to produce than manmade fibers, cotton growing involves the use o..