HIGH MOLECULAR WEIGHT POLYACRYLAMIDE IN TEXTILE WET PROCESSING

The sorption of nonabsorbent textile materials can be increased by the inclusion of small amounts of high molecular weight polyacrylamide in chemical wet processing baths. Applications of polyacrylamide and a mechanism for observing its effects on nonabsorbent materials are discussed. Abstract.

COLORED EFFLUENTS OF REACTIVE DYESTUFFS -- PROBLEMS AND METHODS TO SOLVE THEM

Since reactive dyestuffs do not become fully fixed in fibers. they are found in effluent in an unfixed, usually hydrolyzed state. problems caused by this effluent and technical methods to economically minimize reactive dye pollution are discussed. Typical quantities of hydrolysates in effluent are presented. German regulations to control ..

DEVELOPMENTS IN DYES AND OPTICAL BRIGHTENERS

Recent trends in dyes and optical brighteners include the use of granules and other forms to avoid dust, greater variety of shades, better exhaustion resulting in less pollution, and better solubility and stability to electrolytes. New disperse dyes have improved fastness to sublimation and thermomigration and can be applied by different ..

LASER ENGRAVING SYSTEM WITH A NEW INTERFACE.

ZED Instruments has introduced a new interface to its filmless laser engraving system for Postscript images generated on the Apple Mac. Data are transferred via Ethernet to the ZEDCO image composition system interface, where the image can be displayed and changed prior to engraving. Users require a standard Mac II platform with 8 Mbyte RA..

LASER ENGRAVER FOR FINER DETAILING OF DESIGNS

Stork's STK 2010 laser engraver is capable of storing designs digitally and transferring these designs to the screen in one operation. The production of films is more efficient and, in some cases, can be eliminated. The screen can be used immediately because developing and polymerizing after engraving are not required. The laser with a fo..

LASER ENGRAVER FOR MORE DETAILED AND FINER DESIGNS

Stork Screen's STK-2010 laser engraver enables a design to be digitally stored and transferred to the screen in one operation. This process eliminates developing and polymerizing after engraving the screen. The laser is capable of focusing at 50 micrometers, which results in very high resolution designs. Halttone designs with a mesh count..

AUTOMATIC WEIGHTING AND DISSOLVING OF POWDER DYES.

Color Service has developed an extremely flexible automatic dye weighing and dissolving system. The system consists of an automatic weighing station, a dye dissolving unit, and a distributor system. A traversing mechanism carrying two balances runs in front of dye storage tanks. A PC-controlled worm conveyor transfers the dye to the balan..

NEW JET PIECE DYEING MACHINES

Gaston County Dyeing Machine company has added two models to the Gaston line of jet piece dyeing machines. The Gaston 820 and 836 operate at low liquor ratios and are capable of processing delicate fabrics with a minimum of tangling. The 820 is specifically designed to process low-yield fabrics with long strand lengths. For manufacturers ..

MINIMIZING THE IMPAIRMENT OF THE PHYSICAL PROPERTIES OF WOOL DURING DYEING BY RESTRICTING THE LEVEL OF PERMANENT SET

A method to restrict the permanent setting of wool fiber during dyeing was developed. Impairment of physical properties was significantly reduced. The method involved the addition of an oxidizing agent, such as potassium bromate or hydrogen peroxide, during dyeing. These agents also restricted increases in hygral expansion that result fro..

PHOTOSTABILITY OF POLYAMIDE FIBERS

Major end product applications for dyed nylon, such as automotive fabrics and carpets, require high stability to photochemical degradation. Most stabilizers that are incorporated into the structure of the fiber perform well only with deep shades of dye. However, Ciba Geigy's Cibatex 4458, a copper complex that is applied during dyeing, co..