Description: Das Projekt "Low energy technology transfer for dyeing and drying leather" wird vom Umweltbundesamt gefördert und von Dynavac GmbH durchgeführt. Objective: A new method for the dyeing and drying of leather is proposed in this project. The system includes a steam purge dyeing module and a dielectric drying radio frequency chamber both of which are innovative. Improvement of the product quality. General Information: The project will design, build and test in an industrial environment, equipment to enable the successful dyeing, dye fixation and drying of crust leather. Furthermore, it will demonstrate on full-scale equipment, that the benefits obtained with laboratory scale machines can be equally successful in reducing energy costs and providing additional benefits in areas of chemical efficiency, pollution, production times and improved product quality. Achievements: Final report submitted June 1992. The steam purge method is very promising with regard to the dyeing, and above all the through-dyeing of leather. Tests with various dyes and different leathers have shown that the steam purge method saves a considerable amount of time, but also poses a number of problems. Using the steam purge method, leathers which resist conventional through-dyeing in drums can be perfectly dyed down to the grain within 2-3 seconds. The greatest problem is encountered during the conveyance of the leather in the mulling chamber as well as in the dye box. The roller conveyors now operate perfectly but not the belts conveying into the mulling chamber and out of the dye box. The edges of the 0,25 mm thick teflonized glass fibre belts are for the guidance not stiff enough normal pu-coated fabric tables have no temperature resistance. Now, 0,1 mm thick tapes of high grade steels are tested for the conveyance into the mulling chamber and out of the dye box a one piece conveyor belt which extends over the whole width is installed. For this one a belt control must be designed and produced because of the short length in proportion to the width. The volume of the dye box was optimized to approx. 60 l. As premininary tests have shown, a hold-up time in the dye of 1,5 sec. at a through-feed speed of 7,5 m/min. is enough for a through-dyeing without alcohol or penetration means. In order to avoid wrinkles when passing the sammying press, a suitable mechanism for spreading out must be designed and produced.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Geräte der Informations- und Telekommunikationstechnik ? Getreide ? Polyurethan ? Polytetrafluorethylen ? Alkohol ? Farbstoff ? Glasfaser ? Lederindustrie ? Schadstoffbelastung ? Technologietransfer ? Wasserdampf ? Färberei ? Leder ? Materialprüfung ? Verfahrensparameter ? Verfahrensoptimierung ? Qualitätsmanagement ? Modul ? Energietechnik ? Anlagenüberwachung ? Produktnorm ? Betriebskosten ? Fördertechnik ? Trocknung ? Chemisches Verfahren ? Verfahrenstechnik ? Energieeinsparung ? Innovation ? Industrieanlage ? Laborversuch ? Stahl ? Reinigungsverfahren ? Produktbewertung ? Kostensenkung ? Energiekosten ? Energiespeicher ? Energietransport ? Abschlussbericht ? Produktdesign ? Umweltfreundliche Technologie ? Umweltverträglichkeit ? Verkehrssystem ? Effizienzsteigerung ? renewable sources of energy ? Verweilzeit ?
Region: Hessen
Bounding box: 9° .. 9° x 50.55° .. 50.55°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1988-12-01 - 1991-12-31
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