By ACIMIT - Italy
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Additional resources for Reference Book of Textile Technologies - Nonwovens
The strippers group and remove the fibres to form a continuous web. Part of the fibres not removed by the strippers is recycled by the main roller and mixed with the new fibres, which feed in continuous the card. Therefore during carding both the uncarded and the recycled fibres circulate on the main roller in various ratios, according to machine configuration and to various set-ups, which fact contributes to the mixing power of the card. Arrangement of the workers in a card The various rollers are covered by steel points of different types for fibre processing, named clothings.
As soon as the fibres enter the expansion chamber, they come into contact with a disc rotating at high-speed and covered with steel hooks. The hooks drag the fibres over a stationary belt, which too is covered with hooks. The opening of the fibres takes place between the hooks of the rotating disk and the hooks of the belt. The fibres continue their course inside an airflow, which carries them outside the machine into a delivery chamber. e. to minimize costs. In some sectors as in the production of wall-to-wall carpeting, dyed fibres are mixed together to produce specific shades or softened hues.
There are many different types of carded nonwovens in the market and a wide range of raw materials, which can be used for their production. Consequently, an extremely wide variety of card configurations is used. e. cards. The name Garnett can generate confusion, as in Europe the term Garnett indicates something slightly different. In both cases, it comes to carding machines and the operating principles are the same. In Europe, the term “garnetting” is referred to a process in which the discarded textiles, both in form of yarns and of fabrics, are recycled after being cut and torn by a strong machinery.