Mercerizing


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Mercerizing

 

(from the name of the English inventor John Mercer, 1791-1866).

(1) A stage in the production of viscose; it consists in the treatment of cellulose with a concentrated aqueous solution of NaOH at 20°-60°C to produce alkaline cellulose. The process takes place in apparatus with periodic action (bath presses) or continuous action. A bath press is a metal tank in which the sheets of cellulose are pressed by a piston after treatment with alkali. The apparatus is designed for a load of 250-500 kg of cellulose; the operation cycle is approximately 2 hr. The output of a continuous mercerizing machine is usually 25 tons per day.

(2) The treatment of cotton fabrics or other cellulose fibrous materials with a concentrated aqueous solution of NaOH (usually at 15°-18°C) to add luster and increase dyeing capacity and strength. The process takes place on a machine that dips the material in the NaOH solution and then presses and washes it. Such machines have a device to stretch the fabrics, which shrink after treatment. Fabrics are mercerized in the unbleached state or after boiling or bleaching.

References in periodicals archive ?
Table 25: World 15-year Perspective for Other TextileMachinery by Product Segment - Percentage Breakdown of DollarSales for Bleaching, Mercerizing, & Dyeing Machinery; TextilePrinting Machinery; Textile Finishing Machinery; TextileDrying Machinery; and Other Complete Textile Machinery Marketsfor Years 2003, 2011 & 2017 (includes correspondingGraph/Chart) II-70
The major product segments analyzed are Fiber-Fabric Machinery (Cleaning & Opening Machinery, Carding & Combing Machinery, Drawing & Rowing Frames, Spinning & Twisting Frames, Yarn Winding Machines,Yarn Preparing Machines, and Other Fiber-To-Fabric Machines), Fabric Machinery (Fabric Weaving Machinery, Fabric Knitting Machinery, and Other Fabric Machinery), Other Textile Machinery (Bleaching, Mercerizing & Dyeing Machinery, Textile Printing Machinery, Textile Finishing Machinery, and Textile Drying Machinery, and Other Complete Textile Machinery), and Parts & Accessories (Turnings and Shapes, For Fiber-Fabric Machinery, For Fabric Machinery, For Other Textile Machinery, and Others).
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