Download Basic Principles of Textile Coloration by Arthur D. Broadbent PDF

By Arthur D. Broadbent

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Extra resources for Basic Principles of Textile Coloration

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Sizing chemicals of various types are used depending upon the kinds of fibres present. Good size adhesion on cotton, which has a polar hydrophilic surface, requires use of a polar hydrophilic polymer such as starch. For the hydrophobic surfaces of synthetic fibres, less polar synthetic polymer sizes are preferred. 3), as well as wax lubricants, anti-static agents, preservatives, emulsifying agents, and anti-foaming agents. p65 26 27/07/01, 10:08 FABRIC MANUFACTURE 27 treated with an aqueous solution or emulsion of the size, and dried.

Le Châtelier’s principle states that a system at equilibrium will respond so as to counteract the effects of any applied constraint. Water absorption by a fibre liberates heat (exothermic) and will therefore be less favourable at higher temperatures (more heat). 3) between water molecules and appropriate groups in the fibre. 4 regain is higher. 1). For hydrophilic fibres such as wool, cotton and viscose, the relatively high regain values significantly influence the gross weight of a given amount of fibre.

Dyeing in a wide range of hues and depths is a key requirement for almost all textile materials. The regain of a fibre is the weight of water absorbed per unit weight of completely dry fibre, when it is in equilibrium with the surrounding air at a given temperature and relative humidity. 1 shows some typical values. The regain increases with increase in the relative humidity but diminishes with increase in the air temperature. Le Châtelier’s principle states that a system at equilibrium will respond so as to counteract the effects of any applied constraint.

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