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The textile industry is comprised of a diverse, fragmented group of
establishments that produce and/or process textile-related products (fiber,
yarn, fabric) for further processing into apparel, home furnishings and
industrial goods. Textile establishments receive and prepare fibers; transform
fibers into yarn, thread or webbing; convert the yarn into fabric or related
products; and dye and finish these materials at various stages of production.
The process of converting raw fibers into finished apparel and non-apparel
textile products is complex; thus, most textile mills specialize. Little
overlap occurs between knitting and weaving, or among production of manmade,
cotton and wool fabrics. Textiles generally go through three to four stages of
production that may include; yarn formation, fabric formation, wet processing,
textile fabrication. The flow diagram below shows some of these general steps
in which fibers are processed to manufacture textile goods.
Textile Flow Chart - Taken from
EPA Office of Compliance Sector Notebook Project: Profile of the Textile
Industry
page 14. To print all flow charts and associated text descriptions of
production steps go to this document.
The following table provides a listing of some of the waste streams that may be
generated at each level of textile processing. Process
Air Emissions Wastewater
Residual wastes

Fiber Preparation
Little or no air emissions generated
Little or no wastewater generated
Fiber waste; packaging waste; hard waste
Yarn Spinning
Little or no air emissions generated
Little or no wastewater generated
Packaging waste; sized yarn; fiber waste; cleaning and processing
waste
Slashing/Sizing
VOCs
BOD; COD; metals; cleaning waste, size
Fiber lint; yarn waste; packaging waste; unused starch-based sizes
Weaving
Little or no air emissions generated
Little or no wastewater generated
Packaging waste; yarn and fabric scrapes; off-spec fabric; used oil
Knitting
Little or no air emissions generated
Little or no wastewater generated
Packaging waste; yarn and fabric scrapes; off-spec fabric
Tufting
Little or no air emissions generated
Little or no wastewater generated
Packaging waste; yarn and fabric scrapes; off-spec fabric
Desizing
VOCs from glycol ethers
BOD from water-soluble sizes; synthetic size; lubricants; biocides;
anti-static compounds
Packaging waste; fiber lint; yarn waste; cleaning materials, such
as wipes, rags and filters; cleaning and maintenance wastes containing solvents
Scouring
VOCs from glycol ethers and scouring solvents
Disinfectants and insecticide residues; NaOH; detergents; fats;
oils; pectin; wax; knitting lubricants; spin finishes; spent solvents
Little or no residual waste generated
Bleaching
Little or no air emissions generated
Hydrogen peroxide, sodium silicate or organic stabilizer; high pH
Little or no residual waste generated
Singeing
Small amounts of exhaust gasses from the burners
Little or no wastewater generated
Little or no residual waste generated
Mercerizing
Little or no air emissions generated
High pH; NaOH
Little or no residual waste generated
Heatsetting
Volatilization of spin finish agents applied during synthetic fiber
manufacture
Little or no wastewater generated
Little or no residual waste generated
Dyeing
VOCs
Metals; salt; surfactants; toxics; organic processing assistance;
cationic materials; color; BOD; sulfide; acidity/alkalinity; spent solvents
Little or no residual waste generated
Printing
Solvents, acetic acid from dyeing and curing oven emissions;
combustion gasses; particulate matter
Suspended solids; urea; solvents; color; metals; heat; BOD; foam
Little or no residual waste generated
Finishing
VOCs; contaminants in purchased chemicals; formaldehyde vapors;
combustion gasses; particulate matter
BOD; COD; suspended solids; toxics; spent solvents
Fabric scrapes and trimmings; packaging waste
Product Fabrication
Little or no air emissions generated
Little or no wastewater generated
Fabric scrapes
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The Topic Hub™ is a product of the Pollution Prevention Resource Exchange (P2Rx) The Textiles Topic Hub™ was developed by:
Hub Last Updated: 3/11/2008 |