AATCC 96-2004 Dimensional Changes in Commercial Laundering of Woven and Knitted Fabrics Except Wool

AATCC 96-2004 Dimensional Changes in Commercial Laundering of Woven and Knitted Fabrics Except Wool.
2. Principle
2.1 The dimensional change of woven and knitted fabric specimens subjected to washing, drying and restoration proce- dures typical of commercial laundering are determined by measuring changes in bench mark distances applied to the fabric before laundering.
3. Terminology
3.1 commercial laundering, n.—a process by which textile products or specimens may be washed, rinsed, bleached, dried and pressed in commercial laundering equipment, typically at higher temperatures and pHs and longer times than used for home laundering.
3.2 dimensional change, n.—a generic term for changes in length or width of a fabric specimen subjected to specified conditions. (see also shrinkage and growth).
3.3 growth, n.—a dimensional change resulting in an increase in the length or width of a specimen.
3.4 laundering, n.—of textile materials, a process intended to remove soils and/or stains by treatment (washing) with an aqueous detergent solution that normally includes rinsing, extracting and drying.
3.5 shrinkage, n.—a dimensional change resulting in a decrease in the length or width of a specimen.
3.6 wool, n.—used in the generic sense, fiber from the fleece of the sheep or lamb, hair from the Angora or Cashmere goat, rabbit hair and the specialty hair fibers from camel, alpaca, llama and vicuna. 4. Safety Precautions NOTE: These safety precautions are for information purposes only. The precautions are ancillary to the testing proce- dures and are not intended to be all inclusive. It is the user’s responsibility to use safe and proper techniques in handling materials in this test method. Manufacturers MUST be consulted for specific details such as material safety data sheets and other manufacturer’s recommenda- tions. All OSHA standards and rules must also be consulted and followed.
4.1 Good laboratory practices should be followed. Wear safety glasses in all laboratory areas. 4.2 The 1993 AATCC Standard Refer- ence Detergent may cause irritation. Care should be taken to prevent exposure to skin and eyes.
4.3 Manufacturer’s safety recommendations should be followed when operating laboratory testing equipment.
5. Apparatus and Materials
5.1 Apparatus.
5.1.1 Wash wheel of the reversing type (see 12.1).
5.1.2 Flatbed press measuring 60 × 125 cm or larger. Any flatbed press capable of pressing specimen 55 cm square may be used as an alternative. The flatbed press is maintained at a temperature not less than 135°C (see 12.2).
5.1.3 Dryer of the rotary tumble type, having a cylindrical basket approximately 75 cm in diameter and 60 cm in length and rotating at approximately 35 rpm. The dryer is provided with a means of maintaining a drying temperature of 60 ± 11°C measured in the exhaust vent as close as possible to the drying chamber.
5.1.4 Conditioning/drying rack with pull- out screen or perforated shelves (see 12.3).
5.1.5 Facilities for drip and line drying. 5.1.6 Hydro-extractor, centrifugal ex- tractor of the laundry type with a perforated basket, 29.0 cm deep × 51.0 cm di- ameter with an operating speed of 1700 rpm (see 12.4).AATCC 96 pdf download.