AATCC 66:1998 pdf download.Wrinkle Recovery of Woven Fabrics: Recovery Angle
1.1 This test method is used to deter- mine the wrinkle recovery of woven fab- rics. It is applicable to fabrics made from any fiber, or combination of fibers.
2. Principle
2.1 A test specimen is folded and com- pressed under controlled conditions of time and force to create a folded wrinkle. The test specimen is then suspended in a test instrument for a controlled recovery period, after which the recovery angle is recorded.
3. Terminology
3.1 wrinkle recovery, n.—that prop- erty of a fabric which enables it to re- cover from folding deformations.
4. Safety Precautions
NOTE: These safety precautions are for information purposes only. The pre- cautions are ancillary to the testing proce- dures and are not intended to be all inclu- sive. It is the user’s responsibility to use safe and proper techniques in handling materials in this test method. Manufac- turers 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.
5.3 Parameters to be controlled in the test are: relative humidity, temperature, applied pressure, time under pressure, and recovery time. This method specifies arbitrary selected values for the latter three factors, based on a compromise be- tween conditions likely to be encountered in service, and the expeditious conduct of the test. Two conditions of temperature and relative humidity are specified as be- ing representative of normal experience. For specialized purposes, it may be ad- visable to use other combinations of tem- perature and humidity.
5.4 Specimens from limp or heavy weight fabrics may twist or curl making angle readings difficult to determine (see 13.3).
6.2.3 Plastic press, consisting of two superimposed leaves 95 × 20 mm fas- tened together at one end. A 23 × 20 mm plastic section is attached to the outer sur- face of the free end of one leaf, flush with the outer edges that form a platform for a weight.
6.3 Tweezers with a jaw width of 25 mm and a line marked on both external faces 5 mm from the end and parallel to the jaw width (see Fig. 5). Another pair of tweezers, preferably plastic, is needed to handle specimens.AATCC 66 pdf download.