AATCC 66-2017 Wrinkle Recovery of Woven Fabrics: Recovery Angle.
2. Principle
2.1 A test specimen is folded and compressed 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
1 wrinkle recovery, n.—that prop- erty of a fabric which enables it to recover from folding deformations.
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. 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. Uses and Limitations
5.1 Two options for performing wrinkle recovery angle testing are included in this test method. The Option 1 procedure is applicable to equipment commercially available and similar to devices used in ISO 2313: Determination of the Recovery from Creasing of a Horizontally Folded Specimen by Measuring the Angle of Recovery (see 13.1). The Option 2 procedure is for those laboratories that still have the older recovery devices which are no longer available from their original source.
5.2 This method has been used as a research tool and for production quality control; however, it is not recommended to be used for acceptance testing (see 13.2).
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 between 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 advisable to use other combinations of temperature and humidity.
5.4 Specimens from limp or heavy weight fabrics may twist or curl making angle readings difficult to determine (see 13.3).AATCC 66 pdf download.