Test principle
The sample in the test chamber experiences a comprehensive effect of torsion and compression. During the process of torsion, the air is drawn from the chamber and the particles in the air are counted and classified using a laser dust particle counter.

Standards
YY/T 5056.6 Surgical drapes, gowns and clean air suits, used as medical devices for patients, clinical staff and equipment - Part 4: Dry lint test methods.
ISO 9073.10 Textiles. Test methods for nonwovens. Part 10_Lint and other particles generation in the dry state.
EN Surgical drapes, gowns and clean air suits, used as medical devices for patients, clinical staff and equipment - Part 2 Test methods.

Applications
The instrument is used for dry lint test of non-woven fabric in the dry state, and mainly suitable for assessing the lint performance of nonwoven fabrics and other textile materials which are used as medical protective materials (surgical drapes, gowns and clean air suits). During the test, the sample in the chamber undergoes a comprehensive force of torsion and compression. Meanwhile, the air is drawn from the chamber for air-born particles counting and classifying by a laser dust particle counter so as to assess the test results.

The sample is subjected to a combined effect of torsion and compression in the test chamber. During this twist, air is drawn from the chamber and the particles in the air are counted and classified by using a laser dust particle counter.