Particle Shed Analysis
The Particle Shed Analysis is used to evaluate the linting of nonwoven materials in a dry state. This test is required for cleanroom and surgical garments and is performed on wipers, instrument wraps, face masks, cleanroom garments, and similar woven and nonwoven fabrics. It is performed in compliance with Helmke Drum – IEST-RP-CC003.3, Gelbo Flex – ISO 9073 and EN 13795. Nelson Laboratories has extensive experience testing surgical garments and other woven and nonwoven materials.
- IEST RP-CC003.3
- EN 13795
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|PSA115||Particle shed analysis: Helmke drum particle counts, IEST RP-CC003.4||Add|
|PSA120||Particle Shed Analysis: Gelbo Flex, ISO 9073||Add|
PSA115 - Particle shed analysis: Helmke drum particle counts, IEST RP-CC003.4
PSA120 - Particle Shed Analysis: Gelbo Flex, ISO 9073
PSA115: Minimum of 5 samples recommended. Include 2 extra samples for setup; each sample must be a medium size garment
PSA120: Minimum of 14 swatches per material type. Each swatch must be 22 cm x 28.5 cm minimum
Study OutlineThe Particle Shed Analysis test uses the following methods to evaluate the linting of nonwovens in a dry state:
Helmke Drum: The procedure consists of placing the test material or garment into a stainless steel tumbling drum, about 43 cm in diameter by 33 cm wide, rotated at 10 revolutions per minute (rpm) and connected to a laser particle counter. Each sample is then allowed to tumble for a 10-minute period and the particles are collected and counted using the laser particle counter. The particle size range evaluated is 0.3 µm to 10 µm.
Gelbo Flex: The flex tester is a mechanism that allows a plate to move toward and away from a fixed plate at a frequency of 60 cycles/min, while at the same time rotating clockwise and counter-clockwise through an angle of 180° in synchronization with the to-and-fro movement. Particles in the size range of 0.3 µm to 25 µm are sampled at the airflow rate of 28.3 liters per minute (LPM). Five repeats are tested from side A and another five repeats from side B.