Spray Impact Test

The Spray Impact Test is designed to evaluate the resistance of textile fabric to the penetration of water under contact with sprayed water. The test has also been adopted by the medical industry as a measure of liquid barrier performance for surgical gowns, isolation gowns, other protective apparel, surgical drapes, or drape accessories.

This test is used for 510(k) submissions to the FDA and to classify gowns and drapes for marketing with a level 1 – 4 according to AAMI PB70 document.

Table 1. The AAMI gown classification according to the levels of barrier performance

Barrier Performance	Barrier Protection	Resistance measures	Test standards	Test criteria	Acceptable quality level
Level 1	Minimal	Liquid penetration	AATCC 42	Water impact ≤ 4.5g	4%
Level 2	Low	Liquid penetration	AATCC 42	Spray impact ≤ 1.0g	4%
Level 2	Low	Liquid penetration	AATCC 127	Hydrostatic pressure ≥ 20cm	4%
Level 3	Moderate	Liquid penetration	AATCC 42	Spray impact ≤ 1.0g	4%
Level 3	Moderate	Liquid penetration	AATCC 127	Hydrostatic pressure ≥ 50cm	4%
Level 4	High	Liquid and vial penetration	ASTM F1671	Pass	4%

The test is performed in compliance with AATCC Test Method 42, and AAMI PB70.

Applicable Standards

AAMI PB70 Liquid Barrier Performance and Classification of Protective Apparel and Drapes Intended for Use in Health Care Facilities
AATCC 42 Water Resistance: Impact Penetration Test
IEST 80.3
ISO 9073-17 Determination of Water Penetration (Spray Impact)

Test Procedures

A volume of water is allowed to spray against a taut surface of a test specimen backed by a weighed blotter. The blotter is then reweighed to determine water penetration and the specimen is classified accordingly.

STEMart provides a accurate spray impact test to examine the water resistance of gowns and drapes. If you want to learn more detail about our service, or would like to consult with the experts at STEMart, please feel free to contact us.

Spray Impact Test

Online Inquiry