Recent tests conducted by an independent, accredited laboratory show that white Tyvek® L1431N fabric has a good chemical barrier performance that provides excellent protection against liquid permeation.
To most people all protective coveralls look the same and selecting the correct one to offer the best protection against liquid penetration and permeation can be a task in itself. In order to factually assess the barrier performance, permeation tests (according to EN ISO 6529 – Method A) were conducted to determine the breakthrough times of commonly-used chemicals with white Tyvek®, MPF (Microporous Film) and SMS (Spunbond-Meltblown-Spunbond) – materials that are frequently used for Type 4, 5, and 6 single-use chemical protective clothing.
Liquid penetration is a physical process whereby a liquid penetrates a fabric by passing through pores or holes in the fabric. Permeation is the process by which a hazardous liquid chemical moves through a protective clothing fabric on a molecular level. The resistance of the fabric to permeation is determined by measuring the breakthrough time and the rate at which the hazardous chemical permeates and is detected on the inside surface of the fabric.
To conduct the permeation test and determine the actual and
Penetration and repellency tests were also conducted according to EN ISO 6530 standard and showed virtually no difference between the three materials, indicating the liquid barrier of the three materials seems to be of equal protection. However, this standard stipulates just one minute of exposure to the hazardous substance, which is rarely the case in working conditions.
When tested for permeation according to EN ISO 6529 - Method A, which determines the resistance of materials to permeation by liquids and gases, it was revealed that white Tyvek® offers long-term protection of up to eight hours for the aforementioned chemicals – much closer to what is needed in real use situation.
Tyvek® is an excellent material because the continuous, strong,
The range of Tyvek® garments includes Tyvek® 500 Industry, Tyvek® 500 Xpert and Tyvek® 600 Plus, Tyvek® 400 Dual and Tyvek® 500 Labo. Ultimately the ambition for DuPont is to protect every single person in every situation and continuous attention is paid to every detail. That’s the reason why Tyvek® makes the difference.