Effective barrier

Tests conducted by an independent accredited laboratory show that DuPont's Tyvek L1431N fabric has a high barrier performance that provides excellent protection against liquid permeation.

To assess the barrier performance, permeation tests (according to EN ISO 6529 - Method A) were conducted to determine breakthrough times of commonly used chemicals with Tyvek, MPF (Microporous Film) and SMS (Spunbond- Meltblown-Spunbond), materials frequently used for type 4, 5 and 6 single-use chemical clothing.

To conduct the permeation test, 40% sodium hydroxide and 18% sulphuric acid were used. With a breakthrough time of over 480min with two water-based inorganic chemicals, Tyvek offered a higher barrier than the Microporous film, while SMS showed immediate breakthrough. Penetration tests showed virtually no difference between the materials after 1min of exposure. When tested according to EN ISO 6529 - Method A, it was found that Tyvek offers protection of up to 8h.