Mater-Bi material have high Water Vapor Transmission Rate (WVTR), but is a barrier for larger molecules. Mater-Bi material is therefore used in a number of applications where it is important to have a safe barrier for virus, bacteria and other potential pathogens such as in packaging and surgical gloves.
Mater-Bi material of thickness 30, 40 and 50 microns was tested for viral penetration (Nelson Laboratories Inc. USA, 2001). The test procedures used are standard methods for testing resistance of materials used in protective clothing to penetration of blood-borne pathogens (ASTM 1671-97b). The test procedure involves use of one of the smallest known viruses ( Phi-X174 Bacteriophage ). Other factors related to penetration, such as wetting characteristics and surface tension are also included in the test procedures.
The blood borne pathogens of major concern are the Hepatitis B virus (HBV), the Hepatitis C virus (HCV) and the Human Immunodeficiency Virus (HIV). These viruses are all much larger than the Phi-X174 Bacteriophage.
All the samples passed the test regarding viral penetration.
A copy of the full report can be made available on request