Q: The mask is similar to the one developed a few weeks ago at the CTU, the one modified for manufacture by 3D printing by the Czech Institute of Informatics, Robotics, and Cybernetics (CIIRC) to be precise. How is this possible?
A: The RP95-M half mask is based on the CIIRC RP95-3D model. Based on the CTU’s start-up company TRIX Connections exclusive license, the design of the mask was modified by our technologists and designers for mass production.
Q: The mask seems large; won’t weight be a problem?
A: The weight of the half mask is 160g including the filter. During testing it was proven than the mask can be comfortably work for long durations of time.
Q: Why is the filter fixed to one side?
A: The filter is mounted to the side due to safety reason during use. When lifting an object off the ground and tilting one’s head, there was a risk that the mask would be pushed off by one’s own chest. This solution also widens the user’s field of view.
Q: How many times can the mask be used?
A: Thanks to the durable materials, the mask can be sterilized in and autoclave multiple times. The polyamide used on the mask allows for a limitless amount of sterilizations. The sealing material, a thermoplastic elastomer, allows for a 100 sterilization cycles and an unlimited amount of disinfection cycles.
Q: How many cycles does the filter last?
A: The limiting factor on the life of the filter is the degree of mechanical fouling due to heavier breathing. In a dusty environment such as a building site, the filter can be clogged in two days. In a clean environment such a hospital, the filter may last at least a week of continuous usage. In practice, this time may prove longer. Clogging up does not influence the filter’s ability against viruses, however.
Q: Is the use of the respirator dangerous to the user’s surroundings?
A: Using the half mask primarily protects the user. If the user’s surroundings are not protected otherwise, it is good to supplement the respirator with a basic surgical mask. Our team is currently working on incorporating a nano particle fabric into the exhaust valve that would eliminate the need for a supplementary surgical mask. Masks thus equipped would be ideal for old age homes and maternity wards.