BUTMask H2

Description

The original protection halfmask for non-professional use is mainly intended to replace regular surgical masks andrespirators when these are unavailable or do not fit on tightly due to improper design or heavy everyday duty. The halfmask can be assembled from common, commercially distributed materials, and its basic parts are 3D-printable (via FDM and other standard technologies). A tight touch on the face and full sealing of the walls are ensured by a sleeve that, for practical and easy usage, is made of a disposable glove. <h1>Main Benefits</h1> Compared to a simple 3D-printed product, the VUTMask H1/H2 brings the following advantages: • Full sealing thanks to a convenient sleeve • Good face shape adaptability • Face skin contact only with the actual material of the disposable glove (Nitril or Latex) • Sleeve-protected structure eliminating external contamination completely • A material quick and cheap to change and disinfect. <h1>Innovations</h1> • Markedly improved user characteristics: The original version H1 proved to be very uncomfortable if the size had not matched perfectly; thus, we modified the shape of the product to better distribute the pressure on the face and to reduce the discomfort in, above all, the nasal area. • More sizes available: As custom-made hard plastic parts will never deliver the relaxed feeling and face adaptability of commercial soft plastic components, the utility of our half mask closely relates to finding the right size. To satisfy the widest set of users, we designed more size variants than offered in commercially marketed products. • Children’s options: For children and adults alike, the conveniently trimmed XS and XXS sizes are at hand.The half mask is not to be provided to minors who, if unassisted, cannot put it freely on or off the face in problematic situations. A child wearing the mask must not be left unattended, requiring continuous communication with an adult. • A larger XL size. • Less air leaks when on the face: Importantly, the efforts to optimize the product’s shape not only increased the user comfort but also reduced the air leakage, such that where already the H1 version yielded very good measurement results, the improved model exhibits superior tightness. • Modified filter housing: The preliminary tests showed that an original, good quality vacuum cleaner bag can be employed as a suitable improvised filtering medium. To facilitate smooth functioning of the filter, we adjusted its housing room and locking elements, thus decreasing spurious pressure on the bag’s active surface. • An innovated set of headstraps: A close fit on the face is ensured only when the straps have been attached to the head reliably. For this purpose, cross-tied fastening is recommended (the upper straps run above the ears while the bottom ones intersect them at the temples and run on to the crown of the head). • Indirect venting via lamellae: The filter is partly protected by lamellae preventing diverse particles and droplets from impinging directly on the filter’s surface; moreover, the lamellae direct the exhaled air downwards to eliminate its straight impact on another person’s body.

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