Question

As the COVID-19 pandemic unfolds, we often hear about the critical need for N-95
masks (also called N-95 respirators). Did you know these vital pieces of personal
protective equipment are almost entirely made from petroleum-based products? It is
made up of synthetic fibres derived from petroleum. Look at the picture below.

WHAT IS AN
N95 MASK
95: Removes 95%
of .3 micron-particles
VALVE: Optional, reduces
breathing resistance
during exhalation
MATERIAL: Tough. yot flexible
non-woven polypropylene fiber

What type of synthetic fibres are uesd to make N95 Mask?

Who is the inventor of N95 mask?

What does the N95 stand for in N95 masks?​

Answer 1

Answer:

N-95 masks offer multiple ways to keep particles from passing through. Interlaced layers of polypropylene fibres present a tortuous maze in which particles tend to get stuck – a mechanism called’ inertial impaction.’ Another mechanism called ‘diffusion’ helps keep extremely small particles from passing through because the filter causes these particles to move in random directions, colliding with each other and with filter fibres. Finally, during manufacture the mask filter receives a small electric charge that traps particles through a process called ‘electrostatic attraction’ – essentially static electricity, the same way a balloon rubbed on your hair or sweater will stick to a wall.

U.S. manufacturer 3M is a major source of N-95 masks but in early April Ontario premier Doug Ford announced that an automotive parts manufacturer in that province would be shifting production to begin making masks. The federal government has also called on Canadian manufacturers to develop, test and produce N-95 masks. Any such product requires Health Canada approval.

And no, you cannot make an N-95 mask at home. An effective N-95 mask can only be made using the correct materials – derived from petroleum

Answer 2

Answer:

1. Fabric masks should be made of three layers of fabric :

- The inner layer of absorbent material, such as cotton.

- The middle layer of non-woven non-absorbent material, such as polypropylene.

- The outer layer of non-absorbent material, such as polyester or polyester blend.

2. When, in the 1990s, Peter Tsai invented the material that made the N95 mask possible, he never expected it would save millions of lives decades later.

3. It stands for “Non-Oil” meaning that if no oil-based particulates are present, then you can use the mask in the work environment. The number 95 indicates that the mask has a 95% efficiency.