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OUR WORKWEAR PROVIDES
THE FILTER THAT PROTECTS
THE SURROUNDINGS

Humans are the largest source of particles in a clean room. Depending on motion,
the human body emits somewhere between 100,000 and tens of millions particles
per minute. Workwear in cleanrooms should act as a filter that retain the emitted
particles at the inside. Our Cleanroom garments meet the demands and provides
maximum comfort for people who work in cleanrooms as well as other controlled
environments, such as vehicle spraying.

WHAT IS A CLEANROOM? ISO CLASS MAX. NUMBER OF PARTICLES EQUIVALENT
PER M3 > 0.5 µM US FED STD 209E
A cleanroom is an environment with a controlled level of 1
pollutants such as dust, airborne microbes, aerosols (gas with 2 0,35 ––
particles) and chemical vapours. The pollution level is 3 3,5 ––
specified as the number of particles larger than 0.5 micro- 4 35 1
metres (abbreviated as μm = one millionth of a metre!) per 5 352 10
cubic metre of air. A hair is approximately 100 micrometres 6 3 520 100
(μm), so the particles we are talking about are extremely small. 7 35 200 1 000
To provide further perspective, normal outdoor air in an urban 8 352 000 10 000
environment contains approx. 35,000,000 particles larger than 9 3 520 000 100 000
0.5 micrometres (μm) while a cleanroom of ISO class 3 is 35 200 000 (normal room air) ––
permitted to contain no more than 35 particles of the
same size. ISO CLASS 3 ISO CLASS 4

SO WHY DOES A CLEANROOM Suit recommendations: Suit recommendations:
NEED TO BE SO CLEAN AND HOW Hood Hood
IS THIS ACHIEVED? Hair cap Hair cap
Coverall Coverall
After World War II, technical development exploded, but this Underwear Underwear
was soon accompanied by problems. Planes flew off course, Boots Boots
computers lost memory, hospital infections increased and car Face mask Face mask
traffic sometimes came to a standstill because the traffic Gloves Gloves
lights refused to change from red to green. It was discovered Change interval: Each time Change interval: Each time
that the cause of this was the pollutants built in during the cleanroom is entered cleanroom is entered
manufacture of technical equipment and medical devices
The smaller the components people tried to use, the worse the ISO CLASS 5 ISO CLASS 6
problem got. The first cleanrooms were built in the 1960s, and
with the aid of a constant flow of air filtered through what is Suit recommendations: Suit recommendations:
known as a HEPA (high-efficiency particulate air) filter, it was Hood Hood or hair cap
possible to successfully lower and control particle levels in a Hair cap Coverall or coat
very effective manner. Standards such as US Federal Standard Coverall Boots or shoe protectors
209 were also established in order to guarantee quality. Underwear Face mask
Boots Gloves
KEEPING AN EMPTY ROOM CLEAN Face mask Change interval: Twice a week
IS NOT THE BIGGEST CHALLENGE. Gloves
Change interval: Every day ISO CLASS 8
The problems start when you put equipment in it – and
people to handle the equipment. People give off hundreds ISO CLASS 7 Suit recommendations:
of thousands of particles in the form of skin cells, micro- Hair cap
organisms, hair and so on every minute, and the more we Suit recommendations: Coat
move, the more particles we give off. In practice, this means Hair cap Shoe protectors
putting filters around the human body to prevent particles Coat Face mask
entering the air. Shoe protectors Gloves
Face mask Change interval: Twice a week
FRISTADS KANSAS HAS MANUFACTURED CLOTHING Gloves
FOR CLEANROOMS AND CONTROLLED Change interval: Twice a week
ENVIRONMENTS SINCE 1996.

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