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Effect of Particulates |
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A wide variety
of particulate substances exist in our everyday life.
Some particulates are taken via breathing
and absorbed into human body, resulting in health disorders.
Pneumoconiosis, for example, is said
to develop after particulates, with diameters ranging from 0.2µm
to 5µm, stay and accumulate inside lungs. |
Pneumoconiosis is a deadly occupational
disease which develops
over a long period of time but is said to be incurable even with
contemporary medicine.
Depending on the type, particulates
could cause acute/chronic intoxication, cancer after a set period
of time, and such symptoms as bronchial disorder, asthma, and allergy.
In recent years, increasing number
of chemical substances has been pointed out as harmful, and stricter
regulations and measurements have been required.
The use of particulate respirators
appropriate for working environment is important to avoid the risks.
In Japan, industrial particulate respirators are required to pass
the Japanese national standard and/or Japanese Industrial Standards
(JIS T 8151) stated in the Industrial Safety and Health Law of
Japan.
Koken’s industrial
particulate respirators shown on this catalogue have successfully
passed the
standards.
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Sizes of various particulates |
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Reference: Particulate substances in the air |
Categories |
State |
Generation
Process / Condition |
Remarks |
Particulates |
Solid |
Particulates generated
in crushing, cutting, and polishing
of solid material, and blending, sieving, and packing of
powder material, and fly, float and diffuse in the air. |
Metal
mine, coal mine, quarry, ceramic manufacturing,
metallurgic polishing, casting and asbestos. |
Fume |
Solid |
Particulates generated
as a result of evaporation and
solidification of solid materials. Particulates generated as a
result of such physicochemical reactions as sublimation or
oxidation of metals. |
Lead (lead oxide),
and welding fume (ferric oxide). |
Mist |
Liquid |
Liquid particulates
that fly, float and diffuse in the air. |
Foam
formulation of solutions generated as a result of
gas generation in electrolysis tank and reaction vessel.
Coating compounds generated in spray painting. |
Smoke |
Solid
/ Liquid |
Particulates
generated in the process of combustion of
organic substances. The particulates include imperfectly-combusted
substances, ash, and moisture. |
Smoke
of quenching oil generated in the process of
metal quenching. Smoke of machine oil generated at
the overheated area of machine and motor. Smoke of
cigarettes. |
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Examples of particulates and harmful effect |
Substances |
Applications
and Generation Sources
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Harmful
Effect on Human Body
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Carbon black |
Rubber strengthening
agent, black colorant, and conductivity
deposition agent |
Pneumoconiosis and cancer |
Cement dust |
Works utilizing
cement |
Pneumoconiosis |
Welding fume |
Welding, meltdown,
and refining |
Pneumoconiosis |
Metal dust |
Grinding, smelting, foundry and brazing |
Poisoning symptom, pneumoconiosis
and cancer
*Symptom varies depending on the type of metal. |
General dust |
Works
where mineral substances, soil, stone, and rocks
exist |
Pneumoconiosis |
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KOKEN LTD. All rights reserved. |
