PP (polypropylene)
Uniquely Kashima
![]() |
![]() |
PP is a material with special features which make it quite popular for plastic bearings.
(See tables below.)
Overview of PP
PP (polypropylene) is the abbreviation of polypropylene. This is a plastic obtained by polymerizing propylene.
This material offers an especially strong feature: low specific gravity, so low that it can float in water. However, it has poor dyeing qualities, and it cannot resist high temperatures.
Features of PP
◎ Highly Recommended ○ Recommended
△ Not Recommended × Do Not Use
Material | Call symbol |
Dry | Irregular moisture |
In water / In sea-water |
Vapor | Chemical | Non- magnetic |
Insulating | |||
---|---|---|---|---|---|---|---|---|---|---|---|
Acid | Alkali | Organic solvent |
Oil | ||||||||
PP | PP | △ | ○ | ○ | △ | ○ | ○ | ○ | ○ | ◎ | ◎ |
NOTE: For chemicals, please consult us regarding the type and concentration, etc. of such.
Temperature Resistance of PP
☆ Best Recommended ◎ Highly Recommended ○ Recommended
△ Not Recommended × Do Not Use
Material | Call symbol |
Temperature | |||||||
---|---|---|---|---|---|---|---|---|---|
-190℃~ | -100℃~ | -50℃~ | -20℃~ | Room temperature ~60℃ |
~120℃ | ~200℃ | ~350℃ | ||
PP | PP | × | △ | ○ | ○ | ☆ | ○ | × | × |
NOTE: the shape of the bearing will change due to such temperatures.
For more information about tolerances and other issues, download a catalogue from here.