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PVDF / Ptfe Sleeve Bearing , Anti - Corrosion Plastic Ball Bearings

PVDF / Ptfe Sleeve Bearing , Anti - Corrosion Plastic Ball Bearings

Brand Name : TOB Plastic Bearing
Certification : ISO 16949
Place of Origin : China
MOQ : negotiated
Price : negotiated
Payment Terms : T/T
Supply Ability : negotiated
Delivery Time : negotiated
Packaging Details : Cartons or Pallets
Material : PVDF / PTFE
Basic Properties : Anti-corrosion
Density : PVDF is 1.77g/cm3, PTFE is 2.18g/cm3
The most highest temperature : PTFE is 180℃, PVDF is 150℃
The material of the rings & cage : PVDF or PTFE material
The material of Balls : glass, ceramic or stainless
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PVDF/PTFE Anti-corrosion Plastic Bearings

As the typical type of fluoroplastic, PTFE and PVDF have the most excellent anti-corrosion performance, Among them PTFE has the best anti-corrosion performance of all the engineering-plastics known to man,
PVDF/PTFE Anti-corrosion Plastic Bearings could be used in all the Strong Acid and Alkali application, including HF and smoke formation H2SO4 HNO3 or HCL (98% above) etc., and PVDF/PTFE Anti-corrosion Plastic Bearings could be used in high temperature application. PTFE could be used in 180℃ and PVDF in 150℃. But PTFE has very low mechanical strength, easy to be out of shape and have large Dimension change when the temperature rise or reduce.

The Density of PVDF plastic bearings is 1.77 g/cm3, PTFE plastic bearings is 2.18 g/cm3, Sliding friction coefficient is 0.30 and 0.10, Short-time highest application temperature is 150℃ and 260℃.

So PVDF/PTFE Anti-corrosion Plastic Bearings couldn't be used in heavy load and high-speed occasion. Compared with PTFE, PVDF has better comprehensive performance. Generally the rings and cage were made with PTFE or PVDF, Balls were made with glass, ceramic or stainless.

Basic properties of staple engineer plastic
Long-time working temp.90100110100150230260280
Ball indentation hardness50801701708019030 
Tensile stress2530708050752595
Sliding friction coefficient0.290.30.340.35-0.420.3 0.08-0.10.3-0.38
Melted temperature130165175260172280327343
Short-time highest application temperature90140150170150260260300
Coet of Inear expansion (10^-5/K)13-1517108135125
Dielectric constant at 1 Mhz(10^6HZ) 2.13.2-3.3
Volume resisrivity (Ω·cm)>10^15>10^24>10^1410^1310^12>10^1310^1410^13
flammability UL94++-(+)(+)-++
Note: + =resistant; (+) =partly resistant; - =non-resistant

Chemical properties of Engineer plastic
Chemical CompositionMaterial
Formic acid (10% water)++++--+++
Ammonia (10% water)-++++(+)+++
Aether+ ++++++ 
Bori acid (10% water) ++(+)+++++
Aminoform+++ --(+)--
Aeti aid 100%(+)-+ --++-
Aceti aid (10% water)+++ -(+)+++
HF  + --++(+)
Formaldehyde aqu (30% water) ++++-+++
Glycerin+ + +++++
Iodine, Glycol+ +(+)-(+)++(+)
K2Cr2O7 (10% water)  +++-+++
KMnO4 (1% water)++++-(+)++(+)
2-Hydronyprpionic 10%+ ++--++-
2-Hydronyprpionic 90%+++++(+)+++
Nad (10% water)+++++++++
NaNO3 (10% water)+ +++++++
NaOH (50% water) ++++-+++
NaOH (5% water)  +++-++ 
Oxalic (10% water)++++(+)(+)+++
Tetracarp+ ++(+)+--(+)
H3PO3 100% ++ -  ++
H3PO4 (10% water) +++--+ +
NHO3 (2% water)++++--+++
HCL (2% water)+++(+)--+++
H2SO4 98% -+ --+(+)-
Soap liquid  ++++++ 
Alkaliliquid (10% water)  +++++++
Water, cold+++++++++
Water, hot +++(+)-+++
H2O2 (30% water) (+)++--+++
H2O2 (0.5% water)+ ++-(+)+++
Asphalt+ + (+)+(+)(+) 
Note: + =resistant; (+) =partly resistant; - =non-resistant

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