● Ultra-High-Molecular-Weight Polyethylene (UHMWPE/HMPE/HPPE) - The Super Strong Thermoplastic Polymer
Ultra-high-molecular-weight polyethylene (UHMWPE, UHMW) is a subset of the thermoplastic polyethylene. Also known as high-modulus polyethylene, (HMPE), or high-performance polyethylene (HPPE), it has extremely long chains, with a molecular mass usually between 3.5 and 7.5 million amu. The longer chain serves to transfer load more effectively to the polymer backbone by strengthening intermolecular interactions. This results in a very tough material, with the highest impact strength of any thermoplastic presently made.
Polymerization of UHMWPE was commercialized in the 1950s by Ruhrchemie AG, which has changed names over the years. Today UHMWPE powder materials, which may be directly molded into a product's final shape, are produced by Ticona, Braskem, DSM, Teijin (Endumax), Celanese, and Mitsui. Processed UHMWPE is available commercially either as fibers or in consolidated form, such as sheets or rods.
● Chemical and physical properties
UHMWPE is odorless, tasteless, and nontoxic. It is highly resistant to corrosive chemicals except oxidizing acids; has extremely low moisture absorption and a very low coefficient of friction; is self-lubricating (see boundary lubrication); and is highly resistant to abrasion, in some forms being 15 times more resistant to abrasion than carbon steel. Its coefficient of friction is significantly lower than that of nylon and acetal, and is comparable to that of polytetrafluoroethylene (PTFE, Teflon), but UHMWPE has better abrasion resistance than PTFE.
* Citing source: Wikipedia
● Chemical resistance chart
How to use this chart
» Meaning of symbol:
OK: Recommended.
△: Must confirm if usable by testing in advanced.
X: Not recommended.
» This chart only provides the result of a single chemical to material, if a client uses more than one kind of chemical at the same time, please choose material by experience.
» This chart is for reference only which is not applicable to all working environments. Please refer to design equipment according to practical experience.
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Category
|
Chemical
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UPE
|
|
Organic acids
|
Acetic acid
|
OK (10% - 100% @ 20˚C)
△ (80% - 100% @ 60˚C)
|
|
Acetic acid, glacial
|
N/A |
|
Acetic anhydride
|
N/A |
|
Citric acid
|
N/A |
|
Organic compound
|
Acetaldehyde
|
N/A |
|
Acetone
|
N/A |
|
Methyl alcohol
|
OK (20˚C, 60˚C)
|
|
Aniline
|
N/A |
|
Benzaldehyde
|
N/A |
|
Benzene
|
△ (20˚C)
X (60˚C)
|
|
Benzyl alcohol
|
N/A |
|
Benzyl chloride
|
N/A |
|
Corn oil
|
N/A |
|
Ethanol
|
N/A |
|
Ethylene glycol
|
OK (20˚C, 60˚C)
|
|
Fatty acid
|
N/A |
|
Formaldehyde
|
N/A |
|
Formic acid
|
OK (20˚C, 60˚C)
|
|
Hexane
|
N/A
|
|
Lactic acid
|
N/A
|
|
Methanol
|
N/A |
|
Paraffin oil
|
N/A |
|
Petroleum
|
N/A |
|
Phenol
|
N/A |
|
Propane, liq
|
N/A |
|
Propanol
|
N/A |
|
Stearic acid
|
N/A |
|
Tannic acid
|
N/A |
|
Tartaric acid
|
N/A |
|
Toluene
|
X (20˚C, 60˚C)
|
|
Urea
|
N/A |
|
Inorganic compound
|
Ammonia
|
OK (20˚C, 60˚C)
|
|
Ammonium chloride
|
OK (20˚C, 60˚C)
|
|
Ammonium hydroxide
|
N/A |
|
Ammonium nitrate
|
OK (20˚C, 60˚C)
|
|
Ammonium sulfate
|
OK (20˚C, 60˚C)
|
|
Aqua regia
|
N/A |
|
Barium chloride
|
N/A |
|
Barium hydroxide
|
N/A |
|
Brine
|
N/A |
|
Calcium Chloride
|
OK (20˚C, 60˚C)
|
|
Calcium hydroxide
|
OK (20˚C, 60˚C)
|
|
Carbonic acid
|
N/A |
|
Chloric acid
|
N/A |
|
Chlorine
|
N/A |
|
Detergent
|
N/A |
|
Hydrobromic acid
|
N/A |
|
Hydrochloric acid
|
OK (20˚C, 60˚C)
|
|
Hydrofluoric acid
|
N/A |
|
Hydrogen peroxide
|
N/A |
|
Nitric acid
|
OK (0% - 30% @ 20˚C)
△ (30% - 50% @ 20˚C, 60˚C)
X (≥ 70% @ 20˚C, 60˚C)
X (Fuming @ 20˚C, 60˚C)
|
|
Phosphoric acid
|
N/A |
|
Potassium hydroxide
|
OK (20˚C, 60˚C)
|
|
Potassium nitrate
|
N/A |
|
Potassium sulfate
|
N/A |
|
Sodium carbonate
|
OK (20˚C, 60˚C)
|
|
Sodium hydroxide
|
OK (20˚C, 60˚C)
|
|
Sodium nitrate
|
N/A |
|
Sulfuric acid
|
OK (0% - 80% @ 20˚C)
△ (98% @ 20˚C)
X (80% - 98% @ 60˚C)
X (Fuming @ 20˚C, 60˚C)
|
|
Sulfur dioxide
|
N/A |
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