LOW DENSITY POLYETHYLENE (LDPE) BALLS
Very light thermoplastic material balls, they are available in three versions (high/low density and ultra high molecular weight). They provide good wear and abrasion resistance. Excellent corrosion resistance and resistance to radiations, they are electric insulators.
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Applications
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Anti evaporation and anti smell devices, they are useful for floating applications. Used in electronic, pharmaceutical and medical industry.
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Technical name
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Commercial name
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Abbreviation
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Molecular formula
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|---|---|---|---|
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Low Density Polyethylene
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Low Density Polyethylene
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LDPE
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(C2H4)n
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Physical / mechanical / thermal / electric / magnetic properties
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Property
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Symbol
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U.o.M.
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Type
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Notes
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Values
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|---|---|---|---|---|---|
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Density
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δ
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[g/cm3]
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Physical
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Room temp.
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0.92
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Young's modulus
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E
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[MPa]
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Mechanical
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-
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290
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Friction coefficient
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µ
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-
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Mechanical
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Room temp.
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0.40
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Water absorption
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Aw
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%
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Physical
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24 h
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0.10
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Coefficient of linear thermal expansion
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α
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[10^-6/ºC]
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Thermal
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(ΔT=0-100°C)
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160
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Thermal conductivity
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λ
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[W/(m·K)]
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Thermal
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Room temp.
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0.33
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Volume resistivity
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ρ
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[Ω*m]
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Electric
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-
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> 10^13
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Relative magnetic permeability
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µ
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-
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Magnetic
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Diamagnetic
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<~1
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Technical data
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Property
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Type
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U.o.M.
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Values
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U.o.M.
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Values
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|---|---|---|---|---|---|
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Hardness
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Mechanical
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[Shore D]
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40 - 55
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-
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-
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Compressive yield strength
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Mechanical
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[MPa]
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9 - 20
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[psix10^3]
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1.4 - 2.9
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Service temperature
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Thermal
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[ºC]
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-30 / 70
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[ºF]
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-22 / 158
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Range
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Diameters (min/max)
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U.o.M.
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Diameters (min/max)
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U.o.M.
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Precision Grade
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|---|---|---|---|---|
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1.500 - 100.000
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[mm]
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1/16 - 4
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["]
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0 - I - II - III - IV
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Corrosion Resistance
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Excellent corrosion resistance in contact with acids, alcohols, basis, esters, petrol, greases and oils. Fairish resistance to aliphatic and aromatic hydrocarbons, mineral oils, oxidizing agents. They are not resisting in contact with halogenated hydrocarbons.
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Revision n.8