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.
Applications
Anti evaporation and anti smell devices, they are useful for floating applications. Used in electronic, pharmaceutical and medical industry.
Technical name
Commercial name
Abbreviation
Molecular formula
Low Density Polyethylene
Low Density Polyethylene
LDPE
(C2H4)n
Physical / mechanical / thermal / electric / magnetic properties
Property
Symbol
U.o.M.
Type
Notes
Values
Density
δ
[g/cm3]
Physical
Room temp.
0.92
Young's modulus
E
[MPa]
Mechanical
-
290
Friction coefficient
µ
-
Mechanical
Room temp.
0.40
Water absorption
Aw
%
Physical
24 h
0.10
Coefficient of linear thermal expansion
α
[10^-6/ºC]
Thermal
(ΔT=0-100°C)
160
Thermal conductivity
λ
[W/(m·K)]
Thermal
Room temp.
0.33
Volume resistivity
ρ
[Ω*m]
Electric
-
> 10^13
Relative magnetic permeability
µ
-
Magnetic
Diamagnetic
<~1
Technical data
Property
Type
U.o.M.
Values
U.o.M.
Values
Hardness
Mechanical
[Shore D]
40 - 55
-
-
Compressive yield strength
Mechanical
[MPa]
9 - 20
[psix10^3]
1.4 - 2.9
Service temperature
Thermal
[ºC]
-30 / 70
[ºF]
-22 / 158
Range
Diameters (min/max)
U.o.M.
Diameters (min/max)
U.o.M.
Precision Grade
1.500 - 100.000
[mm]
1/16 - 4
["]
0 - I - II - III - IV
Corrosion Resistance
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.
Revision n.8