Specification
PERMAFLOAT
®
SPECIFICATIONS
Permafloat
®
Specifications
All Cellofoam Permafloat dock floats are manufactured to the exacting standards listed on this
document. Each float is made up of a shell rotationally molded from durable polyethylene and is
filled with expanded polystyrene foam to offer maximum buoyancy even if the shell is breached.
Permafloat shells are made from virgin, linear low density, polyethylene resin that contains UV
inhibitors and carbon black to protect from deterioration caused by sunlight. The resin offers a
balance of toughness, rigidity, environmental stress crack resistance, and low temperature
impact performance. Typical physical properties of the shells appear in the following table.
.
Properties
Test Method Units Typical Results
Density ASTM D792
g / cm
3
0.935
Melt Index (190
o
C/2.16 kg)
ASTM D1238 g / 10 min 5.2
Environmental Stress Cracking Resistance
(ESCR)
1
ASTM D1693
122
o
F (50
o
C), 10% Igepal, F50
hr > 982
122
o
F (50
o
C), 100% Igepal, F50
hr > 1000
Tensile Strength (Yield)
1
ASTM D638 psi (MPa) 2720 (18.8)
Flexural Modulus (1% Secant)
1
ASTM D790B psi (MPa)
95000 (655)
Rotationally Molded Impact Strength
ARM Int.
2
-40
o
F (-40
o
C), 0.125 in (3.18 mm)
ft-lb (J) 59 (80)
-40
o
F (-40
o
C), 0.250 in (6.35 mm)
ft-lb (J) 188 (255)
Deflection Temperature Under Load
1
ASTM D648
66 psi (0.45 MPa), unannealed
o
F (
o
C)
125 (51.7)
264 psi (1.8 MPa), unannealed
o
F (
o
C)
95 (35.0)
Melting Temperature (DSC) Dow Method
o
F (
o
C)
257 (125)
Permafloat® Shell Virgin Polyethylene Typical Physical Properties
3
1
Plaque molded and tested in accordance with ASTM D4976
2
Association of Rotational Molders International, Low Temperature Impact Test, Version 4.0, July 2003. Note that
some competitors use the impact test procedure of ASTM D1998 which is, by definition, only applicable to
cyclindrical tanks for upright chemical storage and is not applicable to dock floats.
3
These are typical values only acquired and not to be construed as specifications. Further, these values are for virgin
polyethylene only, and for molding under ideal conditions. Carbon Black is added at the time of molding and may
change these typical values significantly.