service temperature for rotomoulding polymers
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Service Temperature for Rotomoulding polymers
Star Asia 2017
Les Druyf
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Rotomoulding
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Rotomoulding
• Diverse
• Different
• Dynamic
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Rotomoulding
• Diverse
• Different
• Dynamic
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Rotomoulding
• Diverse
• Different
• Dynamic
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Rotomoulding
• Diverse
• Different
• Dynamic
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Rotomoulding
• Pushing the boundaries further each year.
• More intricate shapes
• Tougher environments
• Increased mechanical properties
Higher temperatures
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Higher temperatures
What do we mean by this?
Example:
Starting an engine, the longer it runs the
hotter the area around it and in turn it effects
other components near by.
Also when stopping and engine all the air
flow stops and at this time the temperature
increases for a short while?
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Service temperature
2 types of service temperatures
• Maximum peak temperature indicates the maximum
temperature at which a material can be used for a very short
period of time. Above this temperature, the strength and properties
of the material rapidly decrease.
• Continuous service temperature is defined as the highest
temperature at which a material can function for an extended
period of time without failing.
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Service temperature
• Service temperature is dependant upon many factors. Therefore
assigning a service temperature to any plastic should be taken with care.
• Few examples that might influence real-life service temperature of
plastics
• Duration
• Presence of water
• Transformation parameters
• Additives / fillers in polymers matrix
• Load/pressure applied
• Presence of chemical agent
• Temperature cycle applied
• Polymers chemistry …
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Service temperature
The values presented below are typical and general values intended for reference
and comparison purpose only. They should not be used as a basis for design
specification or quality control.
LLDPE
©
HDPE
©
XLPE
©
PP
©
TPE
©
PA12
©
PC
©
PA6
©
PVDF
©
Heat deflection temperature (0.45MPa) 55 60 62 85 45 150 137 185 120
Vicat softening point (10N) 105 115 120 125 75 170 145 180 165
Maximum peak temperature (air) 70 75 90 100 110 120 140 150 150
Continuous service temperature (air)
55 60 70 80 95 100 115 120 120
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Temperature resistance
Continuous service temperature in air of few commodity plastic
TPE
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What higher temperature applications
• Air ducting, (near engines)
XLPE
PP
PA6
TPE
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What higher temperature applications
• Fuel tanks: tighter spaces, under floor
No air flow,
XLPE
PA6
PA12
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What higher temperature applications
• Hot hydraulic oil tanks: return fluids
increasing in temperatures, tighter
spaces.
PP
PA6
PA12
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What higher temperature applications
• Hot water storage tanks:
PP
PA6
PA12
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Thank you for your attention.