Service Temperature for Rotomoulding polymers

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Service Temperature for Rotomoulding polymers

Star Asia 2017

Les Druyf


Rotomoulding


Rotomoulding

• Diverse

• Different

• Dynamic


Rotomoulding

• Pushing the boundaries further each year.

• More intricate shapes

• Tougher environments

• Increased mechanical properties

Higher temperatures


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?


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.


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 …


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


Temperature resistance

Continuous service temperature in air of few commodity plastic

TPE


What higher temperature applications

• Air ducting, (near engines)

XLPE

PP

PA6

TPE



• Fuel tanks: tighter spaces, under floor

No air flow,

XLPE

PA6

PA12



• Hot hydraulic oil tanks: return fluids

increasing in temperatures, tighter

spaces.

PP

PA6

PA12



• Hot water storage tanks:

PP

PA6

PA12


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may not be used, reproduced or disclosed to any other parties without the prior permission of Schulman.

The information contained in this document is based on data believed to be reliable on the date compiled,

but Schulman does not represent, warrant, or otherwise guarantee, expressly or impliedly, the

merchantability, fitness for a particular purpose, suitability, accuracy, reliability, or completeness of this

information or the products, materials, or processes described. The user is solely responsible for all

determinations regarding any use of material or product and any process in its territories of

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Thank you for your attention.

Service Temperature for Rotomoulding polymers

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