PET Bar Grade - Plastics - Righton Blackburns

A polyester material with a relatively high density.

PET has a unique combination of properties and has better wear and abrasion resistance than nylon or acetal, wet or dry. It also has significantly better dimensional stability and low thermal expansion rate plus good electrical properties.

Its superior chemical resistance, non staining characteristics, and distinct lack of centerline porosity, makes it a desirable material for a variety of applications especially in the food industry that might involve solvents, cleaning chemicals, or direct food contact.

Due to its good creep strength, low moisture absorption and outstanding dimensional stability, PET plastic material is extremely well suited for applications where complex parts and the highest requirements regarding dimensional accuracy and surface quality are needed. The thermal properties of PET support a good temperature stability as well as dimensional stability.

Range

Product Form	Size Range
Round Bar	10.0mm - 200.0mm

If you do not see what you are looking for, please contact your local service centre with your specific requirements.

Properties

Properties are for natural bar.

Property	Parameter	Test Method	Value
Mechanical Properties
Modulus of Elasticity	1mm/min	DIN EN ISO 527-2	3300 MPa
Tensile Strength	50mm/min	DIN EN ISO 527-2	91 MPa
Elongation at Break	50mm/min	DIN EN ISO 527-2	14%
Flexural Strength	2mm/min, 10 N	DIN EN ISO 178	134 MPa
Compression Modulus	5mm/min, 10 N	EN ISO 604	2500 MPa
Charpy Impact Strength	max 7.5J	DIN EN ISO 179-1eA	150 kJ/m²
Ball Indentation Hardness	ISO 2039-1	194 MPa
Thermal Properties
Melting Temperature	DIN EN ISO 11357	244 °C
Service Temperature	Short Term	NN	170 °C
Service Temperature	Long Term	NN	110 °C
Thermal Conductivity	ISO 22007-4:2008	0.31 W/(k*m)
Specific Heat	ISO 22007-4:2008	1.2 J(g*K)
Electrical Properties
Surface Resistivity	DIN IEC 60093	10¹⁴ Ohm
Volume Resistivity	DIN IEC 60093	10¹⁴ Ohm*C
Resistance to racking (CTI)	DIN IEC 60112	600 V
Other Properties
Water Absorption	24h/96h (23 °C)	DIN EN ISO 62	0.03%
Flammability (UL94)	DIN IEC 60695-11-10	HB
Density	1.39 g/cm³

Additional Information

Comparison with Other Material

PET Compared with Acetal	PET Compared with Nylon 66
It machines almost as well	PET machines much better than nylon
It’s over 30% stronger	A similar or better surface finish
It’s around 25% more rigid	It’s 8% stronger
10 degrees better short term working temperature and 30 degrees better long term	It's 10% more rigid
25% lower thermal expansion rate	Has a 10 degree advantage for the short term working temperature
60% less moisture absorption	50% lower thermal expansion rate
Has a similar coefficient of friction	10x (ten times) less moisture absorption
Has a much better wear resistance	Has a similar coefficient of friction
Is approx 40% more expensive	As good if not better wear resistance
Is approx 50% more expensive

Applications

Electronic industry: Cases, covers, switches, insulation panes and coil bodies
Automotive industry: Cases, screen wiper arms and door handles
Medical industry: Functional parts in drug dosing systems
Mechanical engineering: Gears and sliding elements
Food industry: Guidance, slide bar, stop units, rollers and grabbers

Characteristics

High strength
High rigidity and hardness
Very low moisture absorption
Good creep resistance
Low sliding friction and sliding wear
Resistant to hydrolysis (up to +70 °C)
Not suitable for contact with media containing >50% alcohol
Good chemical resistance against acids
Good adhesion and welding ability
Suitable for food contact
Good machinability
Electrically insulating

Plastics, Engineering PlasticsPET Bar