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VICTREX™ PEEK POLYMER 381G

High performance thermoplastic material, unreinforced PolyEtherEtherKetone (PEEK), semi crystalline, depth filtered granules for specialty extrusion processes, standard flow, FDA food contact compliant, colour natural/beige.

Wire coating, extrusion of filaments, minitubes, films. Chemically resistant to aggressive environments, suitable for sterilization for medical and food contact applications.

Material Properties
Physical

Nominal Value

Unit

Test Method

Density (Crystalline)

1.30

g/cm³

ISO 1183

Spiral Flow 1

12.0

cm

Internal Method

Molding Shrinkage 2

ISO 294-4

Across Flow

1.3

%

Flow

1.0

%

Water Absorption (Saturation, 23°C)

0.45

%

ISO 62

Water Absorption - Saturation (100°C)

0.55

%

ISO 62
Mechanical

Nominal Value

Unit

Test Method

Tensile Modulus (23°C)

4000

MPa

ISO 527-1

Tensile Stress (Yield, 23°C)

98.0

MPa

ISO 527-2

Tensile Strain (Break, 23°C)

45

%

ISO 527-2

Flexural Modulus (23°C)

3800

MPa

ISO 178

Flexural Stress

ISO 178

23°C 3

165

MPa

3.5% Strain, 23°C

125

MPa

125°C

85.0

MPa

175°C

19.0

MPa

275°C

12.5

MPa

Compressive Stress

ISO 604

23°C

125

MPa

120°C

70.0

MPa

Impact

Nominal Value

Unit

Test Method

Charpy Notched Impact Strength (23°C)

6.0

kJ/m²

ISO 179/1eA

Charpy Unnotched Impact Strength (23°C)

No Break

ISO 179/1U

Notched Izod Impact Strength (23°C)

7.0

kJ/m²

ISO 180/A

Unnotched Izod Impact Strength (23°C)

No Break

ISO 180/1U
Hardness

Nominal Value

Unit

Test Method

Shore Hardness (Shore D, 23°C)

84.5

ISO 868
Thermal

Nominal Value

Unit

Test Method

Deflection Temperature Under Load

1.8 MPa, Unannealed

152

°C

ISO 75-2/Af

1.8 MPa, Annealed 4

160

°C

ISO 75-2/A

Glass Transition Temperature

ISO 11357-2

Onset

143

°C

Midpoint

150

°C

Melting Temperature

343

°C

ISO 11357-3

CLTE - Flow

ISO 11359-2

< 143°C

45

ppm/K

> 143°C

120

ppm/K

CLTE - Average

ISO 11359-2

< 143°C

55

ppm/K

> 143°C

140

ppm/K

Thermal Conductivity

ISO 22007-4

23°C 5

0.29

W/m/K

23°C 6

0.32

W/m/K

RTI Elec

260

°C

UL 746B

RTI Imp

180

°C

UL 746B

RTI Str

240

°C

UL 746B
Electrical

Nominal Value

Unit

Test Method

Volume Resistivity

IEC 60093

23°C

1.0E+16

ohms·cm

125°C

1.0E+15

ohms·cm

275°C

1.0E+9

ohms·cm

Dielectric Strength

IEC 60243-1

0.0500 mm

190.0

kV/mm

2.00 mm

23.0

kV/mm

Dielectric Constant

IEC 60250

23°C, 50 Hz

3.20

200°C, 50 Hz

4.50

Dissipation Factor (23°C, 1 MHz)

3.0E-3

IEC 60250

Comparative Tracking Index

150

V

IEC 60112
Flammability

Nominal Value

Unit

Test Method

Glow Wire Flammability Index (2.0 mm)

960

°C

IEC 60695-2-12
Fill Analysis

Nominal Value

Unit

Test Method

Melt Viscosity (400°C)

300

Pa·s

ISO 11443
Typical Processing Information
Extrusion

Nominal Value

Unit

Drying Temperature

120 to 150

°C

Drying Time

3.0 to 5.0

hr

Hopper Temperature

< 100

°C

Cylinder Zone 1 Temp.

350

°C

Cylinder Zone 2 Temp.

355

°C

Cylinder Zone 3 Temp.

360

°C

Cylinder Zone 4 Temp.

365

°C

Cylinder Zone 5 Temp.

370

°C

Extrusion Notes

Mould Temperature: 170°C to 200°C
Runner: Die / nozzle >3mm, manifold >3.5mm
Gate: >1mm or 0.5 x part thickness

Important notes:

1) Processing conditions quoted in our datasheets are typical of those used in our processing laboratories

• Data for mould shrinkage should be used for material comparison. Actual mould shrinkage values are highly dependent on part geometry, mould configuration, and processing conditions.
• Mould shrinkage differs for along flow and across flow directions. “Along flow” direction is taken as the direction the molten material is travelling when it exits the gate and enters the mould.
• Mould shrinkage is expressed as a percent change in dimension of a specimen in relation to mould dimensions.
2) Data are generated in accordance with prevailing national, international and internal standards, and should be used for material comparison. Actual property values are highly dependent on part geometry, mould configuration and processing conditions. Properties may also differ for along flow and across flow directions.

Detailed data available on our website www.victrex.com or upon request.

Notes
1Mold Temperature: 170°C, Melt Temperature: 370°C, 1.00 mm
2370°C nozzle, 170°C tool
3At yield
4200°C/4h
5Average
6Along flow

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