Kynar Flex® 3121-50

Alternative and trade names
PVDF
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Description

Kynar Flex® resins are fluorinated thermoplastic copolymers.

Kynar Flex® 3121-50 is a pelletized flexible, semi-crystalline VF2 based copolymer. It can be molded or extruded and has a useful temperature range from -40°C-150°C. Kynar Flex® 3120-50 has a UL RTI of 150°C.

Kynar Flex® 3120-50 can be used in compounding for cross-linkable wire and cable as well as both wire applications requiring low temperature flexibility and high temperature resistance.

Kynar Flex® 3120-50 also finds use as a polymer processing aid (PPA) for polyolefins. The use of Kynar Flex® 3120-50 or Kynar Flex 3121-50 at 200 -1000 ppm levels reduces extruder pressure, improves surface finish, reduces die build up, and improves gauge control.

This material data has been provided by Arkema Technical Polymers.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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Properties

General

PropertyValueTesting StandardConditionComment

Coefficient of friction

0.3 [-]

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ASTM D1894

vs Steel, Kinetic

0.31 [-]

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ASTM D1894

vs Steel, Static

Density

1.75 - 1.77 g/cm³

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ASTM D792

1.78 g/cm³

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ISO 1183

dry

Limiting oxygen index

42 %

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ASTM D2863

43 %

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ISO 4589-1/-2

dry

Water absorption

0.03 %

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Sim. to ISO 62

0.03 - 0.05 %

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ASTM D570

Mechanical

PropertyValueTesting StandardConditionComment

Compressive strength

34.5 - 48.3 MPa

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ASTM D695

Elastic modulus

0.689 - 1.2 GPa

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ASTM D638

0.7 GPa

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ISO 527-1/-2

dry

Elongation

50 %

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ISO 527-1/-2

dry

min. | nominal

300 - 500 %

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ASTM D638

Elongation at yield

10 - 20 %

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ASTM D638

15 %

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ISO 527-1/-2

dry

Flexural modulus

0.621 - 0.827 GPa

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ASTM D790

Flexural strength

20.7 - 34.5 MPa

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ASTM D790

at 5% strain

Hardness, Shore D

65 - 70 [-]

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ASTM D2240

Impact strength, Charpy notched, ASTM

No Break at 23°C

ASTM D256

Impact strength, Charpy unnotched, ASTM

No Break at 23°C

ASTM D256

Tensile strength

34.5 - 48.3 MPa

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ASTM D638

Yield strength

12 MPa

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ISO 527-1/-2

dry

24.1 - 34.5 MPa

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ASTM D638

Thermal

PropertyValueTesting StandardConditionPressureComment

Coefficient of thermal expansion

0.000126 - 0.000185 1/K

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ASTM D696

Glass transition temperature

-41.1 - -39.4 °C

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ASTM D7028

-40 °C

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ISO 11357-1/-2

dry

10°C/min

Heat deflection temperature

43 - 54 °C

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ASTM D648

2 MPa

248 °F/hr

50 °C

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ISO 75-1/-2

dry

2 MPa

54 - 77 °C

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ASTM D648

0.45 MPa

248 °F/hr

Melting point

161 - 168 °C

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ASTM D3418

165 °C

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ISO 11357-1/-3

dry

10°C/min

Relative temperature index, electrical

150 °C

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UL 746B

Relative temperature index, mechanical strength

150 °C

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UL 746B

Specific heat capacity

745 - 958 J/(kg·K)

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DSC

Thermal conductivity

0.144 - 0.18 W/(m·K)

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ASTM D433

Thermal decomposition in air

375 °C

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TGA

1% wt. loss

Thermal decomposition in nitrogen

410 °C

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TGA

1% wt. loss

Flammability

At thickness 1.5 mm IEC 60695-11-10: V-0, At thickness 1 IEC 60695-11-10: V-0 and yellow card available, 5V at thickness 1 mm IEC 60695-11-20: 5VA

Electrical

PropertyValueFrequencyTesting Standard

Dielectric constant

3.2 - 10.2 [-]

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1KHz

ASTM D150

Dielectric strength

51.2 - 59.1 kV/mm

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ASTM D149

Dissipation factor

0.02 - 0.19 [-]

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100KHz

ASTM D150

Surface resistivity

5.3e+11 - 5.5e+11 Ω/sq

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ASTM D257

Optical

PropertyValueTesting StandardComment

Refractive index

1 [-]

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ASTM D542

sodium D line

Rheological Properties

PropertyValueTesting StandardConditionComment

Melt mass-flow rate

2.5 - 7.5 g/10min

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ASTM D1238

230°C/12.5kg

Melt viscosity

2000 - 2600 Pa·s

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ASTM D3835

Melt volume-flow rate

0.5 cm³/10min

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ISO 1133

dry

230°C/5kg

Technological properties

Property
Application areas

Fluoropolymer Processing Aids,Photovoltaic / Solar Film

Processing methods

Compression Molding:

  • Molding temperature (°C) ISO 293: 225
  • Molding time (min) ISO 293: 3
  • DeMolding temperature (°C) ISO 293: 120