Kynar Flex® 3121-50 America

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 High Performance 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

PropertyTemperatureValueComment

Abrasion resistance, weight loss

16 - 19 mg

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ASTM-G195-13A, CS 17 1000g:pad, 1000 cycles

Coefficient of friction, kinetic

0.3 [-]

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ASTM D1894, vs Steel

Coefficient of friction, static

0.31 [-]

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ASTM D1894, vs Steel

Density

23.0 °C

1.75 - 1.77 g/cm³

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ASTM D792

Limiting oxygen index

23.0 °C

42 %

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ASTM D2863

Water absorption

23.0 °C

0.03 - 0.05 %

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ASTM D570

Mechanical

PropertyTemperatureValueComment

Compressive strength

23.0 °C

34.5 - 48.3 MPa

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ASTM D695

Elastic modulus

23.0 °C

0.69 - 1.17 GPa

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ASTM D638

Elongation

23.0 °C

300 - 500 %

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ASTM D638

Elongation at yield

23.0 °C

10 - 20 %

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ASTM D638

Flexural modulus

23.0 °C

0.62 - 0.83 GPa

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ASTM D790

Hardness, Shore D

23.0 °C

65 - 70 [-]

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ASTM D2240

Tensile strength

23.0 °C

34.5 - 48.3 MPa

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ASTM D638

Yield strength

23.0 °C

24.1 - 34.5 MPa

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ASTM D638

Impact strength, Charpy notched, ASTM

No Break @ 23°C, ASTM D256

Impact strength, Charpy unnotched, ASTM

No Break @ 23°C, ASTM D256

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

23.0 °C

1.26E-4 - 1.85E-4 1/K

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ASTM D696

Glass transition temperature

-41.1 - -39.4 °C

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ASTM D7028

Heat deflection temperature, 0.45 MPa

54.4 - 76.7 °C

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ASTM D648, 248 °F/hr

Heat deflection temperature, 1.80 MPa

43.3 - 54.4 °C

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ASTM D648, 248 °F/hr

Melting point

161 - 168 °C

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ASTM D3418

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

23.0 °C

745 - 958 J/(kg·K)

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DSC

Thermal conductivity

23.0 °C

0.14 - 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

PropertyTemperatureValueComment

Dielectric constant, 1KHz

23.0 °C

3.2 - 10.2 [-]

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ASTM D150

Dielectric strength

23.0 °C

51.2 - 59.1 kV/mm

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ASTM D149

Dissipation factor, 100kHz

23.0 °C

0.02 - 0.19 [-]

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ASTM D150

Surface resistivity

23.0 °C

5.30E+11 - 5.50E+11 Ω/sq

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ASTM D257

Optical

PropertyValueComment

Refractive index

1.41 [-]

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ASTM D542, sodium D line

Rheological Properties

PropertyTemperatureValueComment

Melt mass-flow rate

2.5 - 7.5 g/10min

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ASTM D1238, 230°C/12.5kg

Melt viscosity

23.0 °C

2000 - 2600 Pa·s

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ASTM D3835

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