Kynar® 370

Alternative and trade names
PVDF
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Description

Kynar® resins are fluorinated thermoplastic homopolymers.

Kynar® 370 resin is a thermoplastic fluorinated polymer resin. The properties are the same as standard grade: chemical resistance, resistance to UV, low permeation, high purity, excellent mechanical behavior with a higher HDT. This grade is especially modified in order to have a reduced mold shrinkage, low thermal expansion factor. Moreover, this grade has an increased thermal and electrical conductivity. This grade is available as pellet form for injection, extrusion, compression.

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 StandardComment

Coefficient of friction

0.12 [-]

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ASTM D1894

vs Steel, Kinetic

0.18 [-]

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ASTM D1894

vs Steel, Static

Density

1.84 - 1.88 g/cm³

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ASTM D792

Limiting oxygen index

44 %

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ASTM D2863

Water absorption

0.02 %

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Sim. to ISO 62

Mechanical

PropertyTemperatureValueTesting StandardConditionComment

Compressive strength

138 - 172 MPa

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ASTM D695

Elastic modulus

3.1 - 5.2 GPa

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ASTM D638

Elongation

0 - 20 %

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ASTM D638

Elongation at yield

0 %

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ASTM D638

4 %

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ASTM D638

Flexural modulus

5.5 - 6.9 GPa

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ASTM D790

Flexural strength

138 - 207 MPa

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ASTM D790

at 5% strain

Hardness, Shore D

74 - 79 [-]

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ASTM D2240

Impact strength, Charpy notched, ASTM

23 °C

40 - 80.1 J/m

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ASTM D256

Impact strength, Charpy unnotched, ASTM

23 °C

267 - 534 J/m

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ASTM D256

Tensile strength

37.9 - 55.2 MPa

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ASTM D638

Yield strength

34.5 - 55.2 MPa

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ASTM D638

42 MPa

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ISO 527-1/-2

dry

Thermal

PropertyValueTesting StandardConditionPressureComment

Coefficient of thermal expansion

3.6e-05 - 4.5e-05 1/K

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ASTM D696

4e-05 1/K

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ISO 11359-1/-2

dry

Glass transition temperature

-40.6 - -38.3 °C

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ASTM D7028

-40 °C

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ISO 11357-1/-2

dry

10°C/min

Heat deflection temperature

110 - 127 °C

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ASTM D648

2 MPa

248 °F/hr

120 °C

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ISO 75-1/-2

dry

2 MPa

132 - 149 °C

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ASTM D648

0.45 MPa

248 °F/hr

Melting point

165 - 170 °C

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ASTM D3418

170 °C

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ISO 11357-1/-3

dry

10°C/min

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 1.6 mm IEC 60695-11-10: V-0, At thickness 0.8 mm IEC 60695-11-10: V-0

Electrical

PropertyValueFrequencyTesting StandardCondition

Dielectric constant

28.8 - 33.5 [-]

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1KHz

ASTM D150

33 [-]

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100Hz

IEC 60250

dry

Dissipation factor

0.06 - 0.08 [-]

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100KHz

ASTM D150

0.061 [-]

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100Hz

IEC 60250

dry

Volume resistivity

1e+11 Ω·cm

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ASTM D257

65% RH

1e+13 Ω·cm

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IEC 60093

dry

Rheological Properties

PropertyValueTesting StandardConditionComment

Density of melt

1.88 g/cm³

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Melt mass-flow rate

5 - 17 g/10min

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ASTM D1238

230°C/3.8kg

Melt viscosity

800 - 1300 Pa·s

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ASTM D3835

Melt volume-flow rate

5.8 cm³/10min

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ISO 1133

dry

230°C/3.8kg

Shrinkage

0.7 %

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ISO 294-4

dry

0.7 %

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ISO 294-4

dry

Transverse

Technological properties

Property
Application areas

Chemical Process Industry

Processing methods

Injection Molding:

  • Melt temperature (°C) ISO 294: 230
  • Mold temperature (°C) ISO 10724: 90
  • Injection velocity (mm/s) ISO 294: -
  • Pressure at hold (MPa) ISO 294: -