PVDF Tubing Properties

PVDF (KYNAR®) is generally used in applications requiring the high purity, strength, and resistance to solvents, acids, bases and heat. Compared to other fluoropolymers, like PTFE, PFA, FEP, it has an easier melt process because of its relatively low melting point of around 177°C.

KYNAR® is a registered trademark of Arkema, Inc

Maximum Usage Temperatures for PVDF

Lower Chain Length Improved Flow
Strong Inter-chain Forces Higher Modulus and Strength
Alternating C-H and C-F Structures Improved Flammability


PVDF – Poly (vinylidene fluoride) - TYPICAL PROPERTIES

Property Value Units Method
MECHANICAL PROPERTIES
Tensile Strength, 73°F, at break 5075 - 7250
35 - 50
psi
MPa
D 638
Elongation at break, 73°F 20 - 50 % D 638
Flexural Strength, 73°F 2100
11165
psi
MPa
D 790
Impact Strength, Izod, 23 deg C, notched, 4mm thick 2.25
120
Ft-lbf/in
J/m
D 256
Yield StrengthAt 23 deg C 7685 - 8265
53 - 57
psi
MPa
D 638
Density 1.78 gm/cu.cm  
Coefficient of friction, static 0.2 to 0.4   D 1894
THERMAL PROPERTIES
Coefficient of Linear Expansion 12 – 14 x 10-5 K-1 D 696
Melting Point 343
173
deg F
deg C
D 3418
Thermal Conductivity 1.39
0.2
Btu/hr-.ft-deg F
watt/meter-K
ASTM C 177
Specific Heat, at 300 deg K 0.287 – 0.382
1.2 – 1.6
Btu/lb/deg F
kJ/Kg/deg K
 
Heat Distortion Temperature, 66 lb/sq.in (0.455 MPa), 4 mm thick 293
145
deg F
deg C
D 648
Service Temperature to 302
to 150
deg F
deg C
 
Processing Temperature   deg F
deg C
 
ELECTRICAL PROPERTIES
Surface Arc-Resistance   sec D 495
Volume Resistivity > 1014 ohm-cm D 257/DIN 53483
Surface Resistivity, @ 100% RH > 1014 Ohm sq-1 D 257/DIN 53483
1MHz, 23 deg C 7 ε D150-81
OTHER PROPERTIES
Flame Rating+ V-0 Class UL-94
Refractive Index 1.41 – 1.42 nD 25 D 542
Limiting Oxygen Index 44 % Oxygen D 2863
Water Absorption, 230 deg C, 10 Kg < 0.04 gm/10 min D 1238
Specific Gravity 1.78   ISO 1183

Value decreases with increasing thickness of test specimen

+ Numerical rating for flame spread is not intended to reflect hazards presented by this or any other material under actual fire conditions

NOTE: The information, recommendations and opinions contained herein is only a guide and is intended solely for your consideration, inquiry and verification. The suitability of any material under specific conditions of application is not guaranteed in any manner. Fluorotherm Polymers Inc does not assume legal responsibility for the use of data presented here in any form, under any circumstances, any application, test or communication. Nothing contained herein is to be interpreted as a license or authorization to operate under or infringe any patent.