Comparative Fluorocarbon Matrix

Property

PTFE

PFA

FEP

ETFE
Tefzel®

ECTFE
Halar®

PVF

CTFE
Aclar®

Specific Gravity

2.15

2.16

2.15

1.70

1.68

1.77

2.13

Tensile Strength @ Brk., RT, %

5000

4500

3000

6500

7000

4500

4000

Elongation @ Brk., RT, %

400

300

290

150

200

50

140

Flex Strength, psi

No Brk.

N.A.

3000

7100

7000

9500

8600

Flexural Modulus, psi x 10⁵

.7-1.1

1.0

0.9

2.0

2.4

2.5

1.5

Hardness (Shore, Rockwell)

D50-65

D60

D55, R45

D75, R50

D75, R95

R109

R109

Izod Impact Ft/Lbs/In - Notch, RT

3

No Brk.

No Brk.

No Brk.

No Brk.

4

1.2

Melt Point, ÅF

627

575-590

500-535

520

465

340

394

Max. Oper. Temp., Continuous ÅF

550

500

400

350

340

265

350

Low Temp. Embrittlement, ÅF

-450

N.A.

-100

-150

-105

-80

-423

Deflection Temp., ÅF @ 66 psi

250

N.A.

158

220

240

270

258

Deflection Temp., ÅF @ 264 psi

120

N.A.

N.A.

160

170

195

N.A.

Thermal Expansion, 10^-5/In/ÅC

10.0

12

9.5

7

8

8.5

7.2

Dielectric Strength, V/mil (.001")

4200

4000

6500

7000

2000

1280

3500

Dielectric Constant, 10³ cycles

2.1

2.1

2.1

2.6

2.6

7.7

2.5

Dissipation Factor, 10³ cycles

<.0003

.0002

<.0002

.0008

.0015

.018

.025

Water Vapor Permeability (ranked)

5

6

5

4

2

3

1 (best)

Chemical Resistance
(ranked)

1

1

1

2-3

2

4

2

Coef. of Friction

1

2

3

4

4

5

5

NOTE:  The above data chart is nominal and is intended solely for the purpose of selecting the most proper film for a particular application.  When thermoformed these films may exhibit dimensional characteristics not discussed or measured above.  Residual stresses left in the film from the thermoforming process can effect the maximum use temperature.