|
Applications for PVDF (Kynar®, Solef®) Film:
• Filters • Fuel Cell Seals • Medical bags • Diaphragms • Release Films • Piezoelectric films • Chemical Resistant Tank Linings • Possible substitute for Tedlar®
|
Advantages of PVDF (Kynar®, Solef®) Film:
• Excellent chemical resistance • Stable to UV & effects of weather • Low NBS smoke generation & superior LOI • Excellent transmittance of solar energy • Excellent dielectric strength • High Heat Resistance • Excellent Physical & mechanical properties • Resin FDA compliant • FM 4910 approved |
Kynar®, Solef®
is strong and tough as reflected by its tensile properties and
impact strength. Compared to many thermoplastics, PVDF (Kynar®,
Solef®)
has excellent resistance to creep and fatigue, yet in thin
sections such as films, PVDF (Kynar
®)
components are flexible and transparent.
PVDF
(Kynar®, Solef®) is
a possible substitute for Tedlar®
(ask for info).
Also available with adhesive:
Kynar®, Solef®
KynStick® Tape With ADHESIVE
The following physical property information is based on typical values of the base Kynar® 740 resin as well as test results obtained from actual film testing.
GENERAL INFORMATION:
Adhesive Bonding:
PVDF (Kynar®, Solef®) can be bonded to a variety of substrates including itself and metals with bond strengths ranging from 50-800 psi. These systems are designed to perform under harsh chemical environments. Three 2-part epoxy based adhesive systems are recommended for use with PVDF (Kynar®, Solef®):
|
Adhesive |
Adhesive |
|
System |
Type |
|
Araldite ® |
Epoxy |
|
|
|
|
Hysol® |
Epoxy |
|
|
|
|
BONDIT® |
Epoxy |
|
B45 TH |
|
|
Adhesive improves if surface of PVFD film is corona treated or modified with a treatment of primary amine or fuming sulfuric acid. |
|
|
|
|
Welding: PVDF
(Kynar®, Solef®) Film
can be fusion
welded several ways: Ultrasonic, hot lamination, resistance
heating, spin welling & radio frequency
. These methods have all been used
to bond PVDF to itself with limited success. Most successful
approach to welding of PVDF film are heat contact welding & hot
gas or air using welding rod.
Outgassing: PVDF (Kynar®, Solef®) exhibits extremely low weight loss when exposed to high vacuum.
Light Transmittance: Where opacity and transparency of films are important, light transmission can be a determining factor for the proper film choice. Light transmittance=93%
Permeability to Gases: PVDF (Kynar®, Solef®) film = Low permeability to water vapor & various other gases.
|
Gases |
CC-mils/100 in 2/24 frs - atm |
|
CO2 |
5.5 |
|
Nitrogen |
9.0 |
|
Oxygen |
14.0 |
|
Water Vapor |
2.6 (g-mil) |
Data Sheet - Kynar®, Solef® Film
|
Mechanical |
Units |
ASTM Test |
Result |
|
Tensile Strength @yield |
psi |
D882 |
7,550 |
|
Elongation @break |
% |
D882 |
160 |
|
Tensile Modulus |
psi |
D882 |
250,000 |
|
Flexural Modulus |
psi |
D790 |
260,000 |
|
Tear Strength - prop. |
g/mil |
D1004 |
735 |
|
Thermal |
|
|
|
|
Continuous Use Temp.-UL |
°F |
- |
265 |
|
Heat Deflection Temperature @264 psi |
°F |
D648 |
244 |
|
Melt Temp.-DSC |
°F |
- |
329-338 |
|
Glass Transition Temp. |
°F |
D3418 |
- |
|
Flammability |
|
|
|
|
UL Rating-UL94 |
- |
- |
VTM-0 |
|
L.0.1. |
% |
D2863 |
43 |
|
NBS Smoke |
Dmax |
E662 |
- |
|
Electrical |
|
|
|
|
Surface Resistivity |
Ohms |
D257 |
>101, |
|
Dielectric Strength @.003" |
V/mil |
D149 |
1,930 |
|
Dielectric Constant |
1 KHz |
D150 |
8.15-10.46 |
|
Dissipation Factor |
1 KHz |
D150 |
0.005-0.019 |
|
Other |
|
|
|
|
Specific Gravity |
- |
D792 |
1.78 |
|
Water Absorption |
%/24 hr. |
D570 |
0.01 |
|
Refractive Index |
- |
- |
1.42 |
|
Haze |
% |
D1003 |
- |
|
Area Factor |
in 2/Ib/mil |
- |
15,480 |
