Furthermore, using a combination of specially developed starting raw materials and taking advantage of the up-to-date technologies and know how, Flontech is able to supply different grades of porous PTFE powders, characterized by controlled pore size and distribution, permeability and water intrusion pressure (WIP). Flontech technical assistance can give the best support in the designing of the final required characteristics and can offer tailor-made specific porous powders upon request.
Typically applied in chemical, semiconductor, automotive and packaging industry and in the field of filters and sensor (lamda sensor, headlights, injection control, airbag…), where the porous PTFE features are ideal for hostile environments.
Porous PTFE is mainly used for the production of filters (dust and water purification filters as well as precision filters for medical/clinical and life science applications ), optical parts (reflectors, spectrometers, photometers), acoustic / sound dampening components (wind screens for microphones, air regulator for speakers) and electrical / electronic insulating items.
Porous PTFE represents a competitive alternative to the expanded e-PTFE and it is characterized by the following main properties:
- Air flow rates: up to 20 l/hr/cm² at 20 mbar
- Water intrusion pressure (WIP): up to 1,2 bar
- Average pore diameter: up to 50 μm
|Typical Properties\ Grade||Test Method||Units||FT-POR-2||FT-POR-5||FT-POR-10||FT-POR-125|
|Porosity degree||-||-||Very high porosity||High porosity||Medium porosity||Low porosity|
|Physical & mechanical|
|Bulk density||ASTM D4894||g/L||750||730||710||690|
|Tensile strength (CD)||ASTM D4894||MPa||4,0||5,0||6,0||8,0|
|Elongation at break (CD)||ASTM D4894||%||40||50||60||80|
|Water intrusion pressure (P H2O)||INTERNAL||bar||0,20||0,30||0,40||0,55|
|Air Flow (ΔP 10 mbar)||ASTM D737||l/hr.cm²||2,20||1,70||0,70||0,40|
|Air Flow (ΔP 20 mbar)||ASTM D737||l/hr.cm²||4,30||3,50||1,40||0,80|
|Total pore volume||INTERNAL||/g||280,0||210,0||180,0||160,0|
|Average pore radius||INTERNAL||µm||5,0||4,0||3,0||2,5|
CD: cross direction
Specific grades are available upon request.
(1) determined on a disk of 47x1 mm
The mechanical properties have been evaluated from a 50x50 mm rod. moulded at 30 Mpa and sintered with a total time cycle of 15 hrs, with 2 hrs and 40 min at max temperature of 370°C