SST-Porous ® BD T series vent caps / vent plug / vent cap made by SST porous® ePTFE membrane and thermoplastic elastomer welded together by ultrasonic or hot pressing process, after then assemblied with polypropylene shell cover.
The whole component has new functions and characteristics, reduces the cost, and can realize one click installation.
SST-Porous® BD T series Vent Caps are developed independently, made by SST porous ® ePTFE membrane( with PP+PE support layer ) welded together with thermoplastic elastomer (EPDM, TPE and other materials) by ultrasonic or hot pressing and combined with PP shell cover. Porous ePTFE material is protected by PP shell cover, which can prevent it from puncture, collision and other injuries, improving service life, safety, reliability and durability of the product. The whole component has new functions and characteristics of reducing the cost, and realizing one click installation.
※ With excellent water resistance, airflow, hydrophobic and oleophobic characteristics
※ Easy to install
SST-Porous® BD T series Vent Caps Structural diagram
SST-Porous® ePTFE Membrane (with no woven polyester support) Microscopic morphology and its working principle
SST-Porous® BD T series Vent Caps，according to the difference airflow, vents is identified by different color of black, gray or brown polypropylene (PP) outer cover.
Product general categories are described in the table as below ：
|The PP outer cover is black-small air permeability||The PP outer cover is of gray-medium air permeability||The pp outer cover is brown- -with large air permeability|
|Typical Airflow||> 500 ml/min/cm2||> 10000 ml/min/cm2||> 15000 ml/min/cm2|
※ The permeability test is the permeability size before use (before application)
※ Test the pressure difference ，at ΔP = 70 mbar, RT
SST-Porous® BD T series Vent Caps, with SST-Porous® ePTFE membrane laminated with no woven polyester layer welded on . Due to the network structure of ePTFE membrane composed of “fiber” and “node”, it not only has excellent ventilation effect, but also has excellent waterproof effect.
|Back PP outer cover –
|Brown PP outer cover —
|Water entry point (WEP)||> 500 kPa||—|
|IP65/ IP66（Depending on the installation structure）、IPX7、IPX8、IP69K||IP54|
※ Water entry point (WEP) test is the test value before application . unit：kPa
※ Test condition，Dynamic WEP 30 sec, RT
※ Protection against foreign particles, water, and touching according to ISO 20653:2013
In order to meet different application’s requirements, SST porous ® ePTFE membrane (with no woven polyester support layer) can provide hydrophobic and oleophobic modification. When facing low surface tension liquid, the Vent Caps can meet the function of water and oil drainage in the application where there is possibility of contacting oil stains.
※SST-Porous® BD T series Vent Caps characteristic(s) (Before Application)：
Oleophobic rate： 8 (according to AATCC 118)
SST-Porous® BD T series Vent Caps，
with Characteristics of high and low temperature：-40 °C to +120 °C (after installed)
The material used in SST-Porous® sPTFE is different from the PTFE raw material used in ePTFE. It is obtained from suspension and does not need emulsifier perfluorooctanoic acid (PFOA) (PFOA is suspected to have carcinogenic effect). Therefore, if SST porous in the component ® s-PTFE membrane (no woven with polyester support) adopts s-PTFE type membrane, SST-Porous® BD T series Vent Caps do not contain PFOA harmful substances.
For specially designated, SST porous ® e-PTFE membrane (no woven with polyester support) can select PTFE dispersed raw materials prepared by environmental friendly emulsifiers, so as to make SST-Porous® BD T series Vent Caps do not contain PFOA.
SST-Porous ® BD T series vent caps can be customized in different inner hole installation aperture, different types of thermoplastic elastomer, different PP outer cover color, different air permeability and different IP ratep.
Mainly depends on different ePTFE membrane type.
SST-Porous ® BD T series vent caps typical size
|Breathable cap (cover) product description|
|Dimensions||6.8mm; 7.8mm; 9.5mm; 12.5mm
（Thermoplastic elastomer internal diameter）
Black, Blue, Gray
|Large package||1000 pieces / bag|
|Small package||500 pieces / bag|
|Sample loading||5 pieces / bag|
※ Fog lamp
※ Tail lamp
※ Special central high brake lamp etc