Physical Characteristics:

1. Air pemeability

SST-Porous®adhesive &BD 03 series 3ATM &5 ATM high water pressure resistance membrane, made of SST-Porous® high water pressure resistant PTFE membrane and supported material of modified polyester non-woven fabric,  combined with acrylic double-sided adhesive by precise hot processing  to form a adhesive high water pressure resistant breathable membrane.  The vent ensures high water pressure resistance and keep good air permeability to effectively ensure the pressure equalization(pressure compensation)– This difference in pressure will impair the effectiveness of gaskets and seals in the electronics and ultimately result reduction in liquid penetration resistance. 

• SST-Porous® adhesive BD 03 series（5ATM）membrance characteristic (Before Application)：

Typical Airflow： > 100 ml/min/cm2（at ΔP = 70 mbar, RT）

• SST-Porous®adhesive BD 03series（3ATM）membrane (Before Application)：

Typical Airflow： > 300 ml/min/cm2（at ΔP = 70 mbar, RT）

2. Water resistant

SST-Porous® BD 03  serial–3ATM &5 ATM high water pressure resistance membrane,  as the composition of “fiber” and “node” network structure, the vents not only with excellent permeability performance but outstanding water resistant.

SST-Porous® BD 03  serial–3ATM &5 ATM high water pressure resistance membrane  (Before Application)：

3.  Hydrophobic & oleophobic 

SST-Porous® could supply hydrophobic and Oleophobic to meet different application requirement. As it’s Oleophobic characteristic, the protection vent could maintaining airflow even after contact with high-viscous or low surface-tension liquids.

※  BD 03 serial characteristic (Before Application):

 Oleophobic rate from 1 to 8  (according to AATCC 118)

4  Weldability

SST-Porous®BD 03 series, The breathable venting could be mounted on the plastic housing by means of thermal melt or ultrasonic welding.

• Common type of plastic that could be welded

ABS，PBT，PP，HDPE，PA6，PC etc.

• Temperature of thermal welding

The temperature mainly depends on the melting point (Tm) of the plastic, generally 30~50℃ higher than selected plastic TM can be smoothly welded.

5  High adhesive strength

SST-Porous®BD o3 series high water pressure resistant breather membrane,  the designed double-sided adhesive, in addition to its good adhesive with low surface enery of PTFE  , but also take into account the viscosity of the surface with different materials.

※ Adhesion Properties of Adhesive

Adhesive strength according to FINAT FTM 1, RT Steel (after 24 h) ：      > 19 N/25 mm

6 Withstanding low and high temperature

Continuous Operating Temperature Range: -40 °C to +130 °C (when adhered)

Explanation：      

• the venting usage temperature mainly depends on the temperature of adhesive or the venting base material；
• if special temperature required, SST could supply adhesive venting with more wider range of temeprature.

7  Free of PFOA

SST-Porous®BD S00 serial, adhesive venting in white color,  the membrane used is e-PTFE material different from PTFE material, it’s obtained from suspension liquid, no need emulgator PFOA (PFOA suspected having carcinogenic effects), so BD S00 serials dont have PFOA.

And，if specified SST-Porous® BD 03 series Adhesive vent , we could choose eco-friendly emulgator prepared by PTFE dispersion raw materials, thus, SST-Porous® waterproof and breathable membranes do not contain PFOA.

8 Customizability

SST-Porous®BD 03 series Adhesive vent, the double-sided adhesive composition, package method, size, and shape could be customized.

※Vent size OD&ID option: OD size: 2~30 mm ID  size: 1~28 mm Attention：   SST could produce the adhesive venting according to customer drawing or sample.

※Supply Mode

Typical application

※  Wearable devices

※  Mobile phone

※ Digital project

※ Bluetooth earphone

※ Underwater camera

Handling / Installation guide

SST-Porous®BD 03 series Adhesive protection vents, it is a high-tech products that need professional final-processing.

Please contact us when planning to enter your manufacturing process, not all final-processings are compatible with this product. We will be pleased to offer our expertise in this field to you.

   ①Installation Surface

Recommended Surface roughness：Rz＜10µm（max：Rz＜16μm）。

Mounting surfaces should be dry and clean and free of oils, particles, release agent and other contaminants. the loose oxide layer on the surface will reduce the durability.

  ② Recommeded cleaning

Grease free solvent, like heptane, isp[ropanol or alcohol.

In case of incompatibility, select another cleaning agent for the application surface.

  ③Pressure sensitive adhesive operation guide

Press fit——suitable for semi-automatic installation

To achieve excellent press fit design and to obtain appropriate pressure，please follow the general recommendations as below:

• Pressing head shall be made by soft rubber of uniform thickness and at least 0 mm thickness（Shore hardness A  20 — 40 )
• The pressing head shall be vertical to the mounting surface and located in a position to apply pressure to the target/guard ring
• Accoding to the size of adhesive area, apply uniform pressure 7 bar recommended to the adhesive ring to seal device or housing. The pressure on the surface of the pressing head should be appropriate to avoid pressing into the venting area
• After pressing, the dwell time should exceed 5 seconds
• Allow at least 24 hours dwell time before using or testing the vent
• The above steps are very important to ensure the vent sealed on the housing firmly

Press fit——suitable for manual installation

• Ensure the entire adhesive ring is attached to the surface of the device or housing
• Apply light finger pressure to the adhesive ring at least two circles to assure the seal to the device or housing, be carefull not touch the central part of the vent
• Allow at least 24 hours dwell time before using or testing the vent
• The above steps are very important to ensure the vent sealed on the housing firmly