The waterproof and breathable membrane product line is made from a flexible, elastic microporous material—expanded polytetrafluoroethylene (e-PTFE). This PTFE microporous material boasts a high porosity and a uniform pore-size distribution, offering excellent breathability, a low coefficient of friction, and minimal adsorption. It provides not only dust‑proofing but also oil‑ and water‑repellent properties, superior thermal stability, resistance to chemical media, and UV resistance. With an exceptionally wide operating temperature range, it can maintain its breathability continuously between –40°C and +150°C.

丨Product Features
· Smooth surface, low adsorption, with a dust‑proof efficiency of 99.9%;
· Hydrophobic and oleophobic properties, effectively repelling water and oil;
· Porous structure reduces salt crystal formation and prevents condensation.
· Continuous air permeability and pressure equalization reduce the pressure exerted on the housing’s sealing strip.
· With an IP68 protection rating, it effectively safeguards sensitive components.
· Chemically inert, corrosion-resistant, and UV-resistant;
· Insulating, high-temperature resistant, and aging-resistant.

丨Application Advantages
· Custom-sized welded waterproof and breathable membrane sheets available to meet customers’ product requirements.
· Voir provides comprehensive welding solutions and leak-testing solutions:
· For specific details on the welding of waterproof and breathable membranes to various housings, please consult Voir Technology.

Voir Theoretical calculation
Voir Pressure conversion
Voir Volume conversion

bar：	Kpa：	bpa：
mbar：	Pa：	atm：
mmHg：	psi：	psf：
inHg：	kgf/cm²：	kgfcm²：
mmHg：

m³：	hl：	L：
ml：	mm³：	gal：
cu ft：	cu in：	cu yd：

Before work （T1）：	Long（mm）：		Voir is the leading supplier of protective ventilation solution products, On-site quantification, theoretical model derivation, If you want to learn more Please call：+86 400-6136683 www.voir-tech.com.cn
After work（T2）：	Wide（mm）：
Temperature（△T）：	High（mm）：
	Volume（mm³）：

After heating(Kpa)：	After heating(mm³)：
△Air pressure(Kpa)：	△Air volume(mm³)：
Balance time(min)：		mm³/min

Manufacturing Base: No. 8, Hexin Road, Ma’an Town, Huicheng District, Huizhou City, Guangdong Province
R&D Centers: Shenzhen | Hangzhou | Wuhan

Phone:+86 0752-5310684
Mobile phone:+86 18575268892
Email:s7@voir-tech.com.cn

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