When sourcing performance membranes, buyers often assume: "the higher the breath ability (MVTR), the better the film."
However, in heavy-duty work wear, medical barriers, and industrial packaging, the priority is clear: impenetrable liquid protection combined with controlled micro-moisture release is far more critical than rapid sweat evacuation.
Here is what you need to know about Low MVTR (300–1,200 g/m²/24h) non-porous TPU films.
1. How It Works: Zero-Pore Liquid Barrier
Unlike conventional micro porous membranes, Low MVTR TPU is an engineered, dense, non-porous monolithic film:
• Zero Liquid Penetration: Without physical micro-holes, liquids (water, blood, oils, chemicals) cannot penetrate-even under hydro static pressure exceeding ≥10,000 mm H₂O.
• Solid-State Molecular Diffusion: Moisture vapor is transported outward at a molecular chain level, preventing internal condensation, mold, and humidity buildup.
Key Takeaway: External liquids cannot enter, while internal micro-vapor safely escapes.
2. Quick Comparison: Low MVTR vs. High MVTR Membrane
|
Performance Metric |
Low MVTR TPU Film (Non-Porous) |
High MVTR Film (Micro porous) |
|
Membrane Structure |
Dense monolithic (solid, zero pores) |
Micro porous (open channels) |
|
Waterproof Rating |
≥ 10,000 mm H₂O (Heavy-duty barrier) |
< 3,000–5,000 mm (Risk of leaks) |
|
Moisture Permeability |
300 – 1,200 g/m²/24h (Controlled micro-release) |
5,000+ g/m²/24h (Rapid sweating) |
|
Barrier Performance |
Complete barrier to blood, chemicals, oils |
Liquids and bacteria can migrate |
|
Durability & Flex |
High tear & puncture resistance; -30°C flexible |
Prone to tearing and cold cracking |
|
Ideal Applications |
Heavy PPE, medical covers, ocean freight, tent floors |
Running wear, lightweight casual apparel |
3. Top 4 Industrial Applications
1. Heavy-Duty Rainwear & Protective Work wear: Withstands driving storms and high-pressure washing without leaks, while venting micro-sweat to eliminate humid discomfort.
2. Medical Barriers & Waterproof Mattress Covers: OEKO-TEX® Standard 100 Class 1 certified, impermeable to pathogens and body fluids, and resistant to repeated sanitization.
3. Moisture-Proof Maritime & Industrial Packaging: Seals out saline sea spray while balancing internal humidity to protect precision CNC machinery and electronics from corrosion.
4. Outdoor Tent Floors & Inflatable Dry Bags: Exceptional puncture resistance, flexible down to -30°C, and fully compatible with high-frequency welding for 100% leak-proof seams.
4. Sourcing & Customization with Leo TPU Film
When choosing a manufacturing partner for your fabric lamination or protective gear, Leo TPU film provides:
• Tailored Specifications: Thickness range from 0.012mm to 0.15mm, customization widths up to 2,200mm, and custom colors/hardness.
• Verified Quality & Compliance: Full Technical Data Sheets (TDS), REACH/Roes compliance, and OEKO-TEX® certification reports.
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Request Free Samples & Technical Support
Contact our sales engineering team today for free A4 swatches, trial sample rolls, and custom membrane matching solutions.
👉 Email : lee@leo-newmaterial.com|https://www.leo-newmaterial.com/
