Air Permeable Breather Membranes

Manufactured by Xiashi Packing Co., Ltd., the Jinbo series of Air Permeable Breather Membranes addresses the limitations of fully sealed building materials. The membranes are widely applied to pitched roofs, vertical joint metal roofs, steel plate composite roofs, and exterior wall enclosure systems, serving industrial plants, sports stadiums, commercial complexes, and residential construction projects.

How the Membrane Works

This Air Permeable Breather Membranes adopts micro pore screening and vapor-transmission technology. The membrane structure contains countless microscopic pores. Liquid raindrops and dew droplets are typically much larger than the membrane's micropores, while surface tension further limits liquid water penetration. In contrast, much smaller water vapor molecules are only about 0.0004 μm in size and can diffuse outward through the membrane when a vapor pressure difference exists between the interior and exterior sides.

Its S-shaped embossed texture enhances material toughness, shrinkage resistance, abrasion resistance and slip resistance, helping reduce the risk of damage during handling and on-site installation.

Key Performance Features

● High Temperature Resistance: Maintains stable performance at operating temperatures up to 80 °C under specified application conditions.

● Low Temperature Flexibility: Retains ≥5% elongation at -40 °C, reducing risks of brittle failure in cold environments.

● Chemical Resistance: Offers good resistance to common acids, alkalis and selected chemical media, subject to specific concentration and exposure conditions.

● Biological Resistance: The material is engineered to resist common biological degradation and sustain stable long term performance within building envelope applications.

● Durability & UV Aging Resistance: Has undergone accelerated UV and high temperature aging testing. Relevant test documentation is available upon request. Equivalent to up to 6 months of UV exposure under the specified test conditions*.

● Flame Retardancy: Classified as B2 according to the applicable Chinese classification requirements.

● Recyclable Material: Manufactured using recyclable polypropylene based raw materials, supporting more sustainable material selection in building projects.

Core technology

Typical Application Scenarios

Roofing Systems Installed above insulation layers and paired with suitable vapor-control layers, the Air Permeable Breather Membranes helps manage moisture movement within the roof assembly, blocking external water ingress while allowing water vapor to diffuse outward and providing additional protection for the roof assembly.

Vertical Locked Joint Metal Roofing Systems Suitable for steel-frame industrial plants, large-scale industrial parks and sports stadiums, particularly for large-span metal roof projects.

Steel-Plate Composite Roofing and Wall Systems Applied for double-layer profiled steel-plate assemblies with intermediate insulation layers, helping reduce condensation and water-droplet formation on steel structural components.

Customization & Procurement Support

1. Custom weight and width specifications are available.

2. COA and relevant test reports can be supplied for sample evaluation and R&D stage assessment. Official batch-specific COAs are provided together with bulk shipments.

3. Physical product samples can be dispatched for third-party laboratory testing.

4. Professional project technical support and installation guidance are offered.

We welcome inquiries from engineering contractors, project buyers, distributors and building material importers for potential cooperation.

Factory & Building‑Envelope Experience

Xiong'an New Area Xiashi Packing Co., Ltd. is a third‑generation family‑run manufacturer founded back in 1984, bringing decades of hands‑on experience with polymer packaging and building‑envelope materials.

1984: The business got its start, focusing on eco‑friendly, recyclable packaging goods.

2009: Rolled out its first waterproof breathable membranes and vapor‑barrier films, opening up sales across Europe and North America.

2012: Brought condensation‑resistant felt to market, solving real‑world condensation‑drop problems seen on steel structures.

2014: Worked alongside European clients to develop door and window sealing tapes, broadening its lineup of building‑envelope sealing products.

2020: Restarted non‑woven fabric production amid the COVID‑19 pandemic and took part in exterior‑wall waterproofing work for temporary‑hospital builds.

Today: Supplies complete building‑envelope system solutions, including breathable membranes, vapor‑control films, sealing tapes and supporting construction materials.