Moisture Barrier Inner Liner

Outer Layer: Moisture Barrier Inner Liner typically uses high-strength LLDPE (linear low-density polyethylene) for puncture and tensile resistance, ensuring it can handle sharp-edged minerals or granular materials without damage.

 

Middle Layer: This is the core secret, a barrier layer made of EVOH (ethylene-vinyl alcohol copolymer) or PA (nylon).

 

Inner Layer: Food-grade LDPE, ensuring no chemical reaction occurs during direct contact with goods, maintaining cleanliness and hygiene.

Thickness: Typically between 80-180 microns.

Water Vapor Transmission Rate (WVTR): Water vapor transmission rate can be < 1.0 g/m²/24h.

Hazardous Goods Packaging: Moisture Barrier Inner Liner conforms to UN standards for moisture-proof inner liner use in the export of lithium battery materials and active chemicals.

 

Food-Grade Packaging: For example, milk powder, starch, and food additives, which are extremely sensitive to moisture.

 

High-value mineral/plastic particles: Prevent color difference or performance degradation due to moisture.

ISO 9001:2015: This is fundamental, demonstrating that our production processes are controlled.

QS Food Grade Certification: This certification is crucial if your goods are food or pharmaceutical products.

SGS/Intertek Test Reports: We regularly send our products for testing; reports on moisture permeability, drop tests, and sealing tests are readily available.

Production Capacity & Quality Control: We have three fully automated multi-layer co-extrusion blown film production lines with a monthly capacity of approximately 300 tons.

Quality control isn't done by human supervision, but by machines: Our Moisture Barrier Inner Liner production line has an online thickness gauge; the machine automatically alarms if there is a thickness deviation. Before each batch is shipped, we conduct a 24-hour moisture permeability test. We don't do random checks; we do full inspection-ensuring that every bag is securely sealed and free of pinholes before leaving the factory.

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