MIL-PRF-131 Class 1 Tyvek® Barrier Material

MIL-PRF-131 Class 1 Tyvek® Barrier Material (Marvelseal® 585) delivers watervaporproof, greaseproof, and heat-sealable protection for high-performance military, aerospace, and industrial packaging applications. Engineered with a Tyvek® / Polyethylene / Aluminum Foil / Polyethylene / Film construction, this laminate combines durability, flexibility, and barrier performance in one versatile material. Marvelseal® 585 is QPL-compliant to MIL-PRF-131K, Class 1 and conforms to FDA Regulation 21 CFR 177.1520, allowing direct contact with food and pharmaceuticals. The Tyvek® outer layer offers outstanding puncture and tear resistance, making it ideal for packaging sharp or irregularly shaped components while maintaining full vapor and moisture protection. Typical Properties: Specification: Meets MIL-PRF-131K, Class 1 Structure: Tyvek® / PE / Foil / PE / Film Caliper: 8.5 mil (ASTM D2103) Basis Weight: 88.3 lbs/3000 ft² (ASTM D4321/T410) Yield: 4,892 in²/lb (ASTM D4321/T410) Water Vapor