MIL-PRF-131L Class 1 Bags, Pouches & Packaging

CALPAC ULTRAFOIL 1000M

CALPAC ULTRAFOIL 1000M is a heavy-duty, foil-based barrier package designed for the most rigorous military and naval logistics environments. This material meets the MIL-PRF-131L Class 1 specification, which supersedes the former MIL-PRF-131K, MIL-B-131H, and MIL-PRF-131J standards. With the release of Revision L, the Department of Defense has streamlined specifications, removing Class 2 materials and establishing Class 1 laminates as the primary standard for general-use barrier protection.

CALPAC ULTRAFOIL 1000M functions as a robust environmental shield. It is opaque, waterproof, greaseproof, and water-vapor-proof, ensuring that critical assets remain operational after transport. Specifically formulated for high puncture resistance, this material is ideal for packaging machine parts, aircraft components, and sensitive electronics that may experience rough handling or corrosive environments.

Caltex Plastics serves as a direct manufacturer of CALPAC ULTRAFOIL 1000M for contractors and manufacturers seeking reliable MIL-SPEC packaging solutions. We ensure full compliance with the latest DoD requirements.

Features

The CALPAC ULTRAFOIL 1000M series offers superior physical strength compared to lighter-grade laminates. It provides a seal that prevents the ingress of moisture and contaminants. Key features include:

• Heavy-duty resistance: Engineered with exceptional resistance to chemicals, tears, and punctures, making it suitable for crating and export shipping.
• Contamination control: Minimizes risk from non-volatile residues and outgassing, protecting sensitive optics and electronics.
• Construction: Features a robust foil-based moisture barrier laminate with a linear low-density polyethylene (LLDPE) inner sealant layer for consistent seal integrity.
• Barrier performance: Extremely low moisture vapor transmission rate (MVTR) protects against humidity, oxygen, odors, and airborne contaminants.
• Vacuum packaging: Lightweight and flexible enough to conform to product shapes, and suitable for vacuum applications, including nitrogen flushing.
• Compliance and safety: Available in Class 100 clean configurations. Compliant with lead-free RoHS 2, REACH, and Conflict Minerals regulations.
• Formats: Available in zipper, side gusset, bottom gusset, and T-Seal bag configurations to suit various component shapes.

Applications

Preservation methods utilizing CALPAC ULTRAFOIL 1000M are essential for assets entering the military supply chain, particularly those destined for naval aviation environments. Equipment stored or transferred at sea is exposed to high salt concentrations and extreme humidity. This material acts as a Faraday cage and moisture barrier, deflecting corrosive elements that standard commercial packaging cannot withstand.

The 1000M series is specifically recommended for items requiring protection against rough handling during moderate to long-term storage. Typical applications include the preservation of engines, transmission components, and avionics. Proper use of this material helps contractors adhere to MIL-STD-2073 shipping requirements for preserving mission-capable hardware.

Partner With Caltex Plastics  

Caltex Plastics operates 24 hours a day, seven days a week, ensuring rapid production and delivery for time-sensitive military contracts. As a direct manufacturer, we offer custom packaging configurations, including bags, tubing, and rollstock, tailored to your exact dimensional needs.

We operate under strict quality management systems, including MIL-SPEC, FDA, and A.I.B. certifications, to help you meet military packaging standards with confidence. Whether you require standard runs or custom converted sizes, our team provides the technical expertise and manufacturing capacity to support your supply chain.

Contact Caltex Plastics today to request an estimate for MIL-PRF-131L Class 1 bags, pouches, and packaging (CALPAC ULTRAFOIL 1000M).