8410905C_Redacted.pdf

This document is a technical drawing specification for bonding and laminating polyethylene foam used in naval surface warfare applications. The drawing provides detailed guidance on materials, processes, and quality assurance requirements for laminating polyethylene foam material to achieve required size and shape, with notation that cushioning on cylindrical objects is almost always necessary.

The specification establishes mandatory practices for laminating polyethylene foam for use as cushioning material in containers for naval equipment. Key requirements include: lamination planes must be oriented perpendicular to the direction of loading; cushioning sections should be allowed to reach temperature equilibrium before laminating to manage residual stresses; laminating surfaces must be free of dirt, grease, moisture, and foreign matter; and maximum expansion of sections should be permitted before final shaping to allow cut-away of excess material after bonding. Bonding methods include heat fusion (preferred when practicable using hot plates, hot knife blades, and hot air with continuous pressure over the entire area), contact cements (with multiple coats required on both mating surfaces), and hot melt ethylene vinyl acetate cushions (applied via hot melt guns at controlled temperatures). The specification mandates visual examination of bonds to reveal no evidence of cushion separation, includes destructive testing requirements for first article and production lot sample cushions using band saw cuts and tensile testing apparatus, and designates this item as multi-use contract naval surface warfare center material. The document is designated as a drawing specification document number 8410905 for bonding/laminating polyethylene foam applications.