A-A-1898D
5.2.4 Expansion test. For each sample unit, expansion shall be determined by cutting out and placing a 10.2 ±0.64 x 35.6 ±0.64 cm (4 ±114 inch x 14 ±114 inch) specimen of compressed cushioning material on a level surface. Place reference marks along the length of the specimen
25.4 ±0.64 cm (10 ±114 inch) apart. Clamp a 10.2 cm (4 inches) wide end. Apply a gradual force and extend the material until the maximum amount of extension, without ply rupture, is reached. Measure the expanded length between the marks and calculate the expansion as follows:
Expansion = Expanded length
Compressed length
5.2.5 Absorbency capacity test. Weigh out 0.1 gram (nearest 0.01g) a 104.8 ±3.18 cm (4118 ±118 inch) square piece of material having a thickness of not less than 12.7 mm (112 inch). This is the dry weight. Material with thickness less than 12.7 mm (112 inch) shall be stacked to at least 12.7 mm (112 inch) and stapled with pre-weighed staples at the four corners. Place the material on the surface of water which is maintained at 21.1° C to 23.8° C (70° F to 75° F). The water bath shall be sufficiently large to permit the material to submerge. After 30 seconds, remove the material
with a piece of 12.7 mm (112 inch) mesh screen which is 15.2 cm (6 inches) square. Drain in a horizontal position for 1 minute and weigh as specified herein. This is the wet weight. Calculate the absorbing capacity follows:
Absorbing = Wet weight - Dry weight + (Staple wt. if applicable) Capacity Dry Weight + (Staple wt. if applicable)
5.2.6 Tensile strength test. Two individual 10.2 ±0.32 cm (4 ±118 inch) square specimens shall be prepared from each sample unit. Place one specimen between two clamps that are 5.1 cm (2 inches) apart. The clamps shall have flat faces, of at least 5.1 x 10.2 cm (2 x 4 inches) and shall exert uniform pressure. The tensile strength shall be determined by attaching one clamp to a stationary support and adding weights to the other clamp until the material breaks or tears. Perform an additional determination of tensile strength at right angles to first one.
5.2.7 Flame spread index test. The cushioning material shall be tested as specified in
ASTM E162, at least every 12 months, or whenever the manufacturing process changes if less than 12 months.
5.2.8 Specific Optical Density Test. The cushioning material shall be tested as specified in ASTM E662, at least every 12 months, or whenever the manufacturing process changes if less than 12 months.
6. PACKAGING. Preservation, packing, and marking shall be as specified in the contract or purchase order.
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