A-A-1899
November 24, 1986
COMMERCIQAL ITEM DESCRIPTION
CUSHIONING MATERIAL, PACKAGING (CELLULOSIC, WATER RESISTANT)
The General Services Administration has authorized the use of this commercial item description in preference to Type II, Classes A (compressed) and B (uncompressed) of PPP-C-843D.
This description covers (Class A) low tensile strength filler material and (Class B) high tensile strength wrapping material used for cushioning fragile containers and for protecting containers from liquids broken in transit.
Salient characteristics.
The cushioning material shall be composed of cellulosic material that will provide a product complying with the requirements of this commercial item description.
The cushioning material shall be plain, uncompressed or longitudinally compressed, roll or multifold units, and perforated style. For plain (uncompressed) material, perforations are a linear series of holes in the material to permit tearing off of a premeasured length of material.
Absorbent capacity.
The cushioning material shall absorb not more than 3 times its weight of water when tested as follows:
Weigh to 0.1 grams (i.e., to nearest 0.01 and round off to tenths) a 4 + 1/8 inch square piece of material having a thickness of not less than ˝ inch. This is the dry weight (thinner material shall be stacked to at least 1/2 inch thick and stapled with preweighed staples at the four corners). Place the material on the surface of water which is maintained at 21-24 degrees C. (70-75 degrees F). The water bath shall be sufficiently large to permit the material to submerge. After 30 seconds, remove the material with a piece of ˝ inch mesh screen which is 6 inches square. Drain in a horizontal position for 1 minute and weigh the wet sample as describe above. This is the wet weight. Calculate the absorbing capacity as follows:
Absorbent capacity = wet. wt. – dry wt. – (staple wt. if applicable)
(no. of times its dry wt.) dry wt. (if applicable)
Compression set.
The material shall have a compression set of not more than 40 percent when tested as follows:
Place a stack of 4-inch square (+ 1/8 inch) samples of material having a minimum of 1-inch measured thickness between parallel, rigid, flat plates. Compress to 50 percent of the measured thickness for 2 hours. Three minutes after the pressure has been removed, measure the final thickness. Calculate as follows:
Compression set =
(original thickness – final thickness) X 100
(in percent) (original thickness)
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