MIL-PRF-85036B(AS)
3.3 Construction. Barrier materials shall be constructed of one or more plies in any manner
that meets the requirements of this specification. Butting of component materials or the finished
product shall not be permitted except in the direction perpendicular to the rolling direction.
3.3.1 Splices. A roll shall not contain more than 3 splices (4 pieces) and each piece shall be
not less than 45 yards in length. Splices within rolls shall be even the entire width of the roll
material and shall not come apart during unwinding of the roll. Splices within rolls shall be
flagged at both ends of each splice with colored markers. Barrier material in flat cut sheets shall
not contain splices (see 4.3.2.1).
3.4 Form. The barrier material shall be furnished in rolls or flat cut sheets as specified in the
contract or delivery order (see 6.2).
3.4.1 Rolls. Unless otherwise specified (see 6.2), the width of roll material shall be
36 inches, with a tolerance of plus 1/4 inch or minus 1/8 inch. The average length of roll material
shall be not less than 200 yards. The length of any individual roll shall be not less than 195 yards.
The roll material shall be uniformly wound on nonreturnable cores. The core's inside diameter
shall be not less than 3 inches, with a tolerance of plus 1/8 inch. The length of the core shall be
equal to the width of the roll material, with a tolerance of plus 1/8 inch. The core shall be rigid to
prevent distortion of the roll during use and shipment conditions. Each roll shall be restrained to
prevent unwinding (see 4.3.2.1).
3.4.2 Sheets. When flat cut sheets are specified, the length and width shall be as specified by
the acquiring activity (see 6.2). If the length and width tolerances are not specified, the tolerance
for each shall be plus 1/4 inch or minus 1/8 inch. Flat cut sheets shall be evenly stacked
(see 4.3.2.1).
3.5 Sealing. The material shall exhibit no delamination of the heat-sealed area when sealed
according to the manufacturer's recommended conditions (see 4.5). Each roll or package
(flat cuts) of barrier material shall include a tag secured to the core of rolls, or sheet inserted in
the package of sheets with the sealing instructions for heat-sealing on rotary, band, and jaw-type
sealing equipment. The tag or sheet shall be visible upon opening the unit package (see 4.3.2.1).
3.6 Identification of material. The specification number, manufacturer's name,
manufacturer's designation, month and year of manufacture, and lot number shall be clearly and
legibly marked using water-resistant ink on the backing surface of the material. The color of the
markings shall conform to the lusterless black of FED-STD-595, Color No. 37038. The complete
markings shall be continuous lengthwise and the distance between groups of markings shall be not
greater than 2 inches. A complete group of markings shall appear once in each 2 1/2 inches of
width of the roll. The letters and figures shall be not less than 1/8 inch high (see 4.3.2.1).
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