Summary
The buoys shall be fabricated in accordance with the drawings and shall meet the requirements of this specification. The buoys shall be manufactured from ionomer foam and shall have polyvinyl chloride (PVC) hardware. Ionomer foam. Ionomer foam used in the buoys shall be made of ionomer resin 9720 or 9721 or ionomer resin 7020 or 7030. The ionomer foam shall consist of an expanded structure of individual non-connecting cells. The cells shall be closed, with the exception of those on the periphery of each foam piece that may be cut or broken during fabrication. The contractor may use repelletized virgin ionomer foam (not to exceed 25%) in the fabrication of ionomer foam. The resultant ionomer foam shall be subjected to the entire battery of First Article tests at the
contractor’s expense. Repelletized virgin ionomer foam material may be used in the buoys if the resultant ionomer foam passes all performance requirements as described in Table II. Method of Fabrication. The foam shall be extruded into colored sheets
having a density of at least 4.4 pounds per cubic foot (pcf), not greater than 4.6 pcf and be between 1/8” and 3/8” thick. The extruded sheets shall be spirally wrapped into the cylindrical shapes as shown on the drawings. Each layer shall be continuously heat sealed onto the previous layer over the entire length and circumference of the shape. The completed foam sections of the
buoys shall be free from cracks, holes, gouges, and embedded foreign material. See attached file.