The Azote brand products are manufactured and sold as essentially rectangular sheets (sometimes known as buns or blocks) in a range of sizes, all having process skin surfaces. Talc residues or other processing aids may be present on the skin surfaces.
A skin/skin sheet showing any surface fault or defect is considered to be in specification providing that a specification cell/cell sheet of nominal/minimum dimensions and thickness 3 mm less than the nominal/minimum sheet thickness can be obtained (e.g. a 2000 mm x 1000 mm x 27 mm specification cell/cell sheet shall be obtainable from nominal 2000 mm x 1000 mm x 30 mm skin/skin sheet).
Certain grades are produced with crosslink levels significantly different from standard, in order to provide special properties (such as enhanced thermoformability or enhanced resilience). Such grades may deviate more substantially from data sheet indications - all necessary specification requirements for these products should be made and agreed in writing with Zotefoams pic Quality Assurance Department.
The above are arranged into void categories and these categories are quoted for the different grades in Tables 1 and 2 (TIS01). The category description and the void levels these represent are given in Table 3 (TIS01).