Лако-красочные материалы — производство

There is a technical and economic limit to the size and complexity of shape of a single aluminium extrusion. This limits their structural possibilities unless groups of extrusions can be joined together to produce large or intricate multi-chamber hollow combinations. By joining such groups together using adhesive bonding, as opposed to welding, there is greater choice of alloy type. This concept of combining individual extrusions has been advanced by British Alcan for transport and construction possibilities. The deep I-beam development aimed at the offshore industry measures some 12 m long by 1 m deep, and comprises fifteen individual extrusions bonded with a single part heat-cured toughened epoxide (Fig. 8.9). Elements such as these may have significant potential for exploitation in, say, wide-span column-free building structures. In the Alcan developments the tapered mating surfaces of the joints were gritblasted and primed with a silane coupling agent prior to bonding.