Infusion is one of the most innovative rolling processes in the nautical world in the construction of boats. Its main feature is the replacement of the manual lamination process by vacuum infusion. This process offers vessels a reduction of up to 30% in weight, greater structural resistance, among many other advantages.
In practice, the process takes place as follows: all material such as PVC fibers, fabrics and foams (Divinycell and Renicell) are pre-cut and precisely adjusted in place, they are placed dry in the ready-made mold and thus wrapped in a bag vacuum plastic. When the vacuum pump is activated, the air leaves the plastic bag and the resin is transferred into the layers of fibers, fabrics and foam, thanks to the pressure difference caused by the vacuum pump. As there is no manual contact with the resin during lamination, excess waste in its use is avoided, creating a laminate that is much more uniform and free of air bubbles, making the piece much more resistant. In the manual process, many fibers can be lost by falling on the floor or being partially impregnated, without being able to be reused. In order to have an idea of the utilization rate, the impregnation of the resin between the fibers reaches 60% in the vacuum infusion method, guaranteeing a homogeneity in the thickness of the laminate, while by manual lamination it reaches only 20 or 30%.
The construction of vessels through vacuum infusion uses the sandwich system, thus gaining greater thermal insulation. Vessels produced by infusion are usually considered “Wood free”, that is, no wood is used in their manufacture, some rare shipyards adopt this method of not using structural wood even in manual laminating processes, in place of foam. Divinycell and Renicell. The process not only guarantees less weight, but also increases structural strength. Depending on the location of the vessel, this resistance can be five times greater. And the main thing, it is an ecologically correct process.
Vacuum pump, containment reservoir, vacuometer and raw materials such as polyester resin, glass biaxial compounds are examples of the resources used in the process.
The vessels that have the vacuum infusion process in their manufacture, stand out for their high performance, notable improvement in navigability, speed, in addition to having less need for motorization and consequently less fuel consumption. There are numerous advantages in adopting this lamination process for a vessel.