Thermoplastic adhesive films for composite preforms
Pontacol thermoplastic adhesive films are ideally suited for the production of preforms and at the same time also improve the mechanical properties of the finished composite parts. The specially developed adhesive films based on copolyester and copolyamide support the production of fiber-reinforced, duromer composite components, with the individual fiber/laminate layers being laminated with the slit adhesive film. This creates a fixation of the dry fiber fabrics or scrims, which ensures the specified fiber orientation for further manufacturing. The fiber orientation is thus already guaranteed during the preforming and the contour of the layer cuts is retained. With minimal use of materials, an easy-to-use adhesive film eliminates the need for sewing threads or binders in liquid or powder form. The coated fiber cuts can then be reliably stacked into two-dimensional preforms and, due to their thermoplastic properties, connected to one another by temperature or formed into three-dimensional components.
Picture: Lamination of the adhesive film to the fiber structure
The preform produced in this way is suitable for all common resin infusion processes. The resin (e.g. epoxy resin 1500mPas) is introduced by vacuum or pressure (RTM).
The tailor-made properties of the adhesive films, which are tailored to the matrix properties, enable an optimal bond between duromer and thermoplastic. In addition to the advantages of simple and efficient production of preforms, the mechanical properties of the fiber-reinforced composites are also enhanced. In particular, the service life and susceptibility to damage are massively improved through increased impact strength and the components withstand higher mechanical loads.
Picture: Carbon fiber fabric with laminated Pontacol adhesive film