| Description: Hexcel’s HiMax™ DPA (Dot Pattern Adhesive) products are designed to help composite manufacturers maintain the desired position of the reinforcement prior to resin introduction, particularly in closed mold processes such as vacuum infusion and resin transfer molding. HiMax™ DPA was developed to provide the optimal level of tack while keeping additional weight to a minimum. The novel application process allows just 3 grams per m2 of adhesive to be applied to the specified fabric. Using DPA in conjunction with HiMax™ fabrics allows the user to easily position and re-position the individual layers of their laminate stack before resin is introduced. Conformance to tight radii and complex mold geometry is also aided by DPA. Current methods of tackifying fabrics often involve spray adhesives that have been shown in tests to have a detrimental effect on the mechanical properties of the composite. The amount of spray applied can vary greatly across the layup and from user to user. The effect this has on the cured laminate cannot therefore be predicted by engineers. Aside from the effect on the composite there are health concerns caused by the aerosol nature of the spray. HiMax™ DPA is optimized for each of these factors, allowing laminators to work more efficiently and in a safer environment. As bonding effectiveness is depending various factors like lay-up stack, weight, tool surface and geometry, all potential users should test HiMax™ DPA in representative conditions. Product benefits: - Controlled tackifying process
- Easy and time efficient handling
- Consistent weight of adhesive across any given area
- Superior mechanical properties compared to conventional tackifying methods
- Reduced resin flow interference
- Siliconized PET release film with excellent tear resistance and bright color
Information provided by Hexcel Corporation. |
