Toll-Free: 800.456.5263 CAREERS CONTACT RESOURCES APPLICATIONS PROCESSES MATERIALS SERVICES ABOUT MFG LOCATIONS HOME › PROCESSES › VACUUM INFUSION PROCESSES Vacuum Infusion Processes Vacuum Infusion Processing (VIP), RTM Light (LRTM, Resin Infusion, VARTM, SCRIMP) Vacuum Infusion Processing (VIP) VIP and RTM Light are vacuum-assisted, closed-mold resin processes. For compression on the B-side surface, VIP uses a flexible sheet or re-usable bag, and RTM Light employs a lightweight counter tool. This process yields increased laminate compression, a higher glass-to-resin ratio, and excellent strength-to-weight characteristics. With these processes dry reinforcements are placed in the mold, frequently combined with cores or other inserts. Vacuum is then applied to compact the reinforcement and eliminate air. Resin is introduced and the vacuum draws it through the reinforcement. Very large parts can be made by VIP using very low viscosity resin and an appropriate fill time with bleeder film and other venting. This resin infusion process results in very low void content and excellent mechanical properties due to the relatively high glass content. Fiber content is determined by fiber architecture and pressure. With RTM Light, resin is introduced via a pumping mechanism under 2psi. More flexibility in types of resins and fillers is possible, and an intermediate range of fiber contents. Benefits are better cosmetic finishes and variation in part thickness, and faster cycle times for lower cost. Tools can be aluminum, steel or composite. Light RTM Recommended for products with high strength-to-weight requirements, or with slight design returns, edge overhangs, or high draft angles that would cause die-locks on rigid B-side mold surfaces. Best suited for mid-volume production in the range of 200 to 5,000 parts per year* Environmentally-friendly – this closed mold process involves no resin exposure Pre-placed reinforcement can be employed to achieve optimum strength-weight ratios In-mold gel coat finishes can be employed for desired cosmetic finishes * Volume recommendations are averages and provided only as a general guideline. Actual volume efficiencies are a more complex matter requiring detailed statistics about the part to be manufactured. Resources Mass Reduction with Value-Engineered Composites Guidance for light-weighting (mass reduction) of products using advanced composite materials. Technical Design Guide for FRP Composite Products and Parts Fiber glass (FRP) composite materials and processes are explained in detail. This design guide outlines various selection criteria with helpful technical data and comparisons to alternative materials. Guide for Selecting Best FRP Composite Process Guidelines for Selecting the Best FRP Composite Process for Your Project Processes Compression Molding / SMC LCM / MFG PRIME™ Open Molding Resin Transfer Molding (RTM) Vacuum Infusion Processes Related Applications Renewable Energy Related Materials Epoxy Resins Hybrid Resins Phenolics Polyester Resins Vinyl Ester Resins Stay Up To Date! Sign Up For Our Newsletter SUBSCRIBE MOLDED FIBER GLASS COMPANIES 2925 MFG Place, P.O. Box 675 Ashtabula, OH 44005-0675 Toll-Free: 800.456.5263 Phone: 440.997.5851 Fax: 440.994.5162 QUICK LINKS APPLICATIONS PROCESSES MATERIALS SERVICES ABOUT MFG LOCATIONS CAREERS CONTACT RESOURCES LEGAL TEAMMATE WELLNESS FOLLOW US © 2021 Molded Fiber Glass Companies | Site by BUCHANAN