Rheological tests revealed that by separating the anhydrite curing agent from a formulated RTM resin system, the remaining epoxy liquid had its flowtime extended. Rosin-sourced, anhydrite-cured epoxies that would normally be regarded as unsuited to liquid composite molding, were thus processed. The separation of resin and hardener helped to process inherently high viscosity resins in a convenient way. These findings were verified for both carbon and ramie fiber composites.Ībstract = "In this concept-proof study, a preform-based RTM (Resin Transfer Molding) process is presented that is characterized by first pre-loading the solid curing agent onto the preform, and then injecting the liquid nonreactive resin with an intrinsically low viscosity into the mold to infiltrate and wet the pre-loaded preform. Composite laminates made via this approach exhibited roughly comparable quality and mechanical properties with prepreg controls via autoclave or compression molding, respectively. C-scan and glass transition temperature tests showed that the preform pre-loaded with anhydrite was fully infiltrated and wetted by the liquid epoxy, and the two components were diffused and dissolved with each other, and finally, well reacted and cured. Learn More.Ĭontact us today to discuss your application, receive engineering samples, or have MSI conduct a free evaluation of your component for sealing, spacing, or bonding with our products.In this concept-proof study, a preform-based RTM (Resin Transfer Molding) process is presented that is characterized by first pre-loading the solid curing agent onto the preform, and then injecting the liquid nonreactive resin with an intrinsically low viscosity into the mold to infiltrate and wet the pre-loaded preform. After soldering, Wash-Aways dissolve in water or alcohol baths that remove flux, leaving uniform spacing between components and circuit boards. Wash-Aways dissolving spacers position PCB components during soldering. Poly-forms are available as a flowing system for applications that require seal coverage and permeation or as a no-flow system with restricted flow for precision adhesive bond lines. Their flexible form allows them to be preshaped in small to large and simple to complex seal configurations. Poly-forms also provide rapid loading and consistent results. Poly-forms flexible adhesive films and adhesive preforms are another no-mix, no-mess alternative to liquid adhesives. Several epoxy systems are available to meet the requirements of a wide range of applications. Manual loading or automated systems rapidly dispense Uni-form with minimal operator training for faster production rates. In addition, the solid epoxy seals eliminate the drips, variations, and mess of liquid epoxies. Close tolerances and consistent viscosity ensure repeatable results. Multi-Seals designs or selects custom configurations to match specific component designs. When heated, Uni-forms melt and set for consistent epoxy seals. Uni-forms precision epoxy preforms are pre-shaped resins that are solid at room temperature. We manufacture Uni-forms precision epoxy preforms, Poly-forms flexible adhesive films, and Wash-Aways dissolvable spacers.
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