- Category: Tech Tips
Just as pilots perform a pre-flight check to verify that all systems are working properly, it is often helpful for molders of plastic parts to review material handling methods. While many of the steps involved in mixing, pouring and curing polyurethanes are regarded as standard procedure to experienced technicians - improper methodologies are a most frequent cause of calls to our technical hotline!
Inaccurate resin to hardener ratios often result in parts with soft, uncured areas. It is important to verify correct component mix ratios on product containers before measuring out and weighing resin, hardener and any fillers or pigments being used. The scale used for weighing must also be accurate - periodic calibration is essential!
When mixing, resin, hardener and fillers should be stirred together for one to three minutes, checking the time on a clock. Container bottom and sidewalls should be scraped frequently to ensure that all components are fully incorporated.
Shop temperature should be monitored. The gel times and cure cycles of most materials is determined at temperatures between 75-77ºF. Colder or warmer shop temperatures will affect handling of the polymer.
To attain the physical performance properties outlined on product data sheets, stated cure cycles must be followed. For many Innovative Polymers polyurethanes, a room temperature cure schedule is provided as well as a post-cure + room temperature cure option. If the decision is made to use a heat cure, remember to:
• Heat the oven to the specified temperature
• Preheat the mold
• Remove the mold from the oven
• Pour the part at room temperature
• Wait until the part cures enough for demolding at room temperature
• Place the demolded part back in the oven to complete the elevated temperature part of the cure cycle
The physical properties, processing details and cured performance information on Innovative Polymers technical data sheets is critical to realizing anticipated part quality and performance. Be sure to consult the data sheet before beginning every casting project!
RAMPF acquires US company Innovative Polymers, Inc.
Grafenberg, July 1, 2016. RAMPF has acquired the US COMPANY INNOVATIVE POLYMERS, INC., a provider of technologically advanced polyurethanes for tooling and modelling applications. With this acquisition, RAMPF is set to further expand its range of products in the NAFTA markets.
Innovative Polymers, Inc. will be integrated into RAMPF’s North American subsidiary RAMPF GROUP, INC., which offers RAKU-PUR® modeling and styling boards, Close Contour castings, blocks and pastes, as well as liquid systems on the NAFTA markets since 2003. » Continue reading
Innovative Offers Two New Tools to Improve Your Project’s Success
Innovative has developed two new ways to access instant help when using our materials to create your polyurethane projects. One is a Processing Guide which includes many tips that will help you avoid making common mistakes and the other is an introductory step-by-step casting video. We believe you will find a great benefit in viewing both resources before attempting your next project.
Innovative Polymers Upgrades Family of High-performance Polyurethanes
The InnoTuf® HP-2100 family of ultra-durable, room-temperature processable polyurethanes has been expanded to better serve customer and industry requirements. As with all Innovative Polymers' products, InnoTuf® formulations are mercury-free and contain neither MOCA nor free-TDI. » Read more
Rock Candy Chooses Polyurethane For Climbing Holds
With more than 7.8 million participants* in the U.S., recreational climbing on artificial indoor walls, in recent years, has surpassed outdoor climbing and become a recognized sport with nationwide and international competitions, publications and even a “lingo” unique to wall climbing enthusiasts. To support enthusiasts’ ever-growing demand for varied climbing experiences, manufacturers are producing walls with larger and more challenging surfaces, routes and holds.. » Read more
Innovative Polymers specializes in providing technologically advanced polyurethanes for the toughest applications. Our technical support team welcomes the opportunity to partner with our customers in solving processing and performance challenges. If an existing product doesn’t meet project requirements our... » Read More