Reaction injection molding (RIM)

Addressing Production Challenges of Reaction Injection Molding

Reaction Injection Molding (RIM) is the process of injecting material by using a high-pressure impingement-mixed stream into a mold or cavity. Other acronyms related to RIM are RRIM and SRIM. RRIM- Reinforced Reaction Injection Molding has reinforcement particles suspended in the chemical stream. SRIM- Structural Reaction Injection Molding uses continuous fiber structures that are pre-located in the injection mold. Chem-Trend has experience developing products that address the challenges encountered when molding with all forms of Reaction Injection Molding.

Release agents for use within the RIM process need to be able to resist movement and disruption during injection and still be mobile enough to produce a slippery surface once the polyurethane has been cured. Additionally, the material composition of the polyurethanes can interact differently with the mold release agents creating additional challenges. Other considerations come into play with respect to the amount of material that is left behind by the mold release agent. A low amount of residual material left in the mold is highly desirable to reduce the cleaning frequency of the mold. Mold release application is very critical to meet the needs of the customer’s application. Often the application window determines the balance between good release properties and excessive material building up in the mold.

50 Years of Experience Focused on Providing Solutions.

Reaction injection molding (RIM) presents a set of unique challenges for the mold release agent and ours have provided a competitive advantage to the largest and smallest manufacturers alike. We have developed both water- and solvent-based release agent solutions that can maximize productivity while meeting the most demanding specifications and operating conditions. Chem-Trend release agents provide:

  • Excellent part release
  • Optimal surface finish quality
  • Compatibility with secondary operations
  • Lower scrap rates
  • Cleaner molds
  • Less downtime
  • Water-based, no/low VOC emissions, cleaner safer working environments
  • Tin-free formulations where required

We also offer a broad portfolio of release related processing aids, including: mold cleaners, sealers, preparation pastes, head flush solutions and anti-squeak products.

With over 50 years of experience in developing and manufacturing mold release agents and related products for the polyurethane industry, Chem-Trend knows how to develop the right release products for your RIM application. At Chem-Trend we can custom formulate mold release agents, mold cleaners, mold preparation pastes, anti-squeak products and flushing solvents to add productivity, quality and overall value to your bottom line. Our products work together as a total solution to improve your performance. To find out more about our full line of products for all types of RIM, and other polyurethane applications, read our main Polyurethane Molding or contact us directly to speak with one of our experts.

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