Mold Release Agents - Description

Miller-Stephenson’s mold release agents are backed by over 40 years of research and development and are relied upon by global industries to ensure efficient, cost-effective, and high-quality release of their molded parts. By pioneering release agent solutions for many of the largest manufacturing organizations, Miller-Stephenson understands what it takes to release the most complex materials in the most demanding molding applications. We have developed specialized release agent formulations for manufacturing operations such as composite/FRP moldingelastomer and rubber moldingpolyurethane and extrusion PUmandrel lay-ups, vacuum bag molding, rotational, compression, and injection molding, etc. Our mold release agents are optimized to maximize throughput and efficiency of the critical parts you mold; from airplane stow bins to O-rings, carbon-fiber bike frames to tires, Miller-Stephenson has a solution for your molding operation. Moreover, all of our formulations are 100% non-flammable, minimal odor, and low to no VOC and are available as eco-friendly water-based formulations. Utilizing the most technological advanced mold release systems, Miller-Stephenson will help molders maximize releases per application and minimize defects and scrap rates,  For more information about which mold release agent is right for you to go to our guide or for guidance on proper mold preparation and release agent application.

Mold release agents provide the critical barrier between a molding surface and the substrate, facilitating separation of the cured part from the mold. Without such a barrier in place, the substrate would become fused to the mold surface, resulting in difficult clean-up and dramatic loss in production efficiency. Even when a mold release agent is used, factors such as irregular applications or improper release agent choice will have a dramatic effect on the quality and consistency of your finished product. It is therefore critical that engineers understand what types of mold release agent are available and which variant would compliment their production method.  There are several distinct release agents categories: Sacrificial, PVA (polyvinyl alcohol), PTFE (polytetrafluoroethylene), and Reactive polysiloxanes.

Critical criteria for each release agent to meet is the following:

  • Surface adhesion and durability
  • Ability to form a thin-film
  • Sufficient surface slip
  • Chemical inertness to the molding process
  • Number of releases per application
  • Minimal or No Transfer

Release agents types and individual products within those types, vary significantly in regard to slip, application methods, production efficiency, and cost. For that reason, manufacturers who invest time researching and testing release agents will see a return on that investment once an optimized agent is found.  Sacrificial (typically waxes and silicone oils) and PVA release agents are the lowest cost materials, offering adequate slip and chemical inertness.  Unfortunately, these agents must be re-applied after each molding cycle and will transfer to the molding part.  This results in time-consuming cleaning of the molded part.  Interestingly, while the initial cost may be lower for the sacrificial and PVA release agents, the overall cost is substantially more as one can expect more releases per application and little to no post-operation cleaning with PTFE and reactive polysiloxane resins, like ReleaSys™.

Miller-Stephenson specializes in providing only the highest performing and cost-effective mold release agent solutions for it customers, our companies specializes in providing PTFE and reactive polysiloxane based release agents. Our company is 100% back-integrated meaning our manufacturing, inventory, and quality is maintained regardless of fluctuations in the market.  In an effort to help guide process engineers in selecting which agent would work best for their molding application we have summarized the leading attributes for each of our agents.

Semi-Permanent Release Agents

The ReleaSys™ product line is Miller-Stephenson’s most advanced, semi-permanent release systems which maximizes releases per application while minimizing transfer and fouling.

PTFE Release Agents

Miller-Stephenson’s MS-122 / MS-143 series offers high-performance mold release solutions utilizing low molecular weight PTFE (polytetrafluoroethylene) and proprietary surface activation.

High-Temperature Release Agents

Miller-Stephenson offers to release solutions for molding operations which operate at temperatures exceeding 1562°F / 842°C.