Planetary Centrifugal Mixer Applications
Planetary Centrifugal Mixers Excel at Blending and Deaerating Resins
Characterized by their high level of viscosity, resins are integral to a wide variety of industries. Their usage ranges from medical purposes to electronic and solar applications—and many more. Regardless of the application, all industries share the same prerequisite for their resins: they have to be perfectly blended, and the consistency of the mixture has to be replicated with the exact same high quality over and over again.
For example, in the field of dentistry, composite resins are the most common dental restorative materials. However, polymerization shrinkage is one of the main reasons why clinical dental fillings can fail. In 2014, a study at the National Taiwan University tried to conjugate two diisocyanate side chains to dimethacrylate resins with the goal of reducing polymerization shrinkage by increasing the hardness of composite resins. Researchers used a Mazuru planetary centrifugal mixer to blend the low-shrinkage composite resins they developed for dental application. A planetary centrifugal mixer, also known as a paste mixer, can mix highly viscous materials like resin (up to approximately 1,000,000 cP). The researchers discovered that the urethane modification of dimethacrylate was an effective means of reducing polymerization shrinkage and increasing surface hardness. Using a planetary centrifugal mixer to blend the materials resulted in a consistency in the resin; the results can be replicated over and over with perfect precision.
In the field of electronics manufacturing, many companies use different compositions of resins in ways that are essential to the performance and durability of the end-product. For instance, epoxy resin is frequently used as a semiconductor sealing material, or a laminating material for an electronic substrate. One study published in the 2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM) investigated the difference between the processing techniques of using sonification versus a planetary centrifugal mixer when it comes to the dielectric strength of epoxy/SiO 2 nanocomposite. While sonification is a popular process, it produces small air bubbles that may have effects on the dielectric properties. Planetary centrifugal mixers specialize in mixing viscous material and powders while degassing at the same time. This process has proven to enhance storage stability, increase latency and thermal conductivity, and other beneficial characteristics.
With full automation, planetary centrifugal mixers are efficient machines that deliver consistent results. This is an essential characteristic that helps to ensure perfect uniformity and reliability in blending. Torrey Hills Technologies offers two lines of planetary centrifugal mixers with contactless operation (no propeller required): their own innovative SI-PM series, as well as paste mixers by Mazerustar. Both vacuum and non-vacuum models are available. While a non-vacuum model is still very competent at removing air bubbles, a vacuum model is best if air bubbles need to be removed at a submicron-level from resins.