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Why Use Thermoplastic Injection Molding?

Thermoplastic is a term that has gained a lot of traction in the manufacturing world as it lends itself to numerous different applications and industries. Here at Sil-Pro we certainly know a thing or two about the advantages of such materials as well as the molding and forming of thermoplastic components. Materials classified as thermoplastics include acrylic, nylon, polyethylene, polypropylene, polystyrene, polyvinyl chloride, and polytetrafluoroethylene (PTFE.) In the medical field, thermoplastic can often be found in implantable and disposable medical devices.

What makes thermoplastics a good choice for a medical device material? They typically display a variety of characteristics that make them desirable for devices, including biocompatibility, biostability, abrasion resistance, and low temperature elasticity. Thermoplastics also hold up better in bonding and over-molding applications where silicone exhibits poor adhesion.

As we’ve discussed before in previous blogs, implantable medical devices are shrinking in size. So what is the best and most effective way to mold heated plastic into a tiny, precise shape? Thermoplastic Injection Molding is one of the best ways to achieve the high standards of the medical industry. Electric hydraulic hybrid injection molding machines are accurate and efficient, with injection speeds up to 1500 mm/sec and acceleration of 2 milliseconds. They are capable of extreme injection pressures that minimize part variability, a must for the high stakes of the medical industry. These machines also make it possible to combine the control of electric equipment while maintaining the injection speed of a hydraulic machine.