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A technology for strong moldable thermoplastic materials

News International-French

25 Dec 2015

The KyronMAX series from Piper Plastics is a combination of a proprietary high pressure molding technology, coupled with a state-of-the-art material technology to produce high strength structural components.

Strongest moldable thermoplastic materials available
Composite plastic materials are generally broken down into two categories: composite plastics that can be injection molded and composite polymers that are produced with pre-preg lay-ups. Although injection molded composite plastics are inherently less expensive than their lay-up counterparts, because they can be high volume molded, they traditionally have considerably lower mechanical properties. Lay-up composite polymers are much stronger but require very expensive and laborious processing which limits their applications. The KyronMAX materials bridge the gap between the two technologies and allow parts to be high volume injection molded with strengths that approach lay-up composite polymers.

Metal replacement
Generally speaking even the strongest moldable plastics are nowhere near the strength of metals so the metal part geometry must be altered and re-engineered to utilize plastic materials. This often involves adding much more material volume of the plastic which can increase the weight and cost of the part. KyronMAX polymers offer mechanical properties which meet, and in some cases, exceed metals. The resulting component design can more easily replicate the original metal design, reducing material volume, while realizing all the benefits of the plastic material.

Example of application: molded screws
For years aerospace OEM's have requested Piper Plastics develop an injection moldable thermoplastic composite bolt that exhibits metal-like strength. These end users have been looking at plastic fasteners to replace traditional titanium metal fasteners for weight savings but were unable to find a polymer with enough mechanical performance or that was economically viable.

Piper Plastics molded one of the KyronMAX thermoplastic polymers into a standard #10-32 bolt and was able to meet both the strength and the cost target requirements for the application while reducing the weight of the incumbent titanium bolt by approximately 60%.

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