The housing for this external computer storage disk was molded from an RTP Company conductive compound formulated with carbon nanotubes to meet strict ESD protection requirements and to achieve dimensional stability and low particulation. Photo courtesy of RTP Company.

WINONA, Minn.—RTP Company, a global compounder of custom engineered thermoplastics, has expanded its line of conductive compounds to include new CCX Conductive Masterbatches. The next generation conductive masterbatch technologies are reported to set “a new standard for safe, productive, and reliable solutions for environments that are prone to electrostatic discharge (ESD).”

The CCX Conductive Masterbatches are available in a variety of resin systems and can be formulated with four distinct additive technologies: stainless steel fiber, carbon nanotubes, carbon black, and PermaStat® dissipative polymer technology. Each additive technology provides different benefits, depending on the needs and requirements of the application, the company said in a press release.

Stainless steel fiber CCX Masterbatches are created using RTP Company’s long fiber manufacturing process. They allow for the highest level of conductivity, providing EMI shielding for sensitive electronics, colored parts and components, or even FDA compliant applications, the company said. They are available in most resin systems and have shrinkage and mechanical performance similar to those of the unfilled base resin, making them well-suited to injection molding and compatible with existing molds and tooling.

RTP Company’s CCX Masterbatches offer static dissipative performance and full colorability when manufacturing healthcare devices like this blood pressure monitor. Photo courtesy of RTP Company.

Carbon nanotube CCX Masterbatches can be used in high-purity applications and are also said to have virtually no effect on shrinkage or mechanical properties versus the unfilled base resin. Carbon nanotubes, or CNTs,  are hollow structures consisting of graphene cylinders of carbon atoms capped at both ends. When incorporated into a thermoplastic, they provide highly uniform ESD protection and/or electrical conductivity at a very low loading level.

Carbon black CCX Masterbatches have isotropic shrinkage, strength, and stiffness similar to those of the unfilled base resin, but are an economical way to introduce versatile, high performance conductivity for a plastic part.

The company said that its PermaStat® CCX Masterbatches are uniquely formulated for applications that require permanent antistatic or static dissipative performance. These masterbatches can be used in most resins with processing temperatures below 520 degrees Fahrenheit (270 degrees Celsius). They provide uniform dissipative performance, full colorability, and even transparency in some resins, while retaining or even enhancing the impact performance of the base resin.

PermaStat CCX Masterbatches are also well suited to intrinsic safety applications and can meet the surface resistance requirements of the ATEX directive. They are compatible with injection molding or extrusion equipment and require very minimal processing adjustments when incorporated into existing processes, the company said.

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