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Engineering

We strive to be your plastic engineering partner from education to material selection, thru component design.

Custom Fabrication

TriStar excels in custom plastic fabrication from Prototype to Production.

Featured Products
CJ Bearings TriSteel™ Ultracomp® Rulon® Bearings Rulon® Materials Meldin®
Manufacturing

We manufacture a wide range of bearing materials that are ideal for non-lubricated high-load applications.

High Performance Plastics

We have quality High Performance Plastic materials available for the most demanding applications.

Saint-Gobain

TriStar is the exclusive partner for the Rulon, Meldin and Fluoroloy product lines in North America with the largest global inventory for immediate shipment.

Enhanced Materials

Cutting-edge enhancements that improve and extend the performance of polymers, elastomers, and specialized membranes.

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Material Database

With hundreds of high-performance bearing materials to choose from, utilize our material database to filter your search for the exact match for your application.

Technical Library

Our technical library is a knowledge database from application data sheets, brochures to engineering worksheets to research and start your next project.

Tech Talk Blog

A series of quick reads on the best materials for the most demanding applications in your industry.

White Papers

Explore our library of FREE white papers which dive into composite bearings, plastics, and industries where high-performance materials make a significant impact.

The Shooting Star

A monthly technical brief highlighting the latest in bearing material technology. Sign up for auto delivery.

Video Learning Center

We have produced over 100 educational videos ranging from bearing design, bonding plastics surface modification and many more topics.

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About Us

TriStar Plastics Corp. provides engineering, custom fabrication and manufacturing of high-performance plastics and self-lubricating bearings materials. The Company’s capabilities include component design, material selection, prototype, production, manufacturing, and surface modification.

Locations

The Company’s principal location is in Shrewsbury, Massachusetts, with additional sales and distribution centers in Denver, North Carolina, Yorba Linda, California and Hoffman Estates, Illinois. Click here for details and directions.

Employment

We are dedicated to building a company where opportunities exist for hard working people to achieve their maximum potential. Apply today.

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Meldin® 4000 Series | PAI Resin Base

Meldin® 4000 Family

Meldin® 4000 PAI (polyamide-imide) based compounds are manufactured by injection molding with a very limited number of shapes available for prototyping activity.

All 4000 series compounds have common properties that make them suitable replacements for metal components. They are stiff and retain high mechanical strength at elevated temperatures; they are very durable even in harsh applications in regards to wear; and they are chemically compatible with all automotive fluids (fuels and oils).

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Meldin® 4000 Series Grades

Grade Description

Meldin® 4210

This bearing formulation has a very low coefficient of friction and is wear resistant. Meldin® 4210 is an excellent option for high PV thrust washers and seal rings.

Meldin® 4310

An excellent multi-purpose, wear resistant material that is suitable for bearing, thrust washer, and piston ring applications. It also has a low coefficient of thermal expansion and excellent impact resistance.

Meldin® 4320

MELDIN® 4320 components provide good strength and stiffness in addition to excellent fatigue and creep resistance. These components also feature excellent wear resistance and are suitable for thrust washer applications in hydraulic pumps and high PV automotive applications.

Meldin® 4330

This grade supports tight tolerances thanks to it’s very low CoTE and high mechanical and fatigue strength across broad operating temperatures.