- AIN Plastics
- All Foils
- American Felt & Fibre
- Armacell LLC
- The Artus Corp
- Asheville Schoonmaker
- The Berquist Co.
- Biltrite
- C.G. Processing
- Caraustar – Carolina Paperboard
- Chase Walton Elastomers
- Cerex
- Dodge-Regupol Inc
- Ecore
- EAR Specialty Composits
- Fairprene
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- Fralock
- Groendyk Mfg. Co.
- Interface Solutions
- Isovolta
- JaBar Silicone Corp
- Lamatek, Inc.
- MidWest Rubber Sales
- Minor Rubber
- New Pig Corp
- New Process Fibre
- PCI/Brandywine Fibre
- Parker Hannifin
- Piedmont Plastics
- Polymer Technologies
- Reilly Foam Corp
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- Rogers Corporation
- Saint Gobain
- Stockwell Elastomerics
- Superior Felt
- Technical Systems
- Technicor
- Thermoseal Inc.
- Total Plastics
- Tricomp Inc.
- US Samica
- Unifrax Corporation
- VWR Scientific
- Vellumoid
- West American Rubber
- Whatman
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