J
| Tradename | Material | Manufacturer |
| Jackoboard | EPS sheet | Jackon |
| Jackocell | EPS | Jackon |
| Jackodur | EPS sheet | Jackon |
| Jackofoam | EPS | Jackon |
| Jackopor | EPS | Jackon |
| Jampilen | PP | Jam Polypropylene Co. |
| Jarid | PA 6 | Tanex Plasty |
| Jazz | Recycled PP | Poly Pacific Pty Ltd |
| J-Bond | Proprietary elastomer | Newport Elastomer LLC |
| Jeffol | PUR | Huntsman |
| Jelucel | Wood polymer composite | JELU-Werk J. Ehrler GmbH & Co.KG |
| Jeluxyl | Wood polymer composite | JELU-Werk J. Ehrler GmbH & Co.KG |
| Jertech | HDPE, LDPE, PA, PP, PS | Jer Envirotech |
| J-Flex | SEBS | Newport Elastomer LLC |
| Jiuhmelite | PMMA sheet | Jiuh Mei Enterprise Co. Ltd. |
| JJ Blend | PA 6, PP | J. J. Packagers Private Limited |
| J-Last | SBS | Newport Elastomer LLC |
| J-Poval | Polyvinyl alcohol | Japan Vam & Poval Co. Ltd. |
| J-Prene | TPV (PP/EPDM) | Newport Elastomer LLC |
| J-Rex | HDPE, LDPE, LLDPE | Mitsubishi Chemical |
| J-Soft | Styrenic block copolymer | Newport Elastomer LLC |
| Juner | PA,PBT,PC, PC/ABS, PC/PBT, PP | Zhejiang Juner New Materials Co. Ltd |
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