| Abbreviation | Definition |
|---|---|
| MPBF | mental plastic body filler's |
| MPC | Multiple Plastic Corporation |
| MPDC | Malaysian Plastics Design Centre |
| MPS | Methanol Perceptible Solids |
| MPW | Modern Plastic Welding |
| MPY | Meallized Polypropylene Film |
| MQD | Maximum Quality Distillate |
| MRPP | Multi Reinforced Polymeric Pipes |
| MSE | Mould Systems Engineer |
| MSI | Migration Series Instruction |
| MVTR | Moisture Vapor Transmission Rate |
| MWD | Molecular Weight Distribution |
| NAPIS | North American Plastics Industry Study |
| NBR | Nitrile Rubber (Acrylonitrile-Butadiene Rubber) |
| NHFR | Non-Halogen Flame Retardant |
| NHT | High Temperature Nylon |
| NOYPI | No Other Year for Plastics Initiative |
| NPPP | Non Packaging Plastics Protocol |
| NPT | National Pipe Tapered |
| NSF | National Sanitation Foundation |