Material information
The following are the most common symbols that may be used on the individual Recognitions to represent the generic material type. The generic material symbols are based upon the terminology developed in the International Organization for Standardization publications covering "plastics-symbols" (ISO 1043) and "rubbers and lattices" (ISO 1629).
| Generic material | Symbol |
| Acrylonitrile butadiene styrene | ABS |
| Acrylonitrile styrene acrylate | ASA |
| Alkyd molding compound | AMC |
| Cellulose acetate | CA |
| Cellulose acetate butyrate | CAB |
| Cellulose acetate propionate | CAP |
| Chloroprene rubber | CR |
| Diallyl phthalate | DAP |
| Dough molding compound | MC |
| Epoxy | EP |
| Ethylene/propylene/diene | EPDM |
| Ethylene/propylene | E/P |
| Ethylene/vinyl acetate | E/VAC |
| Ethylene/tetrafluoroethylene | E/TFE |
| Liquid crystal polymer | LCP |
| Melamine-formaldehyde | MF |
| Melamine/phenolic | M/P |
| Methyl methacrylate butadiene styrene | MMBS |
| Natural rubber | NR |
| Neoprene (chloroprene butadiene) rubber | CBR |
| Nitrile rubber | NBR |
| Perfluoro alkoxyl alkene | PFA |
| Phenol-formaldehyde (phenolic) | PF |
| Polyamide (nylon) | PA |
| Polyamide imide | PAI |
| Polyarylate | PAR |
| Polybutadiene rubber | PBR |
| Polybutylene terephthalate | PBT |
| Polycarbonate | PC |
| Polycarbonate/acrylic | PC/A |
| Polychlorotrifluoroethylene | PCTFE |
| Polyetheretherketone | PEEK |
| Polyether imide | PEI |
| Polyethersulfone | PES |
| Polyethylene | PE |
| Polyethylene terephthalate | PET |
| Polymethyl pentene | PMP |
| Polyoxymethylene (acetal) | POM |
| Polyphenylene ether | PPE |
| Polyvinyl acetate | PVAC |
| Perfluoroethylene propylene | FEP |
| Polyimide | PI |
| Polymethyl methacrylate | PMMA |
| Polyphenylene oxide | PPHOX |
| Polyphenylene sulfide | PPS |
| Polypropylene | PP |
| Polystyrene | PS |
| Polysulfone | PSU |
| Polytetrafluoroethylene | PTFE |
| Polyurethane | PUR |
| Polyvinyl chloride | PVC |
| Polyvinylidene fluoride | PVDF |
| Polyvinyl fluoride | PVF |
| Polyester | PER |
| Sheet molding compound | SMC |
| Silicone rubber | SI |
| Silicone molding compound | SIR |
| Styrene acrylonitrile | AS |
| Styrene/butadiene | S/B |
| Styrene (butadiene) rubber | SBR |
| Styrene maleic anhydride | SMA |
| Styrene/methylmethacrylate | S/MMA |
| Thermo elastomeric | TEE |
| Urea-formaldehyde | UF |
| Unsaturated polyester | UP |
Foamed materials
Materials which have been foamed with the introduction of a chemical blowing agent or inert gas may have significantly different properties than the non-foamed or solid material form. Therefore, ratings that are established for solid (non-foamed) material do not automatically apply to the foamed version of that same material.
Investigation of materials used for structural parts in room air conditioners
Where the retention of physical properties for a material have been investigated for structural parts in specific applications, such as room air conditioners, they are so noted in the individual Recognitions and meet a minimum level beyond which consideration depends on the actual design and use of the part.
Materials for use in special environments
Investigation of materials for specific end-use product applications -- where requirements exist for the retention of properties after exposure to certain critical operating and/or environmental conditions -- may be indicated in the individual Recognitions.
Composite materials
These materials consist of a sandwich-type construction of a metal and a plastic and have been tested for flammability only to determine compliance with UL 94. They may also contain an adhesive which serves to bond the individual components into a composite structure.
