Industrial Plastics by Industry — Specs, Approvals & Material Guides

Material selection in regulated or high-stakes industries starts with the applicable standard — not with mechanical properties. An FDA 21 CFR approval, a FAA FAR 25.853 qualification, or a MIL-spec designation narrows the candidate list before any other factor comes into play. These 12 industry guides organize material selection around the specific requirements, standards, and approval bodies that govern each sector.

Each guide covers: approved or commonly qualified materials, relevant standards and certifications, a comparison table of candidate materials against industry-specific requirements, sourcing notes (certifications available, typical lead times, REACH/RoHS status), and links to all featured material hubs.

Regulated & High-Performance Industries

Aerospace Plastics

Primary materials: PEEK, Ultem/PEI, PPS/Ryton, PAI/Torlon, G7, Polyimide/Vespel

Aerospace applications require materials qualified to FAA, MIL-spec, or prime contractor specifications. Ultem/PEI (FAR 25.853 heat release — inherent, no additive) is the most specified thermoplastic for aircraft interior structures and brackets. PEEK and PPS handle higher structural loads and temperatures. Torlon (PAI) serves extreme-load bearing and compressor components. G7 (glass silicone laminate, MIL-I-24768/17) is the standard choice for high-temperature insulating brackets and spacers. The guide covers OSU 65/65 heat release requirements, smoke density, and certification documentation typically required for aerospace material procurement.

Standards covered: FAR 25.853, MIL-I-24768, MIL-P-997, ASTM E662 (smoke), OSU 65/65

Medical Plastics

Primary materials: PEEK, Ultem/PEI, PSU/PPSU, PVDF, Acetal Medical Grade

Medical plastic selection depends on sterilization method, biocompatibility requirement, and whether the part is implantable or reusable device-contact. PPSU (Radel) survives 1,000+ steam autoclave cycles at 134°C and is the standard for reusable surgical instrument trays. PEEK (USP Class VI, ISO 10993) serves structural and implant-adjacent applications. Ultem/PEI handles EtO and gamma sterilization with minimal degradation. Medical-grade acetal (POM-C, Acetron GP) is USP Class VI for non-implantable device components.

Standards covered: USP Class VI, ISO 10993 (biocompatibility), ISO 13485 (QMS), FDA 21 CFR

Semiconductor & Wet-Bench Plastics

Primary materials: PEEK, PVDF, PTFE, Ultem/PEI, PFA

Semiconductor fabrication demands ultra-pure materials that do not contaminate the process chemistry or introduce particles. PVDF (Kynar) is the structural workhorse for wet-bench racks, chemical delivery lines, and wet-process fixtures — excellent resistance to HF, H₂SO₄, HCl, H₂O₂, and SC-1/SC-2 chemistries, and weldable for leak-tight assemblies. PEEK handles higher mechanical loads and temperature. PTFE for seals and gaskets where near-zero chemical interaction is required. The guide covers purity grades, outgassing requirements, particle generation considerations, and SEMI standards.

Standards covered: SEMI F57 (wetted materials purity), SEMI S2 (environmental health & safety)

Oil & Gas Plastics

Primary materials: PEEK, PAI/Torlon, PPS/Ryton, PVDF, PTFE

Downhole and process equipment imposes extreme temperature, pressure, and chemical exposure simultaneously. PEEK is the dominant choice for downhole seals, valve seats, and structural components — rated to 480°F continuous, inert to hydrocarbons and brine, and dimensionally stable under sustained load. Torlon (PAI) handles even higher loads where PEEK's compressive strength is insufficient. PPS for pump bodies and valve housings at intermediate temperatures. PVDF and PTFE for chemical-resistant seals and liners in surface process equipment. The guide covers sour-service resistance (H₂S), API material standards, and qualification testing expectations.

Standards covered: NACE MR0175/ISO 15156 (sour service), API material specs

Defense & Military Plastics

Primary materials: G10 and FR4, PEEK, Ultem/PEI, Polyimide/Vespel, Phenolics

Defense applications reference MIL-specifications extensively. G10 and FR4 (MIL-I-24768/27) and the phenolic laminate family carry the broadest range of MIL designations for electrical insulation and structural laminates. PEEK and Ultem serve airborne electronics and structural brackets. Vespel (PI) handles extreme-temperature bearing applications in aircraft and missile guidance systems. The guide covers MIL-I-24768 grade cross-reference and QPL considerations.

Standards covered: MIL-I-24768 (laminates), MIL-P-997 (phenolics), MIL-P-46183 (PTFE), DEF STAN

Food, Beverage & Consumer

Food & Beverage Plastics

Primary materials: UHMW, HDPE, Delrin, PET/Ertalyte, Nylon FDA

FDA 21 CFR and USDA approval determine the candidate list for food-contact plastics. UHMW and HDPE cover the bulk of conveyor, guide-rail, cutting-surface, and liner applications. Acetal (POM-C / Acetron GP) is the precision wear material for food machinery — valve seats, pump components, and metering parts. PET/Ertalyte for bearings and wear pads with low moisture sensitivity. Nylon (FDA/USDA-compliant grades) for bushings and gears where toughness matters. The guide covers 21 CFR 177.1520, 177.2470, and NSF 51 certification, and the distinction between "FDA-grade" stock and food-contact certification of a finished part.

Standards covered: FDA 21 CFR 177 (multiple sections), USDA, NSF 51 (food equipment), 3-A Sanitary Standards

Marine & Outdoor Plastics

Primary materials: Marine HDPE (Starboard), UHMW, Polycarbonate-UV, PVC

Marine environments combine UV exposure, salt water, impact loading, and in most cases FDA requirements for fish-contact surfaces. Marine HDPE (Starboard, King StarBoard) is the dominant material for dock components, tackle box surfaces, cutting boards, and structural marine panels — UV-stabilized, FDA-compliant, and available in a wide color range. UHMW for dock fenders, wear plates, and high-abrasion boat components. UV-stabilized polycarbonate for windows, hatches, and observation ports. Type 1 PVC for structural and plumbing applications below deck. The guide covers UV stability ratings, marine certification, and material selection for saltwater versus freshwater environments.

Infrastructure & Industrial

Electrical & Power Plastics

Primary materials: G10 and FR4, G7, G9, Paper Phenolic, Glass Phenolic, PTFE, Ultem/PEI

Electrical insulation materials are selected on dielectric strength (V/mil), arc resistance (seconds), comparative tracking index (CTI), and temperature class. G10 and FR4 is the standard for PCB substrates and general electrical insulation to 130°C continuous. G7 (glass silicone) serves high-temperature applications to 485°F with excellent arc resistance. G9 (glass melamine) is optimized for arc-chute and switchgear applications requiring the highest track resistance. Paper phenolics (XX/XXX) provide cost-effective insulation for punched and machined parts. The guide includes an insulation class table (Class B through Class H) mapped to NEMA grades.

Standards covered: UL94 (flammability), NEMA LI-1 (laminates), IEC 60672 (ceramic and glass insulation), ASTM D149/D495

Automotive Plastics

Primary materials: Nylon, Acetal, ABS, Polycarbonate, PPS, PEEK

Automotive under-hood and interior applications span a wide temperature range — from ambient interior trim to under-hood environments at 200–300°F sustained. Nylon (PA66, glass-filled) is the most-used automotive engineering plastic for gears, clips, and structural housings. Acetal for precision wear parts and fuel system components. PPS for chemical-resistant pump and valve bodies exposed to coolant and fuel. PEEK for the highest-temperature bearing and seal applications. ABS and polycarbonate for interior trim, lenses, and enclosures. The guide covers automotive-grade material certification, PPAP documentation, and the distinction between production-grade injection-mold materials and machined stock applications.

Transit & Rail Plastics

Primary materials: PEEK, PEI, PPS, Phenolics

Transit and rail applications prioritize fire, smoke, and toxicity (FST) performance, mechanical reliability, and resistance to cleaning chemicals. Ultem/PEI (EN 45545-2 qualified) is increasingly specified for rail interior components. PEEK and PPS serve structural bearing and wear in bogies and brake systems. Cotton and glass phenolics handle insulation in traction motors and switchgear.

Standards covered: EN 45545-2 (rail FST), ASTM E1537, NF F 16-101

Energy & Renewables Plastics

Primary materials: G10 and FR4, PVDF, PEEK, PPS

Renewable energy applications require materials that survive outdoor exposure, aggressive process chemicals, and temperature cycling. G10 and FR4 for structural and electrical insulation in solar mounting and battery management electronics. PVDF for chemical-resistant components in energy storage and electrochemical systems. PEEK and PPS for high-temperature structural parts in concentrated solar and geothermal applications. The guide covers REACH/RoHS compliance and UV stability requirements.

General Industrial Plastics

Primary materials: UHMW, Acetal, Nylon, HDPE, PVC, Polycarbonate

The broadest category — conveyors, material handling, machine guarding, tanks, and general-purpose machined components in manufacturing plants. UHMW for wear liners and guides; acetal for precision machined parts; nylon for gears and bushings; HDPE for tanks and structural panels; PVC for chemical ducts and tanks; polycarbonate for machine guards and glazing. The guide summarizes the most common industrial applications and directs engineers to the specific application guides and material hubs for detailed selection criteria.

Cross-Reference: Standards to Materials