Polyamide is present in almost every industrial product you come into contact with every day – from components under the hood of a car, through electrical accessories, to the housing of a refrigerator. It is one of the few materials that simultaneously meets the strength, thermal and chemical requirements of so many different working environments.
In this article, we discuss the applications of polyamide in five key industries: automotive, construction, electrical engineering, household appliances, and IT. For each industry, you will find specific examples of components and an explanation of why polyamide is the material of choice.
Polyamide in automotive
The automotive industry is the largest recipient of technical polyamides – it is estimated that a modern passenger car contains 15-20 kg of polyamide components. The automotive industry has some of the most demanding material requirements: temperature, aggressive media, vibration, impact and certification requirements (IATF 16949). Polyamide fulfils these requirements in a wide range of applications.
Under the hood
This is the most demanding environment – the ambient temperature reaches 120-150°C, and the components work in contact with engine oil, coolant (glycol), fuel and other aggressive media. The standard here is PA66 GF30, whose HDT exceeds 230°C.
Typical components: cooling system ports, air and oil filter housings, valve covers, cable harness brackets, air intake systems, expansion tanks, thermostat housings.
Key properties: thermal resistance (PA66 GF30), chemical resistance to glycol and oils, dimensional stability at changing temperatures, low weight in relation to metal.
Vehicle interior
The interior is a less thermally aggressive environment, but with high aesthetic and impact requirements. PA6, PP and ABS are used here, depending on the application.
Typical components: handles and handles, dashboard components, seat guides and rails, elements of the electric window mechanism, upholstery clips and clips, pedals and levers.
Key properties: good impact strength (especially at low temperatures), surface aesthetics, UV and aging resistance, low weight.
Drive and suspension
Transmission, suspension and auxiliary components require high fatigue strength and resistance to lubricants.
Typical components: wiper and windshield gears, cams and levers, steering components, drivetrain covers and guides.
“In the average passenger car, polyamide replaced dozens of metal components, reducing the weight of the vehicle by several kilograms without losing the strength of the structure.”
Polyamide in construction
Construction is an industry in which polyamide plays a role that is often invisible to the end user – hidden in installations, equipment and structural systems. The key requirements are resistance to moisture, UV (for outdoor applications), mechanical stress and a long product life cycle.
Window and door systems
The thermal profile of a PVC or aluminium window contains a PA66 GF25 insert that acts as a thermal break. It is one of the largest markets for polyamide in the construction industry by volume.
Typical components: thermal breaks for window profiles, hinges and fittings, elements of roller shutter and blind systems, gaskets and spacers.
Installation Systems
Polyamide is used wherever chemical and mechanical resistance is required for long service hours.
Typical components: accessories for pre-insulated pipes (rings, seals), connectors and joint installations, pipe and cable fasteners, cable glands, grommets.
Key properties: resistance to moisture, frost and chemicals used in installations, good impact strength when installed at low temperatures, certification for utilities (water, gas).
Polyamide in electrical engineering
Electrical engineering places two basic requirements on a material: electrical insulation and resistance to elevated temperatures. Polyamide fulfills both – and additionally offers good mechanical strength, which allows for the miniaturization of connectors and housings.
Electrical Connectors Accessories
Electrical connectors are one of the largest markets for PA66 in Europe. Requirements include dimensional stability (precision of contact fitting), thermal resistance and flammability class.
Typical components: plug connector housings, sockets and plugs, terminal blocks, relay and fuse housings, glands and cable glands.
Switchgear and apparatus
Low-voltage switchgear components require flammability class V0 (UL94) and thermal resistance for continuous operation at 130°C.
Typical components: circuit breaker housings, busbars, apparatus housings, fixtures and spacers.
Key properties: flammability class V0 (PA66 FR), electrical strength 20-30 kV/mm, thermal resistance, dimensional stability for precise contacts.
Polyamide in household appliances
Household appliances combine aesthetic requirements with mechanical and thermal ones. Elements visible to the user must look good for years; hidden elements – withstand hundreds of thousands of work cycles.
Typical polyamide components in household appliances:
- Washing machines and dishwashers: pump gears, impellers, drum supports, hinge components
- Refrigerators Freezers: Hinges, Drawer Slides, Sealing Elements, Handles
- Vacuum cleaners: motor gears, head housings, joint components
- Small kitchen equipment: blender and mixer gear components, handles, knobs
Key properties in household appliances: resistance to detergents and cleaning agents, fatigue strength (hundreds of thousands of cycles), good impact strength during assembly, often the requirement for food contact certification.
Polyamide in IT and electronics
Consumer and industrial electronics rely on miniaturization, precision and repeatability. Polyamide – especially PA66 with mineral fillers or GF – meets the requirements of dimensional stability and thermal resistance for heat flow from electronic components.
Typical components: PCB connector enclosures, SIM and memory card slots, component stands and holders, cooling elements and air chains in servers, rack mount enclosures and cassettes, components of data center cable systems.
Key properties: dimensional stability (precision of fit to PCB contacts), flammability class V0 for applications close to active components, heat resistance of soldering processes (for SMT components), good electrical insulation.
Why is polyamide so versatile?
Polyamide dominates so many industries because it is one of the few materials that combines several key properties at once: mechanical strength comparable to that of a light metal, chemical resistance to hydrocarbons and alkalis, a wide range of operating temperatures (up to 120°C continuous for PA66, above 200°C for GF varieties), low coefficient of friction and ease of injection molding.
No other popular technical material offers such a combination at this price. PP has better chemical resistance but lower strength and operating temperature. POM has lower friction but is more expensive and less flexible. PC has better transparency but worse chemical resistance.
Polyamide is also easy to modify – the addition of glass fiber, MoS₂, PTFE, UV stabilizers or flame retardants allows you to fine-tune the properties to a specific application without changing the processing technology.
FAQ – frequently asked questions
At what temperatures can polyamide be used in industry?
Unmodified polyamide works continuously up to 100°C (PA6) or 120°C (PA66). GF reinforced varieties achieve HDT above 200°C and are used in components exposed to temperatures up to 150-160°C of continuous use. This is enough for the vast majority of industrial applications.
Is polyamide resistant to chemicals used in industry?
Yes – polyamide has good resistance to hydrocarbons (petrol, oils, lubricants), alcohols and alkalis. It is not resistant to strong mineral acids and phenols. In applications with aggressive media, it is worth verifying a specific substance-temperature combination before the final selection of the material.
Why is polyamide preferred over metals in the automotive industry?
Three main reasons: weight reduction (polyamide is 6-7 times lighter than steel), elimination of corrosion and lower production cost for large series (injection vs machining). With the right geometry and variety selection (often GF30/GF50), the mechanical properties are sufficient for most non-structural components.
What standards and certifications are required for polyamide components?
It depends on the industry. Automotive requires IATF 16949 and specific OEM standards. Electrical Engineering – UL94 for flammability and IEC standard. Food Contact – EU Regulation 10/2011 and FDA. Construction – PN-EN standards for specific products. Polyamid Plastics works in the ISO 9001:2015 quality system and carries out production for customers who require all of the above certifications.
Can polyamide be used outdoors?
Standard polyamide has limited UV resistance – without stabilizers, it turns yellow and crumbles after several years of exposure. For outdoor applications, varieties with UV stabilizers (HALS) or protective coatings are used. PA66 window thermal breaks include UV stabilizers as standard.
Do you produce components for the automotive, construction or electrical industries? Contact us – we carry out injection molding production of polyamide and other technical plastics for customers from 49 countries.