upvc

uPVC, or unplasticized polyvinyl chloride, is a rigid form of PVC used in construction and plumbing. It is produced by polymerizing vinyl chloride monomer without plasticizers, yielding a stiff, durable thermoplastic that can be extruded into profiles or molded into components.

Its key properties include high weather and chemical resistance, low maintenance, good dimensional stability, and relatively low thermal conductivity when used in profiles. uPVC is inherently flame resistant, but its fire performance depends on stabilizers and additives. Outdoor exposure requires stabilizers to resist UV degradation.

Common applications are window and door frames, piping for potable water and drainage, gutters, and other exterior building elements such as cladding. In plumbing, uPVC’s smooth interior and corrosion resistance make it a long-lasting alternative to metal or some other plastics.

Manufacturing and processing rely on extrusion for profiles and molding for fittings. Stabilizers — such as calcium-zinc or organotin compounds — are added to withstand heat and aging. Lead and tin stabilizers have largely fallen out of use due to health concerns. uPVC is recyclable in many markets.

Environmental considerations include chlorine chemistry and energy use in production, but the long service life and recyclability help offset impacts. End-of-life management and regional recycling infrastructure influence the overall environmental footprint of uPVC products.