General Information:

• Product Name: Unplasticized Polyvinyl Chloride (PVC-U)
• Classification: Rigid thermoplastic

Typical Properties:

• Density: 1.35 – 1.45 g/cm³
• Tensile Strength: 40 – 55 MPa
• Elongation at Break: 20 – 50%
• Tensile Modulus: 2,000 – 3,000 MPa
• Vicat Softening Point: 75 – 85°C
• Notched Izod Impact Strength: 2.5 – 8.0 kJ/m² (depends on test conditions and specific grades)
• Coefficient of Linear Thermal Expansion: 60 – 80 x 10^(-6) K^(-1)
• Dielectric Constant: 3.0 – 4.5
• Volume Resistivity: >10^15 ohm.cm

Features and Benefits:

• Rigidity: PVC-U is rigid and durable with good impact strength.
• Chemical Resistance: Offers resistance to many acids, alkalis, salts, and organic compounds.
• Weather Resistance: Exceptional resistance to UV radiation and weathering.
• Non-Conductive: Excellent electrical insulation properties.
• Low Maintenance: PVC-U products typically require little to no maintenance.
• Flame Retardancy: Inherently self-extinguishing and flame retardant.

Applications:

• Building & Construction: Window frames, doors, cladding, and fascia.
• Piping Systems: For potable water, sewage, and drainage.
• Electrical: Conduits, electrical boxes, and cable insulation.
• Medical: Medical devices and components.
• General Purpose: Signboards, profiles, and shutters.

Processing Methods:

• Extrusion (pipes, profiles, window frames)
• Injection Molding (fittings, components)
• Thermoforming (limited applications)

Environmental Impact and Recycling:

• PVC-U can be mechanically recycled, but chemical recycling is more complex due to the chlorine content.
• Proper disposal is crucial as PVC-U combustion can release hydrochloric acid.
• Efforts are being made to improve PVC-U recycling through better collection, sorting, and processing techniques.

Storage and Handling:

• Store in a cool, dry place away from direct sunlight.
• Handle with care to avoid mechanical damage.
• Avoid exposure to high temperatures which can cause deformation.

Safety Information:

• PVC-U is safe for various consumer and industrial applications.
• When processing PVC-U, proper ventilation is essential to avoid inhaling fumes or degradation products.
• PVC-U is difficult to ignite but will release hydrochloric acid and other toxic gases when burned. It should be kept away from open flames.