Overview
Lexan™ is a branded polycarbonate (PC) resin developed by SABIC, renowned for its exceptional mechanical and optical properties. As an engineering thermoplastic, it combines high impact strength with transparency, making it a preferred material for demanding applications. Its versatility extends from consumer electronics to industrial safety equipment. Polycarbonates like Lexan™ are synthesized via interfacial polymerization of bisphenol A (BPA) and phosgene. The resulting polymer chains exhibit amorphous structures, contributing to their glass-like clarity and toughness. Lexan™ is available in various grades, including UV-resistant and flame-retardant formulations, tailored to specific industry needs.
Physical and Chemical Properties
Lexan™ exhibits a unique balance of properties: its tensile strength ranges from 55–75 MPa, while its light transmission exceeds 90%, rivaling glass. The material’s glass transition temperature (Tg) of ~147°C ensures stability under moderate heat, though prolonged exposure above 120°C may cause gradual deformation. Chemically, Lexan™ resists dilute acids, oils, and alcohols but is susceptible to strong alkalis and aromatic hydrocarbons. Its hydrolytic stability is moderate; prolonged contact with water above 60°C can lead to molecular degradation. Additives like UV absorbers or anti-static agents are often incorporated to enhance performance in harsh environments.
Main Applications
In the automotive sector, Lexan™ is used for headlamp lenses, sunroofs, and instrument panels due to its shatterproof nature and weight savings over glass. Electronics manufacturers leverage its dielectric properties for smartphone housings, LED diffusers, and transparent conductive films. Construction applications include bullet-resistant windows, skylights, and noise barriers. Medical grades meet FDA compliance for surgical instruments and dialysis components. Emerging uses include 3D printing filaments and lightweight aerospace components, where its durability-to-weight ratio is critical.
Safety and Storage
While Lexan™ is non-toxic in solid form, dust generated during machining requires ventilation or PPE to prevent respiratory irritation. Processors should avoid temperatures exceeding 300°C to prevent thermal decomposition, which may release trace amounts of BPA or phenolic compounds. Storage recommendations include sealed containers to prevent moisture absorption (which can cause processing defects) and protection from direct sunlight. Pellets should be dried at 120°C for 2–4 hours before injection molding to minimize voids or streaks in finished products.
B2B Procurement Guide
Buyers should specify requirements such as ISO 9001 certification, RoHS/REACH compliance, and material data sheets. Key purchasing considerations include: minimum order quantities (typically 500 kg for standard grades), lead times (2–6 weeks for specialty formulations), and regional availability. Cost-saving strategies include bulk purchasing (discounts often apply at 20+ metric tons) or opting for recycled-content grades, which can reduce prices by 15–30%. Verify supplier testing capabilities for impact resistance (ASTM D256) and optical properties (ASTM D1003) to ensure consistency.
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