Overview
Low viscosity PC plastic is a specialized polycarbonate variant engineered for enhanced flow properties during injection molding. It retains the core advantages of standard PC—including optical clarity, high impact strength, and thermal stability—while enabling easier processing for intricate or thin-walled designs. Developed to address molding challenges, this material reduces cycle times and energy consumption in production. Its molecular structure is optimized to lower melt viscosity without compromising mechanical performance, making it a preferred choice for precision components in demanding industries.
Physical and Chemical Properties
With a melt volume rate (MVR) typically 20-50% higher than standard PC, low-viscosity grades exhibit superior flow at processing temperatures of 280-320°C. They maintain a tensile strength of 55-75 MPa and notched Izod impact resistance exceeding 600 J/m. Chemically, these grades resist hydrolysis and UV degradation when properly stabilized. Their refractive index (~1.585) and light transmission (up to 90%) make them suitable for optical applications. The material's thermal deflection temperature (HDT) ranges from 130-145°C at 1.82 MPa load.
Main Applications
In electronics, low-viscosity PC is used for smartphone casings, LED light guides, and SIM card trays where thin walls (as narrow as 0.4mm) are required. Automotive applications include headlamp lenses and dashboard components that demand both optical quality and dimensional stability. The medical industry utilizes this material for sterilizable devices like surgical instrument housings and IV connectors. Its biocompatibility variants meet ISO 10993 standards. Other uses encompass safety goggles, drone components, and microfluidic devices benefiting from its precision moldability.
Safety and Storage
While non-toxic in solid form, PC pellets release trace bisphenol-A above 300°C—adequate ventilation is crucial during processing. OSHA recommends exposure limits below 10mg/m³ for PC dust. Storage requires sealed containers with desiccants to prevent moisture absorption (max 0.02% water content before processing). Prolonged UV exposure degrades unprotected material; UV-stabilized grades should be specified for outdoor use. Fire safety measures should address its self-extinguishing but combustible nature (UL94 V-0/V-2 ratings).
B2B Procurement Guide
Industrial buyers should prioritize suppliers offering technical datasheets with verified MFI values (commonly 20-60 g/10min at 300°C/1.2kg). Key evaluation criteria include color consistency, regrind tolerance (typically up to 30% recycled content), and batch-to-batch stability. For large-volume purchases (5+ tons), negotiate pricing based on resin market indexes. Consider toll compounding services for custom additives like flame retardants or anti-fog agents. Lead times average 4-8 weeks for specialty grades; maintain 2-3 qualified suppliers to mitigate supply chain risks.
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