Overview
Impact-Resistant COC (Cyclic Olefin Copolymer) is a high-performance thermoplastic that combines the clarity of glass with the durability of engineering plastics. It is particularly valued for its ability to withstand mechanical stress without compromising optical properties. This material is increasingly replacing traditional materials like polycarbonate and PMMA in demanding applications. COC polymers are synthesized through copolymerization of ethylene and norbornene, resulting in a unique molecular structure that provides exceptional impact resistance. The material's versatility makes it suitable for both rigid and flexible applications, depending on the specific formulation and processing conditions.
Physical and Chemical Properties
Impact-Resistant COC exhibits a unique combination of physical and chemical properties that make it stand out among transparent thermoplastics. Its density is slightly higher than water at approximately 1.02 g/cm³, while maintaining excellent light transmission properties comparable to optical glass. The material demonstrates remarkable resistance to polar solvents, acids, and alkalis, making it suitable for harsh chemical environments. The thermal properties of COC include a glass transition temperature typically ranging between 70-180°C, depending on the specific grade. This allows for sterilization at elevated temperatures, a critical requirement for medical applications. The material's low moisture absorption (<0.01% at 23°C) ensures dimensional stability in humid conditions, while its inherent antistatic properties reduce dust accumulation on surfaces.
Main Applications
The medical industry represents one of the largest application areas for Impact-Resistant COC, where it is used for syringe barrels, IV components, and diagnostic devices. Its clarity, chemical resistance, and biocompatibility meet stringent healthcare requirements. In optical applications, COC serves as a lightweight alternative to glass in lenses, prisms, and display components. Packaging represents another significant market, particularly for pharmaceutical blister packs and food containers where barrier properties are essential. The electronics industry utilizes COC for LED components, optical fibers, and display films. Recent developments have expanded its use in microfluidics and lab-on-a-chip devices, leveraging its precision moldability and chemical inertness.
Safety and Storage
Impact-Resistant COC is generally regarded as safe for handling under normal conditions, classified as non-hazardous according to GHS standards. However, standard personal protective equipment should be used during processing operations that generate dust or fumes. The material is not known to release harmful substances under typical processing temperatures. Proper storage involves keeping the material in its original packaging in a dry environment below 30°C. Although COC is not hygroscopic, prolonged exposure to high humidity should be avoided to prevent potential surface condensation. Pellets should be protected from direct sunlight to maintain optical properties, and containers should be kept tightly sealed when not in use.
B2B Procurement Guide
When procuring Impact-Resistant COC, buyers should first identify the specific grade required for their application, as properties can vary significantly between formulations. Medical-grade COC must meet USP Class VI or ISO 10993 biocompatibility standards, while optical grades require precise refractive index specifications. Lead times for specialty grades can range from 4-12 weeks, so advance planning is recommended. Bulk purchases (typically >500kg) often qualify for volume discounts, but minimum order quantities vary by supplier. Technical data sheets should be reviewed for key parameters including melt flow rate, haze value, and impact strength. Established suppliers include Topas Advanced Polymers, Mitsui Chemicals, and Zeon Corporation, each offering proprietary COC formulations.
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