Overview
K-Resin is a styrene-butadiene copolymer (SBC) known for its exceptional transparency and impact resistance. Developed as an alternative to glass and rigid plastics, it combines the clarity of polystyrene with the toughness of polybutadiene. Its amorphous structure contributes to its optical properties, making it a popular choice for applications requiring both visibility and durability. The material is produced through a solution polymerization process, resulting in a polymer with a controlled butadiene content. This balance between styrene and butadiene units determines its mechanical and thermal properties, allowing for customization based on end-use requirements.
Physical and Chemical Properties
K-Resin exhibits a unique combination of high clarity (light transmission up to 90%) and impact strength, outperforming general-purpose polystyrene. Its density is lower than many transparent plastics, reducing material weight in finished products. The material has a Vicat softening point of approximately 90-100°C, suitable for moderate-temperature applications. Chemically, K-Resin is resistant to water, alcohols, and weak acids but may degrade when exposed to strong solvents or UV radiation without stabilizers. Its amorphous nature prevents crystallization, ensuring consistent optical properties across processing conditions.
Main Applications
Primary uses include rigid packaging for food, cosmetics, and pharmaceuticals where product visibility is essential. Blister packs, clamshells, and display cases benefit from its glass-like appearance and shatter resistance. In medical applications, it's used for intravenous components and diagnostic devices due to compliance with USP Class VI standards. The consumer goods industry employs K-Resin for toys, housewares, and point-of-purchase displays. Its ease of thermoforming and compatibility with printing techniques make it ideal for promotional items. Emerging applications include light guides for electronics and renewable energy components.
Safety and Storage
K-Resin is generally recognized as safe for food contact when meeting FDA 21 CFR 177.1810 specifications. Processors should ensure adequate ventilation to prevent accumulation of styrene vapors during high-temperature operations (above 200°C). The material does not require special hazardous material handling under normal conditions. For storage, maintain original packaging in dry conditions below 40°C to prevent moisture absorption (max 0.1% recommended). Pellets should be used within 12 months of manufacture to ensure optimal processing characteristics. Avoid mixing with incompatible polymers like PVC during recycling streams.
B2B Procurement Guide
When sourcing K-Resin, specify required properties such as melt flow index (typically 5-30 g/10 min), haze percentage (<5% for optical applications), and impact strength (Izod values). Food-grade versions require certification documents including EU 10/2011 or FDA compliance statements. Major global suppliers include Styrolution (INEOS) and LG Chem, with regional availability varying by market. Consider ordering trial quantities to test processability before bulk purchases. Pricing fluctuates with styrene monomer costs, with volume discounts typically available for orders exceeding 20 metric tons.
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