3M Glass Bubbles K25 Low-Density Hollow Glass Microspheres for Epoxy, PU & Composite Lightweighting

Full Name & Product Positioning Product Full Name: 3M K25 Processing-Resistant Low-Density Hollow Glass Microspheres (Imported from South Korea) A commonly used balanced grade in the K series, combining low density with compressive and processing resistance. Suitable for medium-condition systems in epoxy, PU, and composite materials. A cost-effective choice for lightweight modification. Core Technical Parameters ·   True Density: 0.25 g/cm³ ·   Compressive Strength: 750 psi ·   Physical Form: White fluffy powder ·   Standard Packaging: 30 kg/South Korean original packaging ·   Material: Hollow borosilicate glass ·   Core Characteristics: Lightweight, low-pressure resistant, easy dispersion, high versatility Key Advantages ·   Compared to K1/K15, compressive performance is improved, capable of handling light-pressure processing conditions. ·   Achieves weight reduction while maintaining basic structural stability of products. ·   Good compatibility with epoxy, PU resins, and composite materials, with uniform mixing and dispersion. ·   Helps reduce system shrinkage, improve thermal and sound insulation, and optimize overall raw material costs. ·   Imported grade with stable quality and low impurities, helping to improve mass production yield. Main Application Areas Core Applications: Epoxy products, PU composite materials, industrial coatings, general lightweight filling Suitable Areas: Thermal insulation profiles, lightweight structural composites, anti-corrosion coatings, sealing filling systems Prohibited Scenarios: High-shear injection molding and extrusion, high-pressure molding, ultra-high-strength industrial products, food-contact products