TPU Green Photochromic Masterbatch is a special TPU coloring material combining dynamic light and shadow fun and weather-resistant practicality. It is produced via an integrated process of low-temperature microcapsule coating and twin-screw cooperative extrusion, using high-elasticity modified TPU as the carrier, combined with spiropyran-based photochromic microcapsulesand anti-migration dispersing additives. Its core highlight lies in intelligent color-changing response to light and compatibility with TPU substrates: in UV-free environments, it shows a transparent light grass green with a fresh texture; once exposed to natural light or UV sources, it can switch to a rich emerald green within 1-2 seconds. The color change is reversible with natural transition, and the color difference ΔE is still ≤1.2 after 6,000 repeated color changes. Meanwhile, the microcapsules are specially treated for compatibility, with high fusion degree with TPU substrates, without affecting the products' elastic recovery rate and bending resistance. No adjustment to the original TPU molding process is needed during processing, and it is compatible with various scenarios such as injection molding, calendering and extrusion. Its applications focus on trendy consumption and functional identification fields, such as TPU photochromic backpack pendants for teenagers, TPU color-changing tent ropes for outdoor camping, and TPU green photochromic warning strips for traffic facilities, endowing products with visual appeal and practical value through light and shadow color change.
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