Excellent Flow Rates, Durability and Dimensional Stability
Eastman Chemical Company, Kingsport, TN/USA, the world’s leading producer of cellulosic materials, introduces Trēva, a versatile, cellulose-based thermoplastic that marries high-level performance and sustainability.
Trēva’s composition is about half cellulose, sourced from trees derived exclusively from sustainably managed forests that are certified by the Forest Stewardship Council (FSC). The new material is BPA-free and phthalate-free. Its excellent flow rates, durability and dimensional stability allow for less material usage, thinner parts, and longer product life, enhancing lifecycle assessments. Trēva offers excellent chemical resistance, standing up better than other engineering thermoplastics to some of the harshest chemicals, including skin oils, sunscreens, and household cleaners. The material’s low birefringence means eliminating the unwelcomed rainbow effect some plastics experience with polarized light, improving the user experience with electronic device screens and retail displays.
Excellent flow characteristics also enable design freedom, allowing Trēva to be used with complicated designs and in filling thin parts. Under recommended processing conditions, recent thin-wall 30 mil spiral flow testing shows that Trēva flow rates are significantly better than polycarbonate and polycarbonate/ABS blends, and comparable to ABS. The material is designed to allow for superior surface gloss, clarity and warm touch and feel, enabled through a combination of the base material and Eastman’s technological expertise. The material also boasts great color saturation, and superior secondary processing and decorating capability, creating additional design and branding options.
Trēva’s superior combination of sustainability and safety benefits, end-use performance improvements, and design and brand flexibility make it ideal material choice for personal devices that come in direct contact with the skin, electronic display applications, such as lenses and covers, electronics, housings, intricate cosmetics cases, as well as automotive interior components wherein chemical resistance and aesthetics are desired.
Eastman Chemical International
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