Polycarbonate is the ideal lens material for corrective eyeglasses and sunglasses due to its light weight, impact resistance, durability and comfort. However, not all polycarbonate for eyewear is created equal.
When original equipment manufacturer Jiangsu Sigo Optical Co., Ltd. decided to upgrade the polycarbonate material used for its corrective and sunglass lenses, it turned to Covestro for a material that would provide improved optical purity and production yield.
Jiangsu Sigo Optical needed a lens-quality polycarbonate material that met a number of market requirements including high optical purity, transmission, shatter resistance, mechanical strength, comfort and toughness.
Jiangsu Sigo Optical utilized two Covestro materials formulated specifically for the optical/ophthalmic market: Makrolon® DP1-1821 polycarbonate for corrective lenses and Makrolon® LQ2887 polycarbonate for sunglass lenses. In addition to supplying the materials, Covestro also provided valuable on-site technical support to ensure the process of qualifying the materials went smoothly. Covestro helped the project team scale up the new material on production lines in just three months.
Jiangsu Sigo Optical Co., Ltd
Covestro (Shanghai) Management Co., Ltd
Optical / Ophthalmic
Corrective and sunglass lenses
Makrolon® DP1-1821 polycarbonate
Makrolon® LQ2887 polycarbonate
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