Q
which kind of polymer made for glasses
I'm a seasoned industrial engineer with a keen interest in machine learning. Here to share insights on latest industry trends.
Glasses are typically made from two primary types of polymers: thermoplastics and thermosetting plastics. For lenses, polycarbonate (a thermoplastic) and CR-39 (a thermosetting plastic) are most commonly used. Polycarbonate offers high impact resistance and is lighter than traditional glass lenses, making it ideal for safety glasses and sports equipment. CR-39, on the other hand, provides excellent optical clarity and is highly scratch-resistant. It was the first thermoset plastic used for eyeglass lenses due to its light weight, low density, and high abrasion resistance. More recently, newer materials such as Trivex have also gained popularity for their balance between impact resistance and optical quality. When it comes to frames, a variety of thermoplastics like cellulose acetate and propionate, as well as nylon-based materials, are preferred for their flexibility, durability, and lightweight properties. These materials can be easily molded into different shapes and designs, allowing for a wide range of stylish and comfortable frames. Overall, the choice of polymer depends on the specific requirements of the glasses, including the desired level of impact resistance, optical clarity, and style.
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