The Memory Alloy Eyeglasses Legs Are Made More Thinner
Memory alloy is the favorite frame recommended by the best place to buy eyeglasses because its characteristics are very obvious and can be easily demonstrated, so they often like to fold a memory alloy frame back and forth.
There are many components of memory alloys, such as nickel-titanium alloy, gold cadmium alloy, and copper-zinc alloy. The better quality is nickel-titanium alloy, which is also relatively expensive and has the characteristics of high strength and corrosion resistance of titanium alloy. The eyeglasses legs of this memory alloy are usually made very thin like iron wire, so the weight is also relatively light.
TR-90, also known as plastic titanium, is not a titanium alloy. It is a high molecular weight nylon material that is wear-resistant, impact-resistant, high-temperature resistant and has good toughness. It can also automatically recover after significant bending and is currently the most widely used frame material.
PC (polycarbonate) is a plastic sheet, with high strength and hardness of the PC frame, which is not easily deformed. Its disadvantages are also obvious, such as low toughness, difficulty in adapting to head curves, and easy breakage.
Usually, a metal wire is added to the legs of PC material to increase toughness, which is not available in injection molded frames. PC frames come in a variety of colors and can also be made semi-transparent, so they are often used for sunglasses near me or fashionable, decorative glasses.
An injection molded frame is a frame made of resin injection molding, which is cheaper than a sheet frame. A line mark can be seen at the joint of the template, and there is no metal wire in the mirror leg like in the sheet frame. Mostly used on sunglass near me, optical glasses are generally not recommended to choose this type.
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