Eyeglass Frames: It's a Material World By Erinn Morgan, with updates by Gina White
热点直击：海运之多式联运
What are you looking for in eyeglass frames? A wide range of available colors? Durability? Lightness on your face? Hypoallergenic materials? A good price? Uniqueness?
Finding eyeglasses with the qualities that are most important to you is as simple as choosing a frame material: each one comes with its own unique set of strengths that makes it distinct.
Plastic
If you want the colors of the rainbow, then zyl (zylonite, or cellulose acetate) is your material. Zyl is a very cost-effective and creative option for eyewear and is extremely lightweight. Particularly popular right now are laminated zyl frames that have layered colors.
Some manufacturers are also using propionate — a nylon-based plastic that is hypoallergenic. It's lightweight and has a different look and feel than other plastics.
This sunglass is mostly nylon, with stainless steel hinges for extra strength. Vestra, by Lazi.Eyeglasses made of nylon were first introduced in the late 1940s. Because of brittleness and other problems, eyeglass manufacturers switched to blended nylon (polyamides, co-polyamides and gliamides). Today's blended nylon frames are both strong and lightweight.
Nylon is also a premier material for sports and performance frames — typically made of gliamides, which are very resistant to hot and cold and are more flexible, yet also stiff. Nylon is also easily molded into today's popular wraparound styles, as well as other shapes that are difficult to produce.
Plastic frames do have some drawbacks. They are easier to break than metal frames, they will burn (but are not easily ignited), and aging and exposure to sunlight slightly decrease their strength but do not affect color.
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