What material is good for sunglasses_Sunglass lens material classification

The material of the sunglasses is more important than the shape and color of the sunglasses. A really good pair of sunglasses should not only have a gorgeous appearance, but also have good anti-ultraviolet and anti-glare functions, and also have a certain degree of impact resistance. And these are determined by the material of the sunglasses lens. Sunglasses lenses can be divided into plastic lenses, glass lenses, polarized lenses, photochromic lenses, resin lenses, PC lenses, acrylic lenses, etc. according to their materials. The following editor will introduce to you what material is good for sunglasses.

Sunglasses lens material classification

1. Glass lens

Glass lenses are what we often come into contact with. The most prominent advantage of glass lenses is that their optical properties are very stable. This is the consistent advantage of glass lenses. Affected by frame pressure. The disadvantage of glass lenses is that they are easily broken, which can easily cause damage to the eyes. At present, the newly developed strengthened glass lens has much more outstanding performance than ordinary glass lens, and is also regarded as a kind of safety lens.

2. Polarized lenses

This is a lens used in polarized sunglasses. It uses the principle of polarization of light to block the glare from all sides outside the lens, making the line of sight clearer and safer when driving. In 1937, Edwinland Bausch & Lomb of the United States invented this lens, which was later widely used in polarized sunglasses. He also took advantage of the opportunity to create his own Polaroid company.

3. Photochromic lenses

Also called photosensitive lenses, the color of the lens will change accordingly due to changes in light, so that the eyes can adapt to different environments. Under strong light, the color of the photochromic lens will deepen, and under the light, the color of the lens will automatically become lighter. . This kind of lens has been used in myopia sunglasses, and this kind of sunglass in the form of photochromic lenses is also considered to be the most convenient and beautiful myopia sunglasses, which is more popular than the clip-on type.

4. Plastic lens

This is a material that many sunglass brands like to use very much. It is light and not fragile is its most obvious feature. The UV protection function of plastic lenses without any treatment is obviously better than that of glass lenses, and the color treatment of plastic lenses is also simpler. . The disadvantage of plastic lenses is that they are wear-resistant and easy to scratch. When the lens is impacted, it is also easy to deform, so you should be more careful about its maintenance.

At present, there are mainly three kinds of plastic lens materials, namely resin lenses, PC lenses, and acrylic lenses.

5. Resin material sunglasses lens

Friends who often wear glasses must have heard of resin lenses, but what exactly are resin lenses? Resin (CR-39) is actually a chemical substance with a phenolic structure, which is refined from phenolic components in petroleum. It is characterized by light weight, high temperature resistance, strong impact resistance, and can effectively block ultraviolet rays and other functions. The biggest advantage of using resin lenses in sunglasses is that they are easy to color. Many fashionable sunglasses use the properties of resin lenses that are good for coloring. However, resin lenses have poor toughness and are not impact resistant. This type of sunglasses has a wide range of uses and a strong decorative effect, making them the best choice for fashionistas.

6. PC material sunglasses lens

PC refers to polycarbonate, which is a kind of plastic (referred to as PC). It is a high molecular polymer containing carbonate groups in the molecular chain. PC material lenses are simply plastic sunglasses lenses. This material also has There are PC chips commonly used by professional athletes and colored or colorless plastic chips that cost a few cents a set. It is characterized by lightness and good coloring performance, but its disadvantages are low wear resistance and unstable optical properties. Sunglasses made of PC are more suitable for sports people and drivers.

7. AC film (acrylic lens)

It has excellent toughness, high perspective, good anti-fog, lowest cost, brittle material, brittle chips when broken, and average optical stability.

8. Nylon sunglasses lens

Nylon sunglasses are mostly used in sports brand sunglasses and high-quality big-name sunglasses. It has high elasticity, excellent optical quality, and strong impact resistance. When nylon lenses were invented, they were used as eye protection glasses. Professional protection function. However, nylon lenses have poor abrasion resistance and high production costs. These sunglasses are more suitable for sports or professional protective glasses.

9. TAC material sunglasses lens

TAC sunglasses lenses are widely used in China. TAC has a very complex composition and is one of the polymer materials with high penetration. As a sun lens, TAC has the characteristics of acid and alkali resistance, light and thin texture, and high cost performance. However, the poor wear resistance has become the soft foot of TAC lenses, as well as its unstable optical characteristics, which is also the reason why TAC lenses are eventually abandoned by most foreign well-known brands despite their low price.