What's eyewear material？
There are many kinds of eyewear, including Plastic eyewear, acetate eyewear, metal eyewear, titanium eyewear and horn frames, etc. Which are classified according to their materials. So, What’s main eyewear material? Here is a detailed introduction, hoping to help you.
Eyewear Material 1: Plastic
Plastic eyewear frames are mainly made of plastic or similar polymer materials. According to its temperature properties, it can be roughly divided into two categories: thermoplastic and somersetting resins. Thermoplastic resin can be repeatedly heated and reformed. Eyewear frames made of such materials are easy to adjust and reshape. Thermosetting resins are difficult to reshape after being formed, so they are often mixed with thermoplastics. They all need to make a mold first, and then heat the resin pellets through an injection molding machine, melt and use the mold for injection molding. The manufacturing process is simple and the production cost is low.
Eyewear Material 2: Cellulose acetate
Cellulose acetate is made by treating cellulose with acetic acid and acetic anhydride using catalysts (sulfuric acid). The cellulose triacetate has 62,5% of acetic acid combined, furthermore is soluble in the reaction of acids; it was put into the water, washed and dried. The compositions for molding of cellulose acetate are prepared with acetate flakes, plasticizers (10-70 parts), pigments and dyes, by mixing these ingredients in cylinder mixers, extruders or in closed mixer (Banbury) at temperatures between 175 ° C and 270 ° C.
The acetate eyewear is fashionable, Rich colors，and it is easier to match the clothing(Especially acetate sunglasses). In recent years, acetate eyewear have become one of the most popular eyewear.
Eyewear Material 3: Metal
Metal eyewear are one of the most popular eyewear at the moment. They have a variety of styles, rich colors, and comfortable wearing, which are deeply loved by consumers. So, what are the commonly materials for metal eyewear?
Monel: This popular alloy of copper and nickel is less expensive than other metals, yet depending upon the quality of plating used-it sometimes discolors or causes skin reactions after long use.
Stainless steel: Stainless steel is one of the most commonly used materials for making metal eyewear. Qualities of stainless steel eyewear frames include light weight, low toxicity and strength; many stainless steel eyewear frames also are nickel-free and thus hypoallergenic.
Titanium: Extremely resilient and corrosion-resistant, titanium is also hypoallergenic and weighs in at 40% lighter than other metals. Available in a variety of color tones, titanium is an ideal material for titanium eyewear.
Beta titanium: Titanium mixed with small quantities of aluminum and vanadium, this alloy is more flexible than pure titanium. Adjustments to your eyeglass fit are therefore done easily.
Memory metal: Frames made of memory metal are composed of a titanium alloy that has approximately 50% nickel and 50% titanium. These eyeglasses are very bendable and will return to their original shape even after they are twisted and turned. Memory metal frames are superb for kids or anyone who is rough on their eyeglasses.
Aluminum: Lightweight and very resistant to corrosion, aluminum boasts a unique look and is frequently used in high-end, exclusive eyewear.
Eyewear Material 4: Buffalo horn
Horn is a lightweight, comfortable and beautiful frame material, while horn from Asian water buffalo is plentiful, few manufacturers have the skill to transform horn into eyewear. Only the most skilled workers at the best frame fabricators have the capability of carving and polishing horn materials in a manner suitable for luxury horn frames.
Eyewear Material 5: Wood or Bamboo
Wood and bamboo are pure natural materials, and the manufacturing process is more complicated than other eyewear frames. Natural wood and bamboo have a unique touch and beautiful texture, and natural materials will have a unique texture after a long time. The disadvantages is that the material has poor flexibility, it is hard to wear, and the comfort is not good enough. In order to prevent the corrosion of sweat armpits and material deformation, the pretreatment has affected the texture. Moreover, the temples cannot be adjusted and the fit is poor.
A pair of eyewear are often not made of the same material, and often combine different materials. The most common pair of eyewear is a combination of acetate and metal. Each material has its advantages and disadvantages. When you buy a pair of eyewear, the most important thing is to find the one that suits you. You want comfortable ones, or you want light, or you want rich colors, or you want to match different clothes, you need to wear different sunglasses.