Frame materials
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Cellulose acetate, nylon, and titanium are common materials used for eyeglass frames. Cellulose acetate is lightweight but can cause allergic reactions. Nylon is strong, flexible, and hypoallergenic. Titanium is very lightweight and strong, resistant to corrosion, and hypoallergenic, but more expensive than other materials. Other materials used include aluminum, stainless steel, gold, and plastic materials like polycarbonate. The ideal frame material is lightweight, strong, resistant to corrosion and breakage, non-flammable, inexpensive, durable, adjustable, and non-allergic.
Frame materials
- 2. •Non allergic •Resistant to corrosion •Nonflammable •Inexpensive •Durable •Adjustable An ideal lens materials qualities .
- 3. Cellulose nitrate widely used. It accept a good polish, but is flammable in high temperature. PLASTIC FRAME MATERIALS
- 4. CELLULOSE NITRATE It is hard Retained its shape even in hot climates. Easy to workup on Disadvantage is that it is inflammable.
- 5. CELLULOSE ACETATE Less inflammable . Stability is low. Allergic reactions
- 6. CELLULOSE PROPIONATE It is used in combination frames.
- 7. Nickel silver Also known as Germen silver. Resistant to corrosion.
- 8. Optyl Epoxy resin is used for spectacle frames and is known under the trade name of Optyl Optyl 30% lighter than cellulose acetate. It is highly stable. It is appropriate for those who might be allergic to other type of frame materials
- 9. Nylon & nylon based materials. 1.Nylon- High flexibility . Previously used extensively for spots eye Wear.
- 10. 2.Polyamide/co polyamide It is a nylon based material. It is strong. It can be made thinner only 72% weight of cellulose acetate.
- 11. Cont….. It is resistant to chemicals &solvent. It is opaque & translucent . Hypoallergenic.
- 12. Grilamid It is a nylon based material. Used in sports & performance type of eye wear. Large variety of color possibilities.
- 13. Carbon fiber Used to create a thin strong frame. Made from carbon combined with nylon. Light weight . Carbon fiber is 60% the weight of cellulose acetate. Frame color will be opaque & are limited.
- 14. DISADVATAGE Problems in breakage in cold weather
- 15. Polycarbonate It primarily for sport or safety purposes. Very impact resistant. The type of sports glasses that are held in place with elastic straps
- 17. Safety frames with plano lenses can be molded as one unit. It may be used either alone or worn over conventional glasses
- 19. Kevlar Kevlar is a material that is also mixed with nylon. It, too is a strong, lightweight ophthalmic frame material. Stable over a large temperature range, but is difficult to adjust. Pliable with heat, it will not shrink or stretch.
- 20. Rubber Sports eyewear and sunglass frames may be made from a combination of nylon and rubber. As would be expected, these frames are flexible and will return to their original shape, but are not adjustable
- 22. Anodized aluminium Lightweight. Inexpensive. Resistant to corrosion.
- 23. Stainless steel Highly resistant to corrosion. Stable. Easy to manufacture.
- 24. Gold Very attractive . Resistant to corrosion. Non allergic.
- 25. Nickel-Based Materials It is strong and malleable. Number of people who may have an allergic reaction to nickel.
- 26. Pure Nickel. Nickel Silvers. Monel Metal.
- 27. Aluminum Aluminum is both strong and extremely lightweight. Aluminum does not solder or weld well, It holds the adjustment well, but has no flexibility. If it bends, it stays that way.
- 28. Stainless Steel o It is made mainly from iron and chrome and is highly resistant to corrosion. o Stainless steel is strong. o It made very thin has an element of springiness and flexibility o Stainless steel is one of the more non allergenic materials
- 29. Titanium Titanium is a versatile and abundant material that has become increasingly common for use in ophthalmic frames.
- 30. Advantages Light in weight .,titanium is 48% lighter. Titanium is very strong, which allows titanium frames exceedingly thin.. Titanium is very corrosion resistant. Excellent choice for people in hot climates Titanium is hypoallergenic.
- 31. Disadvantages of titanium Titanium is hard to solder or weld. Because the manufacturing process is more demanding, Titanium is more expensive than conventional materials.
- 32. Certified 100% Titanium—All major components of the frame are at least 90% titanium by weight and, no problems with wearer allergy, the frame must not contain any nickel Certified Beta Titanium—All major components of the frame are at least 70% titanium by weight, and there must be no nickel content
- 34. Bronze Bronze is a metal alloy traditionally made from copper and tin. Is corrosion- resistant, Lightweight , and takes color well.
- 35. Magnesium Magnesium is even lighter in weight than titanium. Exceptionally durable.
- 36. Other Materials and Alloys There are other materials that are also suitable for frames, including cobalt, palladium, ruthenium, and beryllium.