Frame Materials    

[back to sunglasses]

by ~nawo~[Jan 25, 2003]

วัสดุที่ใช้ทำกรอบ แบ่งได้เป็น 2 ประเภทใหญ่ๆ คือ โลหะ กับ พลาสติก ในแต่ละประเภทก็จะแบ่งย่อยลงไปอีกค่ะ
ขอสรุปให้แบบย่อๆนะคะ

Metal Frames
  Monel-
 เป็นอัลลอยด์ ที่มีส่วนผสมของนิกเกิล (63-70%), ทองแดง, เหล็ก (2.5%) และโลหะชนิดอื่นอีกเล็กน้อย
This is the traditional metal used for most sunglass frames. Monel is an alloy containing nickel, copper, iron and other trace elements, with nickel being the primary component (at 63-70%), followed by copper and then iron (at only 2.5%). This material is pliable making it easy to adjust. It holds its finish well, however, it is more susceptible to corrosion and more apt to cause allergic reactions due to its high nickel content. 
  Stainless Steel-
 ทำจากเหล็กและโครเมี่ยม แข็งแรงมาก
 Stainless Steel is made primarily from Iron and Chrome. It is a very strong metal alloy. Stainless steel frames can be made very  thin and still maintain their strength and great flexibility. Like Titanium, it contains no nickel, therefore it is virtually hypo-allergenic and resistant to corrosion.
  Titanium-
 เป็นกรอบที่ราคาสูง เพราะแข็งแรงมากแต่น้ำหนักเบา และไม่ทำให้ผิวถูกกัดกร่อนเพราะไม่ผสมนิกเกิล
This is a premium frame material. Titanium is stronger, with twice the tensile strength of traditional metal  frames and is  48% lighter. Titanium is also 20 times more resistant to corrosion and is hypo-allergenic, due to the fact that it has no nickel. 
  Aluminum-
 เป็นแบบที่นิยมใช้เพราะแข็งแรงและเบา
While aluminum was once very popular, and is strong and light, it is not used quite as much, as it does not weld or solder easily and is somewhat difficult to adjust. Aluminum does have a very unique look and feel to it. 
Plastic Frames
All of the plastic frames at Ultimate Shades Sunglasses can vary from brand to brand.
  Optyl-
 น้ำหนักเบา ทนทาน ไม่เป็นรอยขีดข่วน
 A superior eyewear material . 30% lighter than plastic acetate , thus improving comfort and duration of wear. Frame are scratch-resistant and durable. Optyl can be adjusted or readjusted into any shape when heated to temperatures of 80-100 degrees Celsius       
  Zyl-
 ทำจาก cellulose acetate มีบางคนแพ้วัสดุตัวนี้ค่ะ 
 This is a term used  for a variety of plastic materials used in making  frames, the most common of which is Cellulose acetate. Cellulose acetate is made from a cellulose material extracted from cotton or wood  pulp mixed with anhydride acetic acid, plastisizers and aging stabilizers. This material can be shaped into frames in two ways. It can be formed into sheets from which frames are stamped, or it can be injected into frame molds. It comes in a very  wide range of colors  with good color stability and is easily adjusted. Some people have allergic sensitivity to zyl frames. This is less likely with high quality zyl frames, which usually have an additional protective coating that prevents fading and UV damage to the frame material.
  Polycarbonate- (frames)
 มักใช้เวลาเล่นกีฬา หรือเป็นแว่นนิรภัย
 Frames made from polycarbonate are primarily associated with sport or safety glasses. Polycarbonate is also used for nonprescription shields, where the lenses and frame are molded in one unit. It is also the material used in the type of sports frames held on with elastic straps. In combination with polycarbonate lenses, this material offers optimum impact resistance and eye protection. This material can not be adjusted very well.
  Carbon fiber-
 ปรับเปลี่ยนรูปทรงไม่ค่อยได้ เมื่อดูก็จะรู้เลยกรอบนี้ทำมาจาก Carbon fiber
 This material is made by weaving carbon fibers and nylon togther and while this creates a thin very strong material, it is not very adjustable. Carbon fiber does have a very distinct look and feel to it. Many sunglass companies make a faux carbon fiber frame, to acheive this they use a painting process to give the frame that "carbon fiber" look. 
  Co-Polymide-
 แข็งแรง และบาง ทนทานต่อสารเคมี และไม่ค่อยทำให้เกิดการแพ้เมื่อสวม
This nylon based material is quite strong, can be made thinner and is approximately 30% lighter than traditional zyl frames. Co-Polymide is available in a wide range of colors. It is resistant to chemical damage, and is hypo-allergenic, however it is also somewhat resistant to adjustments.

Reference :

http://www.ultimateshades.com/glossary_of_sunglass_terms.htm