Sunglasses Impact Resistance Test
Sunglasses are one of the most common products in the contemporary era. Sunglasses come in a variety of varieties and colors, such as the currently popular plate sunglasses, metal sunglasses, titanium sunglasses, horn sunglasses and wood sunglasses made of natural materials, etc. , various styles and rich colors, giving consumers a lot of choices. Sunglasses can not only beautify your appearance, but also protect your eyes from ultraviolet rays. But it also has a quality indicator that is very important, and that is the drop ball test.
The drop ball test is mainly for sun lenses. We know that sunglasses are one of the most important accessories of sunglasses. In addition to basic functions such as UV protection, their impact resistance index is also very important. It can ensure that your eyes will not be damaged by lens fragments when you accidentally fall. harm.
Some time ago, I saw a news on the Internet about a lady wearing glasses who accidentally fell down, and the glasses just touched a raised stone, and the cracked lens directly hurt the lady's eyes. danger. Fortunately, the rescue was timely, and the injured's eyes finally recovered. According to the doctor, if the shattered lens had penetrated any deeper, the woman's glasses might have been useless. As a glasses person, I feel very worried after reading this news, and deeply feel the importance of the impact resistance of lenses. I was thinking, is the impact resistance of this lady's lens qualified? In this article, let's take a look at the drop ball test of the lens.
FDA requires sunglasses lenses imported from the United States to comply with the lens impact resistance test requirements of 21CFR801.410, also known as the drop ball test. What is the drop ball test? The falling ball test is to drop a steel ball from a certain height on the convex surface of the lens to observe whether the lens is broken. FDA is used to measure the impact resistance of lenses. The FDA mainly tests the lens, and the lens will be framed with a jig to do this test. The steel ball requires a diameter of 0.625 inches and a weight equivalent to 1 ounce. When dropped from a height of 50 inches, the lens must not be broken.
When the lenses or sunglasses are exported to the United States, they need to pass the drop ball test, also called the bead test. According to the standard 21CFR801.410. Steel balls used for drop impact test to prove that this batch of products exported to the United States meets the requirements of the impact resistance standard and is qualified. When exporting US-related goods, you should pay attention to the US Customs
When customs clearance, not only all FDA manufacturers and product registration numbers must be provided, but also the following factory batch quality inspection documents must be provided. Certification Statement of Impact Resistance Impact-resistant lens manufacturer's statement of conformity (that is, the manufacturer's statement to the FDA that it has carried out the impact resistance test/drop ball test before leaving the factory and passed the test in accordance with FDA regulations, and is a document signed by the person in charge of the manufacturer. ).
Impact Resistance Test Report (also known as the drop ball test report; the drop ball test is the basic test for the final batch inspection of all the above-mentioned related lenses, to prove that the batch of products exported to the United States meets the standard requirements for impact resistance and is qualified; The test report is usually provided only when the relevant customs specifically requires it, and the above statement can generally be used as a certificate of compliance).
Sunglasses are the main products of our factory, including plate sunglasses, metal sunglasses and titanium sunglasses. We pay great attention to the quality of the lenses, and usually pass various strict tests when the glasses leave the factory. Before packaging, we will also carry out detailed inspection, including appearance inspection, function inspection, including drop ball test.
