But some viruses have very small molecular structures. The molecular diameter of HIV is about 150-400 nm, while the molecular diameter of hepatitis B and other viruses is even less than 100 nm. The theory of these viruses is that they can pass through ordinary latex condoms. This also proves the rationality of the American Biological Association's conclusion on the detection of ordinary condoms.
"Under the test conditions, 2.6% (12 of 470 latex condoms) allowed some viruses to penetrate; The median amount of infiltration is 7× 10(-4)ml. The performance of lubricated condoms is similar to that of non-lubricated condoms. Polyurethane condoms have a higher effect than latex condoms, but there is no statistical difference. "
Fortunately, a high-tech company in China-Guilin hublot Health Protection Co., Ltd. produced the "Bilile" brand Wharton composite barrier condom, which will completely rewrite the market perception of condoms in China.
China invention patent: highly blocking the penetration of germs.
Patent number: ZL 20 10533 47 1.0.
The structure of compound barrier condom is: three-layer compound. Both sides are new natural latex, which is rich in some active ingredients. The middle layer is sandwiched by a layer of modified nano-materials (modified polyurethane layer), and the molecular gap is about less than 30 nm. These three compounds become a new type of compound barrier condom.
//Repeated tests by authoritative inspection and testing institutions//
The compound barrier condom was observed by 10000 times electron microscope in the physical materials laboratory of East China University of Science and Technology. It can be clearly seen that the compound barrier condom is obviously divided into three layers. The hole between the two latex layers (A\C) is very large, while the modified nano layer (polyurethane layer) in the middle layer (b) is very dense.
Further detection by Shanghai Institute of Microscopic Spectroscopy shows that when the cross section of the product is enlarged to 20000 times, the diameter of the "pit" brought by other particles is 284 nm when the cross section is cut off. As a contrast, putting AIDS-sized particles of 120 nm aside, we found that the overall compactness of the cross section far exceeded the size of HIV. This further proves the barrier performance of the product to HIV.