Condoms actually have a shelf life. The main thing is that they must be used within this shelf life. Otherwise, it will cause some unexpected pregnancy during sexual intercourse, and the contraceptive effect is not that good. Therefore, people still need to check the shelf life when using it. It is best not to use expired condoms. If used, it will reduce the contraceptive rate. Condoms, also known as condoms, safety condoms, insurance condoms, and wishful condoms. It is one of the simple non-drug ways to prevent conception, and it also prevents the spread of sexually transmitted diseases such as gonorrhea and AIDS. Condoms are usually made of natural rubber or polyurethane, and are long, thin films that wrap around the penis, vagina or anus. One end of the film is closed and usually contains a space formed by a protrusion to store ejaculated semen. As a contraceptive tool, condoms are easy to use, have no side effects, and generally have a contraceptive success rate of 85%. For users who have received special training, the success rate can reach 98%. Linen Cover At the end of the 15th century, Fallopianis invented a condom made of linen and experimented with its use on 1,100 men; none of them became infected with syphilis. emulsion Most condoms are made of latex. About 8% of the population is allergic to latex, so please use with caution. Polyurethane Suitable for people allergic to latex. Condoms made of polyurethane have stronger toughness and thermal conductivity, but are not as elastic as latex and are like a plastic bag. But it can be made ultra-thin to 0.03mm to increase the pleasure of users. No allergies either. New composite nano The new generation of condoms studied by the University of Manchester in the UK will use a new composite nanomaterial, which is a mixture of elastic polymer latex used in traditional condoms and graphene. Super Material Graphene On November 22, 2013, a group of scientists from the University of Manchester in the UK studied the use of super material graphene to produce thinner and tougher condoms. This graphene condom is thin and light, and 200 times stronger than steel. |
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