The zipper of trousers is not necessarily metal. There are three common zipper materials, namely metal zipper, resin zipper and nylon zipper.
1, nylon zipper, toothed structure, made of plastic nylon, low cost and durability; Commonly used in backpacks, jackets, pants, sportswear.
2. Resin zipper, also known as plastic zipper, is made of new materials, with light weight, various colors, good wear resistance, no scratch and chemical corrosion resistance, and is often used in sports and leisure products.
3. Metal zippers, generally made of aluminum, nickel or copper, are durable, but have poor smoothness and high cost, and are widely used in denim clothing and leather products.
The function of pants zipper
For decoration
This year, many jeans brands have designed jeans that show the front. The round zipper with contrasting color is full of Harajuku style and a little street feeling, but this kind of jeans is also controversial and does not conform to the aesthetics of daily wear.
In order to take off your pants
Even girls with thin waists rarely take off their pants without zippers, which is related to the stiff fabric of jeans themselves. Only by opening the front openings can she take them off. I want to add here, what should I do if the zipper is broken in the toilet ~ hahaha, I have a headache when I think about it.
Style design
In addition to the zipper, there is also a front button that is convenient to put on and take off, but the button is not as convenient as the zipper, so you will be very anxious when you take off your pants in a hurry. On the contrary, zippers are very convenient and quick.
The origin, invention and development history of zipper
The inventor of the zipper is marketing guru, who has suffered many defeats and wars.
Zipper, in English, refers to a connector that combines or separates articles through continuously arranged chain teeth. It is widely used, not only in the most common clothes, but also in aerospace, medical and military fields. Although it can be seen everywhere, its historical position can be very high-1993. On the occasion of the 0/00th anniversary of the invention of zipper/kloc-0, it was regarded by many critics as one of the most important inventions in the world in the last century, and even called "the miracle of the world" by BBC.
/kloc-in the middle of the 0/9th century, boots were all the rage in Europe and America. After all, at that time, the road conditions were very poor, and it was easy to encounter mud and step on horse manure when walking on the road. Boots can protect pants from pain. But it has more than twenty hooks, which is extremely troublesome to put on and take off. In order to avoid trouble, people don't take off their boots all day, and even go to bed to the extreme-imagine the "grand occasion" of stepping on a pile of mud and a pile of horse manure outdoors and then putting their boots directly on the bed. In view of this situation, elias howe, an American, designed a series of buttons at 185 1, but the structure was complicated and mass production was impossible.
Judson and the zipper he invented.
1893, Judson, a mechanical engineer in Chicago, USA, came up with a method of embedding and separating two rows of buttons with sliding device, which is the prototype of modern zipper, named it "hook lock" and applied for a patent.
Don't think that engineers are all science and engineering men. Judson is the marketing guru in the history of invention. In the later days, many tricks were made. Although they did not succeed, they can be said to be war crimes.
He knew that his new invention needed to be popularized, so he set up a booth for display at 1893 Chicago World Expo. Unfortunately, most people are not interested in this gadget. In this grand gathering with a total attendance of 2. 1 100 million, he only sold 20 such "hooks".
Of course, there are people who know the goods. Lawyer Louis Walker chose to invest. 1894, they jointly established the "global sliding button company" to develop and produce this new type of button. Judson, who is business-minded, not only knows how to promote the Expo, but also knows the truth that "women and children have the best money". He is eager to open the women's boots market and let his invention replace the complicated buttons on women's boots at that time. Unfortunately, his design is too heavy and the locking device technology is immature, which often causes embarrassment at inappropriate occasions or times. In addition, fasteners are easy to rust and get stuck, and no shoemaker buys them. It was not until April 1896 that the company got its first business, from the US Postal Service Company, to install hooks and locks for 20 mail bags, but these products were quickly discarded because of failure, and the customers of the postal service company never came to the door again. In the following years, Judson and his company fell into depression. Although they have repeatedly improved their products and developed new production machines, little progress has been made, and zippers often burst or get stuck.
1905, Judson invented a new type of split pliers and applied for a patent. This time he still wants to do women's clothing business and position this new product as women's clothing. This is an epoch-making zipper anti-theft lock.