【Popular Science Tips on Polymers and Materials】--021 Popular Science Tips on the Materials Used in Raincoats + ljtjbx

Polytetrafluoroethylene (PTFE) waterproof and breathable laminated fabric is created by using a special adhesive to combine PTFE microporous film with ordinary fabric through a lamination process. This fabric boasts excellent water resistance, breathability, wind protection, and warmth retention. Not only does it have outstanding performance, but it also features advantages such as a wide range of applications, flexible design, and low environmental impact. Structure of laminated fabrics: Laminated fabrics can have various structural designs and numbers of layers, depending on the requirements of their intended use. The two-layer composite can be a combination of fabric and film, using a lined structure ； It can also be combined with film using a flexible surface structure, which makes it easy to clean and is suitable for civilian sportswear and winter clothing. Three-layer composite involves combining fabric, film, and lining together; although it has a slightly harder feel, it improves wear resistance and is suitable for military combat uniforms and protective work clothing. Four-layer or multi-layer composites can enhance the functionality of laminated fabrics, serving as gas-barrier layers, liquid-barrier materials for protective gear, and far-infrared cotton insulation materials. Both face and back fabrics should have a certain density to prevent glue leakage during bonding. To control the total weight of the laminated fabric, the face and back materials should preferably use fine or ultra-fine denier polyester or nylon. Depending on the usage requirements, the facial department can also use functional fabrics with features such as camouflage, flame resistance, anti-static properties, oil and water resistance, easy cleaning, and acid-alkali resistance. Applications of waterproof and breathable fabrics: PTFF waterproof and breathable laminated fabrics were first developed for the production of military and protective clothing, and later used in the manufacturing of sports apparel, tents, and other products. Their areas of application continue to expand. For air force pilots, naval soldiers, and special forces personnel, a drop in body temperature caused by sudden immersion in cold water is one of the major factors leading to casualties. The U.S. military has designated waterproof and breathable clothing as specialized riot-control gear for air force pilots, crew members, and special forces troops engaged in land, sea, and air operations. Such clothing provides up to 2 hours of protection in cold water at 7 degrees Celsius, and it is lightweight and comfortable to wear. The main technical requirements for military raincoats are good water resistance and breathability, as well as low weight. PTFE microporous composite fabric not only resolves the conflict between breathability and water resistance, but also reduces the weight of raincoats, thereby effectively lowering the burden on soldiers. The fire-resistant suit uses woven aramid fabric for the outer layer, PTFE for the membrane, warp-knitted aramid fabric for the inner layer, and a phosphorus-containing polyurethane as the adhesive. It improves the comfort of wearing protective clothing. Military lightweight tents require properties such as rain resistance, flame retardancy, and aging resistance; PTFE film material boasts corrosion resistance, tolerance to strong acids and bases, as well as aging resistance, so PTFE-laminated fabrics can be used. Sleeping bags need to be warm, breathable, and lightweight. Taking advantage of the properties of PTFE microporous membrane laminated fabric, a double-layer structure is used: the outer layer is made of nylon fabric, while the inner layer is made of PTFE membrane. There is no risk of oxygen deficiency or carbon monoxide poisoning when using this sleeping bag. Due to the exceptional chemical resistance and flame-retardant properties of PTFE material, coupled with the microporous structure of the film which provides superior water (liquid) and air permeability, it makes an ideal material for developing nuclear, biological, and chemical protective clothing. PTFE waterproof and breathable laminated fabrics can not only meet the clothing needs of people in harsh environments such as extreme cold, snow, and strong winds, but are also suitable for the requirements related to raincoats, shoes, etc. in daily life, offering broad prospects for application and development. The focus of research and development on future PTFE waterproof and breathable laminated fabrics is to reduce costs, while striving to make the fabrics lighter, more comfortable, and more versatile.

Police raincoats, also known as split-type waterproof coats, are made from high-quality PVC material. The fabric is soft and comfortable, waterproof and breathable, and does not delaminate. Seams are sealed using leak-proof techniques. Made from non-toxic, odorless, lightweight, and soft environmental-friendly materials, they are harmless to the human body. They offer excellent waterproof performance, and have reflective strips on the back to improve safety when used at night. 1. Police raincoats are crafted from high-quality PVC material, with seams sealed to prevent leaks, ensuring that the clothes remain dry even during heavy rain； 2. The fabric is made from an eco-friendly material that is waterproof and breathable, non-toxic and odorless, lightweight and soft; it causes no harm to the human body, is comfortable to wear, and does not delaminate ； 3. Such products have good waterproof performance ； 4. This raincoat is suitable for police officers, security personnel, and others who are on duty or patrolling, as well as for use in flood control and emergency rescue operations.

The quality these days is getting worse and worse.

What’s available on the market currently are just ordinary plastic sheets put together, which can be torn apart easily. It’s cheating!

So you mean, you introduce a high-energy product, and then the market doesn’t produce it, is that it? :o

The market has plenty of them; it’s just that people don’t buy the legitimate ones. Just look – when it rains, at every subway entrance and under overpasses, there are those umbrellas and raincoats selling inferior products with no quality guarantees. Some outsiders or locals who didn’t bring it bought it for just a few dollars.

Is that so? Pick one of good quality with a ten-year shelf life for me. Last time, a colleague at work gave me a set of raincoats, and I thought they were nice. Returning home to visit the graves, with a whoosh, a big gap appeared.

No matter how good a raincoat is, it will get damaged if worn like you are. Top 10 Rainwear/Coat Brands: Hongsheng Rainwear, English INLUN, Yongkang Rainwear, Bailaiwang, Taimao Rainwear, Tianle Rainwear, Tiangang Rainwear, Hongdou Rainwear, Yifangtian Rainwear, SUNCITY

Never mind, I’d better get a raincoat; it’s more environmentally friendly. {:1_90:}

It’s purely for learning and gaining knowledge