Warm memory
The temperature-sensitive memory foam was developed by HEALTHMAN, a subsidiary of NASA in the 1960s. It is an open cell structure. It has the characteristics of temperature-sensitive and decompression. It is called a kind of temperature-sensitive and decompression material. The American company HEALTHMAN applies this material to the space shuttle. In order to relieve the pressure on the astronauts and protect the spine of the astronauts, especially when the space shuttle returns to and leaves the ground, the pressure on the astronauts is the greatest and most dangerous. In order to protect the safety of astronauts, this material was invented. In the early 1990s, the Swedish company Fagerdala was once again developed as a civilian (medical) product, which was first widely promoted and applied in medical emergency and monitoring systems. Then it spread rapidly in developed countries, especially in health-conscious countries like Japan.
Flocking
The improved U-shaped pillow airbag made of PVC material has the soft support of the U pillow, and is portable and easy to store. It is very common in general travel, driving, office, classroom and other places. However, because PVC itself is relatively hard, in order to soften it, plasticizers are often added in the production process. Also known as phthalates, ordinary PVC materials may contain 20% to 60% phthalates (esters). The harm of phthalates is: Phthalates (Phthalates) play a role similar to estrogen in humans and animals, increase the risk of women suffering from breast cancer, and also endanger their future male babies The reproductive system has a more obvious impact on children’s health. In addition, when the fluff is pasted on the PVC surface, an adhesive is added, which makes the product more toxic.
Double structure
Due to the non-washable nature of PVC material, flocking U pillows face cleaning problems. Generally, it cannot be used again after a certain number of times of use, which reduces its service life, and a large amount of discarded PVC materials will cause environmental pollution problems. Therefore, a double-layer structure has appeared on the market, that is, the structure of the inner liner + outer jacket. Among them, U-healer's magnetic therapy health U pillow is the most well-known representative. It uses environmentally-friendly and healthy materials to make an inflatable liner, without the health hazards of general PVC. At the same time, because the outer jacket is made of soft flannel, it is softer and more comfortable, and the wearing texture is more similar to the material of memory cotton.