The composite high-density polyether polyurethane (tempur) was developed by the US Space Agency to resolve the pressure on the astronauts, and then gradually applied to various medical and civilian products, especially the pillows made of this material, which are sticky. The elastic characteristics can be automatically deformed according to the change of the position of the head and neck, and the position of tightly bonding with the neck can be maintained at any time, in particular, the head can be fixed, and the head can not be slipped to cause a "slall pillow".
At present, various polyurethane materials can be found on the market to produce pillows, and the prices are also very different. Many consumers complain that the pillows do not rebound after purchase, and there is no texture on the hands. The pillows become too hard or too soft as the weather changes. Wait. In fact, high-grade slow-rebound material pillows have many links that are difficult for general manufacturers to use in their raw materials, production processes and formulations.
You can identify high-grade slow rebound materials from the following aspects:
density
Density is the basic indicator of high-grade slow-rebound material. Generally, it is at least 80 density. However, this is the easiest indicator. Even products of the same density will vary greatly, mainly due to differences in formula, process and raw materials. The resulting high-grade slow-rebound material must be high-density, but only high-density is not necessarily a high-grade material;
Rebound time
Many consumers think that the longer the rebound time, the better. This is a misunderstanding. A good rebound time is about 3-5 seconds. Too short to get a slow rebound effect; too long will make the body stiff (think if you turn over, it hasn't rebounded for a long time;
Manufacturing process
There are two manufacturing processes for slow rebound: cutting and molding. Cutting is the finished slow-recovery sponge that is bought and cut into a pillow; the molding is made by a series of processes such as foaming and vacuuming with a mold, which is complicated. Density, feel, and service life are all related to this;
Feel and temperature sensing
The high-grade slow-recovery sponge feels very comfortable, and it feels like pinching the dough. It’s a little bit slow to get a slow rebound, or it’s stiff. At the same time, this high-grade slow rebound has a good temperature sensing, which will become softer with the increase of temperature. When the human body is in contact with the slow rebound material, the pillow will be softer with the transfer of body temperature. Better wrapping and supporting the human body;
Service life
High-grade slow rebound does not deform for more than 5 years, but the cutting process is manufactured or the quality is poor, usually only 1 to 2 years.
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