璀璨人生阚清子张勋杰:Bedroom articles Inner core Chapter--Slow rebound Pillow

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[Concept]
      Slow rebound, which is commonly known as Memory Foam (Memory Foam), is a kind of open-cell structure (Open-cell) polyurethane polymer, the viscoelastic material has special properties, reflecting the very soft material properties, and has a strong impact energy absorption capacity. This material is very sensitive to temperature molecules, so called warm sense of memory foam
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[From source]
      Memory cotton dates back to 1962, the birth of the United States Space Agency (NASA) study: design of the Apollo command module escape system, this material has been developed for the spacecraft above the seat to absorb the rocket (spacecraft) off, the spacecraft returns to the atmosphere, some unforeseen circumstances (such as falling) to the astronauts when the enormous impact, and to improve the protection of the astronauts seats and comfort.
      Because memory foam was originally born in the United States Space Agency, so it is often a space memory foam, which means from the U.S. space agency's technology. The technology in the U.S. space agency's report "Human Survival in Aircraft Emergencies" was first mentioned in the report's author, is the inventor of memory foam, Charles Yost, a work in time
NASA engineers. In 2005, NASA Spinoff document "NASA Spinoff 2005" in the origin of memory foam and the following decades the development and application of technology to do a more detailed description.
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【Features】
1) The temperature characteristics
       Means for sensing the temperature of the human body, it gradually becomes soft, while the pressure of the human body to absorb the body to adjust to the most comfortable position for the state.
      For people exposed to lower temperatures is not part of their full support force remains;
       Sense to identify the product temperature is the easiest product on the refrigerator cabinet, removed after a few minutes and found that the product will harden; or the product coat away, put your hands above, you can feel the pressure not to give the hand sink is temperature sensing. (The case of hotter weather may not feel so obvious)
2) The viscoelastic properties
      Refers to the product pressure and subsidence, but will not show a strong rebound (such as clay under pressure subsidence);
      When the pressure removed the product will gradually return to the original shape (such as the spring recovery);
      Business will also be "slow rebound" call for "zero pressure sponge", which means lying on top of feeling as if floating in the water when / or cloud, the skin is not oppressive;
      Material can actually slow rebound irregular shape of the pressure regulator is the most balanced state, the slow deformation that can adapt to oppression objects, but also to provide the most uniform support force.
      Human skin blood circulation pressure of 36mmHg, when the memory foam to the pressure distribution of each point, the pressure can be generally reduced to 36mmHg or less, smooth feel of blood, if there is no oppression of the same place, not to say that memory foam no pressure on.
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[Craft]
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1) [filling process]
General use of the cutting process the remaining bits and pieces break, filled in the product, cost, memory foam product manufacturing process is the most simple and inexpensive one.
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2) [cutting process]
      Lines or large cabinet foam, then cut into the required shape, due to production of simple, fast, high yield, relatively low prices. However, the memory performance of the product to maintain short life.
      And only two-dimensional cutting, the surface may be debris, so the quality of the process followed.
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3) [molding]
      Products in a special foam made of a single mold. Can be molded into any shape mold, smooth surface, high density, slow recovery performance maintained for a long time.
      Is the best quality a production process, while making complex and slow process of the three is the highest price.
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[Kam] do not
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1) [density]
      High-density memory foam material of the basic indicators, the general density polyurethane molding process can be done 70 ~ 150D, cutting process can be done 40 ~ 100D, due to technical bottlenecks and equipment differences, the density of the domestic production of polyurethane generally lower than the 100D, which can reach a maximum foreign 150D, followed by the same density if the product will vary widely, mainly formula, process and result of the different raw materials, high-end memory foam material that must be high density , but not necessarily the only high-density high-grade material.
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2) [rebound time]
      Many consumers believe that resilience is the longer the better, this is a misunderstanding.
      Better rebound time is 3 - 5 seconds or so. Too short not achieve slow rebound effect; too long to make the body stiff (think if you turn it up a long time not rebound);
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3) [manufacturing]
      Slow rebound of the manufacturing process, there are two: cutting and molding.
      Cut the finished product is bought memory foam, cut into pillow look, because by cutting rather than forming a mold + additives, do not add other additives so even if the density of pure material can be polyurethane density 40 to 70; The mold is molded by foam, vacuum made a series of processes, complicated. Density increased to about 70 to 100, feel good, and this life are related;
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4) [touch and temperature sensor]
      High-end memory foam feel very comfortable, like kneading dough kneading up the feeling, almost a slow rebound Xuan else feeling a little fat, or a bit stiff.
      At the same time, there is a good slow rebound this high temperature sensor, with increasing temperature and will become more soft, slow rebound when the body and the material in contact with the temperature of the transmission, the pillow will be more flexible, able to better care packages and help the human body;
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5) [life]
      High-end memory foam with more than 5 years will not be deformed, but the manufacturing process or quality of cutting almost, usually only 1 - 2 years
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[Note]
1 pillow can not be washed;
2 velvet pillow can be used directly, removable and washable;
3 for the temperature sensor based polyurethane material, the product changes with the seasons, changes in hardness to a certain extent, is a normal phenomenon;
4 Since most of us are accustomed to traditional pillows and the height, use of this product, just started two days may be accustomed to the place, usually 3--5 days will gradually accustomed to, and in the early morning and daytime feel a sense of the cervical spine was easy
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【Article is excerpted from: Baidu Encyclopedia】
【Network reprint / Just reference】
【Translation is by Goolge】