Memory foam is a foam material made of polyurethane and other chemicals, which has the properties of sensitivity and viscoelasticity, and can change shape according to the temperature and pressure of the human body, conform to the curves of the body, and provide a comfortable sleeping experience. The English name of memory foam is memory foam, also known as viscoelastic polyurethane foam, that is, viscoelastic polyurethane foam.
The history of memory foam can be traced back to 1966, when the United States National Space Administration (NASA) developed a material that can absorb impact and disperse pressure in order to improve the safety of astronauts, which is the prototype of memory foam. Later, this material was used in medical devices such as wheelchair cushions, hospital mattresses, etc., to alleviate pain and pressure ulcers for patients. In the 80s of the 20th century, the formula of memory foam was made public and began to enter the civilian market, mainly used in mattresses, pillows, cushions, etc.
The advantage of memory foam is that it can adjust the hardness according to the needs of the human body, adapt to different sleeping positions, reduce the pressure on ** and joints, promote blood circulation, and improve sleep quality. Memory foam also insulates vibrations and reduces sleep disturbances.
The disadvantage of memory foam is that it has poor heat dissipation and tends to make people feel stuffy, especially in summer. Memory foam also takes time to adapt to changes in the human body, and if you turn over frequently, you may feel uncomfortable. Memory foam has poor elasticity and cannot provide sufficient support, so it needs to be used with other materials, such as springs, latex, etc.
The ** of memory foam is different because of the brand, density, thickness, additives and other factors, generally speaking, the higher the density, the higher the **, but also the more durable. The density of memory foam is generally between 30-80 kg cubic meters, and the thickness is generally between 2-10 cm. The additives of memory foam include gel, bamboo charcoal, tea, lavender, etc., which can increase the air permeability, antibacterial, aroma and so on of memory foam.
Memory foam is a material that will allow you to sleep more comfortably, but it is also important to choose the right product according to your preferences and needs. The service life of memory foam is generally between 5-10 years, and it is necessary to pay attention to regular cleaning and maintenance to avoid direct sunlight and moisture.