EPE is developable polyethylene, also known as pearl cotton. Non-cross-linked closed-cell structure, it is a high foam polyethylene product produced by extrusion of low density polyethylene (LDPE) as the main raw material, which is composed of numerous independent bubbles produced by physical foaming of low density polyethylene lipid. It overcomes the shortcomings of brittle, deformation and poor recovery of common foam. It is waterproof, shockproof, sound insulation, heat preservation, good plasticity, strong toughness, recycling, environmental protection, strong impact resistance and many other advantages, but also has good chemical resistance. Sponge is ly made of polyisocyanate and polyol as raw materials to synthesize, the basic reaction is the reaction of polyol and polyisocyanate to produce polyurethane, commonly used sponge is called polyurethane soft foam rubber, polyurethane is the common kind of polymer material in life, widely used in the production of various “sponge” products. As well as shock absorbers, anti-friction elastic materials EVA is made of ethylene (E) and ethylene acetate (VA) copolymerization and referred to as EVA. EVA is characterized by good softness, rubber-like elasticity, good flexibility at -50℃, good transparency and surface gloss, good chemical stability, good anti-aging and ozone resistance, and no toxicity. Good mixing with filler, good coloring and forming processing. EVA can be injection molding, extrusion, blow molding, rolling, vacuum thermoforming, foaming, coating, heat sealing, welding and other molding processes, can be used as building materials used as waterproof, fire, sound insulation and other functions of the three differences mainly have the following points: 1 with the naked eye can be distinguished, sponge is generally slightly yellow, very elastic, relatively lighter than these three. EVA is a bit hard, usually black, and is the heaviest among the three. EPE pearl cotton is generally white, which is easy to distinguish from sponge. Sponge can be divided into its original state no matter how you press it, while EPE pearl cotton will hear patter sound when you press it hard, and the place where you press it will be concave. 2.EPE pearl cotton has wavy pattern and looks like it has a lot of foam stuck together. It’s very light.EVA is solid. What’s the partial concentration? It’s heavy.

Some sponges are poisonous. Those that are soft and colourful are likely to be poisonous chemicals. The commonly used sponge is made of foamed plastic polymer, and the recycled sponge is a new type of product, which is mainly formed by crushing, stirring, and high-temperature sterilization of glue steam. Its advantages are good elasticity, good resistance, no odor, and the production cost is lower than that of ordinary sponges. Why do sponges catch fire so badly? Ordinary sponges are actually not very easy to catch fire, and the combustion of sponges requires the presence of heat and oxygen to occur. The sponge will not burn unless it encounters an open flame. For example, an unextinguished cigarette butt falls on the sponge. Under the action of high temperature, the sponge is easily melted, wrapping the cigarette butt, so that the cigarette butt is isolated from the air and extinguished. But the sponge is still very easy to catch fire under the action of an open flame. There are a lot of pores in the sponge. The lower the density of the sponge, the higher the porosity, the lower the ignition point, and the easier it is to catch fire. The pores in the sponge are equivalent to expanding the contact area between the fuel and the air. Therefore, the sponge burns faster and at a higher temperature than ordinary materials. What’s more serious is that after the sponge catches fire, the smoke emitted by the sponge also contains toxic gases. Common sponges in the market include polyurethane type, polyethylene type and polystyrene type. When these types of sponges are burned, they will release toxic gases containing cyanide, carbon or benzene, and the human body will suffocate quickly after excessive inhalation. From the material point of view, the recycled sponge is synthesized from sponge scraps. The properties of the base material are similar to those of ordinary sponges, and the ignition characteristics should be similar.

Latex generally refers to a colloidal emulsion formed by dispersing polymer particles in water. It is customary to refer to the aqueous dispersion of rubber particles as latex; the aqueous dispersion of resin particles is called emulsion. Latex products processed from latex as raw materials, also known as latex products, such as sponges, gloves, toys, hoses, etc., are widely used in daily life. Classification natural latex It flows out from rubber tree tapping (see natural rubber), which is milky white, with a solid content of 30% to 40%, and the average rubber particle size is 1.06μm. Fresh natural latex contains rubber components 27%-41.3% (mass), water 44%-70%, protein 0.2%-4.5%, natural resin 2%-5%, sugar 0.36%-4.2%, ash 0.4% . In order to prevent natural latex from coagulating due to the action of microorganisms and enzymes, ammonia and other stabilizers are often added. In order to facilitate transportation and processing, natural latex is concentrated to a solid content of more than 60% by centrifugation or evaporation, which is called concentrated latex. Natural latex is mainly used in sponge products, extruded products and impregnated products. synthetic latex Generally, synthetic latex (such as polybutadiene latex, styrene-butadiene latex, etc.) with a solid content of 20% to 30% can be obtained by emulsion polymerization. In order to make the solid content reach 40% to 70%, the rubber particles are ly agglomerated into larger particles, that is, in the industry, measures such as adjusting the polymerization formula, adding agglomerating agents, stirring, pressurizing, freezing, etc. Natural rubber latex is concentrated in a similar way. Synthetic latex is mainly used in industrial sectors such as carpet, paper, textile, printing, coatings and adhesives.

Memory foam refers to a polyether polyurethane foam sponge with slow rebound mechanical properties, which is a special sponge developed by a European company. When the flat memory foam surface is pressed by hand, a fingerprint will appear and then slowly disappear. This is the iconic effect of memory foam – “slow rebound”, and it is difficult for other materials to imitate the slow speed of its rebound. The memory foam is soft to the touch. When you hold the memory foam with your hand, you will feel that the palm of your hand is constantly empty, such as an hourglass. When people sit on the memory foam waist pad, they will feel the gradual settling process, like falling into a quagmire, and hear the subtle sound of the continuous flow of gas in the memory foam; when people sit on the memory foam waist pad, they will be deformed continuously at , and then the sense of resistance will disappear. , and the back pain that should have appeared after sitting for a long time, it is hard to find traces. Comprehensive performance (1) It has performance in mechanics such as absorbing impact force, reducing vibration, and releasing low rebound force; it is a buffer material to protect the body of astronauts when the space capsule lands, and it is the material for the packaging of valuable instruments. (2) Provide uniform surface pressure distribution; adapt to the surface shape of external pressure through stress relaxation, so as to reduce the pressure at the point to a , thereby avoiding the parts with microcirculation pressure, and it is a long-term bed rest to effectively prevent bedsores. It can gently maintain the shape of foreign objects and is a good material for posture cushions. (3) Molecular stability, no toxic and side effects in contact with human body, no allergies, no volatile irritating substances, good flame retardant effect and other reliable chemical properties

1. Material difference: The raw material of latex is natural oak sap, which is formed by foaming to generate pores. Memory foam is also called slow rebound sponge. The raw material is extracted from petroleum, and it is mainly chemical synthesis. 2. Different lifespans: Latex will not deform for 15 years normally. After 2 to 5 years of memory foam, the position where you often sleep will not rebound. 3. Different rebound: Latex rebounds immediately, while memory foam rebounds slowly. 4. Different touch: Latex has the same good touch and close-fitting effect in all seasons. Memory foam is hard in winter and soft in summer. 5. Different functions: the oak protein of latex itself can inhibit the breeding of mites, and the memory foam has strong shock absorption ability, which is suitable for decorative materials, shock absorption materials and sound insulation materials. The memory pillow is made of slow rebound material. The so-called slow rebound means that when a certain pressure is applied to it, it will not be deformed immediately like sponge, but has a certain “memory” function. , can maintain the elastic deformation of 3-5S, maybe you can’t understand this characteristic, but if you understand the 6G pressure that the astronauts bear in the process of going up and down physically, you will understand the benefits of this material . The slow-rebound memory foam material also has a “memory” function, which is its temperature-sensing feature, which has a strong affinity for people and can quickly integrate with the human body. Using memory health care pillows will not feel any It also has a certain repairing effect on patients with cervical spondylosis. The natural latex pillow is a pillow made of pure natural materials, which does not cause any harm to the human body, and because of its unique natural material, it can effectively inhibit bacteria and mites, and has no side effects on the human body.

Filter sponge is a high-tech material. It is designed for astronauts to help relieve the stress astronauts experience during takeoff, landing and flight. Due to the pressure relief characteristics of filter sponges, filter sponges are widely used in many places. Let’s take a look at the unknown side of the filter sponge? Filter sponge is also called mesh sponge, blasting sponge. Polyurethane filter sponge is made of ordinary open-cell soft foam through reticulation treatment. The reticulation treatment removes the original mask or wall film between the foam networks and obtains the main skeleton network structure. The porosity of the filter sponge is as high as 97%, with air permeability, good softness and high mechanical strength. The difference between filter sponges and traditional sponges and liposuction: filter sponges can absorb the weight of the body and feel like floating in the air. The filter sponge follows the body type rather than the body type like sponge and polyester cotton, which can make people more adaptable to it. Full body, neck, and lumbar support can be provided by allowing the spine and joints to rest in their natural physiological state. Completely release stress and enjoy a weightless feeling. The material of the filter sponge is antibacterial according to European standards. Its high-density material can effectively resist the penetration of sweat and odor, which can ensure personal hygiene and is harmless to human health.