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.
BS-Polyurethane sponge filler
Polyurethane bio-sponge filler is made by double blasting of oxygen and hydrogen, and the pores are uniform and interconnected, so as to achieve an all-round bacterial culture carrier of the whole bio-sponge filler.
Polyurethane sponge biological filler, its porous and transparent structure greatly increases the specific surface area of the product, which is conducive to the mass reproduction of cultured bacteria, large hanging modulus, and short time. It is an efficient filler product. As a sewage treatment filler, it has been recognized and recommended by the majority of scientific research units.
Polyurethane bio-sponge filler is suitable for high-concentration organic wastewater, various industrial wastewater, oil refining wastewater, daily chemical wastewater, pharmaceutical wastewater and urban domestic sewage for denitrification and phosphorus removal and other sewage treatment projects.
BS-Hydrophilic gel filler
Moving Bed Biomagic MBBR Craft
By adding a certain amount of suspended filler to the gas explosion tank, a large number of microorganisms are attached to the suspended filler to form a biofilm. When the sewage flows through, the organic matter in the sewage acts as a nutrient and is taken up by the microorganisms on the biofilm. At the same time that it grows and reproduces itself, the sewage is purified, which increases the biomass and biological species in the aeration tank, thereby improving the sewage treatment efficiency of the aeration tank.
Suspended filler is the core part of the MBBR process, and its performance directly affects the attachment of microorganisms, thereby affecting the effect of biofilm treatment of sewage. When choosing a suspension filler, the following three points are particularly important:
Hydrophilic performance: determines whether microorganisms can more easily attach to the filler, whether they can quickly deal with sewage treatment,
Specific surface area: The larger the specific surface area, the more the amount of microorganisms attached, the higher the sewage treatment efficiency.
Porous ventilation: The inside of the packing can also maintain sufficient oxygen supply, and it is not easy to block.
Environmentally friendly sponge is made of many chemical substances polymerized. Its main chemical component is polyurethane, which is a kind of polymer material, so it will produce a lot of irritating gas during chemical reaction, which is a toxic substance.
Environmentally friendly sponges require that there is no such toxic substances in the sponges, and they can be decomposed. This kind of environmentally friendly sponges is mainly used for cleaning and bathing. The main component is composed of wood pulp fibers, which can absorb water and decompose naturally. Yes, it can fully comply with the EU rosh environmental certification and the US UL certification.
Environmentally friendly sponges are different from ordinary sponges in terms of composition.
Polyester sponge has mechanical strength and unique oil and solvent resistance properties. Fine and even hand feel, strong tensile force, oil resistance and anti-aging. In terms of wear resistance, abrasion resistance, high temperature resistance, strong stretchability, good elasticity, and no bad smell, it is widely used in high-end vehicle interiors, motorcycles, buildings, automobiles and air conditioner filters, train oil pillows, and aircraft fuel tanks. Fillers, motorcycle clothing, safety clothing, professional audio equipment, stationery printing pads, gas masks, packaging buffer materials, cleaning and scrubbing supplies, etc.
The main features of polyester oil absorbing sponge are:
(1) There are two categories of polyester open-cell and polyester non-porous, mainly used for car paint polishing and waxing care, such as: car polishing and waxing sponge.
(2) It has the characteristics of good elasticity, moderate hardness, good oil absorption, and acid and alkali resistance, such as ink pad sponge.
(3) It has the properties of oil resistance, water resistance, corrosion resistance, high temperature resistance and strong stretchability, such as: printer ink cartridge sponge, mainly used for printer consumables. After processing by special technology, it can also be made into printer accessories such as ribbon wheel, ink wheel, toner cartridge, sealing sponge and so on.
(4) This product is a polyester mesh sponge made of special technology. It not only has the advantages of general mesh sponge, but also has the advantages of small color change, high porosity, good air permeability, water resistance, oil resistance and aging resistance. , High compressive strength characteristics. Widely used in air conditioning filter layer and vehicle air filter, aquarium and other filter sponges, the performance is much better than the original filter products, and can be cleaned and used repeatedly.