Fire retardant insulated steel drum Shanghai Xugong Coating Technology Co., Ltd. Xu Guoxing In movies or TV series, we can often see the explosion of steel drums with dangerous goods, sometimes when they are avoiding the steel drums with dangerous goods that will be blasted, it happened one or two seconds later. The consequences of catastrophic destruction. At this time, as a barrel worker, we thought that it would be great if there was a paint that could delay the steel barrel for a few seconds! As a packaging product, steel drums are widely used in applications, so the problem of fire retardant and heat insulation is gradually being taken seriously in the world. In the past few years, there have been fire-breathing and heat-insulating steel drums abroad. In fact, this steel drum is to change the exterior paint used to fire retardant heat-insulating coating. Coatings specifically for steel drums are now available in the country and have been successfully tested on steel drums. What is even more commendable is that, in order to adapt to domestic use, the price is close to the low level of baking lacquer used in our steel drums. Some people think that steel drums are not flammable, and it is not known that metal products are most likely to conduct heat and oxidize under flame and high temperature. This is a fatal risk factor when the contents of the steel drum are chemical or other dangerous items. The outer coatings commonly used in our steel drums are very flammable organic synthetic resin coatings, which enhances the heat transfer and oxidation rate of the steel drum itself under high temperature and flame, which increases the explosion. Danger. Although the outer coating of the steel drum is changed to fire retardant and heat-insulating coating, although the fire problem cannot be completely solved, at least the disaster can be delayed, and it is precious time to win the disaster relief work. Fire-retardant and fire-retardant heat-insulating coatings, as the name implies, are coatings that are inherently non-combustible and have fire retardant and heat-insulating functions. Although this kind of coating itself can not prevent the occurrence of fires and explosions, it can prevent the burning of the entanglement, reduce the temperature of combustion, and to some extent isolate the high temperature generated by the combustion, thus delaying the occurrence of disasters and explosions, Reduce the threat of fire. This coating is used for the outer coating of steel drums and has the effect of at least delaying or delaying the explosion time for the contents of inflammable and explosive materials. This has won valuable time for disaster relief and has created favorable conditions for reducing the damage caused by fire. In general, combustion must have three conditions: combustible materials: full contact with oxygen and a certain combustion temperature. Therefore, for the fire-retardant and heat-insulating thermal insulation coating, the coating film itself must have at least the property that the flame does not burn, and further requires that the coating film can block the entry of a large amount of oxygen, and the second can prevent The role of flame spread, three can play a role to isolate the high temperature generated by combustion. Nowadays, the general coatings are all organic. When exposed to high temperature combustion, the decomposed carbon and hydrogen combine with the oxygen in the air to produce a fierce exothermic reaction, which further promotes the burning. The coating film-forming resin used as a fire-retardant and heat-insulating heat-insulating coating often contains a compound or an element such as chlorine, bromine, nitrogen, phosphorus or the like which can extinguish the flame in its molecular chain. Among them, chlorine-containing synthetic resins are most commonly used, such as polyvinyl chloride, perchloroethylene, and chlorinated rubber. Of course, if a phenolic resin or an amino resin is used as a film-forming substance, the coating can be solidified into a coating film which is hard to spread and burn when it is heated. Recently developed self-extinguishing resin, the resin containing bromine, such as alkyd resin made of tetrabromophthalic anhydride, epoxy resin made of tetrabromobisphenol A, etc., such resin can be released at high temperature Hydrogen bromide extinguishes the flame. The fire retardant and heat-insulating coating for external use of steel drum is composed of expansion catalyst, carbonization agent, jet agent, resin binder, flame retardant additive, flame retardant pigment and heat insulation agent. The role of the expansion catalyst is mainly to promote and change the thermal decomposition process of the coating, promote the formation of a non-flammable three-dimensional carbon layer, reduce the amount of combustible tar, aldehyde and ketone produced by thermal decomposition, and promote the reaction of generating non-combustible gas. Generally, ammonium polyphosphate, magnesium ammonium phosphate and zinc borate are used. The function of the carbonizing agent is the material basis of the incombustible carbonaceous foam layer which is dehydrated to form a three-dimensional space under the combined action of the expanding catalyst and the jetting agent. Commonly used are pentaerythritol, dipentaerythritol, pentaerythritol carbamate, polyamide resin, and starch, dextrin, sugar, and the like. Jet is a kind of substance that ignites a non-combustible gas and blows up a carbonaceous layer to form a porous foam layer. Commonly used are melamine, chlorinated paraffin, hexamethylenetetramine, diammonium hydrogen phosphate, polyurethane, melamine formaldehyde resin, polyamide resin, azoformamide urea, hydroxymethylurea, dicyandiamide , glycine, casein, wood powder, etc. In addition to enhancing the properties of the coating, another role of the resin binder is to bond the porous foam layer to the substrate to separate the flame from the substrate. The function of the flame retardant additive is to increase the flame retardant ability. The compound used as the flame retardant additive generally contains halogen such as chlorine or bromine or inorganic elements such as phosphorus, nitrogen, strontium, barium, boron, aluminum and sulfur, and commonly used chlorinated wax. , haloalkyl phosphate, chlorinated rubber, halogenated phenol, and the like. Flame-retardant pigments are a class of inorganic compounds that are not inherently non-combustible and that are highly reflective to heat or conduct heat, such as titanium dioxide, mica, and chalk. The function of the heat insulating agent is to form a heat insulating material of a porous or glass-like thick film at a high temperature. If a substance such as silicic acid rash: sodium borate is added to the coating, the coating film can be melted to form an insulating glass layer when heated, and the flame is separated from the steel barrel material. However, if ammonium phosphate, starch, and silicone oil are added to the coating, the coating can not only emit a flame retardant inert gas at a high temperature, but also form a porous thick film of the coating film to form an insulation between the flame and the steel drum material. Defense layer. At present, the fire-retardant and heat-insulating coatings for steel drums produced in China are anti-corrosion and wear-resistant. It can not only be fire-retardant and heat-insulating, but also has the anti-corrosion and anti-wear properties of steel drums. Or in the case of strong heat, the crystallization water contained in the coating resin can be first released, and the crystallization water rapidly evaporates and releases the inert gas and halogen which can extinguish the flame, and the outer layer of the coating itself is foamed to form a porous body. The three-dimensional carbon layer protects the structure, while the inner layer of the coating melts into an adiabatic glass body. The performance of this coating is very similar to that of nitrocellulose lacquer, which is dried about ten minutes after spraying. General fire-retardant coating, Su; burning weight loss is less than 20 and the wooden board method can be self-extinguishing after two minutes of removal, and the fire resistance test of domestic fire-retardant coatings for steel drums is only the wood strip method 39 In seconds, the loss on combustion was 11% and it did not ignite from start to finish during the burn-in weight test. At present, fire-retardant and heat-insulating steel drums have not been officially mass-produced in China, but such steel drums are undoubtedly huge for fire safety. natural skincare product for men,30 years experience guangzhou cosmetics factory supply ,OEM/ODM service is welcomed . moisturizer for male,skincare set for men ,facial cleanser gel,face scrub Athena(Guangzhou) Cosmetics Manufacturer Co., Ltd , https://www.ydgzathenaskincare.com
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