The main components of halogen-free flame retardant wood plastics usually include the following categories:
One is the resin matrix, and the common ones are polyolefins such as polyethylene (PE), polypropylene (PP), and polyvinyl chloride (PVC). From the perspective of "Tiangong Kaiwu", this resin matrix is like creating a "base material" for wood plastics, just like building a house needs to prepare a foundation stone, which determines the basic characteristics of wood plastics. For example, PE resin gives wood plastics good flexibility and water resistance, while PVC makes wood plastics have better hardness and chemical corrosion resistance.
The second is wood fibers, such as wood flour, bamboo flour, etc. These wood fibers are like the "bones" of wood plastics, adding their strength and rigidity, and reducing costs and improving the texture of products. Just as the materials recorded in "Tiangong Kaiwu" are cleverly matched, the wood fiber and the resin matrix are fused, so that wood-plastic has both the characteristics of wood and the advantages of plastic.
In addition, it is a halogen-free flame retardant, which is a key component. Common are phosphorus-based flame retardants, nitrogen-based flame retardants and inorganic flame retardants such as aluminum hydroxide, magnesium hydroxide, etc. Phosphorus-based flame retardants decompose by heat to form phosphoric acid, metaphosphoric acid, etc., which cover the surface of the material and isolate oxygen and heat transfer; nitrogen-based flame retardants are heated to produce non-flammable gases, which dilute the oxygen concentration; aluminum hydroxide and magnesium hydroxide decompose by heat and absorb heat, and generate water vapor to dilute flammable gases. At the same This is a wonderful method of halogen-free flame retardant, just like ancient fire prevention used water and moisture to block the spread of fire, ensuring that wood-plastic delayed combustion in case of fire.
In addition, there may also be capacitors, lubricants and other additives. Compatibilizers enhance the compatibility of wood fibers and resin matrices, making them mix more evenly, just like a matchmaker to make the two closely combined; lubricants reduce friction between materials during processing and ensure smooth processing, similar to ancient axles oiled to make smooth operation.

Ash-free refractory mud is suitable for a wide range of applications. In the smelting and casting industry, the construction and repair of blast furnaces, open furnaces, and electric furnaces rely on their heat resistance, corrosion resistance, and bonding properties to ensure the firmness of the furnace body, resistance to high temperature erosion, and smooth smelting.
In the kiln industry, ceramic kilns and glass kilns also need this mud. When the kiln is fired at high temperature, the ash-free refractory mud can seal the gap, prevent the escape of hot gas, maintain the temperature stability in the kiln, and ensure the quality of ceramic and glass products.
Furthermore, the construction of the boiler is also used. When the boiler is running, the internal high temperature and high pressure, ashless refractory mud can be lined with the inner wall, resist high temperature, heat insulation, not only to ensure the safety of the boiler, but also to increase energy efficiency.
In addition, in some high temperature experimental equipment, industrial chimneys and other facilities, ashless refractory mud is also indispensable. It can withstand high temperature, prevent heat conduction and loss, and ensure the normal operation of the device.
The reason why this mud is suitable for all kinds of materials is that it has excellent fire resistance, can withstand extremely high temperatures without melting; good adhesion, can make various refractory materials firmly bonded; good chemical stability, not easy to react with other substances, in high temperature and complex environments, it can still maintain good performance, so it plays a key role in the construction and maintenance of materials for many high temperature operations.

What standard can the flame retardant effect of halogen-free flame retardant magnesium rods meet? This is the key to the performance of the material. Today, I will analyze one or two for you with ancient words, similar to the style of "Tiangong Kaiwu".
Those who have halogen-free flame retardant magnesium rods, their flame retardant power is the first to suppress the spread of fire. When encountering an open fire attack, they must be able to quickly contain the spread of the fire and prevent the flames from running rampant. This is like building a dike to prevent floods, so that the raging of the fire cannot exceed the moment. Its effect should reach the point where the fire reaches the rod, the flame is suddenly weak, and it must not rise rapidly along the rod body, so that the spread path of the fire is blocked. If the river encounters a dam, the flow is slow and stable.
Furthermore, the amount of smoke is also an important consideration. When high-quality halogen-free flame retardant magnesium rods burn, the smoke emitted should be thin and thin. Thick smoke blinds the eyes, which not only damages people's vision, but also easily causes the risk of suffocation. Therefore, the halogen-free flame retardant magnesium rods must have very little smoke, just like light clouds and mist, so as not to diffuse the eyes, leaving a clear line of vision for those in danger, which is convenient for evacuation and escape.
As for toxicity, it is called halogen-free, which is non-toxic and harmless. During the combustion process, no harmful gases, such as halides and other highly toxic substances, should be released. This is a major issue related to life and safety. It must be like a clean flow of water, free of the slightest toxic stain. In the place where humans and animals are located, even in case of fire, it will not be poisoned by the burning of magnesium rods, ensuring the safety of one's life.
And its flame retardant durability cannot be ignored. It cannot only be slightly effective in the initial encounter with fire, and it will fail immediately. It should be like a tough shield, which can resist the attack of fire from beginning to end, and can still hold its responsibility when the fire is hot, and the flame retardant ability will not fade until the fire is extinguished. In this way, it can be said that the flame retardant effect of halogen-free flame retardant magnesium rods is up to the highest standard, and it can be a good material for fire prevention and disaster reduction.

In the process of processing ballastless track turnouts, there are many points to pay attention to.
First, the material selection must be strict. It is necessary to choose materials with solid texture and stable performance, which is the foundation for ensuring the quality of the turnout. As "Tiangong Kaiwu" said: "Where the casting mirror is cast, the mold is made of gray sand, and the copper is made of tin. This is the general idea." The same is true for the selection of turnout materials. It is necessary to carefully select suitable materials according to its use scenarios and performance requirements in order to ensure that it can withstand huge pressure and frequent shocks during train operation.
Second, the processing accuracy is crucial. The dimensional accuracy and shape accuracy of each component of the turnout need to be strictly controlled, and the deviation may affect the stability and safety of the train operation. Just like the manufacture of precision instruments in ancient books, the slightest difference is a thousand miles away. In turnout processing, the size must be accurate to the specified range, and the surface flatness must also meet the standard, so that the train can pass smoothly.
Third, the heat treatment process should not be underestimated. Proper heat treatment can improve the structure and properties of the material, improve the strength, hardness and wear resistance of the turnout. However, if it is not handled properly, it may cause the material to become brittle and reduce the service life. Just like the ancients forged swords, the heat was not accurate, and the sword was not superior.
Fourth, the processing process needs to be scientific and reasonable. From cutting, forging, machining to assembly, all links are closely interlocked, and any mistake in any link will affect the overall quality. According to the characteristics and technical requirements of the turnout, the processing technology should be formulated and improved, and the operation should be strictly in accordance with the process to ensure the orderly progress of the processing.
Fifth, the quality inspection is carried out throughout. Strict testing should be carried out at all stages of processing, and a variety of testing methods and tools should be used to ensure that the quality of the turnout meets the relevant standards and requirements. Those who fail the test must never flow into the next process or be delivered for use, just as in ancient times, excellent utensils were inspected layer by layer.

Flameless flame arresters have many advantages over traditional flame arresters.
First, flameless flame arresters are more excellent in flame resistance. Traditional flame arresters block the spread of flames through metal mesh or corrugated plates, which may encounter high-energy flames or rapid combustion conditions, or the risk of failure of the flame arrestor. Flameless flame arresters use advanced materials and exquisite designs to dissipate flame energy more efficiently, ensuring reliable fire resistance in extreme situations, greatly reducing the chance of explosion accidents.
Second, flameless flame arresters are much easier to install and maintain. Traditional flame arresters often require precise debugging during installation due to their complex structure, and maintenance also requires professional personnel and tools. The flameless flame arrester has a simple and compact structure, is easy to install, and has low requirements on installation space and conditions. And its maintenance cycle is long, the maintenance cost is low, and there is no need to replace parts frequently, saving the user a lot of trouble and cost.
Third, the flameless flame arrester has a wider range of applications. The traditional flame arrester has limited applicability in some special media or working conditions due to its own characteristics. The flameless flame arrester is specially designed and selected, which can not only be used in common gas and steam occasions, but also in dusty, humid and corrosive media environments. It can also operate stably, play a good role in flame resistance, and meet the needs of various industrial production.
Fourth, the flameless flame arrester has better safety performance. When the traditional flame arrester works or generates high temperature due to flame impact, there is a risk of causing fire from the surrounding combustibles. Flameless flame arrester can control the flame energy inside, prevent heat from being transmitted out, avoid such safety hazards, and create a safer environment for the production site.
In short, flameless flame arrester has shown significant advantages in many scenarios due to its excellent fire resistance efficiency, easy installation and maintenance, wide application range and good safety performance, and is gradually becoming an important equipment in the field of industrial fire protection and explosion prevention.