The working principle of electromagnetic heater is: 220V or 380V alternating current, rectified into direct current, and then filtered direct current. IGBT or thyristor is used to turn DC into AC to generate high-frequency magnetic field lines in the induction coil. Eddy currents are generated on...
Quartz tube heating systems are widely used in various far-infrared heating devices. Due to the difficulty of design calculation, the application of quartz tube heating system is limited, the key is to choose the right quartz tube.
Quartz tube is a special industrial technology glass made of sili...
Electromagnetic heater is the most widely used heating method in industrial and civil fields today. Using electromagnetic heating technology, electromagnetic induction heating technology is referred to as IH (Induction Heating) technology, which is developed on the basis of Faraday’s induct...
Ceramic heater is a kind of high-efficiency heat division uniform heater, excellent thermal conductivity of metal alloy, to ensure uniform hot surface temperature, eliminate hot spots and cold spots of the equipment.
There are two types of ceramic heaters, which are PTC ceramic heating element an...
Cast aluminum electric heater is a kind of electric heater. Electric heater varieties include: cast aluminum heater, cast iron heater, quartz tube heater, stainless steel electric heating tube, No. 10 steel heating tube, heating tube with winding heat sink, VC443, VC442, VC441, VC432 induction he...
1. Color
In general, machine straps are brighter in color than hand straps. Usually, customers can judge by color. The more transparent the color, the purer the raw materials used in the strapping belt, and the better the gloss of the strap. Customers can also distinguish whether it is hand or m...
The previous article introduced the common types of nylon brush filament. In this article, other types of artificial brushes are to be introduced that are used in large quantities.
PP: The biggest feature of PP is that the density is less than 1, and several of them can be placed in water when te...
There are many kinds of brush materials. In early time, people mainly use natural wool. The so-called natural wool are non-synthetic materials that are collected and used directly, such as pig bristles, wool and other. Artificial fiber like PA, PP, PBT, PET, PVC and other plastic filament have th...
(1) Develop and develop fibers with better performance, strengthen the adhesion between the fiber and the matrix, improve the elastic modulus and anti-aging performance of the fiber, improve the dispersion of the fiber in the matrix, and prevent the deterioration of the performance of the fiber i...
2.2 Nylon fiber concrete
Nylon fiber concrete is one of the earliest polymer fibers used in cement and concrete, the price is relatively high, and the application is limited. The incorporation of nylon fiber can significantly reduce the dry shrinkage value of concrete, but the flexural, compressi...
2.1Polypropylene fiber concrete
From the research situation in recent years, it can be seen that polypropylene fiber reinforced concrete is the most widely studied fiber reinforced concrete material. Research at home and abroad focuses on the physical and mechanical properties of fiber concrete,...
1.3 Improvement of impact resistance to concrete
Impact resistance refers to the ability to resist the damage caused by the impact of an object when it is impacted. After organic fibers are incorporated into concrete, the compressive strength and flexural strength of concrete are increased to var...