Chinese dried Reuters recently, China Chemical Industry Guilin Engineering Co., Ltd. invention patent four composite rubber extruder head of Guangxi won the first patent inventions achievement trade fair project gold medal. The main performance and technical indicators of this equipment have reached the international advanced level.
The compound rubber extruder is the key process equipment for tire production. It is composed of 4 sets of pin barrel cold feed extruders. The 4 different formulas are heated and plasticized by an extruder and then delivered to the compound head. Extrusion allows accurate control of extrusion product temperature, dimensional accuracy and extrusion speed to meet a variety of production process requirements. In addition, the machine-external laminating and out-of-machine compounding technology of the original tire production can be converted into a variety of in-machine composites. This is of great importance to improving the quality of tires, increasing productivity, and reducing energy and raw material consumption.
In the production of sealant tapes, the three composite heads and four composite heads have also developed rapidly. In China, the compound head of the sealant strip production line that was introduced earlier is mostly equipped with a shear head. The structure of the head is relatively complex. After years of development, the three-composite and four-compound heads used today are quite simple and have good results. The shear head is no longer used. With the development of home-made composite extrusion equipment, compound extrusion technology and production technology will emerge a relatively rapid development. The localization of advanced equipment is conducive to new types of equipment and technology, improving the level of enterprise equipment and promoting production development, especially due to the rapid development of radial tire production in China and the advantages of pin-type cold-feed extruders in recent years. The application of the cold feed extruder has greater advantages, becoming a new generation of hot feed extruders and ordinary cold feed extruders, providing broad development and application prospects for pin-type cold feed extruders. .
Curing agents, also known as hardeners, are essential components of many polymer systems, including Epoxy Resins. Curing agents react with the epoxy resin to form a three-dimensional crosslinked network, resulting in a cured polymer with improved mechanical properties, chemical resistance, and thermal stability.
There are several types of curing agents, each with its own unique properties and applications. The most common type is amine-based curing agents, which react with the epoxy functional group to form a secondary amine and an alcohol. This reaction is exothermic and can be accelerated by heat, making it ideal for high-temperature applications.
Another type of curing agent is anhydride-based, which react with the epoxy group to form a cyclic acid anhydride and a hydroxyl group. These curing agents are typically used in applications where water resistance is critical, such as marine coatings and adhesives.
Other types of curing agents include phenolic, acid, and catalytic curing agents. Phenolic curing agents are used in high-temperature applications, while acid curing agents are used in low-temperature applications. Catalytic curing agents are used to accelerate the curing process and are typically used in combination with other curing agents.
The choice of curing agent depends on the specific application requirements, such as cure time, cure temperature, and final properties of the cured polymer. It is important to choose the correct curing agent to ensure that the final product meets the desired specifications.
In summary, curing agents are essential components of many polymer systems, including epoxy resins, and play a critical role in improving the mechanical, chemical, and thermal properties of the cured polymer. The choice of curing agent depends on the specific application requirements and must be carefully considered to ensure the final product meets the desired specifications.
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