Introduction: "Shanghai International Mortar Technology and Equipment Exhibition" as the earliest held in China, the most professional and industry influence and brand awareness of the mortar industry event, the Shanghai International Mortar Exhibition has long enjoyed a good reputation in the mortar industry. It is also the only international event in the mortar industry with the support and participation of the most industry-renowned companies.
"Shanghai International Mortar Technology and Equipment Exhibition" as the earliest held in China, the most professional and industry influence and brand awareness of the mortar industry event, Shanghai International Mortar Exhibition has long enjoyed a good reputation in the mortar industry. It is also the only international event in the mortar industry with the support and participation of the most industry-renowned companies.
Zhengzhou Chaofan Automatic Control Valve Co., Ltd. actively participated in each event, and this time my company's booth number E6 H27. In the three days of the show, the booth of the extraordinary valve attracted great attention from domestic and foreign merchants. Among them, the products such as pneumatic aluminum butterfly valves have become a highlight of this exhibition.
In the three days of the show, the booth of the extraordinary valve attracted great attention from domestic and foreign merchants. Among them, the products such as pneumatic aluminum butterfly valves have become a highlight of this exhibition. Many customers have conducted detailed consultations on the spot and hope to cooperate in depth through this opportunity. In this exhibition, we reached a cooperation agreement or intention with many customers, and also made friendly exchanges with our peers through this exhibition and made many new friends. The extraordinary valve through this exhibition also learned the latest market of the valve industry, opened up the international vision, which will bring new opportunities for the extraordinary development of the valve in the future.
The current multi-polarization of the world is developing in depth, emerging-market countries and developing country groups are rising, and China is increasingly entering the center of the world stage. Scientific and technological innovation is a strategic support to improve social productivity and overall national strength. The field of fluid control also urgently requires energy-saving innovation. From the rapid extension of high-speed rail, aircraft carrier launches, to the Beidou network, Tianyan, quantum communications, artificial "sun" ... ... a dazzling "business card", witnessed the pace of technological innovation. The important basic industry in the manufacturing industry - the valve industry has developed rapidly in recent years and has broad prospects, and its technological innovation is particularly important. In front of the booth, foreign customers were constantly attracted to our company's products for consultation. Whether it is the Mainland or Hong Kong, people are very concerned about good products. Foreign customers were also attracted and our translators went forward to explain. In this exhibition, our company has greatly improved in terms of scale, types of exhibits, and staffing. It has played a very good role in promoting the company’s brand “Extraordinary†and “Zheng Chaoâ€, allowing our company to be in fluid. The control area has further enhanced its visibility. This is inseparable from the efforts of all employees of the company.
At present, the five most commonly used Thermosetting Plastics in various fields are PU, epoxy resin (EP), silicone, unsaturated polyester (UP) and phenolic resin (PF).
Thermosetting Plastic has the following advantages:
Thermosetting plastic has a large rigidity and is extremely elastic and plastic deformation.The temperature has little influence on stiffness, and under the same load and temperature, the creep variable is much smaller than thermoplastic.Good heat resistance;The plastic parts are quite stable when heated.The size of the plastic parts is good. Thermosetting plastic is less affected by temperature and humidity, and Thermosetting plastic can be reduced after forming, making Thermosetting plastic easy to make plastic parts with high precision than thermoplastic ruler.Excellent electrical performance.Resistance to arc and voltage, etc.Good corrosion resistance, weak acid, weak base and organic solvents;Good processability, can be processed by various molding methods and other advantages.
Most thermosetting plastics have the following characteristics:
(1) excellent chemical resistance.
(2) it is usually brittle hard plastic, which can be filled with various fillers to form composite materials.
(3) compared with thermoplastic resin, the molding cycle is longer.
(4) all kinds of modification can be carried out, depending on the combination of resin, crosslinking agent, additive, etc., which can form composite materials with different properties.
(5) good heat resistance, the use of high temperature, Tg of thermosetting polyimide (PI) is about 350 ℃.
(6) can be used as raw materials to meet the application of various fields.Only 5% is used as injection molding material.
(7) the waste is generally used as filler after pulverization, which is difficult to recycle and pollutes the environment.
Due to the high heat resistance of thermosetting plastic, good dimensional stability, good line performance, anti-aging properties are better than thermoplastic plastic and low price, so it is widely used.The disadvantage is that the mechanical properties are poor and need to be enhanced.
It is mainly composed of thermosetting resins, which are involved in various necessary additives to form the plastic of the products.In the process of manufacturing or forming, the liquid will be liquid, which will not melt after curing or melt or soften again.Common thermosetting plastics include phenolic plastic, epoxy plastic, amino plastic, unsaturated polyester, alkyd plastics, etc.Thermosetting plastic and thermoplastic plastics constitute two major components of synthetic plastic.
Thermosetting plastic heating for the first time can soften the flow, heated to a certain temperature, react a crosslinking reaction and curing hardens, this change is irreversible, since then, heating again, already no longer soft flow.It is the use of this characteristic to make the molding process, using the plasticization flow of the initial heating, filling the cavity under pressure, and solidifying to become the product that determines the shape and size.
Thermosetting plastic is distinguished by a chemical reaction that is hardened by heating, pressing or adding the hardener at a definite temperature.After hardening, plastic chemical structure changes, the texture is hard, dissolves in the solvent, heating also no longer softens, if the temperature is too high then decompose.In thermoplastic plastic, the chains of resin molecules are linear or branched, and there is not any chemical bond between the molecular chains, which soften the flow when heated.The process of cooling and hardening is a physical change.
Formaldehyde cross linked plastic includes phenolic plastic, amino plastic (such as urea-formaldehyde - melamine - formaldehyde, etc.).Other cross linked types of plastic include unsaturated polyester, epoxy resin, prevalence, diallyl ester resin, etc.
The commonly used thermosetting plastics are phenolic resin, urea-formaldehyde resin, melamine resin, unsaturated polyester resin, epoxy resin, silicone resin, polyurethane, etc.
Production:Phenolic resin PF (Bakelite sheet)
Phenolic resin is a part of the longest plastic varieties in history, commonly known as bakelite or electric wood, and the appearance is yellowish or black, which is the typical representative of thermosetting plastic.Bakelite sheet molding often use a variety of filling materials, according to different filling materials used, the product performance is also different, Bakelite sheet as molding material, mainly used in the field of need heat resistance, but also as a bonding agent used in plywood, grinding wheel and the brake pads.
Thermosetting Plastics
Thermosetting Plastic,Thermoset Molding Plastic,Mould Thermosetting Plastic,Thermoplastic Type Plastic
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