PVC board, imported gray PVC board, high temperature and acid resistant PVC board

The true color is yellowish, translucent, and shiny. The transparency is better than polyethylene and polypropylene, but worse than polystyrene. Depending on the amount of additives, it is divided into soft and hard polyvinyl chloride. Soft products are soft and tough, and feel sticky. Hard products have a higher hardness than low-density polyethylene, while low-density polyethylene For polypropylene, whitening will occur at the bends. Common products: sheets, pipes, shoe soles, toys, doors, windows, wire covers, stationery packaging boxes, etc.
Polyvinyl chloride is a polymer material that uses a chlorine atom to replace a hydrogen atom in polyethylene. The structure of this material is as follows: [ ― ―― ]. Carbon atoms are arranged in a zigzag pattern, and all atoms are connected by bonds. All carbon atoms are hybridized, environmentally friendly and low-consumption plastic pipes, and the formula design of plastic pipes is based on certain principles.
The macromolecular structure of polyvinyl chloride has shortcomings such as poor heat deformation resistance and poor aging resistance due to unstable structures such as head-to-head branched double bond allyl chloride tertiary chloride. After pretending to be cross-linked, such shortcomings can be eliminated.
Cross-linking is divided into radiation cross-linking and chemical cross-linking.
Radiation cross-linking. High-energy rays are used, generally rays produced by cobalt radiation sources and electron rays produced by electron acceleration, mainly the latter. Then add cross-linking assistants (monomers with two or more carbon-carbon double bond structures) for cross-linking. However, it is difficult to operate and requires high equipment.
Chemical cross-linking. Use triazole dimercaptoamine salt for cross-linking. The cross-linking mechanism is that the amine combines with the mercapto group to attack the carbon-chlorine polar bond to perform a substitution reaction. After cross-linking, the product is UV-resistant, solvent-resistant, temperature-resistant, and impact-resistant. Toughening and other aspects have been comprehensively improved. And it is to solve the equipment difficulty problem of radiation cross-linking. The properties of toughening, weather resistance, temperature resistance, UV resistance, etc. have been greatly improved.
Easy the degradation caused by radiation cross-linking or peroxide cross-linking, and overcome the defect of serious discoloration. Obtain products with better appearance and performance.
The process is simple and suitable for molding, coating, rotational molding and other processes.
The material is polyvinyl chloride, which is a widely used material and is often used in our lives. Such as pipes, floors, wallpapers, etc. The demand in the Indian market is increasing year by year, and India will continue to rely on imported supplements in the future. Classification of polyvinyl chloride
Depending on the production method, it can be divided into: general-purpose resin, high polymerization resin, cross-linked resin. General-purpose resin is a high-polymerization resin formed by polymerizing vinyl chloride monomer under the action of an initiator. It refers to a resin polymerized by adding a chain extender to the vinyl chloride monomer polymerization system. Cross-linked resin is polymerized in vinyl chloride monomer. Resin polymerized by adding cross-linking agents containing dienes and polyenes to the polymerization system.
According to the method of obtaining vinyl chloride monomer, it can be divided into calcium carbide method, ethylene method and imported monomer method (it is customary to refer to ethylene method and imported monomer method as ethylene method).
According to the polymerization method, polyvinyl chloride can be divided into four major categories: suspension method PVC emulsion method PVC bulk method PVC solution method PVC. Suspension polyvinyl chloride is the variety with the largest output, accounting for about % of the total output. The chart below lists the basic properties of these four types of PVC.
Chart: Polyvinyl chloride resin
Characteristics: Does not contain metal ions, has good electrical insulation and thermal stability.

Suspension polyvinyl chloride is divided into six models according to absolute viscosity:. The meaning of each letter in the model: suspension method loose type tight type The following chart shows the characteristics of domestic suspension method PVC. The naming of polyvinyl chloride