Faq
The environmental problems of plastics are mainly related to the treatment and recycling of waste plastics. By strengthening the classification, recycling and reuse of plastics and developing degradable plastics, “white pollution” can be effectively controlled and reduced.
Masterbatches are commonly used in the plastics and twin-screw extrusion equipment industries. The use of masterbatches can simplify the color matching process and improve the efficiency and accuracy of color matching. At the same time, the pigment migration phenomenon of masterbatches is normal during the storage process and does not affect the quality of products.
Plastics are used in a wide variety of applications, including agriculture, light industry, textiles, electronics and electrical appliances, machinery, building materials, packaging and transportation. General-purpose plastics have been widely used in daily necessities, medical and instruments, electrical appliances and so on.
Common additives for plastics include plasticizers, lubricants, stabilizers, colorants, and fillers. These additives can improve the processing or use properties of plastics, and are sometimes used simply as incremental agents to reduce manufacturing costs.
The downstream of the plastics industry is the light industry with plastic products as its main business, covering sub-industries such as agricultural films, building materials, home appliances, auto parts, molds, containers and packaging.
The midstream of the plastics industry chain is the distributors at all levels, which can be categorized into three levels: primary distributors (general contractors), secondary distributors (speculators who take advantage of information asymmetry), and tertiary distributors (sub-terminals who take care of logistics, billing, and “white gloves”).
The upstream raw material of plastics is the synthesis of primary chemical products such as ethylene, acetylene or propylene, butadiene, benzene and other primary chemical products through the technical routes of naphtha and steam cracking of coal, charcoal coking to make methane gas, and coal to make methanol, and the catalytic polymerization to generate polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), and acrylonitrile-butadiene (ABS) and other plastic products.
The classification of plastics is very complex, according to the use can be divided into general-purpose plastics, engineering plastics, special plastics three types; according to the physical and chemical properties can be divided into thermosetting plastics, thermoplastic plastics two types; according to the molding method can be divided into molding, laminating, injecting, blow molding, extruding, casting plastics and reactive injection of plastics and so on a variety of types.
The main component of plastic is resin, which accounts for about 40% to 100% of the total weight of plastic. The basic properties of plastics are mainly determined by the nature of the resin, but additives also play an important role.
Plastics are polymer compounds made from monomers that are polymerized by polymerization or condensation reactions. Their resistance to deformation is medium, between fiber and rubber. Plastics are mainly composed of resins and additives such as fillers, plasticizers, stabilizers, lubricants, and colorants.
