0/1-10/8 is the day when the Chinese traditional festival Mid-Autumn Festival and National Day are coming. Our company will be closed on 10/1 and work on 10/9. But you can rest assured that we are on duty 7*24 hours. As long as you are interested in our products, you can directly inquire, and we will quote you as quickly as possible.                                                                                                                      

PVC: polyvinyl chloride It is a polymer material that uses a chlorine atom to replace a hydrogen atom in polyethylene. The biggest feature of PVC is flame retardant, so it is widely used in fire protection applications. But PVC will release hydrochloric acid and other toxic gases during the combustion process. Structural formula: -CH2-CHC1-CH2-CHC1-CH2-CHC1- POM: Polyoxymethylene The scientific name is polyoxymethylene, which is a thermoplastic polymer. The English abbreviation is POM. The structural formula is CH-O. Before 1942, most of the polyoxymethylene glycol HOCHOH obtained by the polymerization of formaldehyde was the polyoxymethylene glycol HOCHOH, which has a low degree of polymerization and is easy to be depolymerized by heat. It is polyoxymethylene. Around 1955, DuPont of the United States polymerized formaldehyde to obtain a homopolymer of formaldehyde, namely homopolyoxymethylene, with the trade name Delrin. Celanese Corporation of the United States started from trioxane and prepared a copolymer with a small amount of dioxane or ethylene oxide, that is, polyoxymethylene copolymer, with the trade name Celcon.

PET: Polyethylene terephthalate        A polymer of terephthalic acid and ethylene glycol. The English abbreviation is PET, which is mainly used to make polyethylene terephthalate fiber and the Chinese trade name is polyester. This kind of fiber has high strength and good fabric wearing performance. It is currently the highest output variety among synthetic fibers. In 1980, the world output was about 5.1 million tons, accounting for 49% of the world's total synthetic fiber output.        The high symmetry of molecular structure and the rigidity of the p-phenylene chain make this polymer have the characteristics of high crystallinity, high melting temperature and insoluble in general organic solvents. The melting temperature is 257~265℃; its density varies with The degree of crystallinity increases. The density of the non-standard state is 1.33 g/cm^3. After stretching, the density of the fiber is 1.38~1.41 g/cm^3. It is calculated from the X-ray study to complete The density of the resultant body is 1.463 g/lim^3. The glass transition temperature of non-standard polymer is 67℃; crystalline polymer is 81℃. The heat of fusion of the polymer is 113~122 J/g, the specific heat capacity is 1.1~1.4 J/g·K, the dielectric constant is 3.0~3.8, and the specific resistance is 10^1110^14 ohm·cm. PET is insoluble in common solvents, but only soluble in some more corrosive organic solvents such as mixed solvents of phenol, o-chlorophenol, m-cresol, and trifluoroacetic acid. PET fiber is stable to weak acids and weak bases.        Mainly used as raw material for synthetic fiber. The short fiber can be blended with cotton, wool, and wool to make textiles for clothing or upholstery cloth; the filament can be used for clothing or industrial silk, such as filter cloth, tire cord, parachute, conveyor belt, safety Belt and so on. The film can be used as a base for photosensitive film and audio tape. Injection molded parts can be used as packaging containers. 

ABS: It is a synthetic plastic containing acrylonitrile, butadiene and ethylene. The graft copolymer products of acrylonitrile, butadiene and styrene are named after the first letter of their English names. It is a resin with high strength, good toughness, and excellent comprehensive properties. It has a wide range of uses and is often used as an engineering plastic. In industry, polybutadiene latex or styrene butadiene rubber with low styrene content is the main chain, and it is made by graft copolymerization with a mixture of acrylonitrile and styrene. In fact, it is often a mixture of butadiene-containing graft polymer and acrylonitrile-styrene copolymer SAN or AS. In recent years, two monomers, styrene and acrylonitrile, are copolymerized first, and then mixed with graft copolymerized ABS resin in different proportions to prepare various ABS resins suitable for different purposes. Industrial production in the United States began in the mid-1950s. Industrial production methods can be divided into two categories: one is to mechanically blend polybutadiene or styrene butadiene rubber and SAN resin on a roller, or to blend two latexes and then copolymerize; the other is to polymerize Butadiene or styrene butadiene latex with low content of styrene is added with styrene and acrylonitrile monomers for emulsion graft copolymerization, or mixed with SAN resin in different proportions. Structure, properties and application In ABS resin, the rubber particles are in the dispersed phase and dispersed in the continuous phase of SAN resin. When impacted, the cross-linked rubber particles bear and absorb this energy, dispersing the stress, preventing cracks from developing, thereby improving the tear resistance. The purpose of graft copolymerization is to improve the compatibility and adhesion of the rubber particle surface with the resin phase. This is related to the amount of free SAN resin and the composition of the SAN resin grafted on the rubber backbone. The difference between the content of acrylonitrile in the two resins should not be too large, otherwise the compatibility will be poor and it will cause cracks at the rubber-resin interface. ABS resin can be processed into plastic by molding methods such as injection molding, extrusion, vacuum, blow molding, and mixing, and secondary processing can also be performed by mechanical, bonding, coating, and vacuum evaporation methods. Because of its excellent comprehensive performance and a wide range of uses, it is mainly used as engineering materials and can also be used for household appliances. Because of its good oil resistance, acid, alkali, salt and chemical reagent resistance, and its ability to be electroplated, it has the advantages of good gloss, light specific gravity and low price after plating the metal layer. It can be used to replace certain metals. It can also be synthesized into many varieties such as self-extinguishing type and heat-resistant type to adapt to various purposes.

The difference between ABS, PE, PP, PVC plastic materials PET polyethylene terephthalate. PE is polyethylene. PVC is polyvinyl chloride. PP is polypropylene. ABS is a copolymer of acrylonitrile, butadiene and ethylene. PEP is a copolymer of polyethylene glycol (PEG) and propylene oxide (PO). ①Polyvinyl chloride (PVC) is the most used plastic in construction. The density of rigid polyvinyl chloride is 1.38~1.43g/cm3, with high mechanical strength and good chemical stability. ②Polyethylene (PE) ③Polypropylene (PP) The density of polypropylene is the smallest among all plastics, about 0.90 about. Polypropylene is commonly used to produce construction products such as pipes and sanitary ware. ④ Polyvinyl (PS) polystyrene is a colorless, transparent, glass-like plastic. ⑤ABS plastic ABS plastic is a modified polystyrene plastic composed of three components based on acrylonitrile (A), butadiene (B) and styrene (S). PS: Polystyrene It is a colorless and transparent plastic material. It has a glass transition temperature higher than 100 degrees Celsius, so it is often used to make various disposable containers that need to withstand the temperature of boiling water, and disposable foam lunch boxes. PP: Polypropylene It is a semi-finished thermoplastic. It has high impact resistance, strong mechanical properties, resistance to a variety of organic solvents and acid and alkali corrosion. It has a wide range of applications in the industry and is one of the common polymer materials. Australian coins are also made of polypropylene. PE: Polyethylene It is one of the most commonly used polymer materials in daily life, and it is widely used in the manufacture of plastic bags, plastic films, and milk barrels. Polyethylene is resistant to a variety of organic solvents and acid and alkali corrosion, but it is not resistant to oxidizing acids, such as nitric acid. Polyethylene will be oxidized in an oxidizing environment. Polyethylene can be considered transparent in the film state, but when it exists in the form of lumps, due to the large number of crystals inside, it will undergo strong light scattering and become opaque. The degree of polyethylene knotting is affected by the number of branches. The more branches, the more difficult it is to knot the product. The melting temperature of polyethylene crystals is also affected by the number of branch chains, which are distributed from 90 degrees Celsius to 130 degrees Celsius. The more branch chains, the lower the melting temperature. Single polyethylene products can usually be prepared by dissolving high-density polyethylene in xylene in an environment above 130 degrees Celsius. Structural formula: -CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH2-

Plastic is a polymer compound (macromolecules) that is polymerized by addition polymerization or polycondensation reaction with monomer as raw material. Its resistance to deformation is moderate. It is between fiber and rubber. It is composed of synthetic resin and filler, plasticizer, and stabilizer. It is composed of additives such as agents, lubricants, and pigments. The main component of plastic is resin. Resin refers to a polymer compound that has not been mixed with various additives. The term resin was originally named for the lipids secreted by plants and animals, such as rosin and shellac. The resin accounts for about 40% to 100% of the total weight of the plastic. The basic properties of plastics are mainly determined by the nature of the resin, but additives also play an important role. Some plastics are basically composed of synthetic resins, with no or little additives, such as plexiglass and polystyrene. Plastics can be roughly divided into the following categories: Polyethylene--PE Polypropylene--PP High Density Polyethylene--HDPE Low Density Polyethylene--LDPE Linear Low Density Polyethylene--LLDPE Polyvinyl Chloride--PVC General Purpose Polystyrene--GPPS Expansible Polystyrene--EPS High lmpact Polystyrene--HIPS styrene-Acrylonitrile Copolymers--AS,SAN Acrylonitrile-Butadiene-styrene Copolymers--ABS Polymethyl Methacrylate--PMMA Ethylene-Vinyl AcetateCopolymers--EVA Polyethylene Terephthalate--PET Polybutylene Terephthalate--PBT Polyamide(Nylon 6.66)--PA Polycarbonates--PC Polyacetal--POM Polyphenyleneoxide--PPO Polyphenylenesulfide--PPS Polyurethanes--PU Polystyrene--PS

Dragon Boat Festival Holiday notice for the Dragon Boat Festival, No. 25-27, but please rest assured that as long as you come to the inquiry, we will do it in seconds and we will never take a quotation.

This is the 100000pcs disposable non woven face mask ordered by Canada customers, all shipped today. 50pcs a box 2000pcs a carton