What are the plastic products What are the plastic products?
Plastic products are very diverse, and there are many ways to categorize them. 1, according to the molding method and product structure can be divided into compression molding products, transfer molding products, thermoplastic foam structure products, blow molding products, thermoforming products, non-waste molding products, rotational molding products, forging molding products, extrusion molding products, reinforced and laminated products. 2, according to different raw materials can be divided into polyethylene, polypropylene, polyvinyl chloride, phenolic resins and amino plastic products. 3, according to the product geometry and use can be divided into plastic pipe, plastic film, plastic plates and sheets, plastic wire, plastic tape. Plastic bags, artificial leather, plastic building materials, foam, plastic containers, plastic shoes, wires, cables, plastic industrial parts, daily-use plastic products, arts and crafts plastic products and plastic products for education and sports. Plastic pipe has polyethylene plastic pipe (also divided into ordinary pipe, gas pipe, agricultural dark pipe, composite pipe, calcium plastic pipe, LLDPE pipe), polypropylene pipe (also divided into ordinary pipe, water supply hard PVC pipe, PVC calcium plastic pipe, ordinary soft PVC pipe, textile-reinforced PVC water hose or known as the Vi-Plastic Pipe, PVC clamped mesh pipe, corrugated pipe, low-foam PVC pipe, twisted pipe, spring pipe and anti-static pipe), other Thermoplastic pipe and thermosetting plastic pipe and so on. Plastic films include PE film (general, heavy packaging, greenhouses, ground cover, heat shrink packaging, non-slip, cast flat film, air cushion film, LLDPE blow molded ultra-thin film, calendering film, etc.), PP film (blow molded packaging, extrusion casting, bi-directional stretch film), PVC film, and other plastic films, plastic sheets and plates include PE, PP, PVC sheets and plates, other thermoplastic plates and sheets, and thermosetting plastic plates and sheets, and other thermoplastic plates and sheets, and thermosetting plastic pipes. and sheets, thermosetting plastic sheets, and so on. Artificial leather (e.g. PVC artificial leather and foam artificial leather by direct scraping method, artificial leather by indirect scraping method, artificial leather by calendering and extruding method, artificial leather by circular mesh coating method) and other artificial leather (dry and wet PU, PU/PVC composite, PE, PA artificial leather, rubber-plastic-nylon canvas leather). Plastic filaments. Nets, tapes, bags (PE, PVC, PA, PP monofilament, PP flat filament, PVC hairline, PP, PVC baling and strapping ropes, PVC transportation and insulating tapes), plastic extruded nets and PE extruded foamed nets, plastic steaming bags, self-sealing tapes, PE, PP bags, HDPE, LDPE purchase bags, plastic cement bags. Plastic containers, hollow containers such as blow-molded drums, extrusion and injection blow-molded bottles, extrusion-stretch blow-molded bottles, injection-stretch blow-molded bottles, extrusion-blow-molded large hollow containers, rotationally-molded containers, composite hollow containers, plastic turnover crates, corrugated crates, and clothing boxes. Plastic shoes and soles: PVC all-plastic sandals, rain shoes, miner's shoes, injection molded foam sandals, plastic sole imitation grass shoes, foam slippers, PVC soles, etc. and other plastic shoes (PE foam sole sandals, slippers, cloth shoes; PU foam sole sandals, slippers, leather shoes; SBS sole travel, sandals, cloth shoes). Foam and its products, soft such as: PE rolls and seat cushions, PVC soft, PU soft and its composite materials; rigid PE life jackets, swimming rings, PS, PU and PU thermal insulation casing. 4, a variety of building materials, such as: calendered PVC floor leather, extruded calendered PVC floor leather, coated and scraped PVC floor leather, round net coated PVC floor leather, roller coated PVC floor leather; PVC floor tiles, plastic carpets, red mud and fly ash filled PVC floor tiles, plastic wallpaper, roofing materials, such as waterproofing rolls, PE foam ceilings, PVC flame retardant ceilings; doors, windows and other Shaped materials and products, such as stair handrails, treads, partition walls, screens, sinks, floor strips and assembled plastic furniture; 5, plastic sanitary ware, such as plastic whole bathroom, artificial marble sanitary ware and stone. 6, plastic wire, cable . Such as cable materials (PE, PP, PVC), plastic wire, cable (PVC, cross-linked PE). 7, certain industrial plastic products: ① chemical equipment (hard PVC, hand-glued molding glass fiber reinforced plastic, winding molding glass fiber reinforced plastic and other equipment); ② plastic sealing materials (PVC, PTFE and other sealing gaskets, PP seals); ③ electrical products (phenolic plastics, aminated plastics and unsaturated polyester and other electrical products); ④ reinforced thermoset plastic industrial parts (glass fiber reinforced phenolic and epoxy, (glass fiber reinforced phenolic and epoxy, unsaturated poly DS, asbestos fiber reinforced and metal fiber reinforced phenolic plastic parts); ⑤ thermoplastic industrial parts (PVC injection molding fittings, valves, welding rods, reinforced PP parts). ⑤ thermoplastic industrial parts (PVC injection molding pipe fittings, valves, welding rods, reinforced PP industrial parts, cast nylon military parts, MS **** polyresin injection molding high transparency engineering parts). 8, daily use, arts and crafts and other plastic products, such as polyolefin, styrene head comb, soap basin, tea tray; non-toxic PVC pastry box, washboard; diamine plastic tableware; PE cutting board; furniture plastic decorative strips, plastic window screens, inflatable toys, balls; PVC inspection gloves, pearlescent glass buttons, plexiglass craft crystals, PVC drawstring tablecloths, carbon-fiber-reinforced plastic badminton racket poles, disposable syringes, printing, hot stamping, electroplating plastic products, medical PTFE expanded products, cervical cell autoclave, etc..
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What's in Plastic?
Plastic printing is a plastic product . It can be used for packaging purposes. There are beautiful patterns printed on it, such as peach heart's, English letters, animals, and all kinds of things.
To complete this finished product, after many aspects of work. Such as coating, folding, printing, bag making, shaking flowers, packaging.
Gravure printing: refers to the use of intaglio (generally refers to the steel plate) printing, mostly used for plastic printing. Advertising and publicity with the film: refrigerator enclosure film, shopping mall advertising mantle, store head curtains, aprons, plastic composite adhesive-backed posters, suitable for products in the store and outdoor promotional use Commonly used materials: single-layer BOPP, BOPP composite pearlescent film, BOPP composite pearlescent film, aluminum, BOPP composite CPP aluminized, and other material features 1, BOPP single-layer surface printing of the advertisement of the film at a low cost, but easily Deinking, not suitable for long time use; 2, BOPP composite pearlescent film is more commonly used material process, the price is moderate, the printing effect is clear, glossy, colorful, realistic details, but also suitable for outdoor use; 3, BOPP composite aluminized material is suitable for use in the need for reflective places, the price is slightly higher.
What are the types of plastic?
Classification, composition and characteristics of plastic Plastic is a widely used synthetic polymer materials, plastic products abound in our daily life.
From the toiletries we use when we get up, the tableware we use at breakfast, to the stationery we use when we work and study, the seat cushion we use when we rest, the mattress, as well as the shells of the TV, washing machine, computer, and a variety of shapes of lamps and lanterns that bring us light at night. ...... Plastic has gradually replaced many of the products that have been used for decades and centuries with its excellent performance. Has been used for decades, hundreds of years of materials and utensils, become an indispensable assistant in people's lives. Plastic set of metal hardness, lightweight wood, glass transparency, ceramic corrosion resistance, rubber elasticity and toughness in one, so in addition to daily necessities, plastic is more widely used in aerospace, medical equipment, petrochemicals, machinery manufacturing, national defense, construction and other industries.
First, the classification of plastics There are many types of plastics, so far the world into the production of about three hundred kinds of plastics. Plastic classification method is more, there are two commonly used: 1, according to the nature of the plastic heat is divided into thermoplastic and thermosetting plastics thermoplastic molecular structure is a linear structure, when heated, softening or melting, can be molded into a certain shape, and then harden after cooling.
In the heat to a certain extent and re-soften, after cooling and harden, this process can be repeated many times. Such as polyvinyl chloride, polyethylene, polystyrene and so on.
Thermoplastic molding process is relatively simple, can be continuous production, and has a fairly high mechanical strength, so the development is very fast. The molecular structure of thermosetting plastics is a body structure, in the heat also occurs when the softening, can be molded into a certain shape, but heated to a certain extent or add a small amount of curing agent, the hardening of stereotypes, and then heated will not be softened and change the shape.
Thermosetting plastics processed after molding, heat is no longer softened, and therefore can not be recycled, such as phenolic plastics, aminoplastics, epoxy resins, etc. belong to this type of plastic. Thermosetting plastic molding process is more complex, so continuous production has some difficulties, but its heat resistance is good, not easy to deformation, and the price is relatively inexpensive.
2, according to the different uses of plastics are divided into general-purpose plastics and engineering plastics General-purpose plastics refers to the production of large, low-priced plastics with a wide range of applications, including polyolefins, polyvinyl chloride, polystyrene, phenolic plastics and aminated plastics of the five major varieties. Many products used in people's daily life are made of these general-purpose plastics.
Engineering plastics can be used as engineering structural materials and replace metal manufacturing machine parts and other plastics. For example, polyamide, polycarbonate, polyformaldehyde, ABS resin, PTFE, polyester, polysulfone, polyimide and so on.
Engineering plastics have a low density, high chemical stability, good mechanical properties, superior electrical insulation, easy processing and molding, etc., widely used in automotive, electrical appliances, chemical, mechanical, instrumentation, instrumentation, and other industries, but also in cosmic navigation, rockets, missiles and other aspects. Second, the composition of plastic We usually use plastic is not a pure substance, it is made of many materials formulated.
Which polymer (or synthetic resin) is the main component of plastic, in addition, in order to improve the performance of plastic, but also in the polymer to add a variety of auxiliary materials, such as fillers, plasticizers, lubricants, stabilizers, coloring agents, etc., in order to become a good performance of plastic. 1, synthetic resins Synthetic resins are the most important component of plastics, and their content in plastics is generally 40% to 100%.
Because of the large content, and the nature of the resin often determines the nature of the plastic, so people often see the resin as a synonym for plastic. For example, polyvinyl chloride resin and polyvinyl chloride plastics, phenolic resins and phenolic plastics mixed together.
In fact, resin and plastic are two different concepts. Resin is a raw unprocessed polymer, which is not only used in the manufacture of plastics, but also coatings, adhesives and synthetic fibers raw materials.
In addition to a very small portion of plastic containing 100% resin, the vast majority of plastics, in addition to the main components of resin, but also need to add other substances. 2, filler filler is also called filler, it can improve the strength and heat resistance of plastic, and reduce costs.
For example, phenolic resin can greatly reduce the cost of adding wood flour, so that phenolic plastics become one of the cheapest plastics, but also significantly improve mechanical strength. Fillers can be divided into two categories of organic fillers and inorganic fillers, the former such as wood flour, rags, paper and a variety of fabric fibers, etc., the latter, such as glass fibers, diatomaceous earth, asbestos, carbon black and so on.
3, plasticizers Plasticizers can increase the plasticity and flexibility of plastics, reduce brittleness, so that plastics are easy to process molding. Plasticizers are generally miscible with resin, non-toxic, odorless, light, heat-stable high-boiling organic compounds, the most commonly used is phthalate esters.
For example, the production of polyvinyl chloride plastic, if you add more plasticizers can get soft polyvinyl chloride plastic, if you do not add or add less plasticizers (dosage <10%), the hard polyvinyl chloride plastic. 4, stabilizer In order to prevent the synthetic resin in the processing and use of the process by the action of light and heat decomposition and destruction, to extend the service life, to add stabilizers in the plastic.
Commonly used stearate, epoxy resin and so on. 5, colorants Colorants can make plastics have a variety of bright, beautiful colors.
Organic dyes and inorganic pigments are often used as colorants. 6, lubricant The role of lubricant is to prevent the plastic from sticking to the metal mold when molding, and at the same time can make the surface of the plastic smooth and beautiful.
Commonly used lubricants are stearic acid and its calcium and magnesium salts. In addition to the above additives, plastics can also be added to the flame retardant, foaming agent, antistatic agent, etc., to meet the different requirements of use.
Third, the characteristics of plastic 1, plastic with plasticity As the name suggests, plastic is a material that can be molded. The so-called plasticity of plastic is a solid plastic can be softened by heating methods, and then put the softened plastic in the mold, so that it is cooled and re-solidified into a certain shape of the solid.
This property of plastic also has certain defects, that is, when the heat is easy to soften the deformation, some plastics and even higher temperature water will be deformed, so plastic products should not be contacted with boiling water in general. 2, plastic with elasticity Some plastics are like synthetic fibers, with a certain degree of elasticity.
When it is stretched by external forces, the curled molecules are straightened by flexibility, but once the tension is canceled, it will return to the original.
What are the advantages and disadvantages of plastic
(a) the advantages of plastic 1, processing characteristics of good plastic can be processed into a variety of shapes according to the requirements of the use of the product, and the processing process is simple, and is suitable for the use of mechanization of large-scale production. 2, lightweight plastics density of 0.8-2.2g/cm3, generally only 1/3-1/4 steel, aluminum 1/2, concrete, 1/3, and wood is similar to the density of 0.8-2.2g/cm3, generally only steel, aluminum, concrete, concrete, aluminum, concrete and wood. 1/3, similar to wood. Used for decorative works, can reduce the construction intensity and reduce the weight of the building. 3, the specific strength of plastic is much higher than the specific strength of cement and concrete, close to or even exceeding the steel, belonging to a lightweight and high-strength materials. 4, the thermal conductivity of small plastic thermal conductivity is very small, about 1/500-1/600 of the metal. The thermal conductivity of foam is only 0.02-0.046W/mK, which is about 1/1500 of metal, 1/40 of cement concrete, and 1/20 of common clay brick, which is the ideal insulation material. 5, good chemical stability of plastics to general acids, alkalis, salts and oils and fats have good corrosion resistance, much better than metal materials and some inorganic materials. Especially suitable for chemical plant doors, windows, floors, walls, etc. 6, good electrical insulation is generally a poor conductor of electricity, its electrical insulation can be comparable with ceramics, rubber.7, good performance design can be changed by changing the formula, processing technology, made of engineering materials with a variety of special properties. Such as high-strength carbon fiber composite materials, sound insulation, thermal insulation composite panels, sealing materials, waterproof materials, etc. 8, rich in decorative plastic can be made into transparent products, can also be made into a variety of colors of the products, and color and lustre is beautiful, durable, but also can be used in advanced printing, embossing, electroplating and hot stamping technology to make a variety of patterns, patterns and the surface of the three-dimensional sense of the sense of the products of the metal sense of the 9, is conducive to the industrialization of construction many Building plastic products or accessories can be produced in the factory, and then assembled on site, can greatly improve the efficiency of construction. (B) the shortcomings of plastic 1, easy to aging plastic products aging refers to the products in the sun, air, heat and environmental media such as acid, alkali, salt, etc., the molecular structure produces recursive changes in the plasticizer and other components of the volatilization of the chemical bond to produce a fracture, which brings about the deterioration of the mechanical properties, and even the occurrence of hard and brittle, destruction of the phenomenon. Through the formulation and processing technology and other improvements, the service life of plastic products can be greatly extended, for example, plastic pipe can be used for at least 20-30 years, up to 50 years, longer than the service life of cast iron pipe. Another example is Germany's plastic doors and windows of the actual application of more than 30 years, is still intact. 2, flammable plastic is not only combustible, and in the combustion of large amounts of smoke, and even produce toxic gases. But by improving the formula, such as adding flame retardants, inorganic fillers, etc., can also be made into self-extinguishing, flame retardant or even non-combustible products. However, its fire performance is still worse than inorganic materials, in the use of attention should be paid. In some parts of the building is easy to spread the flame can be considered not to use plastic products. 3, poor heat resistance plastics generally have heat deformation, and even produce decomposition of the problem, in the use of attention to its limiting temperature. 4, rigidity of small plastics is a visco-elastic material, low modulus of elasticity, only 1/10-1/20 of the steel, and in the long-term action of the load is susceptible to creep, i.e., the continuation of the deformation over time. Increase. And the higher the temperature, the faster the deformation increases. Therefore, used as a load-bearing structure should be careful. But the fiber reinforced composite materials such as plastics and some high-performance engineering plastics, its strength greatly improved, and even can exceed the steel.