Modified plastic refers to plastic products that have been modified by filling, blending, and strengthening on the basis of general plastics and engineering plastics to improve the properties of flame retardancy, strength, impact resistance, toughness, etc.
At present, modified plastics have been applied in more and more downstream fields with superior cost performance. It can be said that modified plastics have become a consumer trend.
Five factors implied behind the trend of modified consumption
High performance: Modified plastics not only have the advantages of traditional plastics, such as low density, corrosion resistance, etc., while physical and mechanical properties are well improved, such as high strength, high toughness, high impact resistance, wear resistance and shock resistance, The improved overall performance of plastics provides the basis for its wide range of applications in the downstream sector.
Low cost: Compared with other materials, plastics benefit from high production efficiency and low density, and have lower cost. The cost per unit volume of plastic is only about one tenth of that of metal.
Government policy: China's “3C†compulsory certification system has strict regulations on the safety performance of products in the catalogue, thus promoting the wide application of flame retardant plastics in household appliances, IT, communications and other fields.
Consumption upgrade: With the improvement of living standards, people began to pursue more excellent product performance, requiring home appliances and other products to be more beautiful, safe and durable, thus placing higher demands on the upstream plastics industry, requiring them to have better processing performance. , mechanical properties, durability and safety.
Technical factors: More than 1,000 kinds of polymers have been found in the world, but there are only dozens of real application values. The development of new polymers is not only huge, but the application prospects are uncertain. On the contrary, the modification technology can not only improve the existing polymerization. The performance of the material to meet the needs of the industry, while reducing the cost of some high-priced engineering plastics, has become an effective way to develop the plastics industry.
Main categories of modification
According to the modified function, the modified plastics include flame retardant resins, reinforced and toughened resins, plastic alloys, functional color masters and the like. The various types can be subdivided according to different materials, and the application fields are different due to their respective performance differences.
The modification technology includes physical methods such as blending, filling and reinforcement, and chemical methods such as copolymerization and cross-linking. The physical method is the most important modification method at present. Blending, filling, etc. need to select suitable modifiers and fillers to achieve specific Modification purpose.
The basic techniques of modification technology include
Enhancement: Blending glass fibers and the like with plastics to increase the mechanical strength of the plastic.
Filling: Blending minerals and other fillers with plastics to change the shrinkage, hardness, strength and other properties of the plastic.
Toughening: The toughness of the plastic is added by adding a toughener blend to the ordinary plastic to toughen the modified product: rail gasket.
Flame retardant: Adding a flame retardant to the ordinary plastic resin can make the plastic have flame retardant properties. The flame retardant can be a composite system of one kind or several flame retardants, such as bromine + lanthanum, phosphorus, nitrogen. Systems, silicon systems, and other inorganic flame retardant systems.
Cold resistance: increase the strength and toughness of plastics at low temperatures. The low temperature brittleness of plastics at low temperatures generally limits the application in low temperature environments. It is necessary to add some low temperature toughening agents to change the brittleness of plastics at low temperatures, such as automobile insurance. Plastic parts such as bars are generally required to be cold resistant.
Application areas of modified products
The automotive industry has become the fastest growing area for demand for modified plastics. This is mainly due to: First, the global car production growth rate is stable; Second, the car lightweighting makes the amount of bicycle modified plastics increase. The growth rate of domestic automotive modified plastics is much higher than the global average. In particular, China is already the world's largest new energy vehicle market, and new energy vehicles need more support from lightweight technology.
Source : Engineering Plastics Net
Cement float equipment Float Collar and Guide Shoe
Float collars are placed one to three joints above the guide shoe or Float Shoe. They provide a seat for the cement plugs, the bottom plug pumped ahead of the cement and the top plug behind the full volume of slurry.
Float shoes contain a backpressure valve that prevents fluids from entering the casing while the pipe is lowered into the hole and prevents cement from flowing back into the casing after placement, while enabling circulation down through the casing.
1. Grade: J55, K55, N80, P110, L80, etc.
2. Connection (Thread) Type: LTC, STC, BTC, VAM TOP, Premium Connection
Characteristics
1) All inner parts are made of easily drillable aluminum alloy;
2) The device can be connected directly to same type casing;
3) Reliable back-pressure leak proof structure, enable grout or slurry flow with less resistance;
4) Valve seat and valve disk can effectively prevent grout from flowing back;
Guide Shoe
Spring Float Collar Shoe,Float Shoe Cementing,Cycling Shoe Float,Oilwell Mechanical Float
Puyang Junhong Rubber Co., Ltd. , https://www.pyjhxs.com