The purpose of modified plastics is to improve or improve the physical properties of plastics. The general plastics and engineering plastics are modified by blending, filling, strengthening, copolymerization and cross-linking.

Plastic filling and modification is a new industry in the plastics industry which develops rapidly in recent years.

With the rapid development of plastic industry, filling masterbatch is no longer a single application for filling materials, people with more advanced technology from mixing, mixer mode of production, after adding inorganic material, chemical fertilizer, and other materials highlights their respective characteristics and commonness, and adopts double screw extruder, the three screw extruder with mixing extruder, has become an important way to improve the plastic products of special performance and methods.

  

First of all, the light weight of automobile should be realized, and the application requirements should be met. However, it is difficult to realize the application requirements of single resin. Plastic modification has become an indispensable important technology and material.

In 2017, China's total automobile output reached 29,015,400 units, and the demand for modified plastics exceeded 5 million tons, showing a rapid growth trend.

The hollow glass microbeads developed by maanshan new material co., ltd. of sinosteel group have a density of 0.28g/cm3~0.6g/cm3. When PA, PP, PC, ABS and other resins are added, the physical properties are improved while the density is significantly reduced.

Second is the home appliance industry.

At present, many plastic parts have replaced metal parts in all kinds of household appliances. The annual demand for various plastics and the demand for modified plastics have increased by double digits and is increasing year by year.

Jiangxi new material co., LTD. Of China energy saving group has successfully developed the fine quartz powder which can be applied to plastics and rubber, reduce the wear by 10%, improve the impact density, insulation and chemical stability.

Thirdly, the application advantages of various modified plastics in the communications industry are highlighted. Most of the components such as laptop cases, baseplates and mobile phones use modified plastics.

Materials such as ABS/ carbon fiber, PA/ carbon fiber, PP/ carbon fiber, resin/silicon powder, etc., these new high-strength plastic functional materials have gradually replaced metal materials.

Li zhigang of ningbo bolilong composite material technology co., LTD., which is a "invisible champion", is devoted to the research of carbon fiber/resin materials used in laptop, automobile, intelligent machinery and other industries.

Fourthly, with the increasing requirements of insulation, flame retardance and lightweight of various electric tools, the function of plastics can be improved or improved to meet the application requirements of products.

The modified agent developed by nanjing jinlaiwang plastic technology co., LTD can reduce the oil absorption value of inorganic powder by more than 10% and improve the gloss, toughness and impact strength of plastic products.

Fifth, the application of modified plastics in railway, military, medical and aerospace is more and more extensive.

Artificial organs, artificial bone joints and functional modified plastics which are resistant to high temperature, aging and high strength have played a positive role in the rapid development of high technology.

PP, PA, ABS, PS and talc, wollastonite, mica, silicone powder, carbon fiber and other composite modified materials produced by guangzhou golden hair technology co., ltd. have been applied in automobile, medical, military and other industries.

Sixth, bio-based plastics are new biodegradable materials, which are synthesized by the raw materials of complete degradation extracted from renewable plant resources. After discarded, they can be degraded and absorbed in the natural environment, thus reducing environmental pollution, which is called green plastics.

Bio-based plastics have a broad market prospect in biomedicine, green medical equipment, automobile decoration, electronic appliances and disposable daily necessities.

By modifying, filling, foaming and other processing techniques, biological base plastics can improve the properties of materials, reduce production costs and expand application areas.

Zhu jin, a researcher at ningbo institute of materials, Chinese academy of sciences, has studied the modification and application of polylactic acid.

Guangzhou garden fine materials technology co., LTD. Production of polylactic acid modification, foaming, 3 d printing, special materials, such as injection molding, sheet make heat resistant poly (lactic acid) (PLA) temperature over 100 ℃, reduce the cost of materials, expanding the market applications.

Development status of modified plastics

Filling modification

The main purpose of filling master material is to reduce production cost. Most of the materials are made of inorganic powder or industrial waste with low price and wide range of sources.

Heavy calcium carbonate filler is widely used in the plastics industry, and the manufacturer is all over the country, with an annual output of more than 5 million tons.

Tianjin yuquan industry and trade co., LTD. Adopts the environment-friendly production process of blending, extrusion and granulation to produce granular mother material. The products are mainly used in the olefin plastic products such as blister, injection and calendering.

The PLA/CaCO3 packaging film developed by fujian southeast new material co., LTD. Adds more than 50% calcium powder, which reduces the raw material cost and facilitates the complete natural degradation of the discarded products.

Light calcium carbonate is widely used in PVC pipes, special-shaped materials, plates and other products. The functional modifier developed by guangdong dongguan aoda chemical co., ltd. is applied to PVC products, which can increase impact strength by 60% and elongation by 200%, increase the dosage of filling materials, and improve shrinkage and appearance of plastic products.

In recent years, light calcium in the production process of high energy consumption, pollution, by the national environmental policy constraints, many plastic products gradually replaced by heavy calcium carbonate light calcium carbonate.

Modified masterbatch

Modified master material is a new modified material developed on the basis of filling master material.

Into resin fiber glass, barium sulphate, talc, mica, wollastonite, kaolin, such as inorganic materials, or with special performance is added in the processing of synthetic resins or additives, such as: anti-aging agent, antioxidant agent, flame retardant additives or POE, EVA, etc., these composite materials in the application of the functional characteristics of different materials.

For example, the application of PP talc powder, such as automobile bumper, instrument panel and automobile interior decoration, has the advantages of improving impact strength, improving bending modulus, reducing shrinkage and reducing rigidity loss caused by vehicle impact.

The resin/wollastonite/silicone powder modified master material developed by dalian global technology co., LTD. Is used in plastic parts such as automobile engine peripheral and headlamp bracket, which can improve physical properties and thermal deformation temperature of plastic products by 40%~60%.

Steel-plastic hot melt adhesive and compatibilizer produced by hebei jintian plastic new material co., LTD. Are used for metal/wood powder/mineral/plastic composite materials to improve the compatibility of different materials and enhance mechanical properties.

Function of modified

Add graphene plastic, silicone powder, rare earth, magnesium hydroxide, metal micro powder, silver, copper, zinc, etc.) of various materials, such as through modification technology make the product index, flame retardant, aging resistance, high and low temperature resistance and other physical properties improved, also can realize the conductive, antibacterial, insulation, special performance, such as enhanced has occupied a place in the main durable plastic products on the market.

CGNPC jung's new material co., LTD is a famous high-performance modified engineering plastics research and development manufacturing enterprise, the main products are modified nylon, modified polycarbonate, modified polyester, modified polyolefin thermoplastic continuous fiber composite materials and special engineering plastics, used in industrial electrical appliances, automobiles, electronics, building materials, new energy, aerospace and nuclear power, and other fields, a number of products exported to Europe and the United States and other countries.

Beijing factory is building materials co., LTD Xue Mingsheng high for many years research of resin/aluminum alloy double scleroma skin micro foaming wood floor outdoor sports, combined with mortise and tenon joint, tear open outfit, mobile convenience, the advantages of non-toxic, tasteless, environmental protection, accord with American ASTMF2772-11 and GB standard of GB/T 19995-2 requirements, is the new generation of green environmental protection new floor exercise.

Multiple composite modification

The carbon fiber/synthetic resin/functional agent composite modified material developed by huihe plastics co., LTD. Yuyao city, zhejiang province is used in oil drilling engineering, aircraft, household appliances and other parts.

Multiple compound modification mainly by putting the plastic "alloying method, one or a combination of plastic and inorganic materials, polymeric materials, chemical additives, etc., through blending, grafting, block form together, make the performance of each composition mutual complement each other, form a kind of plastic material with many excellent properties, so as to achieve the goal of improving performance and more functional.

These materials "alloy", after being used in high-tech industry, have the characteristics of light quality, high strength and excellent performance, and become new functional materials in aviation, aerospace, automobile, railway, mechanical parts, medical materials and other aspects.

College of material science and engineering, north main research direction is high performance processing for plastic and functionalization, the success of nylon flame retardant composite material, nylon/inorganic materials/magnesium hydroxide, sodium antimonate and zinc borate compound modification, flame retardant performance to class V - 0, environmental effect, improve the heat resistance, used in electronics, electrical appliances and military products.

Special modification

Adding different functional materials or auxiliaries in special plastics makes the expensive special plastics not only maintain the original characteristics, but also have special functions, and adapt to the market application of various products.

Such as polyphenylene sulfide (PPS), polyimide (PI), polyether ether ketone (PEEK) and polysulfone (PSF) and liquid crystal polymer (LCP) high performance resin, such as adding carbon fiber, graphene, liquid crystal polymer, the different materials such as rare earths, has good performance, high temperature resistance, dimension stability and special flame retardant, resistance to radiation, chemical resistance and mechanical properties, the modification of new materials in electronic appliances, automobiles, home appliances, aviation, petrochemical industry, and the rockets, aerospace and other cutting-edge technology has more and more important application areas.

Chongqing keyiying new material co., LTD. Has developed and mass-produced nylon/liquid crystal polymers, and applied nylon /PC composite modified materials to automobile and military industries, and achieved satisfactory results.

Development trend of modified plastics

Inorganic materials nano

Inorganic materials are widely used in plastics. The functions of inorganic materials gradually emerge with the superrefinement of grain size. The plastics modified by inorganic nano powder have many unique properties, bringing new development opportunities to the development of plastics industry.

Inorganic nanoparticles can give plastics new functions, improve the aging resistance and flame retardant effect of plastics, and improve the thermal change temperature and wear resistance.

The thermal deformation temperature of PA6 modified with 5% organic montmorillonite could be increased by 1.5 times.

Adding nano-clay into PET greatly reduces the gas permeability of the material, which is 100 times smaller than that of pure PET.

The amount of inorganic nanoparticles in plastics is small, generally 3%~5%. The density of composite material is almost unchanged or small increase compared with the original resin, and there are no other defects of poor performance caused by excessive filler.

Chemical auxiliaries are highly effective

Developing new efficient additives has become an important development direction of modified plastics, modified plastics involves additives commonly used in addition to plastic processing additives, such as heat stabilizer, plasticizer, uv absorber, nucleating agent, antistatic agent, dispersing agent and flame retardant thereof, toughening, flame retardant, increase efficiency, alloy compatible (interface compatibility) efficiently, multi-effect functions such as additives of modified plastics is also critical.

In general, the type and quality of some additives play a key role in the performance and cost of modified plastics, especially in the new toughening agent, flame retardant and alloy compatibilizer, which are of great significance in realizing high performance of engineering plastics and low cost of special engineering plastics.

Modified plastics are environmentally friendly

As people's environmental protection consciousness enhancement, and increasingly strict environmental regulations, plastic renewable utilization, environment can be given, biodegradable, non-toxic, tasteless, no pollution and other environmental protection concept has been integrated into the design and manufacture process of modified plastics, should pay attention to the conservation and rational utilization of energy resources, research and development of no pollution, degradation and recycling utilization of green environmental protection modified plastics products become the new hot spot.

Modified plastics is a marriage between different industries. It should pay attention to the improvement and improvement of production technology, and pay attention to the theoretical and practical research and popularization of multiple composite materials and multiple process technologies.

Especially in the study of the production of green biological application, special function material batch production, such as carbon fiber, liquid crystal polymer, graphene, etc.), the selection of inorganic mineral powder, the nano-sized materials scattered application technology and surface modification treatment, etc, should cause the high attention of industry, enterprises and experts, for China's plastics industry can contribute to the green environmental protection low carbon development.

The industry of modified plastics in China has been developing rapidly and the competition is fierce. There are still some deficiencies in technical research and product application research. Therefore, it is necessary to strengthen technical exchanges with foreign counterparts, increase cooperation with international famous enterprises, and accelerate the development of modified plastics to the top level.

Foreign plastic products attaches great importance to the product durability, functionality, recycling, and China plastic products will cost and price as the first condition, not only affected the application effect, to the natural environment is difficult to solve the difficulties, especially in the aspect of agricultural plastic film, packaging and other particular, has aroused the government and the industry's high attention.