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Plastic modified development present situation and trend

Abstract:Abstract: the general plastics and engineering plastics engineering high-performance, high-performance, low cost change and general engineering plastics in recent years has been the development goal of engineering plastics. Our modified plastics in the plastics industry to promote the rapid development of next, in view of the blending modification, filling modification, plastic wood composite, renewable, nano composite, environmental protection the general direction of development. Combined with the "eleventh five-year plan" planning details, a detailed analysis of the current development status of modified plastics and trend.

Keywords: modified plastics; The development of modified plastics, The present situation of the modified plastics

1、the definition of modified plastics

Modified plastics is a primary form resin as the main composition, in order to can improve resin in mechanics, rheological and combustibility, electricity, heat, light, such as magnetic one or a few aspects of performance additives or other resin as auxiliary components, through the filling, toughening, enhance, blending, alloying and other technical means, get the materials with uniform appearance.

2、the classification of modified plastics

Modified plastics products are mainly divided into three categories, one kind is powder material as the main raw material filling modified plastic products, including active powder, filling masterbatch and powder material accounted for 20% ~ 30% of the modified plastics raw materials; Another kind is different types of high polymer material after blending "plastic alloy" made of special material, ABS/polycarbonate (PC) alloy, PA/ABS alloy, polypropylene (PP) / PA alloy, etc; The third class is to achieve electricity, light, heat, burning and other aspects of the functional, comprehensive use of functional filler and different types of high polymer materials, and a moderate amount of compatilizer, toughening agent and made of special functional materials, such as flame retardant ABS, halogen free flame retardant PP, automobile bumper, instrument panel special materials, etc. Three kinds of modified plastics products in the production has more than 3000 kt, three kinds of the proportion of products were 50%, 35% and 15%, or 1600 kt, 1 000 kt and 600 kt or so.

3、Classification of modified plastics

Reform and opening up 30 for many years, of our country plastic industry benefit from the compilation of economy development of plastic huge demand, obtained the development which progresses by leaps and bounds. Annual output from the 1980 s, more than 100 t has been increased to 7 more than 000 t. Consumption per capita in China plastic has already surpassed the per capita level, the production has in the world, is made of plastics country to plastic power forward. Our modified plastics in the plastics industry to promote the rapid development of, the no to have, from small to large, from low grade single filling modification and has development to all types of modified plastics, almost involves all plastic products. Modified plastics has become China's plastics industry an important and indispensable constituent of. Our modified plastics production has a strong regional, mainly concentrated in guangdong, zhejiang, jiangsu, shandong, Shanghai, etc. There are thousands of enterprises engaged in the modified plastics production, the scale above modified plastics enterprise nearly hundred, capacity of more than 3000 t about 70 or so. At present, China's modified plastics products, some high-end product is not fully meet customer demand. So imported modified plastics on the market still occupies a large proportion.

4、China modified plastics "11th five-year plan" period development situation

4.1   modified plastics industry 11th five-year plan has basically realized the sweat of specialization, scale and functionalization

According to the 2010 China modified plastics industry top ten enterprises selection activity each modified plastics enterprise reported data analysis, the country had been with modified plastic products for the main business enterprise nearly 1000 home, employment of several hundred thousand people. In addition to and modified plastics industry closely related auxiliary agents, additives enterprise and mixing processing equipment manufacturing enterprises more than 200 home. An active in large petrochemical enterprise and plastic products processing enterprises of between by modified plastics and related supporting more than 1000 enterprises of modified plastics forming army has been formed, the basic realization of the industry specialization, scale and functionalization.

4.2  through the thinking and innovation, technological innovation and product innovation, to create the industry, the sustained and rapid development and prosperity of the situation

In the eleventh five-year plan period, modified plastics industry through the thinking, technology and product innovation, make industry get a sustained, rapid development. The following lists have realized industrialization or obtain stage results of several examples.

4.2.1  The ACS

The ACS is in chlorinated polyethylene (CPE) rubber elastomer on grafting on acrylonitrile (A) and styrene (S) monomer and become graft copolymer, it is to use saturated rubber elastomer CPE instead of containing unsaturated bond (double bond) polybutadiene elastomer, so is better than ABS better weathering, and at the same time, also have A certain antistatic properties and flame retardancy. Visible, ACS aging resistance is better than that of acrylonitrile - styrene - acrylic ester copolymer (ASA), ABS. ABS by weather resistant test instrument short-term exposure, namely will yellow, and ACS exposure 1000 h still don't change color, and other resin has the varying degree change color.Holdings high resistance through flask, film with nano composite PET.

4.2.2  Out PA/ABS alloy

PA/ABS alloy don't need to add honed agent can bring special surface soft inferior smooth effect, it give full play to the PA excellent resistance to chemical corrosion, thermal stability and ABS good dimensional stability, low temperature impact resistance, and at the same time, crystal materials and amorphous material in the union of PA/ABS alloy also received good damping and sound absorption performance, very suitable for automobile manufacturing.

Beijing lofty nano science and technology co., LTD. Will the layered silicate to nanoscale (about 30 nm thick and 1000 nm length-width) scattered in the size of the PET, silicate with layered orientation form Mosaic type configuration, can greatly improve the PET's resistance permeability, reduce the oxygen permeability, and also can significantly improve PET strength and heat resistance. High resistance through type nano composite PET resin apparent characteristic viscosity is 0.72 Pa/s, oxygen through rate is pure PET reduced 30%, can be used to strengthen and enhance flame retardant, toughening, low warpage and engineering plastics processing, can also be used to high resistance through requirements of the PET packing bottle, thin film products processing.

4.2.4   new light color antistatic packing

Will not conductive non-metallic mineral powder on the surface it deposits a layer of certain conductivity material made of light color conductive filler should become solve plastic material antistatic new ideas. According to the SnO2 crystal such as doping a certain amount of other metal ion make its lattice defect that could have semiconductor properties this one principle, in cheap quartz powder surface coating a layer of doping Sb2 of O3 SnO2, make to quartz for nuclear, the surface can guide electrostatic light color antistatic packing. Laboratory made of this kind of antistatic packing itself resistivity is 6 x10 6 Ω · cm used for dispensing antistatic coatings, and the resistance rate of 1.57 x107 Ω · cm, antistatic performance meet the national "liquid petroleum products antistatic safety rules" standards.

4.2.5  talc powder in the application of plastic weaving products

With talcum powder instead of coarse whiting powder filler masterbatch application effect shown in the following aspects: (1) flat wire glittering and translucent get rid of appearance, a high-grade feeling; (2) no dust pollution; (3) electrostatic phenomenon greatly reduce; (4) no Pi wire; (5) wire drawing machine exit paste little, material diaphragm smooth, with less water, (6) easy to food hygiene requirements; (7) with high-grade calcium carbonate masterbatch, compared with talcum powder concentrate on PP mechanical properties of better effect.

4.2.6  environment XiaoNa plastic

"But the environment XiaoNa" refers to the plastic waste in to adapt to the "garbage landfill, composting and burning, and other comprehensive governance mode, can be in natural or man-made environmental conditions, as far as possible in a short period of time fully and environmental assimilation". Fujian normal university college of chemistry and material of the invention patent "biodegradable PE plastic can be burned" (ZL99111 037.) already in 2004 May obtain a patent license, this kind of add have the biological active treatment of inorganic powder and photosensitizer plastic, both biodegradable and burned in when reduce exhaust of the impact on the environment. Use polymerization and become powdered resin by adding an appropriate amount of inorganic powder material and the necessary auxiliaries can produce "environment XiaoNa plastic special resin", this kind of special material and ordinary plastic resin price quite, processing and become products use performance can achieve corresponding national standards, products forming equipment, mould need not change, the production of raw materials single, the operation is convenient, the process stability, plastic products into the natural environment after use or artificial disposal environment to XiaoNa environment, and finally return to nature, reduce the harm of "white pollution".

4.2.7  carbon fiber reinforced engineering plastics

Carbon fiber reinforced PA is a high performance of high-tech composite material, in the notebook computer, wind power generation equipment, bearing gear, textile machinery, and other aspects have been widely used, the demand of nearly ten thousand tons, in China's military industry, aerospace, aviation and the application of other materials is not possible alternative, is born in 2012 in China made his large aircraft will also use the high strength but also has a high rigid polymer composite material, its market demand will increase quickly. Carbon fiber reinforced PC, polyether ether ketone (PEEK), and other engineering plastics also is of great significance. Countries attach great importance to carbon fiber composite material (CFRP) development and production, the national development and reform commission will "carbon fiber composite material national engineering laboratory" included in the implementation of the "national independent innovation foundation ability construction of the" eleventh five-year plan "planning", the construction of a number of national engineering research center and the national engineering laboratory projects, to "promote the transformation of the mode of economic development and promote upgrading of the industrial structure, speeds up the high technology industry development" the effect; Science and technology also made "high-performance carbon fiber key technology development" listed in the national high technology research and development program (863 program).

5、modified plastics development trend

5.1  blending modification

In addition to filling modified outside, plastic modified another big branch for blending modification. Compared with filling modification, the blending modification in product quality and yield relatively backward, cannot satisfy the demand of the market. Blending modification is to increase an important means of plastic raw materials resources, only on petroleum chemical synthetic co., LTD., kinds of resin, can't satisfy the all kinds of plastic products of the production need. Blending modification are based on one of the resin as matrix, with the other one or more team points to modified resin matrix resin. The performance of different resin according to a certain proportion mixing, through the double screw extruder or other mixing equipment, its mixing into with the original resin has different performance of the new material, also called plastic alloy. Plastic alloy has many types, such as plastic and rubber (elastomer) alloy, HDPE and LLDPE or LDPE and LLDPE. Can be two yuan, also but three yuan or multiple.

5.2  filling modification

Filling modification at present mostly adopts the masterbatch filling method, because the method simple process, easy production, the same kind of masterbatch can be used a variety of products, and other advantages, the deficiency is often appear because of dispersion is bad and influence the product quality. Many manufacturers some products, in order to ensure the quality of products, in the hope that the special material. Practice has proved, for the same kind of products in guarantee identical quality requirement conditions, using special material can increase 5% inorganic powder dosage, can save 5% of the resin. For filling masterbatch production enterprises, the production of modified special material than production filling masterbatch can get better economic benefit.

5.3  plastic wood composite (WPC)

Plastic wood composite materials is to develop more successful and has a broad application value and prospects of the development of modified products. Plastic wood composite materials from the composite form to see has many, of which the most widely used is thermoplastic resin and plant powder or fiber composite. Plastic wood composite materials with high hardness, strength, water resistance, stability, not changeful form, coloring, secondary processing, and other features, is a kind of resource conservation and environment friendly ideal material. WPC is generally composed of three kinds of component composition: wood powder (plant powder), processing aid and resin. Wood powder is by lignin, cellulose and hemicellulose constitute, belongs to the natural polymer, liquidity is poor, because it contains a certain moisture and a weak acid, after heated can decompose and release large amounts of gas, and at the same time, acid increase to screw can cause chemical corrosion, such as high temperature will also be carbonized zoom. Another W P C itself heat transfer coefficient is low, forming hard to cooling, time is too long easy deformation. The above various factors all can cause production efficiency is low, the yield is low, the product quality is not stable.

5.4  renewable plastic modification

With the development of the plastics industry, waste plastic how to reasonable disposal, and lessen the pollution of the environment, and realize resources to maximize, is always people concerns. Practice has proved that recycling is the best way to solve the waste plastic. Our country has rich resources of waste plastic, according to relevant data reported, at present our country every year 1 will produce more than 000 t waste plastic, plus imports, a total of 1 600 ~ 1 8 million t, accounting for the total plastic dosage of 1/3. In theory renewable plastic modification principle and modification methods and new material is basic and same, the difference is reworked material modification of strong pertinence, through the test and analysis, to determine the reworked material to the extent of loss of comprehensive performance, to choose modification methods. Specific approach is: first measurement reworked material basic properties, such as ash content, melt flow rate, tensile strength, elongation, bending and impact strength. General resin melt flow rate is larger, the higher the degree of degradation, the comprehensive mechanical properties of the loss. And PE is different, the melt flow rate is smaller degradation degree is higher, because PE degradation in the process, can produce partial crosslinking. According to the analysis results, determine the modification scheme. For renewable plastic, generally USES the blending modification methods, improve the material toughness and strength, can use the same kind of different performance between reworked material or additions new material methods, and use the most way is by and elastomers such as b/c rubber, SBS and SEBS or EVA blending to improve material toughness, through the fill and fiberglass or other fiber material to improve the strength of the reworked material. In order to reduce costs, the modified material usually use reworked material. In the use of performance guarantee the premise of blending modification can also fill with some inorganic powder, such as fill with talcum powder can increase the rigid material, fill and wollastonite or other acicular powder can increase the tensile strength.

6、China modified plastics industry problems

(1) the lack of investment in science and technology, the ability of independent innovation is weak

(2) large and medium-sized modified plastics enterprise (group) less, not form intensive scale operation

(3) of domestic raw materials supply falls short of demand, modified plastics materials needed a lot of it relies on import

(4) modified plastics standardization work relative lag

7、epilogue

Modified plastics industry developed rapidly, and the current and future domestic market for modified plastic demand growth is very strong. In the current financial crisis, most of the modified plastics enterprise's production and sales is still keep both production and marketing thrive good momentum, fully proved this new material industry development vitality. But raw material prices continue to rise, environmental protection laws and regulations strictly and users to continuously improve product performance requirements of some factors such as the industry development continuously put forward new challenge, firmly grasp the development of the industry trend and actively to promote technological innovation become the modified plastics enterprise meet the challenge and the continuous development of the magic weapon. In the fierce market competition, a batch of excellent domestic modified plastics enterprise, such as blonde technology, silver jubilee science and technology, department makes plastic company, pay attention to research and development, innovation and enterprising, become a leader in the field of modified plastics segmentation. Each enterprise should also hold the current modified plastics industry development good opportunities, grasp the application research hotspot to speed up research and development, for the enterprise's sustainable development reserve technology, promote the international competitiveness of modified plastics.

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