News Center

1 Overall situation of the industry

2018In 2010, China's environmental situation continued to improve compared with the previous year. In particular, the introduction of a series of policy documents related to atmospheric environmental protection promoted the demand and development of the industry, and the state's investment in environmental protection and environmental protection economic policies were better implemented and strengthened. The three sub-fields of dust removal filter materials for smoke and dust control, filter materials for air purification, and filter materials for liquid-solid separation have all developed rapidly in 2018.

The good overall situation contains huge opportunities, triggering a new round of investment impulse, and the desire to invest continues to increase. Some filter material technology transformation projects are on the way. Tiantai cluster, Funing cluster and some advantageous enterprises are continuously increasing investment in technological transformation, which continues to drive the innovation, transformation and upgrading of the industry.

2018The annual market size of bag dust removal filter material is about 7.5 billion yuan, the output value growth rate is 15%, the output growth rate is 20%, and the profit margin is about 10%. Overall, the annual output of the filter material and filter bag industry increased significantly in 2018, with more orders from manufacturers, large production tasks, short delivery schedules, shortage of skilled workers, and high financial pressure. Due to the intensification of market competition, the growth rate of output value and profit margin have decreased.

The innovation of air purification and individual protection materials is continuously advancing. In 2018, the market size of air purification and individual protection filter materials is about 3.5 billion yuan, with an output value growth rate of 16% and a profit margin of 15%.

Liquid filtration materials are mainly woven fabrics, knitted fabrics and woven fabrics. Non-woven, electrostatic spinning, melt-blown, membrane materials and other technologies are also developing rapidly. Application fields include mineral processing filtration, chemical liquid-solid separation, sewage treatment, Drinking water purification treatment, seawater desalination, etc. In 2018, the market size of liquid filtration materials was about 4 billion yuan, with an output value growth rate of 18% and a profit margin of 20%.

2 Industrial dust removal filter material industry

2.1 Industry development status

2018In, the unit price of industrial dust removal filter products decreased slightly, and the output of filter materials increased more than in 2017, but the growth of sales and profits was less. Due to the reduction of product profit margin, it is more and more difficult for small and micro enterprises to survive, and the market concentration is gradually increasing. In 2018, the industry has done a lot of work in improving equipment level, product innovation, refined management, and improving service level, and achieved good results.

2018In, the scale of China's dust removal filter material industry cluster continued to expand, forming an industrialized regional distribution dominated by Liaoning filter material cluster, Yangtze River Delta filter material cluster, Funing filter material base and Tiantai filter material base, of which Liaoning filter material cluster output value is 1 billion yuan, Yangtze River Delta filter material cluster is 2 billion yuan, Funing filter material base is 2.5 billion yuan and Tiantai filter material base is 1.5 billion yuan.

2018In, the filter material market in the iron and steel industry maintained a good trend. In addition to traditional flue gas filtration such as ironmaking blast furnace gas, front flue gas, ore tank dust, converter secondary flue gas, lime kiln flue gas, the filtration of sintering flue gas, fluidized bed dust, and high-concentration flue gas after semi-dry desulfurization has become a new hot spot, triggering the innovation and research of filter materials. Based on ultra-low emission design of ultra-fine fiber, high-density surface layer filter material in the field of steel has been new applications, and achieved good results, 5 mg/m.³The following emission concentrations become the norm. New products emerge in endlessly. After the success of the converter, the island fiber filter materials of Northeastern University and Zhejiang Yubang Company began to expand more fields. Shandong Feibo New Materials Company's modified PPS fiber is being applied in the sintering field due to its improvement in temperature resistance and oxidation resistance.

In terms of special high-performance fibers, due to the pull of the market demand for filter materials, especially the rapid development of heat-resistant and corrosion-resistant high-end filter materials market, the pace of innovation of high-performance domestic fibers has accelerated significantly. Domestic polyimide fiber, polyphenylene sulfide fiber, PTFE fiber, aramid rapid development, quality has been close to the level of foreign products, with strong market competitiveness.

2.2 Due to the lack of strength and integration, it is difficult to achieve a big breakthrough in new material innovation.

The number of private enterprises accounts for the vast majority in the filter material industry. The scale of enterprises is small, the total assets are small, and the overall strength is weak, but they all have the motivation and urgent demands for development, expansion of production capacity, and fund-raising. Private enterprises have some problems, such as the overall low level of management and technology, the serious lack of high-level management and technical personnel, and the large mobility of talents, which restrict the development speed of enterprises to a certain extent. In addition, the quality stability of domestic filter products has become an important bottleneck affecting the development of filter materials in China, which needs to be improved.

2.2.1New product of filter material

Laminated filter material to be improved:Under the situation of increasingly stringent emission standards, the film-coated filter material has received more attention and has become a talisman for ultra-low emissions. Due to a variety of film, composite technology and level, filter bag production, installation and other reasons, the quality is not stable enough, domestic film filter material in the initial use of the effect is very good, after a period of time easy to damage, abrasion, short life, need to continue to strengthen its mechanical strength, wear resistance, film fastness.

Ultra-dense surface layer diversification:From the original based on fine denier fiber laying to ultra-fine island fiber, nano fiber, wet laid, melt blown into the net, with needle or spunlace processing consolidation to the substrate, made of filtration efficiency and resistance close to the film filter material, reliability and life is better than the film filter material of the new products.

Spunbond filter material mechanical properties optimization and strengthening:The mechanical breaking strength of spunbond filter material is still low, especially the weft strength problem, and the spunbond process needs to be adjusted and optimized.

electrostatic enhanced filter material:In order to improve the efficiency, the dust particles are charged by adding a pre-charging device to enhance the collection efficiency of the filter material. In addition, the filter fiber is charged, the charged material is coated to form an electret, and the dust collection efficiency is improved by electrostatic attraction.

In addition, the application of spunlace filter material needs to be promoted, and the structure of filter material still needs to be optimized.

2.2.2Filter bag form change

Particulate matter emission standard from 30 mg/m³Down to 15 mg/m³10 mg/m³Even 5 mg/m³At present, the nonwoven carding and netting needle punching technology in filter cloth is close to the limit that can be reached.

pleated filter bag:The area of the pleated filter bag can be expanded by 30%~200%.

Felt Filter Cartridge:The felt material is hardened and discounted into a filter cartridge. Integrated with the skeleton design, the area is expanded by 3~4 times, the wind speed is significantly reduced, and the emission reduction effect is very good.

2.2.3New Filter Media

300The demand for ultra-high temperature gas-solid separation above °C is increasing, such as coal chemical industry, dust removal before out-of-stock, etc., prompting the emergence of new filter media.

ceramic tube/ceramic fiber tube:Its temperature resistance can reach above 1000 ℃ and has high efficiency. In the future, we need to make breakthroughs in cost, price and installation.

Metal filter material:The filter material made of sintered metal particles or fibers has the advantages of good temperature resistance, high filtration efficiency, and not easy to be damaged, but it is expensive, heavy, and has poor cleaning effect. It is used in some special fields of small-scale gas engineering.

3 Air purification and personal protection materials

Due to the influence of smog, the heat in the field of personal protective materials for air purifiers in China will not decrease in 2018. In 2018, the market size of air purification and individual protection filter materials was about 3.5 billion yuan, with a growth rate of 16% and a profit margin of 15%.

3.1 Material Innovation

In 2018, nanomaterials have become a hot spot, and the trend of nanofiber industrialization is obvious. Meltblown fiber filter materials at the nanoscale level have the ability to be industrialized, and meltblown filter materials are expected to usher in the fastest growth. The filter material formed by composite with melt blowing and needle punching can give full play to their respective advantages and has been widely used in various fields. The market is expected to usher in rapid growth in the future.

Among them, PP/PE bicomponent fiber web two-stage structure, including the process development of PPS melt-blown superfine fiber, using a micro-denier melt-blown fiber mesh, monofilament diameter 0.5~1.0 μm, in medicine, food and beverage and respiratory protection system has a larger application space.

3.2 new applications increased

The fresh air system of the building has two kinds of electrostatic filtration and HEPA filtration. In view of the ozone generated by the high-voltage electrostatic field, more schemes are inclinedHEPA filters are made by way of fresh air fans.

3.4Active in the field of personal protection

Individual protective masks, generally lower than the national standard of 90% of the minimum limit, domestic masks anti-haze efficacy situation is not optimistic.

4 liquid filter material

2018In, the market size of liquid filtration materials was about 4 billion yuan, with a growth rate of 18% and a profit margin of 20%. It has been fully applied in the fields of urban sewage treatment, drinking water purification, hemodialysis, aviation fuel filtration and toxic industrial chemical filtration.

4.1Review of Liquid Filtration

At present, the market is mainly woven fabrics, fiber bundles, knitted fabrics, three-way fabrics and woven fabrics and other traditional filter materials; meltblown non-manufacturing technology, electrostatic spinning, nanofibers and other applications to the non-woven filter material market continues to grow; electrostatic spinning on the diameter of 0.3 m particles below the filtration efficiency of up to 99.97%.

Membrane materials involved in a wide range of applications, can be used in building materials, energy conservation and environmental protection, medicine, electronics, food, transportation, energy, chemical and other industries. Among them, selective separation membranes used in the field of water treatment have been rapidly developed in the domestic and foreign markets.

4.2Membrane Technology and Development Status of Water Treatment

90% of reverse osmosis membranes in China are imported products, about 40% of ultrafiltration and microfiltration membranes rely on imports, and 50% to 70% of raw materials used to make membranes rely on imports.

Water companies in the United States, Japan and other countries have gradually penetrated into China, mergers and acquisitions, joint ventures or the establishment of independent subsidiaries. Anhui has introduced Japan's Kubota Company, which is engaged in the manufacture of membrane equipment, to carry out the production, research and development, sales and sewage engineering construction of MBR membrane equipment. Japan Toray and domestic enterprises jointly established Bluestar Toray Membrane Technology (Beijing) Co., Ltd. to introduce Toray's advanced membrane making and membrane rolling production technology and establish a complete production base for reverse osmosis products in China. Japan NOK Co., Ltd. and Tsinghua Tongfang established Tongfang NOK (Wuxi Membrane Technology Co., Ltd, improve the quality of the same water treatment products.

China's membrane industry has also entered a period of rapid growth. Membrane technologies such as microfiltration, ultrafiltration, and reverse osmosis have been widely used in seawater desalination, water treatment, sewage treatment and reuse. In the field of ultrafiltration membrane materials, China's technical level has been basically the same as the international level, the market share of foreign enterprises is gradually shrinking, the price has dropped greatly, and the competition is more fierce.

4.3New membrane materials and membrane technology

High-performance membrane materials can achieve highly selective chemical separation, and are expected to achieve more efficient and energy-saving applications in the petrochemical industry, water treatment, reverse osmosis desalination and other fields. The cross-linked network structure of the membrane is improved, and the separation of high flux, high selectivity and high stability is realized.

4.4 Prospect and Prospect of Liquid Filtration

After using plasma, flow etching, halo discharge and other methods to modify the surface of the melt blown nonwoven fabric, the filtration efficiency has been greatly improved. It is expected that innovations in nonwoven filtration materials and membrane technology in the next 20 years can more effectively desalinate seawater, and the future market demand is huge.

Membrane separation technology has been widely used in many fields, and large-scale application and promotion is the key development direction of polymer separation and filtration materials in the future.

Electrospinning nanofiber filter material has high specific surface area, porosity and permeability, but the mechanical strength is not high, the life is short, the stability of the fiber web needs to be further improved, the production is low, the cost is high also need to be further studied.

5Future development direction

The urgency of environmental governance has provided the industry with a golden opportunity for development, and enterprises in the industry should seize the opportunity to accelerate development. Overall, the overall situation of the industry in 2018 is good, but some problems need to be gradually overcome in the future.

2019In 2003, under the circumstances of insufficient economic growth momentum and increasing transformation pressure, the industry should continue to focus on integration and innovation, improving management level, shaping core competitive advantages, strengthening personnel training, and rational competition in honest management to form a standardized market system and improve Product quality stability, seize development opportunities, promote the strategy of going out, and take the path of international operation to promote the high-quality development of the industry.

(This article is taken from the 2018 work report of the China Association of Industry Filtration and Separation Textiles Branch)