Analysis of the development status and trends of exterior wall coatings

The rapid development of the Chinese furniture industry for more than 20 years has ended after the global financial crisis in 2008. With the export companies turning to the domestic furniture market and the inflow of high-tech talent and capital, the industry has entered a painful shuffle. At the same time, with the stable quality, excellent design and high environmental performance, the brand team of the furniture industry has formed.

1. The types and functions of exterior wall paint are painted on the exterior wall of the building to protect and decorate the external wall of the beautiful building, so as to achieve the purpose of beautifying the urban environment, decorative materials are external wall coatings. Because it is painted on the facade of the building, the most important indicator as an exterior wall coating is the need for anti-ultraviolet radiation, and it requires no prolonged exposure to discoloration. This is an important feature that interior paint does not have.

In addition, the function of exterior paint also needs to include:

1) Good decoration: The outer wall paint is required to be rich in color and excellent in color retention, and can maintain the original decorative performance for a long time.

2) Good weather resistance: The exterior wall coating is exposed to the wind, sun, salt spray corrosion, rain, cold and heat changes due to the exposure of the coating to the atmosphere, under the long-term repeated effects of these external natural environments. The coating is prone to cracking, pulverization, peeling, and discoloration, which causes the coating to lose its original decorative protection function. Therefore, it is required that the coating should not have these damages within the specified service life.

3) Good stain resistance: Due to the large differences in environmental conditions in different regions of China, for some heavy industries and developed mining cities, due to the presence of dust and other suspended materials in the atmosphere, the vulnerable stain coating will lose its original The decorative effect affects the appearance of the building. Therefore, the exterior wall coating should have good stain resistance, so that the coating can be easily cleaned after it is not easily contaminated or contaminated.

4) Good water resistance: Exterior wall paint finishes are exposed to the atmosphere and will often be washed by rain. Therefore, exterior paint coatings should have good water resistance.

5) Good mold and denaturation: Exterior wall paint finishes are easy to grow mildew in wet environment. Therefore, the coating film is required to inhibit the growth of mold and algae.

In addition, according to different design requirements, exterior wall coatings also have higher requirements: such as fire protection. Paint applied to the exterior walls of a building must have properties that reduce the flammability of the building's surface and retard the spread of fire, in order to increase the fire resistance of the building's surface. Such as isolation noise. In addition, it also includes: In various exterior wall thermal insulation system coating applications, the external wall coating is required to have a good elastic elongation, in order to better adapt to the cracking of the surface layer due to the deformation of the base layer, and the fineness of the base layer. The cracks have a covering effect; for exterior wall coatings with aluminum-plastic-plastic panels, they should also have better metal texture and long outdoor durability.

2, the characteristics of the external wall coating For a long time, China's external wall decoration materials are mainly tile, for reasons of security and other factors, in recent years, the external wall coating was widely used. Therefore, when it comes to exterior paints, they are inevitably compared to ceramic tiles.

Tiles are a bit obvious: good corrosion resistance; good fire resistance; variety of types, high selectivity; long service life; emphasis on the overall mix of effects, and better construction support. However, there are safety problems in pasting tiles, and the construction method is relatively complicated. Therefore, the construction efficiency of the tiles is low, and the construction speed is slow. This is also the obvious shortcoming of tiles, especially the safety issue, which has always been its bottleneck.

Although the service life of exterior paints is not too long compared to ceramic tiles, exterior paints have their own unparalleled advantages:

First of all, the low price is the most prominent feature of exterior paint. In exterior paints, 70% to 80% of the ingredients are fillers or water, and the cost is low. Moreover, the construction of the paint is convenient and the labor cost is relatively low. The total cost per square meter of the external wall coating is about 50 yuan, which is generally lower than other exterior wall facing materials.

Second, there are many types of exterior wall paints and their performance is abundant. External wall paint has flexible exterior wall paint, sand wall exterior wall paint, real stone paint exterior wall paint, multi-layer pattern exterior wall paint, synthetic resin emulsion thick paint and imitation metal curtain wall paint (metal paint), etc., with rich expression.

Third, the construction speed of outer wall coating is high and the efficiency is high. The construction cycle can be shortened, and the construction features are convenient.

Fourth, exterior wall paint finishes are characterized by bright colors, light weight, no “light pollution” and no radiation. Its bright colors can meet the modern multi-element design style, while light weight is not easy to fall off the whole block, even if it falls off will not cause major accidents.

Fifth, environmental protection. With the acceleration of urbanization, high-rise buildings have risen and many buildings have been decorated with glass and mirrors to enhance the appearance of the building and are easy to clean. However, the glass curtain wall is the source of the greatest light pollution, and the light pollution caused by the refraction of the glass curtain wall is also very harmful. The glass curtain wall has strong concentrating and reflecting effects. The glare of the sun's light beam is enough to destroy the photoreceptor cells on the retina, affect people's vision and cause negative impact on the human body and the ecology. In the problem of reducing the light pollution of the glass curtain wall, some analysts believe that more paints can be used as needed during the construction of the building, and less use of curtain wall design. The use of architectural coatings instead of glass curtain walls and ceramic tiles can achieve the goal of reducing the white light pollution of glass curtain walls. Such as exterior paint fluorocarbon paint and traditional paint coatings, compared with excellent light and weather resistance, can replace the glass curtain wall to reduce urban light pollution.

3. Development status The building exterior wall decoration materials have long been dominated by tiles, mosaics, marble, curtain walls, and clay bricks. Coatings only account for a small part. Compared with the use of paints in more than 80% of exterior wall decoration in developed countries, there is a large gap. For this situation, industry analysts pointed out that the main reason is that the quality of the domestic coating is low, the use of 2-3 years, loss of light, fade, peeling, peeling, pulverization and other aging phenomena, seriously affecting the decorative effect of the external wall At the same time, the low-price bids of many development companies have also led to the incorporation of low-quality paint into the market, which has affected the development of the entire industry. Although the current situation is worrying, the brand enterprises in the coatings industry are still working hard to guide the market.

In recent years, China has completed construction of an area of ​​about 3 billion square meters. Real estate investment in 2012 was 7.18 trillion yuan, an increase of 16.3% from 2011, and the growth rate has dropped. The average annual growth rate from 2002 to 2012 was 24.9%.

In addition, under the macro-control of the central government, on the one hand, the construction of social security housing will increase, which will be a good factor for middle and low-grade building (exterior wall) coatings; on the other hand, it will impose a 20% limit on purchases, limited loans, and purchases of commercial housing. Personal income tax, etc., also have a certain influence on the development of architectural (outer wall) coatings. From January 2002 to January 2013, the growth rate of investment in real estate development in the country has been declining and surging at 15%. In January and February 2013, the year-long slump ended. It rose to 22.8%.

During the period from 2002 to 2012, both the government policy level and the technical aspects of architectural coatings have been favoring the development of architectural coatings, so the share of architectural coatings in building decoration materials has gradually increased.

According to relevant statistics, in terms of the world's external wall paint market, the annual growth rate of exterior paint is 7%, which is higher than the average development rate of 5% of the exterior paint industry.

In the United States, exterior paint accounts for 52% of paint output, Italy 57%, Germany 55%, France 55%, and Japan 40%. External wall paint is the largest category of external wall paint in developed countries. In the United States and other developed countries, per capita consumption of exterior wall coatings is more than 10 kg, while China is still less than 1 kg.

In developed countries, exterior wall coatings are used most often for interior and exterior wall decoration. The external walls of Western European countries are almost entirely decorated with exterior paint. In the United States, 70% of the exterior walls of buildings are decorated with exterior paint; over 85% of the exterior walls of residential buildings in Singapore are decorated with exterior paint. In addition to the extensive use of exterior paints in developed regions such as Europe, America and Japan, Thailand's exterior wall paints have already accounted for 50% of the decoration.

The original foundation of our country's architectural coatings was poor. After years of efforts, we began to embark on a path of development from a single variety to a variety of products and from a low-grade product to a middle-grade and high-grade product through systematic and confident development of research and development and the introduction of foreign production and technology. At present, an industrial system with a certain scale and grades has been formed. However, compared with the industrialized countries, the application of paint in the exterior wall decoration of our country is lower than the listed ones, which is about 10%-15%. The application in high-rise buildings has only just begun.

The cost of exterior paint is so low. Why does exterior paint fail to spread? According to related surveys, the main reason why exterior paints are not accepted by people is that the concept of consumer spending is “work”. Many consumers think that compared to decorative materials such as external wall tiles and glass curtain walls, Exterior paint is obviously not enough grade. In many people's minds, the more high-end districts, the more magnificent the external walls of the building are, with granite, marble, useful tiles, and even glass curtain walls. The lack of understanding of the disadvantages of rigid exterior wall decoration materials, as well as the outdated and outdated psychological aesthetic concepts, have caused the current status of China's exterior wall coating applications.

At the same time, due to the extremely irregular development of the exterior paint industry in the early years, the paint production enterprises of outer walls are mixed, and some low-grade and low-grade exterior paints have been very disappointing to builders, resulting in good prospects for paints for exterior walls. However, there is no good reputation, so that the exterior wall tiles and glass curtain walls that should have been withdrawn from the mainstream market are making a comeback and occupy the market share of exterior paints.

4. The policy promotes the development of exterior wall paints. For many years, exterior wall bricks have developed into the main materials for building exterior wall decoration by virtue of their own numerous advantages. However, with the increase in the number of years of use and improper construction, many exterior wall tiles have fallen out. Falling news triggered people's panic. At the same time, it was able to make up for the fallout of exterior paints.

On January 19, 2013, a shop owner in Quanzhou City, in the building’s external brick wall, sent 6 needles to the wall. There have been a number of tiles falling out and wounding incidents in this community.

On January 5, 2013, a woman belonging to the Diaoshan County, Shaanxi Province was killed by a tile block falling on the 5th floor.

One night in late 2012, there was a great wind, and a small high-rise wall tile from a certain district in Dalian fell off. Downstairs eight cars "invited", one of Mercedes-Benz windshield, the top cover was completely damaged by the impact.

On the evening of December 22, 2012, a tile on the external wall of a building suddenly fell off, breaking three cars parked downstairs. A car owner stayed in the car and escaped.

On December 15, 2012, the tiles on the external walls of a community building in Chongqing's Dianjiang County fell off, leaving women passing by and falling in a pool of blood on the spot.

For reasons of public safety, although there are no mandatory regulations for the time being on the national level, many cities have issued corresponding regulations prohibiting buildings from using external wall tiles through administrative measures.

Chongqing: From October 1, 2006 onwards, buildings with more than 20 floors or a height of more than 60m will be prohibited from using external façade bricks on the external walls of buildings (except floor coverings or exterior wall cladding materials) with pedestrian traffic or crowded traffic.

Tongren Prefecture, Guizhou Province: Starting from June 1, 2008, all new construction, renovation, construction, and construction projects within the urban planning area of ​​Tongren City will be prohibited from the use of tiles on the external walls of the building. Use wall paint and exterior wall decoration materials instead.

Dalian: It is forbidden to use bricks and tiles on the external walls of high-rise buildings.

Shanghai: Since January 1, 2000, the design and construction drawings and construction projects that began on April 1, 2000, should promote the use of exterior wall coatings, limit the design and use of external wall tiles, and prohibit the design and use of mosaics. Such as exterior wall porcelain veneer material, but the underlying or podium exterior wall covering materials.

Liaoning: Starting from July 1, 2000, the use of mosaic veneers on the external walls is prohibited. Except for the ground floor or the podium, the projects that restrict the design and use of wall tiles, require exterior veneer tiles, and hang marble shall be submitted to the Municipal Construction Commission for review and safety inspections shall be conducted periodically. Promote the application of excellent, environmentally friendly exterior wall coatings.

Anhui: Since January 1, 2003, new construction, reconstruction, and expansion of various types of residential construction, industrial construction, public buildings, and village and town construction and other construction projects, should give priority to the promotion of the application of exterior wall coatings, limit the design, use of external wall tiles It is forbidden to use exterior wall porcelain veneers such as Masek (except floor or skirt exterior wall veneers).

Quanzhou, Fujian Province: From September 1st, 2000, ceramic tiles and mosaics that restrict the use of exterior wall decorations and energy-consuming and unsafe are promoted and applied to architectural paints.

Jiangsu: Mosaics are not allowed on exterior walls of buildings, and ceramic tiles are used on exterior walls of residential buildings.

Xi'an: Starting from September 1, 2011, all types of new construction, reconstruction, and expansion of civil construction projects, refer to the National Building Standards Atlas “External Exterior Insulation Construction Structure” (10J121), where the external walls of the building are covered with a thin insulation board. For those who use an external thermal insulation system, it is forbidden to design and use porcelain facing bricks for exterior wall decoration, except for those below 3 floors (including 3 floors) or podiums.

to sum up:

The past decade has been a golden period for the rapid development of real estate in China. Tens of thousands of buildings have been produced in the past decade. The service life of exterior wall coatings is between 10 and 15 years. Therefore, from now on, there will be a very large number of buildings that need to be renovated. In addition, party committees have started to implement and implement new policies concerning the construction of new rural areas and the construction of affordable housing in the 12th Five-Year Plan period. There will be a greater demand for architectural coatings including exterior coatings.

In addition, along with the gradual standardization of China's exterior paint market, external wall coating technology continues to advance, and the trend of waterborne coatings and environmental protection will inevitably become inevitable. The comprehensive promotion of safety and environmental protection for exterior wall coatings is a general trend. Whether from the aspect of safety, cost, construction, or the overall decorative effect to environmental protection and energy conservation, the safety and environmental protection of exterior coatings will evolve more and more perfect.

Therefore, there is reason to believe that the exterior paints that are responsible for beautifying the city’s important tasks will, with the passage of time, technology, and society’s promotion, be given a new round of development.