3A Molecular Sieve Is the Key to Hollow Glass's Energy Saving and Safety

First, the hollow curtain wall glass has become a huge safety hazard
According to the report, on July 8, 2011, a curtain wall glass of the Qingchun Development Building at the Shuangling Crossing of Qingchun East Road, Hangzhou City, Zhejiang Province was suddenly dropped. Zhu Yiyi, a 19-year-old young woman just passing by, was in a scene. Terrible. Afterwards, according to the attending doctor, the wound on his left leg was more than 20 centimeters long, and the glass residue was almost all over the entire lower leg. It was like being bombed and broken, and it could not be repaired. Ultimately, only the amputation was possible. Hangzhou City Curtain Wall Association staff found that the building uses a hidden glass curtain wall, 21 layers of a window outside the glass is gone, but the adhesive silicone is very clean, preliminary judgment is the outer glass of this insulating glass The whole drop caused the tragedy.
Why does the hollow glass drop entirely? Does the hollow glass in the country have similar risks?
Experts in related industries indicated that there are two main reasons that lead to the detachment of insulating glass blocks: First, there is a problem with silicone sealing of the insulating glass frame, which makes the insulating layer of the insulating glass wet, which causes the frame to rust and the glass to fall off. The second is the insulating glass spacer. The layer is charged with a corrosive desiccant, which not only makes the interlayer wet, fogging, and frosting, but also causes corrosiveness to the bound silica gel of the frame, which eventually causes the glass to fall off. The Qingchun Development Building in Hangzhou uses a hidden glass curtain wall. The load of the hollow glass is mainly supported by the sealant. Once the sealant is in trouble, it will inevitably lead to the shedding of the hollow glass.
As we all know, the glass curtain wall is a distinctive feature of modernist architecture. It uses an insulating glass that is made of mirror glass and common glass and filled with dry air. It has the advantages of sound insulation, heat insulation, frost resistance, moisture resistance, and strong wind pressure resistance. .
According to statistics of the curtain wall engineering committee of the China Building Decoration Association for the past three years after the analysis of the national curtain wall market, the total construction area of glass curtain walls in China was approximately 165 million square meters in 2008, and the construction area of curtain walls in 2009 was approximately 236 million square meters in 2010. It reached 300 million square meters.
With the wide application of hollow curtain wall glass, the phenomenon of condensation, failure, and even total shedding of insulated glass throughout the country has increased in the three or five years. Only the high-rise building of Concord City in Shanghai has fallen within a year. Three times "glass rain". According to industry sources, the source of the problem lies in the quality of insulating glass.
At present, the market for insulating glass of silicone structural adhesive is generally used for more than 20 years. If it is corroded or damaged, it is difficult to say if it can reach this figure. Once the whole glass falls off, the consequences will be fatal. The most serious problem is that buildings with hollow glass curtain walls are mostly located in downtown areas with large people flow. They are invisible and have greatly increased the probability of wounding. The hollow glass curtain wall has become a huge security risk.

Second, how to prevent the deadly "glass knife" hanging on the head? What are the market surveillance mechanisms?
The hidden danger of an insulating glass curtain wall is like a "glass knife" hanging over people's heads, threatening people's life safety at all times. How can we prevent this "glass cutter" from hanging over people? For this reason, the reporter interviewed Liu Anfeng, general manager of Shandong Zibo Green Energy Chemical Co., Ltd.
Zibo Luneng Chemical Co., Ltd. is a high-tech enterprise specializing in the production of hollow glass desiccant, 3A molecular sieve, with a monthly production capacity of over 400 tons and an annual output of 5,000 tons. The company has always strictly implemented the ISO9001 quality management system standards, the company's products have reached EN1279 standards and the European insulating glass authoritative testing agency IFT certification, best-selling products in Britain, France, Germany, Italy, Russia and more than 60 countries.
According to Mr. Liu, hollow glass is a component made of four major types of raw materials such as glass substrates, sealing materials, spacers, and desiccants. Therefore, the quality of selected raw materials will directly affect the performance and quality of hollow glass products. The purpose of adding the hollow glass desiccant is to suck the moisture of the hollow glass cavity clean, so that the air in the glass cavity is kept dry, which plays a central role in the lifespan and energy saving effect of the hollow glass.
What are the special features of "Green Energy" 3A molecular sieve desiccant?
In this regard, General Manager Liu Anfeng proudly stated: “The 3A molecular sieve produced by our company is used as a special desiccant for insulating glass and can continuously absorb the water and residual organic matter in the insulating layer of the insulating glass in a continuous manner, effectively preventing condensation and frost formation of the glass and thoroughly solving the problem. The hollow glass suffers from twisting and crushing caused by expansion or shrinkage, which ensures the service life of the hollow glass is at least 20 years, and its effective adsorption capacity is 20 times that of the clay-based hollow desiccant, and its average service life is 8 times that of the 4A molecular sieve desiccant. , In compliance with all national performance specifications, 3A molecular sieve is the ideal hollow glass desiccant."
"However, in recent years, China's hollow glass desiccant production market is relatively confusing, and some manufacturers do not strictly comply with relevant standards in order to reduce production costs. Some manufacturers even use 4A molecular sieves to impersonate 3A molecular sieves. These counterfeit and desiccant desiccants are flooding. Seriously threaten the quality of insulating glass." Liu said reluctantly.
According to investigations, at present, a large number of hollow glass products produced by domestic hollow glass companies are "corrosive". The "corrosiveness" of these hollow glass materials refers to the use of a desiccant with severe corrosion in the hollow glass spacers. According to market estimates, the total amount has reached more than 50% of the total market, which is more than 500 million square meters. There are some economically under-developed regions, which even occupy the entire local market.
What is this corrosive desiccant? It is a clay-type desiccant containing calcium chloride. Although the clay-based desiccant has never publicly declared that it contains such a component, in fact, the desiccant plays a major role in calcium chloride, not clay. The pure clay desiccant itself is not strong in water absorption, but the adsorption rate can be increased after calcium chloride is added. When the temperature reaches 30°C, calcium chloride will form crystal water dissolved in itself, and the solution calcium chloride at this time will show strong corrosiveness. It first corrodes the metal-made hollow glass aluminum strips, and secondly it erodes the sealant and destroys the adhesiveness of the hollow glass. In addition, the solution also has certain corrosivity to the low-emissivity glass coating plated with a silver film. Estimated.
We can't help but ask: How is counterfeit and desiccant so flooded and what is the market's supervision mechanism?
The specifications of the hollow glass desiccant in the appendix of “Insulating Glass Production Regulations” have a clear stipulation that the hollow glass desiccant must use 3A molecular sieves, and the certified insulating glass desiccant in the national safety glass product compulsory certification (ie 3C certification) is also 3A. Molecular sieves. Since the industry standards have been issued, why can't we guarantee the quality of insulating glass?
Liu Zong calculated for the reporter: “The use of 3A molecular sieves as desiccants for architectural hollow glass costs 7 cents per square meter, but if clay desiccants are used, the cost per square meter is only 3 or 4 cents. Many developers are seeing profitability, so when they choose their partners, they put prices and light weight on them, eventually leading to unfair competition in the desiccant market."
“It is understood that the new standard for insulating glass in China has been basically determined, and it is necessary to ensure the service life of insulating glass for more than 15 years, and from the perspective of US experience, most of them have exceeded 30 years. In comparison, our domestic standards are not low. It is necessary to know that for architectural insulating glass, the useful life of less than 15 years will lose its energy-saving value, so we are eager to see that the relevant industry departments of the country can improve relevant industry laws and regulations, strengthen market supervision, and thoroughly purify the hollow glass. The glass desiccant market fundamentally solves the problem of the quality of insulating glass! "Here, Liu always seems excited.

3. Call for national policy support to provide effective protection for the energy saving and safety of insulating glass
At present, hollow glass has been listed as an energy-saving glass by the National “Building Energy Conservation Engineering Construction Quality Acceptance Specification” because it can block the energy loss of doors and windows. However, due to the counterfeiting of hollow glass desiccants on the market, many insulated glass needs to be replaced within seven or eight years. If you do not replace it, it will not only fail to achieve any energy-saving effect, but will also result in greater energy waste.
With the popularity of insulating glass, the country needs to spend billions of dollars each year to replace the hollow glass. It is like building a house that is unsatisfactory, a few years later it will be demolished, rebuilt, demolished, and demolished. Such a vicious cycle will directly impede the implementation of the national energy conservation strategy.
According to the statistics of the Ministry of Housing and Urban-Rural Development in 2010, China’s building-related energy consumption has accounted for over 46.5% of the total energy consumption of the entire society, and it has been increasing year by year. About 65% of this energy consumption belongs to building operation energy consumption. These energy consumption are Dissipated through doors and windows, it accounts for about 30% of the total energy consumption of the entire society.
Liu cited an example: "A German house (about 100 square meters) uses only energy-saving glass, insulation walls and other measures, and only consumes 5 euros a year."
In this regard, Mr. Liu confidently said: “Insulating glass is a kind of energy-saving products with excellent prices. 3A molecular sieves play a more central role in the lifespan and energy-saving effect of insulating glass. Although the domestic level of insulating glass industry has not yet reached the level of International level, but according to our technology, more than 80% of energy lost through doors and windows can be completely saved."
Finally, General Manager Liu Anfeng earnestly called for: “I hope that the building management department of China’s building industry can give support to 3A molecular sieve desiccant related policies, introduce new industry standards as soon as possible, and increase the implementation of standards; related industry associations should also stand in the national energy-saving At a high level of environmental protection, we have broken the boundaries of the industry and produced truly long-life glass. This is a kind of social responsibility for the realization of the safety and energy saving of insulating glass used in the construction of our country's architecture. This makes him in such an unfair competitive environment. Next, we still stick to our promises.
Now that China's national economy is growing at a rapid rate and urban and rural consumption capacity has increased dramatically, saving energy has become a major issue that affects the socio-economic development of sustainable development. The regulation of hollow energy-saving glass industry directly affects the effectiveness of the national energy-saving strategy.