[China Glass Net] Insulating glass doors and windows are gradually becoming the new darling of door and window products for home decoration with its excellent insulation and sound insulation effects. But as long as you go shopping in the building materials market, people will find that there are many kinds of hollow glass doors and windows. Although the appearance is white plastic steel frame, middle trim strip and glass, the price is divided into three or six, etc., from 200 yuan / square From rice to more than 1,000 yuan / square meter, dazzling, consumers are also difficult to choose when purchasing, then, how to choose hollow glass? China's curtain wall network editorial department, through the product library of hundreds of glass brands and Thousands of glass products are screened and analyzed, summarizing the following three aspects, identifying the cheats of true "fake" insulating glass, and sharing the skills of five kinds of express quality to distinguish the quality of insulating glass:
First, is the glass sealed. The true insulating glass consists of two layers of glass, surrounded by a high-strength, high-air-tight composite adhesive to seal the glass with the sealing strip and the glass strip. The sealing performance is superior, and many pieces of glass of the false insulating glass door and window are used. It is bonded with a black PVC foam strip and does not actually have a sealing effect.
Secondly, there are 6-9mm air layers in the middle of the two glass of insulating glass, aluminum spacers at the bottom, aluminum vents have a lot of venting holes, the air layer is filled with dry gas, and the frame is filled with desiccant for absorption. The moisture in the gas prevents the “fog†condensation after the glass doors and windows are heated, so as to ensure the dryness of the air between the glass sheets, while the fake “hollow†glass with poor quality does not have these devices, and it will be in half a year or After a longer period of time, internal fogging can occur and it cannot be cleaned.
Later, the sound insulation effect of doors and windows was tested in the field. Because of the characteristics of a certain cavity in the hollow glass, it has a relatively good thermal insulation effect, so it is widely used in northern cities. In terms of sound insulation performance, high frequency noise (such as voice, tweeter, etc.) in insulating glass has good sound insulation effect, but the effect of low frequency noise (such as bus engine noise, train noise, aircraft noise, etc.) is not obvious. Because the air cavity of the insulating glass will resonate with the low frequency noise of the outside in the low frequency region, the low frequency noise is relatively easy to enter the room through the glass. Of course, the sound insulation effect of fake "hollow" doors and windows is very general, and almost no insulation performance.
The industry has given five tips for identifying the advantages and disadvantages of insulating glass doors and windows:
First, the identification of the quality of the profile
High-quality profiles, from the appearance of the oxidation film surface smooth and fine, smooth and clean, pure color, no discoloration; no bubbles, smooth line, broken surface silver, no hair, weight; corrosion resistance, good rigidity, long-lasting Durable, then the choice of profiles should be judged from the following aspects:
1. See if the materials meet the standard: high-quality insulating glass doors and windows use high-quality profiles, such as domestic well-known Jianmei profiles, Weichang profiles, alumina profiles, Haomei profiles, etc., while inferior insulating glass doors and windows use low-grade Profiles, such as "slimming" products, the current profile on the market is only 0.6mm thin (according to national standards for the wall thickness of aluminum profiles, the profile wall thickness is 1.2 ± 0.23mm, tensile strength should reach 157N per square millimeter The yield strength should be 108N per square millimeter, the thickness of the oxide film should be 10μm, if it is not up to the above standard, it is regarded as inferior aluminum profile), and even the secondary recycling profile with moving hands and feet (appearance is well-known profiles) The film is shodded).
2. Look at the fineness of the appearance: the surface protective film has no obvious scratches, no aluminum chips, burrs, oil spots or other dirt, no obvious color difference between adjacent members, no adhesive on the joint at the joint, small dimensional error of the door and window frame, welding place There is also no break-opening phenomenon; the hardness is sufficient, and the surface of the profile is not broken by the hammer. The inferior profile processing is shoddy, and the saw is processed by sawing. The cut surface is extremely uneven, the color is uneven, there are bubble impurities, the hardness is poor, and the hammer will be broken when hit by the hammer, even if it is pinched by hand.
3. See if the use is convenient and safe: the installation of high-quality aluminum profiles is exquisite, the components are firmly connected, the doors and windows are opened flexibly, and there is no blockage or rebound phenomenon. When the doors and windows are closed, the bead is tightly closed, and the joints between the frame fans and the joints are not obvious. In addition, the quality of the hardware directly affects the performance of the door and window.
4. See if the manufacturer is formal: At present, there are many large and small factories that process aluminum profiles on the market. The quality of aluminum profiles produced by unknown small factories or workshops is definitely not guaranteed, and frequent failures occur during use. The security risks are huge. Therefore, the choice of regular manufacturers is the effective guarantee of quality, the manufacturer has a production license, the obvious parts of the product have signs, such as the name of the factory, trademark, product name, model, date of manufacture.
Second, the steel lining installed in the profile also has a quality difference
In order to enhance the rigidity of the profile, the steel lining (reinforcing rib) needs to be filled in the cavity of the profile exceeding a certain length. The state clearly stipulates that the steel lining inside the door and window sill is not less than 1.2 cm thick, and the thickness of the good inch steel is 1.2 mm. Above, the steel lining used for inferior profiles is often not thick enough. Most of the market is 0.9 cm, and some even use recycled scrap iron, gasoline barrels or wood. In this regard, some of the person in charge of the processing point swears that the steel lining does not need 1.2cm, the quality is the same, this kind of words will mislead many consumers, after all, most consumers are not expert, often will be suspiciously consumed. But in fact, if the steel lining does not reach the standard, the profile will inevitably be deformed for a long time.
Third, the profile also has multiple chambers and a single cavity
The multi-cavity profile consists of a main cavity (mounted steel) and a number of small cavities. The insulation and drainage performance is good, and the single-cavity profile does not have the consideration of insulation and drainage.
Fourth, the glass quality distinguishes qualified products
The difference in glass quality is relatively small, the surface is flat, free of impurity bubbles, radio scratches and fog spots, and some types of defective glass will be deformed during use, reducing its transparency, mechanical strength and thermal stability. For high-quality glass such as Grant, consumers can observe the glass from the side, the glass is flat, there is no color difference, and the article is seen through the glass, and the article is not deformed, which is a qualified product. Since the glass is a transparent object, the quality can be basically identified by visual inspection at the time of selection.
Five, the quality of the identification of hardware accessories
The identification of hardware accessories to see the quality of hardware accessories, high-quality brand hardware, such as Jianlang, Hehe, Chunguang, Lixing, foreign HOPPE, Gaelic hardware, etc. are trustworthy brands, help to judge the hollow glass doors and windows Metal materials such as hinges and door locks should be treated with anti-corrosion treatment, such as galvanizing, chrome plating, spraying, or stainless steel. For hinges, etc., it is necessary to adopt a design that can prevent deformation of doors and windows; door locks should use multi-locking door locks with good anti-theft effect; inferior hardware fittings will greatly reduce the quality of the whole door and window, and the door and window switches are not free, and the sealing performance is poor. If the frame is not standardized, the connection is not strong. When strong winds and external forces are encountered, the glass may be squeezed or even the hollow glass may fall off or burst, and the consequences are very serious.
Nantong Otter Textile , https://www.ottertextile.com