I. Price
100 yuan per square. (Price source network, for reference only)
Second, the purchase guide
1, depending on the manufacturer
Dimming glass products belong to high-end glass products and can be called luxury goods in glass. Of course, we must choose products whose quality is commensurate with their price. At present, the processing history of domestic general dimming glass manufacturers is mostly less than 3 years, and there are few engineering cases (some manufacturers borrow pictures of engineering cases from each other for false publicity). Quality and reputation need time to verify, and you need to be more cautious when buying. To buy dimming glass products produced by well-known brands or manufacturers in the market, you can choose regular professional glass manufacturers (such as * * * * Glass Co., Ltd.) instead of trading companies, technology companies and other dimming glass sales agents or middlemen, so as to avoid potential risks and enjoy good quality and after-sales service.
2. Look at the technical parameters
For customers with strict quality requirements, it is necessary to know more about the technology of dimming glass.
A. Good quality dimming glass, with excellent light transmittance, clarity and transparency when powered on, beautiful appearance, light transmittance but light opacity when powered off, which can protect privacy extremely. Simple test method:? Put your palm on the back of the glass. When the power is off, look at the palm on the back from the front. Although you can see its vague back, you can't see the fingerprints of the palm. Or you can put an object 3cm away from the front glass, and it is better not to see the object from the back when the light on both sides is balanced and the backlight is not bright. The light transmittance of good quality dimming glass should be around 75%.
B for partitions, curtain walls, internal and external doors and windows used in toilets and bathrooms, and other non-indoor dimming glass, the manufacturer should be asked whether the interlayer of dimming glass is EN or PVB. PVB (polyvinyl butyral) has been used as interlayer for more than 30 years. The hydroxyl groups in the polyvinyl alcohol segment of PVB have strong water solubility and are sensitive to humidity, so using PVB requires more energy and the cost increases accordingly. The finished product processed by PVB has a high haze, which is generally above 10% and the light transmittance is less than 70%. In addition, due to its special chemical structure, PVB has poor tolerance to acetic acid, alcohols and ketones, and may even dissolve or soften, resulting in the loss of adhesion, and problems such as glue opening and degumming are prone to occur during construction. As an interlayer, EN (polyethylene-vinyl acetate) can avoid the above problems and has better light transmittance, so PVB interlayer is gradually updated all over the world. However, it is generally not recommended to use EVA film as the intermediate film or dimming glass between curtain wall glass and outdoor laminated glass. At present, there are almost no engineering cases of dimming glass used outdoors in international and domestic markets.
C consumers can choose to use the corresponding glass panel according to the functional requirements of glass in the application field. Generally speaking, the standard of dimming glass is higher than that of original glass, so automobile grade float glass is chosen as the base material of dimming glass. Most general manufacturers or new manufacturers will suggest using tempered glass as the base material of dimming glass, but the transparency and smoothness of tempered glass are not as good as float glass, which will lead to the phenomenon of degumming of dimming glass due to different tension.
D. In the selection of dimming glass under installation conditions, manufacturers with professional installation teams should be selected for installation. For hanging installation, try to avoid drilling. Because drilling holes in the dimming glass will change the arrangement order of molecules in liquid crystal film, the dimming glass will be burned during use. At present, some domestic manufacturers have mastered the advanced borderless hanging method, which effectively solved the problem of punching holes in the hanging installation of dimming glass.
3. Quality of dimming film
The quality of dimming film is one of the most important factors to determine the quality of finished dimming glass. Therefore, when buying dimming glass, it is necessary to identify the quality of dimming film of dimming glass manufacturers.
When we choose intelligent dimming glass, we must look at the manufacturer. The quality of intelligent dimming glass produced by different manufacturers is not the same. Now many manufacturers are making fakes, so we must look at the manufacturers and trademarks. In addition, when we choose intelligent dimming glass, we must look at the technical parameters. The technical parameters of dimming glass are very important, and the transmittance of high-quality intelligent dimming glass can reach over 70%. When you choose, you should also look at the quality of the dimming film. Dimming glass is usually pasted with dimming film.
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