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[China Glass Network] With the continuous improvement of people's awareness of energy conservation, insulating glass is expanding with its excellent heat insulation and sound insulation properties, market demand and application fields, and it is hollow in the fields of home decoration, building doors and windows, curtain walls, vehicles, home appliances, etc. Glass is used in large quantities. It is undeniable that many users have lost the theory of quality evaluation of insulating glass products. Many inferior insulating glass products are flooding the market. These inferior insulating glass have short life, poor energy saving effect and poor appearance. Insulating glass serves the purpose of energy saving and efficiency.
High-quality insulating glass, on the one hand, good energy-saving effect, on the other hand, durability and sealing life is long. If the insulating glass has good energy-saving performance, but the durability and sealing life are short, it is also a low-grade insulating glass. Conversely, if the insulating performance of the insulating glass is good, but the durability and sealing life are short, it is not what we want. High quality insulating glass should have both good energy saving and long sealing durability.
For the identification of the quality of insulating glass, it should be carried out from the following two aspects: supporting materials and process quality. At present, most of the insulating glass on the market adopts the double-pass sealing process. For the double-pass sealed insulating glass, the supporting materials include: glass, metal spacer (or composite strip), and the front adhesive sealant (butyl) Glue), the second adhesive sealant (polysulfide rubber, silicone rubber or polyurethane glue), desiccant (molecular sieve), connecting parts. The quality of the process mainly includes: the quality of the front seal, the quality of the second seal, the corner and the quality of the interface. For the determination and evaluation of the quality of the process, we should determine a premise that no matter which seal has a problem, the insulating glass seal will fail.
Observe the overall appearance quality of the insulating glass
To distinguish the quality of hollow glass, we must first observe the overall appearance quality of the insulating glass. The observation of the appearance quality mainly includes the appearance quality inside the insulating glass, the quality of the inner and outer sheets, and the misalignment of the inner and outer sheets. occur. The appearance quality of the hollow spacer strip.
1. The appearance quality inside the insulating glass
The hollow glass is placed under good natural light or under sunlight to observe the cleanliness inside the hollow glass. It is clean and free of impurities. The interior of the insulating glass must be clean and bright and free of impurities. If the internal cleanliness is poor, dust is present. And impurities can be judged as unqualified products.
2. The quality of the inner and outer sheets of glass
Firstly, the edge of the inner and outer sheets of glass is inspected. The inner and outer edges of the glass cannot have obvious shell-like (greater than mung bean) edge. If the glass is required to have a certain strength and is safe, it is better to use. The inner and outer sheets of glass are all tempered glass; secondly, the thickness of the inner and outer sheets of the hollow glass is selected. The choice of thickness depends on the area and size of the hollow glass, and the larger glass should be thicker.
3. Inner and outer combined quality
There is no misalignment in the hollow inner and outer sheets, and the edges should be neat, and no obvious misalignment is allowed.
Inspection by front seal
There are generally two types of sealing methods in front. One is to seal the inner and outer sheets of glass with a composite strip. The composite strip is a support skeleton (wavy aluminum strip) and a sealant (butyl rubber). One is to use a metal spacer frame, the molecular sieve for drying is injected into the spacer frame, the butyl rubber is coated on the upper and lower surfaces of the metal spacer frame, and then the inner and outer sheets of glass are bonded and sealed. The butyl rubber used in the front seal is a more effective barrier to prevent water vapor transmission. The inspection of the front seal mainly includes: the coating quality of the butyl rubber on the upper and lower bonding surfaces of the metal spacer frame, and the appearance of the spacer strip. Quality, corners and interfaces.
1. Coating quality of butyl rubber on the upper and lower bonding surfaces of metal spacer frames
Butyl rubber plays a vital role in the sealing of insulating glass. butyl rubber has a low water vapor transmission rate and a high bonding strength, and is a relatively effective barrier for bonding inner and outer sheets of glass and blocking moisture. It can also be heat-resistant, ozonized, chemical, and has shock absorption and insulation properties. If the metal spacer frame is used for the insulating glass, the coating quality of the bonding surface of the spacer frame should be checked to ensure that the butyl rubber on the bonding surface of the metal spacer frame does not break, and if there is a broken wire or uneven coating, It can be directly determined that the hollow glass is a defective product.
2. The appearance quality of the spacer
For the insulating glass using the metal spacer frame, the metal spacer frame is required to be free from distortion and distortion. The linear portion of the spacer frame should be kept straight, and the arc portion should be smoothly rounded. For the insulating glass with the composite rubber strip as the interval, the rubber strip should be flat. Straight round and no creep occurs.
3. Corners and interfaces
Regardless of the insulating glass of the composite strip or the empty glass in the metal spacer frame, the seal failure is mainly present at the interface of the spacer frame. For the insulating glass of the composite strip, the corner is required to be clear, the interface is only one, the inspection interface should ensure the sealing at the interface; for the empty glass in the metal spacer box, it is better to use the continuous bending type only one interface of the insulating glass, if the metal The corners of the four corners of the spacer frame are all connected by a continuous angle, so the hidden danger of the seal failure is much higher than that of the hollow glass with only one interface. In order to effectively check the sealing effect at the interface, you can use a blade to cut the second sealant at the corner of the joint to see if there is enough butyl rubber at the continuous corner for effective wrapping. If there is no connection at the corner Sufficient butyl rubber for effective wrapping indicates that the insulating glass life will be low.
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