QINGDAO JUNHENG EQUIPMENT MANUFACTURING CO,.LTD
Several methods to identify the quality of door and window sealing strips
Release time:
2022-07-21 16:54
Source:
The actual key to doors and windows is sealing, and the sealing strip plays a crucial role. The materials used for sealing strips in the market are generally modified.PVCThe key role of soft materials is the quality of the added plasticizers.PVCWith the continuous rise in prices of various petrochemical products, the prices of rubber products such as sealing strips are also increasing. There are often some irresponsible manufacturers who only focus on short-term profits, starting to use raw materials.(The so-called cutting corners, counterfeit products, using waste engine oil, oil-based residues from refineries, etc.)They begin unfair competition by replacing high-quality plasticizers, bringing huge hidden dangers to consumers. In the entire manufacturing process of doors and windows, the cost of sealing strips only accounts for a small proportion, but their role cannot be ignored. There are several methods to identify the quality of door and window sealing strips.:
1. There is an oil leakage phenomenon on the surface. Waste engine oil is completely incompatible.PVCThe surface of the sealing strip is prone to grease, and the surface of the profile may also have yellow stains. It is neither environmentally friendly nor does it have many volatile substances that pollute the air.
2. When those so-called plasticizers volatilize or leach out, the sealing strip will lose its original softness, become very hard, and accelerate aging and shrinkage, resulting in larger gaps in the sealing part of the doors and windows, thus failing to achieve the sealing purpose. The performance becomes very poor.(Leakage, dust leakage.)Especially the steel reinforcement inside plastic steel doors and windows will be quickly corroded. Many users often find that during the rainy season, a large amount of red liquid flows out from the beaded part of the window. If the lining is corroded too early, it will greatly reduce the service life of the doors and windows.
In the actual production process, the input of sealing strips only accounts for a small proportion, but their role cannot be ignored. Therefore, there is no need to choose those counterfeit products to reduce costs. The identification method is very simple.
1. If there is an odor, smell it with your nose. Ordinary materials will have a slightly rich aroma, which is almost negligible.PVCTry to wrap the sealing strip around the profile and place it in a high-temperature area.
2. On the roof or in a sunny place.(Check if there are stains or discoloration on the contact surface between the profile and the sealing strip, and whether the surface of the sealing strip has dust or yellowing.)Grease stains are easy to absorb.(Check if your hands are dirty; if the above situations occur, the material of the sealing strip may be of poor quality.)Some cheaper sealing strips have a lot of fillers, so the surface will not be very glossy; those that are cheap and not glossy are undesirable.
3.Look at the specific gravity, how many meters can be produced per kilogram. Many manufacturers have made great efforts in using fillers.
4. To achieve the goal of increasing production and saving electricity,(they use talcum powder, heavy calcium, etc. as fillers, greatly increasing the specific gravity of sealing strip products.)We users generally buy by kilogram and use by length.(This invisibly increases costs rather than losses. The sealing strip with heavy calcium will show a small amount of white powder after being stretched back and forth a few times.)这在无形中增加了成本，而不是损失。加重钙的密封条，用手来回拉伸几次，表面就会出现少量白色粉末。
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