The importance of sealant The key to the doors and windows is the seal. The sealing effect, the strip plays a key role. The material of the sealant strip is generally modified by PVC, and the plasticizer added inside plays a key role. At present, the more stable plasticizer is dioctyl phthalate and dibutyl ester, but the market price is higher. As a result, some small manufacturers use some cheap things to replace, such as waste oil, oil refinery remaining oil base, etc., which buried a lot of hidden dangers for future users. These hidden dangers are as follows: 1. Doors and windows have low airtightness. Poor quality sealants contain inferior plasticizers or substitutes, which tend to age and harden and shrink in the winter. Gap between the glass and the profile caused leakage and dust. Many users often find out that the red liquid is flowing out from the bead inside the window of the rainy season, which is caused by the corrosion of the steel liner after the water enters between the window glass and the sealant. Not only greatly reduce the appearance of doors and windows, but also greatly affect the life of doors and windows. 2, the surface of the rubber tape appears oil seepage phenomenon. Waste engine oil and PVC do not combine with sealant strips at all. The surface is prone to grease. Yellow stains appear on the surface of the profile. It is not environmentally friendly, has a odor, and pollutes the air. Advantages and Disadvantages of sealing tape identification method: 1, see the proportion. The quality of the same amount of sealant should be light, and vice versa. Regular manufacturers generally use a small proportion of light calcium carbonate as a filler, and some manufacturers use talc, heavy calcium, to increase the proportion of products. Because sales are based on weight. 2. In the summer, if the contact surface between the sealant and the profile is stained and discolored, the oil will leak yellow. 3, use the nose to smell whether there is odor, normal PVC material has a little bit of alcohol, very small, almost can not smell. In the production process of doors and windows, the investment in sealant strips is small, but its role can not be ignored. Inadvertently choosing production units in order to save money is actually not worth the candle. The door and window production units will quickly lose their credibility in order to reduce the cost of selecting inferior sealing tapes. What they lose is not only a customer, but also less sensible.
