At present, there are many brands of UPVC Profile doors and windows in the market, good and bad. UPVC Profile doors and windows are also divided into three to six or nine. Inferior UPVC Profile doors and windows are flooded with the temptation of their prices. So when you buy UPVC Profile doors and windows, you must ask and compare, don't just pay attention to the appearance color.
The appearance color of UPVC Profile doors and windows should be bluish white, the color is too white or gray, indicating that the stable ingredients in the material are not enough, and it is easy to age and turn yellow over time; the surface should be smooth and flat, without welding fracture.
Special steel linings should be embedded in door and window frames and fan profiles. The sealing strip should be flat, without crimping, without falling off, and the rubber strip should be odorless. The hardware is flexible and smooth; auxiliary materials such as bead and seal of UPVC Profile doors and windows should be matched with the main profile. Good UPVC Profile doors and windows will not age or deform for 30 to 50 years in the outdoor wind and sun; while the color of pure white or yellowing in white is relatively inferior, so the color has poor sun protection ability, and it will be worse after a few years of use. It turns more yellow until it is aging, deformed, and brittle. The reason is that there is too much calcium in the profile formula.
The drainage grooves and the air pressure balance holes are processed in staggered positions to avoid direct entry of cold wind and dust. The drainage holes of the UPVC Profile window that are relatively tightly assembled are equipped with airtight covers to prevent rainwater from flowing into the room from the holes; UPVC Profile doors and windows The selected glass should be flat, free of water lines, firmly installed, not in direct contact with the plastic profile, and sealed bead close to the gap. If it is a double-glass interlayer, there should be no dust and moisture in the interlayer; there should be aluminum slide rails under the sliding window frame to facilitate its replacement. In general, double pulleys are better than single pulleys.
Therefore, everyone must pay attention to the above points when purchasing UPVC Profile doors and windows, and don't be confused by the appearance of inferior doors and windows.