Under the demand for energy saving and comfortable living, aluminum co-extruded passive windows have become the ideal choice for many consumers in pursuit of high quality of life due to their excellent airtightness. As a technical expert of Liaoning MOHAN New Material Co., Ltd, today we will introduce several methods to accurately determine the strengths and weaknesses of aluminum-plastic co-extruded passive window airtightness.

First, with the help of professional test reports

Check the report of authoritative testing institutions: regular channels of production of aluminum-plastic co-extruded passive windows, will be accompanied by professional and authoritative testing institutions issued by the test report. In the report, the airtightness performance level will be assessed according to the relevant national standards. In our country, the airtightness of external doors and windows of buildings is divided into 8 levels, with 1 level being the worst and 8 levels being excellent. Aluminum-plastic co-extruded passive windows, as high-performance windows and doors, usually achieve airtightness performance of level 6 and above. When purchasing, consumers must ask the business to provide a complete test report, and double-check whether the airtightness performance level is in line with expectations.

Focus on key test data: In addition to the airtightness level, the air infiltration per unit seam length and air infiltration per unit area data in the test report are also very critical. Air permeability per unit seam length refers to the amount of air that passes through a seam of unit length per unit time under standard conditions; air permeability per unit area is the amount of air that passes through a unit area per unit time. The lower these two values are, the better the airtightness of the window. Generally speaking, aluminum-plastic co-extruded passive window unit seam length air infiltration should be no more than 1.5m³/(m・h), unit area air infiltration should be no more than 4.5m³/(m²・h).

Second, observe the appearance and structure of doors and windows

Check the sealing tape: high-quality aluminum-plastic co-extruded passive windows, between the window frame and the window, between the window frame and the wall, will use high-quality sealing tape. Consumers can carefully observe the material and installation of the sealing tape. The sealing tape should be soft and elastic, with smooth and flat surface, without bubbles, cracks and other defects. When installing, the adhesive strip should be close to the window frame and sash, the transition at the corner is natural, without obvious gaps or breaks. Aluminum-plastic co-extruded passive windows produced by Liaoning Muhan adopt EPDM sealing tape, which is not only weatherproof but also has excellent sealing performance.

Check the splicing process of windows and doors: the splicing of windows and doors is an important part that affects the airtight performance. Check whether the splicing of window frames and sashes is tight, and whether there are obvious gaps or misalignments. High-quality aluminum-plastic co-extruded passive windows, using precision welding or riveting process, splicing smooth and good sealing. In addition, the connection parts of the window frame and the wall, the sealant should be coated evenly, without leakage, cracking and other phenomena.

Third, the scene of simple test

Paper test method: Prepare a piece of A4 paper, clip it between the closed window and the window frame, and then try to pull out the paper. If it is difficult to draw out, the window and the window frame between the close fit, airtight performance is better; if the paper can be easily drawn out, and even feel no resistance, then the airtight performance of the window may have problems.

Smoke test method: outdoors, light a cigarette or incense, close to the closed window gap. If the smoke is not sucked into the room, but along the surface of the window dispersal, indicating that the window airtight performance is good; if the smoke is obviously sucked into the room, indicating that the window leakage phenomenon, airtight performance needs to be improved.

Through the above methods, consumers can judge the airtightness of aluminum-plastic co-extruded passive windows more accurately. Liaoning MOHAN New Material Co., Ltd. has always been adhering to the spirit of craftsmanship, strict control of product quality, is committed to providing customers with excellent airtightness of aluminum co-extruded passive windows, to help create a comfortable and energy-saving living environment.