Noise pollution has become the second killer that threatens human public health after air pollution. Noise pollution can increase a person's blood pressure and the nervous system, causing anxiety and irritability and affecting people's quality of life. Therefore, using soundproofing materials for home decoration is a good way to prevent noise pollution. So what should be paid attention to in the process of purchasing indoor sound insulation materials? Let the editor show you. 1. Purchase of soundproof windows Look at the material: including aluminum profiles, glass, hardware, whether the color is the same, whether the hardware assembly is complete. Look at the processing: high-quality aluminum alloy windows, fine processing, smooth tangents, and consistent angles (the main frame is usually 45 degrees or 90 degrees), there should be no obvious gaps in the stitching process, and the switch is smooth. Look at the glass: to see if it is hollow glass, whether there is a coating, the composite film is generally corrosion-resistant, wear-resistant, and high gloss. Look at the size: check whether the window size is correct. Second, purchase soundproof doors Look at the weight: The formula of sound insulation is directly related to the density of the material. Therefore, the dense sound insulation is relatively good, and the molded door is relatively light. This is the root of the poor sound insulation of the molded door. But note: the sound insulation cotton in the middle of the flat hollow door will be more soundproof than the solid wood door. Look at the thickness: the thicker the surface layer board, the better the sound insulation effect. In general, the surface laminate of wooden doors should be 8mm thick. The thickness of the surface layer and the flatness are also better, but the cost will increase. But: The surface of the iron fire door is 3mm thick, and the sound insulation effect is also good. Look at the flatness: the flatter the wooden door, the better the combination with the door cover, regardless of the structure. As long as the deformed wooden door is soundproof, it will not work. Editor in charge: GO Jiaju
Drum brush is divided into long hair, medium hair, short hair three kinds, its performance is the length of the drum brush hair, rather than the thickness and length of the drum itself, brush hair is usually divided into wool and chemical fiber two kinds.
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Different rollers will brush different effects, long hair rollers will brush out some fine texture, concave and convex feeling, similar to the texture effect. The paint surface after short wool roller besmear is more uniform, smooth, without concave and convex feeling, in the wool is between the two.
Roller brush is mostly made of wool and foam plastic, which can be divided into paint drum brush, hair drawing drum brush, floor paint drum brush, flat coating drum brush, etc., mainly used for large-area paint rolling in architectural decoration engineering. And can be used for coating and rolling all kinds of paint, such as: latex paint, anti-rust paint, internal and external wall paint, wallpaper glue, etc.
Note:
The use of drum brush as long as the straight brush can be wiped, if you want to daub evenly, the drum is best in the paint bucket to be fully absorbed, and then take out a few rolling on the inclined plane, press out the excess paint and then begin to brush the wall.
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How to avoid the harm of noise pollution