In the course of daily driving, the chassis of the vehicle inevitably bears hundreds of times or even thousands of vibrations. It is the most prone to metal fatigue and the most worthwhile place for protection because of the driving safety and transfer value of the car. The quality of the chassis is a big factor. The use of noise insulation cotton sound insulation, after the paste in the car hood, can effectively prevent the engine's high temperature directly transmitted to the hood, in order to protect the engine hood surface paint, while avoiding the fog in the rainy day, the impact of sight. For the first time the friends who contacted, it is inevitable that how much money a soundproof cotton, a soundproof cotton effect, soundproof cotton useful and so on these questions. Don't worry, I will help you to reveal the answer one by one, based on the knowledge of how much money and a soundproofing material is used in soundproofing. Sound insulation cotton Due to advanced car repair technology, polo cars have achieved a very high level of noise control. Many car owners have had the experience of re-firing after the car has been started, which fully demonstrates this point. In the choice of lowering costs for the 03 models and later models, Volkswagen did not hesitate to sacrifice the noise insulation of the hood. In fact, this is definitely not a dispensable "enjoyment" part. Although no one will put it on the list of optional parts, the decibel increase in the ear will reduce the overall grade of the car. Especially when the engine is running at a high speed. Another function of the sound insulation wool is heat insulation, so it can reduce the heat transmitted from the engine operation to the surface of the hood, and the vehicle installed with the sound insulation cotton of the engine cover can hardly produce white fog in the rainy weather. Rainy days and winter, due to the large temperature difference between the outside temperature and the engine, together with the action of rain and other flushing on the hood, will accelerate the oxidation of the paint. Insulation wool can protect the lacquer of the hood to some extent. Is noise insulation useful? The concept of sound-insulated cotton: sound produced by objects → sound waves transmitted in the air → cotton has a multi-fiber structure → reflections of sound waves passing through cotton, intermeshing, colliding, sound energy is converted into heat → sound intensity is weakened → sound disappears. Another function of the sound insulation wool is heat insulation, so it can reduce the heat transmitted from the engine operation to the surface of the hood, and the vehicle installed with the sound insulation cotton of the engine cover can hardly produce white fog in the rainy weather. Rainy days and winter, due to the large temperature difference between the outside temperature and the engine, together with the action of rain and other flushing on the hood, will accelerate the oxidation of the paint. How much is a soundproof cotton Many friends in the consulting soundproofing cotton, often the first sentence will ask how much money a flat ah? The quality of sound insulation cotton is divided into three six nine, the product material, bulk density, quite color, specifications, environmental protection, fire rating and many other factors are different , resulting in different prices of insulation cotton. Affect the noise cotton price factor Through the law of the value of goods we understand that: the value of goods is determined by the social labor time, and the value of the product determines the relationship between the supply and demand of the product price product and the price of the product; the price always fluctuates around the value. Therefore, product prices are related to production technology, work efficiency, composition of materials, weight tolerance, environmental protection functions, and fire rating. Sound insulation cotton precautions The product is a fluffy material, has a large number of small and large holes connected inside and outside, and the texture is evenly distributed. It has a high aspect ratio, a soft touch, and a smooth surface. It is recommended to purchase non-flammable or flame-retardant fire-retardant materials to meet the fire-fighting standards; it has certain environmental protection functions. To protect people's physical and mental health. Soundproof cotton price Here for everyone to introduce the price of common soundproofing cotton, for your reference only. Glass fiber insulation cotton is divided into two kinds of laps and cotton board, the volume weight of the lap is small, and the price of Bofu is as low as a few bucks per ping is only ten yuan; the bulk density of the cotton board is 30km or 90km and can be customized. Commonly used for 35km, 40km eggplant two, the price per level is between 15 to 20 yuan. Acrylic fiber insulation is relatively expensive, mainly due to the use of polyphenol fiber material, new environmental protection, soft touch and other advantages, specifications and fiberglass insulation cotton is roughly the same, the main difference is the use of more crowded places, the higher the price . Note: This price is for reference only! Due to geographical differences, of course, the price will be different. For more details on the prices, please refer to the local distributors! Sound insulation cotton effect How does the soundproofing effect work? We also need to explain with the truth. Time is the standard for testing truth. We use the results of the following experiments to advance your decision. Experiment 1: Thick curtains The selected flannel curtains were priced at 40 yuan/m2 and a thickness of 2 mm. He first covered the cell phone with a single layer of curtains, played the song, and tested it with a noise meter at a distance of 20 cm for 3 minutes. The highest sound was measured at 67.9 dB. The lowest 59.9 dB. Experiment 2: carpet The experimental wool rug sells for about 80 yuan per square meter. According to the same method, the highest volume is measured at 63.5 decibels and the lowest is 56.2 decibels. Experiment 3: Sound insulation cotton One of the most common 300m soundproofing cottons on the market was selected. The price was about RMB 50/sq.m., and the sound volume dropped significantly. The measured noise value was a maximum of 57.9 dB and a minimum of 48.3 dB. Experiment 4: Multi-layer glass The glass wall is a double-layered structure. The song is played on a strong mobile phone. The test is performed at a distance of about 20 cm outside the wall. The maximum volume is 62.4 dB and the minimum is 59.4 dB. Principle of experiment “There are two factors that affect the size of the sound, one is the sound insulation material, and the other is the sound source distance. The same distance is blocked by different materials from the same source. The decibel value measured by the noise meter is the same for each material. Sound insulation effect. In this experiment, the noise reduction effect was best with noise-damping cotton, which blocked 15.9 dB noise. The worst was thick curtains, blocking only 5.9 dB of noise. Editor's summary: The above is the introduction of related knowledge about how much money is a soundproofing cotton. Because the fabric is soft, the curtains cannot completely cover the windows in actual use, so the actual noise reduction effect is also discounted. Although the interior of the carpet is more porous than the curtains, it is not enough to absorb a lot of noise. Air in the multi-layer glass and sound-insulated cotton sandwich blocks and absorbs sound waves, so it has a good noise reduction effect. How much does a led lamp look at Feng Shui How much noise insulation cotton decoration about how much money noise cotton how much money a flat The PVC
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