What kind of material is soundproof cotton harmful to people?

What is the sound insulation principle of sound insulation cotton?

The sound insulation function is related to the fiber open space idle structure of the material, such as the thickness of the fiber (between microns and tens of microns is better) and the material density, the ratio of the air volume in the material to the material volume (called the open space idle rate, the open space idle rate of glass wool is more than 90%), and the shape and structure of the open space in the material. The ratio of the sound energy absorbed over a certain area to the incident sound energy is called the absorption coefficient of the boundary surface. The ratio of the above materials is called soundproof cotton.

What material is good for soundproof cotton? The result?

At present, the popular soundproofing cotton materials are: polyester fiber soundproofing cotton, high-density egg cotton, glass fiber soundproofing cotton, gradient cotton, rock wool and so on.

Among them, the soundproof cotton made of environmentally friendly polyester fiber is good. 100% polyester fiber, which is the most natural and harmless to the human body, and has no pollution to the environment. The environmentally friendly polyester fiber is formed by superimposing hot pressing bonding, which can make the sound reflux in its cavity through the special high-density structure of the fiber, and effectively realize the function of sound absorption and noise reduction; The biggest difference between it and traditional sound insulation materials is that it is environmentally friendly and harmless, has strong sound absorption ability, the product does not have any peculiar smell, is harmless to the human body (not itchy), uniform thickness, sound absorption, soft feel, smooth surface, good vertical and horizontal strength, and its sound absorption effect is good.

Which is better, soundproof cotton or soundproof panel?

1. The actual sound insulation effect of the sound insulation board material is directly proportional to the density of the material, for example: the sound insulation effect of steel is better than that of gypsum board.

2. The use of sound insulation materials will be more significant than that of single layer. Soundproof cotton is the most used sound-absorbing material in engineering construction, and 5cm thick boards will be selected in the partition wall. Do not place the soundproof cotton at will or fill it privately, which will directly affect the effect of sound insulation.

"The damage of soundproof cotton is attributed to dust, and I tell you that the damage to the human body caused by the asbestos used in soundproof cotton is attributed to dust

It attaches to the human respiratory system, and overnight it will cause damage to the person's respiratory immune system, and eventually accumulate many asbestos particles in the lungs, causing pneumoconiosis. Asbestos is very harmful to the human body, because its fiber is very fine, it is very simple to inhale, and it will directly cause lung diseases, lung calcification, and so on. And its influence is not short-lived, but generally accumulates over a long-term period of ten to twenty years.

Hazards of soundproof cotton:The damage to the human body caused by the asbestos of soundproof cotton is classified as dust, which will attach to the human respiratory system.

, causes the person's respiratory immune system.

After all, many asbestos particles accumulate in the lungs, causing pneumoconiosis.

Asbestos is very harmful to the human body, because its fibers are very fine and easy to inhale, which directly causes lung diseases, lung calcifications and the like. And its influence is not short-lived, it usually accumulates over the course of 10-20 years.

Precautions when purchasing soundproof cotton.

1. When purchasing soundproof cotton, you should know that qualified and regular soundproof cotton products are fluffy materials, and there are a large number of small holes that are connected inside and outside, and these small holes are evenly distributed.

Strong vertical and horizontal ability, soft touch and smooth surface.

2. When purchasing soundproof cotton, it is recommended to buy non-combustible or flame-retardant fireproof materials, which meet the fire protection standards and have certain environmental protection functions.

3. In home decoration, do not buy asbestos soundproof cotton, because the fiber of asbestos is very fine, which is easy to inhale into the human body and will cause harm to the human body.

**Lesion: Soundproof cotton.

The fibers are very fine, and it is easy to stick to the human fiber and penetrate into the disease, and then cause the disease. Respiratory tract.

Damage: Sound insulation cotton is a kind of harm to the human body caused by dust, which is easy to be inhaled into the body and attached to the human respiratory tract over time, which will lead to the respiratory system of the human body.

Damaged. <

**Lesion: The fiber of soundproof cotton is very fine, and it is easy to stick to the person's **, and then cause **lesion.

Respiratory tract damage: Noise insulation cotton is a kind of harm to the human body caused by dust, which is easy to be inhaled into the body and attached to the human respiratory tract over time, which will lead to damage to the respiratory immune system.

Soundproofing cotton is also a kind of soundproofing material, the material used in soundproofing cotton is mainly asbestos, itself is also non-toxic, generally the asbestos and other materials in the soundproof board are isolated from the outside world, as long as there is no direct contact, normal life is safe.

Soundproof cotton is toxic. Sound insulation cotton has a good thermal insulation effect, after pasting in the hood of the car, it can effectively prevent the high temperature of the engine from being transmitted directly to the hood, so as to protect the paint on the surface of the hood, and at the same time avoid the foggy vision of the hood in rainy days.

Another function of soundproof cotton is heat insulation, which can reduce the heat transmitted to the surface of the hood when the engine is running, and the vehicle with the soundproof cotton on the hood will basically not produce white fog in rainy days. On rainy days and in winter, the difference between the outside air temperature and the engine temperature, as well as the combined effect of rain on the hood, will accelerate the oxidation of the paint surface. Thermal insulation cotton can protect the paint finish of the hood to a certain extent.

Acoustic insulation is made of fibrous porous soundproofing materials, such as polyester fibers.

Cotton sound insulation cotton, centrifugal glass wool, rock wool.

Mineral wool, plant fibers.

The sound insulation mechanism of soundproof cotton is that there are a large number of tiny connected pores inside the material, and the sound waves can penetrate deep into the material along these pores, and friction with the material will convert sound energy into heat energy.

The sound insulation characteristics of porous sound insulation materials are that the sound insulation coefficient gradually increases with the increase of frequency, which means that the absorption of low frequency is not as good as that of high frequency.

The so-called soundproof cotton is generally called sound-absorbing material in acoustics.

The cotton you are talking about belongs to porous sound-absorbing materials, and porous sound-absorbing materials can be divided into:

1.Fiber materials: such as felt, glass wool, rock wool, environmentally friendly sound-absorbing cotton (polyester fiber cotton), etc.

2.Granular material: perlite acoustic panel, etc.

3.Foam material: polyurethane foam, sponge, etc.

4.Metal materials: foamed fiber aluminum plate, etc.

I have been engaged in architectural acoustic engineering for many years, and the commonly used ones on the market are: rock wool, glass wool, melamine cotton for tooling (extremely expensive, but the effect is particularly good, Class A fireproof, environmentally friendly, not prickly) Household: plant fiber (I have seen bamboo fiber) and polyester fiber.