Is it just an asphalt damping sheet, which cars use an asphalt damping sheet

Bitumen is a complex black-brown mixture of hydrocarbons of different molecular weights and their non-metallic derivatives, which is a kind of high-viscosity organic liquid, which is liquid and has a black surface and is soluble in carbon disulfide.

Uses of bitumen:

The main use is as infrastructure materials, raw materials and fuels, such as transportation (roads, railways, aviation, etc.), construction, agriculture, water conservancy engineering, industry (mining, manufacturing), civil and other sectors.

Introduction: Categories of asphalt:

1. Coal coke asphalt.

Coal coke bitumen is a by-product of coking, i.e. a black substance that remains in the distillation kettle after tar has been distilled. It is only different from refined tar in physical properties, there is no obvious boundary, the general division method is to stipulate that the softening point below 26 7 (cube method) is tar, and above 26 7 is asphalt. Coal coke asphalt mainly contains anthracene, phenanthrene, pyrene, etc., which are difficult to volatilize.

These substances are toxic, and the properties of coke bitumen vary depending on the content of these components. The change of temperature has a great influence on the coal coke asphalt, which is easy to brittle in winter and easy to soften in summer. It has a special smell when heated; After heating to 260 for 5 hours, the anthracene, phenanthrene, pyrene and other components contained in it will volatilize.

2. Petroleum asphalt.

Petroleum bitumen is the residue after distillation. Depending on the degree of refining, it is formed into a liquid, semi-solid or solid at room temperature. Petroleum asphalt is black and shiny in color and has high temperature sensitivity.

Because it has been distilled to more than 400 degrees in the production process, it contains very few volatile components, but there may still be polymer hydrocarbons that have not volatilized, and these substances are more or less harmful to human health.

3. Natural asphalt.

Natural bitumen is stored underground, either to form layers or to accumulate on the surface of the earth's crust. Most of this asphalt has been naturally evaporated and oxidized, and generally does not contain any toxins.

Asphalt materials are divided into two categories: ground asphalt and tar asphalt. Ground asphalt is divided into natural asphalt and petroleum asphalt, natural asphalt is the residue of oil seeping out of the surface after long-term exposure and evaporation; Petroleum bitumen is a product obtained by refining and processing petroleum residue oil after appropriate process treatment. Tar asphalt is a product of reprocessed tar obtained by dry distillation of organic matter such as coal and wood.

The vast majority of the asphalt used in the project is petroleum asphalt, which is a mixture of complex hydrocarbons and their non-metallic derivatives. Usually the flash point of asphalt is between 240 330, and the ignition point is about 3 6 degrees higher than the flash point, so the construction temperature should be controlled below the flash point.

At present, there are two most common types of damping plates: 1Asphalt is the main material with auxiliary materials 2Nitrile rubber damping sheet.

Asphalt is harmful to the body, has a taste, is cheaper, nitrile rubber is harmless and odorless, and the temperature range is also wider, and it can be used in the temperature range of -40-120.

According to my understanding, many friends don't know much about some car knowledge, such as can the damping sheet of car asphalt be replaced? A lot of people ask this question. If you want to know, please take a look at my introduction below, I hope it will inspire and help you.

The asphalt shock absorber of the car can be detected and replaced. Asphalt shock absorbers are glued to the body. Motorists can go to a professional agency to shovel off the asphalt damping pads.

Asphalt damping sheets are used by many vehicles, asphalt damping sheets can enhance sound insulation and comfort. If the rider wants to remove the asphalt blocker, he needs to install some sound insulation materials, otherwise the noise of the car will increase.

Many car brands use asphalt damping sheets in the production of automobiles. The material has a certain toxicity, but this toxicity hardly harms the health of the occupants of the car.

A lot of riders think that only some of the cheaper bikes will use asphalt pads. In fact, many luxury brands use asphalt damping pads in the process of manufacturing their cars.

If the riders are very concerned about this asphalt shock absorber, they can remove the asphalt shock absorber of the whole bike after buying the car and replace it with a better material.

When using the car in the summer, try not to park the car in the sun, which may produce some harmful substances to the car. Don't park under a tree in the summer because there will be chewing gum on the body. In summer you can park your car in a shady underground parking lot. @2019

It is reported that some Japanese cars do not use asphalt damping sheets. Before the move, most of the models on the market were equipped with asphalt damping plates. You will be hard-pressed to avoid the presence of asphalt. You can only pray that it passes.

Damping plates are components used to reduce vibrations in the car and improve comfort in the car. The shock-absorbing gaskets in the car are mainly distributed on metal plates with large internal areas and relatively flat shapes. Their function is to use their viscoelastic properties to dampen the vibration generated by the metal plate, and at the same time affect the natural frequency of the body that produces noise, so as to improve the noise generated when the whole vehicle vibrates, so as to achieve the purpose of sound insulation and noise reduction.

There is a layer of tough damping material for shock resistance, noise reduction and heat insulation in the cabin, which is mainly distributed around the cabin, such as the floor under the seats, the aisle floor, the wheel cover, and the spare tire groove. Hyping up the extremely high safety risks of asphalt damping sheets is an overstatement. Most of the asphalt damping sheets used in the car are qualified, so you can rest assured when using the car.

Regarding the odor problem, we believe that the possibility of odor in the interior carpet and leather is much greater than that of asphalt damping sheets. We still want automakers to switch to eco-friendly materials, while setting stricter standards to eliminate all potential hazards.

Millions of car purchase subsidies.

It is reported that some Japanese models do not use asphalt damping sheets. The vast majority of models on the market today have asphalt damping pads, and you can hardly avoid the presence of asphalt, and you can only pray that it is qualified.

Damping pads are used to reduce vibrations in the car and improve cabin comfort. The damping gasket in the car is mainly distributed on the metal plate with a large internal area and a relatively flat shape inside the trunk, and the function is to use its viscoelastic characteristics to dampen the vibration of the metal plate and at the same time affect the natural frequency of the body without noise, so as to improve the noise generated when the vehicle vibrates, so as to achieve the purpose of sound insulation and noise reduction.

In the carriage, a layer of tough damping materials is pasted for shock resistance, noise reduction and heat insulation, which are mainly distributed around the carriage, such as the floor under the seat, the tunnel floor, the wheel cover, and the spare tire groove. It is an exaggeration to claim that asphalt damping sheets have extremely high safety risks. The asphalt damping pads used in most cars are qualified, so you can rest assured when using the car.

As for the odor problem, we believe that the possibility of odor from the carpet and leather in the car is much greater than that of the asphalt damping sheet. We still hope that car manufacturers will switch to environmentally friendly materials, and at the same time set stricter standards to eliminate all potential pitfalls. (Photo by photo:.)

Wu Binbin) @2019

I firmly believe that many people understand that asphalt damping sheet is a damping sheet that uses asphalt as a raw material, which is a viscoelastic raw material, which can stick to the inner wall of the thick steel plate of the car body, and the key is to reduce noise and vibration, but it contains carcinogens such as nitrosamines. After 315**, it was changed to a radical vulcanized rubber butyl damping sheet.

The general automotive application asphalt material can reach 8-15 kg, and the asphalt used in the reliable processing and manufacturing industry will not be carcinogenic, the car damping sheet is not selected medium temperature coal tar asphalt, so it is not easy to be carcinogenic, and naturally will not remove a clear which core some manufacturers choose shoddy asphalt, and the previous was copied very hot Audi sepsis thing, the official response is coming, Audi car application is "modified material ** asphalt damping sheet", not containing carcinogens "medium temperature coal tar asphalt damping sheet". ”。

Asphalt damping sheets are generally divided into three categories:

The first category, pure natural asphalt, the main components are asphaltene, epoxy resin and other collagen fibers, there are also a little metal materials and non-metallic materials and other mineral residues, which have already undergone long-term pure natural volatilization and air oxidation, and generally do not contain harmful substances.

The second category, ** asphalt, the main components are oil, collagen fiber, asphaltene, and it is different in application and is divided into slow road asphalt, engineering construction asphalt, moisture-proof and waterproof asphalt, etc., which contains a small amount of harmful endotoxin.

The third category, medium-temperature coal tar asphalt, is one of the specific commodities in the production and processing of medium-temperature coal tar, because it contains the carcinogen phenbipyrene, and on October 27, 2017, WHO included it in the list of carcinogens.

After some test results, Volvo car under high exposure, the air index test degree in the car is 65 degrees, if the use of asphalt damping sheet, the air index is not qualified at all, so most of Volvo does not need asphalt damping sheet.

Millions of car purchase subsidies.

Asphalt damping sheet refers to the use of asphalt as a raw material damping sheet, asphalt damping sheet is attached to the inner surface of the body, as a viscoelastic material, close to the steel plate wall of the body, mainly to reduce noise, reduce vibration, that is to say, to play a damping role.

Asphalt damping plates are mainly divided into hot-melt asphalt damping plates, self-adhesive asphalt damping plates and magnetic asphalt damping plates; The main asphalt damping plate used in the car is hot-melt and magnetic. In terms of production process, these three kinds of asphalt damping plates are close.

The difference is that the self-adhesive type and the magnetic type have one more process step than the hot melt type. Hot-melt asphalt damping sheets are heat-attached to the product during later application, while self-adhesive and magnetic asphalt damping sheets are added with adhesive layers or magnetized during the production process. In terms of environmental protection, the International Cancer Organization has identified benzopyrene and other substances as carcinogens.

The polyolefin polymer material has passed the EU RoHS test and is considered to be harmless to the human body. In the accelerated heat aging test, the performance of the asphalt damping plate decreases sharply for 150 hours, and the release of harmful substances will be accelerated when heated. Moreover, the performance of asphalt damping board will decline in 23 years.

Photo by Chen Jie 2).