What Is The Role Of Adhesives In Car? Application Analysis Of Adhesives In Automobile Manufacturing Industry?

The demand for automotive adhesives and sealants is growing rapidly. Adhesives and sealants for automobiles are an important auxiliary material for automobile production. With the development of automobiles in the direction of lightweight, high-speed energy saving, safety and comfort, low cost, long life and pollution-free applications are becoming more and more important.

In terms of glues for automobile manufacturing, the average dosage of organic silica gel is 300g/vehicle, the average dosage of polyurethane glue is 900g/vehicle, acrylate is 66g/vehicle, and anaerobic adhesive is 120g/vehicle; The average amount of silica gel is 60g/vehicle, and the average amount of polyurethane glue is 40g/vehicle.

The application of adhesives and bonding technology in automobile manufacturing can not only enhance automobile structure, fasten rust prevention, heat insulation and vibration reduction, interior and exterior decoration, etc., but also replace traditional processes such as welding and riveting in certain parts, simplify production processes and optimize products. structure. Therefore, adhesives play an increasingly important role in the lightweight, energy saving and consumption reduction of automobiles, prolonging service life and improving performance.

From the perspective of the working parts and functions involved in the entire automobile manufacturing process, automotive adhesives can be roughly divided into adhesives for welding processes, adhesives for painting processes, adhesives for interior parts, adhesives for assembly parts, and special adhesives. Craft glue and other five categories.

Adhesive parts for automotive applications

  1. Seat pressure sensor
  2. Car lights
  3. Car antenna
  4. Filter
  5. Door sensor
  6. Door switch
  7. Rearview mirror
  8. Ignition module
  9. Harness
  10. Car anti-theft coil
  11. Electronic accessories
  12. Tire pressure sensor
  13. Seat heating device
  14. Car remote control
  15. Seat belt sensor

Among them, the glue for welding process is mainly used to replace spot welding or reduce welding points, and play the role of strengthening structure, sealing and rust prevention, vibration reduction and noise reduction. Its main varieties are:

Hemming adhesive: It is used in crimping structures such as doors, hoods, and trunk lids. It has high bonding strength and has completely replaced spot welding structures. One-component epoxy resin is generally used for this kind of glue, and the dosage for a bicycle is about 200g;

Spot welding sealant: It is pre-applied on the overlapping parts of the steel plate welding, and the gap is filled after spot welding to ensure sealing and prevent rust. For those parts that are masked after assembly and difficult to apply weld sealant, spot welding sealant is even more indispensable;

Expansion damping glue: This kind of glue is often used between the inner and outer panels of the door, between the outer body cover and the reinforcing ribs. It is generally made of synthetic rubber or resin and combined with a foaming agent. After curing and expansion, the cover can be combined with the reinforcing rib to play the role of vibration reduction and noise reduction.

There are not many varieties of glue used in the coating process, but it is the most used type in automobiles. Among them, the truck is about 2kg, and the car is more than 5kg. It is mainly used for automobile sealing, leakage prevention, rust prevention and buffering of sand and gravel to the chassis when the car is running at high speed. impact and reduce the noise in the car, such as pvc plastisol and its modified products.

Adhesives for interior parts are mainly used in body roof, door inner panel waterproof membrane and windshield lining, etc., to increase the beauty of the car, enhance the rigidity of the body, and seal, such as neoprene, butyl, and polyurethane glue. Wait.

The glues used for assembly parts mainly include anaerobic glue, silicone sealant, etc., which are mainly used in the assembly of automobile engines, gearboxes and chassis.

In addition, in the process of automobile manufacturing, some special process adhesives, such as phenolic resin adhesive used for the bonding of brake shoes and friction linings, are also used, which can replace riveting and have reliable bonding strength, which can reduce noise and prolong friction lining. Service life and other functions; the pressure-sensitive tape used in the car assembly process can protect the car itself from pollution, bump damage, or assist in fixing and positioning when assembling parts.

With the development of the automotive industry, automotive adhesives are developing rapidly from variety to output. The automotive industry has high requirements for the quality, performance and safety of adhesives. Domestic adhesive products are relatively backward and have a single variety, which is difficult to meet the demand. It is necessary to import a large number of high-quality and high-performance adhesives. Therefore, efforts to develop high-quality, high-performance adhesives to meet the needs of the automotive industry are expected to yield high returns. The market demand for automotive adhesives is promising.

Is silicone glue toxic? What are the components of silicone glue? Analysis of the principle of silicone glue and introduction to the mechanism of action

Is silicone glue toxic? Recently, many users found the official website of CoolThermo silica gel through Google search for CoolThermo silicone glue, and consulted a lot of questions. Is your silicone glue environmentally safe?

As we all know, silica gel is a new type of environmentally friendly and non-toxic material. What is irreplaceable in silicone products is silicone rubber adhesive, that is, silicone glue. Whether the silicone glue is toxic or not, we have to analyze the principle, mechanism of action of silicone glue and the evaluation criteria for the toxicity of the adhesive.

Analysis of the principle of silicone glue

Silica gel, also known as silicic acid gel, is a highly active adsorption material and is an amorphous substance. Silica gel components Silicone based glue, silicon dioxide, calcium carbonate, curing agent, etc. The main component is silicon dioxide, which is chemically stable and non-flammable. Silica gel can be said to play an increasingly important role in our lives, but in our daily use of silica gel, we are faced with the adhesion of silica gel and silica gel, silica gel and plastic products, silica gel and metal and other materials, which requires us It has a mixture that makes it stick together, which is silicone glue.

Introduction to the mechanism of action of silicone glue

Silica gel glue is a highly active adsorption material, which is an amorphous substance with organosilicon polymer compound as the main component. Silicone glue is a type of adhesive in silicone rubber that is used for bonding silicone and silicone, silicone and similar plastics. It is cured by contacting water molecules on the surface of the bonded or sealed object or water molecules in the air. It is insoluble in water and any solvent, non-toxic and tasteless, chemically stable, and does not react with any substances except strong alkali and hydrofluoric acid. Various types of silicone glues form different microporous structures due to their different manufacturing methods. The chemical composition and physical structure of silicone glue determine that it has many characteristics that are difficult to replace by other similar materials: high adsorption performance, good thermal stability, stable chemical properties, and high mechanical strength.

What is the standard for judging the toxicity of silicone glue?

During the working process of the adhesive, some benzene substances are volatilized, resulting in poor breathing or skin allergies. This is a toxic standard that all users cannot accept. The silicone glue is made of new raw materials, which is environmentally friendly and healthy, and does not contain any toxic substances.

It has been proved by authoritative testing that silicone glue is a solvent-free product, does not contain any volatile substances, will not affect human health and will not pollute the environment.

When the silicone adhesive is cured, it will not volatilize formaldehyde and benzene. All raw materials have passed SGS environmental protection testing and are food-grade materials. In short, the raw material of silicone glue has reached the level that can be imported. How can it contain toxic substances?

If you choose a solvent-based silicone rubber adhesive, it is important that it has undergone advanced medical-grade testing and SGS environmental protection testing, and it can also be used. In order to avoid potential safety hazards, it is recommended to choose a paste-like adhesive, which has no volatiles and no worries.

Silicone glue adhesive is not a dangerous product, but a chemical, which may worry many users; for all users, choosing a healthy and environmentally friendly silicone glue adhesive will not harm the body of the staff, Will not pollute the environment. Don’t buy products without environmental testing to save some money, be careful to be deceived.

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