1、 The important role of adhesives and bonding technology

With the development of economy and science, adhesives are indispensable in industries, agriculture, transportation, healthcare, national defense, and people's daily lives. Almost anyone or anything involves adhesive. China's adhesive industry started in the 1950s and has made rapid progress since the 1990s. Adhesive has become an important fine chemical product. It can be said that wherever there are humans, adhesive products and bonding technologies are indispensable. They provide novel and practical processes for industry, and create a colorful life for humanity.

Adhesives and bonding technology play an increasingly important role in structural connections, assembly reinforcement, shock absorption and seismic resistance, weight reduction and growth rate, decoration and decoration, waterproofing and anti-corrosion, emergency repair, etc. Especially in energy conservation, environmental protection, safety, and the development of new technologies, processes, and products, they have become important engineering materials and process methods.

Adhesive technology is an unparalleled special process in other connection methods, playing a significant role in modern economy, modern national defense, and modern technology. There are many adhesive parts on various aircraft in modern aerospace and aviation, with a large adhesive area. For example, the body, wings, operating surface, fairing, integral fuel tank, and other parts of the B-1 aircraft have an adhesive area of up to 80% of the total surface area of the aircraft; The bonding area of Boeing 747 aircraft is approximately 3000 square meters. The aircraft adopts adhesive connections, reducing structural weight by 15% and saving total costs by 25-30%. A heavy bomber used adhesive instead of riveting, resulting in a 34% reduction in structural quality. A large radar adopts an adhesive structure, reducing its weight by 20%. After using adhesive instead of spot welding, the weight of the car body can be reduced by about 10%. The ship uses adhesive honeycomb sandwich panels to manufacture the hull, which can reduce weight by 40% and improve driving speed and safety.

With the lightweight, high-speed, and comfort of automobiles, it is inevitable to use a large number of thin-walled structures and plastic parts, and bonding is the best connection method. Modern architecture requires aesthetics and novelty, indoor facilities emphasize comfort and luxury, and decorative materials are diverse. Adhesives play a special role in building, such as lightweight, energy-saving, sealing, leak proof, warmth preservation, pollution prevention, and durability. The application of adhesives in medicine is emerging and promoting, used for repairing organs, bone grafting, suture hemostasis, repairing eardrums, and so on.

Adhesives and adhesives have various functions such as connection, sealing, insulation, shock absorption, insulation, noise reduction, moisture-proof, adhesive coating, conductivity, magnetic conductivity, wear reduction, oil resistance, etc.

The amount of adhesive used is very small, and its effect is not small; Not much cost, great results. For example, the dosage of 502 instant drying adhesive is measured in drops, curing is measured in seconds, and strength is measured in tons. The bonding efficiency is very high, and the development rate of bonding and sealing technology in the past 20 years is 2.5 times faster than traditional riveting connection methods. It can be firmly believed that adhesives and bonding technology will play a more important role in modern society's production and life.

2、 The characteristics of adhesives and bonding techniques

Innovative and unique adhesives and bonding techniques, with extraordinary versatility, can achieve multiple purposes, and have many characteristics compared to riveting, welding, screwing, keying, mortise and tenon joints, etc. For materials with the same or different materials such as material, shape, thickness, size, modulus, etc., they can be effectively bonded, especially suitable for bonding and connecting parts with irregular shapes, heterogeneity, thin-wall, complex, small, hard and brittle, or thermosensitive properties.

The stress distribution is uniform, does not weaken the structure, and avoids fatigue cracking caused by stress concentration around rivet holes, screw holes, and spot welding, thereby extending the service life.

There is no deformation, warping, hardness reduction, coating damage, residual stress or thermal shock caused by welding. Bonding different metals does not pose a risk of electrochemical corrosion and has anti-corrosion properties. The strength is relatively high, and the shear strength of joints with the same area is increased by 40% to 100% compared to welding and riveting, and the fatigue strength is increased by 5-6 times. Smooth surface can improve aerodynamic characteristics. It can save the number of parts and valuable materials, reduce structural weight, and achieve lightweight.

It has multiple functions such as connection, insulation, sealing, anti-corrosion, moisture-proof, shock-absorbing, weight reduction, insulation, noise reduction, conductivity, and magnetism. It can simplify the process without requiring high machining accuracy, and does not require post-processing such as calibration and precision machining. No need for large equipment, no special conditions required, simple and easy to operate. Capable of making connections under special conditions, such as underwater bonding, field operations, high-temperature and high-pressure non-stop plugging of chemical equipment, pressurized bonding of oil pipelines, repair of tanks or devices containing flammable media, as well as medical organ repairs, hemostatic sutures, etc.

Quick bonding, solving urgent problems, shortening construction period, saving resources, reducing costs, lowering costs, improving efficiency and economic benefits.

But bonding cannot completely replace traditional connection methods. If it can be used in conjunction with welding, riveting, screwing, embedding, etc., they can leverage their respective advantages and achieve better results.

3、 The Development Direction and Prospects of Adhesives

In recent years, with the vigorous development of automobiles, household appliances, building materials, aerospace industry, decoration engineering, water conservancy, transportation and information industry, electronic instruments and electronic appliances, etc., the demand for adhesives in various industries and the demand for adhesive varieties under different conditions are also increasing. At the same time, higher requirements have been put forward for adhesives and the efficiency and environmental pollution of the bonding process. Overall, the development direction of future adhesives is as follows:

Firstly, with the increasing demand for environmental protection and the improvement of environmental regulations, environmentally friendly adhesives have gradually become the mainstream of development.

Secondly, in recent years, high-quality, high-performance, and high value-added adhesives have emerged as a new profit growth point and research hotspot in the adhesive market.

Thirdly, the complex synthesis process and strict equipment requirements make it difficult to promote the application of rubber varieties, while high-performance "green" environmentally friendly adhesives with a wide range of raw material sources, easy preparation, and convenient use will become the "darling" of the market.

After clarifying the development direction of adhesives, we need to make efforts to improve the technical content of adhesive products, which can be considered from the following aspects:

1. Design new formulas with new unique properties to adapt to more stringent working environment conditions. Like aerospace adhesives, American AST The ME595 standard stipulates that aerospace adhesives and sealing materials have a mass loss of not more than 1%, condensable volatiles of not more than 0.1%, and water recovery of not more than 0.1% at high vacuum 710-3Pa, temperature 125cI=, and 24 hours. In the past, only a few aerospace powers such as the United States and Russia were able to produce this material. In recent years, China has successfully developed adhesives and sealing materials for aerospace micro motors and components that meet the requirements of ASTME595.

2. Introducing new technologies to improve adhesive performance, the application of nanotechnology is no longer a fantasy, and practical progress has been made in the development of many materials. The Institute of Solid State Physics, Chinese Academy of Sciences, Shanghai University, Qingdao University of Chemical Technology, East China University of Science and Technology, and others have all achieved new results, including functional high-strength carbon pipes and PP plastics that have made practical progress. This confirms that nanoparticles can enhance the cohesive strength of polymer materials and crystalline materials, and can play a reinforcing role in adhesives. The introduction of nanoparticles has led to the production of resilient ceramics, and new ideas have emerged for the toughening of inorganic adhesives. Latex paint coatings that reflect ultraviolet rays are put into production and have weather resistance, resistance to foreign object adsorption, antibacterial, algae resistance, weathering resistance, and artificial aging test life of more than 10 years. They can withstand more than 6000 brushes.

3. In the past, the feeding and temperature control of reaction vessels were mostly manual or semi-automatic in the development of automated production equipment. In the future, computer control will gradually be promoted.

4. Develop convenient, fast, and accurate construction equipment, with automatic cleaning of the structure after use.

5. Strengthen standardized management of manufacturing testing equipment and instruments, and strengthen quality monitoring of adhesive raw materials, processes, and finished products.

(Source: Internet Integration)

BOND2022

Attention:

Unless otherwise specified, the above parameters are reference values rather than the highest specifications. If you have any questions about this, please contact your sales representative.