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We all know the introduction and application of building glue. As the name suggests, construction glue is a kind of glue often used in construction sites, that is, a product we can often see on construction sites. It is indispensable to the construction site. If there is no such product, there is no way to build a construction site. With the development of society, many products are mainly used in our basic life after they are invented. In other words, in order to provide ourselves with more and greater convenience and adapt to the development of the whole society, we have such products to correspond to. Building adhesives are widely used in construction sites. It is a kind of material that must be used in the construction site. Mainly because of its many physical and chemical properties, many aspects of our process have…
Because of its unique anaerobic curing characteristics, anaerobic adhesive can be used for locking, sealing, fixing, bonding, plugging, etc. Anaerobic adhesive has become an indispensable liquid tool in mechanical industry. Widely used in aerospace, military, automotive, machinery, electronics, electrical and other industries. 1. locking and locking. Metal screws are easy to loosen when subjected to impact and vibration. The traditional mechanical locking method is not ideal, while the chemical locking method is cheap and effective. If the screw is assembled after adding anaerobic adhesive, a strong plastic gel will be formed in the thread gap after curing, so that the screw will not loosen. At present, there is a kind of pre coated anaerobic adhesive, that is, pre coated on the screw, placed for use, and screwed into the screw to achieve the ideal anti loosening effect. 2. Sealing and…
Adhesives are widely used in Metro, light rail, EMU and other rail transit vehicles, such as the sealing of automobile windshield and side window glass, the bonding of ground cloth, the bonding of top plate and side wall panel, the bonding of interior trim, etc. Different bonding positions and bonding substrates, such as cold resistant materials, require different adhesive types and processes. Only by selecting the appropriate adhesive and following the correct construction process can the bonding effect be maximized. Take floor cloth bonding as an example, as follows: PVC or synthetic rubber is the common base material of rail transit floor cloth, aluminum honeycomb is the main base material of vehicle floor, and there are also a few wood floors or carbon fiber composites. The bonding area of the floor cloth is large. If the bonding fails, the appearance…
Industries around the world are catching up with the improvement of modern structural tape. Because of its various uses, structural bonding technology has replaced the traditional assembly methods, such as riveting and welding. Nowadays, almost every consumer product has oneortwo kinds of structural adhesives. Throughout, structural adhesives have been helping some of the most innovative and mature OEMs simplify their product lines and maximize process efficiency and finished product quality. Structural adhesive is not only applicable to almost all parts, but also stronger and more reliable than mechanical fasteners such as bolts, rivets and welding. Adhesive has many advantages and few disadvantages. It is an excellent choice for many manufacturers. Three types of adhesives are commonly used in structural bonding applications: epoxy, acrylic, and polyurethane. The choice of adhesive depends on the material to be bonded, the operating environment and…
Adhesives are widely used in the electronics industry, from microcircuit positioning to giant generator coil bonding. Once the adhesive fails, the consequences will be very serious, the computer will stop running, the city will be dark, or the missile launch will be difficult. In addition to mechanical fixation, the application of adhesives in the electronic industry also requires heat conduction, conductivity and insulation to meet the requirements of impact resistance assembly, sealing and protection of substrates. The characteristics required for different applications include: the service life ranges from a few seconds to several years, and the dosage ranges from less than micrograms to more than 1 ton. 1、 Application of various adhesives in electronic industry 1. Epoxy adhesive: it is the most widely used in the electronic industry. It has the advantages of strong versatility, excellent adhesion, wide adaptability, convenient…
Adhesives are usually liquid or paste. These adhesives need to be cured before they can work. Therefore, the curing process of adhesive is also very important. If the curing is not good or you do not know what to pay attention to when curing, it will have a great impact on the bonding of the articles. Even if you use a good adhesive, it may affect the bonding effect. Adhesive curing reaction is a process to obtain and improve adhesive strength and other properties through chemical reactions (polymerization and crosslinking). Curing is the key process to obtain good adhesion. The strength can be maximized only when fully cured. Curing is divided into initial curing, foundation curing and post curing. 1. preliminary curing At a certain temperature, after a period of time to reach a certain strength, the surface has hardened…
With the development of "three and three technologies", the trend of "lightweight and intelligent automobile" has been mentioned for two years. The lightweight of automobile is to reduce the body weight as much as possible on the premise of ensuring the strength and safety performance of automobile, so as to achieve the purpose of energy conservation and emission reduction. What are the benefits of lightweight for cars Experiments show that if the vehicle weight is reduced by 10%, the fuel efficiency can be improved by 6-8%; For every 100 kg reduction in vehicle curb weight, the fuel consumption per 100 km can be reduced by 0.3-0.6 L; The vehicle weight can be reduced by 1% and the fuel consumption can be reduced by 0.7%. How can lightweight improve safety performance? 1. The lightweight optimization design of automobile structure can reach…
Intermediates connecting the two materials mostly appear as water agents, which belong to fine chemical industry and have a wide variety. They are mainly classified by adhesive, physical form, hardening method and material of adherend. In short, three viscose, seven craft Precautions for adhesive selection1、 Storage period1. Each product has a storage period. According to international and domestic standards, the storage period refers to the condition of normal temperature (24 ℃). Acrylate adhesive is 20 ℃. 2. For acrylate products, the higher the temperature, the shorter the storage period. 3. For water-based products, if the temperature is below minus 1 ℃, it will directly affect the product quality. 2、 Intensity1. There is no universal adhesive in the world. For different adherends, it is best to choose special adhesive. 2. If the strength of the adherend itself is low, it…
Adhesives are widely used in electronic industry, from micro circuit positioning to giant generator coil bonding. Once the adhesive fails, the consequences will be very serious, the computer will stop running, the city will be dark, or it will be difficult for the missile to launch. In addition to mechanical fixation, the application of adhesive in electronic industry also requires heat conduction, conductivity and insulation, and meets the requirements of impact resistant assembly, sealing and protecting substrate. The characteristics required for different applications include: service life ranging from a few seconds to a few years, dosage ranging from less than micrograms to more than 1 ton, etc. 1、 Application of different kinds of adhesives in electronic industry 1. Epoxy adhesive: it is most widely used in the electronic industry because of its strong universality, excellent adhesion, wide adaptability, convenient…
（一）Concept of epoxy resinEpoxy resin refers to the general name of polymer compounds containing two or more epoxy groups in the polymer chain structure. It belongs to thermosetting resin, and the representative resin is bisphenol A epoxy resin. （二）Characteristics of epoxy resin (usually refers to bisphenol A epoxy resin)1. The application value of epoxy resin alone is very low. It needs to be used in combination with curing agent to have practical value. 2. High bonding strength: the bonding strength of epoxy resin is in the forefront among synthetic adhesives. 3. The curing shrinkage rate is small, and the shrinkage rate of epoxy resin adhesive is the smallest among adhesives, which is also one of the reasons for the high curing bonding of epoxy resin adhesive. For example: phenolic resin glue: 8-10%; Silicone resin adhesive: 6-8% Polyester resin glue:…