Download
1 / 8
80 likes | 95 Views
Shawar's high quality Epoxy Adhesive best made for construction industry. Its best suited for concrete pillars, roads, granite, wood fixing, metals & marble<br>
E N D
Adhesives are a wide category of materials that are used to bind surfaces, we also know them as glues and cement. To put it in very simple terms, adhesives are substances that are used for sticking objects or materials together. In more technical terms, the substances that stick together, regardless of what they are, become known as "substrates." Many types of adhesives are designed for specific purposes, depending on the industry requirements and the substrates that need to be bonded together. For example, there might be a special glass adhesive for aquarium glasses, but a completely different one for a coffee table or a car window. Keeping in mind the unique and specific need, each has its own unique formula and base. Binding materials together using an adhesive is called bonding. If we compare adhesives to other methods of joining like welding or mechanical fastening, the bonding with adhesive can reduce the time and expense of assembly along with giving a better stress distribution to the bonded materials. The durability and reliability of adhesives have advanced to a great extent. Adhesives are widely employed throughout the construction industry for permanent, semi-permanent, and temporary binding purposes in various residential, commercial, and industrial applications. Adhesives can be found in nature in natural form or can be Best Adhesive Manufacturer by Waterproofing Company in India synthetically. There are various types of adhesives that are used in construction, some of them are listed below.
1. Polymer Adhesive A polymer adhesive is a synthetic bonding material produced from polymers and is regarded to be with more strength, more flexibility, and greater impact resistance than other forms of adhesives. Polymer adhesives can be broadly divided into thermoplastic, or thermosetting, depending on their molecular structure. 2. Resin Adhesive A resin adhesive is a very strong and durable adhesive. Once applied, it makes a very tight and strong bond very fast. The resin adhesive does not shrink or contract owing to changes in temperature and humidity and has great resistance to damage from harmful UV rays. These adhesives have the ability to resist high levels of heat as well as a wide range of chemicals. They are also extremely resistant to moisture and thus can be used in all types of underwater applications like swimming pools etc. 3. Epoxy adhesives Epoxy adhesive is a thermosetting type of adhesive that is made up of a resin or epoxy polymer and a hardener that aids in adhering or joining a variety of surfaces together with a strong, permanent, and durable bond that can withstand extreme stress and hostile weather conditions. Epoxy adhesives are the most commonly used industrial adhesives. The durability of the cured product, as well as its ability to stick to a broad range of materials, makes epoxy adhesive a very popular choice.
4. Anaerobic adhesives Anaerobic adhesives and anaerobic sealants are the types of adhesives that cure in the absence of air or oxygen, hence the name anaerobic. They are specially designed for fastening and sealing applications in which a strong seal must be formed without light, heat, or air. They have lesser toxicity and odor than acrylic adhesives and are generally used for metals and glass. Substrate, or material compatibility, is a major consideration while choosing anaerobic adhesives and anaerobic sealants. 5. Acrylic Adhesive An acrylic adhesive is a resin-based, two-part adhesive made up of acrylic or methyl acrylic polymers. They are known for their extreme strength and efficiency in binding multiple objects together and bear a high resistance to environmental factors. Because of being high-quality structural adhesives, acrylic adhesives are very popular and have a high demand. They are also inexpensive, so they can be a very useful and practical solution in many projects. Acrylic adhesives bond easily to a wide range of materials and look good also. These features give them great flexibility in terms of applications in the industry.
6. Polyimide adhesives Polymide are synthetic polymers that generally contain solvents. They are known for their exemplary strength, heat, and resistance to chemicals, as well as their performance in extremely high temperatures. They usually come in two formulations, thermoset, and thermoplastic, and they are mainly used for coating or electronic insulation 7. Pressure-sensitive adhesives (PSA) Pressure-sensitive adhesives (PSA) are physically hardening systems that have the main characteristic of permanent tackiness. Bonding happens by applying pressure on the adhesive film, the more and higher pressure is applied, the better the adhesion. Pressure-sensitive adhesives are the types of adhesive that are usually used for precoating due to their feature of permanent tack which permits the joining of the substrates before as well as after the adhesive has been set and cured. This allows the bonding to be carried out independently of the adhesive application in a different place and at a different time. They are usually formulated from natural rubber, and few synthetic rubbers, and polyacrylates.
8. Hotmeltadhesives (HMA) Hotmelt adhesives (HMA), typically known as hot glues, are solid formulations that are based on thermoplastic resins. They remain solid at room temperature but can be softened, reshaped, and dispensed if subjected to heating above their softening point. Solidification takes place again only a few seconds after dispensing and once they reach room temperature, these thermoplastic adhesives reach full strength. This largely reduces the clamp time and therefore allows for rapid assembly. Hot melt adhesives are also very easy to clean and have almost no toxicity. Their application and bonding have the flexibility of easy automation. They have extremely good gap-filling capabilities and can bond a wide range of porous and non-poro us substrates. The manual application can be easily done with hand-held electrical hot glue guns. The adhesive is usually supplied in solid form as cylindrical glue sticks that are melted in the gun. Bonding of the parts is carried out as soon as it is applied or after reheating the solidified adhesive layers. Hot melt adhesives generally have a long shelf-life and their disposal can be done without any special precautions.
9. Water-based Adhesives Water-based Adhesives are usually manufactured from natural polymers and soluble synthetic polymers. These adhesives can be stored and sold as solutions or as dry powders which must be mixed with water before their application. The adhesive attains its strength when water is lost from the glue line by either evaporation or absorption by the substrate. Due to this requirement, the use of these adhesives demands that at least one substrate is permeable 10. Solvent Based Adhesives These are known as binding agents and are dispersed in an organic solvent. After the evaporation of the solvent, the adhesive takes its final solid form from the liquid state. The purpose of these relatively highly volatile solvents is to facilitate easy transport and application of the adhesive.
11. Reactive Adhesives These types of adhesives need a chemical reaction for bonding two surfaces. The main feature of reactive adhesives is the formation of permanent bonds between substrates to provide better resistance to chemicals, moisture, and heat. With growing technology and evolution adhesive manufacturers are working and spending extensively on research and development for the compilation of properties of two or more materials to get the desired results. With the passage of time and in course of their development, adhesives have attained a stable position in an ever increasing number of production processes.
