The engineer in the Department of Chemical Engineering and Petroleum Industries, Fatima Adi Ali Magdy, wrote a scientific article entitled (Adhesives and methods of manufacturing them)<br />The content of the article was:<br />Adhesives are essential components used in many industrial and everyday applications. They are used to fasten and fit various objects together, whether small or large, and play a vital role in improving the performance, sturdiness and durability of the finished products. In this article, we will take an overview of adhesives and their manufacturing methods. Adhesives consist of a combination of different components that work together to achieve adhesion strength and surface adhesion. Adhesives are manufactured using several methods, which are as follows:1. Melt manufacturing: Some adhesives are manufactured by melting components in a soldering liquid or solvent.<br />After the liquid is removed, the final adhesive is left in solid form. This method is used in the manufacture of some types of thermal adhesives and photosensitive adhesives.<br /><br />2. Polymerization: This method relies on a chemical reaction called polymerization, in which liquid components are converted into solids. This process is activated by adding radical exchange materials or ion exchange materials. This method is used in the manufacture of adhesive and pressure-sensitive adhesive.<br /><br />3. Thermal reaction manufacturing: This method relies on a thermal reaction that occurs at high temperatures. The liquid components are heated together to activate the reaction<br />In continuation of the article, there are some other methods used in manufacturing adhesives, which are as follows:4. Chemical reaction manufacturing: In this method, liquid ingredients are mixed together to activate a chemical reaction that leads to the formation of the final adhesive. This method is used in the manufacture of epoxy adhesive and acrylic adhesive.5. Radiation reaction manufacturing: This type of manufacturing relies on the use of radiation such as ultraviolet rays or electromagnetic rays to activate the chemical reaction between liquid components. This method is used in the manufacture of light-sensitive adhesive and heat-sensitive adhesive. We must note that the process of manufacturing adhesives requires taking into account many factors such as temperature, pressure, time, and the chemical composition of the components.