Change Update Of Contact Entry Form Flow Chart Sign Off A Brief History of Adhesive

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A Brief History of Adhesive

The concept of glue is fairly simple; is a compound, usually in a liquid or semi-liquid state, that binds objects together. Various forms of glue have been in use since 72,000 BC. n. No., as evidenced by the fact that they were found in Sibudu Cave in South Africa and date from this period. Adhesives today have come a long way from the natural adhesives found in Sibudu Cave of plant gum and red ocher, and even from the more complex adhesives used 6,000 years ago on pottery when someone no doubt carelessly dropped or knocked over a coffee table from her. Funny how times move on but things never change. We still need to fix things, and glues have been around for 74,000 years to help us fix our mistakes. There are many types of adhesives on the market today. Whether your application is for your home or you need an industrial adhesive, you should find what you’re looking for here.

The most common glues are drying glues. They come in two types, the first being solvent based adhesives such as white glue, contact adhesives and rubber cements. They all have different levels of adhesion depending on their chemical composition. Others are polymer dispersion adhesives. These milky white types of glue are often based on polyvinyl acetates. They are mostly used only in the woodworking, packaging and textile industries, they are also used to make speaker cones.

Pressure sensitive adhesives work by forming a bond with slight pressure. A bond occurs because the glue is soft (or wet) enough to flow and adhere. The strength of a bond is due to its resistance to separation. Temporary adhesive sheets also fall into this category, their ability to stick and peel repeatedly is related to their soft grip, which is good for light weight applications that involve multiple uses.

Contact adhesives are used for strong bonding with high shear resistance, such as gluing Formica to a wooden counter, sealing artificial turf, and attaching the soles of your shoes to your uppers. The overall composition is made of natural rubber and polychloroprene. Both undergo deformation crystallization, requiring the adhesive to be applied to both surfaces and allowed to dry before the two surfaces can be assembled together.

Hot glues are thermoplastics that are applied in molten form in the temperature range of 65-180 degrees Celsius. After cooling, they solidify and form strong bonds between different types of materials. These are popular for crafts using a glue gun. This type of adhesive was invented to work in more humid climates where water-based adhesives did not work.

The last thing I want to look at is natural glues. These are derived from organic substances such as vegetables, starch, resins and animal casein. They are commonly used in bookbinding and wood joining, but are slowly being replaced by synthetic adhesives. Although animal glue still remains the glue of choice for professional musicians. You cannot achieve a natural sound with artificial glue.

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