3 Main Types of Resins
Resins can be synthetic or natural organic compound and are usually adaptable to polymers. These are sturdy and extremely adhesive liquid substances. Resins are typically used these days in fibreglass, aramid (kevlar) and carbon fibre. There different types of resin available in the market. However, there are three main types of resins that are most widely used namely epoxy, vinylester and polyester resin. Each type has a different function and characteristic. Shown below are the briefly discussed main types of resin.
Epoxy Resin. Among the three types of resin, this is probably the most expensive one but worth spending as it is three times stronger compared to another type of resins. Epoxy resin adheres to aramid (kevlar), carbon fibre and fibreglass. It works well and creates an essentially leak-proof barrier to most materials.
Epoxies are clear, have a slightly amber colour and contains protection against UV. Most resins are cured with a catalyst. Epoxy differ from other types of resins as it is cured with hardener. The hardener is often used to cure epoxy through an addition reaction. When these two materials are combined, it shows up in the chemical reaction. Once the epoxy is exposed to water, there is a possibility for it to turn yellow. This type has an exquisite moisture and chemical resistance, great resistance to heat, exceptional electrical properties, low shrink at the time of cure environmental degradation resistance, fine adhesion properties and water degradation resistance.
The innumerable uses of epoxy never cease to increase. Epoxies are typically used in linings, floorings, industrial and surface coatings, general purpose adhesives, laminates and propellers.
Vinylester Resin. This resin is around one-third of the epoxy resin’s strength. It adheres badly on aramid (kevlar) and carbon fibre. However, it can still be used to these fibres for some creative applications. Vinylester is basically used with a fibre glass. On the other hand, it can also primarily be used with carbon for some cosmetic applications if a polyester based gel coat or a polyester clear coat is necessary. Take note that vinylester resin should not be used with an aramid fabric or with a carbon in case that strength is the dominant requirement. Urethane based clear coats could also be used with epoxies.
Polyester Resin. This is also one of the most widely used types of the resins. In addition to this, this is also the cheapest in terms of the price of all the resins. Polyester resin should not be used to any aramid work or structural carbon since this type has a poor capability in bonding. No one should generally attempt to use this to structural applications that have carbon aramid or fibre.
Typically, it can only work properly with fibre glass. However, there are still some great deals about using polyester resin since it has an exceptional resistance to heat, supreme flexibility in processing, flame and chemicals, low cost, exquisite electrical and mechanical features. Polyester Resin is basically used in skis, fishing rod, laminate, construction, coatings, decorative accessories, bottles, plane and ship components and auto-repair of fillers.