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Epoxy Adhesives – One Component
One part epoxy compositions are designed to eliminate waste, accelerate productivity while alleviating concerns regarding mix ratios, weighing, working life and shelf life.
Specially formulated one component epoxy systems feature outstanding performance properties, long-term durability and easy application. These no mix compounds are employed in the electronics, aerospace, medical, electrical, automotive, oil/chemical processing and optical industries.
In thermal curing epoxies latent curing agents are blended into epoxy resin single component formula so that shelf-life stability is maintained before heat activation at specified temperature.
Most one-part systems require a temperature of 125°C to 150°C for curing. They fall into three categories based on temperature and curing time: conventional, fast and snap curing. Meanwhile Low temperature heat cure (80°- 100°C) one component epoxy systems are available. For UV light curing epoxies, the reaction is activated by a suitable light source at the proper intensity and wavelength. This type of systems offers fast cure speeds and lower energy consumption.
Epoxy Glue , Two Components
Covalent bonds between the epoxide groups of the resin and the amine groups of the hardener (catalyst) that arise from this combination afford for the cross-linkage of the polymer, and thereby dictate the rigidity and strength of the epoxy. catalyzation of two component epoxy systems occurs at ambient temperatures and can be accelerated by heat.
Epoxy is highly versatile and extremely strong, making it perfect for DIY projects. It is also a gap-filler, which makes it perfect for reconstructions. On top of that, epoxy can be sanded, drilled and painted. This gives it a much wider range of uses than standard glue.
Two component epoxy systems are suitable for bonding most surfaces. They are considered highly stable due to their ability to withstand a constant weight or force over an extended period of time, as well as their resistance to physical and chemical influences.
Ethylene-Vinyl Acetate Hot Melt Adhesives
The composition of the adhesive will directly influence its properties. Because they can be specifically formulated for various applications, there are several kinds available on the market.
Ethylene promotes adhesion to non-polar substrates such as polyethylene, and provides mechanical strength, block resistance, and paraffin solubility. Vinyl acetate, on the other hand, promotes adhesion to polar substrates such as paper, and provides flexibility, adhesion, and better low-temperature performance.
EVA adhesives bond to the broadest range of substrates, function in one of the widest temperature range for hot melt adhesives, and they are very affordable. EVA hot melt adhesives generally require an application, or melting temperature of 350 degrees F, and have a wide viscosity range of between 900-3,000 cPs. EVA adhesives can function in temperatures as low as -40 degrees F and as high as 160 degrees F, depending on the formulation.