TAGS: Hot-melt Adhesives Reactive Adhesives
Showa Denko (SDK) has developed WelQuick™, an adhesive for bonding dissimilar materials together, such as resins and metals.
There are many methods to bond dissimilar/ multi-materials, such as bonding with liquid adhesives or hot-melt adhesives, and mechanical fastening with bolts. Though manufacturers demand simple, easy and timesaving bonding process while securing enough adhesive strength. However, simultaneous achievement of simplicity and adhesiveness has been difficult.
Easy to Handle Adhesive with CO2 Reduction
WelQuick™ eliminates the process to apply liquid components, a necessary process for reactive adhesives. WelQuick™ is easy to handle and shortens bonding time to a few seconds by utilizing the phase change*
1 between solid and liquid.
WelQuick™ can bond resins and metals. The former includes polycarbonate, polyethylene terephthalate and nylon, while the latter includes aluminum, iron and copper. WelQuick™ can achieve shear adhesive strength*
2 of more than 10MPa*
3 with more than 40 combinations of base materials.
Furthermore, films of WelQuick™ can be stored at room temperature for long periods. WelQuick™ does not produce volatile organic compounds (VOCs) when welded and lowers the burden on the environment.
WelQuick™ contributes to customers’ cost reduction and reduction of CO2 emission through improvement in efficiency of production processes.
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Phase change: Changes in the state of material (gas, liquid and solid) caused by changes in temperature and pressure. WelQuick™ technology utilizes liquefaction of solid and solidification of liquid.
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Shear adhesive strength: Adhesive strength that acts on the surfaces of adhered materials parallel to adhered surfaces when the base materials are pulled to opposite directions to slide laterally.
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MPa (Mega Pascal): The SI unit of pressure. If the two sample materials show shear adhesive strength of 10MPa, one square centimeter of adhered surface requires forces of about 100kg to be peeled off.
Source: Showa Denko