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Kaneka (Osaka, Japan) is  stepping up efforts to develop applications for a recently-developed polyolefin-based hot melt resin. Already, the company has found success in applications in the auto sector, including bonding of interior and exterior components molded from PP with other materials, and the new focus will be on sectors such as appliances and household fittings.

August 6, 2014

1 Min Read
Hot melt adhesive offers bonding solution for PP parts

Kaneka (Osaka, Japan) is  stepping up efforts to develop applications for a recently-developed polyolefin-based hot melt resin. Already, the company has found success in applications in the auto sector, including bonding of interior and exterior components molded from PP with other materials, and the new focus will be on sectors such as appliances and household fittings.

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Bonding of metal and PP in door pillars is one application for Kaneka's new hot melt resin.

Kaneka notes that PP does not readily bond to a variety of material such as metals, other plastics, and fabrics, and often needs to be primed, or surface-modified via plasma or corona treatment. The new hot melt resin, which can be employed in coinjection-insert injection molding processes or in sheet form in thermoforming processes, reportedly renders such treatment unnecessary. Further, processing temperatures and pressures are lower than for conventional hot melt adhesives. Kaneka says that this reduces the possibility of part deformation in thermoforming processes, while the design window is also reportedly widened.

The hot melt adhesive can bond PP to polyamides, ABS, polycarbonate, stainless steel and aluminum, among other materials. Target applications include door pillars, door trim, instrument panels, spoolers, and roofs. For example in the case of instrument panels, Kaneka's resin could be employed to bond the polypropylene instrument panel structure tow leather, fabric or foam sheet.

In the appliance and electronics sector, the company is looking at bonding of decorative sheet, metals and other resins for TV housings, mobile devices, and household appliances. Kaneka is also targeting use of the hot melt resin in conjunction with resins such as PET, EVA, acrylic and carbon fiber-reinforced plastic (CFRP).

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