Researchers in Japan have come up with a dry powder pressure sensitive adhesive (PSA). The technology is simple: beads of liquid latex adhesive are coated with nanoparticles of calcium carbonate to form a ‘powder’. As soon as pressure is exerted, the liquid adhesive is freed from its coating and is able to form a bond. This allows the adhesive to be poured in a dry state before it is activated.
As for bond strength, the team found that their powdered adhesive forms a stronger bond and is compatible with more substrates than other pressure sensitive adhesives. Researcher Syuji Fijii from Osaka Institute of Technology says that the new adhesive will be useful when bonding materials in hard to reach places creating a strong bond between intricately shaped parts.
He expects that the adhesive would be suitable for adoption in the automotive, aerospace and electronics industries.