Importance

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Abstract

A permanently magnetized adhesive or sealant is disclosed which preferably comprises a synthetic resin material having a permanently magnetized substance dispersed therein to give the adhesive a substantially permanent, net magnetic field both before and after application and use thereof. The adhesive is advantageously in the form of a self-sustaining strip or the like which can be magnetically fastened to a metallic joint and be shifted thereon as desired to assure proper positioning of the adhesive; heating of the adhesive strip to render the same partially flowable then causes the adhesive directly adjacent the joint to be 'pulled' into the latter by virtue of magnetic attraction to produce an effectively sealed joint. The adhesive is preferably manufactured by admixing the desired synthetic resin and other components with a quantity of a magnetizable substance such as barium ferrite, BaFe.sub.12 O.sub.19. The admixture is then formed into a shape-retaining body such as an elongated strip, and the dispersed ferrite is permanently magnetized by electrical means to give the strip a net magnetic field. The adhesive hereof finds particular utility in sealing metallic joints in automobile bodies or appliances during manufacture thereof which are difficult or impossible to seal using conventional viscous, flowable adhesives.

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First Claim