Bonding element having separate heating and agitating particles

Details Bonding element having separate heating and agitating particles Bonding element having separate heating and agitating particles

1975-12-04

1977-07-12

Lesmes, George F.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

156272, 219 1053, 264 26, 264248, 428323, 428900, B32B 516, B32B 2700

Patent

active

040355470

ABSTRACT:
A technique for bonding plastic materials includes placement of minute particles at the interface, either between the interface surfaces or within one or both of the interface materials. A particle-moving field, such as an alternating magnetic field where magnetic particles are employed, is created across the interface to directly and correspondingly impress the alternating magnetic field on the magnetic particles while the interface is in a generally movable or yielding state. The alternating magnetic field continuously moves the particles and by proper orientation causes them to oscillate, rotate or otherwise move within the fluid interface material to move and intermix the plastic material and thereby produce an improved interface bond between the materials. The magnetic particles may be selected to also respond to a radio-frequency magnetic field to rapidly generate heat and thus simultaneously create the fluid material at the interface with the material agitation. The magnetic particles may further include particles to reduce the reluctance of the flux path to increase the magnetic intensity.

REFERENCES:
patent: 2393541 (1946-01-01), Kohler
patent: 3391846 (1968-07-01), White
patent: 3574031 (1971-04-01), Heller et al.
patent: 3676273 (1972-07-01), Graves
patent: 3730804 (1973-05-01), Dickey
patent: 3923580 (1975-12-01), Leatherman

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