Process for heat sealing packages

Details Process for heat sealing packages Process for heat sealing packages

1989-11-09

1991-05-14

Ball, Michael W.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

1562751, 156285, 1563084, 1563088, B32B 3100, B32B 3120, C09J 502

Patent

active

050153137

ABSTRACT:
A sealing process for producing clean, contamination-free seals. The process includes the step of incorporating a small amount of polar liquid within the material to be sealed between heat-sealable layers. An alternating electromagnetic energy field, such as that produced by a dielectric heating device, is applied to the seal area. The energy vaporizes the polar liquid, thereby cleaning the seal area. Subsequently, the energy causes the resinous layers to seal together, sealing the material within the package. A preferred composition for sealing within the resinous package is also disclosed. The material includes a polar liquid, a surfactant, wax, oil and microbeads. The material is especially suited for producing padding devices.

REFERENCES:
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patent: 4604318 (1986-08-01), Prior et al.
patent: 4857129 (1989-08-01), Jensen et al.
Farkas, R. D., Heat Sealing, Reinhold Publishing Corp., New York: 1964, p. 81.

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