Process for coating hot melt adhesives

Details Process for coating hot melt adhesives Process for coating hot melt adhesives

1997-02-24

1999-02-02

Buffalow, E. Rollins

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

264178, 26417717, 2642112, 2642103, 4273722, 4273741, 4273744, 427384, 4273742, B29C 4700

Patent

active

058659277

ABSTRACT:
Hot melt adhesive masses are provided with a tackless surface by a process which comprises the steps of: a) extruding the hot melt adhesive through an appropriate die orifice; b) spraying the surface of the extruded adhesive with a molten film forming low molecular weight polymer or formulated polymeric material, the material being selected so that it will not appreciably detract from the properties of the adhesive composition when remelted therewith; c) heating the surface of the coated adhesive at a temperature and for a period of time sufficient to re-melt the film forming polymer so as to form a continuous coating thereof yet insufficient to appreciably melt the adhesive; and d) cooling the thus coated adhesive mass to a temperature suitable for handling.

REFERENCES:
patent: 2639808 (1953-05-01), Barry et al.
patent: 3941866 (1976-03-01), Ingraham et al.
patent: 4054632 (1977-10-01), Franke
patent: 4334615 (1982-06-01), Butler et al.
patent: 4681712 (1987-07-01), Sakakibara et al.
patent: 4748796 (1988-06-01), Viel
patent: 4755245 (1988-07-01), Viel
patent: 5112552 (1992-05-01), Wittmann et al.
patent: 5160686 (1992-11-01), Thaler et al.
patent: 5257491 (1993-11-01), Royer et al.
"Nordson Hot Melt Continuous Coating System", 1992, Bulletin, Nordson Corporation, Amherst, Ohio.

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