Coating processes – Coating remains adhesive or is intended to be made adhesive
Patent
1985-05-02
1987-04-28
Dawson, Robert A.
Coating processes
Coating remains adhesive or is intended to be made adhesive
118261, 118612, 156578, 427428, 428 95, B05D 510
Patent
active
046613803
ABSTRACT:
An improved system and method for applying adhesive to a secondary backing fabric for adhesively laminating the secondary backing to a carpet. A secondary backing fabric is conveyed along a path at a predetermined speed, while an adhesive is deposited onto the surface of a casting roller rotating in a direction opposite to the direction of movement of the secondary backing fabric. A doctoring means spaced a predetermined distance from the surface of the casting roller doctors the adhesive into a layer of predetermined thickness on the casting roller. The secondary backing fabric is then brought into contact with a portion of the adhesive-coated casting roller so that a layer of adhesive is transferred onto the backing fabric. The method for transferring the doctored layer of adhesive from the casting roller to the backing fabric is to pass the backing fabric between the casting roller and a press blade positioned to press the backing fabric against the casting roller and to permit the backing fabric to be withdrawn from the adhesive layer in an arc-shaped path. In this manner, a uniform coating of adhesive is applied to the surfaces of the secondary backing fabric which are to come into contact with the back surface of the carpet while avoiding the wasteful coating of non-contacting surfaces. The secondary backing fabric is then brought into intimate contact with the back surface of the carpet to form a laminated structure. The resulting laminated carpet product exhibits high delamination strength while maintaining economy of construction.
REFERENCES:
patent: 2534321 (1950-12-01), Taylor
patent: 3864195 (1975-02-01), Patterson
patent: 3878814 (1975-04-01), Braston
patent: 4375970 (1983-03-01), Murphy et al.
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