Manufacturing process for channel seal

Details Manufacturing process for channel seal Manufacturing process for channel seal

1982-04-05

1983-07-12

Dawson, Robert A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

24201C, 24201R, 150 3, 156164, 156204, 15624425, 156459, 156465, 156499, 156500, 156578, 229 48SB, 229 48T, 229 62, 264177R, 264259, 425104, 425105, 425111, 425113, 428 35, 428358, B29C 2400, B65D 3324

Patent

active

043928978

ABSTRACT:
Molten thermoplastic, such as polyethylene, and a hot melt adhesive are coextruded through a channel shaped profile die. While still molten, the channel shaped strip, having adhesive between the ribs thereof, is brought into contact with a moving web of a thermoplastic, e.g. polyethylene film, which is backed up by a roll at a controlled temperature. The temperature differential between the roll and the molten thermoplastic is maintained so that the thermoplastic adheres to the moving web upon contact and thereafter cools to set the thermoplastic in the channel shaped profile. The web is under tension so that contraction of the film upon release compensates for the contraction of the channel shaped strip as it cools.

REFERENCES:
patent: Re28969 (1976-09-01), Naito
patent: 2899347 (1959-08-01), Kindseth
patent: 3060985 (1962-10-01), Vance et al.
patent: 3154239 (1964-10-01), Madsen
patent: 3217934 (1965-11-01), Schneider et al.
patent: 3256941 (1966-06-01), Rivman
patent: 3339606 (1967-09-01), Kugler
patent: 3942713 (1976-03-01), Olson et al.
patent: 3990627 (1976-11-01), Olson
patent: 4186786 (1980-02-01), Kirkpatrick
patent: 4354541 (1982-10-01), Tilman

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