Method of laser slitting and sealing two films

Details Method of laser slitting and sealing two films Method of laser slitting and sealing two films

1998-08-10

2000-08-15

Ball, Michael W.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

1562728, B32B 3100

Patent

active

061030503

ABSTRACT:
A method for slitting and sealing a lamination having a polyethylene layer and a coextruded film having a nylon.TM. layer. The improvement comprises slitting and sealing the two films with a laser generated light beam. The films are co-wound such that the coextruded film is closest to the laser. The laser slits the coextruded film first and thereafter the lamination. The polyethylene side of the lamination is positioned closest to the laser and is slit prior to other layers of the lamination. The method allows the polyethylene more time to absorb the energy from the laser and takes advantage of the efficient energy absorbing characteristics of the nylon.TM. in the coextruded film, resulting in improved slitting and sealing rates.

REFERENCES:
patent: 4414051 (1983-11-01), Bose
patent: 4490203 (1984-12-01), Bose
patent: 5314767 (1994-05-01), Bussard
patent: 5455129 (1995-10-01), Bussard
patent: 5500503 (1996-03-01), Pernicka et al.
patent: 5502292 (1996-03-01), Pernicka et al.
patent: 5630308 (1997-05-01), Guckenberger
patent: 5804020 (1998-09-01), Akao et al.

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