Coating apparatus – Projection or spray type – Rotating work
Patent
1984-08-06
1986-03-04
Beck, Shrive P.
Coating apparatus
Projection or spray type
Rotating work
118320, 118326, B05B 1302
Patent
active
045734291
ABSTRACT:
A process for providing a substrate such as a polyethylene terephthalate container with a gas barrier coating of a copolymer of vinylidene chloride is disclosed. The process includes locating the container to be coated in close proximity to one or more airless spray nozzles and impacting the outside surface of the container with a stream of a stabilized aqueous polymer dispersion such as an aqueous polyvinylidene chloride dispersion. The impacting force of the stable polyvinylidene chloride dispersion on the surface of the container is sufficient to cause selective destabilization of the dispersion at the surface interface to form a gel layer containing the polymer in the continuous phase. This gel layer serves as an adhesive layer for an overlying layer of the aqueous polymer dispersion as a continuous uniform coating. The resulting wet coating does not sag or run off. The coating on the container is then dried in a controlled atmosphere to complete the gel formation throughout its thickness whereupon it is further dried to remove the water from the coating and to collapse the gel to form a film without distorting the container. The dried coating is smooth, uniform and uniformly transparent. In operation, the overspray can be collected and returned to achieve greater than 95% material efficiency. The process can be carried out in a continuous manner to provide a continuously moving series of containers with a uniformly transparent, gas barrier polyvinylidene chloride coating at production rates suitable for commercial applications.
REFERENCES:
patent: 2763575 (1956-09-01), Bede
patent: 3513808 (1970-05-01), Mortimer et al.
patent: 3696987 (1972-10-01), Schuff et al.
patent: 3819403 (1974-06-01), Hogstrom
patent: 3932104 (1976-09-01), Schnedier
patent: 3943219 (1976-03-01), Aoki
patent: 3947176 (1976-03-01), Rainville
patent: 3993577 (1976-12-01), Farrell
patent: 4004049 (1977-01-01), Horwat et al.
patent: 4098932 (1978-07-01), Frische
patent: 4127633 (1978-11-01), Addleman
patent: 4230068 (1980-10-01), Itoh et al.
patent: 4239015 (1980-12-01), Novello et al.
patent: 4300966 (1981-11-01), Hoffmann
patent: 4317793 (1982-03-01), Hubert et al.
patent: 4319701 (1972-03-01), Cambio
patent: 4321029 (1982-03-01), Aoki
patent: 4323341 (1982-04-01), Valyi
patent: 4323411 (1982-04-01), Uhlig
patent: 4370368 (1983-01-01), Hirata et al.
Phillip L. DeLassus, Donald L. Clarke and Ted Cosse, "Saran Coatings on PET Bottles: Application, Performance and Recycle", Revised 3/2/82 (13 pp. article including cover p.).
Cobbs, Jr. Walter H.
Rehman William R.
Beck Shrive P.
Nordson Corporation
LandOfFree
Process for coating substrates with aqueous polymer dispersions does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for coating substrates with aqueous polymer dispersions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for coating substrates with aqueous polymer dispersions will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1589334