Method for powder coating plastic articles and articles made thereby
AssigneeIllinois Tool Works Inc.
InventorsDavid E. Fredericksen, George M. Vollrath, Algis P. Suopys, Guy L. Rosenthal
Life of this patent
Estimating the term…
Abstract
A method for powder coating articles includes the steps of preheating the article to a preheating temperature, coating the article with a polymeric powder coating having a cross-linking temperature that is above the preheating temperature and curing the article having the powder coating applied thereto at a curing temperature. The curing temperature is between the powder coating cross-linking temperature and the melting point temperature of the articles. A system for carrying out the coating method is disclosed as is an article made by the method.
Claims21
A method for powder coating articles comprising the steps of:
- preheating the article to a preheating temperature;
- coating the article with a polymeric powder coating, the polymeric powder coating having a cross-linking temperature that is above the preheating temperature;
- and
- curing the article having the powder coating applied thereto at a curing temperature, the curing temperature being between the powder coating cross-linking temperature and the melting point temperature of the articles.
A method for powder coating articles comprising the steps of:
- preheating the article to a preheating temperature below a melting point temperature of the article;
- coating the article with a first polymeric powder coating, the first polymeric powder coating having a first cross-linking temperature that is above the preheating temperature;
- curing the article having the first powder coating applied thereto at a first curing temperature, the first curing temperature being between the first powder coating cross-linking temperature and the melting point temperature of the articles;
- coating the article with a second coat of polymeric powder coating over the cured first coating, the second coat of polymeric powder coating having a second cross-linking temperature, the second coat of polymeric coating being applied over the first coat of powder coating at a temperature below the second cross-linking temperature;
- and
- curing the article having the second coat of powder coating applied thereto at a second curing temperature, the second curing temperature being between the second cross-linking temperature and the melting point temperature of the article.
Dependencies are inferred from the claim text.