On-Site Plastic Powder Spraying

摘要

The coatings industry, like so many others, has become increasingly concerned with environmental problems and continually seeks methods and materials that are less hazardous and wasteful. Among the concerns are the environmental problems associated with VOCs, which led the U.S. Environmental Protection Agency (EPA) to embark on a program to remove VOC-bearing coating materials from the market as alternatives became available. This effort continues today with increased urgency. Painting contractors facing increasing regulatory pressure in the use and handling of all paints are looking for viable alternatives. Beginning in the 1960s, electrostatic powder spray process (EPS) became the standard for applying organic polymer coatings. This process is commonly referred to as "powder coating," which means EPS is applied to plastic powder coatings followed by oven curing at approximately 400 deg F, where melting and film formation take place. In the early to mid 1980s, having little or no VOCs was one of the recognized benefits of factory powder coating.