Process for coating material with water resistant composition
OwnerRichard C. Nelsoninventor
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Abstract
This invention relates to a process for coating a substratum sheet material, such as woven fabrics, by first removing from the substratum material any moisture that does normally exist therein, and then coating the substratum material with a coating composition with no moisture, air or other impurities being trapped between the substratum and the coating. Novel products produced by this process comprise new compositions of sheet materials having improved weathering characteristics including stability against ultraviolet degradation for improved service in highly transparent or translucent coverings for roofs and solar devices.
Claims9
A continous process for coating a porous fabric sheet in a number of enclosed chambers not exposed to air, comprising the steps of:
- linearly feeding the sheet through a first slit into an enclosed preparation chamber,
- applying hot volatile liquid to the sheet in the preparation chamber,
- feeding the sheet through a second slit into an enclosed vacuum chamber to remove moisture, air and other impurities and remaining volatile fluids from the sheet,
- linearly feeding the sheet through a third slit into an enclosed coating chamber,
- applying a liquid coating to the sheet in the coating chamber,
- feeding the sheet through a fourth slit into an enclosed further processing chamber to dry and cure the coating on the sheet, and
- leaving the further processing chamber by a fifth slit.
Dependencies are inferred from the claim text.