When students learn American and metric measurements, most find it easy to convert feet to meters and kilometers to miles. The names of these dimensions sound somewhat similar to one another, and these units are used often in everyday life. But when wading into unfamiliar territory where the dimensional units all sound similar, such as mils, millimeters and microns, conversion between these units of measurement can become confusing.
A single mil of thickness can be translated to a gauge of thickness by a simple conversion. Both are dimensions in the English measuring system, not the metric system. Do not confuse mil with millimeter or micron, however. Millimeters and microns are metric measurements. When comparing mil thickness and gauge thickness, the following relationships exist: 1 mil = 0.001 of an inch = 100 gauge = 0.0254 mm.
20-Mil Plastic Usages
Twenty-mil plastic is often used as geo-barrier plastic sheeting. Manufactured with a nylon mesh, rip-preventing layer, this product creates a vapor barrier and erosion prevention tool in landfills and landscaping. Twenty-mil plastic is also used as a vapor barrier in home construction projects and crawlspaces. Twenty-mil polyethylene or vinyl is much thicker than 20-gauge plastic film and would make the best pool liner.
According to the relationship listed in Section 1, a 20-gauge plastic pool liner would be 0.0002 inches thick plastic sheeting. A 20-mil plastic pool liner would be 0.02 inches thick. The difference between one gauge plastic and one mil plastic is a factor of 100.
20-Gauge Polyethylene Usages
Twenty-gauge clear vinyl film is often used as window film and shower curtains. Clear plastic runners that protect tabletop cloths or protect upholstered seats are often made with 20-gauge clear vinyl film.