Fleece
Fleece turns up in 2 fields: waterproofing, nonwovens. Here is what it means to the people in each one.
Fleece in waterproofing
A non-woven fabric backing applied to sheet membranes to improve adhesion or act as a separator.
A layer of synthetic fibers, usually polyester, bonded to the underside of a single-ply waterproofing or roofing membrane. The fabric provides a textured surface that grips liquid adhesives or hot asphalt much better than bare plastic or rubber. It also acts as a cushioning layer over rough substrates and prevents chemical migration between incompatible materials.
"We're using a fleece-backed PVC so we can adhere it directly over the old asphalt roof."
Fleece in nonwovens
European name for an unbonded or lightly bonded fiber web or batt, from the German word Vlies.
In European mills and translated machine manuals, fleece means the fiber web itself, so a fleece is formed, laid and then bonded. English-speaking engineers say web or batt instead, which causes confusion because consumers know fleece as a brushed knit garment fabric. The same root gives Vliesstoff, the German word for nonwoven.
"Fleece weight after the lapper is 320 grams, so the needle loom stays at the old stroke rate."