preheat roll

preheat roll

[′prē‚hēt ‚rōl]
(engineering)
In plastic-extrusion coating, the heated roll between the pressure roll and the unwind roll; used to heat the substrate before it is coated.
References in periodicals archive ?
It also has an S-wrap of two rubber pull rolls turning three to four times faster than the preheat rolls to stretch the film.