METHOD OF AND APPARATUS FOR THERMALLY SENSITIVE UNIFORM HOT MELT COATED WEBS

摘要

Uniformity of hot melt coatings on thermally sensitive plastic and other webs (1) is maintained by use of a silicone or other rubber-like web back-up roll (R1) the dimensional stability of which is maintained during hot melt coating of the webs (1) by a heat-conducting idler roll (R2) directly contacting the back-up roll (R1) temperature and a heat transfer source (H) for temperature deficiencies on the silicone roll surface (R1), aiding constant nozzle(N)-to-web (1) spacing (B) irrespective of temperature variations and line speeds. Provision is also made for the introduction of chilling, if required.