Process and apparatus for embossing a film surface

A process is provided for continuously embossing a pattern onto a surface of a film. The process includes heating a resin material to form a flowable melt; discharging the melt into a first nip (18), wherein the first nip (18) is an area of contact between an embossing roll (20) and a backside roll...

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Bibliographische Detailangaben
1. Verfasser:	COYLE, DENNIS JOSEPH
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A process is provided for continuously embossing a pattern onto a surface of a film. The process includes heating a resin material to form a flowable melt; discharging the melt into a first nip (18), wherein the first nip (18) is an area of contact between an embossing roll (20) and a backside roll (22); pressing the melt against the embossing roll (20) and the backside roll (22); and forming a self-supporting film (29) with a surface having an embossed pattern thereon. The embossed roll (20) is heated to a temperature greater than a glass transition temperature of the resin whereas the backside roll (22) is heated to a temperature less than the glass transition temperature of the resin.