Manufacturing a release liner

A release liner is produced by providing a web of film 11; subjecting at least a first surface of the film web to a first plasma discharge treatment 14 in the presence of a gas (introduced at 13) which effectively functionalises the first surface of the film web to provide thereon functional groups...

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Bibliographische Detailangaben
1. Verfasser:	Simon James Read
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ADHESIVES APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS COMPOSITIONS BASED THEREON DYES GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PERFORMING OPERATIONS POLISHES PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SPRAYING OR ATOMISING IN GENERAL TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING USE OF MATERIALS AS ADHESIVES
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Beschreibung
Zusammenfassung:	A release liner is produced by providing a web of film 11; subjecting at least a first surface of the film web to a first plasma discharge treatment 14 in the presence of a gas (introduced at 13) which effectively functionalises the first surface of the film web to provide thereon functional groups which are capable of actively binding to a release compound and/or a precursor thereof; and subsequently depositing a coating of a release compound (introduced at16) onto the functionalised (with ketone, aldehyde, glyoxyl, amide, amine, hydroxide, nitride or vinyl groups) first surface of the film web by contacting the release compound and/or a precursor thereof with the functionalised first surface during a second plasma discharge treatment 17. The exemplified film 11 comprises a coextruded bubble film having a polypropylene core ethylene propylene copolymer skins. It is subjected to dielectric barrier discharge plasma treatments with ammonia in nitrogen and then with hexamethyl disiloxane in nitrogen, to produce a 50nm thick polydimethylsiloxane release coating. The release liners can be used with pressure sensitive adhesive labels and packaging films.