EP0187458A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Polymeric films
Assignee: Syngenta Ltd
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Filing: 1985-11-20
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Granted: —
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Expires: 2005-11-20
Abstract
Abstract A metallised film comprises a metallised layer [2] bonded to a thermoplastics polymeric substrate [1], by an adherent layer [4] comprising a sulphonated polyester resin and a triboelectric charge control agent. Fluorinated surfactants are particularly suitable charge control agents, and a polyester, such as biaxially orientated polyethylene terephthalate, is a preferred substrate. The films exhibit improved bonding of the metallised layer to the substrate, which bonding may be further enhanced by the inclusion of fine particulate filler in the adherent layer, and are of utility in diverse applications including decorative drapes, magnetic recording media and the packaging of liquids.
Inventors
- 👤 Christopher Crocker
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 12:04
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; C; C08; C08J; C08J7/00; C08J7/04; B32B15/09; B32B27/00; B32B27/36; B32B7/00; B32B7/04; B32B7/12; C08J7/0427; C08J7/043; C08J7/046; C08J7/052; C09; C09J; C09J167/00; B32B38/00; B32B38/0012; B32B2038/0028; B32B2255/00; B32B2255/20; B32B2255/205; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/518; C08J2467/00; C08L; C08L2666/00; C08L2666/28; C08L2666/34; H; H05; H05K; H05K3/00; H05K3/38; H05K3/386; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/2848; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31786; Y10T428/31794
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
60 words
A metallised film comprising a substrate layer of a thermoplastics polymeric material having on at least one surface thereof an adherent layer and a metallic layer on the surface of the at least one adherent layer remote from the substate, wherein the adherent layer comprises (a) a polyester resin containing free sulphonate groups, and (b) a triboelectric charge control agent.
Claim 2
Dependent Claim
60 words
A metallised film comprising a substrate layer of a thermoplastics polymeric material having on at least one surface thereof an adherent layer and a metallic layer on the surface of the at least one adherent layer remote from the substate, wherein the adherent layer comprises (a) a polyester resin containing free sulphonate groups, and (b) a triboelectric charge control agent.
Claim 3
Dependent Claim
42 words
A metallised film as claimed in claim 1 in which the adherent polyester resin is a reaction product of a mixture comprising at least one sulphonated polycarboxylic acid, or an anhydride or lower alkyl ester thereof with at least one polyhydric alcohol.
Claim 4
Dependent Claim
54 words
A metallised film as claimed in claim 2 in which the reaction mixture also includes at least one unsulphonated polycarboxylic acid, or an anhydride or lower alkyl ester thereof, such that the sulphonated polycarboxylic acid comprises from 5 to 25 mole % of the total content of polycarboxylic acids in the adherent polyester resin.
Claim 5
Dependent Claim
24 words
A metallised film as claimed in claim 3 in which the adherent polyester resin comprises isophthalic acid, diethylene glycol and sulphoisophthalic or sulphoterephthalic acid.
Claim 6
Dependent Claim
24 words
A metallised film as claimed in zny one of the preceding claims in which the adherent polyester resin has been at least partially cross-linked.
Claim 7
Dependent Claim
36 words
A metallised film as claimed in any one of the preceding claims in which the triboelectric charge control agent is of the kind which is capable of acquiring a negative charge on contact with a metal.
Claim 8
Dependent Claim
25 words
A metallised film as claimed in claim 6 in which the triboelectric charge control agent is an anionic or nonionic fluorosurfactant or a mixture thereof.
Claim 9
Dependent Claim
36 words
A metallised film as claimed in claim 7 in which the amount of charge control agent in the adherent layer is in the range of from 0.1 to 10X by weight of the sulphonated polyester resin.
Claim 10
Dependent Claim
40 words
A metallised film as claimed in any one of the preceding claims in which in addition to any triboelectric charge control agent having surfactant properties, the adherent layer contains at least one further surfactant which is anionic, non-ionic or amphoteric.
Claim 11
Dependent Claim
45 words
A metallised film as claimed in any one of the preceding claims wherein the adherent resin layer contains a particulate filler having a particle size less than 0.5 microns, and being present in an amount of up to 50% by weight of the adherent resin.
Claim 12
Independent Claim
66 words
A method of producing a metallised film by forming a substrate layer of a thermoplastics polymeric material, applying to at least one surface therof an adherent layer, and depositing a metallic layer on the surface of the at least one adherent layer remote from the substrate, wherein the adherent layer comprises (a) a polyester resin containing free sulphonate groups, and (b) a triboelectric charge control agent.
Claim 13
Independent Claim
66 words
A method of producing a metallised film by forming a substrate layer of a thermoplastics polymeric material, applying to at least one surface therof an adherent layer, and depositing a metallic layer on the surface of the at least one adherent layer remote from the substrate, wherein the adherent layer comprises (a) a polyester resin containing free sulphonate groups, and (b) a triboelectric charge control agent.
Claim 14
Dependent Claim
51 words
A method as claimed in claim 11 in which the substrate is a polyethylene terephthalate film which is biaxially oriented by sequential stretching in two mutually perpendicular directions, the adherent polyester resin coating medium being applied to the film substrate between the two stages (longitudinal and transverse) of the biaxial stretching.
References Cited (Backward Citations)
US4476189A
Cited
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