Patent EP0188620A1 successfully refreshed from Google Patents.
EP0188620A1
Expired / Lapsed
EP
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Easily bondable polyester film
Assignee: Toray Industries Inc
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Filing: 1985-07-04
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Granted: —
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Expires: 2005-07-04
Abstract
Abstract An easily bondable polyester film comprising a polyester base film having on one side a coating layer of a mixture mainly composed of a copolyester containing ester-forming alkali metal aromatic sulfonate as one comonomer and a higher fatty acid wax. This film has excellent bondability and impoved blocking properties, and is useful as base film for a magnetic recording medium, capacitor, photographic film, etc.
Inventors
- 👤 Tatuo Oikawa
- 👤 Takao Izasa
- 👤 Kazuo 740-12 Aza-Wakamiya Okabe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 21:02
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/12; C08J5/124; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; G; G03; G03C; G03C1/00; G03C1/76; G03C1/795; G03C1/7954; C08J2367/00; C08J2367/02; C08J2423/00; C08J2423/02; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
54 words
An easily-adhesive polyester film comprising a polyester base film and a coating layer formed on one surface of the polyester base film, the coating layer comprising a mixture composed mainly of a copolyester comprising as one comonomer component an alkali metal salt of an ester-forming aromatic sulfonic acid and a higher fatty acid wax.
Claim 2
Dependent Claim
54 words
An easily-adhesive polyester film comprising a polyester base film and a coating layer formed on one surface of the polyester base film, the coating layer comprising a mixture composed mainly of a copolyester comprising as one comonomer component an alkali metal salt of an ester-forming aromatic sulfonic acid and a higher fatty acid wax.
Claim 3
Dependent Claim
22 words
An easily-adhesive polyester film as set forth in claim 1, wherein the polyester constituting the base film is a thermoplastic linear polyester.
Claim 4
Dependent Claim
65 words
An easily-adhesive polyester film as set forth in claim 1, wherein the polyester constituting the base film is a polycondensation product of (A) a dicarboxylic acid or an ester-forming derivative thereof with (B) a glycol, in which at least 80 mole% of the component (A) is terephthalic acid or an ester-forming derivative thereof and at least 80 mole% of the component (B) is ethylene glycol.
Claim 5
Dependent Claim
20 words
An easily-adhesive polyester film as set forth in claim 1, wherein the polyester constituting the base film is polyethylene terephthalate.
Claim 6
Dependent Claim
85 words
An easily-adhesive polyester film as set forth in claim 1, wherein the copolyester is a polycondensation product of (A) a dicarboxylic acid or an ester-forming derivative thereof with (B) a glycol, in which 7 to 40 mole% of the component (A) is an alkali metal salt of an ester-forming aromatic sulfonic acid and at least 40 mole% of the component (B) is at least one glycol selected from aliphatic glycols having 2 to 10 carbon atoms and alicyclic glycols having 6 to 10 carbon atoms.
Claim 7
Dependent Claim
36 words
An easily-adhesive polyester film as set forth in claim 5, wherein the alkali metal salt of the ester-forming aromatic sulfonic acid is at least one member selected from 5-sodium sulfoisophthalate, sodium sulfoterephthalate and ester-forming derivatives thereof.
Claim 8
Dependent Claim
64 words
An easily-adhesive polyester film as set forth in claim 5, wherein at least 40 mole% of the component (B) is at least one glycol selected from aliphatic glycols having 2 to 10 carbon atoms and alicyclic glycols having 6 to 10 carbon atoms and 1 to 60 mole% of the component (B) is at least one member selected from diethylene glycol and triethylene glycol.
Claim 9
Dependent Claim
32 words
An easily-adhesive polyester film as set forth in claim 7, wherein at least one glycol selected from diethylene glycol and triethylene glycol occupies 1 to 18 mole% of the total component (B).
Claim 10
Dependent Claim
44 words
An easily-adhesive polyester film as set forth in claim I, wherein the mixture composed mainly of the copolyester and the higher fatty acid wax comprises 70 to 99.9% by weight of the copolyester and 0.1 to 30% by weight of the higher fatty acid.
Claim 11
Dependent Claim
45 words
An easily-adhesive polyester film as set forth in claim 1, wherein the mixture composed mainly of the copolyester and the higher fatty acid wax comprises 85 to 99% by weight of the copolyester and 1 to 15% by weight of the higher fatty acid wax.
Claim 12
Dependent Claim
48 words
An easily-adhesive polyester film as set forth in claim 1, wherein the higher fatty acid wax is a wax composed mainly of a fatty acid ester compound formed from a higher fatty acid having 12 to 35 carbon atoms and an alcohol having 15 to 35 carbon atoms.
Claim 13
Dependent Claim
23 words
An easily-adhesive polyester film as set forth in claim 11, wherein the alcohol is an alcohol having a valency of 1 to 3.
Claim 14
Dependent Claim
38 words
An easily-adhesive polyester film as set forth in claim 1, wherein the higher fatty acid wax is at least one member selected from shellac wax, bran wax, insect wax, wool wax, carnauba wax, montan wax and candelilla wax.
Claim 15
Dependent Claim
28 words
An easily-adhesive polyester film as set forth in claim 1, wherein the higher fatty acid wax is at least one member selected from carnauba wax and montan wax.
References Cited (Backward Citations)
No citation records indexed.
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