Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
  • C08J5/12—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives
  • C08J5/124—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives using adhesives based on a macromolecular component
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
  • C08J7/04—Coating
  • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
  • C08J7/04—Coating
  • C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
  • C08J7/04—Coating
  • C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C1/00—Photosensitive materials
  • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
  • G03C1/795—Photosensitive materials characterised by the base or auxiliary layers the base being of macromolecular substances
  • G03C1/7954—Polyesters
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
  • C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
  • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S428/00—Stock material or miscellaneous articles
  • Y10S428/90—Magnetic feature
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31786—Of polyester [e.g., alkyd, etc.]

Definitions

• the present invention relates to an easily adhesive polyester film having excellent adhesiveness.
• the present invention relates to an easily adhesive polyester film in which a coating film is formed on one side of a polyester film.
• polyester films have been widely used as base materials for magnetic media such as magnetic tapes and disks, capacitors, and photographs.
• polyester films good adhesion is required.
• good adhesion to the magnetic layer is required.
• a simple polyester film particularly a biaxially stretched polyethylene terephthalate film, has an extremely weak adhesive property, and various studies have been made to improve the adhesive property.
• a film surface is subjected to a corona discharge treatment, an ultraviolet irradiation treatment, and a plasma treatment.
• a corona discharge treatment for example, a film surface is subjected to a corona discharge treatment, an ultraviolet irradiation treatment, and a plasma treatment.
• a film in which a urethane resin, an acrylic resin, or the like is coated is known.
• An object of the present invention is to solve the above-mentioned drawbacks of the prior art, to provide excellent adhesiveness,
• the present invention provides an easily adhered polyester film having improved properties.
• the present invention has the following features to achieve the above object.
• An easy-adhesion layer having a coating layer composed mainly of a copolyester containing an ester-forming aromatic metal sulfonate and a higher fatty acid wax on one side of a polyester base film. Ester film.
• Fig. 1 is for measuring the peeling force between the films X1. It is a perspective to reduce the direction of force application and how to stack the films, the best mode for carrying out the invention.
• the copolyester containing an alkali metal salt as a component of the copolymer component is a copolyester obtained by polycondensation of (A) a dicarboxylic acid or an ester-forming derivative thereof and (B) glycol.
• the polyester is a copolyester in which a dicarboxylic acid as the component (A) or an ester-forming alkali metal salt of an aromatic ester sulfonate is copolymerized as a part of the component thereof.
• a copolyester having the above composition can improve the adhesiveness.
• the aromatic dicarboxylic acid component forming the copolyester in the present invention includes terephthalic acid, isophthalic acid, phthalic acid, 2,5-dimethylterephthalic acid, 1,4-naphthalenedicarboxylic acid, biphenyldicarboxylic acid , 2,6-naphthalenedicarboxylic acid, 1,2-bis (phenoxy) ethane-P, P'-dicarboxylic acid or an ester-forming derivative thereof.
• a lower alkyl ester having 1 to 5 carbon atoms of an acid or an acid halide is generally used.
• ester-forming alkali metal salts of aromatic sulfonic acids examples include sulfoterephthalic acid, 5-sulfoisophthalic acid, 4-sulfophthalic acid, 4-sulfonaphthalene-2,7-dicarbonic acid, sulfoxyxylene glycol, Sulfo-1,4-bis (hydroxyloxy) Potassium metal salts (alkali metal salts of sulfonic acids) and their ester-forming derivatives.
• ester-forming sulfonic acid metal salt compounds it is most preferable to use 5-sodium sulfoisophthalic acid, sodium sulfoterephthalic acid, or an ester-forming derivative thereof.
• the glycol component forming the copolyester in the present invention includes an aliphatic glycol having 2 to 10 carbon atoms, or an alicyclic glycol having 6 to 10 carbon atoms.
• an aliphatic glycol having 2 to 10 carbon atoms or an alicyclic glycol having 6 to 10 carbon atoms.
• As a part of the glycol component at least one of diethylene glycol and triethylene glycol can be used as needed.
• the higher fatty acid wax in the present invention various known waxes can be used.
• the main component is a higher fatty acid having 2 to 35 carbon atoms, preferably higher than 33, and a higher fatty acid having 5 to 35 carbon atoms, preferably 17 to 33 alcohol.
• Alcohol components are generally ⁇ to trivalent alcohols.
• Specific examples of higher fatty acid waxes include waxes such as shellac wax, bran wax, insect wax, wool wax, carnauba wax, montan wax, candelillaro, synthetic wax, and some of the fatty acid esters of these waxes.
• a modified product in which all or all are replaced with another alcohol component or modified to a metal salt such as an alkali metal such as sodium or potassium, or an alkaline earth metal such as calcium, magnesium or barium.
• a metal salt such as an alkali metal such as sodium or potassium, or an alkaline earth metal such as calcium, magnesium or barium.
• Carnauparo and Montan wax are preferred.
• These higher fatty acid resins may be in the form of an aqueous dispersion using an emulsifier or the like, or may be in the form of fine powder.
• the coating film (coating II) in the present invention is formed of a mixture mainly (main component) of the above copolyester and the above higher fatty acid wax. This means that the mixture of the copolyester and the wax contains 90% by weight or more, preferably 95% by weight or more of the coating layer.
• the mixing ratio of the copolyester and wax used in the coating layer is 70 to 99.9% by weight, preferably 85 to 9.9% by weight, and the wax is 3 to 0% by weight. . 1 weight 0/0, preferably enhanced adhesion that is mixed ⁇ 5 ⁇ ⁇ wt%, preferably in terms of improving the Purotsukin grayed properties.
• the mixture of the copolyester and the wax is preferably dissolved or dispersed in a necessary solvent, for example, water or an appropriate organic solvent, and applied to a polyester base film.
• a necessary solvent for example, water or an appropriate organic solvent
• the thickness of the coating layer is not particularly limited,
• the polyester base film in the present invention is a polyester film formed by a known method, that is, a sheet or a cylinder obtained by melting polyester. The film is formed by extruding it into a film and stretching it in at least one direction.
• the mechanical properties of the film are the usual biaxially stretched balance type, and the film is stretched in the biaxial direction and further strengthened in the uniaxial direction. It is desirable to use either a tensioned type that has been extended or a tensioned type that has been extended in two axial directions and has been strengthened in the two-wheel direction.
• the thickness of the base film is not particularly limited since it varies depending on the application, but usually a thickness of 5 to 50 / is used.
• the surface of the polyester base film is smooth.
• the surface roughness of the film is as follows: the cut-off value of the stylus type surface roughness meter is 0.25 mm, and the Ra value is Is desirably in the range of 0.003 to 0, 0 30 ⁇ .
• the Ra value is defined as the center line (the part above the center line) in the roughness curve excluding the waviness using an appropriate cut-off value from the cross-section curve obtained from the stylus type surface roughness meter. And the lower part are determined to be equal.) From is the arithmetic mean of the absolute values of the height and the low of the roughness curve (according to DIN 4768).
• the polyester forming the base film is a self-supporting film mainly composed of linear polyester. Anything that can be performed may be used.
• polyethylene terephthalate, polytetramethylene terephthalate, poly-1,4-cyclohexylene dimethylene terephthalate, polyethylene-2,6-naphthalene dicarboxylate, polyethylene-P-age xybenzoate, etc. Is a typical example.
• the above polyester may be a homopolyester or a copolyester, but a homopolyester is preferred.
• the components to be copolymerized include, for example, diol components such as diethylene glycol, propylene glycol, neopentyl glycol, polyethylene glycol, P-xylylene glycol, 1,4-cyclohexanedimethanol, and adipic acid.
• Dicarboxylic acid components such as sebacic acid, phthalic acid, isophthalic acid and 2, &-naphthalene dicarboxylic acid; polyfunctional dicarboxylic acid components such as trimellitic acid pyromellitic acid; Derivatives, P-saltoxybenzoic acid and the like. It is preferable that the copolymerization stage and the component to be copolymerized be 20 mol% or less.
• a commonly used polyester is a polycondensation product of (A) a dicarboxylic acid or an ester-forming derivative thereof and (B) a glycol, and at least 80 mol% of the (A) component is terephthalic acid. It is an acid or an ester-forming derivative thereof, and is a polyester in which at least 80 mol% of the component (B) is ethylene glycol.
• polyethylene terephthalate is the most readily available.
• a substantially non-oriented, crystalline polyethylene terephthalate raw material is melted at 270 to 290 ° C and extruded in the form of a sheet. After forming the sheet, it is stretched 3,0 to 5,0 times in the longitudinal direction by roll stretching.
• a coating agent mainly composed of a copolyester and a higher fatty acid wax described below is applied to the uniaxially stretched film using a metaling bar coater.
• the amount of coating varies depending on the desired thickness of the coating film and the elongation ratio after the next step, but is, for example, 0.08 gz in 2 .
• Next pass through a stenter and dry at 90 ° C to ⁇ 2 ° C, pre-ripen, stretch 3.0 to 4.0 times, and in some cases further stretch 1.1 to 1.8 times in the longitudinal direction. And then heat treated at ⁇ 8 ⁇ to 230 ° C.
• a biaxially stretched polyethylene terephthalate film having a coating layer formed thereon can be obtained.
• the present invention provides an easily-adhesive polyester film in which a coating layer made of a mixture mainly composed of a specific copolyester and a higher fatty acid wax is formed on one surface of polyester, and the following excellent effects are obtained. can get,
• Parts in the examples are parts by weight.
• the evaluation criteria were determined based on the following.
• the separation force is 270 g Z g2 cnf or less, it can be used without practical problems.
• copolyesters listed in Table 1 were dissolved in ripened water at 85 ° C to make a 3% by weight aqueous solution. This is an aqueous dispersion higher fatty acid Carnaupa wax was mixed as a wax to prepare a coating solution containing 90% by weight of a cholesterol and 10% by weight of a higher fatty acid wax as a solid composition ratio.
• polyethylene terephthalate is melt-extruded on a casting drum at about 20 ° C, then stretched 3.4 times in the machine direction by roll stretching, and then coated with the above-mentioned composition using a metal limber coater.
• the solution was coated on one side of a polyethylene terephthalate film.
• the coated film is passed through a stenter, dried and pre-ripened at 11 ° C, and is laterally stretched at a composition stretching ratio of 3.4 times. Then, the coating film is ripened at a ripening temperature of 85 ° C. Was obtained.
• Table 2 shows the measurement results of the characteristics of the film.
• the obtained easily-adhesive polyester film maintained its adhesiveness even after six months after being stored in the form of a roll and had excellent effects without sticking between the films.
• Example III On one side of the uniaxially stretched polyethylene terephthalate film obtained by the method of Example I, 3% by weight of the copolyester shown in Table III was used, and various higher fatty acid waxes were used, as shown in Table III.
• the changed mixture was coated and stretched 3.4 times in the ⁇ direction by the same method as in Example 1. After that, it was matured in the same manner as in Example 1 to form an easily adhesive polyester film with a coating layer formed.
• Table 1 shows the measurement results of the characteristics of the film. As is clear from the table, the evaluation results correspond to Examples 1 to 8 of the present invention.
• Comparative Examples III to 3 were out of the scope of the present invention, and had some characteristic defects.
• T PA Perphthalic acid Trisulfoisophthalic acid
• the film of the present invention can be applied to various uses such as a magnetic recording medium, a capacitor, and a photographic film.
• a magnetic recording medium such as a urethane resin, a vinyl chloride-vinyl acetate copolymer, or an acrylic resin is used.
• a binder having particularly good adhesion to the polyester film is selected.
• the type of binder to be used must be limited, and when the coated film of the present invention is used, the degree of freedom in selecting the type of binder that can be used is expanded. Further, when the coated film of the present invention is used, the adhesiveness to the magnetic layer is good, and defects such as peeling of the magnetic layer during use as a magnetic recording medium can be prevented.

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• Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Physics & Mathematics (AREA)
• Manufacturing & Machinery (AREA)
• Spectroscopy & Molecular Physics (AREA)
• General Physics & Mathematics (AREA)
• Laminated Bodies (AREA)
• Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
• Polyesters Or Polycarbonates (AREA)

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• 1984
  • 1984-07-09 JP JP59140704A patent/JPS6120741A/ja active Granted
• 1985
  • 1985-07-04 DE DE8585903381T patent/DE3573903D1/de not_active Expired
  • 1985-07-04 WO PCT/JP1985/000379 patent/WO1986000572A1/ja not_active Ceased
  • 1985-07-04 US US06/845,270 patent/US4699845A/en not_active Expired - Lifetime
  • 1985-07-04 EP EP85903381A patent/EP0188620B1/en not_active Expired

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