WO1991004856A1 - A composite polyester film - Google Patents
A composite polyester film Download PDFInfo
- Publication number
- WO1991004856A1 WO1991004856A1 PCT/JP1990/001233 JP9001233W WO9104856A1 WO 1991004856 A1 WO1991004856 A1 WO 1991004856A1 JP 9001233 W JP9001233 W JP 9001233W WO 9104856 A1 WO9104856 A1 WO 9104856A1
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- WO
- WIPO (PCT)
- Prior art keywords
- polyester
- layer
- composite
- compound
- film
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
- B29C48/914—Cooling of flat articles, e.g. using specially adapted supporting means cooling drums
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
- B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
- B29C48/9165—Electrostatic pinning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/739—Magnetic recording media substrates
- G11B5/73923—Organic polymer substrates
- G11B5/73927—Polyester substrates, e.g. polyethylene terephthalate
- G11B5/73931—Two or more layers, at least one layer being polyester
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/105—Metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/12—Mixture of at least two particles made of different materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/08—Dimensions, e.g. volume
- B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
- B32B2309/105—Thickness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
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- 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
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
- Y10T428/2495—Thickness [relative or absolute]
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- 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
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
-
- 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
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/254—Polymeric or resinous material
-
- 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
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/258—Alkali metal or alkaline earth metal or compound thereof
-
- 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 a composite polyester film. More specifically, the present invention relates to a composite polyester film having excellent castability and thermal stability for electrostatic application.
- Polyesters such as polyethylene terephthalate have excellent mechanical properties, heat resistance, weather resistance, and electrical insulation resistance. Therefore, polyesters are widely used as films and other molded articles.
- Polyester films are required to have good film forming productivity, uniform thickness, and excellent transparency.
- polyester film is produced by quenching melt-extruded sheet-like polyester with a rotary cooling drum or the like.
- the sheet-like polyester hardly adheres to the cooling drum surface, it is difficult to obtain a uniform film.
- various methods have been proposed for improving the adhesion of the sheet-like polyester. For example, a method in which an electrode is provided between the extrusion die and the surface of the cooling body, a high voltage is applied to the unsolidified sheet, and the sheet is adhered to the surface of the cooling body (hereinafter referred to as electrostatic application)
- electrostatic application The casting method has been proposed (Japanese Patent Publication No. 37-6142, etc.).
- Japanese Patent Publication No. 37-6142 Japanese Patent Publication No. 37-6142, etc.
- the present inventors have found that the amount of metal present in the vicinity of the surface of a molten polyester sheet in contact with a rotating cooling body is dominant in the electrostatically applied castability of a polyester film, and have conducted intensive studies. As a result, the inventors have reached the present invention that solves the above problems at once.
- An object of the present invention is to provide a multi-layer structure composed of a main layer and a sub-layer that simultaneously satisfy excellent electrostatic application castability and thermal stability. It provides a composite polyester film.
- Another object of the present invention is to provide a composite polyester film having excellent thickness uniformity and transparency, and having a small amount of fish due to the formation of gel-like foreign matter.
- Another object of the present invention is to provide a composite polyester film having a specific amount of inert particles in a polyester constituting a sub-layer, excellent flatness, and moderate lubricity.
- Still another object of the present invention is to provide a porous layer having a large amount of inert particles in a polyester constituting a sub-layer. To provide a composite polyester film with excellent electromagnetic conversion characteristics.
- the object of the present invention is achieved by the following configurations.
- the composite material is characterized in that the specific resistance is lower than the melting specific resistance of the polyester constituting the main layer, and the thickness of the sub-layer is 1Z200 to 4Z10, which is the thickness of the entire composite film. Riesertofinolem.
- polyester constituting the composite film of the present invention examples include poly (ethylene terephthalate), poly (ethylene-2,6-naphthalate), poly (ethylene-1,2-bis) (2—Chlorophenoxy) Ethane 4,4 'dicarboxylate and other homopolymers, copolyesters containing ethylene terephthalate as the main repeating unit, and ethylene 2,6-6-naphthalate as the main repeating unit. Copolyester and the like.
- the copolyester preferably has an amount of the other dicarboxylic acid component and the dalicole component of the copolymer component of 20 mol% or less.
- the copolymer component of this polyester is composed of the following acid component and diol component.
- the acid component examples include aromatic dicarboxylic acids such as isophthalic acid, aliphatic dicarboxylic acids such as adipic acid, and oxycarboxylic acids such as oxybenzoic acid.
- the diol component examples include the power of ethylene glycol, propylene glycol, trimethylene glycol, neopentyl glycol, and 1,4-cyclohexanedimethanol.
- the main layer and the sub-layer constituting the composite polyester film of the present invention may be composed of the same polyester or different polyesters. Further, any polyester may be the main layer.
- the melting specific resistance of the polyester in the present invention is a value measured as follows.
- the measurement is performed using the melting resistivity measuring apparatus shown in FIG.
- the target substance ie, the polyester 5 is placed.
- This container is immersed in the heating element 4.
- Polyester 5 under N 2 gas atmosphere 280.
- Melt with C Melt and store, and apply voltage from DC high voltage generator 1. From the indicated values of ammeter 2 and voltmeter 3 at this time, the electrode area, and the distance between the electrodes, determine the melting specific resistance according to the following equation.o
- V Applied voltage (V)
- the melting specific resistance of the polyester constituting the sublayer of the composite polyester film of the present invention is less than 5 ⁇ 10 8 ⁇ ⁇ cm, preferably 3 ⁇ 10 8 ⁇ ⁇ cm. Less than, particularly preferred: less than 1 ⁇ 10 8 ⁇ ⁇ cm. If the melting specific resistance of the polyester constituting the sub-layer is 5 ⁇ 10 8 ⁇ ⁇ cm or more, the castability of the electrostatic charge decreases, and the film surface has a pellicle (hereinafter referred to as applied unevenness). ) Is likely to occur, and as a result, the productivity of film formation decreases.
- the melting specific resistance of the port re ester constituting the sublayer 1 X 1 0 7 ⁇ ⁇ cm or more if it thermostability good or arbitrary in terms of.
- the melt specific resistance of the polyester constituting the sublayer 0. 5 ⁇ 1 0 8 ⁇ 2. 0 ⁇ ⁇ 0 8 ⁇ ⁇ ⁇ if magnetic recording medium for Besufi Lum, Besufu I Lum especially for deposition or main barrel (Hereinafter, abbreviated as “base film II”).
- base film II 0. I xl 0 8 ⁇ l . O xl 0 8 ⁇ ⁇ cm
- base for a magnetic recording medium or capacitor one staple Lee Lum (hereinafter, abbreviated as Besufi Lum B) and to be suitable.
- the melt resistivity of the polyester constituting the main layer may be higher than that of the polyester constituting the sub-layer, but is preferably 5 ⁇ 10 8 ⁇ cm or more, particularly preferably 1 ⁇ 1 0 9 Omega ⁇ thermal stability of the composite Fi Lum and cm or more is improved, which is preferable less Fi Tsu Shuai.
- the melting specific resistance of the polyester is governed by the type, state and amount of the metal compound added during the production of the polyester. In general, the melting specific resistance tends to be lower as the amount of metal in a molten state that has not been deactivated by a phosphorus compound or the like or as the metal compound does not precipitate as particles in polyester.
- PET polyethylene terephthalate
- an alkali metal compound, an alkaline earth metal compound, a zinc compound, a manganese compound, or the like is used as a reaction catalyst, and the phosphorus compound is further converted when the reaction is substantially completed.
- the metal compound used as the reaction catalyst is partially deactivated by the phosphorus compound.
- the reaction product thus obtained further contains an antimony compound, a titanium compound, and a germanium compound.
- a PET is obtained by a polycondensation reaction in the presence of a polycondensation reaction catalyst such as Usually, PET is manufactured through this process, but the melting resistivity is mainly affected by alkali metal compounds, alkaline earth metal compounds, zinc compounds, manganese compounds, and phosphorus compounds. is there. These metal compounds and phosphorus compounds cause formation of particles insoluble in polyester and decrease in thermal stability.
- polyester 1 0 G g alkaline earth metal compound contained per moles P of zinc compound and the number of moles M, moles A of alkali metal compounds manganese compound, and Li down Compound Is related to the value of the following equation.
- the polyester constituting the sub-layer is preferably
- the metal compound that controls the melting specific resistance of the polyester is a metal added at the stage of producing the polyester.
- Aliphatic carboxylate salts of alkaline earth metal compounds, zinc, manganese and alkali metal compounds, halides and glycol-soluble metal compounds such as alcoholates such as methylate, ethylate, ethylene glycolate, etc. it can.
- a magnesium compound, a manganese compound and an alkali metal compound are preferred because they suppress precipitation of particles and a decrease in thermal stability.
- these metal compounds can be added in a catalytic amount before the transesterification reaction and again after the transesterification reaction.
- the esterification reaction rate is 90% or more, more preferably 95% or more, before the addition.
- the phosphorus compound at least one selected from phosphoric acid, phosphorous acid, and esters thereof is used.
- phosphoric acid monomethyl phosphate, dimethyl phosphate, trimethyl phosphate, triptyl phosphate, phosphorous acid, trimethyl phosphite, trimethyl phosphite, tributyl phosphite And so on 0
- the melt resistivity of the polyester film constituting the sub-layer of the composite polyester film of the present invention must be lower than the melt resistivity of the polyester film constituting the main layer.
- the castability of the electrostatic application is inferior, so that the productivity of the film formation is reduced, or if the productivity of the film formation is improved, uneven application is likely to occur, the thickness becomes nonuniform, and the flatness becomes poor. Inferior and poor transparency.
- the thickness of the polyester constituting the sublayer must be 1Z200 to 4Z10, which is the thickness of the entire composite film. If the thickness of the sub-layer is less than 1Z200, the castability of the applied electrostatic charge is reduced, so that the film-forming productivity is reduced and the applied voltage is uneven, and it is difficult to form a uniform layer. On the other hand, when the thickness of the sub-layer exceeds 4Z10, although the electrostatic castability is improved, the thermal stability is reduced and gel-like foreign matter is easily generated.
- base film A it is preferably 150 to 310, particularly preferably 1 Z20 to 2Z10.
- base film B preferably 1Z200 ⁇ : LZ20, particularly preferably 1Z200 ⁇ 1-50.
- the thickness of the composite film of the present invention is not particularly limited, Preferably it is 0.5 to 100 ⁇ m, especially l to 80 um.
- the sub-layer constituting the composite film of the present invention may be laminated on one side or both sides of the main layer.
- the sub-layer may be single-sided or double-sided, but for capacitors, the sub-layer is preferably single-sided in view of electrical characteristics.
- the composite polyester film of the present invention is preferably used when inert particles are contained in the polyester constituting the sublayer, since the lubricity is improved.
- By adjusting the size and content of the inert particles a composite polyester film suitable for the purpose can be obtained.
- the base film A that is, a composite film suitable for a magnetic recording medium base film, particularly a vapor deposition or metal base film will be described.
- the polyester constituting the sub-layer of the composite polyester preferably contains inert particles having an average particle diameter of 30 m to 2.0 / z, preferably 0.001 to 0.5% by weight. This is preferable because the film surface has good flatness.
- the thickness of the polyester on the sub-layer side is 120 to 4 Z 10, preferably 1/50 to 3 Z 1 of the entire film thickness. 0, more preferably 120 to 210.
- melt specific resistance of the port re ester constituting the sublayer is less than 5 ⁇ ⁇ 0 8 ⁇ ⁇ ⁇ , there at 0. 5 xl 0 8 ⁇ 2. 0 1 0 8 ⁇ ⁇ cm It is even better.
- Melt specific resistance of the structure Surupo Riesuteru the main layer may be higher than for polyester constituting the sublayer, 5 X 1 0 8 ⁇ ⁇ cm or more, if particularly 1 0 X 1 0 8 ⁇ ⁇ cm or more Improved thermal stability, more favorable.
- the average particle size of the inert particles contained in the sub-layer may be 30 m ⁇ ⁇ 2, but may be 50 m; / ⁇ 1.0, especially 50-500 m. It is good. Further, the content of the inert particles is preferably from 0.01 to 0.5% by weight, particularly preferably from 0.01 to 0.2% by weight.
- the composite polyester film since the composite polyester film has excellent castability for applying static electricity, the productivity of film formation is improved, and the uniformity of the film thickness is also excellent. Further, in this case, the composite polyester film can suppress the generation of fishery due to the gel-like foreign matter.
- the base film B that is, a composite poly-ster film suitable for a magnetic recording medium or a capacitor base film will be described.
- the polyester constituting the sublayer of the composite polyester is preferably an inert particle having an average particle diameter of 30 m / z to 1.0 ⁇ , particularly preferably 100 to 600 m. Or 1.0 to 20% by weight, particularly preferably 5 to 15% by weight. In other words, the balance between lubricity and electromagnetic characteristics is good.
- Melt specific resistance of the polyester constituting the sublayer is less than 5 X 1 0 8 ⁇ ⁇ cm , is favored properly is 0. 1 X 1 0 8 ⁇ 1. 0 ⁇ ⁇ 0 8 ⁇ ⁇ ⁇ .
- the melt specific resistance of the port Riesuteru constituting the main layer may be higher than the polyester constituting the sublayer, but the effect is particularly appear in the case of less than 5. 0 X 1 0 9 ⁇ ⁇ cm.
- Polyester containing a low melting specific resistance and containing a high concentration of fine particles as a sub-layer is thinly laminated on the main layer polyester so that a large number of projections having a uniform height can be generated. it can. As a result, a film having improved slipperiness and electromagnetic conversion characteristics can be manufactured with high productivity. Furthermore, the composite film obtained in this way has improved thermal stability, so that the generation of gel-like foreign matter can be suppressed.
- Is an inert particle which can be contained in the composite polyester Fi Lum of the present invention for example, T i 0 2, A 1 2 03> S i 02, Z n O, M g O, C a C 03> C a S 04, Ba SO 4> tetrafluoroethylene, polystyrene and the like, and two or more of them can be used in combination.
- the shape of the inert particles inert particles having a shape closer to a true sphere are preferable in order to maintain the uniformity of the film surface state.
- the polyester constituting the main layer may contain inert particles.
- the content and the average particle diameter of the inert particles are determined by the amount of the polyester constituting the sub-layer. It is preferable not to exceed the range.
- the composite polyester film of the present invention can be produced, for example, by the following method.
- the polyester (a) having a melting specific resistance of less than 5 ⁇ 10 8 ⁇ ⁇ cm and the polyester (b) having a higher melting specific resistance than the polyester (a) are composed of the polyester (a).
- the polyester as the main layer and the polyester as the sub-layer are melt-extruded to obtain a composite unstretched sheet. You. This unstretched sheet is rapidly cooled by a rotary cooling body. An electrostatic casting method is used to increase the adhesion between the polyester sheet and the rotating cooling body. At this time, the method of bringing the polyester on the sub-layer side into contact with the rotary cooling body has a large effect of improving the adhesion. Further, according to this method, the content of metal contained in the polyester on the sublayer side can be suppressed, which is more preferable in terms of electrical properties, flatness of the film surface, and thermal stability of the film.
- FIG. 1 is a schematic view of an apparatus for measuring the melting specific resistance of a polyester.
- Parts in the examples are parts by weight, and the methods for measuring each property are as follows.
- the concentration ratios (M + / C + ) and (P + / C + ) are determined in the depth direction of the film from the polyester layer on the sublayer side. From the determined concentration ratios, the concentrations of the metal element and the phosphorus element at each depth can be known. The measurement depth was measured up to 50% of the entire thickness of the film.
- the difference in concentration ratio (M + C +)-(P + ZC +) measured in this way shows a high value on the surface of the film, but decreases rapidly as it approaches the main layer, and then stabilizes at a constant value. I do.
- the two inflection points were connected by a straight line, and the distance from the value of 1Z2 to the sublayer side surface layer was defined as the lamination thickness.
- the average particle diameter was determined by a particle equivalent sphere diameter corresponding to a 50% by volume point measured by an electron micrograph of the particles.
- the equivalent sphere diameter is the diameter of a sphere that has the same volume as a particle
- a DC voltage of 6 KV was applied between the electrode placed above the melt-extruded film and the rotating cooling body, and the casting speed was gradually increased to increase the casting speed (m / m inin) and according to the following criteria. Grade 2 or higher was accepted.
- the measurement was performed according to JIS-C-2318 using an AC withstand voltage tester.
- Bis- (1-hydroxyxethyl) terephthalate with a molar ratio of ethylene glycol to terephthalic acid of 1.15 and its low polymer melt-stored at 250 ° C in an esterification reactor and its low polymer were terephthalic acid 86.5 Part, ethylene glycol 31.7 parts (molar ratio 1.15) and the slurry obtained by kneading were continuously supplied over a period of 3.5 hours.
- the esterification reaction was performed at ° C, and the generated water was distilled off from the top of the purification tower. After the slurry supply ends, 1.
- the esterification reaction was continued for 5 hours to substantially complete the reaction.
- the conversion was 98.3%.
- Table 1 shows the polymer characteristics of Reference Examples 1 to 6.
- the polymer I obtained in Reference Example 1 was dried at 160 for 3 hours. After 3 0 0. Melted in C (Polymer A). Also, 95 parts of the polymer I of Reference Example 1 and 5 parts of the polymer IV of Reference Example 4 were mixed, dried in the same manner, and then melted by another melt extruder at 300 (PoPo). Remer B).
- Example 1 was repeated except that the thickness ratio of the main layer and the sublayer, the mixed composition of the polymer A forming the main layer, and the mixed composition of the polymer B forming the sublayer were changed as shown in Tables 2 and 3.
- a biaxially stretched film was obtained in exactly the same manner as in 1.
- Table 3 when the thickness ratio of the sub-layer is less than the range of the present invention (Comparative Example 1), not only the castability of the electrostatic application is not good but also the film with uneven lamination. It was Lum. Further, when the value exceeds the range of the present invention (Comparative Example 2), The result was lower breakdown voltage of the film, increased fishiness, and poor thermal stability. Furthermore, when the melting resistance of the polymer B constituting the sub-layer was not less than the value specified in the present invention (Comparative Example 3), the electrostatic castability was not favorable, and a large number of uneven application occurred. .
- Example 1 except that the polymer constituting the main layer was the polymer I of Reference Example 1 and the polymer constituting the sub-layer was the polymer V of Reference Example 5, except that the polymer V of Reference Example 5 was used, Tables 2 and 3 were used. A biaxially stretched film as shown in Table 3 was obtained. The electrostatic castability and the film fisheye were both good. On the other hand, a film obtained by forming only a single layer of the polymer obtained in Reference Example 1 and biaxially stretching to a thickness of 12 ⁇ m was poor in electrostatic castability, and application unevenness occurred frequently. Lum could not be obtained (Comparative Example 4). The film obtained by forming a single layer of only the polymer obtained in Reference Example 5 and biaxially stretching the film to a thickness of 12 ⁇ m had poor thermal stability and caused a lot of fishery (Comparative Example 5).
- the polymer composing the main layer is the polymer I of Reference Example 1
- the polymer composing the ij ij layer is the polymer VI of Reference Example 6 on both sides of the main layer, each having a thickness of 1 Z 100 (total sub-layer thickness ratio ⁇ A biaxially stretched film was obtained in the same manner as in Example 1, except that 1Z50) was performed.
- 2nd class of electrostatic application cast, fish The eye was class 1 and ⁇ was 0.062, indicating good results in both electrostatic application castability and film characteristics.
- the main layer was composed of a polymer obtained by mixing the polymer I obtained in Reference Example 1 and the polymer IV obtained in Reference Example 4 at a ratio of 98: 2 (weight ratio), and the sublayer was formed of the polymer ⁇ obtained in Reference Example 3.
- the biaxially stretched film was formed in the same manner as in Example 1 except that the main layer was laminated on both sides of the main layer, and the sub-layer polymer was laminated so that each film had a thickness of 100. I got The castability of electrostatic application was class 2, the fishery was class 2, and ⁇ was 0.065. Good results were obtained in both the castability and film characteristics. Margin below
- Example 4 0.5 / 10 Grade 1 Grade 0.063 530
- Example 5 ⁇ 0.3 / 10 ⁇ ⁇ 0.060 535
- Example 6 2.13 0.5X 10 8 0.5 / 10 Class 1 0.073 510 Example 7 ⁇ ⁇ 1.46 0.9X 10 8 1/10 0.075 520 Example 8 — 0.22 4.0 10 ° 1 ⁇ 48 0.5 10 ⁇ 1/100 Class 0.061 500 Example 0.07 1.2X10 8 ⁇ 1/150 ⁇ 0.065 510 Comparative Example 1 ⁇ ⁇ ⁇ ⁇ 1/300 Class 4 ⁇ 0.059 530 Comparative Example 2 -0.81 2.0X10 9 2.13 ⁇ 6Z10 Class 1 Class 4 0.0141 400 Comparative Example 3 -0.22 4.0X10 8 1 0.51 1.0X10 9 1/10 Grade 1 Grade 0.060 540 Example 10 -0.81 2.0X10 9 1.46 0.9X10 8 1/100 Grade 1 ⁇ 0.074 500 Comparative Example 4 ⁇ ⁇ 0Z10 Single layer Grade 4 ⁇ 0.055 540 Comparative example 5 1.46 0.9X10 8 ⁇ 1st grade 4th grade 0.141 380
- the composite polyester film of the present invention is a composite of polyesters having different melting specific resistances, the following effects are produced. Despite the small amount of metal as a whole, the melting specific resistance on the surface is low, so the castability for electrostatic application is extremely good.
- the composite polyester film of the present invention has a small amount of metal as a whole and good thermal stability because the sublayer having a low melting specific resistance is thin.
- the composite polyester film of the present invention has a specific amount of inert particles in the sub-layer, it has excellent flatness and appropriate lubricity.
- the composite polyester film of the present invention contains a large amount of inert particles in the sublayer, the inert particles are distributed in a large amount only in the surface layer of the composite film, so that the uniformity of the projection height is excellent. Also, it has excellent slipperiness and excellent electromagnetic conversion characteristics as a film for magnetic recording media.
- the composite polyester film of the present invention can be used in a variety of applications such as magnetic recording media, vapor deposition bases, and metal bases. When used as a capacitor, it has excellent dielectric breakdown voltage. It is particularly useful for thin film capacitors.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Laminated Bodies (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP90913885A EP0447555B1 (en) | 1989-09-27 | 1990-09-25 | A composite polyester film |
KR1019910700527A KR0147690B1 (ko) | 1989-09-27 | 1990-09-25 | 복합 폴리에스테르필름 |
DE69032002T DE69032002T2 (de) | 1989-09-27 | 1990-09-25 | Polyesterverbundfilm |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25602989 | 1989-09-27 | ||
JP1/256029 | 1989-09-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991004856A1 true WO1991004856A1 (en) | 1991-04-18 |
Family
ID=17286929
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1990/001233 WO1991004856A1 (en) | 1989-09-27 | 1990-09-25 | A composite polyester film |
Country Status (5)
Country | Link |
---|---|
US (1) | US5256471A (ja) |
EP (1) | EP0447555B1 (ja) |
KR (1) | KR0147690B1 (ja) |
DE (1) | DE69032002T2 (ja) |
WO (1) | WO1991004856A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020193342A (ja) * | 2016-06-24 | 2020-12-03 | 王子ホールディングス株式会社 | 二軸延伸ポリプロピレンフィルム、金属化フィルム、及び、コンデンサ |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997021536A1 (en) * | 1995-12-08 | 1997-06-19 | Minnesota Mining And Manufacturing Company | Sheet material incorporating particulate matter |
US6013222A (en) * | 1995-12-08 | 2000-01-11 | 3M Innovative Properties Company | Method of producing sheet material incorporating particulate matter |
JP2003191414A (ja) * | 2001-12-27 | 2003-07-08 | Toray Ind Inc | 二軸配向積層ポリエステルフィルム |
US7682694B1 (en) * | 2005-02-04 | 2010-03-23 | Block Textiles, Inc. | Product and method for impact deflecting materials |
EP2164079B1 (en) * | 2007-06-04 | 2014-06-18 | Teijin Dupont Films Japan Limited | Biaxially oriented film for electrical insulation |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6015133A (ja) * | 1983-07-07 | 1985-01-25 | Nippon Ester Co Ltd | ポリエステルフイルムの製造方法 |
JPS62204926A (ja) * | 1986-03-06 | 1987-09-09 | Toray Ind Inc | ポリエステル延伸フイルムの製造方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE795478A (fr) * | 1972-02-16 | 1973-08-16 | Cellophane Sa | Films composites en polyesters et leur procede de fabrication |
US4198458A (en) * | 1973-05-11 | 1980-04-15 | Teijin Limited | Laminate polyester films |
US4111625A (en) * | 1974-08-07 | 1978-09-05 | Imperial Chemical Industries Limited | Polymeric film production |
JPS5941176B2 (ja) * | 1979-04-23 | 1984-10-05 | 富士写真フイルム株式会社 | 写真用支持体 |
JPS58183220A (ja) * | 1982-04-21 | 1983-10-26 | Teijin Ltd | 溶融重合体シ−トの冷却装置 |
US5106681A (en) * | 1987-02-12 | 1992-04-21 | Diafoil Company, Limited | Polyester films, magnetic recording media and film capacitors produced therefrom |
JPH0615133A (ja) * | 1991-02-01 | 1994-01-25 | Sankyo Yunibaasu Kk | 吸着剤カートリッジ及び気体浄化装置 |
-
1990
- 1990-09-25 US US07/689,847 patent/US5256471A/en not_active Expired - Lifetime
- 1990-09-25 EP EP90913885A patent/EP0447555B1/en not_active Expired - Lifetime
- 1990-09-25 DE DE69032002T patent/DE69032002T2/de not_active Expired - Lifetime
- 1990-09-25 KR KR1019910700527A patent/KR0147690B1/ko not_active IP Right Cessation
- 1990-09-25 WO PCT/JP1990/001233 patent/WO1991004856A1/ja active IP Right Grant
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6015133A (ja) * | 1983-07-07 | 1985-01-25 | Nippon Ester Co Ltd | ポリエステルフイルムの製造方法 |
JPS62204926A (ja) * | 1986-03-06 | 1987-09-09 | Toray Ind Inc | ポリエステル延伸フイルムの製造方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020193342A (ja) * | 2016-06-24 | 2020-12-03 | 王子ホールディングス株式会社 | 二軸延伸ポリプロピレンフィルム、金属化フィルム、及び、コンデンサ |
JP2021167419A (ja) * | 2016-06-24 | 2021-10-21 | 王子ホールディングス株式会社 | 二軸延伸ポリプロピレンフィルム、金属化フィルム、及び、コンデンサ |
Also Published As
Publication number | Publication date |
---|---|
DE69032002D1 (de) | 1998-03-05 |
EP0447555B1 (en) | 1998-01-28 |
KR920700918A (ko) | 1992-08-10 |
EP0447555A4 (en) | 1993-02-17 |
DE69032002T2 (de) | 1998-07-23 |
KR0147690B1 (ko) | 1998-08-01 |
US5256471A (en) | 1993-10-26 |
EP0447555A1 (en) | 1991-09-25 |
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