WO2012114988A1 - 二軸配向ポリエチレンテレフタレートフィルム - Google Patents
二軸配向ポリエチレンテレフタレートフィルム Download PDFInfo
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- WO2012114988A1 WO2012114988A1 PCT/JP2012/053763 JP2012053763W WO2012114988A1 WO 2012114988 A1 WO2012114988 A1 WO 2012114988A1 JP 2012053763 W JP2012053763 W JP 2012053763W WO 2012114988 A1 WO2012114988 A1 WO 2012114988A1
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- WIPO (PCT)
- Prior art keywords
- film
- polyethylene terephthalate
- biaxially oriented
- oriented polyethylene
- terephthalate film
- Prior art date
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
-
- 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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
- B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
- B29C55/14—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial successively
- B29C55/143—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial successively firstly parallel to the direction of feed and then transversely thereto
-
- 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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
- B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
-
- 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
- C08J5/18—Manufacture of films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
- B29K2067/003—PET, i.e. poylethylene terephthalate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
- B29K2995/0031—Refractive
- B29K2995/0032—Birefringent
-
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/0393—Flexible materials
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/01—Dielectrics
- H05K2201/0137—Materials
- H05K2201/0145—Polyester, e.g. polyethylene terephthalate [PET], polyethylene naphthalate [PEN]
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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
Definitions
- the present invention relates to a biaxially oriented polyethylene terephthalate film excellent in thermal dimensional stability.
- the biaxially oriented polyethylene terephthalate film of the present invention can be suitably used for a substrate film for flexible devices.
- the biaxially oriented polyethylene terephthalate film of the present invention is a base film for organic EL displays (EL is an abbreviation for electroluminescence), electronic paper, organic EL lighting, organic solar cells, and dye-sensitized solar cells.
- EL organic EL displays
- the dimensional change in various processes is small (thermal dimensional stability is good), the curl is small, and the processability is excellent.
- Biaxially oriented polyethylene terephthalate film utilizes its excellent thermal properties, dimensional stability, mechanical properties, electrical properties, heat resistance, and surface properties to provide magnetic recording materials, packaging materials, electrical insulating materials, various photographic materials, graphics It is widely used as a base material for many applications such as art materials and optical display materials. However, it is thought that further improvement in physical properties is necessary for the base film for flexible devices, and in the past, methods such as blending polyethylene terephthalate with other thermoplastic resins have been studied in order to improve the properties of polyethylene terephthalate film. Has been. (Refer patent document 1) Moreover, the method of adding particle
- Patent Document 2 In addition, a method of relaxing and annealing to reduce the thermal shrinkage rate is disclosed. In order to improve dimensional stability, for example, it has been proposed to increase the proportion of rigid amorphous chains in the film structure. (See Patent Document 4 and Patent Document 5)
- Patent Document 1 even if a thermoplastic resin is blended, polyethylene terephthalate is difficult to be oriented and low thermal expansion (this indicates thermal dimensional stability) cannot be sufficiently improved. There is. Moreover, regarding the technique described in Patent Document 2, there is a problem that when particles are added at a high concentration, stretchability is deteriorated, and low thermal expansion is not sufficiently improved. In addition, the technique described in Patent Document 3 is intended to reduce the thermal shrinkage rate, and low thermal expansion due to high orientation cannot be obtained. In addition, regarding the techniques of Patent Documents 4 and 5, as specific means (manufacturing method), a step of cooling stepwise after biaxial stretching and a step of performing pressure treatment after film formation are described. In both cases, the rigid amorphous chains are increased and stabilized by thermal crystallization or aging treatment, so that they are not highly oriented and low thermal expansion cannot be obtained. As described above, it has been difficult to achieve both low thermal expansion and low thermal shrinkage.
- an object of the present invention is to solve the above-mentioned problems and to obtain a biaxially oriented polyethylene terephthalate film excellent in thermal dimensional stability, and particularly in various processes when used as a base film for flexible devices.
- An object of the present invention is to provide a biaxially oriented polyethylene terephthalate film that can reduce the dimensional change, has small curl, and has excellent processability.
- the present invention is intended to achieve the above object and has the following characteristics.
- the biaxially oriented polyethylene terephthalate film of the present invention is a biaxially oriented film using at least a polyethylene terephthalate resin, and has a refractive index nMD in the film longitudinal direction (sometimes referred to as MD) and a film width direction (referred to as TD).
- the average refractive index nTD ((nMD + nTD) / 2) is 1.655 to 1.70
- the refractive index nZD in the film thickness direction (sometimes referred to as ZD) is 1.490 to 1.70. 520.
- the biaxially oriented polyethylene terephthalate film of the present invention is a biaxially oriented polyethylene terephthalate film in which the refractive index relationship in each direction is represented by the following formula.
- the thermal shrinkage at a temperature of 150 ° C. in the longitudinal direction and the width direction is 0 to 0.5%.
- the thermal expansion coefficient at a temperature of 50 to 150 ° C. is 0 to 25 ppm / ° C. in both the longitudinal direction and the width direction.
- the minute melting peak (T-meta) is 180 to 200 ° C.
- (Fn) / crystallinity ( ⁇ c) is 0.45 to 0.65.
- the crystallinity ( ⁇ c) is 0.25 to 0.35.
- the film haze is 0 to 5%. Furthermore, it is a film for a flexible device substrate using the biaxially oriented polyethylene terephthalate film described above.
- a biaxially oriented polyethylene terephthalate film having excellent thermal dimensional stability can be obtained.
- dimensional changes in various processes can be reduced, and a biaxially oriented polyethylene terephthalate film having small curl and excellent processability can be obtained.
- the biaxially oriented polyethylene terephthalate film of the present invention is a crystalline polyester, such as polyethylene terephthalate (hereinafter referred to as “polyester terephthalate”), particularly from the viewpoint of imparting excellent productivity, mechanical properties, thermal dimensional stability, electrical properties, surface properties and heat resistance. (It may be called PET.) Needs to be the main component.
- a main component means 80 mass% or more in a film composition.
- the biaxially oriented PET film of the present invention needs to have an average ((nMD + nTD) / 2) of the refractive index nMD in the film longitudinal direction and the refractive index nTD in the width direction of 1.655 to 1.70.
- the refractive index is used as a parameter indicating the molecular orientation in the PET film. The higher the refractive index, the more the molecules are oriented in that direction.
- the average of the refractive index nMD in the film longitudinal direction and the refractive index nTD in the width direction can be controlled by the film forming conditions, but in particular, the draw ratio, the heat treatment step and the relaxation annealing treatment step (relaxation).
- the condition of the annealing process during the process is greatly affected.
- ((nMD + nTD) / 2) increases by increasing the draw ratio, decreasing the temperature of the heat treatment step, and decreasing the relaxation rate of relaxation annealing.
- ((NMD + nTD) / 2) is more preferably 1.657 to 1.680, and still more preferably 1.661 to 1.665.
- the biaxially oriented PET film of the present invention needs to have a refractive index nZD in the film thickness direction of 1.490 to 1.520.
- nZD refractive index
- the refractive index is less than 1.490, the molecular chain distortion of the PET film is large, the thermal contraction rate is large, and the thermal dimensional stability and curling properties are deteriorated.
- the average refractive index is greater than 1.520, orientational relaxation occurs, the thermal expansion coefficient increases, and thermal dimensional stability and curl properties deteriorate.
- nZD can be controlled by the film forming conditions, the conditions of the heat treatment process and the relaxation annealing process are particularly affected. In order to increase nZD, there is a method of increasing the heat treatment temperature.
- nZD is affected by the relaxation annealing temperature and the relaxation rate. As the relaxation annealing temperature increases, nZD increases. Further, when the relaxation rate is increased, nZD increases. nZD is more preferably 1.495 to 1.515, and still more preferably 1.498 to 1.505.
- the biaxially oriented PET film of the present invention preferably satisfies the following formula.
- Formula 1 nZD ⁇ ⁇ 0.8 ⁇ ((nMD + nTD) / 2) +2.826.
- nMD which is the refractive index in the thickness direction
- nTD the refractive indexes in the plane direction
- the amount of nZD increases, the plane orientation is lowered, and the thermal dimensional stability is deteriorated.
- a heat treatment / relaxation annealing treatment as described below is performed to find a process for increasing nZD without reducing the plane orientation, thereby producing a film that achieves both thermal dimensional stability and curlability. It became possible to get.
- the thermal dimensional stability indicates the difficulty of dimensional deformation due to heat in the manufacturing process of a flexible device, and the smaller the deformation, the better.
- the thermal expansion coefficient of the biaxially oriented PET film When the thermal expansion coefficient of the biaxially oriented PET film is too large, the difference in thermal expansion from the flexible device layer formed on the film becomes large, which is not preferable because it causes cracks and pinholes in the flexible device layer. Moreover, even if the heat shrinkage rate is too large, the flexible device layer cannot be accurately formed on the film, and the function of the flexible device layer is lowered, which is not preferable.
- the curling property indicates that the film warps or greatly swells due to heat in the manufacturing process of the flexible device, and the warp and swell are reduced as the thermal expansion coefficient and heat yield are smaller. If the thermal expansion or thermal contraction is large, a large deformation is likely to occur locally, so that the curling property is deteriorated.
- the biaxially oriented PET film of the present invention preferably has a thermal shrinkage of 0 to 0.5% at a temperature of 150 ° C. in both the longitudinal direction and the width direction. If the heat shrinkage rate is less than 0%, it indicates that the film expands instead of shrinking, the film dimensions change greatly due to heat in various processes, yield deteriorates, and problems such as curling and peeling from the device layer occur. Is likely to occur. On the other hand, if the heat shrinkage rate is greater than 0.5%, the film dimensions are greatly changed by heat in various processes, yield is deteriorated, and problems such as curling and peeling from the device layer are likely to occur. The thermal shrinkage at a temperature of 150 ° C.
- the thermal shrinkage rate can be controlled by the film forming conditions, but can be controlled particularly by the heat treatment conditions and annealing conditions. In the present invention, the heat shrinkage rate can be reduced to 0 to 0.5% by devising the manufacturing method and suppressing the orientation relaxation due to annealing. In addition, the thermal shrinkage increases as the molecular chain strain increases, and has a large correlation with nZD.
- the biaxially oriented PET film of the present invention preferably has a thermal expansion coefficient of 0 to 25 ppm / ° C. at a temperature of 50 to 150 ° C. in both the longitudinal direction and the width direction.
- a thermal expansion coefficient of 0 to 25 ppm / ° C. at a temperature of 50 to 150 ° C. in both the longitudinal direction and the width direction.
- stretching tears occur frequently during film formation, and productivity is lowered.
- the obtained biaxially oriented film has a very low elongation at break, it is easy to break, handling properties are lowered, and workability is lowered.
- the thermal expansion coefficient at a temperature of 50 to 150 ° C. in both the longitudinal direction and the width direction is more preferably 0 to 22 ppm / ° C., further preferably 0 to 20 ppm / ° C.
- the thermal expansion coefficient can be controlled by the film forming conditions, but can be controlled particularly by the heat treatment conditions and annealing conditions. In the present invention, the thermal expansion coefficient can be reduced to 0 to 25 ppm / ° C. by devising the production method and suppressing the orientation relaxation due to annealing. Further, the coefficient of thermal expansion decreases when the molecular orientation in the plane direction is strong, and has a large correlation with (nMD + nTD) / 2.
- the biaxially oriented PET film of the present invention preferably has a fine melting peak (T-meta) just below the melting point of 180 to 200 ° C.
- T-meta fine melting peak
- T-meta is less than 180 ° C.
- the structural fixation by heat treatment is insufficient and the thermal shrinkage tends to deteriorate.
- T-meta is higher than 200 ° C.
- orientational relaxation will occur extremely and the thermal expansion coefficient tends to deteriorate.
- T-meta is more preferably 180 to 195 ° C, and further preferably 185 to 195 ° C.
- T-meta can be controlled by the heat setting temperature. T-meta varies depending on the film forming machine and the film forming speed, but becomes higher as the heat setting temperature is higher.
- the biaxially oriented PET film of the present invention crystallizes the plane orientation coefficient (fn) obtained from the refractive index (nMD) in the film longitudinal direction, the refractive index (nTD) in the width direction, and the refractive index (nZD) in the film thickness direction.
- the value (fn / ⁇ c) divided by the degree ( ⁇ c) is preferably 0.45 to 0.65.
- the thermal expansion coefficient of the PET film correlates with fn, but fn depends on ⁇ c because it indicates the orientation of the combined crystalline and amorphous regions. Therefore, as ⁇ c increases, fn shows an apparently large value, and it is difficult to uniquely define the thermal expansion coefficient with the plane orientation coefficient.
- the thermal expansion coefficient of the polyester film is an orientation parameter that does not depend on the crystallinity.
- the value of fn / ⁇ c is correlated with the amount of rigid amorphous, and the amount of rigid amorphous increases as fn / ⁇ c increases.
- the rigid amorphous is an amorphous that does not move even in a temperature range higher than the glass transition temperature.
- fn / ⁇ c is less than 0.45, the rigid amorphous amount of the PET film is small, the thermal expansion coefficient is increased, and the thermal dimensional stability and curling properties may be deteriorated.
- fn / ⁇ c is more preferably 0.50 to 0.65, and further preferably 0.55 to 0.65.
- the draw ratio is preferably 3.5 to 5.5 times for both longitudinal stretching and lateral stretching
- the heat setting temperature after stretching using a stenter (hereinafter sometimes abbreviated as “Ths”) is preferably 180 to 195 ° C.
- the relaxation rate in the relaxation annealing step is preferably 0.1 to 1%.
- the biaxially oriented PET film of the present invention preferably has a crystallinity ( ⁇ c) of 0.25 to 0.35.
- the degree of crystallinity is used as a parameter indicating the crystallinity of the PET film. The higher the degree of crystallinity, the higher the crystal component in the film.
- the crystallinity ( ⁇ c) is less than 0.25, heat fixation may not be sufficient, heat shrinkage may increase, and thermal dimensional stability and curl properties may deteriorate. If it is larger than 0.35, the crystal is growing, so that the orientation in the in-plane direction is lowered, and sufficient low thermal expansion may not be achieved.
- the degree of crystallinity () c) is more preferably 0.25 to 0.32, and still more preferably 0.27 to 0.30. In order to bring the degree of crystallinity () c) within the above range, the heat setting temperature (Ths) and the relaxation annealing temperature are particularly affected even in the film forming conditions described later. For example, increasing the heat setting temperature (Ths) increases the crystallinity ( ⁇ c).
- the heat setting temperature (Ths) is preferably 180 to 200 ° C.
- the temperature of the relaxation annealing process is preferably (Ths-5) to (Ths-15) ° C.
- the biaxially oriented PET film of the present invention preferably has a haze value of 0 to 5%. When the haze value is larger than 5%, the transparency is low, and the problem of a decrease in the efficiency of the organic EL or thin film solar cell tends to occur.
- the haze value is more preferably 0 to 3%, still more preferably 0 to 2%.
- the haze value can be controlled by the additive concentration of the additive particles and the average dispersion diameter.
- the biaxially oriented PET film of the present invention as described above is manufactured, for example, as follows.
- PET is manufactured by one of the following processes. That is, (1) A process of obtaining terephthalic acid and ethylene glycol as raw materials, obtaining a low molecular weight PET or oligomer by direct esterification, and then obtaining a polymer by polycondensation reaction using antimony trioxide or a titanium compound as a catalyst. And (2) A process in which dimethyl terephthalate and ethylene glycol are used as raw materials, a low molecular weight product is obtained by transesterification, and a polymer is obtained by subsequent polycondensation reaction using antimony trioxide or a titanium compound as a catalyst.
- the reaction proceeds even without a catalyst, but the transesterification usually proceeds using a compound such as manganese, calcium, magnesium, zinc, lithium and titanium as a catalyst.
- a phosphorus compound may be added for the purpose of inactivating the catalyst used in the reaction.
- inorganic particles and organic particles such as clay, mica, titanium oxide, calcium carbonate, carion, talc, wet silica, dry silica , Colloidal silica, calcium phosphate, barium sulfate, inorganic particles such as alumina and zirconia, organic particles containing acrylic acid, styrene resin, thermosetting resin, silicone and imide compound as constituents, and added during PET polymerization reaction It is also a preferred embodiment to add particles (so-called internal particles) that are precipitated by a catalyst or the like.
- the inert particles are contained in the PET which is a constituent component of the biaxially oriented PET film of the present invention
- the inert particles are dispersed in the form of slurry in a predetermined ratio in ethylene glycol, and this ethylene glycol is added during polymerization.
- the method is preferred.
- inert particles for example, water sol or alcohol sol particles obtained at the time of synthesis of the inert particles are added without drying once, the dispersibility of the particles is good. It is also effective to mix an aqueous slurry of inert particles directly with PET pellets and knead them into PET using a vented biaxial kneading extruder.
- a master pellet of a high concentration of inert particles is prepared by the above method, and this is diluted with PET that does not substantially contain inert particles during film formation.
- a method for adjusting the content of the active particles is effective.
- the obtained pellets and the raw material PET chip are dried under reduced pressure for 3 hours or more at a temperature of 180 ° C., and then heated to a temperature of 270 to 320 ° C. under a nitrogen stream or under reduced pressure so that the intrinsic viscosity does not decrease.
- the film is supplied to the extruder so as to have a film composition, extruded from a slit-shaped die, and cooled on a casting roll to obtain an unstretched film.
- filters for example, filters made of materials such as sintered metal, porous ceramic, sand and wire mesh, in order to remove foreign substances and denatured polymers.
- a gear pump as needed in order to improve fixed_quantity
- a plurality of different polymers are melt laminated using two or more extruders and manifolds or merging blocks.
- the raw material PET chip is preferably 0.5 to 1.5 dl / g so that the film IV is in a preferable range.
- additives such as compatibilizers, plasticizers, weathering agents, antioxidants, thermal stabilizers, lubricants, antistatic agents, whitening agents, coloring, as long as the effects of the present invention are not impaired.
- Agents, conductive agents, ultraviolet absorbers, flame retardants, flame retardant aids, pigments and dyes may be added.
- the sheet-like material molded as described above is biaxially stretched.
- the film is stretched biaxially in the longitudinal direction and the width direction and heat-treated.
- a sequential biaxial stretching method such as stretching in the width direction after stretching in the longitudinal direction, a simultaneous biaxial stretching method in which the longitudinal direction and the width direction are simultaneously stretched using a simultaneous biaxial tenter, etc.
- Examples include a method in which the sequential biaxial stretching method and the simultaneous biaxial stretching method are combined.
- it is desirable that the heat treatment after the stretching process is effectively performed without causing relaxation of molecular chain orientation due to excessive heat treatment.
- An unstretched film is stretched in the machine direction by utilizing the difference in peripheral speed of the rolls (MD stretching) using a longitudinal stretching machine in which several rolls are arranged, and then laterally stretched by a stenter (TD stretching). ) Will be described in more detail.
- the unstretched film is MD stretched.
- the stretching temperature is preferably in the range of (Tg) to (Tg + 40) ° C., more preferably in the range of (Tg + 5) to (Tg + 30) ° C., and more preferably in the range of (Tg + 10) to (Tg + 20).
- the film is preferably stretched twice, and after stretching, it is preferably cooled by a cooling roll group having a temperature of 20 to 50 ° C.
- the preheating temperature is preferably (cold crystallization temperature of the film after MD stretching + 2) to (cold crystallization temperature of the film after MD stretching + 10).
- the specific preheating temperature is preferably 90 ° C. to 110 ° C., more preferably 95 ° C.
- the stretching temperature is preferably equal to or lower than the preheating temperature, preferably in the range of (preheating temperature) to (preheating temperature ⁇ 20) ° C., and more preferably (preheating temperature ⁇ 5) to (preheating temperature ⁇ 15). It is in the range of ° C.
- the draw ratio is preferably 3.0 to 6.0 times, more preferably 3.5 to 5.5 times, and still more preferably 3.8 to 4.5 times.
- the heat setting temperature (Ths) is preferably 180 to 200 ° C., more preferably 180 to 195 ° C., and further preferably 185 to 195 ° C. If Ths is lower than 180 ° C., structural fixation is insufficient, nZD becomes small, and heat shrinkage rate becomes large. When Ths is too higher than 200 ° C., excessive orientation relaxation occurs, (nMD + nTD) / 2 decreases, and the thermal expansion coefficient deteriorates.
- the heat setting time is preferably in the range of 0.5 to 10 seconds.
- the relaxation rate in the heat setting treatment (hereinafter sometimes abbreviated as Rxhs) is preferably within 3 times the relaxation rate in the subsequent relaxation annealing treatment (hereinafter sometimes abbreviated as Rxa).
- the relaxation rate is a value of the ratio with respect to the difference from the width after the processing on the basis of the width before the treatment. For example, when the relaxation rate is 2 mm, 2% of 2% is relaxed when the width before the treatment is 100 mm. It shows that it becomes 98 mm after processing.
- Rxhs with respect to Rxa exceeds 3 times, orientation relaxation proceeds too much and the thermal expansion coefficient deteriorates.
- Rxhs is preferably 0.1 to 9%.
- the film edge is removed and wound on the core. Furthermore, in order to increase the thermal dimensional stability, the wound biaxially stretched PET film is preferably conveyed under tension under a certain temperature condition to remove the distortion of the molecular structure and reduce the thermal shrinkage rate.
- relaxation annealing is performed.
- the relaxation annealing temperature (hereinafter sometimes abbreviated as Ta) is preferably lower than the heat setting temperature (Ths), preferably (Ths-5) to (Ths-15) ° C., more preferably (Ths ⁇ 7) to (Ths-12) ° C.
- the relaxation annealing treatment time is preferably 1 to 120 seconds, more preferably 5 to 90 seconds, and further preferably 20 to 60 seconds.
- the relaxation rate (Rxa) in the relaxation annealing treatment is preferably 0.1 to 3%, more preferably 0.1 to 1%. If Rxa is less than 0.1%, the effect of relaxation does not appear, the strain removal of the molecular structure is incomplete, and heat shrinkage cannot be reduced.
- the film is annealed while being conveyed at a speed of 10 to 300 m / min, and the biaxially stretched PET film of the present invention can be obtained.
- relaxation annealing treatment may be performed after heat setting.
- the PET film and the PET film roll may be subjected to arbitrary processing such as molding, surface treatment, laminating, coating, printing, embossing and etching as necessary.
- the characteristic value measurement method and the effect evaluation method in the present invention are as follows.
- the refractive index was measured using the following measuring instrument in accordance with JIS-K7142 (2008).
- the following method is used based on the known values.
- the longitudinal direction and the width direction of the film are not known and the shape of the film is substantially rectangular, the long side direction is regarded as the longitudinal direction and the orthogonal direction is regarded as the width direction, and the following method is used. (When the shape of the film is substantially square, any of the directions parallel to each side may be regarded as the longitudinal direction and the width direction).
- the longitudinal direction and width direction of the film other than the refractive index the same applies to (2) and thereafter.
- Thermal expansion coefficient [ppm / ° C.] 10 6 ⁇ ⁇ (dimension at 150 ° C. (mm) ⁇ dimension at 50 ° C. (mm)) / 20 (mm) ⁇ / (150 ° C.-50 ° C.).
- the heat quantity of the endothermic peak of melting observed is the heat of crystal melting
- the endothermic peak temperature is the melting point (Tm)
- the small endothermic peak near Tm (150 ° C. or more and Tm or less) lower than Tm is Tmeta. did.
- Tmeta is observed in the DSC first run because of the thermal history corresponding to the heat setting temperature, and is not observed in the second run where the thermal history is erased once the temperature is increased to Tm or more.
- the degree of crystallinity ( ⁇ c) was calculated from the following equation using the heat of crystal melting ( ⁇ H m ) and the heat of cold crystallization ( ⁇ H c ).
- ⁇ c ( ⁇ H m ⁇ H c ) / ⁇ H m 0
- ⁇ H m 0 heat of fusion of completely crystalline PET
- Glass transition temperature (Tg) Specific heat is measured with the following equipment and conditions, and determined according to JIS K7121 (1987).
- ⁇ Device Temperature modulation DSC manufactured by TA Instrument ⁇ Measurement conditions ⁇ Heating temperature: 270 to 570K (RCS cooling method) ⁇ Temperature calibration: Melting point of high purity indium and tin ⁇ Temperature modulation amplitude: ⁇ 1K ⁇ Temperature modulation period: 60 seconds ⁇ Temperature increase rate: 2 K / min ⁇ Sample weight: 5 mg
- Sample container Aluminum open container (22 mg)
- Reference container Aluminum open container (18mg)
- Haze value of film A 10 cm ⁇ 10 cm sample was cut out from the film and measured using a fully automatic direct reading haze computer HGM-2DP (manufactured by Suga Test Instruments Co., Ltd.) based on JISK7105 (1985). This was measured repeatedly at 10 points, and the average value was taken as the haze value of the film.
- Thermal dimensional stability The biaxially stretched polyethylene terephthalate film of the present invention was cut into a width of 100 mm and a length of 100 mm, and the following transparent conductive layer-organic EL layer was formed assuming an organic flexible device. Thermal dimensional stability was evaluated from the surface resistivity and dimensional change.
- the inside of the chamber was evacuated to 5 ⁇ 10 ⁇ 4 Pa, and then argon and oxygen were introduced into the chamber to a pressure of 0.3 Pa (oxygen partial pressure was 3.7 mPa).
- a transparent conductive layer was formed. If the biaxially oriented polyethylene terephthalate film has a large thermal expansion, the transparent conductive layer cracks and the surface resistivity decreases.
- Evaluation was made according to the following criteria. Evaluation C is unacceptable. AA: The surface resistivity was less than 30 ⁇ / ⁇ , and the transparent conductive layer was formed without any problem. A: The surface resistivity was 30 ⁇ / ⁇ or more and less than 50 ⁇ /, and the transparent conductive layer containing cracks was formed. B: Surface resistivity A transparent conductive layer with a large number of cracks was formed at 50 ⁇ / ⁇ or more and less than 100 ⁇ / C: The surface resistivity was 100 ⁇ / ⁇ or more, or the transparent conductive layer could not be formed due to curl or width shrinkage of the film.
- Hole transport layer A solution obtained by diluting polyethylene dioxythiophene / polystyrene sulfonate (PEDOT / PSS, Baytron P AI 4083 manufactured by Bayer) with 65% pure water and 5% methanol is used as a coating solution for forming a hole transport layer on the entire surface of the transparent conductive layer ( However, excluding 10 mm at both ends) was applied using an extrusion coater so that the thickness after drying was 30 nm. After the application, a hole transport layer was formed by drying and heating at 150 ° C. for 1 hour.
- PEDOT / PSS polystyrene sulfonate
- a toluene solution containing 1% by mass and 0.1% by mass of poly (N-vinyl) carbazole and dopant iridium complex dye [Ir (ppy) 3 ] was formed on the hole transport layer by an extrusion coating method. It vacuum-dried at the temperature of 120 degreeC for 1 hour, and was set as the light emitting layer with a film thickness of about 50 nm.
- ⁇ Electrode transport layer
- a 1-butanol solution containing 0.5% by mass of an electron transport material tris (8-hydroxyquinoline) aluminum [Alq 3 ] was similarly formed by an extrusion coating method. Vacuum drying was performed at a temperature of 60 ° C. for 1 hour to obtain an electron transport layer having a film thickness of about 15 nm. A universal projector was used as the measuring device. Thermal dimensional stability was evaluated according to the following criteria. Evaluation C is unacceptable.
- AA The deformation was less than 200 ⁇ m in both the longitudinal and width directions, and the organic EL layer was formed without any problem, and the organic EL layer emitted light without any problem.
- A The organic EL layer was formed when the deformation amount of at least one of the longitudinal and width directions was 200 ⁇ m or more and less than 500 ⁇ m, and some defects were observed in the organic EL layer.
- C An organic EL layer could not be formed due to wrinkling, curling or width shrinkage of the film.
- a 10 cm ⁇ 10 cm sample was cut from the curl film and placed in an oven at a temperature of 150 ° C. for 30 minutes. Then, after leaving for 30 minutes under the conditions of a temperature of 23 ° C. and 65% RH, the curled state at the four corners was observed, the average value of the amount of warping (mm) at the four corners was obtained, and evaluated according to the following criteria. The curl becomes better as both the thermal expansion coefficient and the thermal contraction rate are smaller. Evaluation C is unacceptable.
- AA The amount of warpage is less than 2.5 mm.
- A The amount of warpage is 2.5 mm or more and less than 5 mm.
- B The amount of warpage is 5 mm or more and less than 10 mm.
- C The amount of warpage is 10 mm or more.
- reaction system was purged with nitrogen and returned to normal pressure to stop the polycondensation reaction, discharged into cold water in the form of a strand, and immediately cut to obtain PET pellet X 0.65 of polyethylene terephthalate having an intrinsic viscosity of 0.65. It was.
- Example 1 The PET pellet X 0.65 having an intrinsic viscosity of 0.65 obtained in Reference Example 1 was supplied to an extruder heated to a temperature of 280 ° C. after being dried under reduced pressure for 3 hours at a temperature of 180 ° C. Introduced into die die. Next, from the inside of the T die die, it was extruded into a sheet shape to obtain a molten single layer sheet, which was closely cooled and solidified by an electrostatic application method on a drum maintained at a surface temperature of 25 ° C. to obtain an unstretched single layer film.
- a relaxation treatment was further performed in the 2% width direction at a temperature of 190 ° C. Subsequently, after uniformly cooling to 25 ° C., the film edge was removed, and the film was wound on a core to obtain a biaxially stretched film having a thickness of 100 ⁇ m.
- relaxation annealing treatment was performed at a relaxation rate of 1% while transporting at a temperature of 180 ° C. for 30 seconds at a film speed of 30 m / min to obtain a biaxially stretched polyethylene terephthalate film.
- the film had excellent thermal dimensional stability and curling properties.
- Example 2 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed.
- the heat treatment temperature sometimes referred to as Ths
- the annealing temperature sometimes referred to as Ta
- nMD + nTD / 2 Becomes smaller and the thermal dimensional stability is excellent.
- Example 3 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, since Ths was somewhat high, as shown in the table, (nMD + nTD / 2) was reduced and the thermal dimensional stability was excellent.
- Example 4 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, since Ths was slightly low, as shown in the table, nZD was reduced and the curling property was excellent.
- Example 5 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, since Ths and Ta were slightly low, as shown in the table, nZD was small and the curling property was excellent.
- Example 6 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, the relaxation rate (sometimes referred to as Rxa) was slightly large, and as shown in the table, (nMD + nTD / 2) was reduced and the thermal dimensional stability was excellent. Had.
- Rxa the relaxation rate
- Example 7 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Rxa was slightly large and Ths and Ta were slightly high. Therefore, as shown in the table, (nMD + nTD / 2) was small and the thermal dimensional stability was slightly inferior. Had.
- Example 8 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Rxa was slightly large and Ths was slightly high. Therefore, as shown in the table, (nMD + nTD / 2) was small and the thermal dimensional stability was slightly inferior. It was.
- Example 9 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Rxa was slightly large and Ths was slightly low, and therefore, as shown in the table, (nMD + nTD / 2) was small and the thermal dimensional stability was excellent. It was.
- Example 10 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Rxa was slightly large and Ths and Ta were slightly low. Therefore, as shown in the table, (nMD + nTD / 2) was small, and the thermal dimensional stability was excellent. Was.
- Example 11 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, since Rxa was slightly small, as shown in the table, nZD was small and the curling property was excellent.
- Example 12 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Rxa was slightly small, but Ta was slightly high. Therefore, as shown in the table, the film had considerably excellent thermal dimensional stability and curling properties.
- Example 13 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Rxa was slightly small and Ta was slightly low. Therefore, as shown in the table, nZD was small and the curling property was excellent.
- Example 14 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Rxa was slightly small and Ths was slightly high. Therefore, as shown in the table, (nMD + nTD / 2) was small and the thermal dimensional stability was excellent. It was.
- Example 15 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Rxa was slightly small and Ths was slightly high. Therefore, as shown in the table, (nMD + nTD / 2) was small and the thermal dimensional stability was excellent. It was.
- Example 16 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Rxa was slightly small and Ths was slightly high. Therefore, as shown in the table, (nMD + nTD / 2) was small and the thermal dimensional stability was excellent. It was.
- Example 17 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Rxa was slightly small and Ths was slightly low. Therefore, as shown in the table, nZD was small and the curl property was slightly inferior.
- Example 18 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Rxa was slightly small and Ths was slightly low. Therefore, as shown in the table, nZD was small and the curl property was slightly inferior.
- Example 19 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Rxa was slightly small, and Ths and Ta were slightly low. Therefore, as shown in the table, nZD was small and the curl property was slightly inferior.
- Example 20 A biaxially stretched polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat treatment temperature before transverse stretching was 90 ° C.
- the formation of microcrystals before transverse stretching was small and the nodal point effect was small, and as shown in the table, (nMD + nTD / 2) was small and thermal dimensional stability was improved. It had excellent properties.
- Example 21 A biaxially stretched polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the longitudinal stretch ratio was 3.1 times, the lateral stretch ratio was 3.8 times, and the heat treatment temperature before transverse stretching was 100 ° C.
- the draw ratio was low, as shown in the table, (nMD + nTD / 2) was small, and the thermal dimensional stability was slightly inferior.
- Example 2 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Rxa was zero. Therefore, as shown in the table, nZD was out of the range and the curling property was inferior.
- Example 3 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Rxa was zero. Therefore, as shown in the table, nZD was out of the range and the curling property was inferior.
- Example 4 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Rxa was zero. Therefore, as shown in the table, nZD was out of the range and the curling property was inferior.
- Example 5 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Rxa was zero. Therefore, as shown in the table, nZD was out of the range and the curling property was inferior.
- Example 6 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Rxa was zero. Therefore, as shown in the table, nZD was out of the range and the curling property was inferior.
- Example 7 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Rxa was zero. Therefore, as shown in the table, nZD was out of the range and the curling property was inferior.
- Example 8 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Rxa was zero. Therefore, as shown in the table, nZD was out of the range and the curling property was inferior.
- Example 9 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Rxa was zero. Therefore, as shown in the table, nZD was out of the range and the curling property was inferior.
- Example 10 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Ta was too high, and as shown in the table, (nMD + nTD / 2) was outside the range, and the thermal dimensional stability was poor.
- Example 11 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, since Ths was too high, as shown in the table, (nMD + nTD / 2), nZD was out of the range, and the thermal dimensional stability was inferior. .
- Example 12 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, since Ths was too low, as shown in the table, nZD was out of the range and the curling property was inferior.
- Example 13 As shown in Table 1, a biaxially oriented polyethylene terephthalate film was obtained in the same manner as in Example 1 except that the heat setting treatment conditions and the relaxation annealing treatment conditions were changed. When the obtained biaxially oriented polyethylene terephthalate film was evaluated, Ta was too low, and as shown in the table, nZD was out of the range and the curling property was poor.
- the biaxially oriented polyethylene terephthalate film of the present invention can be applied to a base film for flexible devices having excellent thermal dimensional stability and curling properties. Therefore, there is a possibility of being used to obtain organic EL displays, electronic paper, organic EL lighting, organic solar cells, dye-sensitized solar cells, and the like.
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Abstract
Description
本発明の二軸配向ポリエチレンテレフタレートフィルムの好ましい態様によれば、微小融解ピーク(T-meta)が180~200℃である。
式1 nZD≧-0.8×((nMD+nTD)/2)+2.826。
本発明における特性値の測定方法並びに効果の評価方法は、次のとおりである。
JIS-K7142(2008年)に従って、下記測定器を用いて測定した。
なお、本発明において、フィルムのnMD、nTDを求めるに際し、フィルムの長手方向、幅方向が既知の場合はそれにもとづき以下の方法で求める。一方、フィルムの長手方向、幅方向が既知ではない場合であって、フィルムの形状が略長方形である場合は、長辺方向を長手方向、その直交方向を幅方向とみなして以下の方法で求めてもよい(フィルムの形状が略正方形である場合は、各辺に平行な方向のいずれを長手方向、幅方向とみなしてもよい)。屈折率以外のフィルムの長手方向、幅方向に関し、(2)以下も同様である。
・装置:アッベ屈折計 4T(株式会社アタゴ社製)
・光源:ナトリウムD線
・測定温度:25℃
・測定湿度:65%RH
・マウント液:ヨウ化メチレン、硫黄ヨウ化メチレン
nMD;フィルム長手方向の屈折率
nTD;フィルム幅方向の屈折率
nZD;フィルム厚み方向の屈折率
長手方向と幅方向の平均屈折率=((nMD+nTD)/2)。
面配向係数(fn)=((nMD+nTD)/2)-nZD。
JIS K7197(1991年)に準拠し、下記の条件で、試料数3にてフィルムの長手方向および幅方向それぞれについて測定をして、平均値をとり、長手方向と幅方向の熱膨張係数とした。
・測定装置 :セイコーインスツルメンツ社製“TMA/SS6000”
・試料サイズ:幅4mm、長さ20mm
・温度条件 :5℃/minで30℃から175℃に昇温し、10分間保持
・さらに5℃/minで175℃から40℃まで降温して20分保持
・荷重条件 :29.4mN一定
ここで、熱膨張係数の測定範囲温度は、降温時の150℃から50℃である。熱膨張係数は、下記式から算出した。
熱膨張係数[ppm/℃]=106×{(150℃時の寸法(mm)-50℃時の寸法(mm))/20(mm)}/(150℃-50℃)。
下記装置および条件で、熱収縮率測定を行った。
・測長装置 :万能投影機
・資料サイズ :試長150m×幅10mm
・熱処理装置 :ギアオーブン
・熱処理条件 :150℃、30分
・算出方法
熱処理前にサンプルに100mmの間隔で標線を描き、上記の条件(おもり3g、150℃、30分)で熱処理を行い、熱処理後の標線間距離を測定し、加熱前後の標線間距離の変化から熱収縮率を算出し、熱寸法安定性の指標とした。測定は、各フィルムとも長手方向および幅方向に5サンプル実施して平均値で評価を行った。
JIS K7121-1987に従って、示差走査熱量計として、セイコーインスツルメンツ社製DSC(RDC220)、データ解析装置として同社製ディスクステーション(SSC/5200)を用いて、試料5mgをアルミニウム製受皿上、25℃から300℃まで、昇温速度20℃/分で昇温した。そのとき、観測される融解の吸熱ピークのピークの熱量を結晶融解熱量、吸熱ピーク温度を融点(Tm)、Tmより低温側でTm近傍にある(150℃以上Tm以下)微小吸熱ピークをTmetaとした。(なお、Tmetaは、熱固定温度に対応する熱履歴のため、DSCのファーストランで観測され、一度Tm以上に昇温し熱履歴を消したセカンドランでは観測されないことから確認できる。)
結晶化度(Χc)は結晶融解熱量(ΔHm)と冷結晶化熱量(ΔHc)を用い下記式より算出した。
Χc=(ΔHm-ΔHc)/ΔHm 0
ここで、ΔHm 0(完全結晶PETの融解熱量)は140.10J/g。
下記装置および条件で比熱測定を行い、JIS K7121(1987年)に従って決定する。
・装置 :TA Instrument社製温度変調DSC
・測定条件
・加熱温度 :270~570K(RCS冷却法)
・温度校正 :高純度インジウムおよびスズの融点
・温度変調振幅:±1K
・温度変調周期:60秒
・昇温速度 :2K/分
・試料重量 :5mg
・試料容器 :アルミニウム製開放型容器(22mg)
・参照容器 :アルミニウム製開放型容器(18mg)
ガラス転移温度は、下記式により算出する。
ガラス転移温度=(補外ガラス転移開始温度+補外ガラス転移終了温度)/2。
フィルムから10cm×10cmの試料を切り出して、JISK7105(1985年)に基づいて、全自動直読ヘイズコンピューターHGM-2DP(スガ試験機(株)製)を用いて測定した。これを無作為に10点くり返し測定し、その平均値を該フィルムのヘイズ値とした。
本発明の二軸延伸ポリエチレンテレフタレートフィルムを、幅100mm×長さ100mmに切り出し、有機フレキシブルデバイスを想定して、下記の透明導電層-有機EL層を形成し、そのときの表面抵抗率や寸法変化から熱寸法安定性を評価した。
プラズマの放電前にチャンバー内を5×10-4Paまで排気した後、チャンバー内にアルゴンと酸素を導入して圧力を0.3Pa(酸素分圧は3.7mPa)としターゲットとして酸化スズを36質量%含有した酸化インジウム(住友金属鉱山社製、密度6.9g/cm3)に用いて2W/cm2の電力密度で電力を印加して直流マグネトロンスパッタリング法により、膜厚250nmのITOからなる透明導電層を形成した。透明導電層は二軸配向ポリエチレンテレフタレートフィルムの熱膨張が大きいとクラックが入り表面抵抗率が低下する。下記の基準に従って評価した。評価Cが不合格である。
AA:表面抵抗率が30Ω/□未満で問題なく透明導電層が形成された
A:表面抵抗率が30Ω/□以上、50Ω/未満でクラックを含む透明導電層が形成された
B:表面抵抗率が50Ω/□以上、100Ω/未満でクラックの多い透明導電層が形成された
C:表面抵抗率が100Ω/□以上か、フィルムのカールや幅縮みで透明導電層が形成できなかった
・(正孔輸送層)
ポリエチレンジオキシチオフェン・ポリスチレンスルホネート(PEDOT/PSS、Bayer社製 Bytron P AI 4083)を純水65%、メタノール5%で希釈した溶液を正孔輸送層形成用塗布液として、透明導電層上全面(但し、両端の10mmは除く)に、エクストルージョン塗布機を使用し乾燥後の厚みが30nmになるように塗布した。塗布後、150℃の温度で1時間の乾燥・加熱処理を行い正孔輸送層を形成した。
正孔輸送層上に、ポリ(N-ビニル)カルバゾール、ドーパントイリジウム錯体染料[Ir(ppy)3]をそれぞれ1質量%、0.1質量%含むトルエン溶液をエクストルージョン塗布法により製膜した。120℃の温度で1時間真空乾燥し、膜厚約50nmの発光層とした。
発光層上に、0.5質量%の電子輸送材料トリス(8-ヒドロキシキノリン)アルミニウム[Alq3]を含有する1-ブタノール溶液を同様にエクストルージョン塗布法により製膜した。60℃の温度で1時間真空乾燥し、膜厚約15nmの電子輸送層とした。測長装置には、万能投影機を用いた。熱寸法安定性を次の基準に従って評価した。評価Cが不合格である。
AA:長手、幅方向ともに変形量が200μm未満で問題なく有機EL層が形成され、有機EL層が問題なく発光した。
A:長手、幅方向の少なくとも一方の変形量が200μm以上、500μm未満で有機EL層が形成され、有機EL層に一部欠陥が見られた。
B:長手、幅方向の少なくとも一方の変形量が500μm以上、またはシワの発生や有機EL層の塗布ムラが起こり、有機EL層の発光にムラや欠陥が見られた。
C:フィルムのシワ、カールや幅縮みなどで有機EL層が形成できなかった。
フィルムから10cm×10cmの試料を切り出して温度150℃で30分間オーブンに置いた。その後、温度23℃、65%RHの条件で30分放置してから、4隅のカール状態を観測し、4隅の反り量(mm)の平均値を求めて、下記の基準に従って評価した。カールは熱膨張係数と熱収縮率の両方が小さいほど良好となる。評価Cが不合格である。
AA:反り量が2.5mm未満である。
A:反り量が2.5mm以上、5mm未満である。
B:反り量が5mm以上、10mm未満である。
C:反り量が10mm以上である。
テレフタル酸ジメチル194質量部とエチレングリコール124質量部とをエステル交換反応装置に仕込み、内容物を140℃の温度に加熱して溶解した。その後、内容物を撹拌しながら、酢酸マグネシウム四水和物0.3質量部および三酸化アンチモン0.05質量部を加え、これに140~230℃の温度でメタノールを留出しつつエステル交換反応を行った。次いで、リン酸トリメチルの5質量%エチレングリコール溶液を、1質量部(リン酸トリメチルとして0.05質量部)添加した。リン酸トリメチルのエチレングリコール溶液を添加すると、反応内容物の温度が低下する。そこで、余剰のエチレングリコールを留出させながら反応内容物の温度が230℃の温度に復帰するまで撹拌を継続した。このようにして、エステル交換反応装置内の反応内容物の温度が230℃の温度に達した後、反応内容物を重合装置へ移行した。移行後、反応系を230℃の温度から290℃の温度まで徐々に昇温するとともに、圧力を0.1kPaまで下げた。最終温度、最終圧力到達までの時間はともに60分とした。最終温度、最終圧力に到達した後、2時間(重合を始めて3時間)反応させたところ、重合装置の撹拌トルクが所定の値(重合装置の仕様によって具体的な値は異なるが、本重合装置において固有粘度0.65のポリエチレンテレフタレートが示す値を所定の値とした)を示した。そこで、反応系を窒素パージし常圧に戻して重縮合反応を停止し、冷水にストランド状に吐出し、直ちにカッティングして、固有粘度0.65のポリエチレンテレフタレートのPETペレットX0.65を得た。
280℃の温度に加熱された押出機に、参考例1で得られた固有粘度0.65のPETペレットX0.65を180℃の温度で3時間減圧乾燥した後に供給し、窒素雰囲気下Tダイ口金に導入した。次いで、Tダイ口金内から、シート状に押出して溶融単層シートとし、表面温度25℃に保たれたドラム上に静電印加法で密着冷却固化させて未延伸単層フィルムを得た。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、熱処理温度(Thsということがある。)とアニール温度(Taということがある。)がやや高いため、表に示すように、(nMD+nTD/2)が小さくなり熱寸法安定性が優れる特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Thsがやや高いため、表に示すように、(nMD+nTD/2)が小さくなり熱寸法安定性が優れる特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Thsがやや低いため、表に示すように、nZDが小さくなりカール性が優れる特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、ThsとTaがやや低いため、表に示すように、nZDが小さくなりカール性が優れる特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、弛緩率(Rxaということがある。)がやや大きいため、表に示すように、(nMD+nTD/2)が小さくなり熱寸法安定性が優れる特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがやや大きく、ThsとTaがやや高いため、表に示すように、(nMD+nTD/2)が小さくなりやや熱寸法安定性が劣る特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがやや大きく、Thsがやや高いため、表に示すように、(nMD+nTD/2)が小さくなりやや熱寸法安定性が劣る特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがやや大きく、Thsがやや低いため、表に示すように、(nMD+nTD/2)が小さくなり熱寸法安定性が優れる特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがやや大きく、ThsとTaがやや低いため、表に示すように、(nMD+nTD/2)が小さくなり熱寸法安定性が優れる特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがやや小さいため、表に示すように、nZDが小さくなりカール性が優れる特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがやや小さいが、Taがやや高いため、表に示すように熱寸法安定性、カール性にかなり優れた特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがやや小さく、Taがやや低いため、表に示すように、nZDが小さくなりカール性が優れる特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがやや小さく、Thsがやや高いため、表に示すように、(nMD+nTD/2)が小さくなり熱寸法安定性が優れる特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがやや小さく、Thsがやや高いため、表に示すように、(nMD+nTD/2)が小さくなり熱寸法安定性が優れる特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがやや小さく、Thsがやや高いため、表に示すように、(nMD+nTD/2)が小さくなり熱寸法安定性が優れる特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがやや小さく、Thsがやや低いため、表に示すように、nZDが小さくなりややカール性が劣る特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがやや小さく、Thsがやや低いため、表に示すように、nZDが小さくなりややカール性が劣る特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがやや小さく、ThsとTaがやや低いため、表に示すように、nZDが小さくなりややカール性が劣る特性を有していた。
横延伸前の熱処理温度を90℃にした以外、実施例1と同様の方法で二軸延伸ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、横延伸前の微結晶の形成が少なく結節点効果が小さくなり、表に示すように、(nMD+nTD/2)が小さくなり熱寸法安定性が優れる特性を有していた。
縦延伸倍率を3.1倍、横延伸倍率を3.8倍にし、横延伸前の熱処理温度を100℃にした以外、実施例1と同様の方法で二軸延伸ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、延伸倍率が低いため、表に示すように、(nMD+nTD/2)が小さくなりやや熱寸法安定性が劣る特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがゼロであるため、表に示すように、nZDが範囲外になりカール性が劣る特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがゼロであるため、表に示すように、nZDが範囲外になりカール性が劣る特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがゼロであるため、表に示すように、nZDが範囲外になりカール性が劣る特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがゼロであるため、表に示すように、nZDが範囲外になりカール性が劣る特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがゼロであるため、表に示すように、nZDが範囲外になりカール性が劣る特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがゼロであるため、表に示すように、nZDが範囲外になりカール性が劣る特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがゼロであるため、表に示すように、nZDが範囲外になりカール性が劣る特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがゼロであるため、表に示すように、nZDが範囲外になりカール性が劣る特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Rxaがゼロであるため、表に示すように、nZDが範囲外になりカール性が劣る特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Taが高すぎるため、表に示すように、(nMD+nTD/2)が範囲外になり熱寸法安定性が劣る特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Thsが高すぎるため、表に示すように、(nMD+nTD/2)、nZDが範囲外になり熱寸法安定性が劣る特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Thsが低すぎるため、表に示すように、nZDが範囲外になりカール性が劣る特性を有していた。
表1に示すように熱固定処理条件と弛緩アニール処理条件を変更すること以外、実施例1と同様の方法で二軸配向ポリエチレンテレフタレートフィルムを得た。得られた二軸配向ポリエチレンテレフタレートフィルムを評価したところ、Taが低すぎるため、表に示すように、nZDが範囲外になりカール性が劣る特性を有していた。
Claims (9)
- 少なくともポリエチレンテレフタレート樹脂を用いてなる二軸配向フィルムであって、フィルム長手方向の屈折率nMDと幅方向の屈折率nTDの平均((nMD+nTD)/2)が1.655~1.70であり、フィルム厚み方向の屈折率nZDが1.490~1.520であることを特徴とする二軸配向ポリエチレンテレフタレートフィルム。
- フィルム長手方向、幅方向、および、厚み方向の屈折率の関係が下記式で表される請求項1に記載の二軸配向ポリエチレンテレフタレートフィルム。
式1 nZD≧-0.8×((nMD+nTD)/2)+2.826 - フィルム長手方向、および、幅方向ともに150℃の温度における熱収縮率が0~0.5%である請求項1または2に記載の二軸配向ポリエチレンテレフタレートフィルム。
- フィルム長手方向、および、幅方向ともに50~150℃の温度における熱膨張係数が0~25ppm/℃である請求項1~3のいずれかに記載の二軸配向ポリエチレンテレフタレートフィルム。
- 微小融解ピーク(T-meta)が180~200℃である請求項1~4のいずれかに記載の二軸配向ポリエチレンテレフタレートフィルム。
- フィルム長手方向の屈折率(nMD)と幅方向の屈折率(nTD)、フィルム厚み方向の屈折率(nZD)から求められる面配向係数(fn)/結晶化度(Χc)が0.45~0.65である請求項1~5のいずれかに記載の二軸配向ポリエチレンテレフタレートフィルム。
- 結晶化度(Χc)が0.25~0.35である請求項1~6のいずれかに記載の二軸配向ポリエチレンテレフタレートフィルム。
- フィルムヘイズが0~5%である請求項1~7のいずれかに記載の二軸配向ポリエチレンテレフタレートフィルム。
- 請求項1~8のいずれかに記載の二軸配向ポリエチレンテレフタレートフィルムを用いてなるフレキシブルデバイス基材用フィルム。
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US14/000,441 US20130323487A1 (en) | 2011-02-21 | 2012-02-17 | Biaxially oriented polyethylene terephthalate film |
JP2012509419A JP5962506B2 (ja) | 2011-02-21 | 2012-02-17 | 二軸配向ポリエチレンテレフタレートフィルム |
EP12749575.2A EP2679378A4 (en) | 2011-02-21 | 2012-02-17 | BIAXIALLY ORIENTED POLYETHYLENEEPHTHALATE FILM |
CN201280004016.9A CN103249540B (zh) | 2011-02-21 | 2012-02-17 | 双轴取向聚对苯二甲酸乙二醇酯膜 |
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EP (1) | EP2679378A4 (ja) |
JP (1) | JP5962506B2 (ja) |
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Also Published As
Publication number | Publication date |
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CN103249540B (zh) | 2016-08-31 |
KR20140003434A (ko) | 2014-01-09 |
TW201240796A (en) | 2012-10-16 |
TWI549804B (zh) | 2016-09-21 |
KR101981080B1 (ko) | 2019-05-22 |
EP2679378A4 (en) | 2015-07-29 |
JP5962506B2 (ja) | 2016-08-03 |
US20130323487A1 (en) | 2013-12-05 |
EP2679378A1 (en) | 2014-01-01 |
CN103249540A (zh) | 2013-08-14 |
JPWO2012114988A1 (ja) | 2014-07-07 |
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