WO2006025344A1 - 離型用ポリエステルフィルム - Google Patents
離型用ポリエステルフィルム Download PDFInfo
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- WO2006025344A1 WO2006025344A1 PCT/JP2005/015692 JP2005015692W WO2006025344A1 WO 2006025344 A1 WO2006025344 A1 WO 2006025344A1 JP 2005015692 W JP2005015692 W JP 2005015692W WO 2006025344 A1 WO2006025344 A1 WO 2006025344A1
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- 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
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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
-
- 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
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
- B32B17/10018—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising only one glass sheet
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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
-
- 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
-
- 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
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
- C08G63/82—Preparation processes characterised by the catalyst used
- C08G63/85—Germanium, tin, lead, arsenic, antimony, bismuth, titanium, zirconium, hafnium, vanadium, niobium, tantalum, or compounds thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
-
- 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
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/256—Heavy metal or aluminum or compound thereof
Definitions
- the present invention relates to a polyester film for mold release, and more specifically, it can be used for various applications such as for ceramic mold release, and the amount of oligomer deposited, particularly the amount of oligomer deposited on the film surface even under high temperature processing conditions.
- the present invention relates to a polyester film for mold release that is excellent in appearance and capable of performing an accurate inspection in a cross-col method inspection of a polarizing plate.
- Polyester films represented by polyethylene terephthalate and polyethylene naphthalate have excellent properties such as mechanical strength, dimensional stability, flatness, heat resistance, chemical resistance, and optical properties. It is used in various applications because of its excellent performance.
- the processing conditions and use conditions of the film have diversified, and when the polyester film is heat-treated, the oligomer that has exuded from the inner surface is deposited on the film surface. It has come out.
- oligomer deposition on the film surface is severe, various problems occur, such as when oligomers adhere to the process during film processing and become contaminated, or cannot be used for applications that require high transparency. .
- the oligomer contained in the raw material is reduced by solid-phase polymerization (see, for example, Patent Document 1), or a polyester using a terminal blocking agent is used.
- the hydrolysis resistance of the film has been improved.
- solid-phase polymerized raw materials satisfy the prevention of oligomer precipitation on the film surface, such as by the fact that, depending on the film production conditions, an effect is not seen due to the formation of oligomers by heating. Not so far.
- the demand for clean films with fewer foreign substances has increased, and in particular, fine film is melted when the polyester raw material is melted.
- release films based on polyester films have been used for various applications such as liquid crystal display panel protection and ceramic release.
- the release film can be used as a protective film for adhesive surfaces such as pressure-sensitive adhesives, adhesives, and adhesives, or a sheet of curable resin such as urethane resin, epoxy resin, unsaturated polyester resin, or ceramic sheet. It is used as a carrier seat for this purpose, and its amount is expanding.
- oligomers that precipitate on the surface of the release layer or on the surface where the release layer is not provided at a high temperature can cause various problems in the production process.
- the manufacturing process for ceramic mold release consists of a process in which a ceramic slurry is applied to the mold release surface, followed by a drying process, and the green sheet is wound into a roll with the release film being laminated. It is considered that oligomers are precipitated in the drying process after coating. Oligomer deposited on the surface of the release layer is transferred to the surface of the green sheet in contact with the release surface. For example, when a ceramic laminated capacitor is manufactured using a green sheet to which the oligomer is attached, the green sheets are laminated together. In some cases, the adhesive strength between sheets decreases.
- the oligomer that is deposited on the surface where the release layer is not provided is transferred to the roll surface of the transport roll, and if the processing is continued, it accumulates on the surface of the oligomer roll and causes roll contamination.
- the drying temperature higher, particularly in the drying process, along with the high speed in the manufacturing process. The situation is easy.
- release films based on polyester films have been used for various applications such as liquid crystal display panel protection and ceramic release.
- the problem with using a release film is that oligomers that precipitate on the surface of the release layer or on the surface where the release layer is not provided are produced at high temperatures. It is possible to cause various problems during the manufacturing process!
- the manufacturing process includes strengths such as a process in which the release film and the polarizing substrate are bonded together via an adhesive layer and wound into a roll.
- the oligomer is precipitated in the drying process after the application of the adhesive.
- the release film may require transparency for use, and examples thereof include an inspection process during the production of a polarizing plate and a retardation plate.
- an inspection process during the production of a polarizing plate and a retardation plate.
- visual inspection or Measures to prevent the outflow of defective products by using a magnifying glass are currently taken, but if the release film is not sufficiently transparent, it is easy to overlook foreign matter mixed in the product. The problem is that the outflow rate of defective products increases.
- polyester films have been used to protect optical applications such as liquid crystal polarizing plates, cathode ray tubes, PDPs, and other displays. Yes.
- the appearance of foreign matters such as oligomers on the film surface may cause problems in appearance.
- LCD displays that are thinner and lighter, have lower power consumption, and have higher image quality than CRTs, which are conventional displays (
- the demand for LCD) is growing remarkably, and the technology is also growing significantly for LCDs with larger screens.
- LCDs have recently been used for large TV applications, for example, 30 inches or more.
- LCDs with large screens often have bright LCDs with large screens by increasing the brightness of the backlight built into the LCD or incorporating a film that improves brightness into the liquid crystal unit.
- the production process includes strengths such as a process in which the release film and the polarizing substrate are bonded together via an adhesive layer and wound into a roll.
- the oligomer is precipitated in the drying process after the application of the adhesive.
- the oligomer deposited on the surface of the release layer is transferred to the surface of the adhesive layer on the other side of the laminate and the polarizing substrate with the adhesive layer to which the oligomer is attached is bonded to a glass substrate, It may cause problems such as a decrease in brightness.
- a visual inspection by a cross-col method is generally used as a defect inspection of a polarizing plate.
- an automatic foreign matter using the cross nicols method is used.
- This cross-col method which is also being inspected by an inspection device, makes two polarizing plates extinguish with their orientation main axes orthogonal to each other, and if there is a foreign object or defect, it will appear as a bright spot. This is a method that enables defect inspection.
- a polyester film having a release layer provided through an adhesive layer is used for the polarizing plate, and the ability to perform cross-nicols inspection with the release polyester film sandwiched between two polarizing plates.
- a release polyester film when used for this, it may become an obstacle to the inspection of the cross-col method, and it may be easy to overlook foreign matters and defects.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-119271
- Patent Document 2 Japanese Patent Laid-Open No. 2000-338327
- the present invention has been made in view of the above circumstances, and its purpose is (1) Polyester for mold release, which can be used for various applications such as ceramic mold release, and has an extremely small amount of oligomer precipitation. Providing a film, (2) Providing a polyester film for release with good transparency and a very low oligomer precipitation amount that can be used for protecting liquid crystal display panels such as polarizing plates and retardation plates.
- Polyesters suitable for protective films used in optical applications such as liquid crystal polarizing plates and displays with little oligomer precipitation (4) Providing a film with excellent appearance when used as an optical film, with very little oligomer precipitating on the film surface even under high temperature processing conditions, (5) For example, it is intended to provide a polyester film for a release film that can perform an accurate inspection in the inspection of a polarizing plate by a cross-col method.
- the present inventors have intensively studied. As a result, the above problems can be achieved by a polyester film having a polyester layer containing a specific amount of a titanium compound and a phosphorus compound. As a result, the present invention has been completed.
- a first gist of the present invention is a polyester for release having a polyester layer comprising a polyester layer containing an amount of a titanium compound and a phosphorus compound that simultaneously satisfy the following formulas (1) and (2): Exist.
- W is titanium element content (ppm) in the polyester layer, W is polyester
- a second aspect of the present invention is a liquid crystal display panel protective separation characterized by having a polyester layer containing a titanium compound and a phosphorus compound in an amount that simultaneously satisfies the following formulas (1) and (2). It exists in polyester film for molds.
- W is the content of titanium element in the polyester layer (ppm), W is polyester)
- a third gist of the present invention is a polyester for a protective film, characterized by having a polyester layer containing a titanium compound and a phosphorus compound in an amount that simultaneously satisfies the following formulas (1) and (2): Be on film. [0028] [Equation 3]
- W is the content of titanium element in the polyester layer (ppm), W is polyester)
- a fourth gist of the present invention is a polyester for an optical film characterized by having a polyester layer containing an amount of a titanium compound and a phosphorus compound that simultaneously satisfy the following formulas (1) and (2): Be on film.
- W is the titanium element content (ppm) in the polyester layer, and W is the polyester.
- W is the titanium element content (ppm) in the polyester layer, and W is the polyester.
- the release polyester film of the present invention can be used for various applications such as ceramic release, and the amount of oligomer precipitation, especially the amount of oligomer deposited on the film surface even under high temperature processing conditions, is extremely high.
- Can be used to protect liquid crystal display plates such as polarizing plates and retardation plates has good transparency, and is suitable for protective films used for optical purposes such as liquid crystal polarizing plates and displays. When used, it is particularly excellent in appearance and can be used for accurate inspection in the cross-coll inspection of polarizing plates.
- the polyester film described in the first to fifth aspects of the present invention is a film stretched as necessary after cooling a molten polyester sheet extruded by a so-called extrusion method, which is melt-extruded from an extrusion die. .
- the “polyester film described in the first to fifth aspects” is simply abbreviated as a polyester film or film.
- the polyester constituting the film of the present invention is obtained by polycondensation of an aromatic dicarboxylic acid and an aliphatic glycol.
- aromatic dicarboxylic acid include terephthalic acid and 2,6-naphthalenedicarboxylic acid
- examples of the aliphatic glycol include ethylene glycol, diethylene glycol, and 1,4-cyclohexanedimethanol.
- Typical polyesters include polyethylene terephthalate (PET), polyethylene-2,6-naphthalenedicarboxylate (PEN), and the like.
- PET polyethylene terephthalate
- PEN polyethylene-2,6-naphthalenedicarboxylate
- the polyester used may be a homopolyester or a copolyester. In the case of the copolymer polyester, any copolymer containing 30 mol% or less of the third component may be used.
- dicarboxylic acid component of the strong copolyester examples include isophthalic acid, phthalic acid, terephthalic acid, 2,6-naphthalenedicarboxylic acid, adipic acid, sebacic acid and oxycarboxylic acid (for example, P-oxybenzoic acid) )
- the glycol component includes ethylene glycol, diethylene glycol, propylene glycol, butanediol, 1,4-cyclohexanedimethanol, neopentyl glycol and the like. More than species.
- At least one layer of the polyester film of the present invention needs to contain both a titanium compound and a phosphorus compound.
- the titanium element content in at least one layer of the film of the present invention must be 20 ppm or less, preferably 10 ppm or less, and the lower limit is usually 1 ppm, preferably 2 ppm.
- the productivity of the polyester raw material is inferior, and the polyester raw material having the desired degree of polymerization cannot be obtained.
- the amount of phosphorus element needs to be 1 ppm or more, preferably 5 ppm or more, and the upper limit is 300 ppm, preferably 200 ppm, more preferably lOOppm.
- the layer containing the titanium compound and the phosphorus compound preferably contains no antimony element. Usually, it is not more than lOOppm, preferably not more than 60ppm, most preferably substantially. No, that is, lOppm or less. If the amount of the antimony element is too large, it may be reduced by the phosphorus compound during melt extrusion and aggregate to cause foreign matter, or the film may become dark and the transparency may be impaired.
- the polyester constituting the layer containing the titanium compound and the phosphorus compound within the above range may be obtained by a melt polymerization reaction.
- Use of a raw material obtained by solid-phase polymerization of wrinkled polyester is preferred because the amount of oligomers contained in the raw material can be reduced.
- the amount of oligomer contained in the layer containing the titanium compound and the phosphorus compound within the above range is preferably 0.7% by weight or less, more preferably 0.5% by weight or less. Particularly preferably, it is 0.3% by weight or less.
- the amount of oligomer in the polyester layer is small, the effect of reducing the amount of oligomer contained in the polyester film of the present invention and preventing oligomer precipitation on the film surface is particularly high.
- a film having a structure in which the oligomer content is low and / or polyester is coextruded on at least one surface of the polyester layer having a normal oligomer content When it has such a structure, the effect of suppressing the oligomer precipitation obtained in the present invention can be exhibited to a high degree.
- Oligomer deposition amount to the is usually 5. OmgZm 2 or less, and preferably 3. OmgZm 2 hereinafter, and still more preferably 1. OmgZm 2 below.
- the amount of oligomer on the film surface after applying methylethylketone to the film, drying and heat-treating at 180 ° C. for 10 minutes is 5. OmgZm 2 or less, preferably 3. OmgZm 2 The following is more preferable: 1. OmgZm 2 or less.
- the amount of oligomer here refers to the amount of cyclic trimer (polyester-derived oligomer) measured by the method described later. If the oligomer precipitation amount of the film surface is more than 5. OmgZm 2, and evil I spoon of film haze, the problem that an oligomer the transport rollers in contact with the full Ilm in the coating process is collected and deposited occurs.
- the difference ( ⁇ ) between the film haze (H) after heat-treating the film of the present invention at 180 ° C for 60 minutes and the film haze (H) before heat treatment is preferably 5.0% or less, More preferred
- the polyester obtained in the present invention includes a weather resistance agent, a light resistance agent, an antistatic agent, a lubricant, a light shielding agent, an antioxidant, a fluorescent whitening agent, and a matting agent, as long as the gist of the present invention is not impaired.
- a heat stabilizer and a colorant such as a dye or a pigment may be blended. If necessary, inert inorganic or organic fine particles may be added to the polyester for the purpose of improving the slipperiness or abrasion resistance of the film.
- Particles to be blended in the film include silicon oxide, alumina, calcium carbonate, force orin, titanium oxide, and crosslinked polymer fine powder as described in JP-B-59-5216. And so on. These particles may be used alone or in combination of two or more components.
- the content thereof is usually 1% by weight or less, preferably 0.01 to 1% by weight, and more preferably 0.02 to 0.5% by weight.
- the content of the particles is small, the film surface tends to be flat and the winding characteristics in the film production process tend to be inferior.
- the content of the particles exceeds 1% by weight, the degree of roughening of the film surface becomes too large and the transparency may be impaired.
- the average particle diameter of the particles contained in the polyester film is not particularly limited. Usually 0.02 to 5 111, preferably 0.02 to 3 111, and more preferably 0.02-2. ⁇ m range.
- the particle size is less than 0.02 ⁇ m, the film surface tends to be flat and the winding characteristics in the film production process tend to be inferior.
- the particle size exceeds 5 m, the degree of roughening of the film surface becomes too large and the transparency of the film may be impaired.
- a method of blending particles only in the surface layer is also preferably employed.
- the front layer is at least one of the front and back layers, and it is of course possible to add particles to both the front and back layers.
- a method of blending the particles with the polyester a known method that is not particularly limited may be employed.
- the strength that can be added at any stage of producing the polyester preferably as a slurry dispersed in ethylene glycol or the like at the stage of esterification, or at the stage of completion of the ester exchange reaction and before the start of the polycondensation reaction.
- the polycondensation reaction may proceed.
- a method of blending a slurry of particles dispersed in ethylene glycol or water with a vented kneading extruder and a polyester raw material or a method of blending particles dried with a kneading extruder and a polyester raw material. It is done by the method of blending.
- the thickness of the film described in the first, second and fifth aspects of the present invention is not particularly limited as long as it can be formed into a film, but usually 4 to 50 111, Preferably it is the range of 9-38 micrometers. Further, the thickness of the layer containing titanium element and phosphorus element is preferably 0.5 m or more, more preferably 1 ⁇ m, particularly preferably 2 ⁇ m or more.
- the thickness of the film described in the third aspect of the present invention is not particularly limited as long as it is within a range capable of being formed as a film. However, when used as a protective film, the thickness of the film is appropriate. Is 24 m or more, preferably 30 m or more.
- the thickness of the film described in the fourth aspect of the present invention is not particularly limited as long as it is within the range capable of forming a film, but is usually 50 to 300 ⁇ m, preferably 75 ⁇ m. ⁇ 250 ⁇ m.
- the film thickness is less than 50 ⁇ m, there is a tendency for the workability at the time of final inspection or sticking to the display to be performed for each sheet after punching into a sheet because there is no film waist, from 300 m If it is thick, workability may deteriorate due to its rigidity.
- the thickness of the layer containing titanium element and phosphorus element is preferably 0.5 m or more, more preferably 1 ⁇ m, and particularly preferably 2 ⁇ m or more.
- the layer containing titanium element and phosphorus element is at least the outermost layer, and there is a general layer on either one side, both outermost layers, or the inner layer. There are cases.
- the ability to specifically describe the method for producing a film of the present invention is not particularly limited to the following examples as long as the gist of the present invention is satisfied.
- the power for explaining a preferable example of the method for producing the polyester used in the present invention is not necessarily limited to this.
- polyethylene terephthalate is used as the polyester, but the production conditions differ depending on the polyester used.
- bis ⁇ -hydroxyethyl terephthalate ( ⁇ ) is obtained by esterification from terephthalic acid and ethylene glycol, or by transesterification of dimethyl terephthalate and ethylene glycol.
- ⁇ bis ⁇ -hydroxyethyl terephthalate
- the intrinsic viscosity of the polyester used in the present invention is usually 0.40 to 0.90, preferably 0.8.
- the range of 45 forces is 0.80, and more preferably 0.50-0.70. If the intrinsic viscosity is less than ⁇ 0.40, the mechanical strength of the film tends to be weakened. If the intrinsic viscosity exceeds 0.90, the melt viscosity becomes high, and the load force S is applied to the extruder. There may be a problem such as hang up.
- the polyester chip obtained as described above and dried by a known method is supplied to a melt extrusion apparatus and heated to a temperature equal to or higher than the melting point of each polymer to melt.
- the molten polymer is also extruded with a die force, and rapidly cooled and solidified on the rotary cooling drum so as to have a temperature lower than the glass transition temperature to obtain a substantially amorphous unoriented sheet.
- the adhesion between the sheet and the rotary cooling drum it is preferable to improve the adhesion between the sheet and the rotary cooling drum.
- the electrostatic application adhesion method and the Z or liquid application adhesion method are used.
- the sheet thus obtained is stretched biaxially to form a film.
- the unstretched sheet is preferably 70 to 70 in the machine direction. Stretched 2 to 6 times at 145 ° C to make a uniaxially stretched film, then stretched 2 to 6 times at 90 to 160 ° C in the transverse direction, and heat treated at 150 to 240 ° C for 1 to 600 seconds. Preferably it is done. Further, at this time, it is preferable to relax by 0.1 to 20% in the longitudinal direction and the Z or transverse direction in the maximum temperature zone of the heat treatment and the cooling zone at the heat treatment outlet or Z. Further, it is possible to add re-longitudinal stretching and re-lateral stretching as necessary. Furthermore, it is also possible to simultaneously biaxially stretch the unstretched sheet so that the area magnification is 10 to 40 times.
- a so-called in-line coating for treating the film surface during the stretching step can also be performed. Although it is not limited to the following, for example, after the first stage of stretching, before the second stage of stretching, improvement of antistatic property, slipperiness, adhesion, etc., secondary workability improvement, etc. For the purpose, it can be coated with an aqueous solution, aqueous emulsion, aqueous slurry or the like.
- the polyester film described in the fifth aspect of the present invention has characteristics required for its required characteristics such as antistatic properties, weather resistance, and surface as long as the effects of the present invention are not impaired.
- in-line coating may be performed in which coating is performed before the entrance of the transverse stretching tenter and drying in the tenter is performed after the longitudinal stretching is completed, if necessary.
- Various coatings may be performed by offline coating after film production. Such a coat may be single-sided or double-sided.
- the coating material may be either water-based and Z- or solvent-based for offline coating, but is preferably water-based or water-dispersed for in-line coating.
- the material constituting the release layer is not particularly limited as long as it has releasability.
- a type mainly composed of a curable silicone resin may be used, or a modified silicone type obtained by graft polymerization with an organic resin such as urethane resin, epoxy resin, alkyd resin, or the like may be used.
- the curable silicone resin is mainly used, the release property may be good.
- the types of curable silicone resin include solvent addition type 'solvent condensation type' solvent UV curing type, solventless addition type, solventless condensation type, solventless UV curing type, solventless electron beam curing type, etc. It can also be used in the curing reaction type.
- Examples 1 1 to 14 and Reference Examples 1 1 to 1 3 are the inventions described in the first gist of the present invention
- Examples 2-1 to 2-5 and Reference Examples 2-1 ⁇ 2-3 is the invention described in the second aspect of the present invention
- Examples 3-1 to 3-5 and Reference Examples 3-1 to 3-3 are the inventions described in the third aspect of the present invention.
- Examples 4 1 to 4 5 and Reference Examples 4 1 to 4 3 are the inventions described in the fourth gist of the present invention, Examples 5-1 to 5-4 and Reference Examples 5-1 to 5-3 Each explains the invention described in the fifth aspect of the present invention.
- “part” means “weight part”.
- the measuring method used in the present invention is as follows.
- the size of the particles was measured by a sedimentation method based on the resistance law of Stustus using a centrifugal sedimentation type particle size distribution analyzer SA-CP3 manufactured by Shimadzu Corporation.
- a predetermined amount of polyester layer is dissolved in a mixed solution of black mouth form Zl, 1, 1, 3, 3, 3 hexafluoro-2-propanol (mixing ratio: 3/2), and then black mouth form Z methanol (mixing ratio: 2Z1) and reprecipitated and filtered to remove linear polyethylene terephthalate, and then the solvent in the filtrate obtained was evaporated using an evaporator, and the resulting precipitate was added to a predetermined amount of DMF. Dissolved.
- the obtained DMF is supplied to liquid chromatography (Shimadzu LC-7A) to determine the amount of oligomer (cyclic trimer) contained in the polyester, and this value is divided by the amount of polyester used in the measurement to obtain a polyester film.
- the amount of oligomer (cyclic trimer) contained therein was defined.
- the amount of oligomer (cyclic trimer) determined by liquid chromatography was determined from the peak area ratio between the standard sample peak area and the measured sample peak area (absolute calibration curve method).
- the standard sample is prepared by weighing the pre-sorted oligomer (cyclic trimer), It was prepared by dissolving in a weighed DMF (dimethylformamide).
- the conditions for liquid chromatography were as follows.
- Methyl ethyl ketone is applied to the surface of the polyester film, dried in a hot air circulation oven at 120 ° C for 1 minute in a nitrogen atmosphere, and then this film is polyester film in a hot air circulation oven at 180 ° C in a nitrogen atmosphere. For 10 minutes. The surface of the polyester film after heat treatment was brought into contact with DMF for 3 minutes to dissolve the oligomer deposited on the surface.
- the method described in the elution apparatus used for the single-side elution method in the elution test can be adopted.
- the concentration of the DMF obtained in (2) by a method such as dilution, if necessary, and supply it to liquid chromatography (Shimadzu LC 7A) to determine the amount of oligomers in the DMF.
- the film surface oligomer amount (mgZm 2 ) was obtained by dividing by the film area.
- the amount of oligomer in DMF was determined from the peak area ratio of the standard sample peak area and the measurement sample peak area (absolute calibration curve method).
- the standard sample was prepared by weighing a pre-sorted oligomer (cyclic trimer) and dissolving it in a weighed DMF (dimethylformamide).
- the standard sample concentration is preferably in the range of 0.001-0. 0 lmgZml.
- the conditions of the liquid chromatograph were as follows.
- the amount of elements in the film was determined by single-film measurement using the film FP method under the conditions shown in Table 1 below. .
- the detection limit in this method is usually about 1 ppm.
- a sample is cut out from the position at each Omm and from both ends, and each is automatically manufactured by Oji Scientific Instruments.
- the birefringence meter (KOBRA-21ADH) was used to determine the change in orientation angle every 500 mm in the film width direction.
- the change in orientation angle is calculated every 500 mm by proportional calculation.
- a 3 m length is cut out, and the position force becomes the center with respect to the film width direction. Every 500 mm (including both ends) in the longitudinal direction, a sample is cut out from a total of 7 positions to determine the orientation angle. It was.
- the variation of the orientation angle every 500 mm in the width direction and the longitudinal direction was obtained, and the maximum variation value was defined as the variation of the orientation angle of the film. Further, in the measurement, it is important that the reference axis of the orientation angle is the same in all samples, and the reference axis can be arbitrarily determined.
- curable silicone resin (“KS-779H” manufactured by Shin-Etsu Chemical Co., Ltd.), 1 part of curing agent (“CAT- PL-8” manufactured by Shin-Etsu Chemical Co., Ltd.), methyl ethyl ketone (MEK) Z Toluene mixed solvent system 2200 parts of mold release agent was applied so that the coating amount was 0.1 lgZmm 2 and dried at 170 ° C for 10 seconds to obtain a release film
- the release film is in close contact with the polarizing film via an adhesive so that the width direction of the release film is parallel to the orientation axis of the polarizing film.
- the inspection polarizing plates are overlapped so that the axis is orthogonal to the film width direction, white light is irradiated from the polarizing plate side, and 10 inspectors visually observe each from the inspection polarizing plate,
- the visual inspection property under the test was evaluated according to the following criteria. In the measurement, A4 size samples were cut out from locations corresponding to positions of 10, 50, and 90% of the film width from the end of the obtained polyester film in the film width direction. did.
- those above ⁇ are the levels that can be used without problems in actual use.
- Curing type silicone resin (“KS-779HJ” manufactured by Shin-Etsu Chemical Co., Ltd.) 100 parts, curing agent (“CAT-PL-8” manufactured by Shin-Etsu Chemical) 1 part, methyl ethyl ketone (MEK) Z toluene mixed solvent system 2200 parts
- MEK methyl ethyl ketone
- Yo Apply a release agent to one side of the polyester so that the coating amount is 0.1 lgZmm 2 and dry at 170 ° C for 10 seconds to obtain a release film.
- a release film was adhered to the polarizing film through a known acrylic pressure-sensitive adhesive so that the width direction was parallel to the orientation axis of the polarizing film, thereby producing a polarizing plate with the release film.
- the polarizing plate when the polarizing plate was prepared, 50 metal powders (foreign matter) having a size of 50 m or more were mixed between the pressure-sensitive adhesive and the polarizing film so as to be Zm 2 .
- a polarizing plate for inspection is superimposed on the polarizing plate release film mixed with the foreign matter thus obtained so that the orientation axis is orthogonal to the width direction of the release film, and white light is irradiated from the polarizing plate side.
- the film was evaluated using a total of three films at the center and both ends of the obtained film, and the film with the result of the point with the best visual inspection was obtained.
- the foreign body was cognitive.
- tetrabutoxy titanate is added as a catalyst and placed in the reactor.
- the reaction start temperature is 150 ° C, and the reaction temperature is gradually increased as methanol is distilled off. The temperature was raised to 230 ° C after 3 hours. After 4 hours, the transesterification reaction was substantially terminated.
- This reaction mixture was transferred to a polycondensation tank, and an ethylene glycol slurry of silica particles having an average particle size of 2.5 ⁇ m was added so that the content of the particles with respect to the polyester would be 0.06 wt%, Condensation reaction was performed o
- the temperature was gradually raised from 230 ° C to 280 ° C.
- the pressure was gradually reduced from normal pressure, and finally it was set to 0.3 mmHg.
- the reaction was stopped at a time corresponding to an intrinsic viscosity of 0.55 due to a change in stirring power of the reaction tank, and the polymer was discharged under nitrogen pressure to obtain a polyester chip (AO).
- the intrinsic viscosity was 0.55.
- Polyester obtained was polymerized at 220 ° C under vacuum to obtain a polyester (A1) with an intrinsic viscosity of 0.65
- the pressure gradually decreased from the normal pressure, and was finally set to 0.3 mmHg.
- the reaction was stopped at a time corresponding to an intrinsic viscosity of 0.63 by changing the stirring power of the reaction tank, and the polymer was discharged under nitrogen pressure to obtain a chip of polyester (B1).
- the intrinsic viscosity of polyester (B1) is 0.63.
- Oligomer content in the resulting film 0.64 weight 0/0, antimony, titanium, phosphorus content, respectively Oppm (detection limit or lower), 5pp m, was 50 ppm.
- the oligomer amounts, antimony, titanium and phosphorus element contents in the films obtained in each Example and Reference Example, and evaluation results are summarized in Tables 6 and 7 below.
- Example 1-1 the polyester (AO) chip obtained was converted to a polyester having an intrinsic viscosity of 0.68 by changing the solid-phase polymerization time in the same manner as the polyester (A1) chip. Teru (A2) chip was obtained.
- Example 1 in place of the polyester (A1) chip used Instead, a polyester film was obtained in the same manner as in Example 1-1, except that a polyester (A2) chip was used.
- Example 1-1 only the polyester (A1) chip and the polyester (A1) chip and the polyester (B1) chip were blended at a ratio of 95 parts by weight and 5 parts by weight.
- a polyester film was obtained in the same manner as in Example 11 except that it was used.
- Example 1-3 a polyester film was obtained in the same manner as in Example 13 except that the polyester (A2) chip was used instead of the used polyester (A1) chip.
- a polyester (B2) chip having an intrinsic viscosity of 0.62 was obtained in the same manner as in Example 11 except that the amount of orthophosphoric acid was changed in the production of polyester (B1).
- a polyester (A2) chip and a polyester (B2) chip were used instead of the polyester (A1) chip and polyester (B1) chip used, and the same method as in Example 11 was used.
- a polyester film was obtained. In the obtained film, a foreign substance that was thought to be caused by the gelled product was generated, and the quality of the film was somewhat inferior, so that it could not be used for limited advanced applications.
- a polyester (A4) chip having an intrinsic viscosity of 0.56 was obtained in the same manner as in Example 1-1, except that the amount of tetrabutoxytitanate was changed in the production of polyester (AO).
- a polyester film was obtained in the same manner as in Example 11 except that polyester (A4) chips were used instead of the polyester (A1) chips used in Example 11.
- reaction start temperature 150 ° C.
- the reaction temperature was gradually increased as methanol was distilled off, and the temperature was raised to 230 ° C after 3 hours.
- the transesterification reaction was substantially terminated. After adding ethyl chloride phosphate to this reaction mixture, it is transferred to a polycondensation tank, and an ethylene glycol slurry of silica particles having an average particle size of 2.5 m is 0.06% by weight based on the polyester content. Then, the polycondensation reaction was carried out for 4 hours. In other words, the temperature was gradually increased by 230 ° C to 280 ° C. On the other hand, the pressure was gradually reduced from the normal pressure, and finally 0.3 mmHg.
- the reaction was stopped at a time corresponding to an intrinsic viscosity of 0.63 due to a change in the stirring power of the reaction vessel, and the polymer was discharged under nitrogen pressure to obtain a polyester chip.
- the intrinsic viscosity of this polyester was 0.63.
- the obtained polyester chip was subjected to solid phase polymerization at 220 ° C. under vacuum to obtain a polyester (C) having an intrinsic viscosity of 0.67.
- Polyester (C) was melt-extruded at 290 ° C by a twin screw extruder with a vent, and cooled and solidified on a cooling roll having a surface temperature set to 40 ° C using an electrostatic application adhesion method. An unstretched sheet was obtained. Next, the film was stretched 3.7 times in the longitudinal direction at 83 ° C, then led to a tenter, stretched 3.9 times in the transverse direction at 110 ° C, and further heat-treated at 220 ° C, with a thickness of 25 / zm. Polyeste Norefinolem was obtained.
- Reference example 1 2 5. 33 6. 97
- the oligomer amounts, antimony, titanium, phosphorus element contents and evaluation results in the films obtained in each Example and Comparative Example are shown in Tables 8 and 9 below.
- Example 2-1 the polyester (A2) chip having an intrinsic viscosity of 0.67 was obtained by changing the solid-state polymerization time for the obtained polyester (AO) chip in the same manner as the polyester (A1) chip.
- AO solid-state polymerization time for the obtained polyester (AO) chip in the same manner as the polyester (A1) chip.
- a polyester film was obtained in the same manner as in Example 2-1, except that a polyester (A2) chip was used instead of the polyester (A1) chip used.
- Example 2—3 In Example 2-1, the polyester (AO) chip obtained was converted to a polyester (A3) having an intrinsic viscosity of 0.68 by changing the solid-phase polymerization time in the same manner as the polyester (A1) chip. ) I got a chip.
- a polyester film was obtained in the same manner as in Example 2-1, except that a polyester (A3) chip was used instead of the polyester (A1) chip used.
- Example 2-1 only the polyester (A1) chip and the polyester (B1) chip used were blended at a ratio of 95 parts by weight and 5 parts by weight.
- a polyester film was obtained in the same manner as in Example 2-1, except that it was used.
- Example 2-4 a polyester film was obtained in the same manner as in Example 2-4, except that a polyester (A2) chip was used instead of the used polyester (A1) chip.
- polyester (B1) a polyester (B2) chip having an intrinsic viscosity of 0.62 was obtained in the same manner as in the production method except that the addition amount of orthophosphoric acid was changed.
- Example 2-1 is the same as Example 2-1 except that a polyester (A2) chip and a polyester (B2) chip are used in place of the polyester (A1) chip and the polyester (B1) chip used.
- a polyester film was obtained in the same manner. In the obtained film, a foreign substance that was thought to be caused by the gelled product was generated, and the quality of the film was somewhat inferior, so that it could not be used for limited advanced applications.
- a polyester (A4) chip having an intrinsic viscosity of 0.56 was obtained in the same manner as in the production method except that the amount of tetrabutoxy titanate was changed in the production of the polyester (AO).
- Example 2-1 a polyester film was prepared in the same manner as in Example 2-1, except that a polyester (A4) chip was used instead of the used polyester (A1) chip.
- the temperature was gradually increased by 230 ° C to 280 ° C.
- the pressure was gradually reduced from the normal pressure, and finally 0.3 mmHg.
- the reaction was stopped at a time corresponding to an intrinsic viscosity of 0.63 due to a change in the stirring power of the reaction vessel, and the polymer was discharged under nitrogen pressure to obtain a polyester chip.
- the intrinsic viscosity of this polyester was 0.63.
- the obtained polyester chip was subjected to solid phase polymerization at 220 ° C. under vacuum to obtain a polyester (C) having an intrinsic viscosity of 0.67.
- Polyester was melt-extruded at 290 ° C using a vented twin-screw extruder, cooled and solidified on a cooling roll set at a surface temperature of 40 ° C using an electrostatic application adhesion method. A stretched sheet was obtained. Next, the film was stretched 3.7 times in the longitudinal direction at 83 ° C, then led to a tenter, stretched 3.9 times in the transverse direction at 110 ° C, and further heat treated at 220 ° C to obtain a 25 m thick polyester. Le film was obtained.
- Example 2-1 64 0 5 50
- the film was stretched 3.7 times in the longitudinal direction at 83 ° C, led to a tenter, stretched 3.9 times in the transverse direction at 110 ° C, and further heat treated at 220 ° C to obtain a thickness of 38 m polyester film was obtained.
- Oligomer content in the resulting film 0.64 weight 0/0, antimony, titanium, phosphorus content, respectively Oppm (detection limit or lower), 5pp m, was 50 ppm.
- the oligomer amounts, antimony, titanium and phosphorus element contents in the films obtained in each Example and Comparative Example, and evaluation results are summarized in Tables 10 and 11 below.
- Example 3-1 the obtained polyester (AO) chip was changed to a polyester (A2) having an intrinsic viscosity of 0.67 by changing the time of solid phase polymerization in the same manner as the polyester (A1) chip. ) I got a chip.
- a polyester film was obtained in the same manner as in Example 3-1, except that a polyester (A2) chip was used instead of the polyester (A1) chip used in Example 3-1.
- Example 3-1 the polyester (AO) chip obtained was converted to a polyester (A3) having an intrinsic viscosity of 0.68 by changing the time of solid phase polymerization in the same manner as the polyester (A1) chip. ) I got a chip.
- a polyester film was obtained in the same manner as in Example 3-1, except that a polyester (A3) chip was used instead of the polyester (A1) chip used.
- Example 3-1 only the polyester (A1) chip and the polyester (B1) chip used were blended at a ratio of 95 parts by weight and 5 parts by weight.
- a polyester film was obtained in the same manner as in Example 3-1, except that it was used.
- Example 3-4 a polyester film was obtained in the same manner as in Example 3-4, except that a polyester (A2) chip was used instead of the used polyester (A1) chip.
- polyester (B1) In the production of polyester (B1), except that the addition amount of orthophosphoric acid was changed A polyester (B2) chip having an intrinsic viscosity of 0.62 was obtained in the same manner as described above.
- Example 3-1 is the same as Example 3-1 except that a polyester (A2) chip and a polyester (B2) chip are used instead of the polyester (A1) chip and the polyester (B1) chip used.
- a polyester film was obtained in the same manner. In the obtained film, a foreign substance that was thought to be caused by the gelled product was generated, and the quality of the film was somewhat inferior, so that it could not be used for limited advanced applications.
- a polyester (A4) chip having an intrinsic viscosity of 0.56 was obtained in the same manner as in the production method except that the amount of tetrabutoxy titanate was changed in the production of the polyester (AO).
- a polyester film was obtained in the same manner as in Example 3-1, except that a polyester (A4) chip was used instead of the polyester (A1) chip used in Example 3-1.
- the temperature was gradually increased by 230 ° C to 280 ° C.
- the pressure was gradually reduced from the normal pressure, and finally 0.3 mmHg.
- the reaction was stopped at a time corresponding to an intrinsic viscosity of 0.63 due to a change in the stirring power of the reaction vessel, and the polymer was discharged under nitrogen pressure to obtain a polyester chip.
- the intrinsic viscosity of this polyester was 0.63.
- the obtained polyester chip was subjected to solid phase polymerization at 220 ° C. under vacuum to obtain a polyester (C) having an intrinsic viscosity of 0.67.
- Polyester was melt-extruded at 290 ° C using a vented twin-screw extruder, and cooled and solidified on a cooling roll set at a surface temperature of 40 ° C using an electrostatic application adhesion method. Stretching A sheet was obtained. Next, the film was stretched 3.7 times in the longitudinal direction at 83 ° C, then led to a tenter, stretched 3.9 times in the transverse direction at 110 ° C, and further heat-treated at 220 ° C, with a thickness of 38 / m. A polyester film was obtained.
- Oligomer content in the resulting film 0.64 weight 0/0, antimony, titanium, phosphorus content, respectively Oppm (detection limit or lower), 5pp m, was 50 ppm.
- the oligomer amounts, antimony, titanium and phosphorus element contents in the films obtained in each Example and Comparative Example, and evaluation results are summarized in Tables 12 and 13 below.
- Example 4-1 the obtained polyester (AO) chip was changed to a polyester (A2) having an intrinsic viscosity of 0.67 by changing the solid-phase polymerization time in the same manner as the polyester (A1) chip. ) I got a chip.
- a polyester film was obtained in the same manner as in Example 4-1, except that a polyester (A2) chip was used instead of the polyester (A1) chip used.
- Example 4-1 the obtained polyester (AO) chip was changed in the same manner as the polyester (A1) chip by changing the time of solid-phase polymerization, so that the polyester (A3 ) I got a chip.
- Example 4-1 a polyester film was obtained in the same manner as in Example 4-1, except that a polyester (A3) chip was used instead of the polyester (A1) chip used.
- Example 4-1 only the polyester (A1) chip and the polyester (B1) chip used were blended at a ratio of 95 parts by weight and 5 parts by weight.
- a polyester film was obtained in the same manner as in Example 41 except that it was used.
- polyester (A2) A polyester film was obtained in the same manner as in Example 4-4 except that the chip was used.
- polyester (B1) a polyester (B2) chip having an intrinsic viscosity of 0.62 was obtained in the same manner as in the production method except that the addition amount of orthophosphoric acid was changed.
- Example 4-1 is the same as Example 4-1 except that a polyester (A2) chip and a polyester (B2) chip are used in place of the polyester (A1) chip and the polyester (B1) chip used.
- a polyester film was obtained in the same manner. In the obtained film, a foreign substance that was thought to be caused by the gelled product was generated, and the quality of the film was somewhat inferior, so that it could not be used for limited advanced applications.
- a polyester (A4) chip having an intrinsic viscosity of 0.56 was obtained in the same manner as in the production method except that the amount of tetrabutoxy titanate was changed in the production of the polyester (AO).
- a polyester film was obtained in the same manner as in Example 41 except that the polyester (A4) chip was used instead of the polyester (A1) chip used in Example 41.
- the temperature was gradually increased by 230 ° C to 280 ° C.
- the pressure was gradually reduced from the normal pressure, and finally 0.3 mmHg.
- the reaction was stopped at a time corresponding to an intrinsic viscosity of 0.63 due to a change in the stirring power of the reaction vessel, and the polymer was discharged under nitrogen pressure to obtain a polyester chip.
- the intrinsic viscosity of this polyester was 0.63. Obtained
- the polyester chip was subjected to solid state polymerization at 220 ° C. under vacuum to obtain polyester (C) having an intrinsic viscosity of 0.67.
- Polyester (C) was melt-extruded at 290 ° C using a twin screw extruder with a vent, and cooled and solidified on a cooling roll set to a surface temperature of 40 ° C using an electrostatic application adhesion method. An unstretched sheet was obtained. Next, the film was stretched 3.7 times in the machine direction at 83 ° C, then led to a tenter, stretched 3.9 times in the transverse direction at 110 ° C, and further heat treated at 220 ° C to obtain a 125 m thick polyester. Le film was obtained.
- Oligomer content in the resulting film 0.64 weight 0/0, antimony, titanium, Li down elemental content (detection limit or lower), respectively Oppm, 5 ppm, was 50 ppm.
- the information on the films obtained in each Example and Comparative Example is shown in Table 14 and Table 15 below.
- Example 5-1 the polyester (AO) chip obtained was converted to a polyester (A2) having an intrinsic viscosity of 0.64 by changing the solid-state polymerization time in the same manner as the polyester (A1) chip. ) I got a chip.
- Example 5-1 a polyester film was obtained in the same manner as in Example 5-1, except that a polyester (A2) chip was used instead of the polyester (A1) chip used. [0125]
- Example 5-3 Example 5-3:
- Example 5-1 the polyester (AO) chip obtained was treated in the same manner as the polyester (A1) chip by changing the time of solid-phase polymerization, so that the polyester (A3 ) I got a chip.
- Example 5-1 a polyester film was obtained in the same manner as in Example 5-1, except that a polyester (A3) chip was used instead of the polyester (A1) chip used.
- Example 5-1 only the polyester (A2) chip and the polyester (A1) chip and the polyester (B1) chip were blended at a ratio of 95 parts by weight and 5 parts by weight.
- a polyester film was obtained in the same manner as in Example 5-1, except that it was used.
- polyester (B1) a polyester (B2) chip having an intrinsic viscosity of 0.62 was obtained in the same manner as in the production method except that the addition amount of orthophosphoric acid was changed.
- Polyester (A2) chips and polyester (B2) chips were blended at a ratio of 95 parts by weight and 5 parts by weight, respectively, and melt-extruded at 290 ° C by a twin-screw extruder with a vent.
- An unstretched sheet was obtained by cooling and solidifying on a cooling roll having a surface temperature set to 40 ° C. by using an electric application adhesion method.
- the film was stretched 3.3 times in the machine direction at 90 ° C, led to a tenter, stretched 4.2 times in the transverse direction at 130 ° C, further heat treated at 220 ° C, and then heated at 180 ° C.
- a polyester (A4) chip having an intrinsic viscosity of 0.56 was obtained in the same manner as in the production method except that the amount of tetrabutoxy titanate was changed in the production of the polyester (AO).
- the polyester (A4) chip and the polyester (B1) chip were used in place of the polyester (A2) chip and the polyester (B2) chip used.
- a polyester film was obtained in the same manner as in Reference Example 5-1.
- Example 1 the temperature was gradually increased by 230 ° C to 280 ° C.
- the pressure was gradually reduced from the normal pressure, and finally 0.3 mmHg.
- the reaction was stopped at a time corresponding to an intrinsic viscosity of 0.63 due to a change in the stirring power of the reaction tank, and the polymer was discharged under nitrogen pressure to obtain a polyester chip (CO).
- the intrinsic viscosity of this polyester was 0.63.
- Example 1 only the polyester (CO) chip was used instead of the raw material in which the polyester (A1) chip and the polyester (B1) chip used were blended at a ratio of 95 parts by weight and 5 parts by weight.
- a polyester film was obtained in the same manner as in Example 1 except for the above.
- polyester (CO) obtained in Reference Example 5-3 was subjected to solid phase polymerization at 220 ° C under vacuum to obtain polyester (C1) having an ultimate viscosity of 0.85.
- polyester (A1) chip and the polyester (B1) chip used were blended at a ratio of 95 parts by weight and 5 parts by weight, only the polyester (C1) chip was used.
- the force to obtain a polyester film in the same manner as in Example 5-1.
- the filter pressure increased at the time of melt extrusion, and the extruder was overloaded, resulting in a force that could not be formed into a film.
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CNA2005800286915A CN101014640A (zh) | 2004-08-30 | 2005-08-30 | 脱模用聚酯薄膜 |
KR1020077004179A KR101293098B1 (ko) | 2004-08-30 | 2005-08-30 | 이형용 폴리에스테르 필름 |
EP05776807A EP1785443A4 (en) | 2004-08-30 | 2005-08-30 | POLYESTER FILMS FOR AUTHORIZATION |
US11/661,112 US20070298243A1 (en) | 2004-08-30 | 2005-08-30 | Polyester Film |
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JP2004249448A JP2006062273A (ja) | 2004-08-30 | 2004-08-30 | 離型用ポリエテルフィルム |
JP2004-249448 | 2004-08-30 | ||
JP2004263446A JP2006077148A (ja) | 2004-09-10 | 2004-09-10 | 光学フィルム用ポリエテルフィルム |
JP2004-263446 | 2004-09-10 | ||
JP2004-263445 | 2004-09-10 | ||
JP2004263444A JP2006077146A (ja) | 2004-09-10 | 2004-09-10 | 液晶表示板保護離型用ポリエテルフィルム |
JP2004-263444 | 2004-09-10 | ||
JP2004263445A JP2006077147A (ja) | 2004-09-10 | 2004-09-10 | 保護フィルム用ポリエテルフィルム |
JP2004-369007 | 2004-12-21 | ||
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WO2008032428A1 (fr) * | 2006-09-11 | 2008-03-20 | Mitsubishi Polyester Film Corporation | Film de polyester pour pellicule anti-adhésive |
MY195236A (en) * | 2008-01-11 | 2023-01-11 | Toyo Boseki | Mould Release Film |
KR20120135206A (ko) * | 2010-01-13 | 2012-12-12 | 미츠비시 폴리에스테르 필름 인코포레이티드 | 폐필름의 재활용 방법 및 그로부터 제조된 제품 |
JP5616657B2 (ja) * | 2010-03-12 | 2014-10-29 | 富士フイルム株式会社 | 表面処理方法 |
US9175183B2 (en) * | 2011-05-23 | 2015-11-03 | Carestream Health, Inc. | Transparent conductive films, methods, and articles |
JP5808971B2 (ja) * | 2011-07-22 | 2015-11-10 | 株式会社Adeka | 水系ポリウレタン樹脂組成物、これを塗布してなる易接着性ポリエステルフィルム |
CN105008130B (zh) * | 2013-04-06 | 2018-03-16 | 三菱化学株式会社 | 涂布膜 |
JP7254514B6 (ja) * | 2015-11-27 | 2023-04-21 | エスケイシー・カンパニー・リミテッド | 偏光子用保護フィルム、偏光板、およびそれらを含む表示装置 |
WO2018066618A1 (ja) * | 2016-10-05 | 2018-04-12 | 三菱ケミカル株式会社 | 積層ポリエステルフィルム |
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JPH08188704A (ja) * | 1995-01-10 | 1996-07-23 | Teijin Ltd | ポリエステル組成物 |
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US3907754A (en) * | 1974-06-19 | 1975-09-23 | Eastman Kodak Co | Process and catalyst-inhibitor system for preparing synthetic linear polyester |
US3962189A (en) * | 1974-11-01 | 1976-06-08 | Eastman Kodak Company | Process and catalyst-inhibitor systems for preparing synthetic linear polyesters |
US4010145A (en) * | 1975-05-12 | 1977-03-01 | Eastman Kodak Company | Process and catalyst inhibitor systems for preparing synthetic linear polyesters |
JPH064276B2 (ja) * | 1985-12-10 | 1994-01-19 | ダイアホイルヘキスト株式会社 | メンブレンスイツチ用ポリエステルフイルム |
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2005
- 2005-08-30 KR KR1020077004179A patent/KR101293098B1/ko active IP Right Grant
- 2005-08-30 EP EP05776807A patent/EP1785443A4/en not_active Withdrawn
- 2005-08-30 CN CNA2005800286915A patent/CN101014640A/zh active Pending
- 2005-08-30 US US11/661,112 patent/US20070298243A1/en not_active Abandoned
- 2005-08-30 WO PCT/JP2005/015692 patent/WO2006025344A1/ja active Application Filing
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Title |
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See also references of EP1785443A4 * |
Also Published As
Publication number | Publication date |
---|---|
KR20070046133A (ko) | 2007-05-02 |
KR101293098B1 (ko) | 2013-08-12 |
EP1785443A1 (en) | 2007-05-16 |
EP1785443A4 (en) | 2008-10-29 |
CN101014640A (zh) | 2007-08-08 |
US20070298243A1 (en) | 2007-12-27 |
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