WO2005056291A1 - 離型フィルム用ポリエステルフィルム - Google Patents
離型フィルム用ポリエステルフィルム Download PDFInfo
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- WO2005056291A1 WO2005056291A1 PCT/JP2004/017377 JP2004017377W WO2005056291A1 WO 2005056291 A1 WO2005056291 A1 WO 2005056291A1 JP 2004017377 W JP2004017377 W JP 2004017377W WO 2005056291 A1 WO2005056291 A1 WO 2005056291A1
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- Prior art keywords
- film
- polyester
- polyester film
- polarizing plate
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/044—Forming conductive coatings; Forming coatings having anti-static properties
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
- C09J7/405—Adhesives in the form of films or foils characterised by release liners characterised by the substrate of the release liner
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/244—All polymers belonging to those covered by group B32B27/36
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/42—Polarizing, birefringent, filtering
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/712—Weather resistant
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/748—Releasability
-
- 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
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
-
- 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
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
- B32B2457/202—LCD, i.e. liquid crystal displays
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
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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
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31786—Of polyester [e.g., alkyd, etc.]
Definitions
- the present invention relates to a polyester film having excellent optical properties, which is an important property in films for liquid crystal display and the like, and is particularly suitably used as a release film for a polarizing plate or a polarizing plate protective film. It relates to a polyester film.
- LCDs liquid crystal displays
- LCDs LCDs
- LCDs have been used for large monitors of 17 inches or more and large TVs.
- LCDs with large screens often have large screens and bright LCDs by increasing the brightness of the backlight incorporated in the LCD or by incorporating a film that improves the brightness in the liquid crystal unit. No.
- a defect inspection of a polarizing plate a visual inspection by a cross-col method is generally used, and a crossing Nicol method is used for a polarizing plate or the like used for a large TV of 30 inches or more, for example. Inspection by automatic foreign matter inspection equipment is also being implemented.
- the cross-col method is a method in which two polarizing plates are set in an extinction state with their main axes of orientation orthogonal to each other, and if there is a foreign substance or a defect, it appears as a bright spot, so that defect inspection can be performed.
- the polarizing plate A polyester film with a release layer provided via an adhesive layer is used.Cross-col inspection is performed with the release polyester film sandwiched between two polarizing plates. If a polyester film is used for this, it may hinder the inspection by the cross Nicol method, and may cause a problem that foreign substances are easily mixed or defects are easily overlooked. Also, if there is a foreign substance or defect in the polyester film, it may not be possible to determine whether the polarizing plate is defective or not, and the polarizing plate may be rejected. This can cause problems.
- the polyester oligomer present in the polyester film is transferred to the pressure-sensitive adhesive layer, and after a lapse of time, a bright spot is generated in the pressure-sensitive adhesive layer. This can be a problem.
- Patent Document 1 JP-A-2000-141570
- Patent Document 2 JP-A-2000-335649
- Patent Document 3 JP-A No. 12-289168
- the present invention is intended to solve such a problem, and an object of the present invention is to make it possible to carry out an accurate inspection in an inspection of a polarizing plate by a cross-col method, and to provide an adhesive layer.
- An object of the present invention is to provide a polyester film for a release film, which suppresses the polyester oligomer transfer.
- the gist of the present invention is that a polyester film has a coating layer with 50 defects and Zm 2 or less on at least one surface, and is extracted from the surface of the coating layer after a heat treatment at 150 ° C for 10 minutes.
- a polyester film for a release film wherein the amount of the polyester oligomer to be used is 0.3 mgZm 2 or less, and the inclination (orientation angle) of the main axis of the film is 8 degrees or less, and the release layer is formed on the film.
- a release film for a polarizing plate separator characterized by having: and a polyester film for a polarizing plate protective film characterized by comprising the film.
- a polyester film for a release film capable of performing an accurate inspection in an inspection of a polarizing plate by a cross-col method.
- the polyester in the present invention refers to a polymer containing an ester group obtained by polycondensation of a dicarboxylic acid, a diol and a force or a hydroxycarboxylic acid.
- Dicarboxylic acids include terephthalic acid, succinic acid, isophthalic acid, adipic acid, azelaic acid, sebacic acid, dodecanedioic acid, 2,6-naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, and diols.
- Ethylene glycol 1,3 propanediol, 1,6 monohexanediol, 1,4 butanediol, diethylene glycol, triethylene glycol, neopentyl glycol, 1,4-cyclohexanedimethanol, polyethylene glycol, etc.
- hydroxycarboxylic acid include p-hydroxybenzoic acid and 6-hydroxy-2 naphthoic acid.
- Typical examples of powerful polymers include polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, and polyethylene 2,6-naphthalate. These polymers may be homopolymers or copolymers of the third component.
- the film of the present invention is preferably a biaxially oriented polyester film from the viewpoint of excellent strength and dimensional stability. A biaxially stretched film is preferably used. Unstretched or at least one stretched polyester film can be used without departing from the gist of the invention.
- the inclination (orientation angle) of the main orientation axis is 8 degrees or less. If the orientation angle exceeds 8 degrees, the intensity of light leaking from the polarizing plate when inspecting the polarizing plate is increased, which is undesired because it hinders inspection of foreign substances on the polarizing plate.
- the amount of the oligomer to be extracted from the surface of the coat layer of the film after the heat treatment at 150 ° C for 10 minutes needs to be 0.3 mgZm 2 or less, and preferably 0.2 mgZm 2 or less. If the amount of oligomer is more than 0. 3 mg / m 2 is Te step Nio ⁇ placing the adhesive material in manufacturing the release film using a force mowing film, oligomer metastasis, aggregate in the pressure-sensitive material It is not preferable because it may cause foreign matters.
- the defect of the coat layer on the polyester film surface needs to be 50 Zm 2 or less, preferably 20 Zm 2 or less, more preferably 10 Zm 2 or less.
- the polyester oligomer is more intensively precipitated than the defective portion, and the transfer to the adhesive layer may occur, which is not preferable.
- the heat shrinkage at 150 ° C. for 30 minutes is 5% or less, and the strength (F5) when the film is stretched by 5% is 100 MPa or more. If the force is out of the range, the flatness may be impaired in the step of applying and drying the release layer or the step of applying the adhesive on the release film, and the adhesive on the release film may be damaged. In some cases, resulting in a defective polarizing plate, which is not preferable.
- the number of foreign substances having a maximum diameter of 150 m or more present in the film is 0 / m 2
- the number of foreign substances having a maximum diameter of 30 m or more is 1.5 / m 2 or less. More preferably, the number of foreign substances having a maximum diameter of 30 m or more is 1 particle / m 2 or less.
- the foreign matter in the polyester film becomes bright spot during the test In many cases, it is not possible to determine that the polarizing plate is defective, which is undesirable because the polarizing plate itself may be regarded as defective.
- the film haze is preferably 6% or less, and the film haze is more than 6%. In some cases, the bright spot of the defective part may be found.
- the number of scratches having a width of 10 ⁇ m or more present on the film surface is preferably 20 Zm 2 or less, and more preferably 10 / m 2 or less. If the number of scratches having a width 10 / zm is more than 20 / m 2, if the locations of the flaws on the film surface during the black Sunikoru inspection becomes bright point or, in the case of performing visual inspection of the polarizing plates, and the like by the reflected light In some cases, it is recognized as a bright spot, and a polarizing plate or the like is regarded as defective.
- the b value measured by transmitted light using a color difference meter is preferably in the range of -2.0-2.0. If the b value is out of this range, the color of the end face of the release film roll provided with a release layer on the polyester film may be extremely yellow or blue, which is a practical problem. May occur.
- a filler is preferably added to the film to improve the slipperiness of the film.
- Inorganic particles such as calcium carbonate, kaolin, titanium oxide, aluminum oxide, sodium sulfate, zeolite and the like, or organic particles such as silicone resin, cross-linked polystyrene, acrylic resin and the like are blended in the film alone or as a mixture. It is mentioned.
- the average particle size, the added amount, and the particle size distribution of the particles used are not particularly limited as long as the effects of the present invention are not impaired, but the average particle size is 0.1 to 4.
- ⁇ m the amount of added calories is preferably 0.01 to 3.0% by weight.
- a polyester film having a small amount of foreign matter is prepared by blending calcium carbonate particles in the film with an added caloric content of 0.03% by weight or more based on the polyester. Can be preferred.
- the polyester film of the present invention may be a single-layer film or a multilayer film in which a plurality of layers are laminated, as long as the effects of the present invention are not impaired. It is preferable that the film is composed of three layers or three layers!
- the present invention is not particularly limited to the following examples as long as it satisfies the essentials of the present invention.
- the polyester chips dried by a known method are supplied to a melt extruder, and are heated and melted at a temperature not lower than the melting point of each polymer. The molten polymer is then The squid is extruded and quenched and solidified on a rotary cooling drum to a temperature below the glass transition temperature to obtain a substantially amorphous unoriented sheet. In this case, in order to improve the flatness of the sheet, it is preferable to increase the adhesion between the sheet and the rotary cooling drum. In the present invention, the electrostatic application adhesion method and the Z or liquid application adhesion method are preferably employed. .
- the sheet thus obtained is stretched biaxially to form a film.
- the stretching conditions are as follows: the unstretched sheet is stretched preferably 1.3 to 6 times at 80 to 130 ° C. in the machine direction to form a uniaxially stretched film, and then 90 to 90 times in the transverse direction. It is preferred that the film be stretched 1.3 to 6 times at 160 ° C and heat-treated at 150 to 240 ° C for 1 to 600 seconds. Further, at this time, it is preferable to relax by 0.1 to 20% in the vertical direction and the Z direction or the horizontal direction in the maximum temperature zone of the heat treatment and the cooling zone at the Z or the cooling treatment outlet.
- the longitudinal stretching ratio should be 2.6 times or more and 3.1 times or less. Is preferably 5.0 times or more, and the heat treatment temperature (main crystal temperature) is 185 ° C. or more.
- a stretching method using a simultaneous biaxial stretching method which may be a sequential biaxial stretching or a simultaneous biaxial stretching, is preferable in that the fluctuation of the orientation angle can be reduced.
- the simultaneous biaxial stretching method the unstretched sheet is subjected to temperature control at usually 70 to 120 ° C, preferably 80 to 110 ° C, in the machine direction (or machine direction) and the transverse direction (or width direction). )), The film is simultaneously stretched and oriented, and the stretching ratio is 4 to 50 times, preferably 7 to 35 times, and more preferably 10 to 25 times in area ratio.
- the “screw method” is a method in which a clip is placed in a groove of a screw to increase a clip interval.
- the “pantograph method” is a method in which the clip interval is widened using a pantograph.
- the “linear motor method” has the advantage that the clip interval can be adjusted arbitrarily by applying the linear motor principle and controlling the clips individually. More In the case of simultaneous biaxial stretching, the stretching may be performed in two or more steps. In this case, the stretching may be performed in one tenter, or a plurality of tenters may be used together!
- the coat layer for suppressing the amount of the polyester oligomer deposited on the film surface is not particularly limited as long as it does not exceed the gist of the present invention. -90% by weight, more preferably 30-90% by weight.
- Polyvinyl alcohol can be synthesized by a usual polymerization reaction, and is preferably water-soluble.
- the polymerization degree of the polybutyl alcohol is not particularly limited. A force of usually 100 or more, preferably 300 to 40,000 is used. When the degree of polymerization is 100 or less, the water resistance of the coating layer tends to decrease.
- the saponification degree of the polybutyl alcohol is not particularly limited, but a saponified polyacetate having a mole percentage of usually 70 mol% or more, preferably 80 mol% or more and 99.9 mol% or less is practically used. Further, one or more water-soluble or water-dispersible binder resins other than those described above can be used in the coating layer, if necessary.
- Examples of the strong binder resin include polyester, polyurethane, acrylic resin, bullet resin, epoxy resin, amide resin and the like. Each of these may have a substantially composite structure in which each skeletal structure is copolymerized.
- Examples of the binder resin having a composite structure include acrylic resin-grafted polyester, acrylic resin-grafted polyurethane, vinyl resin-grafted polyester, and vinyl resin-grafted polyurethane.
- a crosslinking reactive compound may be contained.
- the crosslinking reactive compound can improve the cohesion, surface hardness, scratch resistance, solvent resistance, and water resistance of the coating layer by mainly performing a cross-linking reaction with the functional group contained in the coating layer component.
- the coating layer of the film of the present invention comprises a surfactant, an antifoaming agent, a coating improver, a thickener, an antistatic agent, an organic lubricant, organic particles, inorganic particles, an antioxidant, an ultraviolet absorber, It may contain additives such as a foaming agent, a dye, and a pigment. These additives may be used alone or in combination of two or more as necessary. In particular, it is preferable to use an antifoaming agent or a surfactant for the purpose of suppressing coat defects due to fine bubbles during coating.
- the method of setting the oligomer prevention layer is such that an off-line A coat may be used, but an in-line coat is desirable in terms of economy.
- examples of the in-line coating include a method in which after the longitudinal stretching is completed, a coat is applied before the entrance of the tenter for the transverse stretching and then dried in the tenter.
- the polyester film of the present invention does not impair the effects of the present invention! If it is within the range, necessary properties according to the required properties, such as antistatic property and weather resistance, can be obtained by in-line coating and off-line coating. You may give.
- polyester film of the present invention does not impair the effects of the present invention! If it is within the range, other thermoplastic resins such as polyethylene naphthalate and polytrimethylene terephthalate are mixed. You can do it. Further, an ultraviolet absorber, an antioxidant, a surfactant, a pigment, a fluorescent whitening agent and the like can be mixed. Particularly, the addition of an antioxidant is preferred.
- the material constituting the release layer is not particularly limited as long as it has release properties, and is mainly composed of a curable silicone resin. Or a modified silicone type obtained by graft polymerization with an organic resin such as urethane resin, epoxy resin, or alkyd resin. Among them, when the curable silicone resin is used as a main component, the releasability is good.
- curable silicone resins include solvent addition type, solvent condensation type, solvent ultraviolet curing type, solventless addition type, solventless condensation type, solventless ultraviolet curing type, solventless electron beam curing type, etc. , Can also be used in the curing reaction type.
- a polyester film was cut into 25 cm square pieces and heated for 10 minutes in an oven (hot-air circulating furnace manufactured by Tabai Seisakusho) set at 150 ° C, then the top was opened and the area of the bottom was 250 cm 2 Fold the heat-treated polyester film to make a square box.
- the coating layer surface is on the inside.
- the recovered DMF was supplied to the liquid chromatography (Shimadzu LC 7A) determined oligo mer content in the DMF, the value, divided by the film area contacting the DMF, the film surface O oligomer amount and (mgZm 2) I do.
- the oligomer amount in DMF 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 was prepared by accurately weighing a preliminarily collected oligomer (cyclic trimer) and dissolving it in the accurately weighed DMF.
- the concentration of the standard sample is preferably in the range of 0.001 to 0.1 OlmgZml.
- the conditions of the liquid chromatography were as follows.
- a three-wavelength light-emitting neutral white light with a color temperature of 7100K is incident on the coating layer on the film surface at an incident angle of 45 degrees, and the coating defect is visually detected from the position where the reflection is 45 degrees.
- This defect inspection was performed on an area of 10 m 2 , and the number of coat defects was calculated.
- a strip film of 50 mm in length and 15 mm in width was cut out from the same place as the measurement of the heat shrinkage, and a tensile tester, Intesco Model 2001, manufactured by Intesco Corporation, was used at a temperature of 23 ° C and a humidity of 50%. In a room adjusted to RH, it was pulled at a speed of 50 mmZmin, and the strength at 5% elongation was determined as the F5 value.
- a polyester film having a width of 700 mm and a length of 10 m (area 7 m 2 ) was visually inspected for foreign substances using the cross-col method, and the size of all detected foreign substances was measured using an optical microscope. After counting the number of foreign substances having a size of ⁇ m or more and the number of foreign substances having a major axis having a size of 30 ⁇ m or more, they were converted per unit area. In the following examples, the foreign substance inspection was performed using a long sample. However, the number of foreign substances can be measured using a similar method even for a small sample such as an A4 size sample.
- the haze of the film was measured using a spectroscopic turbidimeter NDH-20D manufactured by Nippon Denshoku Industries Co., Ltd.
- a film with a width of 1500 mm and a length of 10 m (area 15 m 2 ) is exposed to light with a halogen light, the film surface is visually observed, and the number of scratches appearing as bright spots is counted.
- the width of the flaw was measured with an optical microscope, and the number of flaws having a width of 10 m or more was calculated.
- the number of scratches having a width of 10 ⁇ m or more was counted for a long sample.For example, even for a film having a size of about A4 size, a scratch having a width of 10 ⁇ m or more was obtained in the same manner as described above. It is possible to measure the number.
- the b value was measured by the transmission method according to the method of JIS Z-8722.
- a polarizing plate for inspection is overlapped so as to be perpendicular to the direction, white light is irradiated from the polarizing plate side, and 10 inspectors visually observe each from the polarizing plate for inspection, and Visual inspection was evaluated according to the following criteria.
- A4 size samples were cut out from locations corresponding to 10, 50, and 90% of the film width in the film width direction from the end of the obtained polyester film. .
- curable silicone resin (“KS-779H” manufactured by Shin-Etsu-Danigaku), 1 part of curing agent (“CAT-PL-8” manufactured by Shin-Etsu Chemical), 2200 mixed solvent of methyl ethyl ketone (MEK) Z toluene then dried for 10 seconds at and applied to one side of a polyester 170 ° C coating amount to 0. lg / mm 2 ⁇ Konaru impartial than consisting release agent part, after obtaining a release film, release The release film is interposed via a known acrylic adhesive so that the width direction of the film is parallel to the orientation axis of the polarizing film. A polarizing plate with a release film was made to adhere to the polarizing film.
- MEK methyl ethyl ketone
- polyester A having an intrinsic viscosity of 0.65.
- 100 OOppm of calcium carbonate having an average primary particle size of 0.7 / zm was added to obtain a polyester B.
- polyester A 8000 ppm of amorphous silica having an average primary particle size of 2.4 m was added to obtain a polyester C.
- polyester D 20000 ppm of ⁇ -type aluminum oxide having an average primary particle size of 60 nm was added to obtain a polyester D.
- the coating thickness after stretching and drying of the aqueous dispersion coating solution A adjusted to a solid content concentration of 2.5% shown below was 0.05 / zm, apply a 5.4-fold transverse stretching at 120 ° C through a preheating process in a tenter, then heat-treat at 200 ° C for 10 seconds, and then at 180 ° C in the width direction 10% relaxation was performed to obtain a polyester film having a width of 3000 mm and a thickness of 40 ⁇ m.
- the obtained film is excellent in visual inspection and foreign matter recognition, and has high practicality!
- Aqueous coating solution containing 1 ratio Aqueous coating solution containing 1 ratio.
- the polyester film was prepared in the same manner as in Example 1 except that the raw material composition and film forming conditions were as shown in Table 1, and that the aqueous dispersion coating solution A adjusted to have a solid content of 3% by weight was used. Got Lum.
- the obtained polyester film had the results shown in Table 1 and was suitable for practical use.
- a polyester film was obtained in the same manner as in Example 1 except that the aqueous dispersion coating solution A was used.
- the obtained polyester film had the results shown in Table 1 and was suitable for practical use.
- Example 2 Production was carried out in the same manner as in Example 1 except that the raw material composition and film forming conditions were as shown in Table 1, and that the aqueous dispersion coating solution B adjusted to have a solid content of 3% by weight was used. A thick polyester film was obtained. The obtained polyester film had the results shown in Table 1 and was suitable for practical use.
- a polyester film was produced in the same manner as in Example 1 except that the raw material composition and film forming conditions were as shown in Table 2 below, and that the aqueous dispersion coating solution B adjusted to have a solid content of 1% by weight was used. Obtained. The obtained polyester film was poor in white spot defect, poor in visual inspection property and in recognition of foreign matter, and lacked practicality.
- a polyester film was obtained in the same manner as in Example 1, except that the raw material blending and film forming conditions were as shown in Table 2, and that the water-dispersible coating solution was not applied.
- the resulting polyester film was a film lacking in practicality in all of white spot defects, visual inspection, and foreign object recognition.
- Example 1 Example 2 Example 3 Example 4 Polyester A (% by weight) 50 60 60 35 Polyester B (% by weight) 40 30 30 45 Raw material blend Polyester C (% by weight)---Polyester D (% by weight) 10 10 10 20 Polyester A (% by weight) 100 100 100 100 Raw material blend Polyester D (% by weight)
- Raw material blend Polyester C (wt%) 40 30 70 Polyester D (wt%) 40 40 40 Polyester A (wt%) 100 100 100 40 Raw material blend Polyester D (wt%) 60 Film thickness ( ⁇ m) 40 40 40 40 Vertical Stretching ratio 3.4 3.1 2.5 3.1 Longitudinal stretching temperature (° C) 100 100 100 100 100 Stretching ratio 4.2 4.5 4.5 4.5 Lateral stretching temperature (° C) 130 130 130 130 Main crystal temperature (° C) 230 220 220 170 Orientation angle (degree 13.5 10.2 5.8 7.5 Surface 1 j] "Mass (mg / m 2 ) 0.28 2.0 2.0 2.0 Number of coat defects (pcs / m2) 80 ⁇ ⁇
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Laminated Bodies (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Polarising Elements (AREA)
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/582,236 US20070196677A1 (en) | 2003-12-10 | 2004-11-24 | Polyester Film For Release Film |
CN2004800365452A CN1890099B (zh) | 2003-12-19 | 2004-11-24 | 脱模薄膜用聚酯薄膜 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003421895A JP2005178163A (ja) | 2003-12-19 | 2003-12-19 | 離型フィルム用ポリエステルフィルム |
JP2003-421895 | 2003-12-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005056291A1 true WO2005056291A1 (ja) | 2005-06-23 |
WO2005056291A8 WO2005056291A8 (ja) | 2005-09-01 |
Family
ID=34675287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/017377 WO2005056291A1 (ja) | 2003-12-10 | 2004-11-24 | 離型フィルム用ポリエステルフィルム |
Country Status (5)
Country | Link |
---|---|
US (1) | US20070196677A1 (ja) |
JP (1) | JP2005178163A (ja) |
KR (1) | KR20060113719A (ja) |
CN (1) | CN1890099B (ja) |
WO (1) | WO2005056291A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008032428A1 (fr) * | 2006-09-11 | 2008-03-20 | Mitsubishi Polyester Film Corporation | Film de polyester pour pellicule anti-adhésive |
JP2008063538A (ja) * | 2006-09-11 | 2008-03-21 | Mitsubishi Polyester Film Copp | 離型フィルム用ポリエテルフィルム |
JP2008074988A (ja) * | 2006-09-22 | 2008-04-03 | Mitsubishi Polyester Film Copp | 離型フィルム用ポリエテルフィルム |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007111923A (ja) * | 2005-10-18 | 2007-05-10 | Mitsubishi Polyester Film Copp | 離型フィルム |
KR100716145B1 (ko) * | 2005-12-06 | 2007-05-10 | 도레이새한 주식회사 | 편광판용 폴리에스테르 이형필름 |
JP2008163263A (ja) * | 2006-12-29 | 2008-07-17 | Mitsubishi Plastics Ind Ltd | 離型フィルム用ポリエステルフィルム |
WO2008111481A1 (ja) * | 2007-03-12 | 2008-09-18 | Konica Minolta Medical & Graphic, Inc. | 放射線像変換パネル |
WO2009025063A1 (ja) * | 2007-08-22 | 2009-02-26 | Unitika Ltd. | 離型用シート |
JP4928385B2 (ja) * | 2007-08-22 | 2012-05-09 | 帝人デュポンフィルム株式会社 | 偏光板保護フィルムの基材として用いる積層フィルム |
CN101946196B (zh) * | 2008-02-25 | 2012-09-19 | 三菱树脂株式会社 | 离型膜 |
JP5363747B2 (ja) * | 2008-03-04 | 2013-12-11 | 三菱樹脂株式会社 | 積層ポリエステルフィルム |
JP5107761B2 (ja) * | 2008-03-24 | 2012-12-26 | 三菱樹脂株式会社 | 離型フィルム |
JP5271008B2 (ja) * | 2008-09-02 | 2013-08-21 | 帝人デュポンフィルム株式会社 | 積層体 |
JP5249107B2 (ja) * | 2009-03-31 | 2013-07-31 | 三菱樹脂株式会社 | 光学用二軸配向ポリエステルフィルム |
KR20110054990A (ko) * | 2009-11-19 | 2011-05-25 | 도레이첨단소재 주식회사 | 이형필름용 2축 연신 폴리에스테르 필름 및 이를 이용한 이형필름 |
JP2011173260A (ja) * | 2010-02-23 | 2011-09-08 | Mitsubishi Plastics Inc | 二軸配向ポリエステルフィルムおよびこれを用いた離型フィルム |
JP2012025030A (ja) * | 2010-07-23 | 2012-02-09 | Mitsubishi Plastics Inc | 基材レス両面粘着シート用ポリエステルフィルム |
JP2012159548A (ja) * | 2011-01-31 | 2012-08-23 | Mitsubishi Plastics Inc | 偏光板用離型ポリエステルフィルム |
KR101242418B1 (ko) * | 2011-01-13 | 2013-03-11 | 도레이첨단소재 주식회사 | 저열수축 보호필름 |
US10099462B2 (en) * | 2013-06-28 | 2018-10-16 | Toray Plastics (America), Inc. | Releasable polyester high gloss metal transfer film |
US9630385B2 (en) | 2012-11-08 | 2017-04-25 | Toray Plastics (America), Inc. | Releasable polyester metal transfer film |
JP2016045492A (ja) * | 2014-08-20 | 2016-04-04 | 東洋紡株式会社 | 光学フィルム検査用二軸延伸ポリエチレンテレフタレートフィルム |
JP6536123B2 (ja) * | 2015-03-28 | 2019-07-03 | 三菱ケミカル株式会社 | 離型フィルム |
CN111873588A (zh) * | 2019-12-23 | 2020-11-03 | 江苏东材新材料有限责任公司 | 一种高密着性mlcc制程用离型膜基膜及其制备方法 |
Citations (2)
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JP2000289168A (ja) * | 1999-04-05 | 2000-10-17 | Mitsubishi Polyester Film Copp | ポリエステルフィルム |
JP2002207119A (ja) * | 2001-01-05 | 2002-07-26 | Teijin Ltd | 偏光板離形用ポリエステルフィルム |
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US5677024A (en) * | 1993-07-19 | 1997-10-14 | Teijin Limited | Laminate having improved polarization characteristics and release film used therefor |
KR100689974B1 (ko) * | 2000-04-04 | 2007-03-09 | 미쓰비시 가가꾸 폴리에스테르 필름 가부시키가이샤 | 이형 필름 |
-
2003
- 2003-12-19 JP JP2003421895A patent/JP2005178163A/ja active Pending
-
2004
- 2004-11-24 US US10/582,236 patent/US20070196677A1/en not_active Abandoned
- 2004-11-24 KR KR1020067010878A patent/KR20060113719A/ko not_active Application Discontinuation
- 2004-11-24 WO PCT/JP2004/017377 patent/WO2005056291A1/ja active Application Filing
- 2004-11-24 CN CN2004800365452A patent/CN1890099B/zh active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2000289168A (ja) * | 1999-04-05 | 2000-10-17 | Mitsubishi Polyester Film Copp | ポリエステルフィルム |
JP2002207119A (ja) * | 2001-01-05 | 2002-07-26 | Teijin Ltd | 偏光板離形用ポリエステルフィルム |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008032428A1 (fr) * | 2006-09-11 | 2008-03-20 | Mitsubishi Polyester Film Corporation | Film de polyester pour pellicule anti-adhésive |
JP2008063538A (ja) * | 2006-09-11 | 2008-03-21 | Mitsubishi Polyester Film Copp | 離型フィルム用ポリエテルフィルム |
JP2008074988A (ja) * | 2006-09-22 | 2008-04-03 | Mitsubishi Polyester Film Copp | 離型フィルム用ポリエテルフィルム |
Also Published As
Publication number | Publication date |
---|---|
US20070196677A1 (en) | 2007-08-23 |
JP2005178163A (ja) | 2005-07-07 |
CN1890099B (zh) | 2012-08-15 |
CN1890099A (zh) | 2007-01-03 |
WO2005056291A8 (ja) | 2005-09-01 |
KR20060113719A (ko) | 2006-11-02 |
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