WO2023140556A1 - Polyester-based release film - Google Patents

Polyester-based release film Download PDF

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Publication number
WO2023140556A1
WO2023140556A1 PCT/KR2023/000473 KR2023000473W WO2023140556A1 WO 2023140556 A1 WO2023140556 A1 WO 2023140556A1 KR 2023000473 W KR2023000473 W KR 2023000473W WO 2023140556 A1 WO2023140556 A1 WO 2023140556A1
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WO
WIPO (PCT)
Prior art keywords
polyester
particles
release film
based release
film
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Application number
PCT/KR2023/000473
Other languages
French (fr)
Korean (ko)
Inventor
김설경
박한수
Original Assignee
코오롱인더스트리 주식회사
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Publication of WO2023140556A1 publication Critical patent/WO2023140556A1/en

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Classifications

    • 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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
    • B32B2038/0028—Stretching, elongating

Definitions

  • the present invention relates to a polyester-based release film.
  • a polyester-based release film for example, it relates to a laminated polyester-based release film for surface protection used in electronic materials such as multi-layer ceramic condenser (MLCC), polarizer protection, and OCA.
  • MLCC multi-layer ceramic condenser
  • OCA OCA
  • Polyester film has good thermal stability, chemical resistance, mechanical strength, surface characteristics, and thickness uniformity, so it can be applied to various uses or process conditions.
  • polyester films are applied to capacitors, photo films, labels, pressure-sensitive tapes, decorative laminates, transfer tapes, polarizers, and green sheets for ceramic release.
  • the thickness of the green sheet (release film) is becoming thinner and thinner, and therefore, the effect of the physical properties of the green sheet on the ceramic capacitor is inevitably increased.
  • a protruding shape may be transferred to the ceramic sheet.
  • particles are detached, become cutting powder, and adhere to the contact roll, resulting in contamination and scratches.
  • the cutting chips or detached particles adhere to the transfer roll and cause scratches on the surface of the green sheet, and become foreign matter in a later process.
  • One embodiment of the present invention is to provide a polyester-based release film for surface protection used in electronic materials such as ceramic multilayer capacitors (MLCC), polarizer protection and OCA.
  • MLCC ceramic multilayer capacitors
  • OCA optical coherence tomography
  • the release film is a thin film having a thickness of 50 ⁇ m or less so that it can be applied to a release film of a thin-film ceramic multilayer capacitor (MLCC), but has excellent roll winding and slip properties. It is to provide a polyester-based release film.
  • MLCC thin-film ceramic multilayer capacitor
  • the release film is intended to provide a polyester-based release film with less occurrence of pinholes when a ceramic slurry is applied to manufacture a thin ceramic sheet.
  • an object of the present invention is to provide a polyester-based release film that has less cutting dust even at high speed feed during film production, less dust generation during film cutting, and no scratches during winding.
  • the present invention is a polyester base film containing particles having a particle size distribution in a unimodal form on one side of the polyester surface layer containing particles having a bimodal type of particle size distribution and the other side of the polyester surface layer containing particles It is possible to provide a polyester-based release film laminated.
  • the surface roughness (Ra) of the surface layer including the particles having the bimodal particle size distribution may be 0.010 to 0.030 ⁇ m.
  • the surface layer may include particles having a unimodal particle size distribution and have a surface roughness (Ra) of 0.001 to 0.015 ⁇ m.
  • the average particle diameter of the particles of the surface layer including the bimodal type particles may be 0.05 to 2 ⁇ m.
  • the average particle diameter of the particles of the surface layer including the particles having the unimodal particle size distribution may be 0.03 to 1 ⁇ m.
  • the content of the particles of the surface layer may include those of 300 to 5,000 ppm, respectively.
  • the particles may include any one or a mixture of two or more selected from inorganic particles and organic particles.
  • the inorganic particles may include any one or two or more selected from metal oxides, metal carbides, metal sulfides, and metal carbonitrides.
  • the organic particles may include any one or a mixture of two or more selected from silicone resins, crosslinked acrylic particles, crosslinked polystyrene particles, benzoguanamine-formaldehyde resins, benzoguanamine-melamine-formaldehyde resins, and melamine-formaldehyde resins.
  • the polyester may include a polyethylene terephthalate resin.
  • it may include manufacturing by stretching after the co-extrusion.
  • the polyester-based release film of the present invention is a thin film, but has excellent rollability and slipability on a roll, and when a ceramic slurry is applied to manufacture a thin ceramic sheet, it can provide an effect with less pinholes.
  • polyester-based release film with less cutting powder and less dust generation during film cutting even when high-speed feed is performed during film production, such as MLCC.
  • the meaning of 'Bimodal' when measuring the particle size distribution, when two peaks or when the particle size distribution has a shoulder peak, or when inorganic particles having different average particle diameters are mixed It may include all cases.
  • the release film of the present invention includes a polyester surface layer containing particles having a bimodal particle size distribution on one side of a polyester base film and a polyester surface layer containing particles having a unimodal particle size distribution on the other side.
  • the present invention was completed by manufacturing a polyester laminated film laminated.
  • the release film may have a surface roughness (Ra) of 0.010 to 0.030 ⁇ m
  • the polyester surface layer including particles having a bimodal particle size distribution on one side of the polyester base film may have a surface roughness (Ra) of 0.001 to 0.015 ⁇ m.
  • Ra surface roughness
  • it can achieve the above object better and may be preferred.
  • the release film adopts a polyester surface layer having essentially a bimodal distribution by mixing two types of inorganic or organic particles having different average particle diameters on one side of the polyester base film, and having a polyester surface layer using particles having one particle size distribution on the other side, thereby having a flat surface of the film, but including effective protrusions capable of improving handling and winding properties during post-processing, and generating less dust during cutting and preventing scratches during winding.
  • the present invention was completed by finding that a release film can be provided.
  • a surface layer having a surface roughness (Ra) of 0.010 to 0.030 ⁇ m containing particles having a bimodal particle size distribution is laminated on one side of the polyester base film, and a surface layer having a surface roughness (Ra) of 0.001 to 0.015 ⁇ m containing particles having a unimodal particle size distribution is laminated on the other side of the base film.
  • the unimodal particles of one surface layer of the film may be preferred because they exhibit better physical properties when particles having an average particle diameter (D mean ) of 0.03 ⁇ m to 1 ⁇ m are added in an amount of 300 to 5,000 ppm relative to the surface layer.
  • the polyester resin used for the base film and both surface layers is not particularly limited, and a conventional polyester resin may be used. Specifically, for example, it may be obtained by condensation polymerization of an acid component containing dicarboxylic acid as a main component and a glycol component containing alkylene glycol as a main component.
  • the dicarboxylic acids are not limited, but terephthalic acid or its alkyl esters or phenyl esters may be used, and some of them may be substituted with difunctional carboxylic acids or ester-forming derivatives thereof such as isophthalic acid, oxyethoxybenzoic acid, adipic acid, sebacic acid, and 5-sodium sulfoisophthalic acid.
  • the glycol component is not limited, but ethylene glycol is mainly used, and propylene glycol, neopentyl glycol, trimethylene glycol, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol, 1,4-bisoxyethoxybenzene, bisphenol, polyoxyethylene glycol, etc. may be mixed and used, and a monofunctional compound or a trifunctional compound may be used in combination.
  • it may include one or more components selected from additives commonly used during polyester resin polymerization, that is, a pinning agent, an antistatic agent, an ultraviolet stabilizer, a waterproofing agent, a slip agent, and a heat stabilizer, but is not limited thereto.
  • the polyester resin may be polyethylene terephthalate. That is, the polyester resin may be polyethylene terephthalate prepared by using terephthalic acid as dicarboxylic acid and ethylene glycol as glycol. It may also be a polyethylene terephthalate copolymer.
  • the polyester resin may be prepared by a TPA (Terephthalic acid) polymerization method or a DMT (dimethyl terephthalate) polymerization method, which are conventional polymerization methods in the art, but is not limited thereto.
  • the release film has a laminated structure having different surface properties on both sides of the polyester base film, and by adjusting a specific surface roughness using particles having different properties, dust is not generated during cutting of the film, and surface roughness of both surfaces is transferred. While trying to prevent occurrence of pinholes or thickness imbalance in the layer applied to the release layer due to transfer of the surface roughness, at the same time, handling such as roll runability and winding property can be improved to greatly improve productivity.
  • the surface roughness (Ra) of the surface layer including particles having a bimodal particle size distribution formed on one surface of the release film may be 0.010 to 0.030 ⁇ m, and the surface roughness (Ra) of the surface layer including particles having a unimodal particle size distribution may be 0.001 to 0.015 ⁇ m, so that the particles having a unimodal particle size distribution have an average particle size of 0.03 to 0.03 ⁇ m.
  • It may be 1 ⁇ m, specifically 0.05 to 0.8 ⁇ m, and may be a surface layer added in an amount of 300 to 5,000 ppm with respect to the surface layer, and particles having a bimodal particle size distribution may have an average particle diameter of 0.05 to 2 ⁇ m, specifically 0.1 to 1 ⁇ m, and may be a surface layer added with an amount of 300 to 5,000 ppm with respect to the surface layer
  • particles having a bimodal particle size distribution may have an average particle diameter of 0.05 to 2 ⁇ m, specifically 0.1 to 1 ⁇ m, and may be a surface layer added with an amount of 300 to 5,000 ppm with respect to the surface layer
  • the ratio of the large particles to the small particles may be 3 or more, 4 or more, 5 or more, 6 or more, 7 or more, or 10 or more within the range of the average particle diameter and content, for example, in the range of 3 to 30, and the content ratio is not limited as long as the object of the present invention is achieved, but the weight ratio of the large particles and the small particles may be 0.1 to 10, but is not limited thereto No.
  • the release film according to the embodiment having both surface layers having the above characteristics does not generate scratches during winding, has excellent rollability and slipperiness for rolls even though it is a thin film, and has excellent smoothness.
  • a polyester-based release film with less pinholes can be provided.
  • the release film can provide a film capable of reducing pinhole generation and MLCC Short defect rate due to surface roughness transfer.
  • the particles of the surface layer may be any one or a mixture of two or more selected from inorganic particles and organic particles.
  • the inorganic particles may be any one or two or more selected from metal oxides, metal carbides, metal sulfides, and metal carbonitrides. Although not limited, for example, calcium carbonate, titanium oxide, aluminum oxide, silica, kaolin, barium sulfate, etc. are exemplified, but any inorganic particle used in this field is not limited.
  • the organic particles may be any one or a mixture of two or more selected from silicone resin, crosslinked acrylic particles, crosslinked polystyrene particles, benzoguanamine-formaldehyde resin particles, benzoguanamine-melamine-formaldehyde resin particles, and melamine-formaldehyde resin particles, but are not limited thereto.
  • the particles when the particles are added in the form of particle slurry dispersed in a glycol component during polyester resin synthesis, it is effective because it has excellent dispersibility and can prevent reaggregation between particles, but is not limited thereto. That is, it may be added before the start of the polycondensation reaction after the transesterification reaction or after the end of the transesterification reaction, but is not limited thereto.
  • the release film may be prepared by obtaining pellets by preparing particles during polymerization as described above, co-extruding them, laminating them on both sides of a base film, and stretching them as necessary.
  • a separate master batch can be prepared using a polyester base resin and the particles, mixed with a polyester resin, melt-kneaded, and co-extruded to be laminated on both sides of a base film, and then, if necessary, a stretching process may be further subjected.
  • the release film according to one aspect of the present invention may be a biaxially stretched polyester film, but is not necessarily limited thereto.
  • the biaxial stretching may be simultaneous biaxial stretching or sequential biaxial stretching, and in the case of sequential biaxial stretching, a process of stretching in the longitudinal direction (machine direction) and then stretching in the width direction (transverse direction) It can be achieved.
  • machine direction longitudinal direction
  • width direction transverse direction
  • the release film may be biaxially stretched 3 to 5 times in the machine direction and 4 to 6 times in the width direction, and at the stretching ratio, the thermal dimensional stability of the polymer structure may be further increased to reduce heat shrinkage, so it is preferable, but not limited thereto.
  • the release film may be heat-treated at 200 to 250 ° C. and relaxed by 1 to 10% after biaxial stretching. Specifically, it may be to impart relaxation at the same time as heat treatment, and more specifically, it may be 1 to 10% in the width direction, and more specifically, 2 to 4% relaxation. In the above range, the film is maintained in a tensioned state in the width direction to increase the density of the polymer structure and reduce deformation due to heat, so it is preferable, but is not limited thereto.
  • the release film according to one embodiment of the present invention based on JIS B-0601, the number of macroprotrusions measured using a three-dimensional surface roughness meter (Tokyoseimitsu, Surfcom 590A-3DF-12) is 2.0 / mm 2 or less, more specifically, 0.1 to 2 / mm 2 or less, since it satisfies windability and runability, it is possible to provide a film with improved productivity, so it is preferable, but not limited thereto.
  • the release film may have a total thickness of 10 to 50 ⁇ m, more specifically, 20 to 40 ⁇ m. Since the polyester film used as the base film of the release film for MLCC is continuously becoming thinner in thickness, it may be suitable for application within the above range.
  • the thickness ratio of the base film and the surface layer on both sides of the release film may be 50%: 50% to 90% to 10%, more preferably 60%: 40% to 80%: 20%. In the above range, it is preferable to provide a film having excellent running properties, excellent slip properties, improved winding properties on rolls, and less generation of cutting chips.
  • the thickness of the surface layer on both sides is not particularly limited, but when the thickness ratio is 1:0.8 to 1.2, the effect of the present invention can be better achieved, so it is preferred, but not limited thereto.
  • the polyester film was sectioned into three parts on the left/middle/right, and then measured using a three-dimensional surface roughness meter (Tokyoseimitsu, Surfcom 590A-3DF-12) at a measurement speed of 0.03 mm/sec, a stylus radius of 2 ⁇ m, and a load of 0.7 mm/N, measuring area of 1.0 mm 2 , and cutoff value of 0.08 mm.
  • a three-dimensional surface roughness meter Tokyoseimitsu, Surfcom 590A-3DF-12
  • polyester films prepared in Examples and Comparative Examples were evaluated as follows by calculating the amount of product produced versus the input amount during manufacture.
  • Winding yield (%) product production/input amount ⁇ 100
  • the manufactured film is slit at a speed of 300 m/min to a width of 500 mm, and the presence or absence of particles caused by the PET cuttings of the 500 mm film roll after the slit is checked on the surface of the film roll.
  • Grade 5, 13 points or more was grade 6.
  • polyester chips (1) 0.3% by weight of silica (particle A) having an average particle diameter of 0.3 ⁇ m was added to the polyester chips (1) and melt-extruded using a twin-screw kneader to prepare polyester chips (2).
  • a polyester chip (1) was used for the core layer, and the chip (2) was used for the surface layer corresponding to the release surface and the chip (3) was used as the surface layer corresponding to the back surface to form a three-layer film laminated on the release surface/core layer/back surface. Coextruded into a film and cast on a cooling roll to prepare an unstretched sheet. At this time, the core layer was 80% by weight of the total film weight, the surface layer was 20% by weight of the total film weight, and each surface layer was co-extruded with the same weight.
  • a sheet was prepared by rapidly cooling and solidifying with a casting drum having a surface temperature of 20°C.
  • the prepared sheet was stretched 3.5 times in the machine direction and 4.0 times in the transverse direction at 95° C., and heat-treated at 230° C. to prepare a biaxially stretched film having a thickness of 30 ⁇ m.
  • the physical properties of the prepared film were measured and shown in Table 2 below.
  • Example 1 the weight ratio of the chip 2 and the chip 3 was set to 1:2, and the weight ratio of the core layer and the surface layer was co-extruded at a weight ratio of 70:30.
  • the physical properties of the prepared film were measured and shown in Table 2 below.
  • Example 1 was carried out in the same manner as in Example 1 except that the size of the particles in the chip (2) was 0.6 ⁇ m. As a result, physical properties of the composite film were measured and are shown in Table 2 below.
  • Example 1 was carried out in the same manner as in Example 1, except that the size of the large particle in the chip 3 was changed to 1.4 ⁇ m. As a result, the physical properties of the multiple film were measured and are shown in Table 2 below.
  • Example 1 was carried out in the same manner as in Example 1, except that a single particle of 0.7 ⁇ m was used for the chip (3). As a result, physical properties of the composite film were measured and are shown in Table 2 below.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

The present invention relates to a polyester-based release film. Specifically, the present invention provides a polyester release film in which a plurality of respective surface layers having different types of particle size distributions are deposited, and thus provides a polyester-based release film, which is excellent in winding properties on a roll and slip properties and has less pinhole occurrence in the preparation of a thin-film ceramic sheet by application of a ceramic slurry.

Description

폴리에스테르계 이형필름Polyester release film
본 발명은 폴리에스테르계 이형필름에 관한 것이다. 예를 들면, 세라믹 적층 콘덴서 (Multi-layer Ceramic condenser, 이하 MLCC), 편광판 보호용 및 OCA용 등의 전자재료에 사용되는 표면 보호용 적층 폴리에스테르계 이형필름에 관한 것이다.The present invention relates to a polyester-based release film. For example, it relates to a laminated polyester-based release film for surface protection used in electronic materials such as multi-layer ceramic condenser (MLCC), polarizer protection, and OCA.
폴리에스테르 필름(Polyester film)은 열안정성, 내화학성, 기계적 강도, 표면특성, 두께의 균일성이 양호하여 다양한 용도나 공정조건에 적용이 가능하다.Polyester film has good thermal stability, chemical resistance, mechanical strength, surface characteristics, and thickness uniformity, so it can be applied to various uses or process conditions.
상기 특성으로 폴리에스테르 필름은 콘덴서용, 사진필름용, 라벨용, 감압 테이프, 장식용 라미네이트, 트랜스퍼 테이프, 편광판 및 세라믹 이형용 그린시트 등에 적용되고 있다.Due to the above characteristics, polyester films are applied to capacitors, photo films, labels, pressure-sensitive tapes, decorative laminates, transfer tapes, polarizers, and green sheets for ceramic release.
특히 세라믹 적층 콘덴서의 경우 상기 콘텐서가 소형화가 진행됨에 따라, 그린시트(이형필름)의 두께도 더욱 더 박막화되고 있으며, 따라서 그린시트의 물성이 세라믹콘덴서에 미치는 영향이 더욱 증대될 수 밖에 없다.In particular, in the case of ceramic multilayer capacitors, as the capacitor is miniaturized, the thickness of the green sheet (release film) is becoming thinner and thinner, and therefore, the effect of the physical properties of the green sheet on the ceramic capacitor is inevitably increased.
예를 들면 그린시트의 표면조도가 높은 경우는 돌출 형태가 세라믹 시트에 전사되는 문제가 발생한다. 또한 상기 그린시트를 이송롤과 접촉하여 고속으로 이송하였을 때, 입자가 탈리되고, 절삭분이 되어 접촉되는 롤에 묻어 오염이 발생해 흠집이 발생하는 문제가 발생한다. 또한 상기 절삭분이나 탈리된 입자는 이송롤에 부착되어 그린시트의 표면에 흠집을 발생시키는 원인이 되며, 후 공정에서 이물이 된다.For example, when the surface roughness of the green sheet is high, a protruding shape may be transferred to the ceramic sheet. In addition, when the green sheet is brought into contact with the transfer roll and transferred at high speed, particles are detached, become cutting powder, and adhere to the contact roll, resulting in contamination and scratches. In addition, the cutting chips or detached particles adhere to the transfer roll and cause scratches on the surface of the green sheet, and become foreign matter in a later process.
반대로 그린 시트의 표면조도가 너무 낮은 경우는 세라믹 슬러리 도포 시 도포 안정성, 필름 주행성과 슬립성이 저하된다. 또한 그린시트를 롤에 권취 할 때 스크래치 등이 발생할 수 있다.Conversely, if the surface roughness of the green sheet is too low, application stability, film runability and slip properties are deteriorated during application of the ceramic slurry. In addition, scratches may occur when winding the green sheet into a roll.
따라서 상기와 같이, 표면특성이 우수한 그린시트(이형필름)를 개발함으로써, 슬립특성을 개선하고 롤에 대한 권취성을 개선하며, 절삭분 및 스크레치가 발생을 방지할 수 있는 효과를 제공할 수 있으므로, 그린시트의 표면특성 개선은 여전히 개선될 여지가 많고 또한 그 필요성이 세라믹 콘덴서의 소형화 및 박막화에 의해 더욱 증대되는 실정이다.Therefore, as described above, by developing a green sheet (release film) having excellent surface properties, it is possible to provide an effect of improving slip properties, improving roll winding properties, and preventing the occurrence of chips and scratches. Therefore, there is still a lot of room for improvement in surface properties of green sheets, and the need for this is further increasing due to the miniaturization and thinning of ceramic capacitors.
본 발명의 일 구현예는 세라믹 적층 콘덴서(MLCC), 편광판 보호용 및 OCA용 등의 전자재료에 사용되는 표면 보호용 폴리에스테르계 이형필름을 제공하는 것이다.One embodiment of the present invention is to provide a polyester-based release film for surface protection used in electronic materials such as ceramic multilayer capacitors (MLCC), polarizer protection and OCA.
일 구현예로 상기 이형필름은 박막의 세라믹 적층 콘덴서(MLCC)의 이형필름에 적용이 가능하도록 두께 50 ㎛이하의 박막의 필름이면서도, 롤에 대한 권취성 및 슬립성이 우수한 폴리에스테르계 이형필름을 제공하고자 하는 것이다.In one embodiment, the release film is a thin film having a thickness of 50 μm or less so that it can be applied to a release film of a thin-film ceramic multilayer capacitor (MLCC), but has excellent roll winding and slip properties. It is to provide a polyester-based release film.
일 구현예로 상기 이형필름은 세라믹 슬러리를 도포하여 박막의 세라믹 시트를 제조할 때, 핀홀 발생이 적은 폴리에스테르계 이형필름을 제공하고자 한다.In one embodiment, the release film is intended to provide a polyester-based release film with less occurrence of pinholes when a ceramic slurry is applied to manufacture a thin ceramic sheet.
또한, 필름 제조 시 고속 이송을 하여도 절삭분이 적으며, 필름 절삭 시 분진발생이 적고 또한 권취 시 스크래치가 발생하지 않는 폴리에스테르계 이형필름을 제공하고자 한다.In addition, an object of the present invention is to provide a polyester-based release film that has less cutting dust even at high speed feed during film production, less dust generation during film cutting, and no scratches during winding.
상기 안출된 문제점을 해결하기 위해, 본 발명은 폴리에스테르 베이스 필름의 일면에 바이모달 형태의 입도분포를 가지는 입자를 포함하는 폴리에스테르 표면층과 타면에는 유니모달 형태의 입도분포를 가지는 입자를 포함하는 폴리에스테르 표면층이 적층된 폴리에스테르계 이형필름을 제공할 수 있다.In order to solve the problems raised above, the present invention is a polyester base film containing particles having a particle size distribution in a unimodal form on one side of the polyester surface layer containing particles having a bimodal type of particle size distribution and the other side of the polyester surface layer containing particles It is possible to provide a polyester-based release film laminated.
본 발명의 일 양태에 따라, 상기 바이모달 형태의 입도분포를 가지는 입자를 포함하는 표면층의 표면조도(Ra)가 0.010 내지 0.030㎛인 것을 포함하는 것일 수 있다.According to one aspect of the present invention, the surface roughness (Ra) of the surface layer including the particles having the bimodal particle size distribution may be 0.010 to 0.030 μm.
본 발명의 일 양태에 따라, 상기 유니모달 형태의 입도분포를 가지는 입자를 포함하며 표면층의 표면조도(Ra)가 0.001 내지 0.015㎛인 것을 포함하는 것일 수 있다.According to one aspect of the present invention, the surface layer may include particles having a unimodal particle size distribution and have a surface roughness (Ra) of 0.001 to 0.015 μm.
본 발명의 일 양태에 따라, 상기 바이모달 형태의 입자를 포함하는 표면층의 입자의 평균입경은 0.05 내지 2㎛인 것을 포함하는 것일 수 있다.According to one aspect of the present invention, the average particle diameter of the particles of the surface layer including the bimodal type particles may be 0.05 to 2 μm.
본 발명의 일 양태에 따라, 상기 유니모달 형태의 입도분포를 가지는 입자를 포함하는 표면층의 입자의 평균입경은 0.03 내지 1㎛인 것을 포함하는 것일 수 있다.According to one aspect of the present invention, the average particle diameter of the particles of the surface layer including the particles having the unimodal particle size distribution may be 0.03 to 1 μm.
본 발명의 일 양태에 따라, 상기 표면층의 입자의 함량은 각각 300 내지 5,000ppm인 것을 포함하는 것 일 수 있다.According to one aspect of the present invention, the content of the particles of the surface layer may include those of 300 to 5,000 ppm, respectively.
본 발명의 일 양태에 따라, 상기 입자는 무기입자 및 유기입자 중에서 선택되는 어느 하나 또는 둘 이상을 혼합한 혼합물을 포함하는 것 일 수 있다.According to one aspect of the present invention, the particles may include any one or a mixture of two or more selected from inorganic particles and organic particles.
본 발명의 일 양태에 따라, 상기 무기입자는 금속산화물, 금속탄화물, 금속황화물, 금속탄질화물 등에서 선택되는 어느 하나 또는 둘 이상의 것을 포함하는 것 일 수 있다.According to one aspect of the present invention, the inorganic particles may include any one or two or more selected from metal oxides, metal carbides, metal sulfides, and metal carbonitrides.
본 발명의 일 양태에 따라, 상기 유기입자는 실리콘 수지, 가교아크릴입자, 가교폴리스티렌입자, 벤조구아나민-포름알데히드수지, 벤조구아나민-멜라민-포름알데히드수지 및 멜라민-포름알데히드수지 등에서 선택되는 어느 하나 또는 둘 이상의 혼합물을 포함하는 것 일 수 있다.According to one aspect of the present invention, the organic particles may include any one or a mixture of two or more selected from silicone resins, crosslinked acrylic particles, crosslinked polystyrene particles, benzoguanamine-formaldehyde resins, benzoguanamine-melamine-formaldehyde resins, and melamine-formaldehyde resins.
본 발명의 일 양태에 따라, 상기 폴리에스테르는 폴리에틸렌테레프탈레이트 수지인 것을 포함할 수 있다.According to one aspect of the present invention, the polyester may include a polyethylene terephthalate resin.
본 발명의 일 양태에 따른, 이형필름이 공압츨에 의해 제조되는 것인 폴리에스테르계 이형필름을 제공할 수 있다.According to one aspect of the present invention, it is possible to provide a polyester-based release film in which the release film is manufactured by pneumatic extrusion.
본 발명의 일 양태에 따라, 상기 공압출 한 후, 연신하여 제조하는 것을 포함하는 것일 수 있다.According to one aspect of the present invention, it may include manufacturing by stretching after the co-extrusion.
일 구현예에 따른 본 발명의 폴리에스테르계 이형필름은 박막의 필름이면서도 롤에 대한 권취성 및 슬립성이 우수하며, 세라믹 슬러리를 도포하여 박막의 세라믹 시트를 제조할 때, 핀홀 발생이 적은 효과를 제공할 수 있다.The polyester-based release film of the present invention according to an embodiment is a thin film, but has excellent rollability and slipability on a roll, and when a ceramic slurry is applied to manufacture a thin ceramic sheet, it can provide an effect with less pinholes.
또한, MLCC 등의 필름 제조 시 고속 이송을 하여도 절삭분이 적으며, 필름 절삭 시 분진발생이 적은 폴리에스테르계 이형필름을 제공할 수 있다.In addition, it is possible to provide a polyester-based release film with less cutting powder and less dust generation during film cutting even when high-speed feed is performed during film production, such as MLCC.
이하 본 발명을 더욱 상세히 설명한다. 다만 하기 구체예 또는 실시예는 본 발명을 상세히 설명하기 위한 하나의 참조일 뿐 본 발명이 이에 한정되는 것은 아니며, 여러 형태로 구현될 수 있다.Hereinafter, the present invention will be described in more detail. However, the following specific examples or examples are only one reference for explaining the present invention in detail, but the present invention is not limited thereto, and may be implemented in various forms.
또한 달리 정의되지 않는 한, 모든 기술적 용어 및 과학적 용어는 본 발명이 속하는 당업자에 의해 일반적으로 이해되는 의미와 동일한 의미를 갖는다. 본 발명에서 설명에 사용되는 용어는 단지 특정 구체예를 효과적으로 기술하기 위함이고 본 발명을 제한하는 것으로 의도되지 않는다.Also, unless defined otherwise, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms used in the description in the present invention are merely to effectively describe specific embodiments and are not intended to limit the present invention.
또한 명세서 및 첨부된 특허청구범위에서 사용되는 단수 형태는 문맥에서 특별한 지시가 없는 한 복수 형태도 포함하는 것으로 의도할 수 있다.Also, the singular forms used in the specification and appended claims may be intended to include the plural forms as well, unless the context dictates otherwise.
또한 어떤 부분이 어떤 구성요소를 "포함"한다고 할 때, 이는 특별히 반대되는 기재가 없는 한 다른 구성요소를 제외하는 것이 아니라 다른 구성요소를 더 포함할 수 있는 것을 의미한다.In addition, when a certain component is said to "include", this means that it may further include other components without excluding other components unless otherwise stated.
또한 본 발명에서 '바이모달(Bimodal)'의 의미는 입도분포를 측정할 때, 2가지 피크나 또는 입도분포가 솔더(shoulder) 피크를 가지는 경우 또는 서로 상이한 평균 입경을 가지는 무기입자를 혼합한 경우를 모두 포함할 수 있다.In addition, in the present invention, the meaning of 'Bimodal' when measuring the particle size distribution, when two peaks or when the particle size distribution has a shoulder peak, or when inorganic particles having different average particle diameters are mixed It may include all cases.
이하는 본 발명의 각 구성에 대하여 보다 구체적으로 설명한다.Hereinafter, each configuration of the present invention will be described in more detail.
일 구현예에 따른 본 발명의 이형필름은 폴리에스테르 베이스 필름의 일면에 바이모달 형태의 입도분포를 가지는 입자를 포함하는 폴리에스테르 표면층과 타면에는 유니모달 형태의 입도분포를 가지는 입자를 포함하는 폴리에스테르 표면층이 적층된 폴리에스테르 적층 필름을 제조함으로써 본 발명을 완성하였다.According to one embodiment, the release film of the present invention includes a polyester surface layer containing particles having a bimodal particle size distribution on one side of a polyester base film and a polyester surface layer containing particles having a unimodal particle size distribution on the other side. The present invention was completed by manufacturing a polyester laminated film laminated.
일 구현예로서 상기 이형필름은 폴리에스테르 베이스 필름의 일면에 바이모달 형태의 입도분포를 가지는 입자를 포함하는 폴리에스테르 표면층은 표면조도(Ra)가 0.010 내지 0.030㎛일 수 있으며, 상기 베이스필름의 타면에 유니모달 형태의 입도분포를 가지는 입자를 포함하는 폴리에스테르 표면층으로서 표면조도(Ra)가 0.001 내지 0.015㎛인 표면층이 적층된 적층 폴리에스테르계 적층필름인 경우 상기 목적을 더 잘 달성할 수 있어서 더 선호될 수 있다.As an embodiment, the release film may have a surface roughness (Ra) of 0.010 to 0.030 μm, and the polyester surface layer including particles having a bimodal particle size distribution on one side of the polyester base film may have a surface roughness (Ra) of 0.001 to 0.015 μm. In the case of , it can achieve the above object better and may be preferred.
일 구현예에 따라 상기 이형필름은 폴리에스테르 베이스 필름의 일면에 평균입경이 상이한 2종의 무기입자나 유기입자를 혼합하여 본질적으로 바이모달 분포를 가지는 폴리에스테르 표면층을 채택하고 타면에는 하나의 입도분포를 가지는 입자를 사용한 폴리에스테르 표면층을 가짐으로써, 필름의 표면이 평탄하면서도 후가공시 핸들링성 및 필름의 권취성을 향상시킬 수 있는 유효돌기를 포함하며, 절삭 시 분진 발생이 적고 권취시 스크레치가 발생하지 않는 그린시트인 이형필름을 제공할 수 있음을 발견하여 본 발명을 완성하였다.According to one embodiment, the release film adopts a polyester surface layer having essentially a bimodal distribution by mixing two types of inorganic or organic particles having different average particle diameters on one side of the polyester base film, and having a polyester surface layer using particles having one particle size distribution on the other side, thereby having a flat surface of the film, but including effective protrusions capable of improving handling and winding properties during post-processing, and generating less dust during cutting and preventing scratches during winding. The present invention was completed by finding that a release film can be provided.
일 구현예로서, 상기 이형필름에 있어서, 상기 폴리에스테르 베이스 필름의 일면에 바이모달 형태의 입도분포를 가지는 입자를 포함하는 표면조도(Ra)가 0.010 내지 0.030㎛인 표면층과, 상기 베이스필름의 타면에 유니모달 형태의 입도분포를 가지는 입자를 포함하는 표면조도(Ra)가 0.001 내지 0.015㎛인 표면층이 적층된 적층 폴리에스테르 적층필름을 제공하기 위하여, 적층필름의 일 표면층의 유니모달 입자는 평균입경(Dmean)이 0.03㎛ 내지 1㎛인 입자가 상기 표면층에 대하여 300 내지 5,000ppm 함량으로 첨가될 경우, 더욱 우수한 물성을 나타내므로 더 선호될 수 있다.As an embodiment, in the release film, a surface layer having a surface roughness (Ra) of 0.010 to 0.030 μm containing particles having a bimodal particle size distribution is laminated on one side of the polyester base film, and a surface layer having a surface roughness (Ra) of 0.001 to 0.015 μm containing particles having a unimodal particle size distribution is laminated on the other side of the base film. To provide a laminated polyester laminated film, The unimodal particles of one surface layer of the film may be preferred because they exhibit better physical properties when particles having an average particle diameter (D mean ) of 0.03 μm to 1 μm are added in an amount of 300 to 5,000 ppm relative to the surface layer.
일 구현예에서 상기 베이스필름 및 양 표면층에 사용되는 폴리에스테르 수지는 특별히 제한되지 않으며, 통상의 폴리에스테르 수지를 사용하는 것일 수 있다. 구체적으로 예를 들면, 디카르복실산을 주성분으로 하는 산성분과 알킬렌 글리콜을 주성분으로 하는 글리콜 성분을 축중합하여 얻어진 것일 수 있다.In one embodiment, the polyester resin used for the base film and both surface layers is not particularly limited, and a conventional polyester resin may be used. Specifically, for example, it may be obtained by condensation polymerization of an acid component containing dicarboxylic acid as a main component and a glycol component containing alkylene glycol as a main component.
상기 디카르복실산은 제한되지 않으나 테레프탈산 또는 그의 알킬에스테르나 페닐에스테르 등을 사용할 수 있고, 일부는 이소프탈산, 옥시에톡시 안식향산, 아디핀산, 세바신산 및 5-나트륨설포이소프탈산 등의 이관능성 카르본산 또는 그의 에스테르 형성 유도체로 치환하여 사용할 수 있다.The dicarboxylic acids are not limited, but terephthalic acid or its alkyl esters or phenyl esters may be used, and some of them may be substituted with difunctional carboxylic acids or ester-forming derivatives thereof such as isophthalic acid, oxyethoxybenzoic acid, adipic acid, sebacic acid, and 5-sodium sulfoisophthalic acid.
또한 글리콜 성분으로는 제한되지 않으나, 에틸렌 글리콜을 주로 사용하고, 프로필렌글리콜, 네오펜틸글리콜, 트리메틸렌글리콜, 1,4-사이클로헥산디올, 1,4-사이클로헥산디메탄올, 1,4-비스옥시에톡시벤젠, 비스페놀 및 폴리옥시에틸렌글리콜 등을 혼합하여 사용할 수 있으며, 일관능성 화합물 또는 삼관능성 화합물을 일부 병용할 수 있다.In addition, the glycol component is not limited, but ethylene glycol is mainly used, and propylene glycol, neopentyl glycol, trimethylene glycol, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol, 1,4-bisoxyethoxybenzene, bisphenol, polyoxyethylene glycol, etc. may be mixed and used, and a monofunctional compound or a trifunctional compound may be used in combination.
이 밖에도 폴리에스테르 수지 중합 시 통상적으로 사용되는 첨가제 즉, 피닝제(pinning), 대전방지제, 자외선 안정제, 방수제, 슬립제 및 열안정제 중에서 선택되는 1종 또는 2종 이상의 성분을 포함할 수 있으며, 이에 제한되는 것은 아니다.In addition, it may include one or more components selected from additives commonly used during polyester resin polymerization, that is, a pinning agent, an antistatic agent, an ultraviolet stabilizer, a waterproofing agent, a slip agent, and a heat stabilizer, but is not limited thereto.
본 발명의 일 양태에서, 상기 폴리에스테르 수지는 폴리에틸렌 테레프탈레이트일 수 있다. 즉, 상기 폴리에스테르 수지는 디카르복실산으로 테레프탈산(Terephthalic acid)을 사용하고, 글리콜로 에틸렌글리콜(Ethylene glycol)을 사용하여 제조한 폴리에틸렌 테레프탈레이트일 수 있다. 또한 폴리에틸렌테레프탈레이트 공중합체일 수 있다. 상기 폴리에스테르 수지는 당해 기술분야에서 통상적인 중합방법인 TPA(Terephthalic acid)중합법 또는 DMT(dimethyl terephthalate)중합법 등으로 제조할 수 있으며, 이로 제한되는 것은 아니다.In one aspect of the present invention, the polyester resin may be polyethylene terephthalate. That is, the polyester resin may be polyethylene terephthalate prepared by using terephthalic acid as dicarboxylic acid and ethylene glycol as glycol. It may also be a polyethylene terephthalate copolymer. The polyester resin may be prepared by a TPA (Terephthalic acid) polymerization method or a DMT (dimethyl terephthalate) polymerization method, which are conventional polymerization methods in the art, but is not limited thereto.
일 구현예로서 상기 이형필름은 상기 폴리에스테르 베이스필름의 양면에 서로 상이한 표면특성의 적층구조를 가는 것으로서, 서로 상이한 특성의 입자들을 이용하여 특정의 표면조도를 조절함으로써, 필름의 절삭 시 분진이 발생하지 않고, 양 표면의 표면조도의 전사로 인해 이형층에 도포되는 층에 핀홀이나 두께 불균형 등이 발생하는 것을 방지하고자 하면서, 동시에 롤 주행성, 권취성 등 핸들링(Handling)성이 개선되어 생산성을 크게 향상시킬 수 있다.As an embodiment, the release film has a laminated structure having different surface properties on both sides of the polyester base film, and by adjusting a specific surface roughness using particles having different properties, dust is not generated during cutting of the film, and surface roughness of both surfaces is transferred. While trying to prevent occurrence of pinholes or thickness imbalance in the layer applied to the release layer due to transfer of the surface roughness, at the same time, handling such as roll runability and winding property can be improved to greatly improve productivity.
일 구현예에서 이형필름의 일 면에 형성된 바이모달 형태의 입도분포를 가지는 입자를 포함하는 표면층의 표면조도(Ra)가 0.010 내지 0.030㎛일 수 있고 또한 유니모달 형태의 입도분포를 가지는 입자를 포함하는 표면층의 표면조도(Ra)가 0.001 내지 0.015㎛을 가지기 위하여 상기 유니모달 형태의 입도분포를 가지는 입자는 평균입경이 0.03 내지 1㎛일 수 있으며, 구체적으로 0.05 내지 0.8 ㎛일 수 있으며, 표면층에 대하여 300 내지 5,000ppm 함량으로 첨가된 표면층일 수 있고, 바이모달 형태의 입도분포를 가지는 입자는 평균입경이 0.05 내지 2㎛일 수 있으며, 구체적으로 0.1 내지 1 ㎛일 수 있으며, 표면층에 대하여 300 내지 5,000ppm 함량으로 첨가된 표면층일 수 있지만 본 발명의 목적을 달성하는 한에서는 이에 한정하지 않는다. 또한 상기 바이모달 형태의 입도분포를 가지는 표면층이 두 가지 상이한 입자를 혼합하는 경우, 상기 평균입경 및 함량의 범위 내에서 큰입자와 작은입자의 비가 3이상, 4이상, 5이상, 6이상, 7이상, 10이상 일 수 있으며, 예를 들면 3 내지 30의 범위일 수 있고 그 함량비는 본 발명의 목적을 달성하는 한에서는 제한하지 않지만 큰입자와 작은입자의 중량비가 0.1 내지 10일 수 있지만 이에 한정하는 것은 아니다.In one embodiment, the surface roughness (Ra) of the surface layer including particles having a bimodal particle size distribution formed on one surface of the release film may be 0.010 to 0.030 μm, and the surface roughness (Ra) of the surface layer including particles having a unimodal particle size distribution may be 0.001 to 0.015 μm, so that the particles having a unimodal particle size distribution have an average particle size of 0.03 to 0.03 μm. It may be 1 μm, specifically 0.05 to 0.8 μm, and may be a surface layer added in an amount of 300 to 5,000 ppm with respect to the surface layer, and particles having a bimodal particle size distribution may have an average particle diameter of 0.05 to 2 μm, specifically 0.1 to 1 μm, and may be a surface layer added with an amount of 300 to 5,000 ppm with respect to the surface layer As long as the object of the present invention is achieved, it is not limited thereto. In addition, when the surface layer having a bimodal particle size distribution is mixed with two different particles, the ratio of the large particles to the small particles may be 3 or more, 4 or more, 5 or more, 6 or more, 7 or more, or 10 or more within the range of the average particle diameter and content, for example, in the range of 3 to 30, and the content ratio is not limited as long as the object of the present invention is achieved, but the weight ratio of the large particles and the small particles may be 0.1 to 10, but is not limited thereto No.
또한, 상기의 특성의 양 표면층을 가지는 상기 일 구현예에 다른 이형필름은 권취시에 스크레치가 발생하지 않고, 박막의 필름이면서도 롤에 대한 권취성 및 슬립성이 우수하며, 평활성이 우수하여 세라믹 슬러리를 도포하여 박막의 세라믹 시트를 제조할 때, 핀홀 발생이 적은 폴리에스테르계 이형필름을 제공할 수 있다.In addition, the release film according to the embodiment having both surface layers having the above characteristics does not generate scratches during winding, has excellent rollability and slipperiness for rolls even though it is a thin film, and has excellent smoothness. When a thin ceramic sheet is manufactured by applying a ceramic slurry, a polyester-based release film with less pinholes can be provided.
또한 상기 이형필름은 표면조도 전사로 인한 핀홀 발생 및 MLCC Short 불량률을 감소시킬 수 있는 필름을 제공할 수 있다.In addition, the release film can provide a film capable of reducing pinhole generation and MLCC Short defect rate due to surface roughness transfer.
또한, 필름 제조 시 고속 이송을 하여도 절삭분이 적으며, 필름 절삭 시 분진발생이 적은 폴리에스테르계 이형필름을 제공할 수 있다.In addition, it is possible to provide a polyester-based release film with less cutting powder even when high-speed feed is performed during film production and less dust generated during film cutting.
일 구현예에서 상기 표면층의 입자는 무기입자 및 유기입자 중에서 선택되는 어느 하나 또는 둘 이상을 혼합한 혼합물인 것일 수 있다.In one embodiment, the particles of the surface layer may be any one or a mixture of two or more selected from inorganic particles and organic particles.
일 구현예에서 상기 무기입자는 금속산화물, 금속탄화물, 금속황화물, 금속탄질화물 등에서 선택되는 어느 하나 또는 둘 이상의 것일 수 있다. 제한 하지는 않지만, 예를 든다면, 탄산칼슘, 산화티탄, 산화알루미늄, 실리카, 고령토 및 황산바륨 등을 예로 들 수 있지만 이 분야에서 사용하는 무기입자라면 제한하지 않는다. 상기 유기입자의 예를 들면, 실리콘 수지, 가교아크릴 입자, 가교폴리스티렌 입자, 벤조구아나민-포름알데히드수지 입자, 벤조구아나민-멜라민-포름알데히드수지 입자 및 멜라민-포름알데히드수지 입자 등에서 선택되는 어느 하나 또는 둘 이상의 혼합물인 것일 수 있지만 이에 한정하는 것은 아니다.In one embodiment, the inorganic particles may be any one or two or more selected from metal oxides, metal carbides, metal sulfides, and metal carbonitrides. Although not limited, for example, calcium carbonate, titanium oxide, aluminum oxide, silica, kaolin, barium sulfate, etc. are exemplified, but any inorganic particle used in this field is not limited. For example, the organic particles may be any one or a mixture of two or more selected from silicone resin, crosslinked acrylic particles, crosslinked polystyrene particles, benzoguanamine-formaldehyde resin particles, benzoguanamine-melamine-formaldehyde resin particles, and melamine-formaldehyde resin particles, but are not limited thereto.
일 구현예에서 상기 입자들은 폴리에스테르 수지 합성 시 글리콜 성분에 분산시킨 입자 슬러리 형태로 첨가하는 것이 분산성이 우수하고, 입자들 간의 재응집을 방지할 수 있으므로 효과적이나, 이에 제한되는 것은 아니다. 즉, 에스테르화 교환반응 또는상기 에스테르 교환 반응 종료 후 중축합 반응 시작 전에도 첨가하는 것일 수 있으나 이에 제한되지 않는다.In one embodiment, when the particles are added in the form of particle slurry dispersed in a glycol component during polyester resin synthesis, it is effective because it has excellent dispersibility and can prevent reaggregation between particles, but is not limited thereto. That is, it may be added before the start of the polycondensation reaction after the transesterification reaction or after the end of the transesterification reaction, but is not limited thereto.
일 구현예로서, 상기 이형 필름은 상기와 같이 중합시 입자를 제조하여 펠렛을 얻고 이를 공압출하여 베이스 필름의 양면에 적층하고 필요에 의해 연신하여 제조할 수 있다.As an embodiment, the release film may be prepared by obtaining pellets by preparing particles during polymerization as described above, co-extruding them, laminating them on both sides of a base film, and stretching them as necessary.
또한 폴리에스테르 베이스 수지와 상기 입자들을 이용하여 별도의 마스터배치를 제조하고 이를 다시 폴리에스테르 수지와 혼합하여 용융혼련하고 공압출하여 베이스 필름의 양면에 적층하여 제조할 수 있으며, 필요에 의해 적층한 후 연신과정을 더 거칠 수 있다.In addition, a separate master batch can be prepared using a polyester base resin and the particles, mixed with a polyester resin, melt-kneaded, and co-extruded to be laminated on both sides of a base film, and then, if necessary, a stretching process may be further subjected.
본 발명의 일 양태에 따른 이형필름은 이축연신 폴리에스테르 필름일 수 있지만 반드시 이에 한정하는 것은 아니다.The release film according to one aspect of the present invention may be a biaxially stretched polyester film, but is not necessarily limited thereto.
일 구현예로, 상기 이축연신은 동시 이축연신 또는 순차 이축 연신인 것일 수 있으며, 순차 이축 연신의 경우는 길이방향(종방향)으로 연신 후, 폭방향(횡방향)으로 연신하는 공정을 수행함으로써 달성될 수 있다. 이와 같이 이축연신 함으로써 길이방향 및 폭방향의 강도 및 결정화 상태를 균일하게 하고 각 방향에서의 재단을 효율적으로 수행할 수 있다.In one embodiment, the biaxial stretching may be simultaneous biaxial stretching or sequential biaxial stretching, and in the case of sequential biaxial stretching, a process of stretching in the longitudinal direction (machine direction) and then stretching in the width direction (transverse direction) It can be achieved. By performing biaxial stretching as described above, strength and crystallization state in the longitudinal and lateral directions can be made uniform, and cutting in each direction can be performed efficiently.
일 구현예로, 상기 이형필름은 기계방향으로 3 내지 5배 및 폭방향으로 4 내지 6배 이축 연신된 것일 수 있으며, 상기 연신비에서 고분자 구조의 열적 치수안정성이 더욱 증가하여 열수축을 줄일 수 있으므로 바람직하나 이에 제한되는 것은 아니다.In one embodiment, the release film may be biaxially stretched 3 to 5 times in the machine direction and 4 to 6 times in the width direction, and at the stretching ratio, the thermal dimensional stability of the polymer structure may be further increased to reduce heat shrinkage, so it is preferable, but not limited thereto.
본 발명의 일 양태에서, 상기 이형필름은 이축연신 후 200 ~ 250 ℃에서 열처리 및 1 ~ 10% 이완된 것일 수 있다. 구체적으로 열처리와 동시에 이완을 부여하는 것일 수 있으며, 더욱 구체적으로 폭방향으로 1 ~ 10%, 더욱 구체적으로 2 ~ 4% 이완을 하는 것일 수 있다. 상기 범위에서 필름이 폭방향으로 긴장된 상태를 유지하여 고분자 구조의 치밀성이 높아지고, 열에 의한 변형을 줄일 수 있으므로 바람직하나, 이에 제한되는 것은 아니다.In one aspect of the present invention, the release film may be heat-treated at 200 to 250 ° C. and relaxed by 1 to 10% after biaxial stretching. Specifically, it may be to impart relaxation at the same time as heat treatment, and more specifically, it may be 1 to 10% in the width direction, and more specifically, 2 to 4% relaxation. In the above range, the film is maintained in a tensioned state in the width direction to increase the density of the polymer structure and reduce deformation due to heat, so it is preferable, but is not limited thereto.
본 발명의 일 구현예에 따른 상기 이형필름은 JIS B-0601을 기준으로, 3차원 표면조도 측정기(Tokyoseimitsu, Surfcom 590A-3DF-12)를 사용하여 측정된 거대돌기의 개수가 2.0개/mm2 이하, 더욱 구체적으로 0.1 내지 2개/mm2 이하인 경우, 권취성 및 주행성을 만족하므로 생산성이 향상되는 필름을 제공할 수 있으므로 바람직하나 이에 제한되는 것은 아니다.The release film according to one embodiment of the present invention, based on JIS B-0601, the number of macroprotrusions measured using a three-dimensional surface roughness meter (Tokyoseimitsu, Surfcom 590A-3DF-12) is 2.0 / mm 2 or less, more specifically, 0.1 to 2 / mm 2 or less, since it satisfies windability and runability, it is possible to provide a film with improved productivity, so it is preferable, but not limited thereto.
일 구현예로서 상기 이형필름의 총 두께가 10 ~ 50 ㎛, 더욱 구체적으로 20 내지 40 ㎛인 것일 수 있다. MLCC용 이형필름의 기재필름으로 사용되는 폴리에스테르 필름은 지속적으로 그 사용 두께가 박막화 되어가고 있는 추세이므로 상기 범위에서 적용하기에 적합할 수 있다.As an embodiment, the release film may have a total thickness of 10 to 50 μm, more specifically, 20 to 40 μm. Since the polyester film used as the base film of the release film for MLCC is continuously becoming thinner in thickness, it may be suitable for application within the above range.
또한, 일 구현예로서 상기 이형필름에서 베이스 필름과 양면의 표면층의 두께비가 50%: 50% 내지 90% 내지 10%, 더욱 좋게는 60%: 40 % 내지 80%: 20%인 것일 수 있다. 상기 범위에서 주행성이 우수하며, 슬립성이 우수하고, 롤에 대한 권취성이 향상되며, 절삭분이 적게 발생하는 필름을 제공할 수 있어서 바람직하다.In addition, as an embodiment, the thickness ratio of the base film and the surface layer on both sides of the release film may be 50%: 50% to 90% to 10%, more preferably 60%: 40% to 80%: 20%. In the above range, it is preferable to provide a film having excellent running properties, excellent slip properties, improved winding properties on rolls, and less generation of cutting chips.
또한, 본 발명에서 양면의 표면층의 두께는 특별히 제한하지 않지만 두께비가 1:0.8 내지 1.2의 두께로 하는 경우 본 발명의 효과를 더욱 잘 달성할 수 있으므로 더 선호되지만 이에 한정하는 것은 아니다.In addition, in the present invention, the thickness of the surface layer on both sides is not particularly limited, but when the thickness ratio is 1:0.8 to 1.2, the effect of the present invention can be better achieved, so it is preferred, but not limited thereto.
이하 실시예 및 비교예를 바탕으로 본 발명을 더욱 상세히 설명한다. 다만 하기 실시예 및 비교예는 본 발명을 더욱 상세히 설명하기 위한 하나의 예시일 뿐, 본 발명이 하기 실시예 및 비교예에 의해 제한되는 것은 아니다.The present invention will be described in more detail based on the following Examples and Comparative Examples. However, the following Examples and Comparative Examples are only one example for explaining the present invention in more detail, and the present invention is not limited by the following Examples and Comparative Examples.
이하 물성을 다음과 같이 평가하였다.The physical properties were evaluated as follows.
[평균입경][Average Particle Diameter]
입도분포 측정기(Beckman社의 LS13 320)을 사용하여 측정하였다.It was measured using a particle size distribution analyzer (Beckman's LS13 320).
[표면조도(Ra)][Surface roughness (Ra)]
JIS B-0601을 기준으로, 폴리에스테르 필름을 좌/중/우 3개소로 절편한 후, 3차원 표면조도 측정기(Tokyoseimitsu, Surfcom 590A-3DF-12)를 사용하여 측정 속도 0.03mm/sec, 촉침 반경 2㎛, 하중 0.7mm/N, 측정면적 1.0mm2, 컷오프치 0.08mm의 조건하에서 측정하였다.Based on JIS B-0601, the polyester film was sectioned into three parts on the left/middle/right, and then measured using a three-dimensional surface roughness meter (Tokyoseimitsu, Surfcom 590A-3DF-12) at a measurement speed of 0.03 mm/sec, a stylus radius of 2 μm, and a load of 0.7 mm/N, measuring area of 1.0 mm 2 , and cutoff value of 0.08 mm.
중심선을 x축, 수직방향을 y축으로 하여 조도곡선을 y=f(x)로 나타냈을 때 하기의 식으로 계산하였다.When the center line is the x-axis and the vertical direction is the y-axis and the roughness curve is expressed as y = f (x), it was calculated by the following formula.
Figure PCTKR2023000473-appb-img-000001
Figure PCTKR2023000473-appb-img-000001
(L: 기준길이(Cut-Off))(L: standard length (Cut-Off))
[권취수율][winding yield]
실시예 및 비교예에서 제조된 폴리에스테르 필름을 제조 시 투입량 대비 제품 생산량을 계산하여 다음과 같이 평가하였다.The polyester films prepared in Examples and Comparative Examples were evaluated as follows by calculating the amount of product produced versus the input amount during manufacture.
권취수율(%) = 제품 생산량/투입량 × 100Winding yield (%) = product production/input amount × 100
◎ : 수율이 65% 이상일 때◎: When the yield is 65% or more
○ : 수율이 55 이상 65% 미만일 때○: When the yield is 55 or more and less than 65%
△ : 수율이 55% 미만일 때△: When the yield is less than 55%
[절삭분 발생 정도][Degree of cutting chips]
제조된 필름을 300 m/min의 속도로 500 mm의 폭에 슬릿하고 슬릿 후의 500 mm의 필름 롤 PET 절삭분에 의한 입자의 유무를 필름 롤 표면에서 확인하고 1 m2 당 알맹이 수가 0점이었던 경우는 1급, 1점~3점인 경우에는 2급, 4점~6점인 경우에는 3급, 7점~9점이기도 한 경우에는 4급, 10~12점의 경우는 5급, 13 점 이상을 6급으로 하였다.The manufactured film is slit at a speed of 300 m/min to a width of 500 mm, and the presence or absence of particles caused by the PET cuttings of the 500 mm film roll after the slit is checked on the surface of the film roll. Grade 5, 13 points or more was grade 6.
[실시예 1][Example 1]
1) 폴리에스테르 수지칩(1) 제조1) Manufacture of polyester resin chips (1)
디메틸테레프탈레이트 100 중량부에 대하여, 에틸렌글리콜 50 중량부, 정전피닝제로써 마그네슘아세테이트를 400ppm와 칼슘아세테이트 200ppm, 중합촉매로 삼산화안티몬 150ppm을 에스테르화 반응기에 투입한 후 상온에서 230 ℃까지 4시간동안 에스테르 교환 반응을 진행시켜, 예비중합물 BHET(bis-βterephthalate)를 제조하였다. 반응 중 발생한 부산물인 메탄올은 반응기 외로 유출시켜 증류탑을 통하여 분리하고 에스테르화 반응 종료 후 추가로 발생하는 에틸렌 글리콜 역시 증류탑을 통해 분리하였다. 이 때, 열안정제로 트리메틸포스페이트 200ppm을 첨가한 후 285 ℃까지 서서히 승온함과 동시에, 압력을 0.3 torr까지 감압하였다. 고진공하에서 중축합 반응을 4시간동안 수행하여 고유점도 0.630 dl/g의 폴리에틸렌 테레프탈레이트(PET) 수지 칩을 제조하였다.Based on 100 parts by weight of dimethyl terephthalate, 50 parts by weight of ethylene glycol, 400 ppm of magnesium acetate and 200 ppm of calcium acetate as an electrostatic pinning agent, and 150 ppm of antimony trioxide as a polymerization catalyst were introduced into an esterification reactor, followed by transesterification at room temperature to 230 ° C. for 4 hours to prepare a prepolymer BHET (bis-β terephthalate). Methanol, a by-product generated during the reaction, was discharged out of the reactor and separated through a distillation tower, and ethylene glycol additionally generated after the esterification reaction was completed was also separated through a distillation tower. At this time, after adding 200 ppm of trimethylphosphate as a heat stabilizer, the temperature was gradually raised to 285 °C and the pressure was reduced to 0.3 torr. A polycondensation reaction was performed under high vacuum for 4 hours to prepare a polyethylene terephthalate (PET) resin chip having an intrinsic viscosity of 0.630 dl/g.
2) 유니모달 표면층(이형면) 폴리에스테르 칩(2)의 제조2) Manufacture of unimodal surface layer (release surface) polyester chip (2)
상기 폴리에스테르 칩(1)에 평균입경이 0.3㎛의 실리카(입자A)를 0.3 중량% 첨가하여 이축혼련기를 이용하여 용융압출하여 폴리에스테르 칩(2)를 제조하였다.0.3% by weight of silica (particle A) having an average particle diameter of 0.3 μm was added to the polyester chips (1) and melt-extruded using a twin-screw kneader to prepare polyester chips (2).
3) 바이모달 표면층(배면) 폴리에스테르 칩(3)의 제조3) Manufacture of bimodal surface layer (rear surface) polyester chip (3)
상기 폴리에스테르 칩(1)에 평균입경이 0.8㎛의 탄산칼슘(입자B)을 0.1 중량% 및 200nm 의 탄산칼슘 0.2㎛의 탄산칼슘입자 0.4 중량%를 첨가하여 이축 혼련기를 이용하여 용융압출하여 폴리에스테르 칩(3)를 제조하였다.0.1% by weight of calcium carbonate (Particle B) having an average particle diameter of 0.8 μm and 0.4% by weight of 200 nm calcium carbonate and 0.2 μm calcium carbonate particles were added to the polyester chips (1) and melt-extruded using a twin-screw kneader to prepare polyester chips (3).
4) 필름의 제조4) Manufacture of film
코어층에는 폴리에스테르 칩(1)를 사용하고, 이형면에 해당하는 표면층에는 상기 칩(2) 및 배면에 해당하는 표면층으로 칩(3)을 사용하여 이형면/코어층/배면으로 적층된 3층 필름으로 공압출하고, 냉각롤에 캐스팅하여 미연신 시트를 제조하였다. 이때, 상기의 코어층은 전체필름중량의 80 중량%, 표면층은 전체 필름중량의 20 중량%로 각 표면층은 동일 중량으로 공압출 하였다.A polyester chip (1) was used for the core layer, and the chip (2) was used for the surface layer corresponding to the release surface and the chip (3) was used as the surface layer corresponding to the back surface to form a three-layer film laminated on the release surface/core layer/back surface. Coextruded into a film and cast on a cooling roll to prepare an unstretched sheet. At this time, the core layer was 80% by weight of the total film weight, the surface layer was 20% by weight of the total film weight, and each surface layer was co-extruded with the same weight.
압출기를 통해 용융 압출한 후 표면 온도 20℃인 캐스팅드럼으로 급냉, 고화시켜 시트를 제조하였다. 제조된 시트를 95℃에서 기계방향으로 3.5배, 횡방향으로 4.0배 연신하고, 230℃에서 열처리하여 두께 30㎛의 2축 연신 필름을 제조하였다. 제조된 필름의 물성을 측정하여 하기 표 2에 나타내었다.After melt-extruding through an extruder, a sheet was prepared by rapidly cooling and solidifying with a casting drum having a surface temperature of 20°C. The prepared sheet was stretched 3.5 times in the machine direction and 4.0 times in the transverse direction at 95° C., and heat-treated at 230° C. to prepare a biaxially stretched film having a thickness of 30 μm. The physical properties of the prepared film were measured and shown in Table 2 below.
[실시예 2 ][Example 2]
실시예 1에서 칩(2)와 칩(3)의 중량비를 1:2로 하고, 코어층과 표면층의 중량비를 70:30중량비로 공압출한 것을 제외하고는 동일하게 실시하였다. 제조된 필름의 물성을 측정하여 하기 표 2에 나타내었다.In Example 1, the weight ratio of the chip 2 and the chip 3 was set to 1:2, and the weight ratio of the core layer and the surface layer was co-extruded at a weight ratio of 70:30. The physical properties of the prepared film were measured and shown in Table 2 below.
[실시예 3][Example 3]
실시예 1에서 칩(2)에서 입자의 크기를 0.6㎛으로 한 것을 제외하고는 동일하게 실시하였다. 그 결과 복합필름의 물성을 측정하여 하기 표 2에 나타내었다.Example 1 was carried out in the same manner as in Example 1 except that the size of the particles in the chip (2) was 0.6 μm. As a result, physical properties of the composite film were measured and are shown in Table 2 below.
[실시예 4][Example 4]
실시예 1에서 칩(3)에서 큰 입자의 크기를 1.4 ㎛으로 변경한 것을 제외하고는 동일하게 실시하였다.그 결과 복합필름의 물성을 측정하여 하기 표 2에 나타내었다.Example 1 was carried out in the same manner as in Example 1, except that the size of the large particle in the chip 3 was changed to 1.4 μm. As a result, the physical properties of the multiple film were measured and are shown in Table 2 below.
[비교예 1][Comparative Example 1]
실시예 1에서 칩(3)에서 입자를 0.7㎛의 단일입자를 사용한 것을 제외하고는 동일하게 실시하였다. 그 결과 복합필름의 물성을 측정하여 하기 표 2에 나타내었다.Example 1 was carried out in the same manner as in Example 1, except that a single particle of 0.7 μm was used for the chip (3). As a result, physical properties of the composite film were measured and are shown in Table 2 below.
절삭분 발생 정도Degree of cutting chips 생산수율production yield 표면조도 Ra
(nm) - 바이모달면Surface roughness Ra
(nm) - Bimodal 		표면조도 Ra
(nm) - 유니모달면Surface roughness Ra
(nm) - unimodal face
실시예 1Example 1 1급1st grade 양호Good 1818 1010
실시예 2Example 2 1급1st grade 양호Good 1616 1010
실시예 3Example 3 2급2nd grade 양호Good 1818 1414
실시예 4Example 4 3급level 3 보통commonly 2222 1010
비교예 1Comparative Example 1 4급4th grade 불량error 1616 1616
상기 표 1에서 보는 바와 같이 2종의 입자를 사용하더라도 입자간의 입자크기 비 및 바이모달 입도분포가 본 발명의 범위를 벗어나는 경우 생산수율이 불량인 것을 알 수 있었다. 또한 절삭분의 발생이 증가하고, 권취수율이 저하되며, 표면조도가 증가함을 확인하였다.이상과 같이 본 발명에서는 특정된 사항들과 한정된 실시예에 의해 설명되었으나 이는 본 발명의 보다 전반적인 이해를 돕기 위해서 제공된 것일 뿐, 본 발명은 상기의 실시예에 한정되는 것은 아니며, 본 발명이 속하는 분야에서 통상의 지식을 가진 자라면 이러한 기재로부터 다양한 수정 및 변형이 가능하다.As shown in Table 1, even if two types of particles were used, it was found that the production yield was poor when the particle size ratio and bimodal particle size distribution were out of the scope of the present invention. In addition, it was confirmed that the generation of cutting chips increased, the winding yield decreased, and the surface roughness increased. As described above, the present invention has been described with specific details and limited examples, but this is only provided to help a more general understanding of the present invention, the present invention is not limited to the above examples, and various modifications and variations can be made from these descriptions by those skilled in the art.
따라서, 본 발명의 사상은 설명된 실시예에 국한되어 정해져서는 아니되며, 후술하는 특허청구범위뿐 아니라 이 특허청구범위와 균등하거나 등가적 변형이 있는 모든 것들은 본 발명 사상의 범주에 속한다고 할 것이다.Therefore, the spirit of the present invention should not be limited to the described embodiments and should not be determined, and all things equivalent or equivalent to the claims as well as the following claims belong to the scope of the present invention.

Claims (12)

  1. 폴리에스테르 베이스 필름의 일면에 바이모달 형태의 입도분포를 가지는 입자를 포함하는 폴리에스테르 표면층과 타면에는 유니모달 형태의 입도분포를 가지는 입자를 포함하는 폴리에스테르 표면층이 적층된 폴리에스테르계 이형필름.A polyester-based release film in which a polyester surface layer containing particles having a bimodal particle size distribution is laminated on one side of a polyester base film and a polyester surface layer containing particles having a unimodal particle size distribution is laminated on the other side.
  2. 제 1항에 있어서,According to claim 1,
    상기 바이모달 형태의 입도분포를 가지는 입자를 포함하는 표면층의 표면조도(Ra)가 0.010 내지 0.030㎛인 폴리에스테르계 이형필름.A polyester-based release film having a surface roughness (Ra) of 0.010 to 0.030 μm of a surface layer containing particles having a bimodal particle size distribution.
  3. 제 1항에 있어서,According to claim 1,
    상기 유니모달 형태의 입도분포를 가지는 입자를 포함하며 표면층의 표면조도(Ra)가 0.001 내지 0.015㎛인 폴리에스테르계 이형필름.A polyester-based release film comprising particles having the unimodal particle size distribution and having a surface roughness (Ra) of 0.001 to 0.015 μm of the surface layer.
  4. 제 2항에 있어서,According to claim 2,
    상기 바이모달 형태의 입자를 포함하는 표면층의 입자의 평균입경은 0.05 내지 2㎛인 것인 폴리에스테르계 이형필름.The average particle diameter of the particles of the surface layer containing the bimodal type particles is 0.05 to 2㎛ polyester-based release film.
  5. 제 3항에 있어서,According to claim 3,
    상기 유니모달 형태의 입도분포를 가지는 입자를 포함하는 표면층의 입자의 평균입경은 0.03 내지 1㎛인 것인 폴리에스테르계 이형필름.The average particle diameter of the particles of the surface layer containing the particles having a particle size distribution of the unimodal form is 0.03 to 1㎛, the polyester-based release film.
  6. 제 1항에 있어서,According to claim 1,
    상기 표면층의 입자의 함량은 각각 300 내지 5,000ppm인 것인 폴리에스테르계 이형필름.A polyester-based release film in which the content of the particles of the surface layer is 300 to 5,000 ppm, respectively.
  7. 제 1항에 있어서,According to claim 1,
    상기 입자는 무기입자 및 유기입자 중에서 선택되는 어느 하나 또는 둘 이상을 혼합한 혼합물인 폴리에스테르계 이형필름.The particle is a polyester-based release film that is a mixture of any one or two or more selected from inorganic particles and organic particles.
  8. 제 7항에 있어서,According to claim 7,
    상기 무기입자는 금속산화물, 금속탄화물, 금속황화물, 금속탄질화물 등에서 선택되는 어느 하나 또는 둘 이상인 폴리에스테르계 이형필름.The inorganic particles are any one or two or more polyester-based release film selected from metal oxides, metal carbides, metal sulfides, metal carbonitrides, and the like.
  9. 제 7항에 있어서,According to claim 7,
    상기 유기입자는 실리콘 수지, 가교아크릴입자, 가교폴리스티렌입자, 벤조구아나민-포름알데히드수지, 벤조구아나민-멜라민-포름알데히드수지 및 멜라민-포름알데히드수지 등에서 선택되는 어느 하나 또는 둘 이상의 혼합물인 폴리에스테르계 이형필름.The organic particles are any one or a mixture of two or more selected from silicone resins, crosslinked acrylic particles, crosslinked polystyrene particles, benzoguanamine-formaldehyde resins, benzoguanamine-melamine-formaldehyde resins, and melamine-formaldehyde resins. Polyester-based release film.
  10. 제 1항에 있어서,According to claim 1,
    상기 폴리에스테르는 폴리에틸렌테레프탈레이트 수지인 것인 폴리에스테르계 이형필름.The polyester is a polyester-based release film that is a polyethylene terephthalate resin.
  11. 제 1항 내지 제 10항에서 선택되는 어느 한 항의 이형필름이 공압출에 의해 제조되는 것인 폴리에스테르계 이형필름의 제조방법.A method for producing a polyester-based release film in which the release film of any one of claims 1 to 10 is produced by co-extrusion.
  12. 제 11항에 있어서,According to claim 11,
    상기 공압출 한 후, 연신하여 제조하는 것인 폴리에스테르계 이형필름의 제조방법.After the co-extrusion, a method for producing a polyester-based release film that is prepared by stretching.
PCT/KR2023/000473 2022-01-19 2023-01-11 Polyester-based release film WO2023140556A1 (en)

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KR1020220007886A KR20230111886A (en) 2022-01-19 2022-01-19 Polyester release film

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100002377A (en) * 2008-06-30 2010-01-07 주식회사 코오롱 Biaxial streched polyester film
KR20100067876A (en) * 2008-12-12 2010-06-22 에스케이씨 주식회사 White porous multi-layer polyester film and preparation thereof
KR20190063462A (en) * 2016-09-30 2019-06-07 유니띠까 가부시키가이샤 Polyester film
KR20190075565A (en) * 2017-12-21 2019-07-01 코오롱인더스트리 주식회사 Polyester film
KR20220005207A (en) * 2020-07-06 2022-01-13 도레이첨단소재 주식회사 Laminated polyester film

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003191384A (en) 2001-12-26 2003-07-08 Mitsubishi Polyester Film Copp Polyester film for release film

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100002377A (en) * 2008-06-30 2010-01-07 주식회사 코오롱 Biaxial streched polyester film
KR20100067876A (en) * 2008-12-12 2010-06-22 에스케이씨 주식회사 White porous multi-layer polyester film and preparation thereof
KR20190063462A (en) * 2016-09-30 2019-06-07 유니띠까 가부시키가이샤 Polyester film
KR20190075565A (en) * 2017-12-21 2019-07-01 코오롱인더스트리 주식회사 Polyester film
KR20220005207A (en) * 2020-07-06 2022-01-13 도레이첨단소재 주식회사 Laminated polyester film

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