KR100515795B1 - Biaxially Oriented Polyester Laminated Film - Google Patents
Biaxially Oriented Polyester Laminated Film Download PDFInfo
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- KR100515795B1 KR100515795B1 KR10-1998-0039369A KR19980039369A KR100515795B1 KR 100515795 B1 KR100515795 B1 KR 100515795B1 KR 19980039369 A KR19980039369 A KR 19980039369A KR 100515795 B1 KR100515795 B1 KR 100515795B1
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- oriented polyester
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/022—Mechanical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/102—Oxide or hydroxide
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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
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/514—Oriented
- B32B2307/518—Oriented bi-axially
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
본 발명은 이축배향 폴리에스테르 필름내에서 광택도를 조절할 수 있고 표면의 거칠기를 일정 조도이상 크게 할수 있는 5.0∼15㎛ 입자를 선정하고 이 입자가 들어 있는 층을 양 표면층(A,C층)으로 하고 가운데 층(B)은 평균입경이 0.01∼7.0㎛의 입자를 1.0∼3.0중량% 함유하는 선상 폴리에스테르로 구성되고 평균조도(Ra) 및 광택도(GLOSS)가 아래 조건을 만족하는 3층 구조의 이축배향 폴리에스테르 적층 필름으로, 저 광택도와 고 조도를 동시에 만족하면서도 가운데 층 사용입자를 제한함으로써 제조공정중 연신성이 우수하여 횡연신 공정중 파단이 없는 이축배향 폴리에스테르 적층 필름에 관한 것이다. The present invention selects 5.0-15㎛ particles which can control the glossiness in the biaxially oriented polyester film and increase the surface roughness over a certain roughness, and the layer containing these particles as both surface layers (A, C layers). The middle layer (B) is composed of linear polyester containing 1.0 to 3.0% by weight of particles having an average particle diameter of 0.01 to 7.0 µm, and a three-layer structure in which the average roughness Ra and glossiness satisfy the following conditions. The biaxially oriented polyester laminated film of the present invention relates to a biaxially oriented polyester laminated film having excellent ductility in the manufacturing process by satisfying low gloss and high roughness at the same time and having excellent stretchability during the manufacturing process by limiting particles used in the middle layer.
0% ≤광택도(GLOSS) ≤ 45%0% ≤ glossiness (GLOSS) ≤ 45%
400㎚ ≤ 평균조도(Ra) ≤ 2000㎚400 nm ≤ average roughness (Ra) ≤ 2000 nm
Description
본 발명은 저광택도와 고 조도를 동시에 만족시켜 매트 특성이 우수하고 연신성이 우수하여 연신공정중 파단이 없는 이축배향 폴리에스테르 필름에 관한 것으로, 보다 상세하게는 폴리에스테르 필름의 표층에 적당한 크기의 돌기를 형성하고 내부층은 표층 보다 작은 입자를 사용하여 3층 구조의 필름을 제조함으로서 매트성이 우수하고 연신과정중 찢어짐성이 없는 이축배향 폴리에스테르 적층 필름에 관한 것이다. The present invention relates to a biaxially oriented polyester film that satisfies both low gloss and high roughness at the same time and has excellent mat properties and excellent stretchability, and thus does not break during the stretching process, and more particularly, a projection having a suitable size for the surface layer of the polyester film. The inner layer relates to a biaxially oriented polyester laminated film having excellent matting properties and no tearing during the stretching process by producing a three-layered film using particles smaller than the surface layer.
이축배향 폴리에스테르 필름은 물리적, 화학적 특성이 우수하므로 산업상으로 널리 이용되고 있다. 특히 기계적 강도 열적 특성, 전기적 성질, 내약품성 및 내습성,내수성이 우수하여 포장용, 자기테이프용, 사진용, 콘덴서용 등에 이용되고 있다. 특히 필름의 광택도가 45% 이하의 매트성을 지니면서 라벨의 색감이 천연 나무결 무늬(WOOD GRAIN)의 효과를 재현하기 위해서는 큰 입자를 사용하고 동시에 많은 량을 사용하여 고조도 및 보이드를 크게하여야할 필요가 있으나, 연신시 큰입자의 보이드에 의한 찢겨짐이 발생하여 균일한 품질의 필름을 얻기 어려웠다.Biaxially oriented polyester films are widely used in industry because of their excellent physical and chemical properties. In particular, mechanical strength, thermal properties, electrical properties, chemical resistance and moisture resistance, water resistance is used for packaging, magnetic tape, photographic, condenser and the like. In particular, in order to reproduce the effect of natural wood grain with the glossiness of the film of less than 45% and the color of the label, it is necessary to use large particles at the same time to increase the high intensity and voids. Although it is necessary to tear, the tearing by the void of a large particle at the time of extending | stretching generate | occur | produced, and it was difficult to obtain a film of uniform quality.
매트성을 부여하기 위한 방법으로서는 일본 특개소55-50036호에 무정형 실리카를 폴리에스테르중에 첨가하는 방법으로 저 광택성을 부여하는 방법이 소개 되어 있지만 입경이 큰 입자를 사용시 연신시의 찢어짐을 방지할 수 없고, 또한, 일본 공개특허평 8-309847호에서 공중합 폴리에스테르를 사용하여 저광택 및 투명한 매트 필름이 제안된바 있으나 높은 수율의 저광택도 필름 제조에는 적합하지가 않았다.As a method for imparting matte properties, Japanese Laid-Open Patent Publication No. 55-50036 discloses a method of imparting low glossiness by adding amorphous silica to polyester, but it is possible to prevent tearing when stretching using particles having a large particle size. In addition, although low gloss and transparent matte films have been proposed in Japanese Patent Laid-Open No. 8-309847 using copolyesters, they are not suitable for the production of high yield low gloss film.
본 발명은 상기와 같은 문제점을 해결하기 위하여, 이축배향 폴리에스테르 필름이 저 광택도를 유지할 수 있고, 표면의 거칠기를 일정 조도이상 크게 할 수 있도록 5.0∼15㎛ 입경의 입자를 선택 사용하고 이 입자가 들어 있는 층을 양측 표면에 적층한 3층구조의 필름을 제조함으로서 저 광택도 및 고조도를 동시에 만족하면서도 연신 공정중에서 연신성이 우수하여 연신시 파단이 없는 이축 배향 폴리에스테르 필름을 제공하게 되었다. In order to solve the problems described above, the biaxially oriented polyester film can maintain low glossiness, and select particles having a particle size of 5.0 to 15 μm so as to increase the surface roughness by a certain roughness. By manufacturing a three-layered film in which a layer containing a film was laminated on both surfaces, it satisfies both low glossiness and high roughness at the same time, and provides excellent biaxiality during the stretching process, thereby providing a biaxially oriented polyester film without breaking during stretching. .
본 발명은 상기와 같은 목적을 달성하기 위하여 1종 이상의 카르복실산 및 1종 이상의 글리콜 성분을 에스테르 반응시키고 평균 입경이 5.0∼15㎛인 입자를 첨가한후 축중합 시켜서 얻어지는 선상 폴리에스테르를 양 표층(A,C층)에 오도록 공압출하여 연신하여 제조하는 것을 큰 특징으로 하는 적층 폴리에스테르필름에 관한 것이다. 이하에서 구체적으로 설명한다.In order to achieve the above object, the present invention provides both surface layers of linear polyesters obtained by ester-reacting one or more carboxylic acids and one or more glycol components, adding particles having an average particle diameter of 5.0 to 15 µm, and then condensation-polymerizing them. The present invention relates to a laminated polyester film, which is characterized by being coextruded and stretched so as to be in (A, C layer). It demonstrates concretely below.
본 발명에서 적층에 사용된 폴리에스테르는 테레프탈산, 2,6-나프탈렌산 디카르복실산 등과 같은 방향족 디카르복실산 또는 이의 에스테르화합물과 에틸렌글리콜을 주된 출발원료로 하여 만들어지지만, 또 다른 제3성분이 사용되어질 수 있다. 이때, 본 발명의 출발 원료인, 디카르복실산 성분으로, 예를 들면, 이소프탈산, 테레프탈산, 2,6-나프탈렌디카르복실산,프탈산,아디프산, 세바틱산등의 엑시드 및 에스테르를 1종 또는 2종 이상 사용할수 있고, 글리콜성분으로서는 에틸렌글리콜, 프로필렌글리콜, 부탄디올, 1,4-사이클로헥산디메탄올, 네오펜틸글리콜 등을 1종 또는 2종이상 사용할수 있다. 그러나 본 발명에서는 반복되는 구조단위의 80% 또는 그 이상이 에틸렌테레프탈레이트 또는 에틸렌 2,6-나프탈레이트 구조로 구성된 폴리에스테르를 사용하는 것이 보다 우수한 특성을 보여준다.The polyester used for the lamination in the present invention is made from aromatic dicarboxylic acid or ester compound thereof and ethylene glycol as the main starting materials, although terephthalic acid, 2,6-naphthalene dicarboxylic acid and the like, but another third component This can be used. At this time, as the dicarboxylic acid component which is a starting material of the present invention, for example, isophthalic acid, terephthalic acid, 2,6-naphthalenedicarboxylic acid, phthalic acid, adipic acid, sebacic acid and the like and ester One or two or more kinds thereof may be used, and as the glycol component, one or two or more kinds of ethylene glycol, propylene glycol, butanediol, 1,4-cyclohexanedimethanol, neopentyl glycol, and the like may be used. However, in the present invention, it is better to use polyester composed of ethylene terephthalate or ethylene 2,6-naphthalate structure in which 80% or more of the structural units are repeated.
본 발명에 의해 제조되는 폴리에스테르는 열안정제, 산화 방지제, 대전 방지제, 자외선 흡수제등과 같은 첨가제를 포함할 수 있다.The polyester produced by the present invention may include additives such as heat stabilizers, antioxidants, antistatic agents, ultraviolet absorbers and the like.
이때, 양 표층(A,C층)의 폴리에스테르는 평균 입경이 5.0∼15㎛인 무정형 실리카 입자를 1.0∼5.0중량% 함유하고, 가운데 층(B층)은 평균 입경이 0.01∼7.0㎛이고 입자의 함량은 1.0∼3.0중량%인 것을 특징으로 한다. 평균입경이 7.0㎛ 이상인 입자를 3.0중량% 이상 지닌 폴리에스테르를 가운데 층에 적층시킬 경우에는 횡연신시에 파단을 일으키기 쉽고, 1.0중량% 이하 사용시에는 저 광택도를 얻을수 없다. 마찬가지로 0.01∼7.0㎛의 입자를 3.0중량% 이상 사용시에는 횡연신시에 파단을 일으키고 1.0중량% 이하 사용시에는 원하는 저광택도를 얻을 수 없었다. A층, C층에 사용된 입자의 크기가 5.0㎛ 이하이면 조도 및 연신에 의한 보이드가 작아져 천연 나무결 무늬의 재현이나 라벨의 독특한 색감을 표현하기 어렵고, 15㎛ 이상을 사용할시는 압출기 이후에 필터를 사용할 수 없기 때문에 미용융 폴리머, 겔을 제거할 수 없어 양질의 필름을 제조할 수 없다. 이때 A,C층 사용입자로는 무정형 실리카를 사용하고 B층의 입자는 특별히 한정하지는 않지만 탄산칼슘, 실리카, 바륨 설페이트, 카올린등을 사용하는 것이 바람직하다.At this time, the polyester of both surface layer (A, C layer) contains 1.0-5.0 weight% of amorphous silica particle whose average particle diameter is 5.0-15 micrometers, and the middle layer (layer B) has an average particle diameter of 0.01-7.0 micrometer The content of is characterized in that 1.0 to 3.0% by weight. When a polyester having 3.0 wt% or more of particles having an average particle diameter of 7.0 µm or more is laminated in the middle layer, breakage occurs easily during transverse stretching, and low glossiness cannot be obtained when using 1.0 wt% or less. Similarly, when the particle size of 0.01 to 7.0 µm is used by 3.0% by weight or more, breakage occurs in transverse stretching, and when 1.0% by weight or less is used, desired low glossiness cannot be obtained. When the size of particles used in A and C layers is 5.0 µm or less, voids due to roughness and stretching become small, making it difficult to express natural wood grain patterns or to express the unique color of labels. Since the filter cannot be used, unmelted polymers and gels cannot be removed and a good film cannot be produced. At this time, amorphous particles are used as particles for the A and C layers, and particles of the B layer are not particularly limited, but calcium carbonate, silica, barium sulfate, kaolin, or the like is preferably used.
본 발명에서의 폴리에스테르의 적층 필름의 제법은 특별히 한정된 것은 아니지만 바람직하기는 티다이(T-DIE)전 피드블록(FEED BLOCK), 혹은 티다이(T-DIE)구금내에서 A,C층 압출기 및 B층 압출기에서 공급되어지는 폴리에스테르가 A/B/C층으로 적층되어지는 방법이 좋다. 이때에 용융 시트를 40∼70℃로 냉각 고화시켜 비결정성의 미연신 적층 필름을 얻고, 이를 90∼120℃에서 3.0∼4.0배의 종방향 연신을 하고, 180∼220℃에서 3.0∼5.0배의 횡방향 연신을 한후 200∼240℃에서 열처리를 실시하여 완성된 폴리에스테르 필름을 얻는다.The production method of the laminated film of polyester in the present invention is not particularly limited, but is preferably an A, C layer extruder in a feed block before T-DIE or in a T-DIE mold. And a method in which a polyester supplied from a B-layer extruder is laminated in an A / B / C layer. At this time, the melted sheet was cooled and solidified at 40 to 70 ° C. to obtain an amorphous non-stretched laminated film, which was stretched at 90 to 120 ° C. for 3.0 to 4.0 times in the longitudinal direction, and at 180 to 220 ° C. for 3.0 to 5.0 times. After extending | stretching transversely, heat processing is performed at 200-240 degreeC, and the completed polyester film is obtained.
본 발명의 필름에 있어서, 선상 폴리에스테르 A층 및 C층의 두께는 3㎛ 이상이어야 하고, B층의 두께는 특별히 한정하지는 않지만 2.0∼300㎛가 적당하다. A층 및 C층의 두께가 3㎛ 이하인 경우에는 30% 이하의 저광택도(LOW GLOSS)를 얻을 수 없고, B층의 두께가 2.0㎛ 보다 얇으면 연신 중에 파단이 다량 발생하여 양질의 필름을 생산 할 수 없다.In the film of the present invention, the thickness of the linear polyester A layer and the C layer should be 3 µm or more, and the thickness of the B layer is not particularly limited but is preferably 2.0 to 300 µm. If the thickness of layer A and layer C is 3 µm or less, LOW GLOSS of 30% or less cannot be obtained. If the thickness of layer B is thinner than 2.0 µm, a large amount of breakage occurs during stretching to produce a good film. Can not.
다음은 본 발명의 효과를 알아보기 위한 측정 방법이다.The following is a measurement method for examining the effects of the present invention.
(1) 입자의 평균입경(1) Average particle size of particles
입자슬러리를 레이저 회절 방식의 입도 분포 측정기(COULTER LS230)을 이용하여 측정하고, 이때 입자를 구형으로 환산하여 작은 입자크기로 부터 누적한 체적이 50%가 되는 입경을 입자의 평균 입경으로 하였다. 작은 입자크기로 부터 누적한 체적이 10%, 90%를 곳이 입경을 각각 D10, D90 으로 정의한다.The particle slurry was measured using a laser diffraction particle size distribution analyzer (COULTER LS230). At this time, the average particle diameter of the particles was 50% of the cumulative volume from the small particle size. The cumulative volume is defined as D 10 and D 90 where the cumulative volume is 10% and 90% from the small particle size.
(2) 필름의 광택도(GLOSS)(2) glossiness of film (GLOSS)
BYK GARDNER사의 "MIRROR-TRI-GLOSS"를 이용하여 ASTM D523방법으로 60O。 각도에서 측정하였다.By using "MIRROR-TRI-GLOSS" of BYK GARDNER was measured at an angle of 60 ° by the ASTM D523 method.
(3) 2차원 중심선 평균 조도(Ra)(3) 2D centerline average roughness (Ra)
KOSAKA사의 "SURFACORDER SE-3400"을 이용하여 JIS B0601 방법을 사용 측정하였다.It measured using the JIS B0601 method using "SURFACORDER SE-3400" by KOSAKA.
(4) 필름의 파단 정도(4) the degree of fracture of the film
폴리에스 필름 연신 횡연신 공정시 파단 정도를 3단계로 구분하여 등급을 정하였다. The grade was determined by dividing the degree of fracture in three stages in the polyester film stretch transverse stretching process.
A등급: 4일 동안에 횡연신시 평균 1회이하의 파단 발생Grade A: Less than one failure in transverse stretching in four days
B등급: 2일 동안에 횡연신시 평균 1회이하의 파단 발생Grade B: Less than one break in transverse stretching in two days
C등급: 1일 동안에 횡연신시 1회 이상의 파단 발생Class C: one or more breaks in transverse stretching in one day
이하 실시예와 비교예를 들어 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to Examples and Comparative Examples.
실시예1∼3 비교예1∼3Examples 1-3 Comparative Examples 1-3
100중량부의 디메틸테레프탈레이트, 70중량부의 에틸렌글리콜, 0.09중량부의 망간 아세테이트사수화물과 0.04중량부의 안티몬트리옥사이이드를 반응기에 넣어 메탄올를 유출시키면서 에스테르교환반응을 시키다. 에스테르교환 반응이 끝난후 이 생성물에 0.06중량부의 트리메틸포스페이트와 표 1에 해당하는 평균입경의 입자를 해당량 만큼 에틸렌글리콜 슬러리 형태로 첨가하여 진공하에서 중축합 반응을 시켜 극한 점도가 0.65의 폴리에스테르를 얻는다.100 parts by weight of dimethyl terephthalate, 70 parts by weight of ethylene glycol, 0.09 parts by weight of manganese acetate tetrahydrate and 0.04 parts by weight of antimony trioxide were introduced into the reactor to undergo a transesterification reaction with methanol flowing out. After the transesterification reaction, 0.06 parts by weight of trimethyl phosphate and the average particle diameters of Table 1 were added in the form of ethylene glycol slurry to the polycondensation reaction under vacuum to give a polyester having an intrinsic viscosity of 0.65. Get
위에서 합성한 폴리에스테르 칩을 예비결정화한 후 170℃ 진공 건조시킨다. 각 칩은 두대의 압출기를 통하여 티다이(T-DIE) 바로 전 피드블록(FEED BLOCK)에서 A/B/C 3층으로 적층 압출하고, 냉각 드럼에서 40∼70℃로 냉각 고화시켜 비결정성의 미연신 필름을 얻고, 이를 120℃에서 4.0배의 종방향 연신을 하고, 180∼220℃에서 4.5배의 횡방향 연신을 한 후 220℃에서 열처리를 실시하여 두께가 38㎛ 이축연신 폴리에스테르 필름을 얻는다. The polyester chip synthesized above is precrystallized and then vacuum dried at 170 ° C. Each chip is extruded into two layers of A / B / C in the feed block just before T-DIE through two extruders, and cooled and solidified at 40-70 ° C. in a cooling drum. A non-oriented film was obtained, which was stretched 4.0 times in a longitudinal direction at 120 ° C., stretched 4.5 times in a lateral direction at 180 to 220 ° C., and then heat treated at 220 ° C. to obtain a 38 μm biaxially stretched polyester film. Get
표 1Table 1
상기 실시예 및 비교예에서도 확인되듯이 본 발명의 이축 배향 폴리에스테르 필름은 매트성 및 고조도에 의한 자연 나무결 무늬(WOOD GRAIN)를 재현하며 특수 색감을 부여하기 위한 라벨용에 적용시 우수한 특성을 나타내었다. As confirmed in the above examples and comparative examples, the biaxially oriented polyester film of the present invention reproduces the natural wood grain pattern (WOOD GRAIN) by matte and high roughness and has excellent characteristics when applied to a label for imparting a special color. Indicated.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| KR10-1998-0039369A KR100515795B1 (en) | 1998-09-23 | 1998-09-23 | Biaxially Oriented Polyester Laminated Film |
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| Application Number | Priority Date | Filing Date | Title |
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| KR10-1998-0039369A KR100515795B1 (en) | 1998-09-23 | 1998-09-23 | Biaxially Oriented Polyester Laminated Film |
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| Publication Number | Publication Date |
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| KR20000020666A KR20000020666A (en) | 2000-04-15 |
| KR100515795B1 true KR100515795B1 (en) | 2005-11-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20140080612A (en) * | 2012-12-12 | 2014-07-01 | 도레이첨단소재 주식회사 | A heat shrinkable stacked film and a heat shrinkable label using the same as substrate |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100477955B1 (en) * | 2002-10-17 | 2005-03-23 | 도레이새한 주식회사 | Porous polyester film |
| CN105324245B (en) * | 2013-06-18 | 2017-03-15 | 东丽株式会社 | The biaxial orientation laminated polyester film of the demoulding |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR890002297A (en) * | 1987-07-21 | 1989-04-10 | 이기동 | Manufacturing method of polyester base film |
| KR910009293A (en) * | 1989-11-14 | 1991-06-28 | 더블류. 죠지 메레디스 | Medical Suction Device |
| JPH04110147A (en) * | 1990-08-30 | 1992-04-10 | Diafoil Co Ltd | Mat laminated polyester film for molding |
| JPH04286643A (en) * | 1991-03-15 | 1992-10-12 | Toyobo Co Ltd | Polyester type resin laminated film |
| JPH05128490A (en) * | 1991-11-07 | 1993-05-25 | Diafoil Co Ltd | Laminated polyester film for magnetic recording medium |
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1998
- 1998-09-23 KR KR10-1998-0039369A patent/KR100515795B1/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR890002297A (en) * | 1987-07-21 | 1989-04-10 | 이기동 | Manufacturing method of polyester base film |
| KR910009293A (en) * | 1989-11-14 | 1991-06-28 | 더블류. 죠지 메레디스 | Medical Suction Device |
| JPH04110147A (en) * | 1990-08-30 | 1992-04-10 | Diafoil Co Ltd | Mat laminated polyester film for molding |
| JPH04286643A (en) * | 1991-03-15 | 1992-10-12 | Toyobo Co Ltd | Polyester type resin laminated film |
| JPH05128490A (en) * | 1991-11-07 | 1993-05-25 | Diafoil Co Ltd | Laminated polyester film for magnetic recording medium |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140080612A (en) * | 2012-12-12 | 2014-07-01 | 도레이첨단소재 주식회사 | A heat shrinkable stacked film and a heat shrinkable label using the same as substrate |
| KR102036377B1 (en) | 2012-12-12 | 2019-10-25 | 도레이첨단소재 주식회사 | A heat shrinkable stacked film and a heat shrinkable label using the same as substrate |
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| KR20000020666A (en) | 2000-04-15 |
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