KR100263021B1 - Polypropylene synthetic paper - Google Patents
Polypropylene synthetic paper Download PDFInfo
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- KR100263021B1 KR100263021B1 KR1019980021445A KR19980021445A KR100263021B1 KR 100263021 B1 KR100263021 B1 KR 100263021B1 KR 1019980021445 A KR1019980021445 A KR 1019980021445A KR 19980021445 A KR19980021445 A KR 19980021445A KR 100263021 B1 KR100263021 B1 KR 100263021B1
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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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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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
- 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
- B32B37/153—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 at least one layer is extruded and immediately laminated while in semi-molten state
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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
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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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- 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
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/02—Temperature
Abstract
본 발명은 공압출 2축 연신 폴리프로필렌 합성지 및 그 제조방법에 관한 것으로서, 강성 및 인열강도를 증대하고, 옵셋인쇄성을 향상하며, 수성잉크 등의 필기성 및 외관을 향상시킨 것이다.The present invention relates to a co-extruded biaxially stretched polypropylene synthetic paper and a method for manufacturing the same, which increases rigidity and tear strength, improves offset printability, and improves handwriting and appearance of aqueous ink.
본 발명은 아이소택틱 인덱스가 95％ 이상이고 멜트 인덱스가 1∼4g/10분인 결정성 폴리프로필렌 60.81∼91.7 중량％에 폴리에틸렌 20 중량％ 이하와, 평균입경 0.5∼5㎛ 인 탄산칼슘 8.5∼15 중량％와, 평균입경 0.5㎛ 이하인 이산화티타늄 3.5 중량％ 이하를 혼합한 제1수지 조성물로 된 기재층을 1차 압출기로 압출하고, 멜트 인덱스가 1∼10g/10분인 폴리프로필렌과, 5중량％ 이하의 에틸렌을 포함하는 폴리프로필렌 코 폴리머 중에서 선택되는 1종 이상 수지 40.7∼64.3 중량％에 멜트 인덱스가 0.01∼1g/10분인 폴리에틸렌 20∼34.3 중량％와, 평균입경 0.5㎛ 이하인 이산화티타늄 15.7∼25 중량％를 혼합한 제2수지 조성물을 2차 압출기로 압출한 지상층을 상기 기재층의 1면 이상에 적층되도록 T 다이에서 공압출한 후 냉각수단에 의하여 시트화하며, 상기 시트를 종방향 연신기에서 3∼5.5 배로 횡방향 연신기에서 7∼12 배로 2축 연신하여 합성지를 제조하는 것이다.In the present invention, calcium carbonate having an isotactic index of 95% or more and a melt index of 1 to 4 g / 10 min , crystalline polypropylene 60.81 to 91.7% by weight to 20% by weight or less of polyethylene and an average particle diameter of 0.5 to 5 µm A base layer made of a first resin composition containing ~ 15% by weight and 3.5% by weight or less of titanium dioxide having an average particle diameter of 0.5 µm or less is extruded with a first extruder, and a polypropylene having a melt index of 1 to 10 g / 10 minutes ; , 40.7 to 63.3% by weight of one or more resins selected from polypropylene copolymers containing 5% by weight or less of ethylene, 20 to 34.3% by weight of polyethylene having a melt index of 0.01 to 1 g / 10 minutes , and an average particle diameter of 0.5 μm. The second resin composition containing 15.7 to 25% by weight of titanium dioxide, which is mixed with the second resin composition, is extruded by a second extruder and co-extruded in a T die so as to be laminated on at least one side of the base layer, and then sheeted by cooling means. Sheet A biaxial stretching is performed 3 to 5.5 times in the longitudinal drawing machine and 7 to 12 times in the transverse drawing machine to produce synthetic paper.
Description
본 발명은 폴리프로필렌 합성지 및 그 제조방법에 관한 것이며, 더 상세하게는 라벨지, 포장지, 포스터지, 명함지 등으로 사용되는 공압출 2축 연신(共壓出 二軸 延伸) 폴리프로필렌 합성지 및 그 제조방법에 관한 것이다.The present invention relates to a polypropylene synthetic paper and a method of manufacturing the same, and more particularly, to coextruded biaxially stretched polypropylene synthetic paper used for labeling, packaging, poster paper, business card paper, etc. It is about.
주지하는 바와 같이 천연펄프로 제조된 종이대신에 폴리프로필렌의 2축 연신 필름을 기재층으로 하고, 상기 기재층의 적어도 1면 이상에 백토, 탈크, 탄산칼슘, 이산화티타늄, 규조토 등의 무기충전재 0.5∼60 중량％를 단독 또는 혼합한 폴리프로필렌 1축 연신 필름을 지상층으로 하는 합성지가 일본국 특허출원공고 소 46-40794 호 공보에 개시되어 있고, 상기한 합성지는 실용화되고 있다.As is known, instead of paper made of natural pulp, a biaxially oriented film made of polypropylene is used as a base layer, and inorganic fillers such as clay, talc, calcium carbonate, titanium dioxide, and diatomaceous earth are provided on at least one surface of the base layer. Synthetic paper using a polypropylene monoaxially oriented film obtained by mixing only -60 wt% alone or as a ground layer is disclosed in Japanese Patent Application Laid-open No. 46-40794, and the synthetic paper is put to practical use.
상기한 합성지는 지상층에 혼합된 무기충전재를 핵으로 그 주변에 미세한 기공(공극)을 형성하여 쿠션성을 가지게 함과 동시에 표면에 다수의 줄무늬상의 균열을 형성하므로서 경량이고, 인쇄잉크 건조성, 인쇄잉크 밀착성, 연필에 의한 필기성, 내수성 등이 양호한 것으로 알려졌다.The synthetic paper is lightweight by forming fine pores (voids) around the core with inorganic filler mixed in the ground layer to have cushioning properties and at the same time forming a large number of striped cracks on the surface. It is known that adhesiveness, writing property with a pencil, water resistance and the like are good.
그러나 상기한 합성지는 인장강도는 향상되지만 지상층을 1축 연신하기 때문에 인열강도가 취약하게 되고, 또한 지상층에 혼합하는 무기충전재는 미세기공의 형성을 많게 하기 위하여서는 그 입경을 크게 하여야 하므로 지분이 많이 발생하기 때문에 특히 옵셋인쇄시에 잉크전이에 의한 얼룩이 생기고, 수성잉크를 사용하는 스탬프 또는 수성펜의 사용시에 그 색상 및 모양이 화려하지 못하기 때문에 지상층의 상면에 별도의 도포제를 도포하고 있다.However, the above-mentioned synthetic paper improves tensile strength but uniaxially stretches the ground layer, so that the tear strength becomes weak. Also, the inorganic filler mixed in the ground layer has to have a large particle size in order to increase the formation of micropores. Since a large number of occurrences occur, in particular, stains are caused by ink transition during offset printing, and color and shape of the ink or ink pen using water-based ink are not brilliant. Therefore, a separate coating agent is applied to the upper surface of the ground layer.
또한 상기한 합성지는 기재층을 압출하여 종방향(길이방향)으로 연신한 후 그 일면이상에 지상층을 압출 적층한 후 횡방향으로 연신하는 것이므로 지상층의 박리현상이 발생하고, 제조설비가 복잡한 문제점이 있는 것이다.In addition, the above-mentioned synthetic paper is extruded and stretched in the longitudinal direction (lengthwise direction) of the base layer, and then extruded and laminated on the ground layer on one or more surfaces thereof, and then stretched in the transverse direction. It is.
상기한 실정을 감안한 공압출 2축 연신 합성지 제조방법이 미국특허 제 5,552,011 호 공보에 개시되어 있는 바, 상기한 공압출 2축 연신 합성지 제조방법은 아이소택틱 인덱스가 97％ 이상인 고결정 폴리프로필렌 70∼80 중량％에 탄산칼슘 마스터 수지 10∼14 중량％와, 이산화티타늄 마스터 수지 9∼13 중량％ 및 대전방지제 1∼3 중량％를 혼합한 제1수지 조성물로 된 기재층을 1차 압출기로 압출하고, 폴리프로필렌 30∼55 중량％에 폴리에틸렌 30∼40 중량％와, 이산화티타늄 마스터 수지 14∼20 중량％와, 대전방지제 0.5∼2 중량％ 등을 혼합한 제2수지 조성물로 된 지상층을 제2압출기로 압출한 후 기재층의 양면에 지상층이 위치되도록 T 다이에 의하여 공압출한 후 캐스팅롤에서 시트화하고 상기 시트를 종방향 및 횡방향으로 연신하며, 연신후에 코로나 방전처리를 한 것이다.In view of the above situation, a method of manufacturing coextruded biaxially stretched synthetic paper is disclosed in US Patent No. 5,552,011. The method of preparing coextruded biaxially stretched synthetic paper has a polycrystalline polypropylene 70 having an isotactic index of 97% or more. Extruded the base material layer of the 1st resin composition which mixed 10-14 weight% of calcium carbonate master resins, 9-13 weight% of titanium dioxide master resins, and 1-3 weight% of antistatic agents with -80 weight% with a 1st extruder. And a ground layer made of a second resin composition in which 30 to 55% by weight of polypropylene, 30 to 40% by weight of polyethylene, 14 to 20% by weight of titanium dioxide master resin, 0.5 to 2% by weight of an antistatic agent, and the like were mixed. After extruding with an extruder, co-extruded by T-die so that the ground layer is located on both sides of the base layer, and then sheeted in a casting roll, the sheet is stretched in the longitudinal and transverse directions, and after stretching, corona discharge Lee is one.
그러나 상기한 공압출 2축 연신 합성지는 지상층의 박리현상이 발생하지 않고 인열강도가 증대되며, 제조설비를 간단화한 장점은 있으나, 지상층에 미세기공이 형성되기 때문에 지분의 발생이 심하므로서 옵셋인쇄시에 잉크전이에 의한 얼룩이 발생하여 인쇄성이 떨어지고, 수성잉크 등의 필기성 및 외관이 양호하지 못한 문제점이 있게 되는 것이다.However, the coextruded biaxially stretched synthetic paper has the advantage that tear strength is increased without peeling of the ground layer, and the manufacturing facility is simplified. When printing, unevenness occurs due to ink transition, resulting in poor printability and poor writing and appearance of aqueous ink.
본 발명은 상기한 문제점을 시정하여, 강성 및 인열강도를 증대하고, 옵셋인쇄성을 향상하며, 수성잉크 등의 필기성 및 외관을 향상시킨 폴리프로필렌 합성지 및 그 제조방법을 제공하는 것을 목적으로 한다.SUMMARY OF THE INVENTION An object of the present invention is to provide a polypropylene synthetic paper and a method of manufacturing the same, by correcting the above problems, increasing rigidity and tear strength, improving offset printability, and improving the writing and appearance of aqueous ink and the like. do.
상기한 목적을 달성하기 위하여, 본 발명의 폴리프로필렌 합성지는 아이소택틱 인덱스가 95％ 이상이고, 멜트 인덱스가 1∼4g/10분인결정성 폴리프로필렌 60.81∼91.7 중량％에 폴리에틸렌 20 중량％ 이하와, 평균입경 0.5∼5㎛인 탄산칼슘 8.5∼15 중량％와, 평균입경 0.5㎛ 이하인 이산화티타늄 3.5 중량％ 이하를 혼합한 제1수지 조성물을 1차 압출기로 압출하여 기재층으로하고, 멜트 인덱스가 1∼10g/10분인 폴리프로필렌과 5 중량％ 이하의 에틸렌을 포함하는 폴리프로필렌 코 폴리머 중에서 선택되는 1종 이상의 수지 40.7∼64.3 중량％에 멜트 인덱스가 0.01∼1g/10분인 폴리에틸렌 20∼34.3 중량％와, 평균입경 0.5㎛ 이하인 이산화티타늄 15.7∼25 중량％를 혼합한 제2수지 조성물을 2차 압출기로 압출한 지상층을 상기 기재층의 1면 이상에 적층되도록 T 다이에서 공압출한 후 2축 연신하여서 된 것이다.In order to achieve the above object, the polypropylene synthetic paper of the present invention has an isotactic index of 95% or more, and a melt index of 1 to 4 g / 10 min crystalline polypropylene of 60.81 to 91.7% by weight of 20% by weight of polyethylene The first resin composition mixed with 8.5-15 wt% of calcium carbonate having an average particle diameter of 0.5 to 5 μm and 3.5 wt% or less of titanium dioxide having an average particle diameter of 0.5 μm or less is extruded with a primary extruder to form a base layer, and melted. Melt index is 0.01-1 g / 10 minutes in 40.7-64.3 weight% of 1 or more types of resin chosen from the polypropylene which has an index of 1-10 g / 10 minute , and the polypropylene copolymer containing 5 weight% or less of ethylene. T die so that a ground layer extruded with a second extruder of a second resin composition mixed with 20 to 34.3 wt% polyethylene and 15.7 to 25 wt% titanium dioxide having an average particle diameter of 0.5 μm or less is laminated on at least one surface of the base layer. It was made by biaxial stretching after coextrusion at.
또한 본 발명의 폴리프로필렌 합성지 제조방법은 아이소택틱 인덱스가 95％ 이상이고 멜트 인덱스가 1∼4g/10분인 결정성 폴리프로필렌 60.81∼91.7 중량％에 폴리에틸렌 20 중량％ 이하와, 평균입경 0.5∼5㎛인 탄산칼슘 8.5∼15 중량％와, 평균입경 0.5㎛ 이하인 이산화티타늄 3.5 중량％ 이하를 혼합한 제1수지 조성물로 된 기재층을 1차 압출기로 압출하고, 멜트 인덱스가 1∼10g/10분인 폴리프로필렌과 5 중량％ 이하의 에틸렌을 포함하는 폴리프로필렌 코 폴리머 중에서 선택되는 1종 이상의 수지 40.7∼64.3 중량％에 멜트 인덱스가 0.01∼1g/10분인 폴리에틸렌 20∼34.3 중량％와, 평균입경 0.5㎛ 이하인 이산화티타늄 15.7∼25 중량％를 혼합한 제2수지 조성물로 된 지상층을 2차 압출기로 압출한 후 상기 기재층의 1면 이상에 지상층이 적층되도록 T 다이에서 공압출하여 냉각수단에 의하여 시트화하며, 상기 시트를 종방향 연신기에서 3∼5.5 배로 횡방향 연신기에서 7∼12 배로 2축 연신하여 합성지를 제조하여서 된 것이다.In addition, the method for producing polypropylene synthetic paper of the present invention is 60.81 to 91.7 wt% of crystalline polypropylene having an isotactic index of 95% or more and a melt index of 1 to 4 g / 10 min , 20 wt% or less of polyethylene, and an average particle diameter of 0.5. A substrate layer made of a first resin composition containing 8.5-15 wt% of calcium carbonate having a thickness of ˜5 μm and 3.5 wt% or less of titanium dioxide having an average particle diameter of 0.5 μm or less is extruded with a primary extruder, and the melt index is 1-10 g. 40.7 to 63.3% by weight of at least one resin selected from polypropylene copolymer containing 10 minutes of polypropylene and 5% by weight or less of ethylene and 20 to 34.3% by weight of polyethylene having a melt index of 0.01 to 1 g / 10 minutes . And extruding the ground layer of the second resin composition containing 15.7 to 25% by weight of titanium dioxide having an average particle diameter of 0.5 µm or less with a second extruder, and then in a T die so that the ground layer is laminated on at least one surface of the substrate layer. Extruded and sheeted by a cooling means, the sheet is a species from 3 to 5.5 times the transverse stretching machine in the direction stretching machine to 7 to 12 times the biaxially oriented hayeoseo manufacturing a synthetic paper.
본 발명의 합성지의 두께는 30∼120㎛로 형성하고, 지상층의 두께는 2.5∼18㎛로 형성하는 것이다.The thickness of the synthetic paper of this invention is formed in 30-120 micrometers, and the thickness of a ground layer is formed in 2.5-18 micrometers.
본 발명의 합성지의 기재층에는 평균입경 0.5∼5㎛ 인 탄산칼슘 8.5∼15 중량％와 평균입경 0.5㎛ 이하인 이산화티타늄 3.5 중량％ 이하가 혼합되는 바, 탄산칼슘의 평균입경이 0.5㎛ 이하인 경우에는 미세기공의 생성이 불충분하므로 쿠션성이 낮게 되고, 5㎛ 이상인 경우에는 기공이 너무 크게 되어 불투명성은 증대되나 인장강도 및 인열강도가 저하되는 것이다.When the average particle diameter of calcium carbonate is 0.5 micrometer or less, the base material layer of the synthetic paper of this invention mixes 8.5-15 weight% of calcium carbonates with an average particle diameter of 0.5-5 micrometers, and 3.5 weight% or less of titanium dioxide with an average particle diameter of 0.5 micrometer or less. Since the formation of micropores is insufficient, the cushioning property is low, and in the case of 5 µm or more, the pores are too large to increase the opacity, but the tensile strength and tearing strength are lowered.
또한 탄산칼슘과 이산화티타늄의 합계가 8.5 중량％ 이하인 경우에는 균일한 기공의 발생이 어렵고, 18.5 중량％ 이상인 경우에는 연신성이 나쁘게 되고 강도가 낮아지는 것이다.In the case where the sum total of calcium carbonate and titanium dioxide is 8.5% by weight or less, it is difficult to generate uniform pores, and when 18.5% or more by weight, the elongation is poor and the strength is low.
본 발명의 합성지의 지상층에는 평균입경 0.5㎛ 이하인 이산화티타늄을 혼합하여 기공의 발생을 방지하거나 거의 발생되지 않도록 하므로서 백색도를 향상하고 지분의 발생을 방지하며 강도를 증대시키는 것이므로 이산화티타늄의 평균입경이 0.5㎛ 이상인 것은 혼합을 하지 않아야 한다.In the ground layer of the synthetic paper of the present invention, titanium dioxide having an average particle diameter of 0.5 μm or less is mixed to prevent or hardly generate pores, thereby improving whiteness, preventing the occurrence of equity, and increasing strength, so that the average particle diameter of titanium dioxide is 0.5. Anything larger than 탆 should not be mixed.
도 1은 본 발명의 실시예의 확대 단면도1 is an enlarged cross-sectional view of an embodiment of the present invention.
도 2는 본 발명의 실시예의 제조공정도2 is a manufacturing process diagram of an embodiment of the present invention
〈 도면의 주요 부분에 대한 부호의 설명 〉<Description of the code | symbol about the principal part of drawing>
1 : 합성지 2 : 기재층 3, 3' : 지상층DESCRIPTION OF SYMBOLS 1 synthetic paper 2 base material layer 3, 3 'ground layer
도 1은 본 발명의 실시예에 의한 폴리프로필렌 합성지의 확대 단면도로서, 1 은 합성지이고, 2는 기재층이며, 3, 3'는 지상층이다.1 is an enlarged cross-sectional view of a polypropylene synthetic paper according to an embodiment of the present invention, where 1 is a synthetic paper, 2 is a substrate layer, and 3, 3 'is a ground layer.
상기한 기재층(2)은 아이소택틱 인덱스가 95％ 이상이고, 멜트 인덱스(M.1)가 1∼4g/10분인 결정성 폴리프로필렌 60.81∼91.7 중량％에 폴리에틸렌 20 중량％ 이하와, 평균입경 0.5∼5㎛ 인 탄산칼슘 8.5∼15 중량％와, 평균입경 0.5㎛ 이하인 이산화티타늄 3.5 중량％ 이하를 혼합한 제1수지 조성물을 1차 압출기로 압출한 것이다.The base material layer 2 has an isotactic index of 95% or more and a melt index (M.1) of 1 to 4 g / 10 min . The 1st resin composition which mixed 8.5-15 weight% of calcium carbonates with an average particle diameter of 0.5-5 micrometers, and 3.5 weight% or less of titanium dioxide of an average particle diameter of 0.5 micrometers or less is extruded with a primary extruder.
상기한 지상층(3)(3')은 멜트 인덱스(M.1) 1∼10g/10분인 폴리프로필렌과 5 중량％ 이하의 에틸렌을 포함하는 폴리프로필렌 코 폴리머 중에서 선택되는 1종 이상의 수지 40.7∼64.3 중량％에 멜트 인덱스가 0.01∼1g/10분인 폴리에틸렌 20∼34.3 중량％와, 평균입경 0.5㎛ 이하인 이산화티타늄 15.7∼25 중량％를 혼합한 제2수지 조성물을 2차 압출기로 압출한 것이다.The above ground layer (3) (3 ') is at least one resin selected from polypropylene having a melt index (M.1) of 1 to 10 g / 10 min and a polypropylene copolymer comprising 5 wt% or less of ethylene. The second resin composition, in which 20 to 34.3 wt% of polyethylene having a melt index of 0.01 to 1 g / 10 min and 15.7 to 25 wt% of titanium dioxide having an average particle diameter of 0.5 μm or less, was extruded by a second extruder will be.
상기와 같이 압출된 기재층(2)과 지상층(3)(3')은 지상층(3)(3')이 기재층(2)의 양면에 위치하도록 T 다이를 통하여 공압출한 후 캐스팅롤 등의 냉각수단에 의하여 시트화한 후 종방향 연신기와 횡방향 연신기에 의하여 2축 연신하고 코로나 방전처리를 하여서 합성지를 형성한 것이며, 상기 지상층(3)(3')은 인쇄면이 1면 일때에는 기재층(2)의 1면에만 형성하고 다른 면에는 올레핀계수지만으로 된 보호층을 형성한다.The substrate layer 2 and the ground layer 3, 3 'extruded as described above are co-extruded through a T die such that the ground layer 3, 3' is located on both sides of the substrate layer 2, and then a casting roll or the like. After the sheet was formed by the cooling means of biaxial stretching by the longitudinal stretching machine and the transverse stretching machine and corona discharge treatment to form a synthetic paper, and the ground layer (3) (3 ') when the printing surface is one side It forms only on one side of the base material layer 2, and forms the protective layer which consists only of an olefin resin on the other side.
상기한 본 발명의 합성지는 도 2의 제조공정에 의하여 제조하는 바, 상기 제1수지 조성물을 200∼270℃로 설정된 제1압출기(11)에서 기재층(2)을 압출하고, 상기 제2수지 조성물을 제1압출기와 동일한 온도로 설정된 제2압출기(12)(12')에서 지상층(3)(3')을 압출하며, 지상층(3)(3')을 기재층(2)의 일면에만 적층할 때에는 제2압출기(12)(12')중 어느 하나는 올레핀계수지만으로 보호층을 압출한다.As described above, the synthetic paper of the present invention is manufactured by the manufacturing process of FIG. 2, and the base resin layer 2 is extruded from the first extruder 11 having the first resin composition set at 200 to 270 ° C., and the second resin Extrude the ground layers 3, 3 'from the second extruder 12, 12' with the composition set at the same temperature as the first extruder, and the ground layers 3, 3 'only on one side of the substrate layer 2 When laminating | stacking, any one of the 2nd extruder 12 (12 ') extrudes a protective layer only by an olefin count.
상기와 같이 압출된 기재층(2)과 지상층(3)(3')을 T 다이(13)를 통하여 공압출한 후 캐스팅롤, 수조 등의 냉각수단(14)에서 25∼70℃를 유지하면서 시트화하고, 종방향(길이방향)연신기(15)에서 각각의 롤의 온도를 100∼145℃를 유지하면서 3∼5.5 배로 연신하며, 다시 텐터식 등의 횡방향 연신기(16)의 온도를 150∼180℃를 유지하면서 7∼12 배로 연신한 후 코로나 방전수단(17)에 의하여 36 dyne/㎝ 이상의 코로나 방전처리를 하여 합성지의 제조를 완료하는 것이다.The substrate layer 2 and the ground layer 3, 3 'extruded as described above are co-extruded through the T die 13, and then maintained at 25 to 70 DEG C in cooling means 14 such as a casting roll and a water bath. The sheet is stretched and stretched by 3 to 5.5 times while maintaining the temperature of each roll in the longitudinal (longitudinal) stretching machine 15 while maintaining the temperature of 100 to 145 占 폚, and the temperature of the transverse stretching machine 16 such as tenter type. Is stretched 7 to 12 times while maintaining 150 to 180 DEG C, and then corona discharge treatment of 36 dyne / cm or more is completed by the corona discharge means 17 to complete the production of synthetic paper.
실시예 1Example 1
아이소택틱 인덱스가 96％이고, 멜트 인덱스가 1.8g/10분인 폴리프로필렌 82.6 중량％에 평균입경 3㎛ 인 탄산칼슘 14 중량％와, 평균입경 0.2㎛ 인 이산화티타늄 3 중량％ 및 대전방지제 0.4 중량％를 혼합한 제1수지 조성물로 된 기재층을 240℃로 설정된 제1압출기에서 압출하고, 멜트 인덱스가 3g/10분인 폴리프로필렌 52.4 중량％에 폴리에틸렌 27.6 중량％ 및 평균입경 0.3㎛ 인 이산화티타늄 20 중량％를 혼합한 제2수지 조성물로 된 지상층을 250℃로 설정된 제2압출기에서 압출하여 기재층의 양면에 지상층이 적층되도록 T 다이에서 공압출한 후 캐스팅롤에서 30℃를 유지 냉각하면서 시트화하고, 상기 시트를 종방향 연신기에서 각각의 롤의 온도를 110℃를 유지하면서 4배로 연신하며, 다시 텐터식 횡방향 연신기에서 160℃를 유지하면서 8배로 연신하고 40 dyne/㎝ 코로나 방전처리를 하여서, 양지상층의 각 두께 15㎛ 및 기재층 두께 30㎛의 합성지를 제조하였다.14% by weight of calcium carbonate having an average particle diameter of 3 μm, 8% by weight of polypropylene having an isotactic index of 96% and a melt index of 1.8 g / 10 min , 3% by weight of titanium dioxide having an average particle diameter of 0.2 μm, and an antistatic agent 0.4 The base layer of the first resin composition mixed with the weight% was extruded in a first extruder set at 240 ° C., and the melt index was 52.4% by weight of polypropylene having a 3g / 10 minute melt ratio of 27.6% by weight of polyethylene and 0.3 μm in average particle diameter. Extrusion of the ground layer of the second resin composition containing 20% by weight of titanium dioxide in a second extruder set at 250 ° C., followed by co-extrusion in a T die so that the ground layer is laminated on both sides of the substrate layer, and then maintained at 30 ° C. on a casting roll. While sheeting, the sheet is drawn four times the temperature of each roll in the longitudinal stretching machine while maintaining 110 ℃, stretched eight times while maintaining 160 ℃ in a tenter-type transverse stretching machine and 40 A dyne / cm corona discharge treatment was performed to prepare synthetic paper having a thickness of 15 μm and a base layer thickness of 30 μm.
실시예 2Example 2
아이소텍틱 인덱스가 98％이고 멜트 인덱스가 2.5g/10분인 폴리프로필렌 89.5 중량％에 평균입경 3㎛인 탄산칼슘 9.8 중량％ 및 대전방지제 0.7 중량％를 혼합한 제1수지 조성물로 된 기재층을 230℃로 설정된 제1압출기에서 압출하고, 3 중량％의 에틸렌을 포함하는 폴리프로필렌 코 폴리머 36 중량％와, 폴리에틸렌 18 중량％ 및 평균입경 0.2㎛ 인 이산화티타늄 21 중량％를 혼합한 제2수지 조성물로 된 지상층을 230℃로 설정된 제2압출기에서 압출하여 기재층의 1면에 지상층과 타면에 보호층이 적층되도록 T 다이에서 공압출한 후 상기 제1실시예와 같이 냉각, 종방향 연신, 횡방향 연신 및 코로나 방전처리를 하여 지상층 및 보호층의 두께가 10㎛ 이고 기재층의 두께가 60㎛ 인 합성지를 제조하였다.Substrate layer made of a first resin composition comprising 89.5% by weight of polypropylene having an isotactic index of 98% and a melt index of 2.5 g / 10 minutes , 9.8% by weight of calcium carbonate having an average particle diameter of 3 μm, and 0.7% by weight of an antistatic agent. Is extruded in a first extruder set at 230 ° C., a second resin obtained by mixing 36% by weight of polypropylene copolymer containing 3% by weight of ethylene with 18% by weight of polyethylene and 21% by weight of titanium dioxide having an average particle diameter of 0.2 μm. Extrusion of the ground layer of the composition in a second extruder set to 230 ℃ by co-extrusion in a T die so that the protective layer is laminated on one side of the base layer and the other layer on the base layer, and then cooled, longitudinally stretched, as in the first embodiment Lateral stretching and corona discharge treatment were performed to prepare synthetic paper having a thickness of the ground layer and the protective layer of 10 µm and a thickness of the substrate layer of 60 µm.
실시예 3Example 3
아이소택틱 인덱스가 96％이고 멜트 인덱스 2.1g/10분인 폴리프로필렌 72.7 중량％에 폴리에틸렌 10 중량％와, 평균입경 2㎛ 인 탄산칼슘 14 중량％와, 평균입경 0.2㎛ 인 이산화티타늄 3.3 중량％를 혼합한 제1수지 조성물로 된 기재층을 250℃로 설정된 제1압출기에서 압출하고, 멜트 인덱스가 5g/10분인 폴리프로필렌 54 중량％에 폴리에틸렌 30 중량％ 및 평균입경 0.4㎛ 인 이산화티타늄 16 중량％를 혼합한 제2수지 조성물로 된 지상층을 250℃로 설정된 제2압출기에서 압출하여 기재층의 양면에 지상층이 적층되도록 T 다이에서 공압출한 후 상기 제1실시예와 같이 냉각, 종방향연신, 횡방향 연신 및 코로나 방전처리를 하여 지상층의 각 두께 18㎛, 기재층의 두께 44㎛의 합성지를 제조하였다.72.7% by weight of polypropylene having an isotactic index of 96% and a melt index of 2.1 g / 10 minutes , 10 % by weight of polyethylene, 14% by weight of calcium carbonate having an average particle diameter of 2 µm, and 3.3% by weight of titanium dioxide having an average particle diameter of 0.2 µm. The base layer of the first resin composition containing the mixture was extruded in a first extruder set at 250 ° C., and titanium dioxide having a melt index of 5 g / 10 min . Polypropylene having 54 wt% of polypropylene and 30 wt% polyethylene and an average particle diameter of 0.4 μm. Extrusion of the ground layer of the second resin composition mixed with 16% by weight in a second extruder set at 250 ° C., followed by co-extrusion in a T die so that the ground layer is laminated on both sides of the substrate layer, is then cooled and cooled as in the first embodiment. Directional stretching, transverse stretching and corona discharge treatment were carried out to prepare synthetic paper having a thickness of 18 µm in the ground layer and 44 µm in thickness of the base layer.
상기한 실시예의 합성지의 시험결과는 표 1과 같다.The test results of the synthetic paper of the above embodiment are shown in Table 1.
주 1. 박리강도는 접착테이프로 박리시킬경우의 접착력이며, 0 는 박리되지 않는 것을 나타냄Note 1. Peel strength is the adhesive strength when peeling off with adhesive tape, and 0 indicates no peeling off.
2. 지분발생량은 고무로서 50회 문지른 후의 무게 감소량(㎎/㎡)을 나타내는 것이고, - 는 지분이 전혀 발생하지 않은 것임2. Equity generation amount represents the amount of weight loss (mg / ㎡) after rubbing 50 times as rubber, and-no equity is generated.
이상과 같이 본 발명은 기재층과 지상층의 주재료를 고결정 폴리프로필렌으로 하고 기재층에 평균입경 3㎛ 인 탄산칼슘 등을 혼합하여 미세기공을 형성하며, 지상층에 평균입경 0.5㎛ 이하인 이산화티타늄을 혼합하여 기공의 발생을 방지하거나 거의 발생되지 않도록 함과 동시에 공압출 2축 연신하므로서 강성 및 인열강도를 증대하고, 지분의 발생을 억제하므로서 옵셋인쇄시에 잉크전이에 의한 얼룩의 발생이 방지되어 인쇄성이 향상되고 수성잉크 등의 사용시에도 그 색상 및 모양이 화려하고 필기성도 양호하며, 외관이 양호한 것이다.As described above, in the present invention, the main material of the base layer and the ground layer is made of high crystalline polypropylene, and the microporous is formed by mixing calcium carbonate having an average particle diameter of 3 μm in the base layer, and mixing titanium dioxide having an average particle diameter of 0.5 μm or less in the ground layer. This prevents the occurrence of pores or hardly occurs, and increases the stiffness and tear strength by co-extrusion biaxial stretching, and suppresses the occurrence of equity, thereby preventing the occurrence of spots due to ink transfer during offset printing. When the ink is improved, the color and shape thereof are brilliant, the handwriting is good, and the appearance is good even when the water-based ink is used.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980021445A KR100263021B1 (en) | 1998-06-10 | 1998-06-10 | Polypropylene synthetic paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980021445A KR100263021B1 (en) | 1998-06-10 | 1998-06-10 | Polypropylene synthetic paper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20000001263A KR20000001263A (en) | 2000-01-15 |
| KR100263021B1 true KR100263021B1 (en) | 2000-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019980021445A KR100263021B1 (en) | 1998-06-10 | 1998-06-10 | Polypropylene synthetic paper |
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| Country | Link |
|---|---|
| KR (1) | KR100263021B1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030067968A (en) * | 2002-02-09 | 2003-08-19 | 주식회사 오광 | A film for polystyrene sheet coating |
| CN103448332B (en) * | 2013-09-03 | 2015-10-07 | 昆明钢铁控股有限公司 | Stone paper of a kind of low-density high-tension and preparation method thereof |
| CN103448331B (en) * | 2013-09-03 | 2016-05-18 | 昆明钢铁控股有限公司 | A kind of easily recyclable paper wood of degraded and application thereof |
-
1998
- 1998-06-10 KR KR1019980021445A patent/KR100263021B1/en not_active IP Right Cessation
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| Publication number | Publication date |
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| KR20000001263A (en) | 2000-01-15 |
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