KR102152264B1 - Recyclable dampproof kraft paper and preparation of sugar sack by using it - Google Patents

Recyclable dampproof kraft paper and preparation of sugar sack by using it Download PDF

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KR102152264B1
KR102152264B1 KR1020190079208A KR20190079208A KR102152264B1 KR 102152264 B1 KR102152264 B1 KR 102152264B1 KR 1020190079208 A KR1020190079208 A KR 1020190079208A KR 20190079208 A KR20190079208 A KR 20190079208A KR 102152264 B1 KR102152264 B1 KR 102152264B1
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weight
kraft
moisture
paper
proof
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정명균
장두현
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부인산업(주)
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    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00Coated paper; Coating material
    • D21H19/72Coated paper characterised by the paper substrate
    • D21H19/74Coated paper characterised by the paper substrate the substrate having an uneven surface, e.g. crêped or corrugated paper
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38Packaging materials of special type or form
    • B65D65/42Applications of coated or impregnated materials
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D125/00Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
    • C09D125/02Homopolymers or copolymers of hydrocarbons
    • C09D125/04Homopolymers or copolymers of styrene
    • C09D125/08Copolymers of styrene
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D133/00Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04Homopolymers or copolymers of esters
    • C09D133/06Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09D133/10Homopolymers or copolymers of methacrylic acid esters
    • C09D133/12Homopolymers or copolymers of methyl methacrylate
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D183/00Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04Polysiloxanes
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/20Diluents or solvents
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/60Additives non-macromolecular
    • C09D7/61Additives non-macromolecular inorganic
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00Coated paper; Coating material
    • D21H19/10Coatings without pigments
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/80Packaging reuse or recycling, e.g. of multilayer packaging

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)

Abstract

The present invention relates to recyclable damp-proof kraft paper and a sugar sack preparation method using the same. More specifically, one surface or both surfaces of kraft raw paper is coated with a damp-proof layer formed of a coating agent composition having a glass transition temperature (Tg) of -40 to -30°C and containing: 40 to 50 wt% of styrene acrylic emulsion; 35 to 45 wt% of water; 5 to 10 wt% of physical property supplement; 3 to 10 wt% of humectant; 1 to 3 wt% of a leveling agent; and 0.5 to 1 wt% of an antifoaming agent.

Description

재활용이 용이한 크라프트 방습지 및 이를 이용한 설탕지대의 제조방법{Recyclable dampproof kraft paper and preparation of sugar sack by using it}Recyclable dampproof kraft paper and preparation of sugar sack by using it}

본 발명은 재활용이 용이한 크라프트 방습지 및 이를 이용한 설탕지대의 제조방법에 관한 것으로, 좀 더 상세하게 설명하자면, 크라프트 원지의 일면 또는 양면에, 스티렌 아크릴 에멀젼 40~50중량%와; 물 35~45중량%와; 물성보완제 5~10중량%와; 습윤제 3~10중량%와; 레벨링제 1~3중량%와; 소포제 0.5~1 중량%를 포함하고, 유리전이온도(Tg)가 -40℃ ~ -30℃인 코팅제 조성물로 이루어진 방습층이 코팅되어 있는 크라프트 방습지 및 이를 이용한 설탕지대의 제조방법에 관한 것이다.The present invention relates to an easily recyclable kraft moisture-proof paper and a method of manufacturing a sugar bag using the same, and to describe in more detail, on one or both sides of the kraft base paper, 40 to 50% by weight of styrene acrylic emulsion; 35 to 45% by weight of water; 5 to 10% by weight of a physical property supplement; 3 to 10% by weight of a wetting agent; 1 to 3% by weight of a leveling agent; It relates to a kraft moisture-proof paper coated with a moisture-proof layer made of a coating composition comprising 0.5 to 1% by weight of an antifoaming agent and a glass transition temperature (Tg) of -40°C to -30°C, and a method of manufacturing a sugar bag using the same.

크라프트지(kraft paper)는 화학펄프의 일종인 미표백 크라프트 펄프를 주원료로 하는 황갈색의 종이로서, 질기고 튼튼하며 표면이 미끄럽지 않고, 친환경적이라는 장점이 있어서 오래 전부터 시멘트나, 비료, 사료, 곡물, 설탕, 제분 등의 포장용 지대(紙袋)로 널리 사용되고 있다. 그런데 이러한 크라프트지는 그 소재적 특성상 습기에 취약한 단점이 있기 때문에 이를 설탕이나 제분 등 식품재료용 지대로 사용하기 위해서는 습기를 차단하는 방습처리를 해야 한다. Kraft paper is a yellowish brown paper made mainly of unbleached kraft pulp, a kind of chemical pulp, and has the advantage of being tough and strong, not slippery, and eco-friendly, so it has long been used for cement, fertilizer, feed, grain, etc. It is widely used as a packaging area for sugar and milling. However, since such kraft paper is vulnerable to moisture due to its material characteristics, in order to use it as a zone for food materials such as sugar or milling, it must be subjected to moisture-proof treatment to block moisture.

종래에 크라프트지를 방습 처리하는 가장 일반적인 방법은 크라프트 원지에 폴리에틸렌(PE)이나 폴리프로필렌(PP), 폴리염화비닐리덴(PVDC) 등의 폴리올레핀계 필름을 라미네이팅(laminating)하여 방습지를 제조하는 방법이다. 그러나 이러한 방법으로 제조되는 라미네이티드 크라프트 방습지는 충분한 방습 효과를 얻을 수 는 있지만, 물에 의한 해리(解離)가 잘 되지 않기 때문에 폴리머 재질과 펄프 재질을 분리하여 재활용하기가 어렵고, 따라서 폐기물을 소각하거나 매립 처리하는 과정에서 각종 환경오염을 야기하는 문제점이 있었다. Conventionally, the most common method of moisture-proofing kraft paper is a method of manufacturing a moisture-proof paper by laminating a polyolefin-based film such as polyethylene (PE), polypropylene (PP), and polyvinylidene chloride (PVDC) on the kraft base paper. However, although the laminated kraft moisture-proof paper produced in this way can obtain sufficient moisture-proof effect, it is difficult to separate and recycle the polymer material and pulp material because it is not easily dissociated by water. Therefore, waste is incinerated. There was a problem of causing various environmental pollution in the process of landfill or landfill treatment.

이러한 문제점을 해소하기 위하여 종래에도 아크릴 에멀젼을 이용하여 크라프트 방습지의 해리성을 개선하려는 노력들이 시도되어 왔다. 예를 들면, 특허 제10-168974호(1998.10.08.)에는 유리전이온도(Tg)가 25~70℃ 범위에 있는 아크릴계 에멀젼 90~50 중량부와, 연화점이 90~110℃ 범위에 있는 로진변성 왁스계 에멀젼 10~50 중량부와, 미끄럼 방지와 블로킹 방지를 위해 무기질 분체 5~20 중량부를 포함하는 도공액 조성물을 도포한 방습지가 소개되어 있다. In order to solve this problem, efforts have been made to improve the dissociation property of kraft moisture-proof paper by using acrylic emulsion. For example, Patent No. 10-168974 (October 08, 1998) describes 90 to 50 parts by weight of an acrylic emulsion with a glass transition temperature (Tg) in the range of 25 to 70°C, and a rosin with a softening point in the range of 90 to 110°C. Moisture-proof paper coated with a coating liquid composition containing 10 to 50 parts by weight of a modified wax-based emulsion and 5 to 20 parts by weight of an inorganic powder to prevent slipping and blocking is introduced.

상기 방습지는 재활용을 위한 해리성이 개선된 효과는 있으나, 이를 설탕지대로 사용할 경우, 상기 무기질 분체가 설탕 성분 속으로 함입될 우려가 있고, 상기 왁스계 에멀젼으로 인해서 지대 표면이 너무 미끄러워서 취급이 용이하지 못한 단점이 있기 때문에 식품용 지대로 사용하기에는 적합하지 않다.The moisture-proof paper has the effect of improving dissociation for recycling, but when it is used as a sugar zone, there is a risk that the inorganic powder may be incorporated into the sugar component, and the surface of the zone is too slippery due to the wax-based emulsion, so handling is difficult. It is not suitable for use as a food zone because it is not easy to use.

또한 특허 제10-537733호(2005.12.13.)에는 크라프트 원지의 상면에 언더 코팅층과 탑 코팅층을 차례로 도포하되, 상기 언더 코팅층은, 무기안료와 아크릴 에멀젼의 혼합액이 도공량 5∼15 g/㎡ 로 도포되고, 상기 탑 코팅층은 아크릴 에멀전과 왁스 에멀젼의 혼합액이 도공량 5∼15g/m2 로 도공되어 있는 재생 가능한 크라프트 방습지가 소개되어 있다.In addition, in Patent No. 10-537733 (December 13, 2005), an undercoat layer and a top coat layer are sequentially applied to the upper surface of the kraft paper, but the undercoat layer is a mixture of inorganic pigments and acrylic emulsion with a coating amount of 5 to 15 g/m². Renewable kraft moisture-proof paper, which is coated with a mixture of acrylic emulsion and wax emulsion, is applied in a coating amount of 5 to 15 g/m2 is introduced as the top coating layer.

그러나 이러한 크라프트 방습지는 언더 코팅층을 도포한 후에 다시 탑 코팅층을 도포해야 하기 때문에 작업공정이 복잡하고, 이를 설탕지대로 사용할 경우 고온에서는 상기 탑 코팅층에 포함되어 있는 왁스 성분이 용융되면서 설탕 입자를 오염, 변색시킬 우려가 있어서 바람직하지 않다.However, this kraft moisture-proof paper is complicated because the top coating layer has to be applied again after the under coating layer is applied, and when it is used as a sugar zone, the wax component contained in the top coating layer melts at high temperatures and contaminates sugar particles. It is not preferable because there is a risk of discoloration.

또한 특허 제10-1329259호(2013.11.07.)에는, 미표백 크라프트지에다, 전분을 호화시킨 코팅조성액이나, 파라핀 왁스 에멀전을 알코올 용액에 혼합한 코팅조성액, 또는 폴리에틸렌 에멀전을 알코올 용액에 혼합한 코팅조성액 중에서 선택되는 코팅조성액을 사용하여 1차 코팅층을 형성하고, 상기 1차 코팅층 위에다 아세테이트 계열의 용제에 셀룰로오스 유도체를 혼합한 코팅조성액으로 2차 코팅층을 형성한 미표백 크라프트 포장용지가 제안되어 있다. In addition, Patent No. 10-1329259 (2013.11.07.) states that a coating composition obtained by gelling starch on unbleached kraft paper, a coating composition obtained by mixing a paraffin wax emulsion in an alcohol solution, or a polyethylene emulsion mixed with an alcohol solution. There is proposed an unbleached kraft packaging paper in which a first coating layer is formed using a coating composition selected from among coating compositions, and a second coating layer is formed on the first coating layer with a coating composition in which a cellulose derivative is mixed with an acetate-based solvent. .

그러나 상기 미표백 크라프트 포장용지 역시 1차 코팅층 위에 다시 2차 코팅층을 코팅해야 하기 때문에 전체적인 제조공정이 복잡하고, 제품 불량이 발생할 우려가 높을 뿐 아니라 제조원가가 높다는 단점이 있다.However, since the unbleached kraft packaging paper has to be coated with a second coating layer on the first coating layer again, the overall manufacturing process is complicated, there is a high risk of product defects and manufacturing costs are high.

특허 제10-168974호(1998.10.08.)Patent No. 10-168974 (1998.10.08.) 특허 제10-537733호(2005.12.13.)Patent No. 10-537733 (2005.12.13.) 특허 제10-1329259호(2013.11.07.)Patent No. 10-1329259 (2013.11.07.)

이에 본 발명의 목적은 해리성이 우수하여 재활용이 용이하고, 특히 가혹한 기후 조건에서 장시간 동안 설탕을 담아 두어도 설탕의 색상이나 입자 상태를 변화시키지 않아서 설탕을 포장 및 보관하기에 적합한 크라프트 방습지를 제공하는 것이다.Accordingly, an object of the present invention is to provide a kraft moisture-proof paper suitable for packaging and storage of sugar because it is excellent in dissociation properties and is easy to recycle, and does not change the color or particle state of sugar even if sugar is stored for a long time in severe climatic conditions. will be.

본 발명의 다른 목적은 상기 크라프트 방습지를 이용하여 간편한 제조공정과 저렴한 제조비용으로 재활용이 용이한 설탕지대를 제조하는 방법을 제공하는 것이다.Another object of the present invention is to provide a method of manufacturing a sugar bag that is easy to recycle with a simple manufacturing process and low manufacturing cost using the kraft moisture-proof paper.

본 발명에 따른 재활용이 용이한 크라프트 방습지는, 크라프트 원지의 일면 또는 양면에, 스티렌 아크릴 에멀젼 40~50중량%와; 물 35~45중량%와; 물성보완제 5~10중량%와; 습윤제 3~10중량%와; 레벨링제 1~3중량%와; 소포제 0.5~1 중량%를 포함하고, 유리전이온도(Tg)가 -40℃ ~ -30℃인 코팅제 조성물로 이루어진 방습층이 코팅되어 있는 것을 특징으로 한다.Easy to recycle kraft moisture-proof paper according to the present invention, on one or both sides of the kraft base paper, and 40 to 50% by weight of styrene acrylic emulsion; 35 to 45% by weight of water; 5 to 10% by weight of a physical property supplement; 3 to 10% by weight of a wetting agent; 1 to 3% by weight of a leveling agent; It is characterized in that a moisture-proof layer made of a coating composition containing 0.5 to 1% by weight of an antifoaming agent and having a glass transition temperature (Tg) of -40°C to -30°C is coated.

본 발명에 따른 크라프트 방습지를 이용한 설탕지대의 제조방법은, A) 평량이 50~140g/m2 인 크라프트 원지를 준비하는 단계와; B) 스티렌 아크릴 에멀젼 40~50중량%와, 물 35~45중량%와, 물성보완제 5~10중량%와, 습윤제 3~10중량%와, 레벨링제 1~3중량%와, 소포제 0.5~1 중량%로 이루어지고, 유리전이온도(Tg)가 -40℃ ~ -30℃인 코팅제 조성물을 준비하는 단계와; C) 상기 크라프트 원지의 일면에 상기 코팅제 조성물을 5~20g/m2의 도포량으로 코팅하고, 이를 건조시켜서 크라프트 방습지를 제조하는 단계와; D) 상기 크라프트 방습지를 미리 설정된 규격에 따라 제단하고, 필요한 부분을 접합하여 설당지대를 제조하는 단계; 를 포함하는 것을 특징으로 한다. The manufacturing method of the sugar band using the kraft moisture-proof paper according to the present invention comprises the steps of: A) preparing a kraft base paper having a basis weight of 50 to 140 g/m 2 ; B) 40 to 50% by weight of styrene acrylic emulsion, 35 to 45% by weight of water, 5 to 10% by weight of a physical property supplement, 3 to 10% by weight of a wetting agent, 1 to 3% by weight of a leveling agent, and 0.5 to a defoaming agent Preparing a coating composition consisting of 1% by weight, a glass transition temperature (Tg) of -40 ℃ ~ -30 ℃; C) coating the coating composition on one side of the kraft paper at an application amount of 5 to 20 g/m 2 , and drying it to prepare a kraft moisture-proof paper; D) cutting the kraft moisture-proof paper according to a preset standard and joining the necessary parts to produce a seoldang zone; It characterized in that it comprises a.

본 발명에 따른 크라프트 방습지 및 이를 이용하여 제조되는 설탕지대는, 가혹한 기후 조건에서 장시간 동안 설탕을 담아 두어도 설탕의 색상이나 입자 상태를 변화시키지 않는 효과가 있고, 나아가 물에 의한 해리성이 우수하여 재활용이 용이한 효과가 있다. The kraft moisture-proof paper according to the present invention and the sugar band manufactured using the same have the effect of not changing the color or particle state of sugar even if the sugar is stored for a long time under severe climatic conditions, and furthermore, it is excellent in dissociation by water and is recycled. This has an easy effect.

이하, 본 발명의 바람직한 실시예를 이용하여 본 발명의 기술 구성을 상세하게 설명한다. 다만, 본 발명을 실시하는데 꼭 필요한 구성이라 하더라도 종래기술에 소개되어 있거나, 통상의 기술자가 공지기술로부터 용이하게 실시할 수 있는 사항에 대해서는 구체적인 설명을 생략한다.Hereinafter, the technical configuration of the present invention will be described in detail using a preferred embodiment of the present invention. However, even if the configuration is essential for carrying out the present invention, detailed descriptions of matters that are introduced in the prior art or that can be easily implemented by a person of ordinary skill in the art will be omitted.

본 발명에 따른 재활용이 용이한 크라프트 방습지는 베이스 시트(base sheet)가 되는 크라프트 원지의 일면 또는 양면에 본 발명에 따른 코팅제 조성물로 이루어진 방습층이 코팅되어 있는 구조로 이루어진다.The easy-to-recyclable kraft moisture-proof paper according to the present invention has a structure in which a moisture-proof layer made of the coating composition according to the present invention is coated on one or both sides of the kraft base paper that becomes a base sheet.

상기 방습층을 구성하는 코팅제 조성물은, 스티렌 아크릴 에멀젼 40~50중량%와, 물 35~45중량%와, 물성보완제 5~10중량%, 알코올 3~10중량%와, 레벨링제 1~3중량%와, 소포제 0.5~1 중량%를 포함하여 구성된다. The coating composition constituting the moisture-proof layer includes 40 to 50% by weight of styrene acrylic emulsion, 35 to 45% by weight of water, 5 to 10% by weight of a physical property supplement, 3 to 10% by weight of alcohol, and 1 to 3% by weight of a leveling agent. % And 0.5 to 1% by weight of an antifoaming agent.

상기 스티렌 아크릴 에멀젼은 상기 방습층을 구성하는 기초수지로서, 유리전이온도(Tg)가 100℃인 스티렌 수지 10~20중량%, 바람직하기로는 15중량%와, 유리전이온도(Tg)가 -50℃인 2-에틸헥실 아크릴레이트 80~90중량%, 바람직하기로는 85중량%로 이루어진다. The styrene acrylic emulsion is a base resin constituting the moisture-proof layer, and a glass transition temperature (Tg) of 10 to 20% by weight of a styrene resin having a 100°C, preferably 15% by weight, and a glass transition temperature (Tg) of -50°C Phosphorus 2-ethylhexyl acrylate 80 to 90% by weight, preferably 85% by weight.

여기서 상기 스티렌 수지의 함량이 20중량%를 초과하거나 상기 2-에틸헥실 아크릴레이트의 함량이 80중량% 미만일 경우, 상기 코팅제 조성물의 유리전이온도(Tg)가 상승하면서 방습층의 물성은 경화되고, 방습기능이 저하되는 문제가 있다. 반대로 상기 스티렌 수지의 함량이 10중량% 미만이거나 상기 2-에틸헥실 아크릴레이트의 함량이 90중량% 초과할 경우, 방습층의 방습기능은 증가하지만 코팅과정에서 동일한 구성성분들끼리 뭉쳐버리는 소위 블로킹(blocking) 현상이 발생하기 때문에 균일한 방습층을 형성하기 어려운 문제가 있다.Here, when the content of the styrene resin exceeds 20% by weight or the content of 2-ethylhexyl acrylate is less than 80% by weight, the glass transition temperature (Tg) of the coating composition is increased, and the properties of the moisture-proof layer are cured and moisture-proof. There is a problem that the function is deteriorated. Conversely, when the content of the styrene resin is less than 10% by weight or the content of 2-ethylhexyl acrylate exceeds 90% by weight, the moisture-proof function of the moisture-proof layer increases, but the so-called blocking that the same components are aggregated during the coating process. ) As the phenomenon occurs, it is difficult to form a uniform moisture-proof layer.

다음으로 물은 상기 스티렌 아크릴 에멀젼에 대한 용제로서, 유동성과 분산성을 향상시켜 주는 기능을 한다. 상기 물의 함량이 그 함량이 35중량% 미만이면 상기 코팅제 조성물의 점도가 너무 높아져서 균일한 코팅이 곤란한 문제가 있고, 반대로 45중량%를 초과하면 도포된 방습층을 건조가 늦어지는 문제가 있다.Next, water, as a solvent for the styrene acrylic emulsion, functions to improve fluidity and dispersibility. If the content of the water is less than 35% by weight, the viscosity of the coating composition is too high, so that uniform coating is difficult, and if it exceeds 45% by weight, there is a problem that drying of the applied moisture-proof layer is delayed.

상기 물성보완제는 방습층의 내수성을 증진시키는 기능을 하는 것으로, 실리콘을 사용하는 것이 바람직하다. 상기 물성보완제의 함량이 5중량% 미만이면 방습층의 내수성이 미흡해 지는 문제가 있고, 반대로 10중량%를 초과하면 방습층의 슬립(Slip)성이 지나치게 향상되어 설탕지대를 제조하는 공정에서 제품 불량이 발생할 가능성이 높아지는 문제가 있다.The physical property supplement has a function of improving the water resistance of the moisture-proof layer, and it is preferable to use silicone. If the content of the physical property supplement is less than 5% by weight, there is a problem that the water resistance of the moisture-proof layer is insufficient. On the contrary, if it exceeds 10% by weight, the slip property of the moisture-proof layer is excessively improved, resulting in product defects in the process of manufacturing a sugar band. There is a problem that the likelihood of this occurrence increases.

상기 습윤제는 상기 코팅제 조성물의 표면장력을 감소시켜서 상기 크라프트 원지 속으로 용이하게 침투시키는 기능하는 것으로, 에탄올을 사용하는 것이 바람직하다. 상기 습윤제의 함량이 3중량% 미만이면 상기 코팅제 조성물이 상기 크라프트 원지 속으로 용이하게 침투하지 못하는 문제가 있고, 반대로 10중량%를 초과하면 상기 코팅제 조성물이 너무 빨리 건조되므로 코팅 작업 시에 아닐록스 롤러(anilox roller)에서 소위 판메임 현상이 발생할 우려가 있다.The wetting agent has a function of easily penetrating into the kraft base paper by reducing the surface tension of the coating composition, and it is preferable to use ethanol. If the content of the wetting agent is less than 3% by weight, there is a problem that the coating composition does not easily penetrate into the kraft paper, and if it exceeds 10% by weight, the coating composition is dried too quickly, so an anilox roller during coating operation There is a concern that a so-called panmeim phenomenon may occur in the (anilox roller).

상기 레벨링제는 상기 코팅제 조성물을 코팅할 때 크라프트 원지에 대한 전이성 및 방습층의 표면 상태를 양호하게 유지해 주는 기능을 하는 것으로, 폴리에테르 실록산 공중합체인 것이 바람직하다. 상기 레벨링제의 함량이 1중량% 미만이면 상기 코팅제 조성물의 전이성이 불량하게 되는 문제가 있고, 반대로 3중량%를 초과하면 방습층을 도포할 때 기포발생이 많이 발생하여 방습층의 표면 상태에 불량하게 되는 문제가 있다.The leveling agent has a function of maintaining good transferability to the kraft base paper and the surface state of the moisture-proof layer when coating the coating composition, and is preferably a polyether siloxane copolymer. If the content of the leveling agent is less than 1% by weight, there is a problem that the transferability of the coating composition is poor, and if it exceeds 3% by weight, bubbles are generated a lot when applying the moisture-proof layer, resulting in poor surface condition of the moisture-proof layer. there is a problem.

마지막으로 상기 소포제는 상기 크라프트 원지에 본 발명의 코팅제 조성물을 코팅할 때 발생하는 기포를 제거하는 기능을 하는 것으로, 폴리에테르 실록산 공중합체와 소수성 실리카인 것이 바람직하다. 상기 소포제의 함량이 0.5중량% 미만이면 상기 방습층을 도포할 때 기포가 발생하여 방습층의 표면 상태가 불량하게 되는 문제가 있고, 반대로 1중량%를 초과하면 상기 방습층에 분화구와 같은 기공이 발생하여 방습효과가 떨어지는 문제가 있다.Finally, the antifoaming agent functions to remove air bubbles generated when the coating composition of the present invention is coated on the kraft base paper, and is preferably a polyether siloxane copolymer and a hydrophobic silica. If the content of the antifoaming agent is less than 0.5% by weight, bubbles are generated when the moisture-proof layer is applied and the surface condition of the moisture-proof layer is poor. On the contrary, if it exceeds 1% by weight, pores such as craters are generated in the moisture-proof layer, thereby preventing moisture. There is a problem that is not effective.

한편, 상기 코팅제 조성물은 유리전이온도(Tg)가 -40℃ ~ -30℃인 것이 바람직하다. 상기 코팅제 조성물의 유리전이온도(Tg)가 -40℃ 미만이면 코팅제 조성물을 도포할 때 도막의 형성이 미흡하여 결과적으로 방습층의 내수성이 약해지는 문제가 있고, 반대로 -30℃를 초과하면 코팅제 조성물의 물성이 소프트(Soft)해 져서 블로킹 형상이 발생하는 문제가 있다.Meanwhile, the coating composition preferably has a glass transition temperature (Tg) of -40°C to -30°C. If the glass transition temperature (Tg) of the coating composition is less than -40°C, the formation of a coating film is insufficient when applying the coating composition, and as a result, the water resistance of the moisture-proof layer is weakened. There is a problem that a blocking shape occurs because the physical properties become soft.

또한 상기 코팅제 조성물의 도포량은 5~20g/m2인 것이 바람직하다. 만일 상기 도포량이 5g/m2 미만이면 원하는 방습효과를 얻을 수 없고, 반대로 20g/m2을 초과하면 제조원가의 증가에 비해 수반되는 효과의 상승이 미미하여 결과적으로 가성비가 불량하게 되는 단점이 있다. In addition, the coating amount of the coating composition is preferably 5 ~ 20g / m 2 . If the coating amount is less than 5g/m 2, the desired moisture-proof effect cannot be obtained, and if it exceeds 20 g/m 2 , the increase in the accompanying effect is insignificant compared to the increase in manufacturing cost, resulting in poor cost performance.

이하, 본 발명에 따른 설탕지대의 제조방법을 A) 단계 내지 D) 단계로 나누어 설명한다.Hereinafter, a method of manufacturing a sugar band according to the present invention will be described by dividing it into steps A) to D).

먼저 A) 단계에서는 크라프트 원지를 준비한다. 상기 크라프트 원지는 평량이 50~140g/m2 인 것을 사용하는 것이 바람직하다. 여기서 평량(坪量)이라 함은 일정 면적에 해당하는 종이의 중량을 의미하는 것으로, 예컨대 1m2 면적에 해당하는 종이의 중량을 의미한다. First, in step A), kraft paper is prepared. It is preferable to use the kraft base paper having a basis weight of 50 to 140 g/m 2 . Here, the basis weight means the weight of paper corresponding to a certain area, for example, means the weight of paper corresponding to an area of 1 m 2 .

상기 크라프트 원지의 평량이 50g/m2 미만이면, 인열강도(mN) 및 인장강도(N/15mm)가 너무 취약해서 설탕지대로 사용할 경우 운송 또는 취급과정에서 포대가 파손될 우려가 있고, 반대로 140 g/m2을 초과하면 두께가 너무 두꺼워져서 제조과정에서 취급이 불편할 뿐 아니라 제조원가가 상승하기 때문에 바람직하지 않다.If the basis weight of the kraft paper is less than 50g/m 2 , the tear strength (mN) and tensile strength (N/15mm) are too weak, so if used as a sugar bag, the bag may be damaged during transportation or handling, and vice versa. If it exceeds g/m 2 , the thickness becomes too thick, making handling inconvenient during the manufacturing process as well as increasing manufacturing cost, which is not preferable.

다음 B) 단계에서는 스티렌 아크릴 에멀젼 40~50중량%와, 물 35~45중량%와, 물성보완제 5~10중량%와, 습윤제 3~10중량%와, 레벨링제 1~3중량%와, 소포제 0.5~1 중량%로 이루어지고, 유리전이온도(Tg)가 -40℃ ~ -30℃인 코팅제 조성물을 준비한다. 상기 코팅제 조성물의 구성성분 및 함량에 대한 구체적인 설명은 앞서 설명한 바와 같다.In the next step B), 40 to 50% by weight of a styrene acrylic emulsion, 35 to 45% by weight of water, 5 to 10% by weight of a property supplement, 3 to 10% by weight of a wetting agent, 1 to 3% by weight of a leveling agent, and To prepare a coating composition consisting of 0.5 to 1% by weight of the antifoaming agent and having a glass transition temperature (Tg) of -40°C to -30°C. A detailed description of the components and contents of the coating composition is as described above.

다음 C) 단계에서는 상기 크라프트 원지의 일면에 상기 코팅제 조성물을 5~20g/m2의 도포량으로 코팅하고, 이를 건조시켜서 일면에 방습층이 도포된 크라프트 방습지를 제조한다. 상기 C) 단계에서 크라프트 원지의 양면에 방습층을 코팅 할 경우 방습 효과는 당연히 상승하겠지만, 일면에만 방습층을 코팅하더라도 설탕지대에 필요한 방습 효능은 충분히 확보할 수 있다.In the next step C), the coating composition is coated on one side of the kraft paper at an application amount of 5 to 20 g/m 2 and dried to prepare a kraft moisture-proof paper with a moisture-proof layer on one side. If the moisture-proof layer is coated on both sides of the kraft paper in step C), the moisture-proof effect will naturally increase, but even if the moisture-proof layer is coated on only one side, the moisture-proof effect required for the sugar band can be sufficiently secured.

따라서 크라프트 원지의 양면에 방습층을 코팅하면, 소위 제조원가의 상승으로 인해 소위 가성비가 악화되고, 폐지를 해리하는데 더 많은 비용과 더 많은 시간이 소요되며, 나아가 설탕지대의 양면이 모두 미끄러워져서 설탕포대의 제조 및 운반 작업이 불편하게 되는 단점이 있다. Therefore, if the moisture-proof layer is coated on both sides of the kraft paper, the so-called cost-effectiveness is deteriorated due to the so-called increase in manufacturing cost, and it takes more cost and more time to dissociate the waste paper. There is a disadvantage that the manufacturing and transporting operation becomes inconvenient.

그래서 본 발명에서는 상기 방습층이 코팅된 면을 설탕지대의 내면으로 하고, 방습층이 코팅되지 않은 면을 설탕지대의 외면으로 포대를 제작함으로써, 충분한 내습성과 우수한 해리성 및 용이한 작업성을 모두 확보할 수 있다. So, in the present invention, by making the surface coated with the moisture-proof layer as the inner surface of the sugar bag and the surface not coated with the moisture-proof layer as the outer surface of the sugar bag, sufficient moisture resistance, excellent dissociation property, and easy workability can be secured. I can.

한편, 상기 C) 단계의 코팅작업은 FLEXO 인쇄기를 이용하여 실시할 수 있다. 그 중에서도 CI FLEXO 인쇄기의 고무롤러를 이용한 롤러코팅 방식으로 실시하는 것이 바람직하다. 상기 CI(Central Impression) 인쇄기는 중앙 압통방식의 윤전 인쇄기로서 보통 정밀도가 높은 인쇄 작업 시에 사용된다. 상기 CI 인쇄기의 작동조건은 운전속도 33~100m/min, 코팅온도 19~110℃으로 하고, 작업텐션은 언와인드 35kg, 아웃피드 45kg, 리와인드 35kg으로 운전하는 것이 바람직하다.Meanwhile, the coating operation of step C) may be performed using a FLEXO printing machine. Among them, it is preferable to carry out a roller coating method using a rubber roller of a CI FLEXO printing machine. The CI (Central Impression) printing machine is a rotary press of a central pressure type, and is usually used for high-precision printing. It is preferable to operate the CI printer at an operating speed of 33 to 100 m/min, a coating temperature of 19 to 110° C., and a working tension of 35 kg of unwind, 45 kg of outfeed, and 35 kg of rewind.

상기 C) 단계에서 상기 크라프트 원지에 도포된 코팅제 조성물을 건조시키는 작업은 상기 코팅제 조성물이 도포된 크라프트 원지가 상기 CI 인쇄기의 데크와 터널을 통과하면서 진행된다. 이때, 상기 데크와 터널의 온도는 100℃, 상기 데크와 터널 간의 거리는 약 15~20m정도이며, 상기 크라프트 원지가 상기 데크와 터널을 통과하는 시간은 약 10~15초 인 것이 바람직하다.In step C), the drying of the coating composition applied to the kraft base paper is performed while the kraft base paper coated with the coating composition passes through the deck and tunnel of the CI printing machine. At this time, the temperature of the deck and the tunnel is 100 ℃, the distance between the deck and the tunnel is about 15 ~ 20m, it is preferable that the time for the kraft paper to pass through the deck and the tunnel is about 10 ~ 15 seconds.

마지막으로 D) 단계에서는 상기 C) 단계에서 제조된 크라프트 방습지를 통상적인 지대(紙袋) 제조용 제대기(製袋機)에 투입하여 미리 설정된 규격에 따라 제단한 다음, 필요한 부분을 인쇄 및 봉합하여 본 발명에 따른 설탕지대를 제조한다.Finally, in step D), the kraft moisture-proof paper produced in step C) is inserted into a conventional umbilical machine for manufacturing a belt, cut according to a preset standard, and then printed and sealed to the required part. To prepare a sugar belt according to the invention.

[실시예][Example]

스티렌 아크릴 에멀젼 46중량%와, 물 37중량%, 실리콘 7.7중량%, 메탄올 7중량%와, 폴리에테르 실록산 공중합체 1.6중량%와, 폴리에테르 실록산 공중합체와 소수성 실리카 0.7중량%로 이루어진 코팅제 조성물을 제조하였다.A coating composition consisting of 46% by weight of styrene acrylic emulsion, 37% by weight of water, 7.7% by weight of silicone, 7% by weight of methanol, 1.6% by weight of polyether siloxane copolymer, and 0.7% by weight of polyether siloxane copolymer and hydrophobic silica Was prepared.

이때, 상기 스티렌 아크릴 에멀젼은 유리전이온도(Tg)가 100℃인 스티렌 수지 15중량%와 유리전이온도(Tg)가 -50℃인 2-에틸헥실 아크릴레이트 85중량%로 이루어진 것을 사용하였다. 상기 코팅제 조성물의 유리전이온도는 -34℃인 것으로 확인되었다.At this time, the styrene acrylic emulsion was used as consisting of 15% by weight of a styrene resin having a glass transition temperature (Tg) of 100 ℃ and 85% by weight of 2-ethylhexyl acrylate having a glass transition temperature (Tg) of -50 ℃. It was confirmed that the glass transition temperature of the coating composition was -34°C.

평량이 80g/m2 인 크라프트 원지를 준비하고, CI 인쇄기의 고무롤러를 이용하여 상기 크라프트 원지의 일면에다 상기 코팅제 조성물을 10~12 g/m2의 도포량으로 도포한 후 건조하여 크라프트 방습지를 제조하였다. 이때, 상기 CI 인쇄기의 작동조건은 최대 운전속도 100m/min, 코팅온도 100℃으로 하고, 작업텐션은 언와인드 35kg, 아웃피드 45kg, 리와인드 35kg으로 운전하였다.Prepare a kraft paper with a basis weight of 80 g/m 2 , apply the coating composition to one side of the kraft paper with a coating amount of 10 to 12 g/m 2 using a rubber roller of a CI printing machine, and then dry it to prepare a kraft moisture-proof paper. I did. At this time, the operating conditions of the CI printer were set to a maximum operating speed of 100 m/min and a coating temperature of 100° C., and the work tension was operated at 35 kg of unwind, 45 kg of outfeed, and 35 kg of rewind.

상기 크라프트 방습지를 미리 설정된 규격에 따라 접고 풀칠하여 가로 35.5 Cm, 세로 61 Cm, 측면 넓이 각각 7.5 Cm로 절단하여 설당지대를 제조하였다. The kraft moisture-proof paper was folded and pasted according to a preset standard, and cut into 35.5 cm in width, 61 cm in length, and 7.5 cm in side width, respectively, to prepare a seoldang zone.

[성능시험][Performance test]

상기 설탕지대에다 각각 백설탕을 15 Kg씩 담아서 입구를 밀봉한 시료 10개를 제조하고, 상기 시료들을 습도 60%, 온도 40℃의 가혹조건 하에서 각각 15일간 저장한 다음, 내부 상태를 확인하였다. 그 결과 모든 시료에서는 설탕이 뭉치거나 변색되는 변화가 전혀 관찰되지 않았다.Each of the sugar strips was filled with 15 Kg of white sugar to prepare 10 samples whose inlet was sealed, and the samples were stored for 15 days under severe conditions of 60% humidity and 40°C, and then the internal condition was checked. As a result, in all samples, no change in sugar formation or discoloration was observed.

또한 상기 시료들 중 3개를 임의 선택하여 설탕을 모두 배출하고, 빈 설탕대지를 물에 하루 동안 침지하여 해리시험을 실시한 결과, 크라프트 원지의 재료인 펄프를 90% 이상 재생할 수 있는 것을 확인되었다. In addition, as a result of performing a dissociation test by randomly selecting three of the above samples to discharge all the sugar, and immersing the empty sugar ground in water for a day, it was confirmed that the pulp, which is the material of the kraft paper, can be reproduced by more than 90%.

마지막으로 상기 시료들에 대한 방습효과를 확인하기 위하여 투습도 실험(Cobb Size도)을 실시하였다. 본 발명의 실시예에 따라 제조된 시료들 중 3개를 임의 선택하고, 각 시료를 13cm×13cm의 크기로 잘라서 시료로 사용하였다. 그리고 비교예로는 방습제 조성물이 코팅되지 않은 크라프트 원지 3개를 동일한 크기로 잘라서 시료로 하였다.Finally, a moisture permeability experiment (Cobb Size) was conducted to confirm the moisture-proof effect on the samples. Three of the samples prepared according to the embodiment of the present invention were randomly selected, and each sample was cut into a size of 13 cm×13 cm and used as samples. In addition, as a comparative example, three kraft papers not coated with the desiccant composition were cut into the same size to prepare a sample.

투습도 시험방법은 상기 실시예 및 비교예의 시료를 각각 투습도 시험기구에 투입한 다음, 이 시험기구 내에 물 100ml를 투입하고, 약 2분 동안 침지하였다. 상기 시험기구에서 시료를 꺼낸 다음, 각각 무게를 측정하고 투습도(g/m2)를 산출하였다.In the moisture permeability test method, the samples of the above examples and comparative examples were respectively added to the moisture permeability test apparatus, and then 100 ml of water was added to the test apparatus, and immersed for about 2 minutes. After taking the sample out of the test apparatus, each weight was measured and the moisture permeability (g/m 2 ) was calculated.

그 결과, 본 발명에 따라 제조된 실시예의 시료는 투습도가 평균 27.9 g/m2이고, 상기 비교예의 시료는 투습도가 평균 32.7 g/m2인 것으로 나타났다. 따라서 본 발명에 따라 제조되는 설탕지대는 우수한 방습효과를 갖는 것으로 확인되었다.As a result, it was found that the sample of Example prepared according to the present invention had an average moisture permeability of 27.9 g/m 2 , and that of the comparative example had an average of 32.7 g/m 2 . Therefore, it was confirmed that the sugar band prepared according to the present invention has an excellent moisture-proof effect.

Claims (7)

크라프트 원지의 일면 또는 양면에, 스티렌 아크릴 에멀젼 40~50중량%와; 물 35~45중량%와; 물성보완제 5~10중량%와; 습윤제 3~10중량%와; 레벨링제 1~3중량%와; 소포제 0.5~1 중량%를 포함하고, 유리전이온도(Tg)가 -40℃ ~ -30℃인 코팅제 조성물로 이루어진 방습층이 코팅되어 있는 것을 특징으로 하는 재활용이 용이한 크라프트 방습지.
On one or both sides of the kraft paper, 40 to 50% by weight of styrene acrylic emulsion; 35 to 45% by weight of water; 5 to 10% by weight of a physical property supplement; 3 to 10% by weight of a wetting agent; 1 to 3% by weight of a leveling agent; Easy-to-recyclable kraft moisture-proof paper, characterized in that it contains 0.5 to 1% by weight of a defoaming agent and is coated with a moisture-proof layer made of a coating composition having a glass transition temperature (Tg) of -40°C to -30°C.
제1항에 있어서, 상기 스티렌 아크릴 에멀젼은 유리전이온도(Tg)가 100℃인 스티렌 수지 10~20중량%와, 유리전이온도(Tg)가 -50℃인 2-에틸헥실 아크릴레이트 80~90중량%로 구성된 것임을 특징으로 하는 재활용이 용이한 크라프트 방습지.
The method of claim 1, wherein the styrene acrylic emulsion comprises 10 to 20% by weight of a styrene resin having a glass transition temperature (Tg) of 100°C, and 2-ethylhexyl acrylate 80 to 90 having a glass transition temperature (Tg) of -50°C. Kraft moisture proof paper that is easy to recycle, characterized in that it consists of weight percent.
제1항 또는 제2항에 있어서, 상기 물성보완제는 실리콘이고, 상기 습윤제는 에탄올이며, 상기 레벨링제는 폴리에테르 실록산 공중합체이고, 상기 소포제는 폴리에테르 실록산 공중합체와 소수성 실리카인 것을 특징으로 하는 재활용이 용이한 크라프트 방습지.
The method according to claim 1 or 2, wherein the physical property supplement is silicone, the wetting agent is ethanol, the leveling agent is a polyether siloxane copolymer, and the antifoaming agent is a polyether siloxane copolymer and hydrophobic silica. Kraft moisture-proof paper that is easy to recycle.
제1항 또는 제2항에 있어서, 상기 코팅제 조성물의 도포량은 5~20g/m2인 것을 특징으로 하는 재활용이 용이한 크라프트 방습지.
The kraft moisture-proof paper according to claim 1 or 2, wherein the coating composition is applied in an amount of 5 to 20 g/m 2 .
평량이 50~140g/m2 인 크라프트 원지의 일면에, 유리전이온도(Tg)가 100℃인 스티렌 수지 15중량%와 유리전이온도(Tg)가 -50℃인 2-에틸헥실 아크릴레이트 85중량%로 이루어진 스티렌 아크릴 에멀젼 46중량%와; 물 37중량%와; 실리콘 7.7중량%와; 메탄올 7중량%와; 폴리에테르 실록산 공중합체 1.6중량%와; 폴리에테르 실록산 공중합체와 소수성 실리카 0.7중량%를 포함하는 코팅제 조성물로 이루어진 방습층이 5~20g/m2의 코팅량으로 코팅되어 있는 것을 특징으로 하는 재활용이 용이한 크라프트 방습지.
On one side of kraft paper having a basis weight of 50 to 140 g/m 2 , 15 wt% of styrene resin having a glass transition temperature (Tg) of 100°C and 85 wt% of 2-ethylhexyl acrylate having a glass transition temperature (Tg) of -50°C 46% by weight of a styrene acrylic emulsion consisting of; 37% by weight of water; 7.7% by weight of silicone; 7% by weight of methanol; 1.6% by weight of polyether siloxane copolymer; Easy to recycle kraft moisture-proof paper, characterized in that a moisture-proof layer made of a coating composition comprising a polyether siloxane copolymer and 0.7% by weight of hydrophobic silica is coated with a coating amount of 5 to 20 g/m 2 .
A) 평량이 50~140g/m2 인 크라프트 원지를 준비하는 단계와;
B) 스티렌 아크릴 에멀젼 40~50중량%와, 물 35~45중량%와, 물성보완제 5~10중량%와, 습윤제 3~10중량%와, 레벨링제 1~3중량%와, 소포제 0.5~1 중량%로 이루어지고, 유리전이온도(Tg)가 -40℃ ~ -30℃인 코팅제 조성물을 준비하는 단계와;
C) 상기 크라프트 원지의 일면에 상기 코팅제 조성물을 5~20g/m2의 도포량으로 코팅하고, 이를 건조시켜서 크라프트 방습지를 제조하는 단계와;
D) 상기 크라프트 방습지를 미리 설정된 규격에 따라 제단하고, 필요한 부분을 접합하여 설당지대를 제조하는 단계;
를 포함하는 것을 특징으로 하는 크라프트 방습지를 이용한 설탕지대의 제조방법.
A) preparing a kraft base paper having a basis weight of 50 to 140 g/m 2 ;
B) 40 to 50% by weight of styrene acrylic emulsion, 35 to 45% by weight of water, 5 to 10% by weight of a physical property supplement, 3 to 10% by weight of a wetting agent, 1 to 3% by weight of a leveling agent, and 0.5 to a defoaming agent Preparing a coating composition consisting of 1% by weight, a glass transition temperature (Tg) of -40 ℃ ~ -30 ℃;
C) coating the coating composition on one side of the kraft paper at an application amount of 5 to 20 g/m 2 , and drying it to prepare a kraft moisture-proof paper;
D) cutting the kraft moisture-proof paper according to a preset standard and joining the necessary parts to produce a seoldang zone;
Manufacturing method of a sugar band using a kraft moisture-proof paper, characterized in that it comprises a.
제6항에 있어서, 상기 C) 단계에서 상기 코팅제 조성물을 코팅하는 작업은 CI(Central Impression) 인쇄기의 고무롤러를 이용하여 90~110℃의 코팅온도에서 33~100m/min의 속도로 코팅하는 것을 특징으로 하는 크라프트 방습지를 이용한 설탕지대의 제조방법.The method of claim 6, wherein the coating of the coating composition in step C) comprises coating at a coating temperature of 90 to 110°C at a rate of 33 to 100 m/min using a rubber roller of a CI (Central Impression) printing machine. A method of manufacturing a sugar band using kraft moisture-proof paper, characterized in that.
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JPH07189181A (en) * 1993-12-24 1995-07-25 New Oji Paper Co Ltd Readily disintegrable moistureproof paper
KR960015819B1 (en) * 1993-08-28 1996-11-21 이걸구 A method of waterproofing and dampproofing
KR0168974B1 (en) 1995-12-18 1999-03-20 구형우 Coating composition for moisture-proof and moisture-proof paper
JP2003054571A (en) * 2001-08-13 2003-02-26 Nippon Seitai Kk Moisture-proof craft paper bag
JP2004003118A (en) * 2003-09-01 2004-01-08 Oji Paper Co Ltd Dampproof paper
KR100500600B1 (en) * 2002-03-15 2005-07-11 명성산업 주식회사 Reproducible moisture-proofing paper and method for producing the same
KR100537733B1 (en) 2003-10-21 2005-12-23 (주)카이시스 Kraft moisture-proof paper
KR101329259B1 (en) 2011-11-25 2013-11-14 이풍우 Packing paper having waterproofing and its manufacturing method
KR20180005216A (en) * 2015-05-12 2018-01-15 바스프 에스이 Coated substrates comprising surface-treated, aqueous polymer coatings and methods of making and using them

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR960015819B1 (en) * 1993-08-28 1996-11-21 이걸구 A method of waterproofing and dampproofing
JPH07189181A (en) * 1993-12-24 1995-07-25 New Oji Paper Co Ltd Readily disintegrable moistureproof paper
KR0168974B1 (en) 1995-12-18 1999-03-20 구형우 Coating composition for moisture-proof and moisture-proof paper
JP2003054571A (en) * 2001-08-13 2003-02-26 Nippon Seitai Kk Moisture-proof craft paper bag
KR100500600B1 (en) * 2002-03-15 2005-07-11 명성산업 주식회사 Reproducible moisture-proofing paper and method for producing the same
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