KR100407252B1 - A method for preparing paper improving dimensional stability - Google Patents
A method for preparing paper improving dimensional stability Download PDFInfo
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- KR100407252B1 KR100407252B1 KR10-2000-0084959A KR20000084959A KR100407252B1 KR 100407252 B1 KR100407252 B1 KR 100407252B1 KR 20000084959 A KR20000084959 A KR 20000084959A KR 100407252 B1 KR100407252 B1 KR 100407252B1
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
- D21F11/06—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the cylinder type
- D21F11/08—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the cylinder type paper or board consisting of two or more layers
Abstract
본 발명은 치수안정성이 향상된 종이의 제조방법에 관한 것으로, 좀 더 상세하게는 면섬유를 고해 및 리파이닝하여 펄프를 제조하고, 펄프에 유/무기 충전제 및 습윤지력증강제를 첨가하여 지료를 조성한 후 습지를 제조하여 압착 및 건조시켜 원지를 제조하는 단계; 제1표면처리제 수용액으로 상기 원지를 제1표면처리시키는 단계; 제2표면처리제 수용액으로 상기 제1표면처리된 원지를 제2표면처리시키는 단계; 및 제2표면처리된 원지를 건조 및 조습시키는 단계를 포함하는 치수안정성이 향상된 종이의 제조방법에 관한 것이다. 본 발명에 따라 제조된 종이는 내절도가 매우 높게 상승될 뿐만 아니라, 기계방향 내절도에 비하여 상대적으로 낮은 폭방향 내절도가 크게 상승된다. 또한 본 발명에 의하여 제조된 종이는 고압의 요판인쇄에 의한 치수안정성이 향상되어 종이의 불균일한 신장이나 두께가 감소하는 것을 최소로 줄일 수 있다.The present invention relates to a method for manufacturing paper with improved dimensional stability, and more particularly, to prepare pulp by beating and refining cotton fibers, and adding a wet / oil filler and an inorganic filler to the pulp to form wetlands. Preparing, compressing, and drying to prepare raw paper; First surface treating the base paper with an aqueous first surface treating agent; Performing a second surface treatment of the first surface-treated paper with a second surface treatment solution in water; And it relates to a method of producing a paper with improved dimensional stability comprising the step of drying and humidifying the second surface-treated paper. The paper produced according to the present invention not only has a very high degree of abrasion resistance, but also has a relatively low width in terms of abrasion resistance as compared with the mechanical direction. In addition, the paper produced according to the present invention is improved in the dimensional stability by high-pressure intaglio printing can be reduced to reduce the non-uniform elongation or thickness of the paper to a minimum.
Description
발명은 치수안정성이 향상된 종이의 제조방법에 관한 것으로, 초지시에 면섬유의 손상을 적게 하고 표면처리에 의해 폭방향 내절도가 향상되며 고압인쇄에 대해 우수한 치수안정성을 갖고, 인쇄적성이 향상되어 고정밀 인쇄가 요구되는 종이의 제조방법에 관한 것이다.The present invention relates to a method for manufacturing paper with improved dimensional stability, which reduces cotton fiber damage during papermaking, improves width resistance in the width direction by surface treatment, has excellent dimensional stability for high pressure printing, and improves printability and high precision. The present invention relates to a method for producing paper in which printing is required.
종래부터 고급류의 종이를 제조할 때 유통 내구성 및 제반 물성을 향상시키기 위하여 면섬유를 사용하고, 제조된 원지의 표면처리제로 전분, 젤라틴 또는 폴리비닐알콜 등을 사용하였다.Conventionally, when manufacturing high-quality paper, cotton fiber is used to improve distribution durability and physical properties, and starch, gelatin, or polyvinyl alcohol is used as a surface treatment agent of the prepared paper.
통상적으로 종이를 제조하기 위한 원지는 목재펄프 및 비목재펄프(면섬유, 아마섬유, 볏짚 펄프, 아바카 등)가 주체로 되어 있는 상태에서 사이즈제(종이가 물에 쉽게 적셔지지 않게 하는 약품), 건조지력증강제(종이가 건조되어 있을 때 강도를 유지시키는 약품), 습윤지력증강제(종이가 젖어 있을 때 강도를 일정하게 유지시키는 약품), 기타 특수한 목적으로 사용되는 약품 등이 첨가된다. 이러한 목적으로 첨가되는 약품은 0.1∼1%로 물로 희석된 상태에서 탈수되고 압착 및 건조되어종이가 제조되기 때문에 상당히 많은 약품이 탈수과정에서 손실되는 결과를 초래한다. 따라서 종이의 강도 및 특수한 약품의 성능을 최상으로 유지하기 위해서 제조된 원지에 약품을 직접 처리하는 방법이 매우 적절하여 대부분의 제지공장에서 표면처리(또는 표면사이징)를 실시한다.Typically, the base for making paper is a sizing agent (a drug that does not easily wet paper) with wood pulp and non-wood pulp (cotton fiber, flax fiber, rice straw pulp, abaca, etc.) as the main body, Dry strength enhancers (drugs that maintain strength when paper is dry), wet strength enhancers (drugs that maintain constant strength when paper is wet), and other special-purpose drugs. Drugs added for this purpose are dehydrated in water diluted to 0.1 to 1%, compressed and dried, resulting in the production of paper, resulting in the loss of a significant amount of drugs in the dehydration process. Therefore, in order to maintain the strength of paper and the performance of special chemicals in the best way, direct processing of chemicals on the produced paper is very appropriate, and most paper mills perform surface treatment (or surface sizing).
전분은 백상지, 신문용지, 산업용지 등 거의 모든 종이의 표면처리에 이용되는 범용 약품이다. 전분은 옥수수, 감자, 타피오카 등의 식물로부터 추출하는 천연고분자로서 이를 산화 또는 양성화시켜 사용한다.Starch is a general-purpose drug used for surface treatment of almost all paper such as woodfree paper, newspaper paper, and industrial paper. Starch is a natural polymer extracted from plants such as corn, potatoes, tapioca and the like and used by oxidizing or positing it.
젤라틴은 동물의 뼈 등으로부터 추출한 동물성 단백질의 일종으로 종이의 내구성을 향상시키기 위하여 특수한 용도의 종이 제조에 이용된다. 즉, 화폐 또는 유가증권용지 등과 같이 유통 내구성이 요구되는 종이를 제조할 때 표면처리제로 이용된다. 그러나 젤라틴으로 표면처리를 할 경우 종이가 매우 빳빳하여 품위가 떨어질 뿐만 아니라 인쇄적성이 떨어져 고정밀 인쇄를 할 경우 인쇄결함이 발생될 위험성이 있다. 또한 젤라틴 표면처리를 하면, 포름알데히드 등으로 젤라틴을 경화시키는 공정이 필요하게 된다. 이 약품으로부터 발생되는 포름알데히드 기체는 자극성 취기와 함께 매우 위험한 발암 물질로서 작업자의 안전에 많은 위험성을 내포하고 있다. 따라서 현재는 젤라틴의 표면처리를 지양하는 추세이므로, 젤라틴 표면처리의 대체방법으로 독성이 낮은 폴리비닐알콜 고분자를 종이에 표면처리하고 있다. 그러나 폴리비닐알콜로 종이를 표면처리하게 되면 젤라틴으로 처리하였을 경우보다는 양호하지만, 여전히 종이가 빳빳하고 인쇄적성이 떨어진다. 또한 젤라틴으로 처리하였을 경우보다 유통 내구성이 낮은 단점이 있다.Gelatin is a kind of animal protein extracted from animal bones and the like, and is used in the manufacture of paper for special purposes to improve the durability of paper. That is, it is used as a surface treatment agent when manufacturing paper which requires circulation durability such as money or securities paper. However, if the surface treatment with gelatin, the paper is very thin, the quality is not only degraded, the printability is low, there is a risk of printing defects when high-precision printing. Moreover, when gelatin surface treatment is performed, a step of curing gelatin with formaldehyde or the like is required. Formaldehyde gas from this drug is a very dangerous carcinogen with irritating odor and poses many dangers to the safety of workers. Therefore, the current trend is to avoid the surface treatment of gelatin, a low-toxic polyvinyl alcohol polymer is surface-treated on paper as an alternative method of gelatin surface treatment. However, the surface treatment of the paper with polyvinyl alcohol is better than the treatment with gelatin, but the paper is still thin and the printability is poor. In addition, there is a disadvantage in that the distribution durability is lower than when treated with gelatin.
한편, 종이는 제조특성상 방향성을 가지는 특성을 가진다. 즉 종이를 제조하기 위한 최종 지료가 장망의 헤드박스(headbox) 또는 환망받드(cylinder vat)에 담겨진 후 금망에서 탈수되는 과정에서 지료의 대부분을 구성하는 펄프 섬유가 초기기의 기계방향으로 배열되게 된다. 따라서 제조된 종이에는 기계방향(machine direction, MD)과 폭방향(crossmachine direction, CD)의 특성이 각각 다르게 나타난다. 일예로 제조된 종이의 인장강도, 내절도 등은 기계방향이 폭방향 보다 크게 나타나나, 인열강도는 폭방향이 크게 나타나는 성질을 가진다. 이와 같은 종이의 방향성은 인쇄할 때의 종이 급지, 사용용도 등에 따라 장점으로 작용할 수도 있으나, 은선(화폐 및 유가증권의 위조를 방지하기 위하여 용지의 기계방향으로 삽입되는 폭 0.5∼5mm의 필름) 등이 삽입된 용지에서는 주로 관리하는 내절도 방향이 기계방향에서 폭방향으로 바뀌기 때문에 단점으로 작용한다. 즉 은선이 삽입되지 않은 화폐 또는 유가증권 용지는 접히는 방향이 기계방향으로 접히게 인쇄되지만, 은선이 삽입되는 화폐 또는 유가증권 용지는 접히는 방향이 폭방향으로 접히게 인쇄될 수 밖에 없으므로, 종이의 폭방향 성질을 중점 관리하게 된다.On the other hand, paper has a characteristic of having a direction in the manufacturing characteristics. In other words, the pulp fibers that make up the majority of the paper are arranged in the machine direction of the initial stage when the final paper for manufacturing paper is contained in a long-term headbox or blinder vat and then dewatered from the gold net. . Therefore, the paper produced has different characteristics of machine direction (MD) and crossmachine direction (CD). Tensile strength, theft resistance, etc. of the paper produced as an example, the machine direction is larger than the width direction, but the tear strength has a property that the width direction is larger. Orientation of the paper may act as an advantage depending on the paper feed and use of printing, but the hidden line (0.5 ~ 5mm width film inserted in the machine direction of the paper to prevent counterfeiting of money and securities), etc. This inserted paper is a disadvantage because the direction of internally controlled theft is changed from the machine direction to the width direction. In other words, the money or securities paper without a hidden line is printed so that the folding direction is folded in the machine direction, but the money or securities paper where the hidden line is inserted must be printed so that the folding direction is folded in the width direction. Emphasis is placed on direction properties.
고급 종이의 제조방법으로 다양한 기술이 연구되어 오고 있다. 예를 들어, 일본국 특개평 7-229085호에는 프린터 인쇄용지 및 그라비아 인쇄용지의 제조방법이 기재되어 있으며, 폴리비닐알콜과 글리세린 혼합용액을 백상지 원지에 처리하여 부드럽고 탄성이 좋으며 인쇄 재현성이 좋은 용지를 제조하는 방법이 언급되어 있다. 또한, 일본국 특개평 7-109694호에는 화장지 제조시 0.1∼10%의 글리세린 또는 폴리글리세린을 첨가하여 유연하고 보습력이 우수한 화장지를 제조하는 방법이 기재되어 있으나, 이는 화장지에 국한되어 있다.Various techniques have been studied as a method of manufacturing high-quality paper. For example, Japanese Patent Application Laid-Open No. 7-229085 describes a method for manufacturing a printer printing paper and a gravure printing paper, and a polyvinyl alcohol and glycerin mixed solution is treated on a white paper, which is soft and elastic and has good print reproducibility. Mention is made of the process for the preparation. In addition, Japanese Patent Application Laid-open No. Hei 7-109694 discloses a method for producing toilet paper having excellent flexibility and moisturizing ability by adding 0.1 to 10% of glycerin or polyglycerin when preparing toilet paper, but it is limited to toilet paper.
또한 한국특허 제217386호에는 글리세린의 함량을 증가시켜 종이의 유연성 증가에 의한 내절도 향상 방법이 기재되어 있지만, 이 방법에 의해 제조된 종이는 수분에 의한 변화가 많고 종이가 너무 유연하여 고속인쇄에 부적합할 뿐만 아니라 고압인쇄시 종이가 불균일하게 신장되어 인쇄시의 맞춤불량이 많이 발생하는 문제가 있다.In addition, Korean Patent No. 217386 describes a method of improving the abrasion resistance by increasing the content of glycerin to increase the flexibility of the paper, but the paper produced by this method has a lot of changes due to moisture and the paper is too flexible to provide high speed printing. Not only is it unsuitable but there is a problem that a large amount of misalignment occurs during printing due to uneven stretching of paper during high pressure printing.
따라서, 본 발명의 목적은 상기 종래기술의 문제점을 해결하고, 용지의 표면처리에 의해 종이의 내절도가 상승되고 기계방향과 폭방향의 내절도 차이를 감소시키며, 인쇄적성과 고압의 요판인쇄에 의한 치수안정성이 향상된 종이의 제조방법을 제공하는데 있다.Therefore, an object of the present invention is to solve the problems of the prior art, the surface resistance of the paper is increased by the surface treatment of the paper, and the difference in the resistance between the machine direction and the width direction is reduced, and the printability and intaglio printing of high pressure It is to provide a method for producing a paper with improved dimensional stability.
상기 목적을 달성하기 위한 본 발명의 제조방법은, 면섬유를 고해도가 18∼20°SR이 될 때까지 고해하고 이를 고해도가 40∼60°SR이 될 때까지 리파이닝하여 미세섬유 함량이 40% 이하인 펄프를 제조하고, 펄프의 100 건조중량부에 대해 유/무기 충전제 5∼10중량부 및 습윤지력증강제 0.3∼0.5중량부를 첨가하여 지료를 조성한 후, 물을 첨가하여 0.1∼0.3%의 농도로 희석하고 환망받드(cylinder vat)에 유입시키면서 1mm 폭의 은선이 삽입되는 습지를 제조하고, 이를 압착 및 건조시켜 원지를 제조하는 단계; 제1표면처리제 수용액 총량에 대해 폴리비닐알콜 2∼5중량%, 습윤지력증강제 0.1∼1.0중량%, 요소 1.0∼5.0중량%, 글리세린 0∼10중량% 및 나머지의 물을 첨가 및 혼합하여 제1표면처리제 수용액을 제조하여 상기 원지를 침지시키고 제1표면처리한 후 압착롤을 통과시켜 과량의 표면처리제를 제거시키는 단계; 제2표면처리제 수용액 총량에 대해 붕사 2∼5중량%, 글리세린 2∼5중량% 및 나머지의 물을 첨가 및 혼합하여 제2표면처리제 수용액을 제조하여 상기 제1표면처리된 원지를 침지시키고 압착롤을 통과시켜 과량의 표면처리제를 제거시키는 단계; 및 제2표면처리된 원지를 건조 및 조습시키는 단계로 이루어진다.In the production method of the present invention for achieving the above object, the fine fiber content 40% by refining the cotton fiber until the high degree of high temperature is 40 ~ 60 ° SR The pulp was prepared, 5 to 10 parts by weight of organic / inorganic filler and 0.3 to 0.5 parts by weight of wet strength enhancer were added to 100 parts by weight of pulp to form a paper, followed by the addition of water to a concentration of 0.1 to 0.3%. Preparing a wetland into which a 1 mm wide silver wire is inserted while diluting and flowing into a cylinder vat; 2 to 5% by weight of polyvinyl alcohol, 0.1 to 1.0% by weight of wet strength enhancer, 1.0 to 5.0% by weight of urea, 0 to 10% by weight of glycerin and the remaining water are added and mixed with respect to the total amount of the first surface treatment agent aqueous solution. Preparing an aqueous solution of a surface treating agent to immerse the base paper, and after the first surface treatment, remove the excess surface treating agent by passing through a pressing roll; 2 to 5% by weight of borax, 2 to 5% by weight of glycerin and the remaining water were added and mixed with respect to the total amount of the second surface treatment solution to prepare a second surface treatment solution, so as to immerse the first surface treated base paper and press the roll. Passing through to remove excess surface treatment agent; And drying and humidifying the second surface-treated paper.
이하, 본 발명을 좀 더 구체적으로 설명한다.Hereinafter, the present invention will be described in more detail.
본 발명은 종래기술과는 종이원지의 처리방법 자체가 상이할 뿐만 아니라, 표면처리제의 성분 및 조성이 상이하다.The present invention not only differs in the method of treating the paper base itself from the prior art, but also in the composition and composition of the surface treating agent.
우선, 본 발명에 따른 원지의 제조방법을 살펴보면, 종래의 방법과는 달리 면섬유의 고해시간을 단축하여 고해도가 18∼20°SR이 될 때까지 고해시키고 이를 고해도가 40∼60°SR이 될 때까지 리파이닝하여 미세섬유 함량이 40% 이하인 펄프를 제조한다. 이렇게 준비된 펄프의 100 건조중량부에 대해 유/무기 충전제 5∼10중량부 및 습윤지력증강제 0.3∼0.5중량부를 첨가하여 지료를 조성한 후, 물을 첨가하여 0.1∼0.3%의 농도로 희석하고 환망 받드에 유입시키면서 1mm 폭의 은선이 삽입되는 습지를 제조하고, 이를 압착 및 건조시켜 원지를 제조한다.First, looking at the manufacturing method of the base paper according to the present invention, unlike the conventional method, by shortening the beating time of the cotton fiber beating until the altitude is 18 to 20 ° SR and this high degree of 40 to 60 ° SR Refine until it produces a pulp with a microfiber content of 40% or less. 5 to 10 parts by weight of organic / inorganic filler and 0.3 to 0.5 part by weight of wet strength enhancer were added to 100 parts by weight of the prepared pulp to form a paper, followed by dilution to a concentration of 0.1 to 0.3% by adding water. The wetland is inserted into a silver wire having a width of 1 mm while being introduced into the wetland, which is compressed and dried to prepare a base paper.
원지의 제조시 고해단계에서 고해도가 20°SR을 초과할 때까지 고해시킨 다음 리파이닝으로 고해도를 조정하면 섬유의 손상이 많아지고 결과적으로는 내절도 같은 원지의 강도가 저하되는 문제가 있으며, 이 때 미세섬유의 함량이 40%를 초과하면 초지시 탈수가 저하되는 문제가 발생한다. 또한, 원지 제조시에 유/무기 충전제와 습윤지력증강제를 첨가하는데, 펄프 100 건조중량부에 대해 유/무기 충전제의 사용량이 5중량부 미만이면 광학적 특성이 떨어지게 되며, 사용량이 10중량부를 초과하면 원지의 전체적인 물성이 낮아지게 된다. 이와 함께 습윤지력증강제의 사용량이 0.3중량부 미만이면 은행권 용지 같은 고내구성을 요구하는 종이에 있어서 물에 의한 젖음 특성이 낮아지고, 0.5중량부를 초과하면 지합 등 종이의 품질에 중요한 문제가 발생된다.In the manufacture of paper, beating until the high degree of frosting exceeds 20 ° SR and then adjusting the high degree of refining, resulting in more damage to the fiber and consequently lowering the strength of raw paper such as theft. At this time, if the content of the microfibers exceeds 40%, dehydration occurs during papermaking. In addition, organic / inorganic fillers and wet strength enhancers are added during the manufacture of raw paper. When the amount of organic / inorganic filler is less than 5 parts by weight based on 100 parts by weight of pulp, the optical properties are deteriorated. The overall physical properties of the paper will be lowered. In addition, when the amount of the wet strength enhancer is less than 0.3 parts by weight, the wettability characteristic of water is lowered in papers requiring high durability, such as banknote paper, and when it exceeds 0.5 parts by weight, an important problem occurs in the quality of paper such as paper.
본 발명에서 사용할 수 있는 유/무기 충전제는 탈크, 백토, 탄산칼슘, 이산화티탄 및 화이트카본 등으로 이루어진 군으로부터 적어도 하나 이상 선택된다.Organic / inorganic fillers usable in the present invention are selected from the group consisting of talc, clay, calcium carbonate, titanium dioxide, white carbon and the like.
본 발명에서 사용할 수 있는 습윤지력증강제는 특별히 한정되는 것은 아니지만, 요소 포름알데히드수지, 멜라민 포름알데히드수지, 에폭시계 수지류의 폴리아미드계 수지, 폴리아민계 등을 들 수 있다. 그러나, 본 발명은 섬유의 처리방법과 표면처리 방법개선을 통한 종이의 제조방법으로 이러한 원지 제조상의 원료조성과 조성비율은 별도로 한정되지는 않지만, 습윤지력증강제의 경우, 에폭시수지류인 폴리아미드계 수지를 사용하였다.The wet strength enhancer that can be used in the present invention is not particularly limited, but examples thereof include urea formaldehyde resins, melamine formaldehyde resins, polyamide resins of epoxy resins, and polyamine resins. However, the present invention is a method of manufacturing paper through improving the processing method of the fiber and the surface treatment method, but the raw material composition and composition ratio in the production of such paper is not particularly limited, in the case of the wet strength enhancer, polyamide type of epoxy resin Resin was used.
본 발명에 따른 종이는 상기 방법으로 제조된 원지를 제1표면처리단계 및 제2표면처리단계를 거쳐 제조하게 된다.The paper according to the present invention is produced through the first surface treatment step and the second surface treatment step produced by the above method.
상기 제1표면처리제는 전술한 바와 같이 폴리비닐알콜(PVA), 습윤지력증강제, 요소(urea), 글리세린, 물을 적정 혼합비율로 혼합하여 수용액으로 제조하는데, 제1표면처리제 수용액 총량에 대해 폴리비닐알콜을 2중량% 미만으로 첨가하면 원지내로의 폴리비닐알콜 용액의 침투는 용이하나 종이표면과 종이내에 충분한 필름 형성에 어려운 문제가 있고, 5중량%를 초과하여 사용하면 농도가 너무 높아 용지 내부로의 고른 침투가 어려운 문제가 있다. 또한, 습윤지력증강제는 원지 제조시 사용되는 성분들 중에서 선택하여 사용할 수 있으며 사용량은 제1표면처리제 수용액 총량에 대해 0.1∼1.0중량%가 바람직한데, 0.1중량% 미만이면 내수성이 충분하지 못하고, 1.0중량%를 초과하면 표면처리시 표면처리용액이 침투가 잘 되지 않는 문제가 발생하게 된다. 한편, 요소(urea)의 사용량은 제1표면처리제 수용액 총량에 대해 1∼5중량%가 바람직한데, 1중량% 미만이거나, 5중량%를 초과하면 충분한 효과가 발현되지 못한다. 또한, 글리세린은 제1표면처리제 수용액 총량에 대해 0∼10중량%로 사용하는 것이 바람직하며, 10중량%를 초과하면 내절도는 증가하나 수분에 의한 변화에 민감하고 종이가 너무 유연하여 고속인쇄에 부적합하고 고압 인쇄시 종이의 불균일한 신장을 유발, 인쇄에서 맞춤 불량을 유발하게 된다. 이러한 성분을 갖는 제1표면처리제 수용액에 상기 방법으로 제조된 원지를 침지시켜 처리시킨 후, 압착롤을 통과시켜 과량의 표면처리제는 제거하게 된다.The first surface treatment agent is prepared as an aqueous solution by mixing polyvinyl alcohol (PVA), wet strength enhancer, urea, glycerin, and water in an appropriate mixing ratio as described above. When the vinyl alcohol is added in less than 2% by weight, the polyvinyl alcohol solution is easily penetrated into the paper, but there is a problem in forming a sufficient film on the paper surface and the paper, and when used in excess of 5% by weight, the concentration is too high. There is a problem that even penetration into the interior is difficult. In addition, the wet strength enhancer can be selected from the components used in the manufacture of the base paper, the amount of use is preferably 0.1 to 1.0% by weight relative to the total amount of the first surface treatment agent aqueous solution, if less than 0.1% by weight is not enough water resistance, 1.0 If the weight percentage is exceeded, the surface treatment solution may not penetrate well during surface treatment. On the other hand, the amount of urea (urea) is preferably 1 to 5% by weight relative to the total amount of the first surface treatment agent aqueous solution, if less than 1% by weight, or more than 5% by weight does not exhibit a sufficient effect. In addition, glycerin is preferably used in an amount of 0 to 10% by weight based on the total amount of the first surface treatment solution, and when it is more than 10% by weight, the theft resistance is increased, but it is sensitive to changes caused by moisture and the paper is too flexible. Inadequate and high pressure printing causes uneven stretching of the paper, resulting in misalignment in printing. After treating the base paper produced by the above method in an aqueous solution of the first surface treatment agent having such a component, the excess surface treatment agent is removed by passing through a pressing roll.
또한 상기 제2표면처리제는 붕사, 글리세린 및 물을 첨가 및 혼합하여 수용액으로 제조하는데, 제2표면처리제 수용액 총량에 대해 붕사를 2중량% 미만으로 첨가하면 제시된 침투된 표면처리 용액이 충분히 경화되지 않은 문제가 있고, 5중량%를 초과하여 사용하면 인쇄시 과도한 경화로 인쇄적성이 저하되는 문제가 있다. 또한 글리세린을 제2표면처리제 수용액 총량에 대해 2중량% 미만으로 사용하면 섬유의 유연성이 저하되어 내절도 같은 종이의 물성이 떨어지며, 5중량%를 초과하면 내절도는 증가하지만 수분에 의한 변화에 민감하고 종이가 너무 유연하여 고속인쇄에 부적합하고 고압 인쇄시 종이의 불균일한 신장을 유발, 인쇄에서 맞춤 불량을 유발하게 된다. 이러한 성질은 제1표면처리시 발생하는 특성보다 그 효과가 크다. 이러한 성분을 갖는 제2표면처리제 수용액에 상기 제1표면처리된 원지를 침지시켜 처리시킨 후, 압착롤을 통과시켜 과량의 표면처리제는 제거하게 된다.In addition, the second surface treatment agent is prepared as an aqueous solution by adding and mixing borax, glycerin, and water. When the borax is added in an amount less than 2% by weight based on the total amount of the second surface treatment agent solution, the impregnated surface treatment solution may not be sufficiently cured. There is a problem, and when used in excess of 5% by weight there is a problem that the printability is reduced due to excessive curing during printing. In addition, when glycerin is used in an amount less than 2% by weight based on the total amount of the second surface treatment agent, the flexibility of the fiber is reduced, and the physical properties of the same paper are reduced, and when it exceeds 5% by weight, the resistance is increased but sensitive to changes due to moisture. The paper is so flexible that it is unsuitable for high speed printing and causes uneven elongation of the paper during high pressure printing, resulting in misalignment in printing. This property is more effective than the property generated during the first surface treatment. After treating the first surface treated base paper by immersing in a second surface treatment agent aqueous solution having such a component, it is passed through a pressing roll to remove excess surface treatment agent.
본 발명에 따른 방법으로 표면처리된 원지를 건조 및 조습시켜서 종이를 제조하게 되는데, 본 발명의 방법에 따라 제조된 종이는 기계방향과 폭방향 내절도 차이를 줄일 수 있을 뿐만 아니라, 잉크 흡수성이 향상되어 미세한 선 또는 문자가 인쇄되는 은행권 또는 유가증권에서 선끊어짐 등과 같은 인쇄결점을 방지할 수 있는 효과를 가져올 수 있다. 또한 종이내의 보습력을 향상시켜 종이내의 수분이 감소되었을 때 발생하기 쉬운 정전기를 방지할 수 있는 효과를 얻을 수 있다. 또한 종이 폭방향 강도가 향상되어 고압 요판인쇄에 의한 종이 신장을 감소시킬 수 있는 효과도 얻을 수 있다.The paper produced by drying and humidifying the surface treated by the method according to the invention to produce a paper, the paper produced according to the method of the present invention not only can reduce the difference in the machine direction and width direction abrasion resistance, but also improve the ink absorption As a result, printing defects such as line breaks in banknotes or securities in which fine lines or characters are printed may be prevented. In addition, by improving the moisturizing power in the paper it is possible to obtain an effect that can prevent the static electricity easily generated when the moisture in the paper is reduced. In addition, the paper width direction strength is improved to obtain the effect of reducing the paper elongation by high-pressure intaglio printing.
이하, 실시예를 통해 좀 더 구체적으로 설명하지만, 이에 본 발명이 한정되는 것은 아니다.Hereinafter, the present invention will be described in more detail, but the present invention is not limited thereto.
제조실시예 1Preparation Example 1
증해 표백된 면섬유를 3.5%의 농도로 20oSR까지 고해기에서 고해시킨 후 55oSR까지 리파이너에서 리파이닝하여 펄프를 제조하고, 펄프의 100 건조중량부에 대하여 이산화티탄 및 화이트카본 6.5부, 에폭시계 수지(kymen 557H, Hercules사) 0.5부를 첨가하여 지료를 조성하였다. 여기에 물을 첨가하여 0.2%로 희석한 후 환망받드에 계속적으로 유입시키면서 1mm폭의 은선이 기계방향으로 삽입된 습지를 제조하였으며, 압착과 건조를 실시하여 원지를 제조하였다.The pulp is prepared by beating the bleached cotton fiber at a concentration of 3.5% in an incubator up to 20 o SR, and then refined in a refiner to 55 o SR, and 6.5 parts of titanium dioxide and white carbon, 100 parts by weight of the pulp are dried. 0.5 parts of system resin (kymen 557H, Hercules) was added to form a stock. After diluting to 0.2% by adding water thereto, the wetland in which 1 mm wide silver wire was inserted in the machine direction while continuously flowing into the ring support was manufactured.
제조비교예 1Comparative Example 1
증해 표백된 면섬유를 3.5%의 농도로 30oSR까지 고해기에서 고해시킨 후 60oSR까지 리파이너에서 리파이닝하여 펄프를 제조하고, 펄프의 100 건조중량부에 대하여 이산화티탄 및 화이트카본 6.5부, 에폭시계 수지(kymen 557H, Hercules사) 1.0부를 첨가하여 지료를 조성한 것을 제외하고는 상기 제조실시예 1과 동일하게 실시하여 원지를 제조하였다.A cooking bleached cotton fibers at a concentration of 3.5% 30 o SR until after beating in beaten group to 60 o SR by refining in a refiner to prepare a pulp, 100 dry parts by weight of titanium dioxide, and white carbon, 6.5 parts with respect to the pulp, an epoxy A base paper was prepared in the same manner as in Preparation Example 1, except that 1.0 part of the system resin (kymen 557H, Hercules) was added to form a paper.
실시예 1Example 1
제1표면처리제 수용액 총량에 대해 폴리비닐알콜 4.0%, 습윤지력증강제(Kymen 557H, Hercules사 제품) 0.4% 및 공업용 요소 1.25%를 나머지의 물에 90∼99℃로 용해시킨 제1표면처리제 수용액에 60℃의 온도에서 상기 제조실시예 1에서 제조된 원지를 침지시킨 후, 압착롤에 통과시켜 과량의 표면처리제를 제거하고, 상온에서 이를 즉시 제2표면처리제 수용액 총량에 대해 붕사 2.5%, 글리세린 3% 및 나머지의 물을 혼합하여 제조된 제2표면처리제에 침지시킨 후 압착롤에 통과시켜 과량의 표면처리제를 제거하고, 건조시켜 최종 용지를 제조하였다.To the first surface treatment solution in which 4.0% of polyvinyl alcohol, 0.4% of wet strength enhancer (Kymen 557H, manufactured by Hercules), and 1.25% of industrial urea were dissolved in the remaining water at 90 to 99 ° C based on the total amount of the first surface treatment solution. After dipping the base paper prepared in Preparation Example 1 at a temperature of 60 ° C., the excess surface treatment agent was removed by passing through a pressing roll, and at room temperature, it was immediately borax 2.5% based on the total amount of the second surface treatment solution, glycerin 3 After immersing in the second surface treatment agent prepared by mixing the% and the remaining water, and passed through the pressing roll to remove the excess surface treatment agent, and dried to prepare a final paper.
실시예 2Example 2
요소를 2.5%로 첨가한 것을 제외하고는 상기 실시예 1과 동일하게 실시하였다.The same procedure as in Example 1 was conducted except that 2.5% of urea was added.
실시예 3Example 3
요소를 3.75%로 첨가한 것을 제외하고는 상기 실시예 1과 동일하게 실시하였다.The same procedure as in Example 1 was conducted except that urea was added at 3.75%.
비교예 1Comparative Example 1
상기 제조비교예 1에서 제조된 원지를 사용하고, 제1표면처리제에 요소, 제2표면처리제에 글리세린을 첨가하지 않은 것을 제외하고는 상기 실시예 1과 동일하게 실시하였다.Example 1 was carried out in the same manner as in Example 1, except that glycerol was not added to the first surface treatment agent and urea and the second surface treatment agent were used.
비교예 2Comparative Example 2
제1표면처리제에 요소를 첨가시키지 않은 것을 제외하고는 상기 실시예 1과 동일하게 실시하였다.The same process as in Example 1 was carried out except that no urea was added to the first surface treatment agent.
비교예 3Comparative Example 3
제2표면처리단계를 거치지 않고 제1표면처리 후 건조시켜 최종 용지를 제조한 것을 제외하고는 상기 비교예 1과 동일하게 실시하였다.The same process as in Comparative Example 1 was carried out except that the final paper was prepared by drying after the first surface treatment without passing through the second surface treatment step.
상기 실시예 및 비교예를 통해 얻어진 용지의 내절도 및 인쇄시 신장율 등을 측정하여 하기 표 1에 비교하여 나타내었다.The cut resistance and elongation rate of the paper obtained through the examples and the comparative examples were measured and shown in Table 1 below.
* 물성측정방법 ** Property Measurement Method *
1. 내절도(단위: 회수)1. Internal Theft (Unit: Recovery)
:제조된 종이를 기계방향과 폭방향으로, 폭 15mm, 길이 100mm로 단재하여 Schopper type 내절도 측정기를 사용하여 종이의 접힘 회수를 측정.: Measure the number of folds of paper using Schopper type abrasion resistance tester by cutting manufactured paper in machine direction and width direction, width 15mm, length 100mm.
2. 신장율(단위: %)2. Elongation rate (unit:%)
:제조된 종이를 폭방향 650mm로 단재하여 50톤 하중의 요판인쇄를 하였을 경우에, 종이가 폭방향으로 신장된 비율을 측정.: When the produced paper was cut in the width direction of 650 mm and intaglio printing with a 50 ton load was measured, the ratio of the paper elongated in the width direction was measured.
3. 두께감소율(단위: %)3. Thickness reduction rate (unit:%)
:제조된 종이를 폭방향 650mm로 단재하여 50톤 하중의 요판인쇄를 하였을 경우에, 종이가 두께방향으로 감소된 비율을 측정.: When the produced paper was cut in the width direction of 650 mm and intaglio printing with a 50 ton load was measured, the rate at which the paper was reduced in the thickness direction was measured.
상기 표 1로부터 알 수 있는 바와 같이, 본 발명에 따른 종이가 비교예의 종이에 비해 내절도도 많이 상승되었으며, 특히 상대적으로 약한 폭방향 내절도의 경우도 크게 상승하였다. 고압 요판인쇄에서도 폭방향으로의 신장율이 감소되었고, 또한 종이의 두께 감소가 적어지고, 이에 따라 종이의 촉감도 향상되었을 뿐만 아니라, 인쇄 선명성이 좋아졌으며, 흡유도와 잉크 수리성 등이 향상되었다. 또한 종이의 정전기가 감소되는 효과도 얻었다.As can be seen from Table 1, the paper according to the present invention was much higher in abrasion resistance than the paper of the comparative example, especially in the case of a relatively weak width in the longitudinal direction. Even in high-pressure intaglio printing, the elongation in the width direction was reduced, and the thickness of the paper was decreased, thereby not only improving the feel of the paper but also improving the print clarity, oil absorption, ink repairability, and the like. It also has the effect of reducing the static electricity of the paper.
상기 실시예 및 비교예를 통해 알 수 있는 바와 같이, 본 발명에 따라 제조된 용지는 기계방향과 폭방향의 내절도 차이를 감소시키고, 또한 내절도를 많이 향상시킬 뿐만 아니라, 잉크흡수성을 향상시켜 미세한 선 또는 문자가 인쇄되는 은행권 또는 유가증권에서 선끊어짐 등과 같은 인쇄결점을 방지할 수 있는 효과를 가져올 수 있다. 또한 종이내의 보습력을 향상시켜 종이내의 수분이 감소되었을 때 발생하기 쉬운 정전기를 방지할 수 있는 효과를 얻을 수 있다. 또한 종이 폭방향 강도가 향상되어 고압 요판인쇄에 의한 종이 신장을 감소시킬 수 있는 효과도 얻을 수 있다.As can be seen from the above examples and comparative examples, the paper produced in accordance with the present invention not only reduces the difference in the abrasion resistance in the machine direction and the width direction, but also improves the abrasion resistance a lot, and also improves the ink absorption. It may have an effect of preventing printing defects such as line breaks in banknotes or securities in which fine lines or characters are printed. In addition, by improving the moisturizing power in the paper it is possible to obtain an effect that can prevent the static electricity easily generated when the moisture in the paper is reduced. In addition, the paper width direction strength is improved to obtain the effect of reducing the paper elongation by high-pressure intaglio printing.
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|---|---|---|---|---|
| JPH05104848A (en) * | 1991-10-15 | 1993-04-27 | Sanyo Kokusaku Pulp Co Ltd | Ink jet recording paper |
| JPH07109692A (en) * | 1993-10-14 | 1995-04-25 | Nippon P M C Kk | Composition for improvement of paper surface quality |
| KR960006128A (en) * | 1994-07-22 | 1996-02-23 | 이형도 | Dielectric filter |
| JPH08100388A (en) * | 1993-09-30 | 1996-04-16 | Ricoh Co Ltd | Material for recording and recycling of material for recording holding image |
| KR0181772B1 (en) * | 1990-11-30 | 1999-05-15 | 이민희 | Dustless paper and compositions of impregnating solution for it |
| JP2000096489A (en) * | 1998-09-29 | 2000-04-04 | Seiko Kagaku Kogyo Co Ltd | Surface treating agent for paper |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0181772B1 (en) * | 1990-11-30 | 1999-05-15 | 이민희 | Dustless paper and compositions of impregnating solution for it |
| JPH05104848A (en) * | 1991-10-15 | 1993-04-27 | Sanyo Kokusaku Pulp Co Ltd | Ink jet recording paper |
| JPH08100388A (en) * | 1993-09-30 | 1996-04-16 | Ricoh Co Ltd | Material for recording and recycling of material for recording holding image |
| JPH07109692A (en) * | 1993-10-14 | 1995-04-25 | Nippon P M C Kk | Composition for improvement of paper surface quality |
| KR960006128A (en) * | 1994-07-22 | 1996-02-23 | 이형도 | Dielectric filter |
| JP2000096489A (en) * | 1998-09-29 | 2000-04-04 | Seiko Kagaku Kogyo Co Ltd | Surface treating agent for paper |
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