KR870002128B1 - Reproduction method of plastic-coated paper - Google Patents

Reproduction method of plastic-coated paper Download PDF

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Publication number
KR870002128B1
KR870002128B1 KR1019850003570A KR850003570A KR870002128B1 KR 870002128 B1 KR870002128 B1 KR 870002128B1 KR 1019850003570 A KR1019850003570 A KR 1019850003570A KR 850003570 A KR850003570 A KR 850003570A KR 870002128 B1 KR870002128 B1 KR 870002128B1
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pulp
waste paper
synthetic resin
solution
temperature
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KR1019850003570A
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Korean (ko)
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KR860009189A (en
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김종철
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김종철
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    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C5/00Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/02Working-up waste paper
    • 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
    • Y02W30/64Paper recycling

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  • Processing Of Solid Wastes (AREA)

Abstract

In the method, an aqueous solution is prepared to contain sodium hypochlorite 10-30kg, caustic soda 1-3kg, penetrant in small amount in 5 tons of water and is added with 200kg of waste paper of polyethylene coating. The solution is kept at 30-60 deg.C while the waste paper is pulped by a high speed pulper, and is passed through a filter to recover the cemichals in solution. The solid pulp after filtering is washed and screened with a suitable pulp concentration to recover the pulp removed of the resin coating.

Description

합성수지 피막폐지의 재생방법Recycling method of waste paper

본 발명은 합성수지가 피막된 컵원지, 카톤팩 및 기타지류의 스크랩이나 사용할 수 없는 폐지를 화학적인 방법과 기계적인 방법을 병행하여 박막의 합성수지필름을 분리함과 동시에 펄프를 얻는 방법에 관한 것이다.The present invention relates to a method of obtaining a pulp at the same time separating the synthetic resin film of a thin film by using a chemical method and a mechanical method in combination with a scrap of paper base, carton pack, and other papers coated with synthetic resin, or waste paper.

종래의 폐지 이용방법에 있어서는 합성수지를 피막하지 않은 지류들이므로 일반적으로 폐지를 팔파에서 파쇄하여 세정처리탈묵 및 표백처리과정등을 거치므로서 재사용할 수 있는 펄프를 얻을 수 있었으나 근래 내습 및 내수성의 포장용기 수요가 증가함에 따라 합성수지를 피막시킨 지류의 사용이 급증하게 되었고 또 이와 같은 지류의 재생방법도 필요하게 되었다.In the conventional method of using waste paper, since the paper is not coated with synthetic resin, the waste paper is generally crushed in Palpa, and thus, pulp that can be reused can be obtained by degreasing and bleaching treatment. As the demand for containers increased, the use of feeders coated with synthetic resins increased rapidly, and the recycling method of such feeders also became necessary.

예를들면 일본특허공보소 46-30961호는 술파민산의 펄퍼작업시 첨가로 사이징제인 요소나 메라민 수지를 붕괴 제거할 수 있으나 수지가 피막으로 덮여진 최근의 컵원지, 카톤팩등에는 효과가 없었다.For example, Japanese Patent Publication No. 46-30961 can disintegrate and remove sizing agent urea and melamine resin by adding during the pulpering operation of sulfamic acid, but it has no effect on recent cup bases, carton packs, etc., in which the resin is covered with a film. .

최근 이와 같은 합성수지 피막지류의 재생방법으로 개발된 방법은 폐지를 고압하에서 100℃ 이상의 온도에서 증자하여 용융된 수지층을 분리제거하므로서 펄프를 얻는 용융분리 방법이 있으나 수지의 용융점에 달하는 온도까지 상승시켜야 하므로 고압을 요하게되고 용융분리된 수지층에 펄프가 혼입되므로서 펄프의 손실이 크다는 결점이 있었다.Recently, the method developed as a regeneration method of synthetic resin film paper has a melt-separation method to obtain pulp by separating and removing the molten resin layer by increasing the waste paper at a temperature of 100 ° C. or higher under high pressure, but raising the temperature to reach the melting point of the resin. As a result, high pressure is required and pulp is mixed in the resin layer separated from the melt, resulting in a large loss of pulp.

본 발명은 고온 고압을 요하지 않고 펄프손실이 거의 없는 화학적인 방법과 기계적인 방법을 병행하는 개량된 방법으로 이를 구체적으로 설명하면 다음과 같다.The present invention is described in detail as an improved method of using both a chemical method and a mechanical method, which do not require high temperature and high pressure, and have little pulp loss.

본 발명에 의한 처리방법은 차아염소산소다 10-30㎏, 가성소다 1-3㎏, 미량의 침투제를 5톤의 물에 용해시키고 100-300㎏의 합성수지 피막폐지를 투입하여 고속팔파로 1-2시간 고해하여 해서한 다음 여과하여 약액을 회수하고 고형분은 수세한 다음 적당량의 물과 함께 스크린을 통과시켜 합성수지 필름피막을 제거하므로서 펄프를 회수하는 방법이라 할수 있다.The treatment method according to the present invention dissolves 10-30 kg of sodium hypochlorite, 1-3 kg of caustic soda, and a small amount of penetrant in 5 tons of water, and puts 100-300 kg of synthetic resin film waste paper into a high speed swelling 1-2. It is a method of recovering pulp by removing the synthetic resin film by passing through the screen with an appropriate amount of water, and then washing the solid with filtration after filtering by time.

전술한 방법에서 가성소다 용액은 섬유의 팽윤성을 크게하고 일반적인 사이징제인 송지를 용해하는 기능을 동시에 부여하므로서 해서를 촉진시킬 수 있으며 차아염소산소다는 습강지 또는 내수지의 사이징용으로 사용된 요소수지 혹은 메라민수지를 용해시킴과 동시에 표백효과도 부여하고 있다.In the above-mentioned method, caustic soda solution can promote sea swelling by simultaneously increasing the swelling property of the fiber and dissolving the pine smelting agent, which is a common sizing agent. Melamine resin is dissolved and bleaching effect is given.

또 차아염소산소다는 물에 용해되는 과정에서 발열반응을 일으키므로 투입량에 따라 차이는 있겠지만 5-15중량%부를 배합하므로서 약 30-60℃ 정도로 유지할 수 있다.In addition, since sodium hypochlorite generates an exothermic reaction in the process of dissolving in water, it can be maintained at about 30-60 ℃ by blending 5-15% by weight, depending on the input amount.

이와 같은 온도에서는 종이양면에 피막된 폴리에틸렌등의 필름이 연화점 또는 그보다 높은 온도에서 열변형을 받고 있는 상태이므로 내부섬유펄프의 팽윤장애를 적게해주므로서 해서를 촉진시킬 수 있는 잇점이 있으며 필름표면에 인쇄된 잉크가 용해되지 않아 필름분리지 필름에 부착된 상태가 제거된다.At this temperature, the film such as polyethylene coated on both sides of the paper is in a state of thermal deformation at a softening point or higher temperature, thereby reducing the swelling disturbance of the internal fiber pulp, thereby facilitating the sea damage. The printed ink does not dissolve and the state of adhesion to the film separator film is removed.

특히 본 발명에서는 합성수지로 피막처리된 폐지를 재생하는 방법이므로 종래의 폐지재생방법과는 달리 탈묵제를 사용하지 않는 것이 유리하며 탈묵제를 사용하는 경우에는 오히려 회수되는 펄프에 착색되는 경향이 있고 온도가 60℃ 이상으로 점차 상승됨에 따라 인쇄된 잉크가 용해되어 팔프에 첨착되어 착색되는 경향이 있으며 더욱 상승되어 100℃ 부근에 도달하면 합성수지(폴리에틸렌)용융제가 펄프와 혼합되어 펄프와 필름분리가 곤란하며 분리한다하더라도 펄프의 손실이 크므로 처리액의 온도는 약 60℃ 정도로 유지됨이 가장 좋고 그 이하 30℃ 까지는 큰 문제점이 없다.In particular, in the present invention, since it is a method of reclaiming waste paper coated with synthetic resin, it is advantageous not to use a degreaser unlike a conventional waste paper regeneration method. Is gradually elevated above 60 ℃, the printed ink dissolves and adheres to the pals, which tends to be colored.When the temperature rises to around 100 ℃, the synthetic resin (polyethylene) melt is mixed with the pulp, making it difficult to separate the pulp from the film. Even if it is separated, the loss of pulp is large, so the temperature of the treatment liquid is best maintained at about 60 ° C and less than 30 ° C.

그밖에도 기계적인 처리는 목재에서 펄프제조시 팔파회전속도의 1.5-2배 정도로 고속으로 회전하므로서 시간단축과 높은 펄프수율을 기대할수 있다.In addition, the mechanical treatment can be expected to shorten the time and high pulp yield by rotating at a high speed of 1.5-2 times the wave speed when producing pulp from wood.

이상과 같이 본 발명에 의한 방법으로 처리하여 얻은 펄프는 인쇄된 잉크에 의하여 오염되지 않고 펄프에 손실이나 손상이 없는 펄프를 얻을 수 있는바 실제 본 발명에 의한 구체적인 실시예를 들어 비교실시예와 비교하므로서 본 발명에 의한 효과가 더욱 명백해짐을 알 수 있다.As described above, the pulp obtained by treatment by the method according to the present invention can obtain pulp that is not contaminated by the printed ink and has no loss or damage to the pulp. Therefore, it can be seen that the effect of the present invention becomes more apparent.

[실시예 1]Example 1

차아염소산소다 20㎏, 가성소다 1㎏ 미량의 침투제를 5톤의 물에 용해시키고 200㎏의 폴리에틸렌 피막폐지를 투입하여 고해하여 해서한다음 여과하여 약액을 회수하고 고형분을 수세한 다음 적당량 펄프농도의 용액상태로 스크린을 통과시켜 절건량 158㎏의 펄프와 31㎏의 폴리에틸렌 피막스크랩을 얻었다.20 kg of sodium hypochlorite and 1 kg of caustic soda are dissolved in 5 tons of water, and 200 kg of polyethylene film is thrown away for beating. The solution is filtered, washed with solids and washed with an appropriate amount of pulp. The screen was passed through the solution to obtain 158 kg of dried pulp and 31 kg of polyethylene film scrap.

[비교실시예 (1)]Comparative Example (1)

실시예 (1)과 동일한 재질의 폐지를 종래의 용융분리방법으로 폐지 200㎏을 물 5톤에 투입하여 고압으로 온도를 상승시켜 약 220℃ 유지시켜 고해증자하여 수지층과 펄프를 분리한 결과 펄프 134㎏과 펄프가 혼입된 수지용융제 56㎏을 얻었다.Waste paper made of the same material as in Example (1) was put into 5 tons of waste paper by the conventional melt separation method, and the temperature was increased to a high pressure by maintaining the temperature at a high pressure of about 220 ° C. 56 kg of the resin melt which mixed 134 kg and pulp was obtained.

[비교실시예 (2)]Comparative Example (2)

실시예(1)과 동일한 방법으로 처리하되 온도를 약 80℃ 상승시켜 처리한 결과 절건량 142㎏의 펄프와 48㎏의 피막스크랩을 얻었으며 펄프색상이 인쇄잉크로 오염되어 있었다. 이상의 실시예에 나타난 바와 같이 실시예(1)은 본 발명에 의한 방법으로 비교실시예(1)(2)와 비교할때 펄프수율이 높고 펄프의 색상에 있어서도 본래의 지류색상을 유지할수 있었다.The treatment was carried out in the same manner as in Example (1), but the treatment was performed by raising the temperature to about 80 ° C. to obtain 142 kg of dried pulp and 48 kg of film scrap, and the pulp color was contaminated with the printing ink. As shown in the above examples, Example (1) was a method according to the present invention, compared with Comparative Example (1) and (2), the pulp yield was high and the original paper color could be maintained even in the color of the pulp.

Claims (1)

중량비로 차아염소산소다 5-15부, 가성소다 0.5-1.5부 및 미량의 침투제를 첨가한 수용액에 100부의 합성수지 피막폐지를 투입하여 온도를 30°-60℃로 유지시키면서 고속팔파를 고해하여 해서한 다음 스크린을 통과시켜 합성수지피막의 제거 및 펄프를 회수하는 합성수지피막폐지의 재생방법.100 parts of synthetic resin film was added to an aqueous solution containing 5-15 parts of sodium hypochlorite, 0.5-1.5 parts of caustic soda, and a small amount of penetrant by weight, and then beaten at a temperature of 30 ° -60 ° C. A method of reclaiming synthetic resin film waste paper which removes the synthetic resin film and recovers pulp by passing through a next screen.
KR1019850003570A 1985-05-23 1985-05-23 Reproduction method of plastic-coated paper KR870002128B1 (en)

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Application Number Priority Date Filing Date Title
KR1019850003570A KR870002128B1 (en) 1985-05-23 1985-05-23 Reproduction method of plastic-coated paper

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Application Number Priority Date Filing Date Title
KR1019850003570A KR870002128B1 (en) 1985-05-23 1985-05-23 Reproduction method of plastic-coated paper

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KR860009189A KR860009189A (en) 1986-12-20
KR870002128B1 true KR870002128B1 (en) 1987-12-09

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