KR100254531B1 - Process for preparing flame retardant paper - Google Patents

Process for preparing flame retardant paper Download PDF

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Publication number
KR100254531B1
KR100254531B1 KR1019960044722A KR19960044722A KR100254531B1 KR 100254531 B1 KR100254531 B1 KR 100254531B1 KR 1019960044722 A KR1019960044722 A KR 1019960044722A KR 19960044722 A KR19960044722 A KR 19960044722A KR 100254531 B1 KR100254531 B1 KR 100254531B1
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South Korea
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paper
flame retardant
sheet
flame
drying
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KR1019960044722A
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Korean (ko)
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KR970001739A (en
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최은수
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윤세호
남한제지주식회사
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/34—Ignifugeants
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • D21H19/12—Coatings without pigments applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/64—Inorganic compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/84—Paper comprising more than one coating on both sides of the substrate

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)

Abstract

PURPOSE: A process for preparing flame-retardant paper by forming a sheet and coating a flame retardant composition such as ammonium compounds on the surface of the sheet in a size press is provided, which generates reduced water pollution and produces paper having excellent fire retardancy. CONSTITUTION: This process is characterized in that it comprises the steps of: forming a sheet by passing a paper liquid obtained by treating pulp, epoxy resin, cationic starch, a neutral sizing agent and a filler through a metal net part; drying the hydrated sheet under pressure in the first stage; coating 10 to 15% by weight of a flame retardant composition consisting of an ammonium compound containing 32% urea and ammonium salts based on the solid part of the paper making material on both sides of the sheet; and drying.

Description

난연지의 제조방법Manufacturing method of flame retardant paper

도면은 난연지의 제조 공정 개략도.The figure shows the manufacturing process schematic of a flame-resistant paper.

〈도면의 주요부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>

1 : 펄퍼 2 : 저장조1: pulp 2: reservoir

3 : 고해기 4 : 혼합저장조3: confessional 4: mixed storage tank

5 : 머신체스트 6 : 크리너5: machine chest 6: cleaner

7 : 스크린 8 : 헤드박스7: Screen 8: Headbox

9 : 금망부 10 : 프레스파트9: gold mesh portion 10: press part

11 : 선건조부 12 : 사이즈프레스11: pre-drying unit 12: size press

13 : 후건조부 14 : 광택부13: after drying unit 14: glossy unit

15 : 권취부 16 : 재권취부15: winding section 16: rewinding

본 발명은 난연지의 제조방법에 관한 것으로 구체적으로는 암모늄 화합물들의 난연제 조성물로 지필 성형후 사이즈 프레스에서 지필표면에 도공(coating)하는 방식으로 난연지를 제조하는 방법을 제공함에 있다.The present invention relates to a method of manufacturing a flame retardant paper, and more particularly, to a method of manufacturing a flame retardant paper by coating on a paper surface in a size press after paper-molding with a flame-retardant composition of ammonium compounds.

종래의 난연지 제조방법은 난연성 약품을 종이의 주원료인 펄프 슬러리에 투입하므로서 초지기에서 탈수가 되면서 펄프, 사이즈제, 전료등과 함께 유실되어 고가의 약품손실 뿐만 아니라 난연성이 좋지 않고 용해된 난연제의 배출로 인한 공해 유발등의 문제점을 갖고 있다.The conventional method of manufacturing a flame retardant paper is to put a flame retardant into a pulp slurry, which is the main material of paper, and then, as it is dehydrated in a paper machine, it is lost together with pulp, a sizing agent, a filler, and the like. There is a problem such as causing pollution.

근간 제지공업에 있어서, 원가절감의 차원에서나 공해방지의 측면에서 초지후의 폐액이나 탈수폐액으로부터 펄프, 사이즈제와 함께 진료의 순환 사용이나 회수등을 위하여 다양한 방법들이 강구되고 있다.In the papermaking industry, various methods have been devised for the recycling and use of medical treatment with pulp and sizing agents from waste paper or dewatering waste paper after papermaking in terms of cost reduction and pollution prevention.

본 발명은 난연성이 우수한 난연지를 제조함에 있어 공정 및 난연제의 선택이나 변경으로 공해 발생요인을 감소시킴과 동시에 초지폐액 또는 탈수폐액으로부터 유실되는 제지원료등을 용이하게 회수할 수 있는 방법등이 고려된 난연지의 제조방법이라 할 수 있으며, 우선 본 발명에 의한 난연지의 제조방법에 관한 이해를 돕기 위해 전체적인 제지 공정도를 설명하면 도면에서와 같이 주원료인 펌프를 펄퍼(1)에서 물에 각각 풀어 저장조(2)에서 일시 저장한 다음 고해기(3)에서 펄프섬유에 초지성을 부여하기 위하여 물속에 해리된 섬유를 기계적으로 절단 및 기모화(Fibrillation)한 후 혼합저장조(4)로 이송 이곳에서 각각의 펄프와 재생원료(Broke)에 정착제를 투입 혼합한다.In the present invention, in the manufacture of flame retardant paper having excellent flame retardancy, the method of reducing pollution caused by the selection or modification of the process and the flame retardant, and at the same time, a method for easily recovering the support fee lost from paper waste or dehydrated liquid, etc. are considered. It can be referred to as a method of manufacturing a flame-retardant paper, first, in order to help understand the method of manufacturing a flame-retardant paper according to the present invention, when explaining the overall paper making process diagram, as shown in the figure, each pump is released from the pulp (1) to the water storage tank After temporary storage in (2), mechanically cut and fibrillate the dissociated fibers in water to give papermaking properties to the pulp fibers in the crusher (3), and then transfer them to the mixed storage tank (4). The fixer is added and mixed with the pulp and recycled raw material.

이어 머신체스트(5)에서 지력강도를 향상시키는 양성전분을 투입하고 이 원료에 중성사이즈제인 알킬케덴다이머를 투여하면서, 백수와 혼합하여 농도를 4.5%에서 1.0%로 묽게 한다음 크리너(6)와 밀폐형 스크린(7)에서 원료이외의 불순물을 제거하고 초지기의 헤드박스(8)로 공급한다.In the machine chest (5), the cationic starch to improve the strength of intellect was added, and an alkyl keden dimer, a neutral sizing agent, was added to the raw material, mixed with white water to dilute the concentration from 4.5% to 1.0%, and then the cleaner (6) and In the sealed screen 7, impurities other than raw materials are removed and supplied to the head box 8 of the paper machine.

이와같이 헤드박스(8)에 유입된 지료는 연속적으로 주행하는 금망부(9)로 분출되어 탈수가 진행되면서 지필(sheet)을 형성한 후 프레스파트(10)로 이송되어 착수가 진행되고, 이어 선건조부(11)의 회전하는 드라이어 실린더에 접촉되어 표면열기에 의하여 지필의 수분을 증발시킨 다음 사이즈프레스(size press)에서 난연제 조성물을 코팅하여 난연성을 부여하고 후건조부(13)에서 최종적으로 건조시킨다.In this way, the paper flowed into the head box 8 is ejected to the gold mesh portion 9 that runs continuously, dehydration proceeds to form a sheet, and then transferred to the press part 10 to be undertaken. After contacting the rotating dryer cylinder of the drying unit 11 to evaporate the moisture of the paper by the surface heat, the flame retardant composition is coated in a size press (size press) to impart flame retardancy and finally dried in the after-drying unit (13) Let's do it.

건조가 완료된 지필은 광택부(14)에서 표면을 평활하게 한다음 권취부(15)에서 롤상태로 감겨지고 최종적으로 원하는 규격으로 재권취부(16)에서 여러 토막으로 나누어 감고 포장하므로서 제품이 완료된다.After the drying is completed, the paper is smoothed on the surface of the gloss portion 14 and then wound in a roll state on the winding portion 15, and finally, the product is completed by dividing and packing the pieces into several pieces in the rewinding portion 16 to a desired standard. .

위의 공정에서 ①-⑧까지의 투입되는 원료는 펄퍼(1)에서 활엽수 표백화 펄프 및 침엽수 표백화 펄프(Sw BKP)를 물에 풀어 저장조(2) 및 고해기(3)를 거쳐 혼합저장조(4)에서 정착제인 에폭시수지를 첨가 충분히 교반한 용액에 머신체스트(5)에서 양성 전분을 첨가하여 얻어진 백수에 중성 사이즈제와 전료를 첨가하여 스크린(6)을 통과시키면서 불순물을 제거하므로서 초지원료가 완성되며 완성된 초지원료의 배합량은 다음과 같다.In the above process, the raw materials to be input to ①-⑧ are mixed with the storage tank (2) and the beaker (3) by dissolving the hardwood bleaching pulp and conifer bleaching pulp (Sw BKP) in water from the pulper (1). The epoxy resin as a fixing agent was added to 4) to the white stout obtained by adding the positive starch in the machine chest (5) to the sufficiently stirred solution. The formulated amount of the finished subsidiary fee is as follows.

초지원료 배합량Super support fee amount

1) 활엽수 표백화학 펄프(HwBKP) 69%1) Hardwood Bleaching Chemical Pulp (HwBKP) 69%

2) 침엽수 표백화학 펌프(SwBKP) 7.7%2) Conifer bleaching chemical pump (SwBKP) 7.7%

3) 중성 Size제(성분 : Alkyl Keten Dimer) 0.16%3) Neutral Size Agent (Component: Alkyl Keten Dimer) 0.16%

4) 정착제(성분: Epoxy 수지) 0.34%4) Fixing Agent (Component: Epoxy Resin) 0.34%

5) 충전제(성분: Talc, CaCO3) 22.1%5) Filler (component: Talc, CaCO 3 ) 22.1%

6) 양성전분(성분: Potato) 0.7%6) Cationic Starch (Component: Potato) 0.7%

또 헤드박스(8)에 유입된 지료는 주행하는 금망부(9)로 분출되어 탈수가 진행되면서 지필을 형성한 후 푸레스파트(10)에 이송되어 착수를 한 지필을 선건조부(11)의 회전드라이어 실린더에서 접촉되어 1차 건조를 시킨다음 싸이즈프레스(Size press)에서 난연제 조성물을 코팅하여 후건조부(13)를 거치고 광택부(14)에서 표면을 평활하게 한다음 권취부(16)에 감게 되므로서 난연지가 완성되며 여기에서 사이즈프레스(12)에서 코팅되는 난연제 조성물은 다음과 같다.In addition, the paper flowed into the head box 8 is ejected to the running gold mesh 9 to form a paper with dehydration proceeds, and then transferred to the pressing part 10, the paper-based pre-drying unit 11 is started to dry. After contacting in the rotary dryer cylinder of the first drying and then coating the flame retardant composition in the size press (Size press) to pass through the after-drying portion 13 and smooth the surface in the glossy portion 14 and then the winding portion 16 The flame-retardant paper is completed as it is wound on and the flame retardant composition coated on the size press 12 is as follows.

난연제 조성물Flame retardant composition

1) 브롬암모늄(NH4Br) 42%1) Bromine Ammonium (NH 4 Br) 42%

2) 2인산암모늄(NH4)2HPO 16%2) Ammonium Diphosphate (NH 4 ) 2 HPO 16%

3) 황산암모늄(NH4)2SO410%3) Ammonium Sulfate (NH 4 ) 2 SO 4 10%

4) 요소(NH2)2CO 32%4) Urea (NH 2 ) 2 CO 32%

==================================================================

100%100%

고형분 (23.7)%Solids (23.7)%

이상에서 본 발명에 의한 난연지 제조방법의 특징은, 첫째, 난연제 조성물 전부가 물에 잘 용해되는 암모늄 화합물 또는 암모늄 염의 조성물이고, 둘째, 종래 난연지 제조방법에 있어서 펄프 슬러리에 난연제를 투입하여 사이즈 방법으로 난연성의 난연지를 얻는 대신에 사이즈프레스에서 난연제를 코팅하는 방법을 선택한 점과 선건조부(11)에서 1차 건조한 사이즈프레스에서 난연제를 코팅하는 수단, 그리고 난연제 조성물들의 특징을 들수 있다.The characteristics of the flame retardant paper manufacturing method according to the present invention is first, the composition of the ammonium compound or ammonium salt in which all of the flame retardant composition is well dissolved in water, and second, the size of the conventional flame retardant paper by adding a flame retardant to the pulp slurry Instead of obtaining flame retardant paper as a method, the method of coating the flame retardant in the size press, the means of coating the flame retardant in the first dry size press in the pre-drying unit 11, and the characteristics of the flame retardant compositions.

상기 난연제 조성물들 중 브롬암모늄은 무색의 결정, 또는 노란색을 띠는 백색분말로서 물알콜등에 잘 용해되며 방염성이 뛰어나며 부식 방지기능을 갖고 있는 물질이다.In the flame retardant compositions, bromine ammonium is a colorless crystal or yellowish white powder, which is well soluble in water alcohol, etc., and is excellent in flame retardancy and corrosion protection.

또 2인산암모늄은 백색결정 또 분말로서 물에 잘 용해되며 비연소성이면서 방염성이 뛰어나고 독성이 거의 없는 물질이며, 황산암모늄은 브라운 색을 띠는 회색에서 백색에 이르는 결정으로서 물에 잘 용해되며 비연소성이면서 방화조성물로 사용되는 물질로서 독성이 낮은 물질이고 잘알려진 요소 역시 백색의 결정 또는 분말로서 독성이 거의 없고 비연소성이면서 물에 용해되어 접착성을 가져 전체 조성물을 지필 표면에 강력하게 접착시키고 특히 사이즈 공정에서 정착제로 투입된 에폭시수지와 상용성이 좋아 더욱 접착력을 강화시킨다.Ammonium diphosphate is a white crystal or powder that dissolves well in water and is non-flammable, flame retardant, and almost nontoxic. Ammonium sulfate is a brownish gray to white crystal that dissolves well in water and is non-combustible. In addition, it is a material used as a fire prevention composition, and is a low toxicity material. The well-known urea is also a white crystal or powder, which is almost non-toxic, non-combustible, dissolves in water, has adhesiveness, and strongly adheres the entire composition to the surface of paper. Good compatibility with epoxy resin added as a fixing agent in the process enhances the adhesion.

펄프 슬러리에 투입된 양성 전분의 점도를 변성 및 조절하여 초지예 적합하도록 하는 기능도 갖고 있다.It also has the function of modifying and adjusting the viscosity of the amphoteric starch added to the pulp slurry to make it suitable for papermaking.

또 하나의 특징은 상기 펄프 슬러리에 투입하지 않고 선건조부(11)에서 1차 건조후 사이즈프레스에서 도공(Coating) 작업을 선택함에 있다 하겠다.Another feature is to select the coating (Coating) operation in the size press after the first drying in the pre-drying unit 11 without putting into the pulp slurry.

그 이유로 난연성이 우수한 암모니움염의 조성물을 펄프슬러리에 투입할 경우 물에 용해되어 초지후나 탈수폐액으로 물과 함께 유실되는 것도 큰 문제이지만 상기 암모니움염은 분산성이 크므로 사이즈제나 전료등을 포집하는 경우에 응집등이 어렵고 별도의 약품등을 첨가해야 하는 문제점이 발생하게 되므로 본 방법에서와 같이 사이즈프레스에서 도공작업을 하게되는 경우 위와같은 문제점이 완전히 해소된다.For this reason, when a composition of ammonium salt having excellent flame retardancy is added to the pulp slurry, it is also a big problem to be dissolved in water and lost with water in papermaking or dehydration fluid, but since the ammonium salt is highly dispersible, it collects a sizing agent or a filler. In this case, it is difficult to agglomerate, and the problem of adding a separate drug is generated, so that the above problems are completely solved when the coating work is performed in the size press as in the present method.

그리고 선건조부(11)에서 1차 건조후 사이즈프레스에서 도공(Coating)하게 되므로 정착제인 에폭시수지가 완전경화된 상태가 아니라 요소와의 접착력이 좋고 양성전분 역시 완전히 건조된 상태가 아니므로 요소에 의한 점도 변성 또는 조절로 난연제 조성물의 접착력을 향상시키나 완전건조후 난연제 조성물을 도공하면 접착력이 저하됨을 알 수 있다.In addition, since coating is carried out in the size press after the first drying in the pre-drying unit 11, the epoxy resin as the fixing agent is not completely cured but has good adhesion with the urea and the positive starch is not completely dried. It can be seen that the adhesive force of the flame retardant composition is improved by modifying or adjusting the viscosity, but when the flame retardant composition is coated after complete drying, the adhesive force is lowered.

또 배합된 전체 초지원료 고형분에 대하여 난연제 조성물의 고형분으로서의 첨가량은 10%-15% 중량부로서 10%이하일 경우에는 난연성이 급격히 떨어지고 15%이상일 경우에는 종이의 유연성, 인쇄성, 굴곡성등이 좋지 않고 종이의 무게가 무거워지며 소각시 회분량이 많아진다.In addition, the total amount of the flame retardant composition added as a solid content of the total super-support material solid content is 10% -15% by weight, if less than 10%, the flame retardancy is sharply reduced, and if more than 15%, the flexibility, printability, flexibility of the paper is not good Paper becomes heavier in weight and more ash when incinerated.

그밖에 난연제 조성물중 요소수지의 조성비는 나머지 조성물을 지필 표면에 우수한 상태로 접착시킬 수 있는 양이고 황산암모늄은 난연성은 우수하나 많은 량을 사용할 경우 종이의 색이 황색을 띠게 되므로 이와같은 색상이 나타나지 않는 한계량이라 할 수 있으며 브롬암모늄과 2인산암모늄은 난연성의 상승효과를 최대한으로 나타낼 수 있는 적정량이라 할수 있고 이와같은 조성비는 수개월간의 실험을 거쳐 구성된 조성비라 할 수 있다.In addition, the composition ratio of urea resin in the flame retardant composition is an amount that can adhere the remaining composition to the paper surface in an excellent state, and ammonium sulfate has excellent flame retardancy, but when a large amount is used, the color of the paper becomes yellow so that such color does not appear. It can be said that the limit amount, bromine ammonium and ammonium diphosphate are the appropriate amount to show the synergistic effect of flame retardancy to the maximum, and such a composition ratio can be said to be a composition ratio that has been experimented for several months.

이상의 방법으로 얻어진 난연지의 난연도를 비교할 경우 종래의 난연지에 붙일 경우 불꽃이 옮겨 붙은 상태에서 5초-7초 사이에서 꺼지지만 본 발명에 의한 난연지는 불을 붙일 경우 불꽃이 전혀 옮겨붙지 않을 정도로 난연성이 우수하다.When comparing the flame retardancy of the flame retardant paper obtained by the above method, when attached to a conventional flame retardant paper, the flame is turned off between 5 seconds and 7 seconds while the flame is transferred, but the flame retardant paper according to the present invention is such that the flame does not transfer at all when it is lit. Excellent flame retardancy

이상에서와 같이 본 발명에 의한 난연지의 제조방법을 더욱 명확하게 하고 난연지의 물성을 알아보기 위해 아래와 같이 실시예를 나타내었다.As described above, in order to clarify the manufacturing method of the flame retardant paper according to the present invention and to find out the physical properties of the flame retardant paper was shown as follows.

[실시예 1]Example 1

활엽수 펌프 690kg과 침엽수펄프 77kg을 펄퍼에서 물에 풀어 슬러리화 한다음 고해기에서 절단 및 기모화한 슬러리액을 혼합 유입시켜 여기에 정착제인 에폭시수지 3.4kg을 투입 용해시키고 이 액을 머신체스트에 유입하여 양성전분 7kg을 투입 분산시키고 이어 사이로에서 중성사이즈제인 알킬케텐다이머 1.6kg과 충전제 221kg을 투입하여 용해 또는 분산한 다음 스크린을 거쳐 헤드박스에 투입시킨다.690kg of hardwood pump and 77kg of coniferous pulp are slurried by pulping with water, and then mixed and flown into the slurry liquid cut and raised in the blast furnace. 3.4kg of epoxy resin as a fixing agent is added and dissolved, and this liquid is introduced into the machine chest. Then, 7 kg of cationic starch was added and dispersed, followed by dissolving or dispersing 1.6 kg of an alkyl ketene dimer and 221 kg of a neutral sizing agent, and then dispersing it into a head box through a screen.

이 초지액을 금망부로 통과시켜 지필을 얻고 압착 탈수하여 선거조부에서 1차 건조시킨 지필에 중량비로 부롬암모늄 42%, 2인산암모늄 16%, 황산암모늄 10%, 요소 32%의 조성비로된 난연제 수용액 100kg(고형분 24kg)으로 도공하여 후건조부에서 완전 건조시켜 광택을 부여한 롤상태의 난연지를 얻었다.This paper was passed through a gold mesh to obtain paper, and it was compressed and dehydrated. The paper was dried first in an electoral grandfather, and the weight ratio of flame retardant was 42% of bromine ammonium, 16% of ammonium diphosphate, 10% of ammonium sulfate, and 32% of urea. Coating with an aqueous solution of 100 kg (solid content 24 kg) and completely dried in a post-drying part to obtain a roll-shaped flame-retardant paper with a gloss.

이 난연지를 물성검사를 행한 결과 표(1)과 같은 실험수치를 얻었다.The physical properties of this flame retardant paper were tested, and the experimental values as shown in Table (1) were obtained.

Claims (1)

펄프, 정착제로서 에폭시수지, 양성전분, 중성사이즈제, 충전제의 제지원료로 통상의 처리방법으로 얻어진 초지액을 금망부에 통과시켜 지필을 형성하고 프레스에서 압착 탈수한 지필을 선건조부에서 1차 건조시킨 후 사이즈 프레스에서 지필의 양면에 요소 32%를 포함하는 암모니움 화합물 또는 암모니움 염으로 조성된 난연제 조성물을 중량비로 상기 제지원료 고형분에 대하여 10-15%를 도공한 후 완전건조 시킴을 특징으로 하는 난연지의 제조방법.Pulp and fixer as epoxy resin, amphoteric starch, neutral sizing agent, filler, etc. After drying, the flame retardant composition composed of ammonium compound or ammonium salt containing 32% of urea on both sides of the paper in a size press was coated in a weight ratio of 10-15% of the refining material solid, followed by complete drying. Method for producing a flame retardant paper characterized in that.
KR1019960044722A 1996-10-09 1996-10-09 Process for preparing flame retardant paper KR100254531B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023054869A1 (en) * 2021-09-28 2023-04-06 주식회사 케이씨씨 Gypsum board with improved non-combustibility
KR102679400B1 (en) 2023-06-26 2024-07-01 주식회사 제이피에너지 Flame retardant paper for preventing thermal runaway and reinforcing incombustibility containing nanocluster type composite oxide and manufacturing method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023054869A1 (en) * 2021-09-28 2023-04-06 주식회사 케이씨씨 Gypsum board with improved non-combustibility
KR102679400B1 (en) 2023-06-26 2024-07-01 주식회사 제이피에너지 Flame retardant paper for preventing thermal runaway and reinforcing incombustibility containing nanocluster type composite oxide and manufacturing method thereof

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