JP5938837B2 - Bleached wood flour, method for producing bleached wood flour, paper using the same and papermaking method thereof - Google Patents
Bleached wood flour, method for producing bleached wood flour, paper using the same and papermaking method thereof Download PDFInfo
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- JP5938837B2 JP5938837B2 JP2013537619A JP2013537619A JP5938837B2 JP 5938837 B2 JP5938837 B2 JP 5938837B2 JP 2013537619 A JP2013537619 A JP 2013537619A JP 2013537619 A JP2013537619 A JP 2013537619A JP 5938837 B2 JP5938837 B2 JP 5938837B2
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- 239000002023 wood Substances 0.000 title claims description 110
- 235000013312 flour Nutrition 0.000 title claims description 33
- 238000000034 method Methods 0.000 title claims description 32
- 238000004519 manufacturing process Methods 0.000 title claims description 19
- 239000000843 powder Substances 0.000 claims description 68
- 238000004061 bleaching Methods 0.000 claims description 31
- 229920001131 Pulp (paper) Polymers 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 15
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 239000007844 bleaching agent Substances 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 3
- 238000002156 mixing Methods 0.000 description 10
- 239000012267 brine Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010298 pulverizing process Methods 0.000 description 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 240000000111 Saccharum officinarum Species 0.000 description 1
- 235000007201 Saccharum officinarum Nutrition 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
Classifications
-
- 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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
- D21B1/063—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods using grinding devices
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
-
- 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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
- D21H11/20—Chemically or biochemically modified fibres
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Paper (AREA)
Description
本発明は、漂白木粉を天然パルプと混合して製紙を行うことにより、脱水性を向上させる一方で、パルプの使用量を低減して安価で且つ高品質の紙が得られる漂白木粉、漂白木粉の製造方法、それを用いた紙及びその製紙方法に関する。 The present invention is a bleached wood powder that improves the dehydration by mixing bleached wood powder with natural pulp to make paper, while reducing the amount of pulp used to obtain inexpensive and high-quality paper, The present invention relates to a method for producing bleached wood flour, a paper using the same, and a method for making the paper.
一般に、紙は、天然パルプから製造するか、あるいは、再生パルプを混合して製造する。なお、天然パルプとしては、木材、麻、カジノキ、稲藁、サトウキビ、パピルスなど種々の材料が挙げられる。 In general, paper is manufactured from natural pulp or by mixing recycled pulp. Examples of natural pulp include various materials such as wood, hemp, casinowood, rice straw, sugar cane, and papyrus.
一般に、紙は、原料使用の効率化と抄紙工程の脱水性を図るために、多数の層の紙が合紙された形状に製造され、製紙に用いられる原料は、天然パルプと再生パルプとに大別できる。 In general, paper is manufactured in a shape in which many layers of paper are interleaved in order to improve the efficiency of raw material use and dewaterability in the papermaking process. The raw materials used for papermaking are natural pulp and recycled pulp. Can be divided roughly.
前記再生パルプは、天然パルプに比べて微細粉と灰分の含量が高いため脱水性を低下させるだけではなく、紙のバルク性と強度を減少させ、とりわけ、バルク性の減少は製紙工程におけるパルプの使用量を増大させて生産コストに悪影響を与えてしまう。なお、再生パルプの場合に、再使用回数が増大されるにつれて含水能が高くなって乾燥エネルギーが上昇する。 The recycled pulp not only lowers the dewaterability due to its high fine powder and ash content compared to natural pulp, but also reduces the bulk and strength of the paper. Increasing the amount used will adversely affect production costs. In the case of recycled pulp, the water content becomes higher and the drying energy increases as the number of reuses increases.
したがって、紙のバルク性を上昇させると、再生パルプの使用量が低減されるだけではなく、乾燥エネルギーの節減にも役立つので、従来には、紙のバルク性を向上させる木粉を再生パルプと混合して製紙を行うことにより、紙のバルク性を向上させてパルプの使用量を低減している（例えば、下記の特許文献１参照）。参考までに、前記特許文献１は、２００９年０５月１２日付けで大韓民国特許庁に登録されており、出願人はハンソル製紙株式会社である。 Therefore, increasing the bulk property of paper not only reduces the amount of recycled pulp used, but also helps reduce drying energy. Conventionally, wood flour that improves the bulk property of paper is used as recycled pulp. By making paper by mixing, the bulk property of the paper is improved and the amount of pulp used is reduced (see, for example, Patent Document 1 below). For reference, Patent Document 1 is registered with the Korean Patent Office on May 12, 2009, and the applicant is Hansol Paper Co., Ltd.
しかしながら、上記の従来の技術に用いられる木粉は、木材を用意し、該木材をグラインダーで粉砕し且つ分級し、さらに選び抜いたものである。この木粉は、天然パルプではなく、再生パルプ（古紙）と混合されて製紙に供されるため、白紙に広範に使用できない他、再生パルプに比べて高価な天然パルプの使用量を低減することができず、これは、製紙コストの高騰化につながる。 However, the wood powder used in the above-mentioned conventional technology is prepared by preparing wood, grinding and classifying the wood with a grinder, and further selecting. This wood flour is not natural pulp, but is mixed with recycled pulp (waste paper) and used for papermaking, so it cannot be used extensively on white paper, and it reduces the amount of expensive natural pulp used compared to recycled pulp. This leads to an increase in papermaking costs.
本発明は、上記事情に鑑みてなされたものであり、その目的は、製紙に際してバルク性を向上させるために用いられる木粉を、再生パルプではなく、天然パルプと混合して用いることから、天然パルプの使用量を低減することができ、しかも、漂白木粉を用いることから白紙の製造にも活用することのできる漂白木粉、漂白木粉の製造方法、それを用いた紙及びその製紙方法を提供することである。 The present invention has been made in view of the above circumstances. The purpose of the present invention is to use wood flour used for improving bulk properties in papermaking by mixing with natural pulp instead of recycled pulp. Bleached wood powder that can reduce the amount of pulp used, and that can be used for white paper production because it uses bleached wood powder, a method for producing bleached wood powder, paper using the same, and a method for making the paper Is to provide.
上記の目的を達成するために、本発明の実施形態に係る漂白木粉の製造方法は、Ｓ１０：木材を粉砕機で粉砕してウッドパルプにした後、含水量１〜２重量％になるように乾燥するウッドパルプ乾燥過程と、Ｓ２０：前記ウッドパルプ乾燥過程において乾燥されたウッドパルプを繊維長０．１５ｍｍ以下の木粉に分級し且つ選り抜く木粉分級及び選抜過程と、Ｓ３０：前記木粉分級及び選抜過程において分級され且つ選び抜かれた木粉を漂白設備に送り込み、５分後にＨ２Ｏ２（過酸化水素）水溶液と塩水を混合して添加し、漂白剤をかけて４０分間攪拌しながら漂白する木粉漂白過程と、Ｓ４０：前記木粉漂白過程において漂白された木粉にスチームを供給して漂白木粉を乾燥する漂白木粉乾燥過程と、Ｓ５０：前記漂白木粉乾燥過程において乾燥された漂白木粉を分級し且つ選り抜く漂白木粉分級及び選抜過程と、を含むことを特徴とする。 In order to achieve the above object, the method for producing bleached wood powder according to the embodiment of the present invention is: S10: After pulverizing wood with a pulverizer into wood pulp, the water content is 1 to 2% by weight. S20: Wood pulp drying process, S20: Wood pulp dried in the wood pulp drying process is classified into wood flour having a fiber length of 0.15 mm or less and selected, and S30: The wood Wood powder classified and selected in the powder classification and selection process is sent to a bleaching facility, and after 5 minutes, a H 2 O 2 (hydrogen peroxide) aqueous solution and brine are mixed and added, and then the mixture is bleached and stirred for 40 minutes. Bleaching wood powder bleaching process, S40: bleaching wood powder drying process for supplying steam to the wood powder bleached in the wood powder bleaching process and drying the bleached wood powder, S50: bleaching wood powder drying process In Classification and selection process of classifying and selecting bleached wood powder dried in the process, and characterized in that.
また、本発明の実施形態に係る漂白木粉を用いた製紙方法は、製造された漂白木粉５〜２０重量％と、天然パルプ８０〜９５重量％とを混合して抄紙機に送り込んで製紙を行うことを特徴とする。 In the papermaking method using the bleached wood powder according to the embodiment of the present invention, the manufactured bleached wood powder 5 to 20% by weight and the natural pulp 80 to 95% by weight are mixed and fed to a paper machine. It is characterized by performing.
本発明は、再生パルプと天然パルプとを混合して製紙を行う際に、木粉を用意して漂白を行った後に、天然パルプと漂白木粉とを混合して製紙を行うことにより、脱水性を向上させて省エネルギーを図ることができ、漂白木粉を天然パルプに混入して用いることにより、天然パルプの使用量を画期的に低減することができ、しかも、白紙の製紙に広範に用いることができるという効果がある。 In the present invention, when paper is made by mixing recycled pulp and natural pulp, wood powder is prepared and bleached, and then natural pulp and bleached wood powder are mixed to make paper, thereby dehydrating. Energy consumption can be improved, and bleached wood flour mixed with natural pulp can dramatically reduce the amount of natural pulp used, and can be widely applied to blank papermaking. There is an effect that it can be used.
また、本発明の実施形態に係る紙及びその製紙方法によれば、木材を粉砕し且つ乾燥した後に、所定の大きさ以下に分級して選び抜き、選び抜かれた木粉を漂白設備に漂白剤とともに送り込んで所定時間攪拌しながら漂白を行い、漂白された木粉を研磨し、分級し且つ選び抜くことにより製造された漂白木粉５〜２０重量％を天然パルプ８０〜９５重量％と混合して製紙を行うので、白紙の製紙に広範に用いることができ、しかも、バルク性を向上させて天然パルプの使用量を低減することができる。 Further, according to the paper and the paper manufacturing method thereof according to the embodiment of the present invention, after pulverizing and drying the wood, it is classified and selected to a predetermined size or less, and the selected wood powder is bleached to the bleaching facility. Bleached wood powder is fed with stirring for a predetermined time, bleached wood flour is polished, classified and selected, and 5 to 20 wt% bleached wood flour is mixed with 80 to 95 wt% natural pulp. Therefore, it can be widely used for white paper making, and the bulk property can be improved and the amount of natural pulp used can be reduced.
以下、添付図面に基づき、本発明の好適な実施形態に係る漂白木粉、漂白木粉の製造方法、それを用いた紙及びその製紙方法について説明する。 Hereinafter, based on an accompanying drawing, bleaching wood powder concerning a suitable embodiment of the present invention, a manufacturing method of bleaching wood powder, paper using the same, and its papermaking method are explained.
（実施形態）
本発明は、製紙に際して、木粉を再生パルプと混合して用いる方式から逸脱して、木粉を漂白した後に天然パルプと混合して製紙を行うことにより、天然パルプの使用量を低減する一方で、バルク性を向上させて脱水性を増大させて省エネルギーを図っている。
(Embodiment)
The present invention deviates from the method of using wood powder mixed with recycled pulp during papermaking, and reduces the amount of natural pulp used by making paper by mixing with natural pulp after bleaching wood powder. Therefore, energy saving is achieved by improving the bulk property and increasing the dehydration property.
以下、本発明における木粉漂白過程と、漂白木粉を用いた製紙過程について説明する。 Hereinafter, the wood powder bleaching process and the paper making process using the bleached wood powder in the present invention will be described.
先ず、図２に基づき、本発明の実施形態に係る漂白木粉の製造方法について説明する。 First, based on FIG. 2, the manufacturing method of the bleaching wood powder which concerns on embodiment of this invention is demonstrated.
図２は、本発明の実施形態に係る漂白木粉の製造方法の流れを示すフローチャートである。 FIG. 2 is a flowchart showing a flow of a method for producing bleached wood flour according to an embodiment of the present invention.
先ず、木材を粉砕機で粉砕してウッドパルプにした後に、含水量１〜２重量％になるように乾燥する（ステップＳ１０）。 First, after pulverizing wood with a pulverizer to make wood pulp, it is dried so as to have a water content of 1 to 2% by weight (step S10).
次いで、乾燥されたウッドパルプを繊維長０．１５ｍｍ以下の木粉に選び抜き且つ分級する（ステップＳ２０）。 Next, the dried wood pulp is selected and classified into wood flour having a fiber length of 0.15 mm or less (step S20).
次いで、前記ステップＳ２０において分級され且つ選び抜かれた木粉を漂白設備に送り込み、５分後にＨ２Ｏ２（過酸化水素）水溶液と塩水を混合して添加し、漂白剤をかけて４０分間攪拌しながら漂白を行う（ステップＳ３０）。このとき、攪拌時間は、Ｈ２Ｏ２（過酸化水素）水溶液と塩水の量及び混合度に応じて調節する。なお、水を添加した後に概ね４０〜７０分で木粉に水分が十分に浸透され、本発明者による実験の結果、約５０分であれば、木粉に水分が十分に浸透されるということが判明された。 Next, the wood powder classified and selected in step S20 is sent to a bleaching facility, and after 5 minutes, a H 2 O 2 (hydrogen peroxide) aqueous solution and brine are mixed and added, and the mixture is stirred for 40 minutes with a bleaching agent. Then, bleaching is performed (step S30). At this time, the stirring time is adjusted according to the amount of H 2 O 2 (hydrogen peroxide) aqueous solution and salt water and the degree of mixing. In addition, after adding water, water | moisture content fully penetrates into wood flour in about 40 to 70 minutes, and as a result of an experiment by the present inventor, if about 50 minutes, water is sufficiently penetrated into wood flour. Was found.
このとき、木粉及び木粉を攪拌する攪拌機（図示せず）の内部温度は、６０〜８０℃に保たれる。 At this time, the internal temperature of the stirrer (not shown) that stirs the wood flour and wood flour is maintained at 60 to 80 ° C.
次いで、前記ステップＳ３０において漂白された木粉にスチームを供給して乾燥する（ステップＳ４０）。 Next, steam is supplied to the wood powder bleached in step S30 and dried (step S40).
次いで、前記ステップＳ４０において乾燥された漂白木粉を研磨し、分級し且つ選り抜く（ステップＳ５０）。 Next, the bleached wood powder dried in step S40 is polished, classified and selected (step S50).
上記の過程を経て本発明の実施形態に係る漂白木粉が製造される。 The bleached wood flour according to the embodiment of the present invention is manufactured through the above process.
一方、図１に基づき、本発明の実施形態に従い製造された上記の漂白木粉を用いて製紙を行う過程について説明する。 On the other hand, based on FIG. 1, the process of making paper using the bleached wood powder produced according to the embodiment of the present invention will be described.
図１は、本発明の実施形態に係る製紙方法の流れを示すフローチャートである。 FIG. 1 is a flowchart showing a flow of a papermaking method according to an embodiment of the present invention.
先ず、本発明の実施形態に従い製造された漂白木粉を分散して送り込み（図１における符号１０参照）、該漂白木粉５〜２０重量％と天然パルプ８０〜９５重量％とを混合して抄紙機に送り込んで通常の方法により製紙を行う。 First, bleached wood flour produced according to an embodiment of the present invention is dispersed and fed (see reference numeral 10 in FIG. 1), and the bleached wood flour is mixed with 5 to 20% by weight and natural pulp of 80 to 95% by weight. It is sent to a paper machine and paper is made by the usual method.
すなわち、本発明は、天然パルプだけで製紙を行うのではなく、天然パルプに所定量の漂白木粉を混入して製紙を行うことにより、漂白木粉のバルク性を向上させて天然パルプの使用量を低減させ、脱水性を向上させて製紙に要されるエネルギーを低減している。 That is, the present invention does not make paper using only natural pulp, but makes paper by mixing a predetermined amount of bleached wood powder into natural pulp, thereby improving the bulk property of bleached wood powder and using natural pulp. The amount of energy required for papermaking is reduced by reducing the amount and improving the dewaterability.
また、本発明は、木粉をそのまま用いる既存の方式とは異なり、木粉を漂白した後に用いるので、上記のメリットに加えて、白紙の製造に広範に利用することが可能になる。 Moreover, since the present invention is used after bleaching the wood powder, unlike the existing method using the wood powder as it is, in addition to the above merits, it can be widely used for the production of white paper.
以下、本発明の実施形態に係る漂白木粉の製造過程について詳述した後、前記漂白木粉を用いて製紙を行う方法について詳述する。 Hereinafter, after the manufacturing process of the bleaching wood powder according to the embodiment of the present invention is described in detail, a method of making paper using the bleaching wood powder will be described in detail.
本発明においては、製紙を行うために用いる木粉を製造するために、先ず、木材を用意し、用意された木材を粉砕機に送り込んでウッドパルプに粉砕し、得られたウッドパルプを含水量１〜２重量％になるように乾燥する。 In the present invention, in order to produce wood flour used for papermaking, first, wood is prepared, the prepared wood is sent to a pulverizer and pulverized into wood pulp, and the resulting wood pulp has a water content. Dry to 1 to 2% by weight.
すなわち、木材を粉砕してウッドパルプにした後に乾燥し、ウッドパルプの含水量が１〜２重量％になるように十分に乾燥する。 That is, the wood is pulverized into wood pulp and then dried, and sufficiently dried so that the water content of the wood pulp is 1 to 2% by weight.
前記粉砕され且つ乾燥されたウッドパルプは、繊維長０．１５ｍｍ以下になるように分級し且つ選び抜く。このとき、繊維長０．１５ｍｍ以下に揃えるために粉砕機を用いるが、分級中に上記の範囲を外れた木粉は再び粉砕機に送り込んで粉砕することにより、製紙に使用可能な繊維長にする。 The pulverized and dried wood pulp is classified and selected so that the fiber length is 0.15 mm or less. At this time, a pulverizer is used to adjust the fiber length to 0.15 mm or less, but the wood powder outside the above range during classification is sent to the pulverizer again and pulverized to obtain a fiber length usable for papermaking. To do.
このようにして木粉分級及び選抜過程において分級され且つ選び抜かれて繊維長０．１５ｍｍ以下に揃えられた木粉は、通常の漂白設備に所定量の水と共に送り込んだ後に、５分が経過するまで待って水分が木粉に十分に浸透されるようにする。ここで、木粉に水分を浸透させる理由は、漂白をスムーズに行うためである。 In this way, the wood powder classified and selected in the wood powder classification and selection process and adjusted to a fiber length of 0.15 mm or less passes 5 minutes after being sent to a normal bleaching facility together with a predetermined amount of water. Wait until the water is fully penetrated into the wood flour. Here, the reason why water is infiltrated into the wood powder is to perform bleaching smoothly.
次いで、木粉分級及び選抜過程においては、漂白設備に分級され且つ選び抜かれた木粉と共に水を送り込んだ後に５分が経過して水分が木粉に浸透すれば、Ｈ２Ｏ２（過酸化水素）水溶液と塩水を混合して漂白設備に添加する。次いで、上述したようにＨ２Ｏ２（過酸化水素）水溶液と塩水を混合して、水分の浸透された木粉が送り込まれている漂白設備に添加した後に、漂白剤をかけて約４０分間攪拌を行うことにより木粉の漂白を行う。 Next, in the wood powder classification and selection process, if water passes through the wood powder after 5 minutes have passed after the water is fed to the bleaching facility and the selected wood powder, H 2 O 2 (peroxide Hydrogen) Aqueous solution and brine are mixed and added to the bleach equipment. Next, as described above, an aqueous solution of H 2 O 2 (hydrogen peroxide) and salt water are mixed and added to the bleaching facility into which the moisture-impregnated wood flour is fed, and then the bleaching agent is applied for about 40 minutes. The wood powder is bleached by stirring.
このとき、木粉及び木粉を攪拌する攪拌機（図示せず）の内部温度は、６０〜８０℃に保たれ、これにより、均質な攪拌効果が得られる。 At this time, the internal temperature of the stirrer (not shown) that stirs the wood flour and the wood flour is kept at 60 to 80 ° C., thereby obtaining a homogeneous stirring effect.
上述したように漂白設備を用いて木粉を漂白した後には、漂白木粉を漂白設備からスチーム設備に移してスチームを用いて乾燥するが、このとき、乾燥速度は、木粉１トン当たり約１時間かけて乾燥を行う。 After bleaching the wood flour using the bleaching equipment as described above, the bleached wood flour is transferred from the bleaching equipment to the steam equipment and dried using steam. At this time, the drying speed is about per ton of wood flour. Dry for 1 hour.
上記の乾燥過程においてスチームにより乾燥された漂白木粉は、さらに研磨され、分級され且つ選び抜かれる。 The bleached wood powder dried by steam in the above drying process is further polished, classified and selected.
なお、このようにして漂白木粉が製造されると、これを用いて製紙を行う。 In addition, when bleached wood flour is manufactured in this way, paper manufacturing is performed using this.
製紙は、上記の過程を経て製造された漂白木粉５〜２０重量％と天然パルプ８０〜９５重量％とを混合した後に抄紙機に送り込むことにより行われ、抄紙機に送り込まれた漂白木粉と天然パルプとの混合材料を用いて製紙を行う過程は周知であるため、本発明においてはその詳細な記述を省略する。 The papermaking is performed by mixing 5 to 20% by weight of bleached wood powder produced through the above process and 80 to 95% by weight of natural pulp and then feeding it to the paper machine, and the bleached wood powder sent to the paper machine. Since the process of making paper using a mixed material of natural pulp and natural pulp is well known, detailed description thereof is omitted in the present invention.
すなわち、本発明は、天然パルプを用いて通常の方法により製紙を行うに当たって、天然パルプと漂白木粉とを混合して製紙を行うことにより、漂白木粉の送り込み量に見合う分だけ白紙の製造に必要な天然パルプの使用量を画期的に低減することができる。 That is, in the present invention, when paper is made by a normal method using natural pulp, natural paper and bleached wood flour are mixed to produce paper, thereby producing white paper as much as the amount of bleached wood flour fed. The amount of natural pulp required for the production can be dramatically reduced.
このように、本発明によれば、天然パルプに所定量の漂白木粉を混入して製紙を行うことにより、漂白木粉のバルク性を向上させて天然パルプの使用量を低減させることができ、しかも、脱水性を向上させて製紙に必要なエネルギーを低減することができるという効果が得られる。 Thus, according to the present invention, by making paper by mixing a predetermined amount of bleached wood powder into natural pulp, it is possible to improve the bulk property of the bleached wood powder and reduce the amount of natural pulp used. Moreover, the effect of improving the dewaterability and reducing the energy required for papermaking can be obtained.
１０：漂白木粉の分散及び送り込み
Ｓ１０：ウッドパルプ乾燥過程
Ｓ２０：分級及び選抜過程
Ｓ３０：漂白過程
Ｓ４０：漂白木粉製造過程
Ｓ５０：漂白木粉分級及び選抜過程
10: Dispersion and feeding of bleached wood powder S10: Wood pulp drying process S20: Classification and selection process S30: Bleaching process S40: Bleached wood powder production process S50: Bleached wood powder classification and selection process
Claims (2)
Ｓ２０：前記ウッドパルプ乾燥過程において乾燥されたウッドパルプを繊維長０．１５ｍｍ以下の木粉に分級し且つ選り抜く木粉分級及び選抜過程と、
Ｓ３０：前記木粉分級及び選抜過程において分級され且つ選び抜かれた木粉を漂白設備に送り込み、５分後にＨ２Ｏ２（過酸化水素）水溶液と塩水を混合して添加し、漂白剤をかけて４０分間攪拌しながら漂白する木粉漂白過程と、
Ｓ４０：前記木粉漂白過程において漂白された木粉にスチームを供給して漂白木粉を乾燥する漂白木粉乾燥過程と、
Ｓ５０：前記漂白木粉乾燥過程において乾燥された漂白木粉を分級し且つ選り抜く漂白木粉分級及び選抜過程と、
を含むことを特徴とする漂白木粉の製造方法。 S10: a wood pulp drying process in which wood is pulverized by a pulverizer into wood pulp and then dried to a moisture content of 1 to 2% by weight;
S20: Wood flour classification and selection process for classifying and selecting wood pulp dried in the wood pulp drying process into wood flour having a fiber length of 0.15 mm or less;
S30: The wood powder classified and selected in the wood powder classification and selection process is sent to a bleaching facility, and after 5 minutes, an H 2 O 2 (hydrogen peroxide) aqueous solution and salt water are mixed and added, and the bleaching agent is applied. And bleaching for 40 minutes with stirring,
S40: A bleaching wood powder drying process in which steam is supplied to the wood powder bleached in the wood powder bleaching process to dry the bleached wood powder;
S50: Bleached wood powder classification and selection process for classifying and selecting the bleached wood powder dried in the bleaching wood powder drying process;
A method for producing bleached wood flour, comprising:
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| KR1020100109662A KR101207845B1 (en) | 2010-11-05 | 2010-11-05 | Wood Particles, Manufacturing Method for paper of using the Same |
| KR10-2010-0109662 | 2010-11-05 | ||
| PCT/KR2011/008430 WO2012060672A2 (en) | 2010-11-05 | 2011-11-07 | Bleached wood powder, a production method for bleached wood powder, paper which uses the same and a production method for the same |
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| WO2021005259A1 (en) * | 2019-07-05 | 2021-01-14 | Upm Plywood Oy | A wood based powder, a composite material comprising the wood based powder, and a method for manufacturing the wood based powder |
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| GB438434A (en) * | 1934-05-16 | 1935-11-18 | Henry Dreyfus | Improvements in the manufacture of cellulose |
| FI61215B (en) * | 1976-11-23 | 1982-02-26 | Defibrator Ab | SAFETY RANGE OF CONTAINER FRAMSTAELLA LIGNOCELLULOSAHALTIGA FIBERMATERIAL |
| JPS59222305A (en) * | 1983-06-01 | 1984-12-14 | 永大化工株式会社 | Method of bleaching chip |
| JP3125489B2 (en) * | 1992-12-11 | 2001-01-15 | 王子製紙株式会社 | Fine lignocellulosic fiber and paper product using the fiber |
| JPH06228898A (en) * | 1993-01-29 | 1994-08-16 | New Oji Paper Co Ltd | Coated printing paper |
| US6605350B1 (en) * | 1996-08-23 | 2003-08-12 | Weyerhaeuser Company | Sawdust alkaline pulp having low average degree of polymerization values and method of producing the same |
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| KR100750875B1 (en) | 2006-03-09 | 2007-08-22 | 충남대학교산학협력단 | Manufacturing method for increasing bulk and stiffness of paperboard by using mechanically and chemically modified wood particles into paperboard middle layers |
| PL2142348T3 (en) * | 2007-04-24 | 2014-05-30 | Basf Se | Method for the production of bleached wood particles and wood materials ranging from light-toned to white |
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