WO2024161882A1 - パルプの製造方法、紙の製造方法、パルプ製造用圧縮物 - Google Patents
パルプの製造方法、紙の製造方法、パルプ製造用圧縮物 Download PDFInfo
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- WO2024161882A1 WO2024161882A1 PCT/JP2023/046892 JP2023046892W WO2024161882A1 WO 2024161882 A1 WO2024161882 A1 WO 2024161882A1 JP 2023046892 W JP2023046892 W JP 2023046892W WO 2024161882 A1 WO2024161882 A1 WO 2024161882A1
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- 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
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- 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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/10—Physical methods for facilitating impregnation
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- 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
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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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
Definitions
- the present disclosure relates to a method for producing pulp, a method for producing paper, and a compressed product for producing pulp. More specifically, the present disclosure relates to a method for producing pulp using palm plants, a method for producing paper, and a compressed product for producing pulp.
- Patent Document 1 describes the production of pulp using the petioles of palm plants. Specifically, it describes a pulp bleaching method in which oil palm petioles are cooked using kraft cooking to a kappa number in the range of 18 to 40, then delignified with oxygen, and further treated in a multi-stage bleaching process including a hydrogen peroxide treatment step.
- Patent Document 2 describes the production of pulp using the trunks of palm plants.
- the method includes at least an oxidation process in which a chemical solution containing nitric acid is impregnated into the raw material in an atmospheric pressure environment to make the raw material porous, and a cooking process in which a chemical solution containing caustic soda is impregnated into the porous raw material in an atmospheric pressure environment and the raw materials are brought into contact with each other by a vortex flow, thereby separating the fibers and lignin of the porous raw material and untangling the fiber bundles.
- Palms of the palm family have a high moisture content and are prone to decay, which means they have poor storage properties. Palms also have a low apparent specific gravity, which means they are inefficient to transport. Therefore, when palms are used to produce pulp for papermaking using the manufacturing methods described in Patent Documents 1 and 2, there is a problem in that productivity is likely to decrease.
- the present disclosure aims to provide a method for producing pulp that is less likely to experience a decrease in productivity even when palm plants are used.
- the present disclosure also aims to provide a method for producing paper using pulp obtained by the above-mentioned pulp production method, and a compressed material for pulp production used in the above-mentioned pulp production method.
- the pulp manufacturing method is a pulp manufacturing method in which a woody material is defibrated by a digestion treatment using an alkaline aqueous solution.
- the woody material includes a compressed material obtained by compressing crushed material of a palm plant, the compressed material having a specific gravity of 0.35 to 1.30 and a moisture content of 25 mass% or less.
- the paper manufacturing method includes a pulping step of producing pulp using the pulp manufacturing method, and a step of obtaining paper by papermaking and drying the pulp.
- the compressed material for pulp production is a compressed material obtained by compressing crushed material of a palm plant.
- the compressed material for pulp production has a specific gravity of 0.35 or more and 1.30 or less, and a moisture content of 25 mass% or less.
- the pulp manufacturing method involves defibrating wood material by a digestion treatment using an alkaline aqueous solution.
- the wood material includes a compressed material obtained by compressing crushed material of a palm plant.
- the compressed material has a specific gravity of 0.35 or more and 1.30 or less.
- the compressed material also has a moisture content of 25% by mass or less.
- the specific gravity of the compressed material obtained by compressing the crushed material of a palm family plant is 0.35 or more and 1.30 or less, so the bulk density of the palm family plant can be increased and the transportation efficiency of the palm family plant is improved.
- the moisture content of the compressed material obtained by compressing the crushed material of a palm family plant is 25 mass% or less, so it is resistant to corrosion and has good storage properties. Therefore, with the pulp manufacturing method of this embodiment, pulp productivity is not likely to decrease even when a palm family plant is used.
- the compressed material for pulp production according to this embodiment is a compressed product of dried crushed material of multiple palm family plants. That is, coconut cuttings and crushed pieces, which are crushed material of palm family plants, are used as raw materials, and after drying, multiple pieces are compressed together to obtain a compressed material for pulp production (compressed biomass material) composed of renewable biological resources (palm family plants).
- the compressed material for pulp production has improved transportability and improved productivity compared to a case where crushed material of palm family plants is not compressed.
- the progression of decay is prevented, the material yield rate can be increased, and productivity is improved.
- the type of palm plant used for the compressed material used in pulp production is not particularly limited, but it can be oil palm, butter palm, coconut palm, date palm, sago palm, acai, palm, etc., although the species that is a social issue is oil palm.
- the parts that can be used are not particularly limited, but can be trunk, leaves, fruit, bunch, seeds, etc.
- the palm plant After being crushed and dried, the palm plant is compressed.
- the order of crushing and drying may be in any order, or they may be carried out simultaneously. There are no particular limitations on the method for crushing the palm plant, but it may be possible to use a chipper, for example. It is preferable to dry the crushed material so that the moisture content is 25% by mass or less, as this prevents the progression of decay.
- the ground material of a palm family plant is an aggregate of fibrous materials (including powdered materials) obtained by grinding the above-mentioned usable parts of a palm family plant.
- the ground material of a palm family plant preferably includes vascular tissue of a palm family plant.
- Vascular tissue of a palm family plant is tissue that transports water and nutrients necessary for the growth of a palm family plant, and includes xylem and phloem.
- Xylem is a transport path for water and nutrients absorbed from the roots, and has vessels and tracheids.
- Phloem is a transport path for nutrients created by the leaves, and has phloem tubes.
- the crushed material of the palm family contains crushed material of a predetermined size.
- the crushed material is preferably crushed material having a length of 0.6 mm to 40.0 mm and an outer diameter of 0.08 mm to 1.5 mm (hereinafter, crushed material in this range will be referred to as "crushed material of good size"). If the length of the crushed material is shorter than 0.6 mm or the outer diameter of the crushed material is smaller than 0.08 mm, the palm family plant vascular tissue contained in the crushed material will be too fine, so the average length of the obtained pulp will be short and the strength of the paper will be easily reduced.
- the length of the crushed material is longer than 40.0 mm or the outer diameter of the crushed material is larger than 1.5 mm, the shape of the pulp constituting the paper will be too rough, so the surface smoothness of the paper will be easily reduced.
- the length of the crushed material is 0.6 mm to 40.0 mm and the outer diameter of the crushed material is 0.08 mm to 1.5 mm, high quality pulp will be obtained.
- the length of the pulverized material is preferably within the range of 5.0 mm to 40.0 mm, and the outer diameter is preferably within the range of 0.3 mm to 1.5 mm. This makes it less likely that the strength of the paper will decrease, and the surface smoothness of the paper will be reduced.
- the length and outer diameter of the pulverized material are obtained by photographing a specified amount of pulverized palm plant or observing it with a magnifying glass, and measuring the length and outer diameter.
- the good size ground material is preferably contained in a mass ratio of 70% or more of the total amount of the ground material of the palm family plant. If this mass ratio falls below 70%, the pulp (fiber component) of a length that contributes to the strength of the paper will be reduced, and the strength of the paper will be likely to decrease. In addition, since the ratio of palm family plant parenchyma tissue, which is the main component of the fine powder, increases in the ground material of the palm family plant, the amount of alkaline aqueous solution used during the cooking process tends to increase, which may result in a decrease in pulp productivity. It is more preferable that the good size ground material is contained in a mass ratio of 80% or more of the total amount of the ground material of the palm family plant, and most preferably 100%.
- the crushed material of a palm family plant is preferably one obtained by crushing a palm family plant and then classifying it to reduce the amount of palm family plant parenchyma tissue.
- the crushed material of a palm family plant contains small crushed material consisting mainly of palm family plant parenchyma tissue and large crushed material consisting mainly of palm family plant vascular tissue, and it is preferable that the crushed material of a palm family plant is one obtained by reducing the amount of the small crushed material.
- Palm family plant parenchyma tissue is tissue composed of palm family plant parenchyma cells. Palm family plant parenchyma tissue contains assimilation tissue, secretion tissue, storage tissue, etc., and has physiological functions such as synthesis, decomposition, and storage.
- the amount of palm family plant parenchyma cell tissue is reduced in order to obtain a crushed product of the palm family plant with a low content of palm family plant parenchyma cell tissue.
- a method for reducing the amount of palm family plant parenchyma cell tissue a method of classifying to remove small-sized crushed material can be used. Methods of classification include sieving, air sorting, water bathing, etc., but are not particularly limited.
- sugars refer to monosaccharides, disaccharides and polysaccharides (including oligosaccharides).
- monosaccharides include fructose, ribose, arabinose, rhamnose, xylulose and deoxyribose.
- disaccharides include sucrose, maltose, trehalose, turanose, lactulose, maltulose, palatinose, gentiobiulose, melibiulose, galactosucrose, rutinulose and planteobiose.
- polysaccharides examples include starch, agarose, alginic acid, glucomannan, inulin, chitin, chitosan, hyaluronic acid, glycogen and cellulose.
- oligosaccharides include fructooligosaccharides, galactooligosaccharides, mannanoligosaccharides, and stachyose. It is preferable to reduce the amount of sugars by 50% or more from the state before washing. It is also preferable to reduce the amount of ash when washing palm plants, as this can reduce the occurrence of process problems caused by ash during the cooking process described below.
- the compressed material for pulp production of this embodiment is obtained by compressing and integrating multiple dried pulverized materials. That is, the compressed material for pulp production of this embodiment includes dried pulverized materials of multiple palm plants (biomass), and is a compressed material in which these pulverized materials are integrated.
- the shape of the compressed material for pulp production may be pellet-shaped, tablet-shaped, briquette-shaped, block-shaped, plate-shaped, etc., but is not particularly limited.
- Pellet-shaped compressed materials can be obtained using a known pelletizer such as a flat die type molding machine or a ring die type molding machine. Tablet-shaped compressed materials can be obtained using a known tablet molding machine using a mold having a cavity corresponding to the shape of the compressed material.
- Briquette-shaped compressed materials can be obtained, for example, using a mold with open front and back, and a pulverized material is placed in the mold with an already molded compressed material placed on one open side, and a known briquetteer such as a molding machine that pressurizes and compresses the pulverized material from the other open side and advances the compressed material.
- Block-shaped compressed materials can be obtained using known compactors, such as a uniaxial compactor in which the crushed material is placed in a frame with one side open and compressed by applying pressure from the open side, or a triaxial compactor in which compression is performed from three sides.
- Plate-shaped compressed materials can be obtained by stacking the crushed material to form a mat and compressing the mat in the thickness direction. When compressing the crushed material, no adhesive is used, and the material is integrated by compression force, although adhesives may be used as long as they do not interfere with defibrating the wood material.
- the surface area of the compressed material for pulp production in this embodiment is preferably 15 cm2 or less.
- the chemical solution during the cooking process is more likely to permeate the compressed material for pulp production, and the defibration of the wood material is more likely to proceed.
- the specific gravity of the compressed material for pulp production in this embodiment is preferably in the range of 0.35 to 1.30. If the specific gravity of the compressed material for pulp production is less than 0.35, the mechanical durability of the compressed material for pulp production decreases, and it becomes easier to break or crack during transportation. If the specific gravity of the compressed material for pulp production is greater than 1.30, the chemical solution (such as an alkaline aqueous solution) does not penetrate easily during cooking, and it may not be possible to fully defibrate it. Even if it is possible to defibrate it, the fibrous tissue constituting the crushed material of the palm family plant may be compressed and damaged, resulting in an increase in fine fibers, which may lead to a decrease in the strength properties of the paper obtained in the end.
- the chemical solution such as an alkaline aqueous solution
- the specific gravity of the compressed material for pulp production is more preferably in the range of 0.40 to 1.30. If it is less than 0.40, the bulk density becomes high, which becomes volumetrically limited during transportation, and the number of round trips during transportation increases. For this reason, it is more preferable that the specific gravity of the compressed biomass product is in the range of 0.40 to 1.30.
- the compressed material for pulp production in this embodiment preferably has a moisture content of 25% by mass or less, and more preferably 20% by mass or less. If the moisture content is higher than 25% by mass, the compressed material for pulp production is likely to be less able to maintain its shape, and at the same time, it is more likely to become moldy and spoil, which means that its storage properties are also likely to be reduced. There is no particular lower limit for the moisture content of the compressed material for pulp production, and it may be any value that is 0% by mass or more.
- the pulp manufacturing method according to this embodiment involves defibrating a wood material containing the compressed material for pulp manufacturing by a digestion treatment using an alkaline aqueous solution.
- the pulp manufacturing method according to this embodiment uses the compressed material for pulp manufacturing, so that pulp of stable quality can be easily produced even when a palm plant with low bulk density is used.
- the wood material only the compressed material for pulp manufacturing may be used, or the compressed material for pulp manufacturing may be used in combination with ground material of tropical wood or coniferous trees that have traditionally been used in paper manufacturing.
- the alkaline aqueous solution is an aqueous solution containing alkaline components such as sodium hydroxide, sodium sulfide, and mixtures thereof.
- the concentration of the alkaline components is not particularly limited, but is preferably 0.5% by mass or more and 10% by mass or less.
- Cooking is a process in which wood materials are treated with a high-temperature alkaline solution to dissolve and separate the lignin contained in the wood materials, resulting in wood fibers (mainly vascular tissue of palm plants).
- a high-temperature alkaline solution to dissolve and separate the lignin contained in the wood materials, resulting in wood fibers (mainly vascular tissue of palm plants).
- the reaction can be carried out in a digester or autoclave using an alkaline solution at a temperature of 90 to 180°C.
- drying is performed as necessary. Drying is a process to reduce the moisture content of the defibrated wood fibers. Drying can be performed by supplying hot air to the defibrated wood fibers. There are no particular limitations on the moisture content of the wood fibers after drying, but it is preferable that the moisture content be 20 mass% or less of the total amount of wood fibers after bone drying.
- the wood fibers obtained in this way can be used as pulp.
- the paper manufacturing method includes a pulping step and a paper obtaining step.
- the pulping step is a step of manufacturing pulp by the above-mentioned pulp manufacturing method.
- the paper obtaining step is a step of making paper from the pulp obtained in the pulping step and drying the paper.
- the paper can be made using, for example, a Fourdrinier paper machine, a cylinder paper machine, or a hand paper machine.
- the drying step is to dry the made pulp using a dryer until it reaches a predetermined moisture content.
- the first aspect is a method for producing pulp by defibrating a wood material by a digestion treatment using an alkaline aqueous solution.
- the wood material includes a compressed material obtained by compressing crushed material of a palm plant, the compressed material having a specific gravity of 0.35 to 1.30 and a moisture content of 25 mass % or less.
- palm plants have good storage properties and are also efficient in transportation. Therefore, there is an advantage that pulp productivity is not likely to decrease even when palm plants are used.
- a second aspect is the method for producing pulp according to the first aspect, wherein the surface area of the compressed product is 15 cm2 or less.
- the chemical solution (such as an alkaline aqueous solution) can easily penetrate into the compressed material during the cooking process, facilitating defibration.
- the third aspect is the method for producing pulp according to the first or second aspect, in which the pulverized material contains pulverized material having a length of 0.6 mm to 40.0 mm and an outer diameter of 0.08 mm to 1.5 mm.
- the content of pulverized material of the above size is 70% by mass or more relative to the total mass of the pulverized material.
- the fourth aspect is a method for producing pulp according to any one of the first to third aspects, in which the pulverized material is obtained by pulverizing the palm plant and then classifying it to reduce the amount of parenchyma cell tissue.
- the fifth aspect is a method for producing pulp according to any one of the first to fourth aspects, in which the crushed material is obtained by crushing the palm plant and then washing it with water to reduce the amount of sugar.
- This embodiment produces pulp with reduced sugar content, reducing poor drying during the papermaking process.
- the sixth aspect is a method for producing paper, which includes a pulping step of producing pulp using the pulp production method, and a step of producing paper by papermaking and drying the pulp.
- palm plants have good storage properties and are also efficient in transportation. Therefore, there is an advantage that pulp productivity is not likely to decrease even when palm plants are used.
- Example 1 As a raw material for biomass paper pulp, the trunk part (OPT) was extracted from oil palm and put into a chipper to obtain biomass powder of 20 mm to 40 mm size.
- OPT trunk part
- the material was classified by passing it through a 10 mesh sieve and then through a 200 mesh sieve to reduce the proportion of parenchyma cells, resulting in a biomass pulverized material (pulverized material of palm plants) with an average length of 25 mm, an average outer diameter of 1.0 mm, and a good-sized pulverized material content of 80%.
- This pulverized material was washed with water to reduce the amount of sugars.
- This ground material was used as the raw material and compressed into cylindrical pellets with a diameter of 10 mm and a length of 50 mm using a pelletizer, resulting in a compressed biomass material (compressed material for pulp production) with a specific gravity of 0.95 and a moisture content of 12%.
- the compressed material and a 5% aqueous solution of sodium hydroxide were placed in an autoclave at a liquid ratio of 1:4 (1 mass of compressed material to 4 masses of 5% aqueous solution of sodium hydroxide).
- Example 2 Using OPT as the raw material for pulp, a pulverized product having an average length of 30 mm, an average outer diameter of 1.2 mm, and a content of good-sized pulverized product of 85% was produced in the same manner as in Example 1.
- the crushed material was compressed using a briquette to form briquettes with a diameter of 50 mm and a length of 40 mm, yielding a compressed biomass material (compressed material for pulp production) with a specific gravity of 1.00 and a moisture content of 11%. Pulp was obtained in the same manner as in Example 1, except that such compressed biomass material was used.
- Example 3 Using OPT as the raw material for pulp, a pulverized product having an average length of 20 mm, an average outer diameter of 1.5 mm, and a content of good-sized pulverized product of 90% was produced in the same manner as in Example 1.
- Example 4 Coconut trunks were used as the raw material for pulp, and a ground product with an average length of 23 mm, an average outer diameter of 1.0 mm, and a good-sized ground product content of 80% was produced using the same process as in Example 1.
- a pelletizer was used to compress the ground material, producing cylindrical pellets with a diameter of 10 mm and a length of 50 mm, to obtain a compressed biomass material (compressed material for pulp production) with a specific gravity of 1.05 and a moisture content of 12%. Pulp was obtained in the same manner as in Example 1, except that such a compressed biomass material was used.
- Example 5 Using OPT as the raw material for pulp, a pulverized product having an average length of 20 mm, an average outer diameter of 1.0 mm, and a content of good-sized pulverized product of 85% was produced in the same manner as in Example 1.
- a pelletizer was used to compress the ground material, producing cylindrical pellets with a diameter of 8 mm and a length of 30 mm, to obtain a compressed biomass material (compressed material for pulp production) with a specific gravity of 0.95 and a moisture content of 10%. Pulp was obtained in the same manner as in Example 1, except that such a compressed biomass material was used.
- Example 6 Using OPT as the raw material for pulp, a pulverized product having an average length of 30 mm, an average outer diameter of 1.5 mm, and a content of good-sized pulverized product of 60% was produced in the same manner as in Example 1.
- a pelletizer was used to compress the ground material, producing cylindrical pellets with a diameter of 10 mm and a length of 50 mm, to obtain a compressed biomass material (compressed material for pulp production) with a specific gravity of 1.15 and a moisture content of 10%. Pulp was obtained in the same manner as in Example 1, except that such a compressed biomass material was used.
- a pelletizer was used to compress the ground material, producing cylindrical pellet-like compressed material with a diameter of 10 mm and a length of 50 mm, to obtain a compressed biomass material (compressed material for pulp production) with a specific gravity of 1.40 and a moisture content of 9%.
- An attempt was made to obtain pulp in the same manner as in Example 1, except that such compressed biomass material was used, but defibration was insufficient and pulp usable for making paper could not be obtained.
- the crushed material was compressed using a briquette to form briquettes with a diameter of 50 mm and a length of 40 mm, yielding a compressed biomass material (compressed material for pulp production) with a specific gravity of 1.10 and a moisture content of 30%. Pulp was obtained in the same manner as in Example 1, except that such compressed biomass material was used.
- the mixture was defibrated using a pulper at 10,000 revolutions (in accordance with JIS P8220-1).
- the disintegrated pulp slurry was passed through a test flat screen with an 18-cut screen (slit width: 0.3 mm) to remove coarse fibers such as undigested fibers.
- the screened pulp was beaten at 10,000 rpm using a PFI mill (in accordance with JIS P8221-2).
- Paper with a basis weight of 60 g/ m2 was made from the beaten pulp using a standard hand sheet (in accordance with JIS P8222).
- the mold resistance of the compressed biomass material was measured based on "JIS Z 2911 mold resistance test method.” (judgement) A: 14 days or more B: 10 days or more but less than 14 days C: Less than 10 days
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Abstract
Description
(1)概要
本実施形態に係るパルプの製造方法は、アルカリ水溶液を用いた蒸解処理により、木質材料を解繊するものである。前記木質材料は、ヤシ科植物の粉砕物を圧縮して得られる圧縮物を含む。前記圧縮物は、比重が0.35以上1.30以下である。また前記圧縮物は、含水率が25質量%以下である。
<パルプ製造用圧縮物>
本実施形態に係るパルプ製造用圧縮物は、乾燥した複数のヤシ科植物の粉砕物の圧縮物である。すなわち、ヤシ科植物の粉砕物であるヤシ切削片や圧壊片を原料として、これらを乾燥した後、複数まとめて圧縮することにより、再生可能な生物資源(ヤシ科植物)から構成されるパルプ製造用圧縮物(バイオマス圧縮物)が得られる。パルプ製造用圧縮物は、ヤシ科植物の粉砕物を圧縮しない場合に比べて、搬送性が改善され、生産性が改善される。また、乾燥した粉砕物を用いるため、腐敗の進行を妨げ、材料の歩留まり率を高めることができ、生産性が改善される。
本実施形態に係るパルプの製造方法は、アルカリ水溶液を用いた蒸解処理により、上記パルプ製造用圧縮物を含む木質材料を解繊するものである。本実施形態のパルプの製造方法は、パルプ製造用圧縮物を使用することにより、嵩密度が低いヤシ科植物を用いた場合でも、安定した品質のパルプを容易に生産することができる。なお、木質材料としては、パルプ製造用圧縮物のみを使用してもよいし、従来、紙の製造に使用されている南洋材や針葉樹の粉砕物とパルプ製造用圧縮物とを併用してもよい。
本実施形態に係る紙の製造方法は、パルプ化工程と、紙を得る工程と、を備える。パルプ化工程は、上記パルプの製造方法でパルプを製造する工程である。紙を得る工程は、パルプ化工程で得られたパルプを抄造及び乾燥することである。抄造は、例えば、長網抄紙機、円網抄紙機、あるいは手抄き機などを用いて行うことができる。乾燥は、ドライヤを使用して所定の含水率になるまで抄造後のパルプを乾かす。
第1の態様は、アルカリ水溶液を用いた蒸解処理により、木質材料を解繊するパルプの製造方法である。前記木質材料が、ヤシ科植物の粉砕物を圧縮して得られる、比重が0.35以上1.30以下であり、含水率が25質量%以下である圧縮物を含む。
バイオマスの紙用パルプの原料として、アブラヤシから幹部分(OPT)を取り出し、それらをチッパーに投入することで、20mm~40mmサイズのバイオマス粉砕物を得た。
パルプの原料として、OPTを用い、実施例1と同様の工程で平均長30mm、平均外径1.2mm、良好サイズ粉砕物含有率85%の粉砕物を作製した。
パルプの原料として、OPTを用い、実施例1と同様の工程で平均長20mm、平均外径1.5mm、良好サイズ粉砕物含有率90%の粉砕物を作製した。
パルプの原料として、ココヤシの幹部分を使い、実施例1と同様の工程で平均長23mm、平均外径1.0mm、良好サイズ粉砕物含有率80%の粉砕物を作製した。
パルプの原料として、OPTを用い、実施例1と同様の工程で平均長20mm、平均外径1.0mm、良好サイズ粉砕物含有率85%の粉砕物を作製した。
パルプの原料として、OPTを用い、実施例1と同様の工程で平均長30mm、平均外径1.5mm、良好サイズ粉砕物含有率60%の粉砕物を作製した。
パルプの原料として、OPTを用い、実施例1と同様の工程で平均長35mm、平均外径1.5mm、良好サイズ粉砕物含有率90%の粉砕物を作製した。
パルプの原料として、OPTを使い、実施例1と同様の工程で平均長15mm、平均外径0.8mm、良好サイズ粉砕物含有率70%の粉砕物を作製した。
パルプの原料として、OPTを用い、実施例1と同様の工程で平均長25mm、平均外径1.0mm、良好サイズ粉砕物含有率80%の粉砕物を作製した。
成形後のバイオマス圧縮物に対し、一般社団法人日本木質ペレット協会の木質ペレット品質規格に基づき、バイオマス圧縮物の機械的耐久性DUを測定した。
DU=(m1/m0)×100(%)
m0:試験前質量
m1:試験後質量
(判定)
A:97.5%以上
B:96.5%以上97.5%未満
C:96.5%未満
「JISZ 2911カビ抵抗性試験方法」に基づき、バイオマス圧縮物のカビ抵抗性を測定した。
(判定)
A:14日以上
B:10日以上14日未満
C:10日未満
「離解したパルプのスラリーを18カットスクリーン(スリット幅:0.3mm)の試験用フラットスクリーンを通した際にスクリーン通過率Sを測定した。
S=(m1/m0)×100(%)
m0:スクリーン通過前パルプ質量
m1:スクリーン通過後パルプ質量
※パルプ質量は全乾状態(105℃乾燥機内で恒量に達したときの状態)にして測定。
(判定)
A:95%以上
B:90%以上95%未満
C:90%未満
「JIS P 8113紙及び板紙-引張特性の試験方法-第2部:定速伸張法」に基づき、紙の引張試験を行い、比引張強度を測定した。
(判定)
A:35Nm/g以上
B:25Nm/g以上35Nm/g未満
C:25Nm/g未満
Claims (7)
- アルカリ水溶液を用いた蒸解処理により、木質材料を解繊するパルプの製造方法であって、
前記木質材料が、ヤシ科植物の粉砕物を圧縮して得られる、比重が0.35以上1.30以下であり、含水率が25質量%以下である圧縮物を含む、
パルプの製造方法。 - 前記圧縮物の表面積が、15cm2以下である、
請求項1に記載のパルプの製造方法。 - 前記粉砕物が、長さ0.6mm以上40.0mm以下、外径0.08mm以上1.5mm以下の大きさを有する粉砕物を含有し、
前記大きさの粉砕物の含有率が、前記粉砕物の全質量に対して70質量%以上である、
請求項1に記載のパルプの製造方法。 - 前記粉砕物が、前記ヤシ科植物を粉砕した後、分級して柔細胞組織を減量したものである、
請求項1に記載のパルプの製造方法。 - 前記粉砕物が、前記ヤシ科植物を粉砕した後、水洗して糖類を減量したものである、
請求項1に記載のパルプの製造方法。 - 請求項1~5のいずれか1項に記載のパルプの製造方法でパルプを製造するパルプ化工程と、
前記パルプを抄造及び乾燥することにより紙を得る工程と、を含む、
紙の製造方法。 - ヤシ科植物の粉砕物が圧縮された圧縮物であり、
比重が0.35以上1.30以下であり、含水率が25質量%以下である、
パルプ製造用圧縮物。
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060032495A (ko) * | 2004-10-12 | 2006-04-17 | 조광호 | 팜나무의 부산물을 이용한 펄프원료 제조방법 및 장치 |
| WO2009001577A1 (ja) * | 2007-06-27 | 2008-12-31 | Taizen Co., Ltd. | パーム椰子を原料とする紙料調整装置 |
| JP2011001677A (ja) * | 2010-01-08 | 2011-01-06 | Toa Kogyo:Kk | パルプ製造装置、パルプ製造方法及び高濃度パルパー |
| WO2023095463A1 (ja) * | 2021-11-29 | 2023-06-01 | パナソニックIpマネジメント株式会社 | 繊維ボードの製造方法 |
-
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- 2023-12-27 WO PCT/JP2023/046892 patent/WO2024161882A1/ja not_active Ceased
- 2023-12-27 CN CN202380082324.1A patent/CN120283093A/zh active Pending
- 2023-12-27 JP JP2024574337A patent/JPWO2024161882A1/ja active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060032495A (ko) * | 2004-10-12 | 2006-04-17 | 조광호 | 팜나무의 부산물을 이용한 펄프원료 제조방법 및 장치 |
| WO2009001577A1 (ja) * | 2007-06-27 | 2008-12-31 | Taizen Co., Ltd. | パーム椰子を原料とする紙料調整装置 |
| JP2011001677A (ja) * | 2010-01-08 | 2011-01-06 | Toa Kogyo:Kk | パルプ製造装置、パルプ製造方法及び高濃度パルパー |
| WO2023095463A1 (ja) * | 2021-11-29 | 2023-06-01 | パナソニックIpマネジメント株式会社 | 繊維ボードの製造方法 |
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