JP2002294582A - Method for producing bulky pulp - Google Patents
Method for producing bulky pulpInfo
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- JP2002294582A JP2002294582A JP2001100473A JP2001100473A JP2002294582A JP 2002294582 A JP2002294582 A JP 2002294582A JP 2001100473 A JP2001100473 A JP 2001100473A JP 2001100473 A JP2001100473 A JP 2001100473A JP 2002294582 A JP2002294582 A JP 2002294582A
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- pulp
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は印刷用紙、情報記録用
紙、特殊紙等の種々の紙製品に使用される嵩高パルプを
製造する方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing bulky pulp used for various paper products such as printing paper, information recording paper, special paper and the like.
【０００２】[0002]
【従来の技術】紙製品は、その使用目的に応じて、様々
な物性が要求される。例えば、機械的強度、寸法安定
性、地合等である。近年これらの物性の中で、特に重要
性を増してきたものに嵩高性があげられる。嵩高い紙
は、その感触が良好な為、種々の嵩高紙の製造方法が検
討されている。2. Description of the Related Art Paper products are required to have various physical properties depending on the purpose of use. For example, mechanical strength, dimensional stability, formation, and the like. Among these physical properties in recent years, bulkiness has been particularly important. Since bulky paper has a good feel, various methods for producing bulky paper are being studied.
【０００３】例えば、特開平1-118625号公報ではパルプ
と炭素繊維製造用有機繊維及び有機高分子物質のエマル
ジョンの特定割合からなる抄紙シートを加熱処理後、加
熱炭化させることにより、嵩高な炭素板を得ている。For example, in Japanese Patent Application Laid-Open No. 1-118625, a bulky carbon plate is prepared by heat-treating a papermaking sheet made of a specific ratio of pulp, an organic fiber for producing carbon fiber and an organic polymer substance, and then heating and carbonizing it. Have gained.
【０００４】同様に、特開平3-174089号公報ではガラス
ウール等の鉱物繊維をセルロース繊維に混合することに
より嵩高で剛性のあるパルプを得ている。特開平3-2691
99号公報においては、パルプと特定のポリエステル複合
繊維と熱融着性バインダー繊維を高速撹拌ミキサーで混
合分散後積層し、熱処理することにより、崇高なパルプ
シートを製造している。[0004] Similarly, in Japanese Patent Application Laid-Open No. 3-174089, a bulky and rigid pulp is obtained by mixing mineral fibers such as glass wool with cellulose fibers. JP-A-3-2691
In Japanese Patent Publication No. 99, a noble pulp sheet is manufactured by mixing and dispersing pulp, a specific polyester composite fiber, and a heat-fusible binder fiber with a high-speed stirring mixer, and then laminating and heat-treating.
【０００５】また、填料を改良した例としては、特開平
3-124895号公報において粒子径0.5μｍ〜30μｍの範囲
にある中空球状バテライト型炭酸カルシウムを填料とし
て紙中に3％以上含有させることにより、嵩高な中性紙
の製造を行っている。[0005] An example of an improved filler is disclosed in
In Japanese Patent Application Laid-Open No. 3-124895, a bulky neutral paper is produced by incorporating 3% or more of hollow spherical vaterite-type calcium carbonate having a particle diameter in the range of 0.5 μm to 30 μm in a paper as a filler.
【０００６】しかしながら、上記の方法は、パルプに対
して他の繊維、高分子物質あるいは填料等を添加するこ
とにより、紙を嵩高化するものであり、嵩高性が得られ
るのは、添加物によるものであり、セルロース繊維その
ものが改質されるものではない。また、添加された他の
繊維や高分子物質等により、紙の性質が大きく左右され
ることになる。[0006] However, in the above-mentioned method, paper is made bulky by adding other fibers, polymer substances or fillers to the pulp. And the cellulose fibers themselves are not modified. In addition, the properties of the paper are greatly affected by other fibers and polymer substances added.
【０００７】さらに、弾性ロールを用いてカレンダー仕
上げをする、”ソフトカレンダー”処理も試みられてい
る。特開平4-370293号公報ではグラビア用紙のカレンダ
ー処理直線に、低圧で軽度の加熱蒸気（蒸気圧１ｋｇ／
ｃｍ2以下、蒸気流量15〜18ｋｇ／Ｈｒ／ｍ幅、紙の水
分増加率0.3〜1.2％の蒸気）を付与して紙面を加湿、加
熱後、カレンダーロール温度100〜150℃でソフトカレン
ダー処理をすることにより、目的の嵩高紙を得ている。
ソフトカレンダー法では、カレンダー処理における“紙
の押しつぶし方”を柔らかくする方法であり、セルロー
ス繊維そのものが従来法に比べて嵩高な性質に改質され
るものではない。また、紙の製造工程の中でロールは比
較的高いので、その初期投資額は大きくなる。Further, a "soft calender" treatment for calendering using an elastic roll has been attempted. In Japanese Patent Application Laid-Open No. Hei 4-370293, low-pressure, mild heating steam (steam pressure 1 kg /
cm 2 or less, the steam flow rate 15~18kg / Hr / m width, humidify the paper by imparting moisture increase from 0.3 to 1.2% of steam) of the paper, after heating, a soft calender treatment at the calender roll temperature 100 to 150 ° C. By doing so, the desired bulky paper is obtained.
The soft calendering method is a method of softening the “paper crushing method” in the calendering process, and does not modify the cellulose fiber itself into a bulky property as compared with the conventional method. Also, since the rolls are relatively high in the paper manufacturing process, the initial investment is high.
【０００８】さらに繊維そのものを嵩高にする方法とし
て、特開平7-54293号公報ではセルラーゼ、ヘミセルラ
ーゼ等の多糖類分解酵素あるいはそれらを生産する微生
物でパルプを処理することにより、パルプそのものを嵩
高な性質に改質し、嵩高紙を得る方法が開示されてい
る。しかしながら、この方法では酵素が高価であるこ
と、本質的に多糖類を分解する酵素であるためその制御
が難しく、過剰に反応を行えば繊維そのものが分解され
強度が低下してしまう。また、特開平7-189168号公報、
特開平8-291494号公報にはパルプを水酸化ナトリウムで
処理することによりパルプを嵩高する方法が記載されて
いるが、この方法では強度の低下が大きい。Further, as a method for making the fiber itself bulky, Japanese Patent Application Laid-Open No. 7-54293 discloses that the pulp itself is made bulky by treating the pulp with a polysaccharide-degrading enzyme such as cellulase or hemicellulase or a microorganism producing them. A method for modifying the properties to obtain bulky paper is disclosed. However, in this method, since the enzyme is expensive and is an enzyme that essentially decomposes the polysaccharide, it is difficult to control the enzyme. If the reaction is performed excessively, the fiber itself is decomposed and the strength is reduced. Also, JP-A-7-189168,
Japanese Patent Application Laid-Open No. 8-291494 describes a method of treating pulp with sodium hydroxide to increase the bulk of the pulp. However, this method has a large decrease in strength.
【０００９】また、繊維そのものを嵩高にする別の方法
として、特開平8-13381号公報では製紙用パルプ及び／
または脱墨処理などを行って回収された古紙からなる原
料を解繊することにより、繊維を嵩高にしソフトな感触
を有する紙の製造方法が開示されている。しかし、この
発明の主目的はソフトな感触を有し、吸水性、吸油性に
優れた紙を提供することであり、パルプ繊維に撚れを起
こさせて嵩高化するものであり、寸法安定性が悪化して
しまう。また、吸水剤や給油剤を添加することや水溶性
高分子フィルムを積層することが行われている。さら
に、その対象材料として、ミルクカートン古紙といった
元々嵩高である材料が用いられている。また、この方法
では乾燥したシート状のパルプを再度離解するために、
その処理時間がかかるとともに、パルプスラリーが流れ
ていく通常のファイバーラインに応用することは難しか
った。As another method for increasing the bulk of the fiber itself, JP-A-8-13381 discloses a papermaking pulp and / or
Alternatively, there is disclosed a method for producing paper having a soft feel by making the fibers bulky by defibrating raw materials made of waste paper collected by performing a deinking treatment or the like. However, the main object of the present invention is to provide a paper having a soft feel and excellent water absorbency and oil absorbency. Will get worse. Further, addition of a water absorbing agent and a lubricating agent and lamination of a water-soluble polymer film have been performed. Further, as the target material, a material which is originally bulky, such as waste milk carton paper, is used. Also, in this method, in order to defibrate the dried sheet pulp again,
The processing time is long, and it has been difficult to apply the method to an ordinary fiber line in which a pulp slurry flows.
【００１０】[0010]
【発明が解決しようとする課題】本発明では、上記現状
を鑑み、通常の製紙用パルプを現状のファイバーライン
の中で簡単にしかも短い時間の処理で嵩高化することが
可能で、かつ初期投資も少なくてすむような方法で原料
であるパルプそのものを嵩高化することにより、製品で
ある紙の嵩高性を改良することを目的としている。SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention makes it possible to increase the bulk of ordinary papermaking pulp in a current fiber line easily and in a short time, and to reduce the initial investment. An object of the present invention is to improve the bulkiness of paper, which is a product, by increasing the bulk of pulp itself, which is a raw material, by a method that requires less heat.
【００１１】[0011]
【課題を解決するための手段】本発明者らは、パルプを
酸性条件下で撹拌処理することにより嵩高パルプを製造
できることを見い出した。即ち、酸性下でパルプにせん
断応力を与えるように撹拌処理することによりパルプそ
のものを嵩高化し、この方法により改質された嵩高パル
プを用いて紙を製造することにより、嵩高性の良好な紙
を得ることが可能となった。DISCLOSURE OF THE INVENTION The present inventors have found that bulky pulp can be produced by stirring pulp under acidic conditions. That is, the pulp itself is made bulky by performing a stirring treatment so as to give a shear stress to the pulp under acidity, and a paper having good bulkiness is produced by producing paper using the bulky pulp modified by this method. It became possible to obtain.
【００１２】[0012]
【発明の実施の形態】パルプを酸性条件下で撹拌処理す
ることによって、パルプ繊維が嵩高化される機構につい
ては明白ではない。繊維の分析においては繊維長は特に
変化なく、カールやキンクといった繊維の屈曲性にも特
に大きな変化は認められないので、繊維全体の形態が変
化を起こしているのではない。従って、本発明で製造さ
れた嵩高パルプは寸法安定性に影響を与えない。酸性条
件下ではパルプ繊維は剛直な状態であるので、強烈なせ
ん断応力をかけることにより繊維表面が改質されるので
はないかと考えられる。すなわち、せん断応力が繊維表
面に選択的に作用することにより、繊維表面に一部傷が
入り、繊維表面が毛羽だった様な形状になるのではない
かと推測される。BEST MODE FOR CARRYING OUT THE INVENTION The mechanism by which pulp fibers are bulked by stirring the pulp under acidic conditions is not clear. In the analysis of the fiber, the fiber length is not particularly changed, and there is no particularly large change in the flexibility of the fiber such as curl or kink. Therefore, the bulky pulp produced by the present invention does not affect the dimensional stability. Under acidic conditions, the pulp fiber is in a rigid state, and it is considered that the fiber surface may be modified by applying a strong shear stress. In other words, it is presumed that the shear stress selectively acts on the fiber surface, thereby partially damaging the fiber surface and causing the fiber surface to assume a fluffy shape.
【００１３】本発明で対象とするパルプの種類として
は、未晒しクラフトパルプ、酸素脱リグニン後クラフト
パルプ、半晒クラフトパルプ、全晒クラフトパルプ、サ
ルファイトパルプ、グラウンドパルプ、脱墨パルプ、サ
ーモメカニカルパルプ、非木材パルプ等である。The types of pulp to be used in the present invention include unbleached kraft pulp, kraft pulp after oxygen delignification, semi-bleached kraft pulp, fully bleached kraft pulp, sulfite pulp, ground pulp, deinked pulp, and thermomechanical. Pulp and non-wood pulp.
【００１４】処理するパルプ濃度としてはパルプを流動
化でき、パルプ繊維に対してせん断応力を与えられる範
囲であれば特に限定されないが、0.5重量％〜50重量％
が好ましく、特に6重量％〜14重量％が好ましい。パル
プ濃度が50重量％より高くなるとパルプを撹拌すること
ができなくなり、0.5重量％より低くなるとパルプ繊維
にせん断応力がかからないためパルプが嵩高化されな
い。The concentration of the pulp to be treated is not particularly limited as long as the pulp can be fluidized and a shear stress can be applied to the pulp fiber.
Is preferred, and particularly preferably 6 to 14% by weight. If the pulp concentration is higher than 50% by weight, the pulp cannot be agitated. If the pulp concentration is lower than 0.5% by weight, the pulp fibers are not subjected to shear stress, so that the pulp is not bulked.
【００１５】また、処理ｐＨはセルロース繊維が膨潤せ
ずに剛直なままである酸性でれば良く、ｐＨ1〜6が好ま
しく、特にｐＨ2〜4が好ましい。ｐＨが6より高いと、
繊維が膨潤し柔軟になるため良好な結果は得られない。
ｐＨが1より低いと、ｐＨを低下させるための酸の量が
多くなり、その分コストが上昇することになる。ｐＨを
酸性にするための酸としては、鉱酸、有機酸のいずれで
も使用することができる。[0015] The treatment pH may be any acidic as long as the cellulose fibers remain rigid without swelling, and are preferably pH 1 to 6, particularly preferably pH 2 to 4. If the pH is higher than 6,
Good results cannot be obtained because the fibers swell and become soft.
When the pH is lower than 1, the amount of the acid for lowering the pH increases, and the cost increases accordingly. As the acid for making the pH acidic, any of a mineral acid and an organic acid can be used.
【００１６】処理温度としては0〜70℃が好ましく、30
〜70℃が特に好ましい。温度を70℃より高くすると加温
するためのコストがかかり、逆に低すぎると冷却するた
めのコストがかかることになる。The processing temperature is preferably from 0 to 70 ° C.,
~ 70 ° C is particularly preferred. If the temperature is higher than 70 ° C., the cost for heating is high, and if it is too low, the cost for cooling is high.
【００１７】パルプを流動化しせん断応力をかけるため
には、撹拌機のローターの周速が5ｍ／秒以上200ｍ／
秒、若しくはローターの回転数が100ｒｐｍ〜10000ｒｐ
ｍ、好ましくは1000ｒｐｍ〜3000ｒｐｍであることが望
ましい。ローターの周速が5ｍ／秒より遅いか、ロータ
ーの回転数が100ｒｐｍ未満であればパルプに十分なせ
ん断応力がかからない。ローターの周速が200ｍ／秒よ
り速いか、ローターの回転数が10000ｒｐｍを越えても
嵩高の効果は頭打ちになる上、コストが高くなる。ま
た、パルプを撹拌する装置としては、パルプの漂白に使
われるケミカルミキサーとして中濃度ミキサーや低濃度
ミキサー、古紙の離解に用いられる高濃度パルパー、古
紙の脱墨に用いられるニーダーやディスパーザー等が挙
げられる。In order to fluidize the pulp and apply shear stress, the peripheral speed of the rotor of the stirrer is 5 m / sec or more and 200 m / sec.
Seconds or rotation speed of rotor is 100rpm ~ 10000rpm
m, preferably 1000 rpm to 3000 rpm. If the peripheral speed of the rotor is lower than 5 m / sec or the rotation speed of the rotor is less than 100 rpm, sufficient shear stress is not applied to the pulp. Even if the peripheral speed of the rotor is higher than 200 m / sec or the rotational speed of the rotor exceeds 10,000 rpm, the effect of bulkiness will level off and the cost will increase. In addition, as a device for stirring pulp, a chemical mixer used for bleaching pulp, a medium-concentration mixer or a low-concentration mixer, a high-concentration pulp used for disintegrating used paper, a kneader or disperser used for deinking used paper, and the like. No.
【００１８】本発明の嵩高パルプは、印刷用紙、情報用
紙、コート紙他全ての紙に使用される。The bulky pulp of the present invention is used for printing paper, information paper, coated paper and all other papers.
【００１９】[0019]
【実施例】以下に実施例を挙げて本発明を説明するが、
本発明はこれに限定されるものではない。EXAMPLES The present invention will be described below with reference to examples.
The present invention is not limited to this.
【００２０】［実施例１］広葉樹の酸素脱リグニン後ク
ラフトパルプ（日本製紙株式会社製）を中濃度ミキサー
（ＣＲＳ社製）で、パルプ濃度10重量％、ｐＨ3.0、温
度50℃、3000ｒｐｍの条件で10秒間撹拌処理を行った。
得られたパルプを洗浄液のｐＨが中性になるまで水で洗
浄した後、JIS P 8221-2に従いＰＦＩミルで叩解し、
フリーネスの異なるパルプを調製した。次に、得られた
パルプから丸型シートマシンを用い、JIS P 8209に従
い、秤量60ｇ／ｍ2の手抄き紙を調製した。また、叩解
後のフリーネスをJIS P 8121に従い測定した。得られ
た手抄シートの厚さをJIS P8118、坪量をISO 536-197
6に従いそれぞれ測定し、密度を算出し、結果を図１に
示した。Example 1 After oxygen delignification of hardwood, kraft pulp (manufactured by Nippon Paper Industries Co., Ltd.) was mixed with a medium-concentration mixer (manufactured by CRS) at a pulp concentration of 10% by weight, a pH of 3.0, a temperature of 50 ° C. and 3000 rpm. Stirring was performed for 10 seconds under the conditions.
After washing the obtained pulp with water until the pH of the washing solution becomes neutral, beat it with a PFI mill according to JIS P 8221-2,
Pulp with different freeness was prepared. Next, a hand-made paper having a weighing of 60 g / m 2 was prepared from the obtained pulp using a round sheet machine in accordance with JIS P8209. The freeness after beating was measured in accordance with JIS P8121. The thickness of the obtained hand-made sheet is JIS P8118, and the grammage is ISO 536-197.
Each was measured according to 6, the density was calculated, and the results are shown in FIG.
【００２１】［比較例１］実施例１で使用したパルプを
酸性下で撹拌処理を行わなかった以外は、実施例１と同
様にして、手抄き紙を調製し、結果を図１に示した。Comparative Example 1 Hand-made paper was prepared in the same manner as in Example 1 except that the pulp used in Example 1 was not subjected to a stirring treatment under an acidic condition, and the results are shown in FIG. Was.
【００２２】[0022]
【図１】 FIG.
【００２３】［実施例２］パルプとして広葉樹の全晒ク
ラフトパルプ（日本製紙株式会社製）を用いた以外は、
実施例１と同様にして、手抄き紙を調製し、結果を図２
に示した。Example 2 A hardwood bleached kraft pulp (manufactured by Nippon Paper Industries Co., Ltd.) was used as the pulp.
Handmade paper was prepared in the same manner as in Example 1, and the results were shown in FIG.
It was shown to.
【００２４】［比較例２］実施例２で使用したパルプを
酸性下で撹拌処理を行わなかった以外は、実施例１と同
様にして、手抄き紙を調製し、結果を図２に示した。Comparative Example 2 Hand-made paper was prepared in the same manner as in Example 1 except that the pulp used in Example 2 was not subjected to a stirring treatment under an acidic condition, and the results are shown in FIG. Was.
【００２５】[0025]
【図２】 FIG. 2
【００２６】［実施例３］広葉樹の酸素脱リグニン後ク
ラフトパルプ（日本製紙株式会社製）をＡＭＧミキサー
２台（アールストローム社製）で、パルプ濃度12重量
％、ｐＨ3.0、温度60℃、1800ｒｐｍの条件で3秒間撹拌
処理を行った。次に、このパルプを引き続き二酸化塩
素、酸素と過酸化水素を添加したアルカリ抽出段、二酸
化塩素で順次漂白し全晒パルプを調製した。得られたパ
ルプを実施例１と同様に手抄紙を調製し、結果を図３に
示した。[Example 3] Kraft pulp (manufactured by Nippon Paper Industries Co., Ltd.) after oxygen delignification of hardwood was used with two AMG mixers (manufactured by Ahlstrom), pulp concentration: 12% by weight, pH 3.0, temperature: 60 ° C, Stirring was performed for 3 seconds at 1800 rpm. Next, the pulp was successively bleached with chlorine dioxide, chlorine extraction, and an alkali extraction stage to which oxygen and hydrogen peroxide were added to prepare bleached pulp. Hand-made paper was prepared from the obtained pulp in the same manner as in Example 1, and the results are shown in FIG.
【００２７】［比較例３］パルプを酸性下で撹拌処理を
行わなかった以外は、実施例３と同様にして、手抄き紙
を調製し、結果を図３に示した。Comparative Example 3 Hand-made paper was prepared in the same manner as in Example 3 except that the pulp was not subjected to a stirring treatment under an acidic condition, and the results are shown in FIG.
【００２８】[0028]
【図３】 図１〜図３に示したように、パルプを酸性下で撹拌処理
することにより、同一ろ水度で比較した時、嵩高な紙が
得られるのは明白である。FIG. 3 As shown in FIGS. 1 to 3, it is apparent that a bulky paper can be obtained when the pulp is subjected to a stirring treatment under acidic conditions when compared at the same freeness.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮西 孝則 東京都北区王子５丁目21番１号 日本製紙 株式会社技術研究所内 Ｆターム(参考） 4L055 AA03 AC06 BA40 BB30 EA03 EA20 EA26 EA31 FA16 GA08 GA15 GA50 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Takanori Miyanishi 5-21-1, Oji, Kita-ku, Tokyo Nippon Paper Industries Co., Ltd. F-term (reference) 4L055 AA03 AC06 BA40 BB30 EA03 EA20 EA26 EA31 FA16 GA08 GA15 GA50
Claims (2)
ることにより嵩高パルプを製造する方法。1. A method for producing bulky pulp by subjecting pulp to stirring treatment at 70 ° C. or lower under acidic conditions.
重量％、温度が30〜70℃、撹拌機のローターの周速が5
ｍ／秒以上200ｍ／秒、若しくはローターの回転数が100
0ｒｐｍ〜3000ｒｐｍの条件で撹拌処理することにより
嵩高パルプを製造する方法。2. A pulp having a pH of 2 to 4 and a pulp concentration of 6 to 14.
Weight%, temperature 30 ~ 70 ℃, peripheral speed of the rotor of the stirrer is 5
200m / s or more, or 200m / s, or 100 rpm
A method for producing a bulky pulp by stirring under a condition of 0 rpm to 3000 rpm.
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| JP2001100473A JP4599742B2 (en) | 2001-03-30 | 2001-03-30 | Method for producing bulky pulp |
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| JP2002294582A true JP2002294582A (en) | 2002-10-09 |
| JP4599742B2 JP4599742B2 (en) | 2010-12-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010222536A (en) * | 2009-03-25 | 2010-10-07 | Mitsubishi Chemicals Corp | Method for producing cellulose and polymer cellulose composite |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03504030A (en) * | 1988-04-28 | 1991-09-05 | ポトラッチ・コーポレーション | Pulp processing method |
| JPH0523262A (en) * | 1991-07-25 | 1993-02-02 | Oji Paper Co Ltd | Softened pulp and tissue paper made from softened pulp |
| JPH0598597A (en) * | 1991-10-03 | 1993-04-20 | Oji Paper Co Ltd | Tissue paper |
| JPH0614848A (en) * | 1992-07-01 | 1994-01-25 | New Oji Paper Co Ltd | Tissue paper |
| JPH0813381A (en) * | 1994-06-27 | 1996-01-16 | Nippon Paper Ind Co Ltd | Softened paper, laminated paper and their production |
| JP2001049592A (en) * | 1999-08-03 | 2001-02-20 | Ryoji Takahashi | Production of bulky pulp |
-
2001
- 2001-03-30 JP JP2001100473A patent/JP4599742B2/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03504030A (en) * | 1988-04-28 | 1991-09-05 | ポトラッチ・コーポレーション | Pulp processing method |
| JPH0523262A (en) * | 1991-07-25 | 1993-02-02 | Oji Paper Co Ltd | Softened pulp and tissue paper made from softened pulp |
| JPH0598597A (en) * | 1991-10-03 | 1993-04-20 | Oji Paper Co Ltd | Tissue paper |
| JPH0614848A (en) * | 1992-07-01 | 1994-01-25 | New Oji Paper Co Ltd | Tissue paper |
| JPH0813381A (en) * | 1994-06-27 | 1996-01-16 | Nippon Paper Ind Co Ltd | Softened paper, laminated paper and their production |
| JP2001049592A (en) * | 1999-08-03 | 2001-02-20 | Ryoji Takahashi | Production of bulky pulp |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010222536A (en) * | 2009-03-25 | 2010-10-07 | Mitsubishi Chemicals Corp | Method for producing cellulose and polymer cellulose composite |
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|---|---|
| JP4599742B2 (en) | 2010-12-15 |
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