JP5066049B2 - 多層抄き板紙 - Google Patents
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- JP5066049B2 JP5066049B2 JP2008259406A JP2008259406A JP5066049B2 JP 5066049 B2 JP5066049 B2 JP 5066049B2 JP 2008259406 A JP2008259406 A JP 2008259406A JP 2008259406 A JP2008259406 A JP 2008259406A JP 5066049 B2 JP5066049 B2 JP 5066049B2
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Description
「遮水性評価方法」
JIS−Z8703に記載の「試験場所の標準状態」に基づき、温度23°C±1°C、湿度50%±2%の条件下において、まず、板紙である各試料の表層が容器内面となるように、4つの側面同士、及び側面と底面とに継目がないように折りたたみ、縦、横、高さが各15cmの容器を作製し、次に、この容器内に200ccの蒸留水を入れて、ポリエチレン製のシートで容器に蓋をし、20時間後に容器内の蒸留水をメスシリンダーに移し、蒸留水の残存量を測定して評価し、この蒸留水の残存量から、発泡板紙の遮水率(%)=[蒸留水の残存量/200cc]を計測する。
<1>表層
広葉樹晒クラフトパルプ(LBKP)70質量%と上白古紙パルプ30質量%とを配合した後に、離解フリーネスを400ccに調整した表層用の原料パルプに、硫酸バンドを0.5質量%、サイズ剤(商品名:R−22、近代化学株式会社製)を固形分換算で0.5質量%、乾燥紙力増強剤(商品名:ハーマイドRB−33、ハリマ化成株式会社製)を固形分換算で0.3質量%添加して表層用の原料スラリーを調製した。
<2>中層(1)(2)[発泡層]
針葉樹晒クラフトパルプ(NBKP)30質量%と、広葉樹晒クラフトパルプ(LBKP)10質量%と、上白古紙パルプ(LBKP)60質量%とを配合した後に、離解フリーネスを400ccに調整した中層(1)及び(2)用の原料パルプに、硫酸バンドを0.7質量%、サイズ剤(商品名:R−22、近代化学株式会社製)を固形分換算で0.5質量%、乾燥紙力増強剤(商品名:ハーマイドRB−33、ハリマ化成株式会社製)を固形分換算で0.7質量%、熱溶融性繊維(クラレ社製ソフィットN720)を5質量%添加し、中層(1)(2)用の原料スラリーを調製した。その後、また、中層(1)(2)用の原料パルプには、発泡粒子(商品名:マツモトマイクロスフェアー F−48、松本油脂製薬株式会社製)のスラリー液に、カチオン性高分子化合物(商品名:ハーマイドRB−33、ハリマ化成株式会社製)と無機系カチオン性化合物(硫酸バンド、多木化学株式会社製)を予め混合して、発泡粒子を凝集させ粘度190cpsの発泡粒子懸濁液を作製し、発泡粒子をパルプの固形分に対して6.0質量%、カチオン性高分子化合物をパルプの固形分に対して0.4質量%、無機系カチオン性化合物をパルプの固形分に対して0.2質量%となるように前記発泡粒子懸濁液を添加し、中層用のスラリーを調製した。
段ボール古紙パルプ70質量%と地券古紙パルプ30質量%とを配合した後に、離解フリーネスを300ccに調整した裏層用の原料パルプに、硫酸バンドを0.5質量%、サイズ剤(商品名:R−22、近代化学株式会社製)を固形分換算で0.5質量%、乾燥紙力増強剤(商品名:ハーマイドRB−33、ハリマ化成株式会社製)を固形分換算で0.4質量%添加して裏層用の原料スラリーを調製した。
「発泡層の合計坪量(g/m2)」とは、下記の手順に従い各試料の層剥離を行い、JIS−P8142に記載の「紙及び板紙―坪量測定方法」に準拠して測定した発泡層である中層(1)、または中層(1)及び(2)の合計坪量の値である。
(評価基準)
◎:ろ紙上に発泡粒子が微量残存している。
○:ろ紙上に発泡粒子が少量残存している。
×:ろ紙上に発泡粒子が多量に残存している。
11 表層
12,13 中層
14,15 裏層
Claims (5)
- 少なくとも、表層、単層又は複数層から成る中層、裏層から成る多層抄き板紙において、固形分換算で0.1〜2.0質量%、分子量100万〜1200万のカチオン性高分子化合物又は固形分換算で0.01〜0.5質量%の無機系カチオン性化合物の中から選択される2種以上のカチオン性物質と発泡粒子とを、水、前記発泡粒子、前記カチオン性高分子化合物、前記無機系カチオン性化合物の順で、又は、水、前記発泡粒子、前記無機系カチオン性化合物、前記カチオン性高分子化合物の順で混合し、形成させた発泡粒子凝集体を含有する発泡粒子懸濁液を前記表層、中層、裏層のうち少なくとも1層に、パルプ固形分に対して、固形分換算で1〜15%添加し、該層を発泡層として有し、前記発泡層を発泡させることにより、平均面積が25mmm2〜400mm2、個数がA4サイズ当り150個〜2400個のフロック状の模様を有することを特徴とする多層抄き板紙。
- 前記多層抄き板紙は、J.TAPPI No.18−2で規定する層間強度が88mJ以上であることを特徴とする請求項1に記載の多層抄き板紙。
- 前記発泡層は、前記多層抄き板紙の中層であることを特徴とする請求項1又は2に記載の多層抄き板紙。
- 前記多層抄き板紙の熱伝導率が0.05w/mk以下であることを特徴とする請求項1〜3のいずれかに記載の多層抄き板紙。
- 前記多層抄き板紙は、下記「遮水性評価方法」により測定した遮水率が81%以上であることを特徴とする請求項1〜4のいずれかに記載の多層抄き板紙。
「遮水性評価方法」
JIS−Z8703に記載の「試験場所の標準状態」に基づき、温度23°C±1°C、湿度50%±2%の条件下において、まず、板紙である各試料の表層が容器内面となるように、4つの側面同士、及び側面と底面とに継目がないように折りたたみ、縦、横、高さが各15cmの容器を作製し、次に、この容器内に200ccの蒸留水を入れて、ポリエチレン製のシートで容器に蓋をし、20時間後に容器内の蒸留水をメスシリンダーに移し、蒸留水の残存量を測定して評価し、この蒸留水の残存量から、発泡板紙の遮水率(%)=[蒸留水の残存量/200cc]を計測する。
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US8426031B2 (en) * | 2011-09-21 | 2013-04-23 | Kimberly-Clark Worldwide, Inc. | Soft tissue product comprising cotton |
JP6035101B2 (ja) * | 2012-09-28 | 2016-11-30 | 大王製紙株式会社 | 板紙及びその製造方法。 |
WO2016032450A1 (en) * | 2014-08-27 | 2016-03-03 | Kimberly-Clark Worldwide, Inc. | Durable wet-pressed tissue |
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JPH0694640B2 (ja) * | 1983-09-07 | 1994-11-24 | リンテック株式会社 | 発泡フロックを有する模様紙の製造方法 |
JP2000336597A (ja) * | 1999-06-01 | 2000-12-05 | Oji Paper Co Ltd | 模様入り段ボール用ライナー原紙および模様入り段ボール |
JP2003119692A (ja) * | 2001-10-16 | 2003-04-23 | Oji Paper Co Ltd | 填料内添紙およびその製造方法 |
JP2008031601A (ja) * | 2006-07-31 | 2008-02-14 | Daio Paper Corp | 多層抄き板紙 |
JP4616228B2 (ja) * | 2006-09-29 | 2011-01-19 | 大王製紙株式会社 | 多層抄き板紙 |
JP2008144347A (ja) * | 2008-01-07 | 2008-06-26 | Oji Paper Co Ltd | 填料内添紙およびその製造方法 |
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