JP2010077573A - オフセット印刷用新聞用紙 - Google Patents
オフセット印刷用新聞用紙 Download PDFInfo
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- JP2010077573A JP2010077573A JP2008250022A JP2008250022A JP2010077573A JP 2010077573 A JP2010077573 A JP 2010077573A JP 2008250022 A JP2008250022 A JP 2008250022A JP 2008250022 A JP2008250022 A JP 2008250022A JP 2010077573 A JP2010077573 A JP 2010077573A
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Abstract
【解決手段】原紙が中性抄紙法で抄造され、該原紙の表裏面に表面処理剤が塗工された新聞用紙であって、前記原紙が古紙パルプを主成分とし、前記表面処理剤が、少なくとも(A)表面サイズ剤、(B)紙力増強剤、及び(C)導電剤を含有することを特徴とする、オフセット印刷用新聞用紙。
【選択図】なし
Description
原紙が中性抄紙法で抄造され、該原紙の表裏面に表面処理剤が塗工された新聞用紙であって、
前記原紙が、古紙パルプを主成分とし、
前記表面処理剤が、少なくとも
(A)表面サイズ剤、
(B)紙力増強剤、及び
(C)導電剤
を含有することを特徴とする、オフセット印刷用新聞用紙
に関する。
本発明のオフセット印刷用新聞用紙は、中性抄紙法で抄造された原紙の表裏面に表面処理剤が塗工されたものであり、原紙は古紙パルプを主成分とし、好適には100質量%の古紙パルプで構成され、表面処理剤には、後に詳述する特定の3成分が少なくとも含有されている。
Ca(OH)2+CO2→CaCO3+H2O
Na2CO3+CaO+H2O→CaCO3+2NaOH
以下に示す(A)表面サイズ剤と(B)紙力増強剤と(C)導電剤とを、表1に示す割合(固形分質量比)で、均一な組成となるように室温にて混合攪拌し、表面処理剤を得た。
スチレン系ポリマー:カチオン性
(商品名:バソプラスト8838、BASF(株)製)
アクリル系ポリマー:カチオン性
(商品名:バソプラスト250D、BASF(株)製)
アルキルケテンダイマー(AKD):カチオン性
(商品名:SE2360、星光PMC(株)製)
・酸化澱粉
酸化澱粉A:(ダイオーペーパーケミカル(株)製、重量平均分子量:30万)
酸化澱粉B:(ダイオーペーパーケミカル(株)製、重量平均分子量:50万)
酸化澱粉C:(ダイオーペーパーケミカル(株)製、重量平均分子量:60万)
酸化澱粉D:(ダイオーペーパーケミカル(株)製、重量平均分子量:70万)
酸化澱粉E:(ダイオーペーパーケミカル(株)製、重量平均分子量:80万)
酸化澱粉F:(商品名:SK−20、日本コーンスターチ(株)製、
重量平均分子量:64万)
酸化澱粉G:(商品名:MS3800、日本食品加工社製、
重量平均分子量:49万)
・ヒドロキシエチル化澱粉
エチル化澱粉A:(商品名:PG−270、ペンフォードガム社製、
重量平均分子量:100万)
エチル化澱粉B:(商品名:ETHYLE−2025、ステーレ社製、
重量平均分子量:54万)
・ポリアクリルアミド樹脂
PAM:(商品名:DS4344、星光PMC(株)製)
・塩化ナトリウム(商品名:並塩、(株)日本海水製)
脱墨古紙パルプ(離解・脱墨古紙パルプ)100質量%のパルプ成分に、表3に示す紙中灰分となるように、表2に示す填料を添加してパルプスラリーを得た。
填料1:毬栗炭酸カルシウム
(吸油量:180ml/100g、BET比表面積:25m2/g、
体積平均粒子径:5μm)
填料2:軽質炭酸カルシウム(商品名:タマパール121、奥多摩工業(株)製)
填料3:水和珪酸(エリエールケミカル(株)製、体積平均粒子径:5μm、
乾燥処理なし)
モール法は沈殿滴定の一種である。クロム酸カリウム溶液を指示薬とし、塩化ナトリウムを含む試料溶液に硝酸銀溶液を滴下する。滴下された硝酸銀は、(1−1)式のように、塩化ナトリウムの塩素イオンと反応して塩化銀の白色沈殿を生じる。しかし塩素イオンが消費されてなくなると、硝酸銀は指示薬のクロム酸カリウムと反応し、(1−2)式のように、クロム酸銀の赤褐色沈殿を生じる。終点は溶液が赤味を帯びた時点とする。
NaCl+AgNO3→NaNO3+AgCl↓(白色) (1−1)
2AgNO3+K2CrO4→2KNO3+Ag2CrO4↓(赤褐色) (1−2)
クロム酸銀の赤褐色沈殿を認識できる程度に生成させるには、当量点からさらに若干の硝酸銀が必要である。そのため、ブランク試験を行って滴定値を補正する必要がある。
JIS P 8124に準拠して測定した。
JIS P 8118に準拠して測定した。
JIS P 8251に準拠して測定した。
JIS P 8147に準拠し、オフセット印刷用新聞用紙表面(紙の流れ方向)と金属表面(表面粗さRaが0.4以下のステンレス鋼板表面)との平均動摩擦力を測定した。
JIS P 8111に準拠した温度23±1℃及び相対湿度50±2%の標準状態下で、JIS K 6911に準拠して、表面電気抵抗(表面、裏面)を測定した。
JIS P 8143「紙の自重曲げ法によるこわさ試験方法(クラーク法)」に記載の方法に準拠して、縦方向の剛度(クラーク剛度)を測定した。
JAPAN TAPPI No.5−1「紙及び板紙−平滑度及び透気度試験方法−第1部:スムースター法」に記載の方法に準拠して測定した。
自動仕立て機((株)金田機械製作所製、PPR1型)で巻き取りを50本仕立てた時の、ジャミングによる失敗本数の割合をジャミング率とした。
JIS K 5701−1に記載の「平版インキ−第1部:試験方法」に準拠し、転色試験機(型番:RI−1型、石川島産業機械(株)製)を使用し、インキタック18の1回刷りの条件で印刷した。新聞用紙表面の取られを目視にて観察し、以下の評価基準に基づいて評価した。
(評価基準)
◎:新聞用紙表面全体に全く取られがない。
○:新聞用紙表面の一部に僅かに取られが生じているが、実用上問題がない。
△:新聞用紙表面全体に取られが認められる。
×:新聞用紙表面全体に取られが著しい。
なお、前記評価基準のうち、◎及び○の場合を実使用可能と判断する。
Claims (5)
- 原紙が中性抄紙法で抄造され、該原紙の表裏面に表面処理剤が塗工された新聞用紙であって、
前記原紙が、古紙パルプを主成分とし、
前記表面処理剤が、少なくとも
(A)表面サイズ剤、
(B)紙力増強剤、及び
(C)導電剤
を含有することを特徴とする、オフセット印刷用新聞用紙。 - 表面処理剤における(A)表面サイズ剤と(B)紙力増強剤と(C)導電剤との割合が、固形分質量比で、(A):(B):(C)=5:100:3〜20:100:17である、請求項1に記載のオフセット印刷用新聞用紙。
- (B)紙力増強剤が酸化澱粉であり、該酸化澱粉の重量平均分子量が50万〜80万である、請求項1又は2に記載のオフセット印刷用新聞用紙。
- JIS P 8251に準拠して測定した紙中灰分が5〜20質量%である、請求項1、2又は3に記載のオフセット印刷用新聞用紙。
- JIS P 8147に準拠して測定したオフセット印刷用新聞用紙表面(紙の流れ方向)と金属表面との平均動摩擦力が1.50〜3.00mNであり、JIS P 8111に準拠した温度23±1℃及び相対湿度50±2%の標準状態での、JIS K 6911に準拠して測定した表面電気抵抗が1×108〜1×1011Ω/sqである、請求項1〜4のいずれか1つに記載のオフセット印刷用新聞用紙。
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Cited By (3)
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JP2016047978A (ja) * | 2014-08-28 | 2016-04-07 | デュプロ精工株式会社 | 再生紙の加湿処理装置 |
JP6026619B1 (ja) * | 2015-10-22 | 2016-11-16 | 株式会社Mizkan Holdings | 風味の改善作用を有する米飯改良剤 |
WO2021029351A1 (ja) * | 2019-08-15 | 2021-02-18 | 日本製紙株式会社 | 軽質炭酸カルシウムを内添した紙 |
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CN104532654B (zh) * | 2014-12-15 | 2016-08-24 | 山东太阳纸业股份有限公司 | 一种提高箱板纸页平滑度的方法 |
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JP6026619B1 (ja) * | 2015-10-22 | 2016-11-16 | 株式会社Mizkan Holdings | 風味の改善作用を有する米飯改良剤 |
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