JPH049236B2 - - Google Patents
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- Publication number
- JPH049236B2 JPH049236B2 JP62203883A JP20388387A JPH049236B2 JP H049236 B2 JPH049236 B2 JP H049236B2 JP 62203883 A JP62203883 A JP 62203883A JP 20388387 A JP20388387 A JP 20388387A JP H049236 B2 JPH049236 B2 JP H049236B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- paper
- kaolin
- pigment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000049 pigment Substances 0.000 claims description 34
- 239000002245 particle Substances 0.000 claims description 23
- 238000010521 absorption reaction Methods 0.000 claims description 16
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 13
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 13
- 239000008199 coating composition Substances 0.000 claims description 4
- 239000005995 Aluminium silicate Substances 0.000 description 33
- 235000012211 aluminium silicate Nutrition 0.000 description 33
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 33
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 239000003973 paint Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- 238000013441 quality evaluation Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 239000004927 clay Substances 0.000 description 5
- 239000002270 dispersing agent Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000002518 antifoaming agent Substances 0.000 description 4
- 239000004816 latex Substances 0.000 description 4
- 229920000126 latex Polymers 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 235000011121 sodium hydroxide Nutrition 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 229920002472 Starch Polymers 0.000 description 3
- 229920001807 Urea-formaldehyde Polymers 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 239000008107 starch Substances 0.000 description 3
- 235000019698 starch Nutrition 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000007127 saponification reaction Methods 0.000 description 2
- -1 sericite Chemical compound 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- 108010073771 Soybean Proteins Proteins 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 239000005018 casein Substances 0.000 description 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 1
- 235000021240 caseins Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007850 fluorescent dye Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 229940001941 soy protein Drugs 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Paper (AREA)
Description
（産業上の利用分野）
本発明は、印刷用軽量塗工紙に関するものであ
る。
（従来の技術）
商業（チラシ、カタログ等）印刷、出版印刷の
ビジユアル化指向に対応して印刷紙の印刷光沢、
インキセツト、インキ着肉性、インキ発色性等の
印刷適性の改良を図るため、洋紙を基紙として、
微細顔料と接着剤とを主成分とする塗被組成物
（以下塗料という）を塗工し複合シートとするこ
とが、近年非常に盛んになつている。その場合、
塗工量は両面で15ｇ／m2以上塗工するのが一般的
である。一方、輸送コストの低減、省資源等の点
から印刷紙の軽量化に対する要請は非常に強いも
のがある。塗工紙についても例外ではなく、基紙
の米坪減、塗料の塗工量減ないしはこれらの併用
で対処している。
しかしながら、基紙の米坪減は、紙力の低下に
つながり、紙抄造時更に印刷時に断紙し易すくな
り、作業性が悪化する。又、原料配合を変えなけ
れば白紙および印刷不透明度（所謂ストライクス
ルー）の低下を招き、これを維持するには内添填
料の増添、内添填料および／又はパルプ種類の変
更が必要となり、これらは往々にして大幅なコス
トアツプ、更には紙力の低下を招く。従つて、基
紙の米坪減によつて対処することは困難であつ
た。
一方、塗工量を減少し、特に両面で10ｇ／m2以
下にすると印刷適性の悪化、白紙および印刷不透
明度の低下を招く。このため、印刷適性、特に印
刷光沢の低下防止のため粒径の小さい輸入クレ
ー、プラスチツクピグメント等の顔料、ワツクス
エマルジヨン、ステアリン酸カルシウム等の潤滑
剤が配合されたり、白紙および印刷不透明度の低
下防止のため、二酸化チタンのような高屈折率の
顔料が配合されてきた。
しかしながら、小粒径顔料の配合によつては印
刷光沢は、余り大きな改善が見られず、又高屈折
率顔料の配合によつては、白紙不透明度の改善は
かなり認められるが、印刷不透明度の改善が余り
見られない等が問題となつていた。このため、未
だ、塗工量が両面で10ｇ／m2以下、特に５ｇ／m2
以下で印刷適性、白紙および印刷不透明度の優れ
た軽量塗工紙が製造されているのが現状である。
（発明の目的）
本発明は、軽量かつ印刷特性及び白紙および印
刷不透明度をバランスよく備える優れた印刷用軽
量塗工紙を提供することを目的とする。
本発明者らは、紙塗料用顔料として粒径の大き
い顔料と、高屈折率顔料ではなく、吸油量の高い
顔料と、装着剤としてポリビニルアルコールとを
含む塗料を塗工することにより、塗工量が両面で
７ｇ／m2以下、特に３〜５ｇ／m2でも印刷適性
（印刷光沢、インキセツト）、白紙および印刷不透
明度の優れた軽量塗工紙が出来るということを見
出し、本発明を完成するに至つたものである。
（本発明の構成）
本発明は、平均粒径1.0〜3.5μであつて1μパス
10〜50％の特性を有する顔料30〜70重量部と、吸
油量50ml／100ｇ以上の顔料70〜30重量部とから
なる顔料100重量部に対し、ポリビニルアルコー
ル（以下、PVAと略す。）３〜20重量部を含む塗
被組成物を、片面当たり乾燥重量で１〜3.5ｇ／
m2となるよう基紙の片面又は両面に塗工したこと
を特徴とする印刷用軽量塗工紙に関するものであ
る。
以下、本発明について詳述する。
本発明で使用する粒径の大きな顔料とは平均粒
径が1.0〜3.5μで、1μパス（1μのふるいを通過し
た重量％）が10〜50％の顔料をいう。平均粒径が
1.0μ未満ないし1μパスが50％以上の小さい粒径の
顔料は、印刷光沢、インキ着肉性が悪い。一方、
平均粒径が3.5μより大きく、1μパスが10％未満の
より大きな顔料も、印刷光沢、インキセツトが悪
くなり不適当である。
この粒径を有する顔料としては、例えば、カオ
リン、セリサイト、カオリン／セリサイト混合
物、炭酸カルシウム、水酸化アルミニウム、タル
ク、等があり、これらは単独、あるいは混合して
使用することもできる。
このような粒径を有する顔料の調整法は公知で
ある。
本発明に使用する吸油量の大きな顔料は、50
ml／100ｇ以上の吸油量を有する。50ml／100ｇよ
り小さくなると白紙および印刷不透明度、インキ
セツトが悪くなり不適当である。このような吸油
量を有する顔料としては、例えばカオリン、焼成
クレー、ホワイトカーボン、活性白土、UF（尿素
樹脂）フイラー等があり、これらは単独、あるい
は、混合して使用することができる。
このような吸油量の調整法も公知である。
本発明に使用する顔料の配合は、顔料100重量
部中、平均粒径1.0〜3.5μであつて1μパス10〜50
％の特性を有する顔料が30〜70重量部、吸油量50
ml／100ｇ以上の顔料が70〜30重量部となるよう
に行う。
平均粒径1.0〜3.5μであつて1μパス10〜50％の
特性を有する顔料の含有量が30重量部未満である
場合（吸油量50ml／100ｇ以上の顔料が70重量部
を越える場合）は、第17頁表−１の比較例５に示
すように、十分な印刷光沢度を得ることができ
ず、またインキ着肉性も悪い。一方、吸油量50
ml／100ｇ以上の顔料が30重量部未満の場合（平
均粒径1.0〜3.5μであつて1μパス10〜50％の特性
を有する顔料の含有量が70重量部を越える場合）
は、第17頁表−１の比較例６に示すように、十分
な白紙不透明度及び印刷不透明度を得ることがで
きず、さらにインキセツトが不良となる。
本発明の組成物に使用するバインダーとしての
ポリビニルアルコールはこれらの顔料100重量部
に対し、３〜20重量部、好ましくは５〜15重量部
の割合で配合する。３重量部未満では、印刷光沢
の低下を生じ、一方25重量部を越えると白紙／印
刷不透明度が低下するからである。
使用するポリビニルアルコールのケン化度につ
いて特に制限はなく、完全ケン化物でも部分ケン
化物でも良い。一般に、70〜99％のケン化度のも
のが使用される。重合度についても特に制限はな
いが、一般に400〜2400のものが使用される。
なお、バインダーとして、ポリビニルアルコー
ルとともに、澱粉、カゼイン、大豆タンパク、ラ
テツクス（SBR系、アクリル系、酢酸ビニル系）
などと併用してもよい。
また、上記の成分の他に保水剤（CMC、アル
ギン酸ソーダ、ポリカルボン酸）顔料分散剤、螢
光染料、消泡剤等も適時併用できる。
基紙としては、特に制限はない、例えば上質
紙、中質紙、等の印刷用紙、グラビア用紙など、
本発明の目的の範囲内で種々のものが使用でき
る。
上記塗工組成物は種々の方法により塗工するこ
とができ、例えばサイズプレス、トランスフアー
ロールコーター等のロールコーター、及びブレー
ドコーター、エアナイフコーター等のコーターを
使用して塗工してもよいが、これに制限されるも
のではない。
塗工量は、片面当たり乾燥重量で約１〜3.5
ｇ／m2、好ましくは２〜3.5ｇ／m2、したがつて
両面では乾燥重量で２〜７ｇ／m2、好ましくは４
〜７ｇ／m2である。２ｇ／m2未満では本発明の効
果が出ず、10ｇ／m2以上では本塗料の優位性が発
揮されない。
（実施例）
以下、実施例によつて、本発明を更に具体的に
説明するが、本発明はこれらの実施例によつて何
ら制限されるものではない。
実施例 １
塗料配合
セリサイト（同和工業製ミクロクリーン）：60重
量部…平均粒径1.3μ、1μパス42％
酸性白土（水沢化学製シルトンLP−75）：20重量
部…吸油量80ml／100ｇ
尿素樹脂（三井東圧製Ｕ−パール）：20重量部…
吸油量250ml／100ｇ
PVA、UF−170（ユニチカ）：20重量部（固形）
SB系ラテツクスＬ−1622（旭化成）：５重量部
（〃）
分散剤アロンＴ−40（東亜合成）：0.3重量部（〃）
苛性ソーダ：0.1重量部（〃）
消泡剤デフオーマー122（サンノプコ）：0.01重量
部
この塗料をテスブレードコーター（塗工速度
600ｍ／min）にて米坪50ｇ／m2の中質紙ワイヤ
ー面に2.5ｇ／m2塗工し、温度105℃の送風乾燥機
で30秒間乾燥した。この塗工紙を１昼夜、温度20
℃湿度65％で調湿し、テストスーパーカレンダー
を使用し、チルドロール温度50℃、速度10ｍ／
min、線圧50Kg／cmの条件で塗工面をチルドロー
ルに当て、２回処理を行い塗工紙を得た。
得られた塗工紙の品質評価を下記表−１に示
す。
実施例 ２
塗料配合
カオリン（E.C.C.製スーパークレー）：25重量部
…平均粒径3.1μ、1μパス22％
水酸化アルミニウム（昭和軽金属製ハイジライト
Ｈ−42）：25重量部…平均粒径1.3μ、1μパス38％
ホワイトカーボン（日本シリカ製ニツプシー
ル）：50重量部…吸油量250ml／100ｇ
PVA、UP−240（ユニチカ）：５重量部（固形）
SB系ラテツクスＬ−1622（旭化成）：10重量部
（〃）
澱粉王子エースＡ（王子ナシヨナル）：５重量部
（〃）
分散剤アロンＴ−40（東亜合成）：0.3重量部（〃）
苛性ソーダ：0.1重量部（〃）
消泡剤デフオーマー122（サンノプコ）：0.01重量
部
この塗料をテストゲートロールコーター（塗工
速度300ｍ／min）で塗工する以外は、実施例１
と同様に処理して得られた。
塗工紙の品質評価を表−１に示す。
実施例 ３
塗料配合
カオリン（ジークライト製Ｂカオリン）：40重量
部…平均粒径1.6μ、1μパス37％
焼成カオリン（アングロアメリカ製アルフアテツ
クス）：60重量部…吸油量55ml／100ｇ
PVA、UF−050（ユニチカ）：15重量部（固形）
分散剤アロンＴ−40（東亜合成）：0.3重量部（〃）
苛性ソーダ：0.1重量部（〃）
消泡剤デフオーマー122（サンノプコ）：0.01重量
部
この塗料を、以下実施例１と同様に処理して得
られた。
塗工紙の品質評価を表−１に示す。
比較例 １
実施例３の塗料を0.5ｇ／m2塗工する以外は、
実施例３と同様に処理する。得られた塗工紙の品
質評価を表−１に示す。
比較例 ２
実施例３の塗料を5.5ｇ／m2塗工する以外は、
実施例３と同様に処理する。得られた塗工紙の品
質評価を表−１に示す。
比較例 ３
塗料配合
カオリン（ジークライト製Ｂカオリン）：40重量
部…平均粒径1.6μ、1μパス37％
焼成カオリン（アングロアメリカ製アルフアテツ
クス）：60重量部…吸油量55ml／100ｇ
PVA、UF−105（ユニチカ）：２重量部（固形）
SB系ラテツクスＬ−1622（旭化成）：10重量部
（〃）
澱粉王子エースＡ（王子ナシヨナル）：７重量部
（〃）
分散剤アロンＴ−40（東亜合成）：0.3重量部（〃）
苛性ソーダ：0.1重量部（〃）
消泡剤デフオーマー122（サンノプコ）：0.01重量
部
この塗料を、実施例３と同様に処理して得られ
た。
塗工紙の品質評価を表−１に示す。
比較例 ４
実施例３のPVA（UF−050）15重量部を、
PVA（UF−050）25重量部に変えた以外は、実施
例３と同様に処理した。得られた塗工紙の品質評
価を表−１に示す。
比較例 ５
実施例３のカオリン（Ｂカオリン）40重量部
を、カオリン（Ｂカオリン）20重量部に変え、焼
成カオリン（アルフアテクス）60重量部を、焼成
カオリン（アルフアテツクス）80重量部に変えた
以外は、実施例３と同様に処理する。
得られた塗工紙の品質評価を表−１に示す。
比較例 ６
実施例３のカオリン（Ｂカオリン）40重量部
を、カオリン（Ｂカオリン）80重量部に変え、焼
成カオリン（アルフアテツクス）60重量部を、焼
成カオリン（アルフアテツクス）20重量部に変え
た以外は、実施例３と同様に処理した。
得られた塗工紙の品質評価を表−１に示す。
比較例 ７
実施例３のカオリン（Ｂカオリン）40重量部
を、本発明で使用するカオリンよりも平均粒径が
小さなカオリンであるウルトラホワイト（UW−
90）（エンゲルハード製平均粒径0.8μ、1μパス67
％）40重量部に変えた以外は、実施例３と同様に
処理した。得られた塗工紙の品質評価を表−１に
示す。
比較例 ８
実施例３のカオリン（Ｂカオリン）40重量部
を、本発明で使用するカオリンよりも平均粒径が
小さなカオリンであるウルトラホワイト（UW−
90）60重量部に、また、焼成カオリン（アルフア
テツクス）60重量部を炭酸カルシウム（ソフトン
2200）（備北粉化製、吸油量20ml／100ｇ）40重量
部に、変えた以外は、実施例３と同様に処理し
た。
得られた塗工紙の品質評価を表−１に示す。
比較例 ９
実施例１において、セリサイトの代りにカオリ
ン（Ｂカオリン）を使用し、酸性白土及び尿素樹
脂の代りに炭酸カルシウム（ソフトン2200）を使
用する以外、実施例１を繰り返し、塗工紙を調整
し、その品質を評価した。その結果を表−１に示
す。
(Industrial Application Field) The present invention relates to lightweight coated paper for printing. (Prior technology) In response to the visual orientation of commercial (flyers, catalogs, etc.) printing and publication printing, the printing gloss of printing paper,
In order to improve printing suitability such as ink set, ink receptivity, and ink color development, we use Western paper as the base paper.
BACKGROUND ART In recent years, coating compositions (hereinafter referred to as paints) containing fine pigments and adhesives as main components to form composite sheets have become very popular. In that case,
The coating amount is generally 15 g/m 2 or more on both sides. On the other hand, there is a strong demand for lighter weight printing paper from the viewpoint of reducing transportation costs and saving resources. Coated paper is no exception, and measures are being taken to reduce the weight of the base paper, reduce the amount of paint applied, or use a combination of these. However, a decrease in the basis weight of the base paper leads to a decrease in paper strength, which makes the paper more likely to break during paper making and printing, resulting in poor workability. In addition, unless the raw material composition is changed, blank paper and printing opacity (so-called strike-through) will decrease, and to maintain this, it is necessary to increase the internal filler, change the internal filler and/or the type of pulp, These often lead to a significant increase in cost and further a decrease in paper strength. Therefore, it was difficult to deal with the reduction in basis paper weight. On the other hand, if the coating amount is reduced, particularly to 10 g/m 2 or less on both sides, printability deteriorates, and blank paper and printing opacity decrease. For this reason, in order to prevent a decrease in printability, especially in printing gloss, pigments such as imported clay and plastic pigments with small particle diameters, wax emulsions, and lubricants such as calcium stearate are blended, and in order to prevent a decrease in printing opacity and white paper. To prevent this, high refractive index pigments such as titanium dioxide have been incorporated. However, when small particle size pigments are mixed, printing gloss does not improve much, and when high refractive index pigments are mixed, white paper opacity is considerably improved, but printing opacity The problem was that there was not much improvement seen. For this reason, the coating amount on both sides is still less than 10g/ m2 , especially 5g/ m2.
At present, lightweight coated papers with excellent printability, white paper, and printing opacity are manufactured using the following methods. (Objective of the Invention) An object of the present invention is to provide an excellent lightweight coated paper for printing that is lightweight and has a well-balanced printing property, blankness, and printing opacity. The present inventors have developed a method for coating paper by applying a paint containing a pigment with a large particle size as a pigment for paper paint, a pigment with a high oil absorption amount instead of a high refractive index pigment, and polyvinyl alcohol as a wearable agent. It was discovered that lightweight coated paper with excellent printability (printing gloss, ink set), blank paper, and printing opacity can be produced even when the amount is 7 g/m 2 or less , especially 3 to 5 g/m 2 on both sides, and the present invention was completed. This is what I came to do. (Structure of the present invention) The present invention has an average particle size of 1.0 to 3.5μ and a 1μ pass.
100 parts by weight of a pigment consisting of 30 to 70 parts by weight of a pigment with properties of 10 to 50% and 70 to 30 parts by weight of a pigment with an oil absorption of 50 ml/100 g or more, 3 parts by weight of polyvinyl alcohol (hereinafter abbreviated as PVA). 1 to 3.5 g dry weight per side of a coating composition containing ~20 parts by weight.
This invention relates to a lightweight coated paper for printing, characterized in that it is coated on one or both sides of a base paper so as to have a thickness of m2 . The present invention will be explained in detail below. The pigment with a large particle size used in the present invention refers to a pigment with an average particle size of 1.0 to 3.5μ and a 1μ pass (% by weight that passes through a 1μ sieve) of 10 to 50%. The average particle size is
Pigments with small particle diameters of less than 1.0μ to 1μ pass of 50% or more have poor printing gloss and ink receptivity. on the other hand,
Larger pigments with an average particle size greater than 3.5 microns and a 1 micron pass of less than 10% are also unsuitable, as they result in poor print gloss and ink set. Examples of pigments having this particle size include kaolin, sericite, kaolin/sericite mixture, calcium carbonate, aluminum hydroxide, talc, and the like, and these can be used alone or in combination. Methods for preparing pigments having such particle sizes are known. The pigment with high oil absorption used in the present invention is 50
It has an oil absorption amount of ml/100g or more. If it is smaller than 50ml/100g, the blank paper, printing opacity, and ink set will be poor, making it unsuitable. Examples of pigments having such oil absorption include kaolin, calcined clay, white carbon, activated clay, and UF (urea resin) filler, which can be used alone or in combination. Such a method for adjusting oil absorption is also known. The composition of the pigment used in the present invention is such that the average particle size is 1.0 to 3.5μ in 100 parts by weight of the pigment, and 1μ pass is 10 to 50.
Pigment with the characteristics of 30-70 parts by weight, oil absorption 50
This is done so that the amount of pigment of ml/100g or more is 70 to 30 parts by weight. If the content of a pigment with an average particle size of 1.0 to 3.5μ and a 1μ pass of 10 to 50% is less than 30 parts by weight (if the pigment with an oil absorption of 50ml/100g or more exceeds 70 parts by weight), As shown in Comparative Example 5 in Table 1 on page 17, it was not possible to obtain sufficient printing gloss and the ink receptivity was also poor. On the other hand, oil absorption amount is 50
When the pigment of ml/100g or more is less than 30 parts by weight (when the content of pigment with an average particle size of 1.0 to 3.5μ and a 1μ pass of 10 to 50% is more than 70 parts by weight)
As shown in Comparative Example 6 in Table 1 on page 17, sufficient blank paper opacity and printing opacity could not be obtained, and furthermore, the ink set was defective. Polyvinyl alcohol as a binder used in the composition of the present invention is blended in an amount of 3 to 20 parts by weight, preferably 5 to 15 parts by weight, per 100 parts by weight of these pigments. This is because if it is less than 3 parts by weight, the print gloss will be reduced, while if it exceeds 25 parts by weight, the white paper/print opacity will be reduced. There is no particular restriction on the degree of saponification of the polyvinyl alcohol used, and it may be completely saponified or partially saponified. Generally, a saponification degree of 70 to 99% is used. There are no particular restrictions on the degree of polymerization, but a degree of polymerization of 400 to 2,400 is generally used. In addition, as a binder, in addition to polyvinyl alcohol, starch, casein, soy protein, and latex (SBR-based, acrylic-based, vinyl acetate-based) are used.
It may be used in combination with In addition to the above-mentioned components, water retention agents (CMC, sodium alginate, polycarboxylic acid), pigment dispersants, fluorescent dyes, antifoaming agents, etc. can be used in combination as appropriate. There are no particular restrictions on the base paper, such as printing paper such as high-quality paper or medium-quality paper, gravure paper, etc.
A variety of materials can be used within the scope of the present invention. The above coating composition can be applied by various methods, for example, it may be applied using a roll coater such as a size press or a transfer roll coater, or a coater such as a blade coater or an air knife coater. , but is not limited to this. Coating amount is approximately 1 to 3.5 dry weight per side.
g/m 2 , preferably 2 to 3.5 g/m 2 , thus 2 to 7 g/m 2 in dry weight on both sides, preferably 4
~7g/ m2 . If the amount is less than 2 g/m 2 , the effect of the present invention will not be achieved, and if it is 10 g/m 2 or more, the superiority of the present coating material will not be exhibited. (Examples) Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to these Examples in any way. Example 1 Paint blended sericite (Microclean manufactured by Dowa Kogyo): 60 parts by weight...Average particle size 1.3μ, 1μ pass 42% Acid clay (Silton LP-75 manufactured by Mizusawa Chemical): 20 parts by weight…Oil absorption 80ml/100g Urea resin (Mitsui Toatsu U-Pearl): 20 parts by weight...
Oil absorption 250ml/100g PVA, UF-170 (Unitika): 20 parts by weight (solid) SB latex L-1622 (Asahi Kasei): 5 parts by weight (〃) Dispersant Aron T-40 (Toagosei): 0.3 parts by weight (〃) Caustic soda: 0.1 part by weight (〃) Antifoaming agent Defoamer 122 (San Nopco): 0.01 part by weight This paint was coated with a Tesblade coater (coating speed
2.5 g/m 2 was coated on the medium paper wire surface of 50 g/m 2 at a speed of 600 m/min) and dried for 30 seconds in a blow dryer at a temperature of 105°C. This coated paper was kept at a temperature of 20°C for one day and night.
Conditioned at 65% humidity, using a test super calendar, chilled roll temperature 50°C, speed 10m/
The coated surface was applied to a chill roll at a linear pressure of 50 Kg/cm and treated twice to obtain coated paper. The quality evaluation of the obtained coated paper is shown in Table 1 below. Example 2 Paint blended kaolin (ECC Super Clay): 25 parts by weight...average particle size 3.1μ, 1μ pass 22% Aluminum hydroxide (Showa Light Metal Hygilite H-42): 25 parts by weight...average particle size 1.3μ , 1μ pass 38% White carbon (Nipseal made by Nippon Silica): 50 parts by weight...Oil absorption 250ml/100g PVA, UP-240 (Unitika): 5 parts by weight (solid) SB latex L-1622 (Asahi Kasei): 10 parts by weight Parts (〃) Starch Oji Ace A (Oji National): 5 parts by weight (〃) Dispersant Aron T-40 (Toagosei): 0.3 parts by weight (〃) Caustic soda: 0.1 parts by weight (〃) Antifoaming agent Deformer 122 ( Example 1 except that this paint was applied with a test gate roll coater (coating speed 300 m/min): 0.01 part by weight
It was obtained by the same treatment. Table 1 shows the quality evaluation of coated paper. Example 3 Paint-blended kaolin (B kaolin manufactured by Sieglite): 40 parts by weight...Average particle size 1.6μ, 1μ pass 37% Calcined kaolin (Alphatex manufactured by Anglo America): 60 parts by weight...Oil absorption 55ml/100g PVA, UF-050 (Unitika): 15 parts by weight (solid) Dispersant Aron T-40 (Toagosei): 0.3 parts by weight (〃) Caustic soda: 0.1 parts by weight (〃) Antifoaming agent Deformer 122 (San Nopco): 0.01 parts by weight This paint was treated in the same manner as in Example 1 below. Table 1 shows the quality evaluation of coated paper. Comparative Example 1 Except for applying the paint of Example 3 at 0.5 g/ m2 ,
The same process as in Example 3 is carried out. Table 1 shows the quality evaluation of the obtained coated paper. Comparative Example 2 Except for applying the paint of Example 3 at 5.5g/ m2 ,
The same process as in Example 3 is carried out. Table 1 shows the quality evaluation of the obtained coated paper. Comparative Example 3 Paint-blended kaolin (B kaolin made by Sieglite): 40 parts by weight...Average particle size 1.6μ, 1μ pass 37% Calcined kaolin (Alphatecs made by Anglo America): 60 parts by weight...Oil absorption 55ml/100g PVA, UF-105 (Unitika): 2 parts by weight (solid) SB latex L-1622 (Asahi Kasei): 10 parts by weight (〃) Starch Oji Ace A (Oji National): 7 parts by weight (〃) Dispersant Aron T-40 (Toagosei): 0.3 parts by weight (〃) Caustic soda: 0.1 parts by weight (〃) Antifoamer Defomer 122 (San Nopco): 0.01 parts by weight This paint was treated in the same manner as in Example 3 to obtain. Table 1 shows the quality evaluation of coated paper. Comparative Example 4 15 parts by weight of PVA (UF-050) of Example 3,
The treatment was carried out in the same manner as in Example 3, except that the amount of PVA (UF-050) was changed to 25 parts by weight. Table 1 shows the quality evaluation of the obtained coated paper. Comparative Example 5 40 parts by weight of kaolin (B kaolin) in Example 3 was changed to 20 parts by weight of kaolin (B kaolin), and 60 parts by weight of calcined kaolin (Alphatex) was changed to 80 parts by weight of calcined kaolin (Alphatex). The process is carried out in the same manner as in Example 3 except for the changes. Table 1 shows the quality evaluation of the obtained coated paper. Comparative Example 6 40 parts by weight of kaolin (B kaolin) in Example 3 was changed to 80 parts by weight of kaolin (B kaolin), and 60 parts by weight of calcined kaolin (Alphatex) was replaced with 20 parts by weight of calcined kaolin (Alphatex). The process was carried out in the same manner as in Example 3, except that . Table 1 shows the quality evaluation of the obtained coated paper. Comparative Example 7 40 parts by weight of the kaolin (B kaolin) of Example 3 was mixed with Ultra White (UW-1), which is a kaolin with a smaller average particle size than the kaolin used in the present invention.
90) (Engelhard average particle size 0.8μ, 1μ pass 67
%) The treatment was carried out in the same manner as in Example 3, except that the amount was changed to 40 parts by weight. Table 1 shows the quality evaluation of the obtained coated paper. Comparative Example 8 40 parts by weight of the kaolin (B kaolin) of Example 3 was mixed with Ultra White (UW-1), which is a kaolin with a smaller average particle size than the kaolin used in the present invention.
90) Add 60 parts by weight of calcined kaolin (Alphaatex) to 60 parts by weight of calcium carbonate (Softon).
2200) (manufactured by Bihoku Funka Co., Ltd., oil absorption 20 ml/100 g) The process was carried out in the same manner as in Example 3, except that the amount was changed to 40 parts by weight. Table 1 shows the quality evaluation of the obtained coated paper. Comparative Example 9 Example 1 was repeated except that kaolin (B kaolin) was used instead of sericite and calcium carbonate (Softon 2200) was used instead of acid clay and urea resin, and coated paper was prepared. was adjusted and its quality evaluated. The results are shown in Table-1.
【表】【table】
【表】【table】
【表】【table】
【表】
（発明の効果）
本発明の塗工紙は、塗工量を少なくしたにも拘
わらず従来法で製造したものに比較して、印刷適
性（印刷光沢、インキセツト）、白紙および印刷
不透明度において大幅に優れている。[Table] (Effects of the invention) Despite the reduced coating amount, the coated paper of the present invention has better printability (print gloss, ink set), blank paper, and print failure than paper produced by the conventional method. Significantly superior clarity.
Claims (1)
の特性を有する顔料30〜70重量部と、吸油量50
ml／100ｇ以上の顔料70〜30重量部とからなる顔
料100重量部に対し、ポリビニルアルコール３〜
20重量部を含む塗被組成物を、片面当たり乾燥重
量で１〜3.5ｇ／m2となるよう基紙の片面又は両
面に塗工したことを特徴とする印刷用軽量塗工
紙。1 Average particle size 1.0~3.5μ, 1μ pass 10~50%
30 to 70 parts by weight of pigment with the characteristics of 50 parts by weight of oil absorption
per 100 parts by weight of pigment consisting of 70 to 30 parts by weight of pigment of ml/100g or more, 3 to 3 parts by weight of polyvinyl alcohol.
1. A lightweight coated paper for printing, characterized in that a coating composition containing 20 parts by weight is coated on one or both sides of a base paper to a dry weight of 1 to 3.5 g/m 2 per side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20388387A JPS6445895A (en) | 1987-08-17 | 1987-08-17 | Lightweight coat paper for printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20388387A JPS6445895A (en) | 1987-08-17 | 1987-08-17 | Lightweight coat paper for printing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6445895A JPS6445895A (en) | 1989-02-20 |
| JPH049236B2 true JPH049236B2 (en) | 1992-02-19 |
Family
ID=16481301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20388387A Granted JPS6445895A (en) | 1987-08-17 | 1987-08-17 | Lightweight coat paper for printing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6445895A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2762879B2 (en) * | 1992-12-07 | 1998-06-04 | 日本製紙株式会社 | Recording sheet for thermosensitive stencil printing |
| JP4490518B2 (en) * | 1999-03-31 | 2010-06-30 | 日本製紙株式会社 | Release paper |
| US10369828B2 (en) | 2006-04-06 | 2019-08-06 | Hewlett-Packard Development Company, L.P. | Glossy media sheet |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5024515A (en) * | 1973-03-15 | 1975-03-15 | ||
| JPS5186532A (en) * | 1974-12-16 | 1976-07-29 | Ciba Geigy | Kamyohifukusoseibutsu |
| JPS56101997A (en) * | 1979-09-19 | 1981-08-14 | English Clays Lovering Pochin | Paper coating pigment |
-
1987
- 1987-08-17 JP JP20388387A patent/JPS6445895A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5024515A (en) * | 1973-03-15 | 1975-03-15 | ||
| JPS5186532A (en) * | 1974-12-16 | 1976-07-29 | Ciba Geigy | Kamyohifukusoseibutsu |
| JPS56101997A (en) * | 1979-09-19 | 1981-08-14 | English Clays Lovering Pochin | Paper coating pigment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6445895A (en) | 1989-02-20 |
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