JP6060949B2 - Lithographic printing ink composition - Google Patents
Lithographic printing ink composition Download PDFInfo
- Publication number
- JP6060949B2 JP6060949B2 JP2014180731A JP2014180731A JP6060949B2 JP 6060949 B2 JP6060949 B2 JP 6060949B2 JP 2014180731 A JP2014180731 A JP 2014180731A JP 2014180731 A JP2014180731 A JP 2014180731A JP 6060949 B2 JP6060949 B2 JP 6060949B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- ink composition
- oil
- printing
- acid
- 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.)
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- 238000007639 printing Methods 0.000 title claims description 72
- 239000000203 mixture Substances 0.000 title claims description 34
- 229920005989 resin Polymers 0.000 claims description 49
- 239000011347 resin Substances 0.000 claims description 49
- 239000002245 particle Substances 0.000 claims description 46
- 239000002904 solvent Substances 0.000 claims description 17
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 16
- 239000003208 petroleum Substances 0.000 claims description 14
- 239000008158 vegetable oil Substances 0.000 claims description 13
- 239000011230 binding agent Substances 0.000 claims description 7
- 229920000180 alkyd Polymers 0.000 claims description 6
- 229920001225 polyester resin Polymers 0.000 claims description 5
- 239000004645 polyester resin Substances 0.000 claims description 5
- 239000005011 phenolic resin Substances 0.000 claims description 4
- 150000002989 phenols Chemical class 0.000 claims description 4
- 229920000193 polymethacrylate Polymers 0.000 claims description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical class [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims 3
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims 3
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims 3
- 239000000758 substrate Substances 0.000 claims 1
- 239000000976 ink Substances 0.000 description 54
- 239000000843 powder Substances 0.000 description 17
- 239000003921 oil Substances 0.000 description 16
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- 230000000903 blocking effect Effects 0.000 description 13
- 239000000463 material Substances 0.000 description 13
- 235000014113 dietary fatty acids Nutrition 0.000 description 12
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- 150000004665 fatty acids Chemical class 0.000 description 12
- 239000000049 pigment Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
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- 229920002125 Sokalan® Polymers 0.000 description 2
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
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- 235000019438 castor oil Nutrition 0.000 description 2
- MWKFXSUHUHTGQN-UHFFFAOYSA-N decan-1-ol Chemical compound CCCCCCCCCCO MWKFXSUHUHTGQN-UHFFFAOYSA-N 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
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- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 150000002170 ethers Chemical class 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000003349 gelling agent Substances 0.000 description 2
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 2
- RBTKNAXYKSUFRK-UHFFFAOYSA-N heliogen blue Chemical compound [Cu].[N-]1C2=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=NC([N-]1)=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=N2 RBTKNAXYKSUFRK-UHFFFAOYSA-N 0.000 description 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 2
- 229940097275 indigo Drugs 0.000 description 2
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 2
- 239000001023 inorganic pigment Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002609 medium Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N n-propyl alcohol Natural products CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- FBUKVWPVBMHYJY-UHFFFAOYSA-N nonanoic acid Chemical compound CCCCCCCCC(O)=O FBUKVWPVBMHYJY-UHFFFAOYSA-N 0.000 description 2
- 238000007645 offset printing Methods 0.000 description 2
- 239000012860 organic pigment Substances 0.000 description 2
- 239000002540 palm oil Substances 0.000 description 2
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 2
- 229920001490 poly(butyl methacrylate) polymer Polymers 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
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- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OBETXYAYXDNJHR-SSDOTTSWSA-M (2r)-2-ethylhexanoate Chemical compound CCCC[C@@H](CC)C([O-])=O OBETXYAYXDNJHR-SSDOTTSWSA-M 0.000 description 1
- ALSTYHKOOCGGFT-KTKRTIGZSA-N (9Z)-octadecen-1-ol Chemical compound CCCCCCCC\C=C/CCCCCCCCO ALSTYHKOOCGGFT-KTKRTIGZSA-N 0.000 description 1
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- LTSWUFKUZPPYEG-UHFFFAOYSA-N 1-decoxydecane Chemical compound CCCCCCCCCCOCCCCCCCCCC LTSWUFKUZPPYEG-UHFFFAOYSA-N 0.000 description 1
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- WXHWJILFBPXYTF-UHFFFAOYSA-N 1-heptoxynonane Chemical compound CCCCCCCCCOCCCCCCC WXHWJILFBPXYTF-UHFFFAOYSA-N 0.000 description 1
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- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- SGGOJYZMTYGPCH-UHFFFAOYSA-L manganese(2+);naphthalene-2-carboxylate Chemical compound [Mn+2].C1=CC=CC2=CC(C(=O)[O-])=CC=C21.C1=CC=CC2=CC(C(=O)[O-])=CC=C21 SGGOJYZMTYGPCH-UHFFFAOYSA-L 0.000 description 1
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- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
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- IZMJMCDDWKSTTK-UHFFFAOYSA-N quinoline yellow Chemical compound C1=CC=CC2=NC(C3C(C4=CC=CC=C4C3=O)=O)=CC=C21 IZMJMCDDWKSTTK-UHFFFAOYSA-N 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
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- KQOMUSLQKQAVTD-UHFFFAOYSA-N sodium 4-hydroxy-3-[(4-nitrophenyl)diazenyl]naphthalene-1,5-disulfonic acid Chemical compound C1=CC2=C(C=C(C(=C2C(=C1)S(=O)(=O)O)O)N=NC3=CC=C(C=C3)[N+](=O)[O-])S(=O)(=O)O.[Na+] KQOMUSLQKQAVTD-UHFFFAOYSA-N 0.000 description 1
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- OJQMPIICCPYCQQ-UHFFFAOYSA-N tetracos-15-en-1-ol Chemical compound CCCCCCCCC=CCCCCCCCCCCCCCCO OJQMPIICCPYCQQ-UHFFFAOYSA-N 0.000 description 1
- JOUDBUYBGJYFFP-FOCLMDBBSA-N thioindigo Chemical compound S\1C2=CC=CC=C2C(=O)C/1=C1/C(=O)C2=CC=CC=C2S1 JOUDBUYBGJYFFP-FOCLMDBBSA-N 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000005809 transesterification reaction Methods 0.000 description 1
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- NDKWCCLKSWNDBG-UHFFFAOYSA-N zinc;dioxido(dioxo)chromium Chemical compound [Zn+2].[O-][Cr]([O-])(=O)=O NDKWCCLKSWNDBG-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Inks, Pencil-Leads, Or Crayons (AREA)
- Printing Methods (AREA)
Description
本発明は、書籍、チラシ、カタログ、ポスター等を印刷する平版印刷に使用される酸化重合型平版印刷インキ組成物（以下、「インキ」と略す。）に関するものであり、特にオフセット枚葉印刷（以下、「枚葉印刷」と略す。）の課題である裏付きとブロッキング耐性に優れたインキ組成物および印刷物に関するものである。 The present invention relates to an oxidation polymerization type lithographic printing ink composition (hereinafter abbreviated as “ink”) used for lithographic printing for printing books, leaflets, catalogs, posters, and the like, and in particular, offset sheet-fed printing ( The following description relates to an ink composition and a printed matter excellent in backing and blocking resistance, which are problems of “sheet-fed printing”.
近年印刷業界は、ＩＴの発達により紙媒体のメディアから電子媒体へのメディアへシフトしており、印刷業界全体としてその市場規模が縮小傾向にある。様々な情報源としての印刷物はその印刷部数が減少するため、取り分け枚葉印刷の市場においては小ロット、短納期のニーズが非常に高まっている。また、近年、印刷物および印刷作業現場における環境配慮への関心が年々増加してきており，高い環境対応性能を有するインキが求められてきている。 In recent years, the printing industry has shifted from a paper medium to an electronic medium due to the development of IT, and the market size of the printing industry as a whole has been on a shrinking trend. Since printed materials as various information sources are reduced in the number of printed copies, the need for small lots and short delivery times is extremely increasing in the sheet-fed printing market. In recent years, interest in environmental considerations in printed materials and printing work sites has been increasing year by year, and inks having high environmental performance have been demanded.
酸化重合型平版印刷とは、紙に印刷後、空気中の酸素によって主に植物油成分が酸化重合を起こして固化・乾燥する印刷方式である。そのため印刷直後には印刷面はまだ乾燥していないために、印刷面の裏付きや印刷後または製本後などのブロッキングを防止するべく、印刷物表面に澱粉を主成分とするパウダー（以下、「パウダー」と略す。）を散布してトラブルを予防する施策が長年に亘り使用されてきた。 Oxidation polymerization type lithographic printing is a printing method in which vegetable oil components are mainly oxidized and solidified and dried by oxygen in the air after printing on paper. Therefore, since the printed surface is not yet dried immediately after printing, a powder containing starch as a main component (hereinafter referred to as “powder”) is used to prevent the printing surface from being blocked or blocked after printing or binding. ”) Has been used for many years to prevent troubles.
しかし、印刷トラブルを予防するためのパウダー散布は、その量が多すぎても機械に堆積した粉の塊が印刷物に落ちるトラブルを招いたり、それを懸念して噴霧量を少なくしてしまうとトラブルを誘発してしまう。印刷においてパウダーの調整は非常に重要であり、パウダーレスでの枚葉印刷は長年の大きな課題となっている状況であった。 However, powder spraying to prevent printing troubles can cause trouble that the lump of powder accumulated on the machine falls on the printed matter even if the amount is too large, or if the spray amount is reduced due to concerns Will be triggered. Powder adjustment is very important in printing, and powderless sheet-fed printing has been a major issue for many years.
一方で、小ロット、短納期のニーズを満たすために、パウダーを使用しない枚葉インキに近似した性能を持った紫外線硬化型インキを採用する印刷会社が広がってきている。特許文献１には、パウダー散布の必要がない紫外線照射による乾燥と酸化重合による乾燥の両方の性質を兼ね備えた平版および活版用印刷インキが開示されている。また、特許文献２には２００〜４２０ｎｍによる発光ダイオード（ＵＶ−ＬＥＤ）が発生する紫外線により硬化する活性エネルギー線硬化型インキが開示されている。
しかし、いずれのインキも印刷機の改造が必要になったり、材料コストやランニングコストも高く、また色再現性や光沢などの面でも印刷品質は劣っているのが実情である。
On the other hand, in order to satisfy the needs of small lots and short delivery times, printing companies that use ultraviolet curable inks having performances similar to sheet-fed inks that do not use powder are spreading. Patent Document 1 discloses a lithographic and letterpress printing ink that has both properties of drying by ultraviolet irradiation and drying by oxidative polymerization that do not require powder spraying. Patent Document 2 discloses an active energy ray-curable ink that is cured by ultraviolet rays generated by a light emitting diode (UV-LED) having a wavelength of 200 to 420 nm.
However, all inks require modification of the printing press, have high material costs and running costs, and are actually inferior in print quality in terms of color reproducibility and gloss.
特許文献３には、インキ中で溶解または膨潤しない樹脂またはワックスの平均粒径０．１〜３０μｍの球状粒子の含有量が０．１〜２０重量％の印刷インキ組成物が開示されている。
特許文献４には、インキ用添加剤として高性能なポリエチレン系ワックス及びその使用方法が開示されている。
特許文献５には、こすれ汚れ防止などを可能にするコート剤および作業性が良好な印刷物が開示されている。
しかしながら、いずれの文献においてもパウダーを散布しない方式は開示されておらず、一般的なパウダーを散布する枚葉印刷方式が前提となっていることが条件であり、その中でこすれ防止やブロッキング性の向上はあっても、パウダー散布を必要としない状況には至っていない。
Patent Document 3 discloses a printing ink composition in which the content of spherical particles having an average particle size of 0.1 to 30 μm of a resin or wax that does not dissolve or swell in ink is 0.1 to 20% by weight.
Patent Document 4 discloses a high-performance polyethylene wax as an additive for ink and a method for using the same.
Patent Document 5 discloses a coating agent that enables prevention of rubbing stains and the like, and a printed matter with good workability.
However, none of the literature discloses a method that does not disperse powder, and is based on the premise that a general sheet-fed printing method that disperses powder is used. Although there is an improvement, it has not reached a situation where no powder spraying is required.
本発明者は、オフセット枚葉印刷において、架橋ポリ（メタ）アクリル酸エステル（ａ）からなる樹脂粒子（Ａ）を酸化重合型平版印刷インキに含有させることで、印刷物表面にパウダーを散布することなく印刷物の裏付きやブロッキングを防止できる印刷インキ組成物を提供する。 In the offset sheet-fed printing, the present inventor disperses the powder on the surface of the printed matter by containing the resin particles (A) made of the crosslinked poly (meth) acrylate (a) in the oxidation polymerization type lithographic printing ink. There is provided a printing ink composition capable of preventing the backing and blocking of printed matter without any problems.
本発明者等は、現状の課題を解決する事を目標とし鋭意研究を重ねた結果、架橋ポリ（メタ）アクリル酸エステル（ａ）からなる樹脂粒子（Ａ）、ロジン変性フェノール樹脂、ロジン変性マレイン酸樹脂、アルキド樹脂、ポリエステル樹脂および石油樹脂のいずれかから選ばれ、かつ、ロジン変性フェノール樹脂を必ず含むバインダー樹脂（Ｂ）（ロジン変性フェノール樹脂、ロジン変性マレイン酸樹脂、アルキド樹脂、ポリエステル樹脂または石油樹脂である場合を除く）、植物油類（Ｃ）および石油系溶剤（Ｄ）を含有する平版印刷インキ組成物であって、樹脂粒子（Ａ）の平均粒径が２〜２０μｍである平版印刷インキ組成物により、一般的に使用されている澱粉を主成分とするパウダーを散布せずに、印刷後の裏付きやブロッキング耐性に優れ、樹脂粒子が版やブランケットへのパイリング（インキ成分が堆積して紙面に転移不良を起こす印刷不良）や圧胴への取られなどの印刷適性に優れていることを見出し、本発明を完成するに至った。
As a result of intensive studies aimed at solving the current problems, the present inventors have obtained resin particles (A) comprising a crosslinked poly (meth) acrylate (a), a rosin-modified phenol resin, and a rosin-modified malein. Binder resin (B) selected from any of acid resin, alkyd resin, polyester resin and petroleum resin and necessarily containing rosin-modified phenolic resin (rosin-modified phenolic resin, rosin-modified maleic acid resin, alkyd resin, polyester resin or oil unless a resin), a lithographic printing ink compositions containing vegetable oils (C) and petroleum solvent (D), a lithographic printing average particle diameter of the resin particles (a) is 2~20μm Backing and blocking after printing without spraying commonly used starch-based powder with ink composition It has been found that the resin particles are excellent in resistance, and the resin particles are excellent in printability such as piling on a plate or a blanket (printing failure in which ink components are deposited and causing transfer failure on the paper surface) or being taken up on an impression cylinder. It came to complete.
本発明者等は、架橋ポリ（メタ）アクリル酸エステル（ａ）からなる樹脂粒子（Ａ）を含有する平版印刷インキにより、従来の枚葉印刷において必須となっているパウダーを散布することなく、安定した印刷物を得られることを見出した。 The present inventors can spread the powder that is essential in conventional sheet-fed printing with a lithographic printing ink containing resin particles (A) comprising a crosslinked poly (meth) acrylate (a), It was found that a stable printed matter can be obtained.
本発明におけるオフセット枚葉印刷とは、（１）画線部と非画線部を同一版面上に形成した版面に、ロールを介して水とインキを供給し、（２）両者の反発作用で画線部のみに着肉したインキを一度ブランケットと呼ばれるゴムシート面に移し、（３）そのブランケットに接触するように用紙を通し印刷面裏側から圧胴で加圧して印刷する印刷方法である。酸化重合型インキでは乾燥（硬化）するまでにしばらく時間が掛かる。このため乾燥するまでの間はべたつきがあり、重ね合わせた印刷物同士に付着してしまう（この現象を一般的に「裏付き」と呼ぶ）。また、乾燥後であっても過剰な圧力、温度または湿度などが高まった状態では、印刷物同士付着してしまう（この現象を一般的に「ブロッキング」と呼ぶ）。これらを予防するためにパウダーを散布するのが一般的な印刷方法である。 The offset sheet-fed printing in the present invention is (1) supplying water and ink through a roll to a plate surface in which an image line portion and a non-image line portion are formed on the same plate surface. This is a printing method in which the ink that has been deposited only on the image line portion is once transferred to a rubber sheet surface called a blanket, and (3) printing is performed by passing the paper so as to contact the blanket and pressurizing with a pressure cylinder from the back side of the printing surface. With an oxidation polymerization type ink, it takes some time to dry (cur). For this reason, there is stickiness until it dries, and it adheres to the stacked printed products (this phenomenon is generally called “backing”). Further, even after drying, when the excessive pressure, temperature, humidity, or the like is increased, the printed materials adhere to each other (this phenomenon is generally referred to as “blocking”). In order to prevent these, it is a common printing method to spray powder.
また、上記トラブルを予防したり、印刷物表面を保護するためにワックスを含有させる方法も用いられる。ただし、印刷用紙上のインキ膜厚はおよそ１μｍであるため、粒子状のものとしてはそれよりも小さすぎるとインキ膜の中に沈み込み、逆に大きすぎると版からブランケット、ブランケットから用紙へと上手く転移せずにそれぞれにパイリングを起こすことがある。 In addition, a method of containing a wax in order to prevent the above trouble or protect the printed surface is also used. However, since the ink film thickness on the printing paper is about 1 μm, if it is too small as a particulate, it sinks into the ink film, and conversely if it is too large, from the plate to the blanket, from the blanket to the paper Each of them may cause a pile without successfully transferring.
本発明における樹脂粒子（Ａ）は、架橋ポリ（メタ）アクリル酸エステル（ａ）からなる樹脂粒子である。ポリ（メタ）アクリル酸エステル（ａ）とは、ポリアクリル酸エステルまたはポリメタクリル酸エステルを意味しており、エステルとしては例えばメチル、エチル、プロピル、ブチル、ｉｓｏブチルなどが挙げられるが、これに限定されるものではない。 The resin particles (A) in the present invention are resin particles made of a crosslinked poly (meth) acrylic acid ester (a). The poly (meth) acrylic acid ester (a) means a polyacrylic acid ester or a polymethacrylic acid ester, and examples of the ester include methyl, ethyl, propyl, butyl, isobutyl and the like. It is not limited.
本発明の樹脂粒子（Ａ）は、真球状の合成樹脂であり、耐熱性に優れ、例えばポリエチレンワックスなどと比較して比重が高いことが特徴である。印刷用紙の表面に存在する粒子としては、その形状が真球に近いほど（真球度が１に近いほど）、点で反対面の印刷用紙を支えることが出来る。また、形状が真球であれば乱反射し難く、その粒子の数が少ないほど乱反射しないため、樹脂粒子を多く含有させることができ、ゆえに裏付きやブロッキングを防止できるという効果がある。 The resin particle (A) of the present invention is a true spherical synthetic resin, and is excellent in heat resistance, and has a specific gravity higher than, for example, polyethylene wax. As the particles present on the surface of the printing paper, the closer the shape is to a true sphere (the closer the sphericity is to 1), the more the printing paper on the opposite surface can be supported. In addition, if the shape is a true sphere, it is difficult to diffusely reflect, and the smaller the number of particles, the less diffusely reflected. Therefore, a large amount of resin particles can be contained, and therefore there is an effect that backing and blocking can be prevented.
真球度は、一般式（１）で定義される。本発明においては、ＳＥＭを用いて各種樹脂粒子１０００個ずつ測定、集計することで求めることができる。
一般式（１）
General formula (1)
本発明において、真球度は０．６〜１であることが好ましく、０．８〜１であることが更に好ましい。 In the present invention, the sphericity is preferably 0.6 to 1, and more preferably 0.8 to 1.
本発明における樹脂粒子（Ａ）の粒子径は、２〜２０μｍであることが好ましい。２μｍ以上であれば、粒子がインキ皮膜から印刷物表面に現れ易く、また２０μｍ以下であれば粒子が版やブランケットにパイリングし難く、好適である。 The particle diameter of the resin particles (A) in the present invention is preferably 2 to 20 μm. If the particle size is 2 μm or more, the particles are likely to appear on the surface of the printed material from the ink film.
本発明における樹脂粒子（Ａ）の粒子径は、（株）堀場製作所製レーザー回折／散乱式粒度分布測定装置 ＬＡ−９２０型を用いて、樹脂粒子をアラキード６９０２（荒川化学工業（株）製アルキド樹脂）を分散媒として透過率を９０〜９５％になるように希釈し、フローセル法にて測定した。 The particle size of the resin particles (A) in the present invention is determined by using Arakido 6902 (Arakawa Chemical Industries, Ltd. Alkyd) using a laser diffraction / scattering type particle size distribution analyzer LA-920 manufactured by Horiba, Ltd. Resin) was used as a dispersion medium to dilute the transmittance to 90 to 95% and measured by the flow cell method.
本発明における樹脂粒子（Ａ）は、粉体として使用することも可能であるが、あらかじめビヒクルに分散してコンパウンド化したものを使用しても良い。 The resin particle (A) in the present invention can be used as a powder, but it may be used after being dispersed in a vehicle and compounded.
本発明で使用されるバインダー樹脂（Ｂ）とは、ロジン変性フェノール樹脂、ロジン変性マレイン酸樹脂、アルキド樹脂、ポリエステル樹脂及び石油樹脂を示し、それらは任意に単独または２種類以上を組み合わせて使用できる。またバインダー樹脂は新日本石油（株）製ＡＦソルベント６の１０％希釈状態において白濁温度が４０〜１４０℃が好ましい。（白濁温度はＮＯＶＯＣＯＮＴＲＯＬ社製、ＣＨＥＭＯＴＲＯＮＩＣにて測定した。）４０℃未満だとワニスにした状態で充分なゲル弾性が得られず、１４０℃を超えると溶剤との親和性が悪くなる。 The binder resin (B) used in the present invention refers to rosin-modified phenol resin, rosin-modified maleic resin, alkyd resin, polyester resin and petroleum resin, which can be used alone or in combination of two or more. . The binder resin preferably has a cloudiness temperature of 40 to 140 ° C. in a 10% diluted state of AF Solvent 6 manufactured by Nippon Oil Corporation. (The white turbidity temperature was measured with CHEMOTRONIC, manufactured by NOVOCONTROL, Inc.) If it is less than 40 ° C., sufficient gel elasticity cannot be obtained in the state of varnish, and if it exceeds 140 ° C., the affinity with the solvent deteriorates.
本発明におけるバインダー樹脂（Ｂ）は、植物油類（Ｃ）および／または石油系溶剤（Ｄ）とアルミニウムキレート化合物のようなゲル化剤を添加して、１９０℃以上で溶解してワニス化したものをしようすることができる。 The binder resin (B) in the present invention is obtained by adding a vegetable oil (C) and / or a petroleum solvent (D) and a gelling agent such as an aluminum chelate compound and dissolving it at 190 ° C. or more to form a varnish. Can be used.
本発明における植物油類（Ｃ）とは、植物油及び植物油由来の化合物であり、グリセリンと脂肪酸とのトリグリセリドにおいて、少なくとも１つの脂肪酸が炭素−炭素不飽和結合を少なくとも１つ有する脂肪酸であるトリグリセリドと、それらのトリグリセリドから飽和または不飽和アルコールとをエステル反応させてなる脂肪酸モノエステル、あるいは植物油の脂肪酸とモノアルコールを直接エステル反応させた脂肪酸モノエステル、エーテル類が挙げられる。 The vegetable oil (C) in the present invention is a vegetable oil and a compound derived from a vegetable oil, and in a triglyceride of glycerin and a fatty acid, at least one fatty acid is a fatty acid having at least one carbon-carbon unsaturated bond, Examples thereof include fatty acid monoesters obtained by ester reaction of saturated or unsaturated alcohols from these triglycerides, or fatty acid monoesters obtained by direct ester reaction of vegetable oil fatty acids and monoalcohols, and ethers.
植物油として代表的ものは、アサ実油、アマニ油、エノ油、オイチシカ油、オリーブ油、カカオ油、カポック油、カヤ油、カラシ油、キョウニン油、キリ油、ククイ油、クルミ油、ケシ油、ゴマ油、サフラワー油、ダイコン種油、大豆油、大風子油、ツバキ油、トウモロコシ油、ナタネ油、ニガー油、ヌカ油、パーム油、ヒマシ油、ヒマワリ油、ブドウ種子油、ヘントウ油、松種子油、綿実油、ヤシ油、落花生油、脱水ヒマシ油などが挙げられる。 Typical vegetable oils are: Asa seed oil, flaxseed oil, eno oil, psyllium oil, olive oil, cacao oil, kapok oil, kaya oil, mustard oil, kyounin oil, kiri oil, kukui oil, walnut oil, poppy oil, sesame oil , Safflower oil, radish seed oil, soybean oil, daikon oil, camellia oil, corn oil, rapeseed oil, niger oil, nuka oil, palm oil, castor oil, sunflower oil, grape seed oil, gentian oil, pine seed oil Cottonseed oil, palm oil, peanut oil, dehydrated castor oil, and the like.
脂肪酸モノエステルは上記植物油とモノアルコールとをエステル交換したものや植物油の脂肪酸とモノアルコールを直接エステル反応させた脂肪酸モノエステルである。モノアルコールの代表的なものは、メタノール、エタノール、ｎ−又はｉｓｏ−プロパノール、ｎ，ｓｅｃ又はｔｅ ｔ−ブタノール、ヘプチノール、２−エチルヘキサノール、ヘキサノール、オクタノール、デカノール、ドデカノール等の飽和アルコール、オレイルアルコール、ドデセノール、フイセテリアルコール、ゾンマリルアルコール、ガドレイルアルコール、１１−イコセノール、１１−ドコセノール、１５−テトラコセノール等の不飽和脂肪族系アルコールが挙げられる。 The fatty acid monoester is a fatty acid monoester obtained by transesterification of the above vegetable oil and monoalcohol or a direct ester reaction between the fatty acid of the vegetable oil and monoalcohol. Typical examples of monoalcohol include saturated alcohols such as methanol, ethanol, n- or iso-propanol, n, sec or t-butanol, heptynol, 2-ethylhexanol, hexanol, octanol, decanol, dodecanol, and oleyl alcohol. , Unsaturated fatty alcohols such as dodecenol, huseteri alcohol, somaryl alcohol, gadrelyl alcohol, 11-icosenol, 11-docosenol, 15-tetracosenol.
エーテル類として代表的なものは、ジ−ｎ−オクチルエーテル、ジノニルエーテル、ジへプチルエーテル、ジヘキシルエーテル、ジデシルエーテル、ノニルへキシルエーテル、ノニルヘプチルエーテル、ノニルオクチルエーテル等が挙げられる。 Representative examples of ethers include di-n-octyl ether, dinonyl ether, diheptyl ether, dihexyl ether, didecyl ether, nonyl hexyl ether, nonyl heptyl ether, nonyl octyl ether and the like.
本発明で使用される石油系溶剤（Ｄ）とは、芳香族炭化水素の含有量が１重量％以下の原油由来の溶剤（石油系溶剤）である。この石油系溶剤はアニリン点が７０〜１２０℃、沸点が２３０℃以上の石油系溶剤が適当である。アニリン点が７０℃未満の場合には樹脂を溶解させる能力が高すぎる為インキ組成物の粘度が低くなりすぎ地汚れ耐性が充分でなくなる。またアニリン点が１２０℃を超える場合には樹脂の溶解性が乏しい為、インキ組成物の流動性が劣り、その結果光沢、着肉性が悪い印刷物しか得ることができず好ましくない。沸点が２３０℃未満の場合には印刷機上でのインキ中溶剤の放出量が多くなり、インキ組成物の流動性の劣化により、ローラー、版、ブランケットへのインキ組成物の堆積が起こり易くなる為、好ましくない。 The petroleum solvent (D) used in the present invention is a crude oil-derived solvent (petroleum solvent) having an aromatic hydrocarbon content of 1% by weight or less. As the petroleum solvent, a petroleum solvent having an aniline point of 70 to 120 ° C. and a boiling point of 230 ° C. or more is suitable. When the aniline point is lower than 70 ° C., the ability to dissolve the resin is too high, so that the viscosity of the ink composition becomes too low and the stain resistance is not sufficient. On the other hand, when the aniline point exceeds 120 ° C., the solubility of the resin is poor, so that the fluidity of the ink composition is inferior. When the boiling point is less than 230 ° C., the amount of solvent released in the ink on the printing press increases, and the ink composition tends to deposit on rollers, plates, and blankets due to the deterioration of the fluidity of the ink composition. Therefore, it is not preferable.
本発明における平版印刷インキ組成物の配合例としては、平版印刷インキ組成物全量中、樹脂粒子（Ａ）が０．１〜５重量％、バインダー樹脂（Ｂ）が２０〜５０重量％、植物油類（Ｃ）が１０〜６０重量％、石油系溶剤（Ｄ）が５０重量％以下であることが好ましい。さらに、好ましくは樹脂粒子（Ａ）が０．５〜３重量％、バインダー樹脂（Ｂ）が２５〜３５重量％、植物油類（Ｃ）が２０〜５０重量％、石油系溶剤（Ｄ）が３０％以下である。これ以外の比率になった場合は、印刷において裏付きやブロッキングだけでなく、汚れ、転移不良、乾燥不良、パイリングなどの印刷不良を起こす虞がある。 Examples of the composition of the lithographic printing ink composition in the present invention include 0.1 to 5% by weight of resin particles (A), 20 to 50% by weight of binder resin (B), and vegetable oils in the total amount of the lithographic printing ink composition. It is preferable that (C) is 10 to 60% by weight and the petroleum solvent (D) is 50% by weight or less. Further, the resin particles (A) are preferably 0.5 to 3% by weight, the binder resin (B) is 25 to 35% by weight, the vegetable oils (C) are 20 to 50% by weight, and the petroleum solvent (D) is 30%. % Or less. When the ratio is other than the above, not only backing and blocking but also printing failure such as dirt, transfer failure, drying failure, and piling may occur in printing.
本発明において、インキの顔料としては、一般的な無機顔料及び有機顔料を示すことが出来るが、使用しない場合にはＯＰニスとなるため、使用することを限定するものではない。使用する場合の無機顔料としては、黄鉛、亜鉛黄、紺青、硫酸バリウム、カドミウムレッド、酸化チタン、亜鉛華、弁柄、アルミナホワイト、炭酸カルシウム、群青、カーボンブラック、グラファイト、アルミニウム粉、などを示すことができる。有機顔料としては、アゾ系として、Ｃ系（βナフトール系）、２Ｂ系及び６Ｂ系（βオキシナフトエ系）などの溶性アゾ顔料、βナフトール系、βオキシナフトエ酸アニリド系、モノアゾイエロー系、ジスアゾイエロー系、ピラゾロン系などの不溶性アゾ顔料、アセト酢酸アリリド系などの縮合アゾ顔料、フタロシアニン系として、銅フタロシアニン（αブルー、βブルー、γブルー）、塩素、臭素などのハロゲン化銅フタロシアニン、金属フリーのフタロシアニン顔料、多環顔料としてペリレン系、キナクリドン系、チオインジゴ系、ジオキサジン系、イソインドリノン系、キノフタロン系顔料を挙げることができる。顔料の添加量は、印刷インキ組成物全量中、５〜２５重量％である。 In the present invention, as the pigment of the ink, general inorganic pigments and organic pigments can be shown. However, when not used, OP varnish is used, so that the use is not limited. Inorganic pigments for use include chrome yellow, zinc yellow, bitumen, barium sulfate, cadmium red, titanium oxide, zinc white, petal, alumina white, calcium carbonate, ultramarine, carbon black, graphite, aluminum powder, etc. Can show. Organic pigments include azo pigments, soluble azo pigments such as C-based (β-naphthol-based), 2B-based and 6B-based (β-oxynaphthoic-based), β-naphthol-based, β-oxynaphthoic acid anilide-based, monoazo yellow-based, disazo Insoluble azo pigments such as yellow and pyrazolone, condensed azo pigments such as acetoacetate allylide, phthalocyanine, copper phthalocyanine (α blue, β blue, γ blue), halogenated copper phthalocyanine such as chlorine and bromine, metal free Examples of the phthalocyanine pigments and polycyclic pigments include perylene, quinacridone, thioindigo, dioxazine, isoindolinone, and quinophthalone pigments. The addition amount of the pigment is 5 to 25% by weight in the total amount of the printing ink composition.
さらに、本発明において、該インキには必要に応じてその他の添加剤を使用する事が可能である。 Furthermore, in this invention, it is possible to use another additive for this ink as needed.
例えば、乾燥を促進させる添加剤としては、酢酸、プロピオン酸、酪酸、イソペンタン酸、ヘキサン酸、２−エチル酪酸、ナフテン酸、オクチル酸、ノナン酸、デカン酸、２−エチルヘキサン酸、イソオクタン酸、イソノナン酸、ラウリル酸、パルミチン酸、ステアリン酸、オレイン酸、リノール酸、ネオデカン酸、バーサチック酸、セカノイック酸、トール油脂肪酸、アマニユ脂肪酸、大豆油脂肪酸、ジメチルヘキサノイック酸、３，５，５−トリメチルヘキサノイック酸、ジメチルオクタノイック酸などの有機カルボン酸の金属塩、たとえばカルシウム、コバルト、鉛、鉄、マンガン、亜鉛、ジルコニウム、塩などの公知公用の化合物が使用可能であり、印刷インキ表面および内部硬化を促進するために、これらの複数を適宜併用して使用することもできる。 For example, additives that promote drying include acetic acid, propionic acid, butyric acid, isopentanoic acid, hexanoic acid, 2-ethylbutyric acid, naphthenic acid, octylic acid, nonanoic acid, decanoic acid, 2-ethylhexanoic acid, isooctanoic acid, Isononanoic acid, lauric acid, palmitic acid, stearic acid, oleic acid, linoleic acid, neodecanoic acid, versatic acid, secanoic acid, tall oil fatty acid, linseed fatty acid, soybean oil fatty acid, dimethylhexanoic acid, 3,5,5- Metal salts of organic carboxylic acids such as trimethylhexanoic acid and dimethyloctanoic acid, for example, publicly known compounds such as calcium, cobalt, lead, iron, manganese, zinc, zirconium and salts can be used as printing inks. Use several of these in combination as appropriate to promote surface and internal curing. It is also possible to.
以下、具体例を示して本発明の説明を行うが、本発明は以下の実施例により、何ら制限されるものではない。なお、本発明中「部」とは「重量部」を示し、特に断らない限り、「％」とは「重量％」を示す。 Hereinafter, the present invention will be described with reference to specific examples, but the present invention is not limited to the following examples. In the present invention, “part” means “part by weight”, and “%” means “% by weight” unless otherwise specified.
（平版印刷インキ用ワニスの製造例）撹拌機、水分離器付還流冷却器、温度計付き４つ口フラスコに、ロジン変性フェノール樹脂（荒川化学工業（株）製タマノル４１４）４５部、大豆油３５部、石油系溶剤（ＪＸ日鉱日石エネルギー（株）製ＡＦソルベント６）１９部、ゲル化剤（川研ファインケミカル（株）製ＡＬＣＨ）１部を１９０℃で１時間加熱撹拌してオフセット印刷インキ用ワニス（以下単に「ワニス」という）を得た。 (Example of production of varnish for lithographic printing ink) Stirrer, reflux condenser with water separator, 4-neck flask with thermometer, rosin-modified phenolic resin (Tamanol 414 manufactured by Arakawa Chemical Industries, Ltd.) 45 parts, soybean oil 35 parts, 19 parts of petroleum solvent (AF solvent 6 manufactured by JX Nippon Oil & Energy Corporation) and 1 part of gelling agent (ALCH manufactured by Kawaken Fine Chemical Co., Ltd.) are heated and stirred at 190 ° C for 1 hour for offset printing. An ink varnish (hereinafter simply referred to as “varnish”) was obtained.
（平版印刷インキ組成物の製造例）表１に示す配合割合に従って三本ロールを用いてインキを練肉し、その後添加剤を混合してインキ組成物を得た。顔料としては、黄、紅、藍、墨（トヨーカラー株式会社製「ＬＩＯＮＯＬＹＥＬＬＯＷＧＲＬ」、「ＬＩＯＮＯＬＲＥＤ６ＢＦＧ４２３１」、「ＬＩＯＮＯＬＢＬＵＥＦＧ７３３０」、三菱化学株式会社製「ＭＡ７７」）を使用し、プロセス４色のインキ組成物を１セットとする。コーンアンドプレート型粘度計で２５℃、シェアレート１００/ｓにおける粘度を７００〜７５０ｐｓになるようワニス、溶剤（ＪＸ日鉱日石エネルギー株式会社「ＡＦソルベント６」）およびナフテン酸マンガンの比率を調整した。 (Production example of lithographic printing ink composition) According to the mixing ratio shown in Table 1, the ink was kneaded using three rolls, and then the additives were mixed to obtain an ink composition. As the pigment, yellow, red, indigo, and black ("LIONOLLYELLOWGRL", "LIONOLRED6BFG4231", "LIONOLBLUEFG7330", manufactured by Mitsubishi Chemical Corporation "MA77") manufactured by Toyocolor Co., Ltd., and a process four-color ink composition 1 Set. The ratios of varnish, solvent (JX Nippon Oil & Energy Corporation “AF Solvent 6”) and manganese naphthenate were adjusted so that the viscosity at 25 ° C. and a shear rate of 100 / s would be 700 to 750 ps with a cone and plate viscometer. .
（実施例１〜１３）
前記平版印刷インキ組成物に、表２の配合割合に従って樹脂粒子（Ａ１〜４；ポリメタクリル酸メチル架橋物）、樹脂粒子（Ａ５；ポリメタクリル酸ブチル架橋物）、樹脂粒子（Ａ６；ポリアクリル酸エステル架橋物）を混合し、実施例１〜１３を得た。
(Examples 1 to 13)
In the lithographic printing ink composition, resin particles (A1 to 4; crosslinked polymethyl methacrylate), resin particles (A5; crosslinked polybutyl methacrylate), resin particles (A6; polyacrylic acid) according to the blending ratios in Table 2 Example 1-13 was obtained by mixing ester cross-linked product).
なお、表２中の樹脂粒子の詳細は下記の通りである。
＜架橋ポリメタクリル酸メチル＞
樹脂粒子（Ａ１）：エポスターＭＡ１０１０（日本触媒社製）、平均粒子径１０．５（μｍ）
樹脂粒子（Ａ２）：テクポリマーＳＳＸ−１０３（積水化成品工業製）、平均粒子径３．２（μｍ）
樹脂粒子（Ａ３）：テクポリマーＳＳＸ−１０８（積水化成品工業製）、平均粒子径８．４（μｍ）
樹脂粒子（Ａ４）：テクポリマーＳＳＸ−１１５（積水化成品工業製）、平均粒子径１５．７（μｍ）
＜架橋ポリメタクリル酸ブチル＞
樹脂粒子（Ａ５）：テクポリマーＢＭ３０Ｘ−８（積水化成品工業製）、平均粒子径８．３（μｍ）
＜架橋ポリアクリル酸エステル＞
樹脂粒子（Ａ６）：テクポリマーＡＢＸ−８（積水化成品工業製）、平均粒子径８．２（μｍ）
The details of the resin particles in Table 2 are as follows.
<Crosslinked polymethyl methacrylate>
Resin particles (A1): Eposta MA1010 (manufactured by Nippon Shokubai Co., Ltd.), average particle size 10.5 (μm)
Resin particles (A2): Techpolymer SSX-103 (manufactured by Sekisui Plastics Co., Ltd.), average particle diameter 3.2 (μm)
Resin particles (A3): Techpolymer SSX-108 (manufactured by Sekisui Plastics Co., Ltd.), average particle size 8.4 (μm)
Resin particles (A4): Techpolymer SSX-115 (manufactured by Sekisui Plastics Co., Ltd.), average particle diameter 15.7 (μm)
<Crosslinked polybutyl methacrylate>
Resin particles (A5): Techpolymer BM30X-8 (manufactured by Sekisui Plastics Co., Ltd.), average particle size 8.3 (μm)
<Crosslinked polyacrylate>
Resin particles (A6): Techpolymer ABX-8 (manufactured by Sekisui Plastics Co., Ltd.), average particle size 8.2 (μm)
（比較例１〜３）
前記平版印刷インキ組成物をそのまま比較例１とし、平版印刷インキ組成物に表３の配合割合に従って澱粉粒子（大崎化学株式会社製 「ドライアップＫＰ」）またはポリエチレンワックス（三井化学株式会社製「ケミパールＷ８００」）を混合し、比較例２、３を得た。
(Comparative Examples 1-3)
The lithographic printing ink composition was used as Comparative Example 1 as it was, and starch particles ("Dry-up KP" manufactured by Osaki Chemical Co., Ltd.) or polyethylene wax ("Chemical Pearl" manufactured by Mitsui Chemicals, Inc.) according to the blending ratios shown in Table 3 W800 ") was mixed to obtain Comparative Examples 2 and 3.
（印刷試験の条件および評価項目）
実施例１〜１３および比較例１〜３で得られた平版印刷インキ組成物を用いてオフセット枚葉印刷機で、おもて面を以下の条件でパウダーを散布することなく印刷した。この時の印刷機へのブランケットパイリング状態を目視にて評価した。その後紙面上の平版印刷インキ組成物を完全に乾燥させる為に一晩以上放置し裏返して同機にて印刷した。裏面への印刷前に裏付き状態を目視にて評価を行った。裏面印刷後に圧胴へのインキ組成物の付着を目視にて評価した。印刷物の４色重ね部分の光沢値を、村上色彩研究所製光沢計ＧＭ−２６Ｄにて評価した。同４色重ね部分同士が接触するようにし、温度４０℃湿度５０％の恒温恒湿室で１ｋｇ／ｃｍ2の荷重で２４時間静置した後、印刷物を引き剥がしたブロッキング状態を評価した。なお、全ての評価結果を表２，３に示す。
・印刷機 ：株式会社小森コーポレーション製 ＬＩＴＨＲＯＮ４２６
・用紙 ：パールコートＮ
・印刷速度 ：１３０００ｓｐｈ
・印刷枚数 ：７０００枚
・印刷濃度 ：黄 １．４０、紅 １．５０、藍 １．６０、墨 １．８０
（濃度は印刷機付属の濃度測定機にて測定した。）
(Printing test conditions and evaluation items)
Using the lithographic printing ink compositions obtained in Examples 1 to 13 and Comparative Examples 1 to 3, the front surface was printed without spraying powder under the following conditions with an offset sheet-fed printing press. The blanket piling state on the printing press at this time was visually evaluated. Thereafter, in order to completely dry the lithographic printing ink composition on the paper surface, it was left to stand overnight and turned over and printed on the same machine. Prior to printing on the back side, the backing state was evaluated visually. The adhesion of the ink composition to the impression cylinder after the back side printing was visually evaluated. The gloss value of the four-color overlapping portion of the printed material was evaluated with a gloss meter GM-26D manufactured by Murakami Color Research Laboratory. The four-color overlapping portions were brought into contact with each other, and after standing at a load of 1 kg / cm 2 for 24 hours in a constant temperature and humidity chamber at a temperature of 40 ° C. and a humidity of 50%, the blocking state in which the printed material was peeled was evaluated. All the evaluation results are shown in Tables 2 and 3.
・ Printer: LITHORON 426 manufactured by Komori Corporation
・ Paper: Pearl coat N
・ Printing speed: 13000 sph
-Number of prints: 7000-Print density: Yellow 1.40, Red 1.50, Indigo 1.60, Black 1.80
(The density was measured with a density measuring machine attached to the printing press.)
ブランケットへのパイリングは、７０００枚印刷後にブランケット非画線部に印刷インキ組成物がほとんどない状態を◎、少ない状態を〇、やや色がついて汚れている状態を△、堆積した状態を×とした。 For the blanking, 7000 indicates that there is almost no printing ink composition in the blanket non-image area after printing 7000 sheets, ○ indicates that there is little printing ink composition, △ indicates that it is slightly colored and dirty, and X indicates that it is accumulated. .
裏付きは、まだ白紙の状態の裏面への印刷インキ組成物が全く付着していない状態を◎、ほとんど付着していない状態を〇、所々散見している状態を△、完全に汚れている状態を×とした。 Backing is a state where the printing ink composition is not attached to the back side of a blank paper, ◎, a state where there is almost no adhesion, △ a state where it is scattered, and a state where it is completely dirty Was marked with x.
圧胴取られは、圧胴表面に印刷インキ組成物がほとんど確認できない状態を◎、少ない状態を〇、やや色がついて汚れている状態を△、堆積した状態を×とした。 For the impression cylinder removal, the state in which the printing ink composition could hardly be confirmed on the surface of the impression cylinder was marked with ◎, the state with few impressions was marked with ○, the condition with a slight color stain was marked with △, and the state where it was deposited was marked with x.
光沢は、オフセット印刷インキ組成物である比較例１と、光沢差が一般的に視認できない−３ポイント以内であれば実用範囲内であり、差がはっきりと確認できる−５ポイント以上は実用範囲ではないと判断できる。 The gloss is within the practical range as long as it is within -3 points where the gloss difference is generally not visually recognized as compared with Comparative Example 1 which is an offset printing ink composition, and the difference can be clearly confirmed. It can be judged that there is no.
ブロッキングは、印刷物表面に全く影響がない状態を◎、ほとんど影響のない状態を〇、所々が付着したために細かく白く抜ける状態を△、完全に付着していて印刷物表面を剥いてしまう状態を×とした。 Blocking means ◎ when there is no effect on the surface of the printed material, ◯ when there is almost no effect, △ when the material is finely whitened due to the attachment, and × when it is completely attached and peels off the surface of the printed material. did.
実施例１〜１３は、ブランケットパイリング、裏付き、圧胴取られおよびブロッキングが少なく、光沢が良好である。平版印刷インキ組成物である比較例１は、ブランケットパイリングは少なく、光沢は良好であるが、粒子物が含まれないために裏付きと圧胴取られが多く、ブロッキングも悪い。澱粉粒子を添加した比較例２は、ブランケットパイリング、裏付きは少ないが、圧胴取られ、ブロッキングが多く、光沢も低い。ポリエチレンワックスを添加した比較例３は、ブロッキングは少ないが、ブランケットパイリング、裏付き、圧胴取られが多く、光沢が低い。 In Examples 1 to 13, blanket piling, backing, impression cylinder removal, blocking is small, and gloss is good. Comparative Example 1, which is a lithographic printing ink composition, has little blanket piling and good gloss, but because it does not contain particulate matter, it is often covered and impression cylinders, and has poor blocking. Comparative Example 2 to which starch particles are added has little blanket piling and backing, but the impression cylinder is removed, the blocking is large, and the gloss is low. Comparative Example 3 to which polyethylene wax was added has little blocking, but has a lot of blanket piling, backing, impression cylinder removal, and low gloss.
以上のように、本願発明の平版印刷インキ組成物を用いることによって、印刷物表面にパウダーを噴霧することなく印刷物の裏付きやブロッキングを防止できる、光沢に優れた印刷物を提供できる平版印刷インキ組成物を提供することができた。 As described above, by using the lithographic printing ink composition of the present invention, the lithographic printing ink composition can provide a glossy printed material that can prevent the backing and blocking of the printed material without spraying powder on the surface of the printed material. Could be provided.
Claims (2)
樹脂粒子（Ａ）の平均粒径が２〜２０μｍである平版印刷インキ組成物。 Resin particle (A) comprising crosslinked poly (meth) acrylate (a), rosin modified phenolic resin, rosin modified maleic resin, alkyd resin, polyester resin and petroleum resin, and rosin modified phenol Resin-containing binder resin (B), vegetable oil (C) (except for rosin-modified phenol resin, rosin-modified maleic resin, alkyd resin, polyester resin or petroleum resin), and petroleum solvent (D) A lithographic printing ink composition containing ,
A lithographic printing ink composition in which the resin particles (A) have an average particle size of 2 to 20 μm.
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| JPS62143984A (en) * | 1985-12-19 | 1987-06-27 | Toyo Ink Mfg Co Ltd | Printing ink |
| JPH06116525A (en) * | 1992-10-02 | 1994-04-26 | Toyo Ink Mfg Co Ltd | Ink composition for stencil printing |
| JPH07224239A (en) * | 1994-02-10 | 1995-08-22 | Japan Synthetic Rubber Co Ltd | Fine polymer particle for ink jet recording ink |
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| JP4809712B2 (en) * | 2006-04-27 | 2011-11-09 | 大日本印刷株式会社 | Coating agent and printed matter for offset printing |
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