JP6106889B2 - Pressure sensitive correction tape - Google Patents
Pressure sensitive correction tape Download PDFInfo
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- JP6106889B2 JP6106889B2 JP2013031242A JP2013031242A JP6106889B2 JP 6106889 B2 JP6106889 B2 JP 6106889B2 JP 2013031242 A JP2013031242 A JP 2013031242A JP 2013031242 A JP2013031242 A JP 2013031242A JP 6106889 B2 JP6106889 B2 JP 6106889B2
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- 238000012937 correction Methods 0.000 title claims description 58
- 239000010410 layer Substances 0.000 claims description 198
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 156
- 239000000377 silicon dioxide Substances 0.000 claims description 77
- 229920001225 polyester resin Polymers 0.000 claims description 42
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- 238000010521 absorption reaction Methods 0.000 claims description 30
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- 239000007787 solid Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 20
- 239000002253 acid Substances 0.000 claims description 16
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- 239000000123 paper Substances 0.000 description 45
- 239000000976 ink Substances 0.000 description 42
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- 238000000576 coating method Methods 0.000 description 27
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- 230000000873 masking effect Effects 0.000 description 20
- 238000012546 transfer Methods 0.000 description 20
- 230000007423 decrease Effects 0.000 description 17
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 14
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 11
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- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 9
- 239000000758 substrate Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
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- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
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- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 2
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- 229910000021 magnesium carbonate Inorganic materials 0.000 description 2
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- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- CAAMSDWKXXPUJR-UHFFFAOYSA-N 3,5-dihydro-4H-imidazol-4-one Chemical compound O=C1CNC=N1 CAAMSDWKXXPUJR-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
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- 229920002367 Polyisobutene Polymers 0.000 description 1
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- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- NRCMAYZCPIVABH-UHFFFAOYSA-N Quinacridone Chemical compound N1C2=CC=CC=C2C(=O)C2=C1C=C1C(=O)C3=CC=CC=C3NC1=C2 NRCMAYZCPIVABH-UHFFFAOYSA-N 0.000 description 1
- 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 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical compound C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000003522 acrylic cement Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 1
- 150000004056 anthraquinones Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 125000000751 azo group Chemical group [*]N=N[*] 0.000 description 1
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 description 1
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- CJOBVZJTOIVNNF-UHFFFAOYSA-N cadmium sulfide Chemical compound [Cd]=S CJOBVZJTOIVNNF-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
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- PPSZHCXTGRHULJ-UHFFFAOYSA-N dioxazine Chemical compound O1ON=CC=C1 PPSZHCXTGRHULJ-UHFFFAOYSA-N 0.000 description 1
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- 239000004744 fabric Substances 0.000 description 1
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- 239000010419 fine particle Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
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- 239000011086 glassine Substances 0.000 description 1
- 229920006270 hydrocarbon resin Polymers 0.000 description 1
- 229920002681 hypalon Polymers 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 239000001034 iron oxide pigment Substances 0.000 description 1
- PXZQEOJJUGGUIB-UHFFFAOYSA-N isoindolin-1-one Chemical compound C1=CC=C2C(=O)NCC2=C1 PXZQEOJJUGGUIB-UHFFFAOYSA-N 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- NYGZLYXAPMMJTE-UHFFFAOYSA-M metanil yellow Chemical group [Na+].[O-]S(=O)(=O)C1=CC=CC(N=NC=2C=CC(NC=3C=CC=CC=3)=CC=2)=C1 NYGZLYXAPMMJTE-UHFFFAOYSA-M 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
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- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- 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 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
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- 238000001556 precipitation Methods 0.000 description 1
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- JEXVQSWXXUJEMA-UHFFFAOYSA-N pyrazol-3-one Chemical compound O=C1C=CN=N1 JEXVQSWXXUJEMA-UHFFFAOYSA-N 0.000 description 1
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- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Laminated Bodies (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
Description
本発明は、例えば紙面上の筆記等を修正するために用いる感圧修正テープに関するものである。 The present invention relates to a pressure-sensitive correction tape used for correcting, for example, writing on paper.
例えばボールペン（油性ボールペン、ゲルインクボールペン等）、サインペン、マーカーペン等による筆記やプリンタ等による印字を修正、すなわち前記筆記等を隠蔽したり、隠蔽した上に新たに筆記等をしたりするために、感圧修正テープが広く用いられる。
前記感圧修正テープとしては、両面に離型処理が施された基材の片面に、隠蔽層、および粘着層をこの順に積層したもの等が挙げられる。かかる感圧修正テープは、ロール状に捲回したものを、ホルダを兼ねる転写具に装填した状態で使用されるのが一般的である。
For example, to correct writing by a ballpoint pen (oil-based ballpoint pen, gel ink ballpoint pen, etc.), sign pen, marker pen, etc. or printing by a printer, etc., in order to conceal the writing etc. Pressure sensitive correction tape is widely used.
Examples of the pressure-sensitive correction tape include those obtained by laminating a concealing layer and an adhesive layer in this order on one side of a base material that has been subjected to release treatment on both sides. Such pressure-sensitive correction tape is generally used in a state in which a roll wound is loaded on a transfer tool that also serves as a holder.
すなわち転写具に装填した感圧修正テープを、前記転写具に設けたブレード状のヘッドによって基材の背面側から押圧して、当該感圧修正テープの粘着層を紙面に圧接させた状態で、前記転写具を前記紙面上で移動させる。
そうすると、感圧修正テープがロールから順次繰り出されるとともに、隠蔽層が基材から順次剥離されて、ヘッドの圧接力と粘着層の粘着力によって紙面上に転写、圧着され、それによって前記紙面上の筆記等が隠蔽層によって隠蔽、すなわち修正される。
That is, in a state where the pressure-sensitive correction tape loaded in the transfer tool is pressed from the back side of the substrate by the blade-shaped head provided in the transfer tool, and the pressure-sensitive adhesive layer of the pressure-sensitive correction tape is pressed against the paper surface, The transfer tool is moved on the paper surface.
Then, the pressure-sensitive correction tape is sequentially fed out from the roll, and the concealing layer is peeled off from the base material in sequence, and is transferred and pressure-bonded on the paper surface by the pressure contact force of the head and the adhesive force of the pressure-sensitive adhesive layer. The writing or the like is concealed, that is, corrected by the concealment layer.
前記感圧修正テープの隠蔽層には、隠蔽した紙面上の筆記等からインクがブリードして、隠蔽層を通して視認できるようになるのを防止するために、各種のインクがブリードするのを防止する特性、すなわち耐ブリード性に優れていることが求められる。
また隠蔽層には、紙面上の筆記等を隠蔽した上に、例えばボールペン等を用いて新たに筆記をした際に、インクを吸収して速やかに乾燥させるとともに良好に定着させることができて、当該筆記に例えば手で触れたり、紙を重ねてこすり合わせたりした際等に前記筆記が滲んでしまわない特性、すなわち再筆記性に優れていることや、隠蔽層上に筆記したインクが内部に吸収されずに隠蔽層の表面近傍に留まって、前記表面において十分な筆記濃度を維持できること等も求められる。
In the concealing layer of the pressure-sensitive correction tape, various inks are prevented from bleeding in order to prevent the ink from bleeding from writing on the concealed paper surface and becoming visible through the concealing layer. It is required to have excellent characteristics, that is, bleed resistance.
In addition, the concealing layer conceals writing on the paper surface, and when newly writing using, for example, a ballpoint pen, the ink can be absorbed and dried quickly and well fixed. For example, when the handwriting is touched or rubbed over the paper, the writing does not bleed, that is, the rewriting property is excellent, and the ink written on the concealing layer is absorbed inside. It is also demanded that the surface remains in the vicinity of the surface of the concealing layer and a sufficient writing concentration can be maintained on the surface.
さらに隠蔽層には、紙面上に転写後にヘッドを紙面から引き離すことで、転写された末端と、未使用の感圧修正テープ側の未転写の先端とが良好に分離されて、紙面上の隠蔽層が転写最終位置（ヘッドを引き離した位置）より後方にはみ出さない特性、すなわち膜切れ性に優れていることも求められる。
前記隠蔽層は、バインダ樹脂に、酸化チタン等の白顔料他の各種添加剤を配合し、さらに任意の溶剤に溶解または分散させた塗布液を、離型処理を施した基材の片面に塗布し、乾燥させて形成するのが一般的である。バインダ樹脂としては、任意の成膜性の樹脂が使用される。
In addition, the concealing layer provides a concealment on the paper surface by separating the transferred end and the untransferred tip on the unused pressure-sensitive correction tape side by separating the head from the paper surface after transfer onto the paper surface. It is also required that the layer does not protrude beyond the final transfer position (position where the head is separated), that is, it has excellent film cutting properties.
The concealing layer is a mixture of a binder resin and various other additives such as titanium oxide, and a coating solution dissolved or dispersed in an arbitrary solvent is applied to one side of a substrate subjected to a release treatment. It is generally formed by drying. As the binder resin, any film forming resin is used.
また膜切れ性と、柔軟性や基材に対する追従性とを良好にバランスさせるため、前記隠蔽層には、シリカ等の充填剤や、あるいはスチレン−エチレンブチレン−スチレン（ＳＥＢＳ）ブロック共重合樹脂等のゴム状樹脂を配合するのが一般的である。
特許文献１には、前記充填剤として、日本工業規格ＪＩＳ Ｋ５１０１−１３−１：２００４「顔料試験方法−第１３部：吸油量−第１節：精製あまに油法」に則って測定された吸油量が１５０ｇ／１００ｇ以下のシリカを、隠蔽層を形成する固形分の総量中の３〜５０質量％の割合で配合することが記載されている。
In addition, in order to satisfactorily balance film breakability and flexibility and followability to the base material, the concealing layer includes a filler such as silica, or a styrene-ethylenebutylene-styrene (SEBS) block copolymer resin. In general, the rubber-like resin is blended.
In Patent Document 1, as the filler, it was measured according to Japanese Industrial Standard JIS K5101-13-1: 2004 “Pigment Test Method—Part 13: Oil Absorption—Section 1: Refined Sesame Oil Method”. It describes that silica having an oil absorption of 150 g / 100 g or less is blended in a proportion of 3 to 50% by mass in the total amount of solids forming the concealing layer.
かかる吸油量の小さいシリカを前記の割合で配合することにより、隠蔽層の全体でのインクの吸収性を抑えて、隠蔽した紙面上の筆記等からインクが隠蔽層にブリードするのを抑制し、耐ブリード性を向上することが期待される。
しかし、この場合には隠蔽層の上に筆記したインクの吸収性も低下するため、当該筆記に手で触れたり、紙を重ねてこすり合わせたりした際等に前記筆記が滲みやすくなる、つまり再筆記性が低下するという問題がある。
By blending such a small amount of oil-absorbing silica at the above ratio, the ink absorbability of the entire concealing layer is suppressed, and the ink is prevented from bleeding from the writing on the concealed paper surface, It is expected to improve bleed resistance.
However, in this case, since the absorbency of the ink written on the concealing layer also decreases, the writing tends to spread when the writing is touched by hand, or when the paper is rubbed over the paper. There is a problem that the performance is lowered.
特許文献２の実施例３では、充填剤として微細シリカ〔水沢化学工業(株)製のミズカシル（登録商標）Ｐ−８０１〕を用いており、かかる微細シリカの吸油量は、前記範囲を超える２００ｍｌ／１００ｇであるが、かかる吸油量では依然として隠蔽層の全体でのインクの吸収性が不十分であり、再筆記性は不十分なままである。
特許文献３には、粘着層と隠蔽層との間にバリヤ層を設けて、隠蔽した紙面上の筆記等からインクが隠蔽層にブリードするのを防止することが記載されている。
In Example 3 of Patent Document 2, fine silica [Mizukasil (registered trademark) P-801 manufactured by Mizusawa Chemical Industry Co., Ltd.] is used as a filler, and the oil absorption of the fine silica exceeds 200 ml. / 100 g, but the oil absorption amount is still insufficient for the ink in the entire concealing layer, and the rewriting property remains insufficient.
Patent Document 3 describes that a barrier layer is provided between an adhesive layer and a masking layer to prevent ink from bleeding into the masking layer from writing on the masked paper.
かかる構成では、前記バリヤ層を、インクの吸収性に優れた隠蔽層と組み合わせることにより、耐ブリード性と再筆記性とを両立させることができる。
しかしバリヤ層を形成する分、感圧修正テープの製造工程や、製造に要する材料が増加し、生産性が低下する、製造コストが上昇するといった問題を生じる。また、バリヤ層が加わることによって隠蔽層の膜切れ性が低下するおそれもある。
In such a configuration, by combining the barrier layer with a concealing layer having excellent ink absorbability, both bleed resistance and rewriting properties can be achieved.
However, as the barrier layer is formed, the pressure-sensitive correction tape manufacturing process and the materials required for manufacturing increase, resulting in problems such as reduced productivity and increased manufacturing costs. Moreover, there is a possibility that the film breakability of the concealing layer may be reduced due to the addition of the barrier layer.
膜切れ性の低下を防止するため、隠蔽層の厚みを小さくすることも考えられるが、その場合には、当該隠蔽層によって紙面上の筆記等を隠蔽して見えなくする特性、つまり隠蔽性が低下するという問題を生じる。
特許文献４には、隠蔽層のバインダ樹脂として、それ自体がインクの吸収性を有する、酸価３０ｍｇＫＯＨ／ｇ以上のカルボキシル基含有樹脂を用いることが記載されている。
In order to prevent a decrease in film breakage, it is conceivable to reduce the thickness of the concealing layer, but in that case, the concealing layer conceals the writing on the paper surface and makes it invisible, i.e., concealing property. This causes a problem of lowering.
Patent Document 4 describes that a carboxyl group-containing resin having an ink absorptivity and having an acid value of 30 mgKOH / g or more is used as the binder resin for the concealing layer.
隠蔽層の上に筆記したインクを、前記カルボキシル基含有樹脂によって吸収させることで、インクの吸収性と、それによる再筆記性とを向上させることが期待されている。
しかし、前記のように高い酸価をもつ、比較的分子量の小さい樹脂からなる隠蔽層であっても、インクの吸収性は未だ不十分である。その上、隠蔽層の全体が前記樹脂によって形成されてインクの吸収性を有することになるため、耐ブリード性が低くなるという問題もある。また、隠蔽層の上に筆記したインクが隠蔽層の内部に浸透して筆記濃度が低下しやすいという問題も生じる。
It is expected that the ink written on the concealing layer is absorbed by the carboxyl group-containing resin, thereby improving the ink absorbability and the re-writing property thereby.
However, even with a concealing layer made of a resin having a high acid value and a relatively low molecular weight as described above, the ink absorbency is still insufficient. In addition, since the entire concealing layer is made of the resin and has ink absorbability, there is a problem that the bleed resistance is lowered. In addition, there is a problem that the ink written on the masking layer penetrates into the masking layer and the writing density tends to decrease.
本発明の目的は、耐ブリード性や再筆記性に優れる上、浸透による筆記濃度の低下を生じにくく、しかも膜切れ性にも優れた隠蔽層を備えた感圧修正テープを提供することにある。 An object of the present invention is to provide a pressure-sensitive correction tape provided with a concealing layer that is excellent in bleeding resistance and re-writing property, is less likely to cause a decrease in writing concentration due to penetration, and is excellent in film breakage. .
本発明は、離型処理が施された基材の片面に、隠蔽層、および粘着層をこの順に積層した感圧修正テープであって、前記隠蔽層は、白顔料、吸油量２８０ｍｌ／１００ｇ以上、４３０ｍｌ／１００ｇ以下のシリカ、ポリエステル樹脂、およびゴム状樹脂を含むことを特徴とするものである。
本発明によれば、充填剤として、２８０ｍｌ／１００ｇ以上という吸油量の大きいシリカを配合することによって、隠蔽層のインクの吸収性を大幅に向上させて、当該隠蔽層の上の筆記に手で触れたり、紙を重ねてこすり合わせたりした際等に、前記筆記が滲むのを防止し、再筆記性を向上することができる。
The present invention is a pressure-sensitive correction tape in which a concealing layer and an adhesive layer are laminated in this order on one side of a base material that has been subjected to a mold release treatment. The concealing layer comprises a white pigment and an oil absorption of 280 ml / 100 g or more. It contains 430 ml / 100 g or less of silica, polyester resin, and rubber-like resin.
According to the present invention, by adding silica having a large oil absorption amount of 280 ml / 100 g or more as a filler, the ink absorbability of the concealing layer is greatly improved, and writing on the concealing layer is performed manually. It is possible to prevent the writing from spreading when touching or rubbing and stacking paper, and to improve re-writing performance.
ただし吸油量が大きい、すなわち比表面積が大きい多孔質のシリカはバインダ樹脂のバインド力を低下させるため、隠蔽層の膜強度が弱くなって外力によって崩れやすくなるいわゆる易崩壊性が強くなって、例えば紙面上への転写時や、あるいは隠蔽層上に筆記した際等に、当該隠蔽層が粉々に崩れたりしやすくなるという問題を生じる。
また、隠蔽層自体は崩れなくても、前記比表面積の大きい多孔質のシリカは、隠蔽層上に筆記する際の筆圧等によって潰れやすいため、シリカが潰れることで吸油量が小さくなって、隠蔽層の再筆記性が低下する場合もある。
However, porous silica with a large amount of oil absorption, i.e. with a large specific surface area, reduces the binding force of the binder resin, so that the film strength of the concealing layer is weakened and the so-called easy disintegration that easily breaks down due to external force increases, for example There is a problem that the concealing layer is easily broken into pieces when transferred onto a paper surface or when writing on the concealing layer.
Further, even if the hiding layer itself does not collapse, the porous silica having a large specific surface area is easily crushed by the writing pressure when writing on the hiding layer, so that the amount of oil absorption is reduced by crushing the silica, In some cases, the rewriteability of the concealing layer may be reduced.
これに対し本発明によれば、各種バインダ樹脂の中でも特にバインド力や成膜性の強いポリエステル樹脂を、選択的に前記シリカと組み合わせるとともに、前記シリカの吸油量を４３０ｍｌ／１００ｇ以下に制限することによって隠蔽層の易崩壊性を抑制し、膜強度を強めて、例えば紙面上への転写時や隠蔽層上に筆記した際等に、当該隠蔽層が粉々に崩れたりするのを防止することができる。また、隠蔽層上に筆記する際の筆圧等によってシリカが潰れるのを防止して、前記筆記による再筆記性の低下を防止することもできる。 On the other hand, according to the present invention, among various binder resins, a polyester resin having particularly strong binding force and film forming property is selectively combined with the silica, and the oil absorption amount of the silica is limited to 430 ml / 100 g or less. By suppressing the easily disintegrating property of the concealing layer, it is possible to increase the film strength and prevent the concealing layer from being shattered, for example, when transferring onto a paper surface or writing on the concealing layer. it can. Further, it is possible to prevent the silica from being crushed by a writing pressure or the like when writing on the concealing layer, thereby preventing a decrease in rewriting property due to the writing.
しかも、前記のようにバインド力や成膜性の強いポリエステル樹脂は、一般に分子量が大きく、酸価が小さく、そしてインク吸収性が小さいため、隠蔽した紙面上の筆記等からインクが隠蔽層にブリードするのを防止することもできる。すなわち紙面上のインクは、前記ポリエステル樹脂によって阻止されて、紙面との界面から隠蔽層中にブリードすることができない。したがって、前記隠蔽層は耐ブリード性にも優れている。 In addition, as described above, a polyester resin having a strong binding force and film forming property generally has a high molecular weight, a low acid value, and a low ink absorbability. Can also be prevented. That is, the ink on the paper surface is blocked by the polyester resin and cannot bleed into the concealing layer from the interface with the paper surface. Therefore, the concealing layer is also excellent in bleed resistance.
また前記ポリエステル樹脂は、隠蔽層上の筆記等からインクが隠蔽層の内部に浸透して筆記濃度が低下するのを防止する働きもする。すなわち隠蔽層上のインクは、当該隠蔽層の表面に露出した、あるいは前記表面のごく近傍に位置する、前記のように吸油量の大きいシリカによって吸収されるものの、前記シリカの周りを囲むポリエステル樹脂によって阻止されて、そこからさらに隠蔽層の内部へ浸透することはできない。したがって、前記隠蔽層の表面近傍にインクを留めて、筆記濃度の低下を抑制することもできる。 The polyester resin also functions to prevent ink from penetrating into the inside of the hiding layer from writing on the hiding layer and lowering the writing density. That is, the ink on the masking layer is exposed to the surface of the masking layer or located in the vicinity of the surface, and is absorbed by the silica having a large oil absorption as described above, but the polyester resin surrounding the silica. And cannot penetrate further into the cover layer from there. Therefore, ink can be kept near the surface of the concealing layer to suppress a decrease in writing density.
しかも隠蔽層には、前記シリカとゴム状樹脂とを配合しているため、当該隠蔽層の膜切れ性と、柔軟性や基材に対する追従性とを良好にバランスさせることもできる。
したがって本発明によれば、耐ブリード性や再筆記性に優れる上、浸透による筆記濃度の低下を生じにくく、しかも膜切れ性にも優れた隠蔽層を備えた感圧修正テープを提供することができる。
And since the said silica and rubber-like resin are mix | blended with the concealment layer, the film cutting property of the said concealment layer and a softness | flexibility and the followable | trackability with respect to a base material can also be balanced well.
Therefore, according to the present invention, it is possible to provide a pressure-sensitive correction tape provided with a concealing layer that is excellent in bleeding resistance and re-writing property, is less likely to cause a decrease in writing concentration due to penetration, and is excellent in film breakage. it can.
前記ポリエステル樹脂は、引張破断伸度が２５％以下であるのが好ましい。かかる引張破断伸度の小さいポリエステル樹脂を選択的に用いることにより、隠蔽層の膜切れ性をより一層向上することができる。
またポリエステル樹脂は、酸価が５ｍｇＫＯＨ／ｇ以下であるのが好ましい。かかる酸価の小さい、したがって分子量が大きくインク吸収性の小さいポリエステル樹脂を選択的に用いることによって、先に説明したメカニズムによる耐ブリード性をより一層向上するとともに、筆記濃度の低下をより一層確実に防止することができる。
The polyester resin preferably has a tensile elongation at break of 25% or less. By selectively using such a polyester resin having a small tensile elongation at break, the film breakability of the concealing layer can be further improved.
The polyester resin preferably has an acid value of 5 mgKOH / g or less. By selectively using a polyester resin having such a low acid value, and thus a high molecular weight and low ink absorbability, the bleed resistance due to the mechanism described above is further improved, and the decrease in writing density is more reliably ensured. Can be prevented.
また、前記のように分子量が大きく成膜性に優れるとともにバインド力の強いポリエステル樹脂を選択的に用いることによって、隠蔽層の易崩壊性を抑制し、膜強度をさらに強めて、例えば紙面上への転写時や隠蔽層上に筆記した際等に、当該隠蔽層が粉々に崩れたりするのをより一層効果的に防止することができる。また、隠蔽層上に筆記する際の筆圧等によってシリカが潰れるのを防止して、前記筆記による隠蔽層の再筆記性の低下をより一層有効に防止することもできる。 In addition, by selectively using a polyester resin having a large molecular weight and excellent film formability and strong binding force as described above, the easily disintegrating property of the concealing layer is suppressed and the film strength is further increased, for example, on the paper surface. It is possible to more effectively prevent the concealing layer from being broken into pieces, for example, at the time of transfer or when writing on the concealing layer. Further, it is possible to prevent the silica from being crushed by writing pressure or the like when writing on the concealing layer, and to more effectively prevent the rewriting property of the concealing layer due to the writing from being deteriorated.
前記シリカの配合割合は、前記隠蔽層を形成する固形分の総量中の３質量％以上、３５質量％以下であるのが好ましい。これにより、膜強度の低下を抑制しながら、特にゲルインクボールペンのゲルインクに対するインクの吸収性と、それによる再筆記性とを大幅に向上することができる。 The blending ratio of the silica is preferably 3% by mass or more and 35% by mass or less in the total amount of solid content forming the concealing layer. Thereby, while suppressing the fall of film | membrane intensity | strength, especially the absorptivity of the ink with respect to the gel ink of a gel ink ball-point pen, and the rewriting property by it can be improved significantly.
本発明によれば、耐ブリード性や再筆記性に優れる上、浸透による筆記濃度の低下を生じにくく、しかも膜切れ性にも優れた隠蔽層を備えた感圧修正テープを提供することができる。 According to the present invention, it is possible to provide a pressure-sensitive correction tape provided with a concealing layer that is excellent in bleeding resistance and re-writing property, is less likely to cause a decrease in writing concentration due to penetration, and is excellent in film breakage. .
本発明の感圧修正テープは、離型処理が施された基材の片面に、隠蔽層、および粘着層をこの順に積層したものであって、前記隠蔽層は、白顔料、吸油量２８０ｍｌ／１００ｇ以上、４３０ｍｌ／１００ｇ以下のシリカ、ポリエステル樹脂、およびゴム状樹脂を含むことを特徴とするものである。
〈隠蔽層〉
（白顔料）
白顔料としては、隠蔽層に求められる隠蔽性を確保できる種々の白色の顔料がいずれも使用可能であり、特に隠蔽性に優れた酸化チタンが好ましい。また酸化チタンとしては、ルチル型、アナターゼ型等の各種の酸化チタンがいずれも使用可能である。
The pressure-sensitive correction tape of the present invention is obtained by laminating a concealing layer and an adhesive layer in this order on one side of a base material that has been subjected to a release treatment. The concealing layer comprises a white pigment, an oil absorption of 280 ml / It contains 100 g or more and 430 ml / 100 g or less of silica, polyester resin, and rubber-like resin.
<Concealment layer>
(White pigment)
As the white pigment, any of various white pigments that can ensure the concealing property required for the concealing layer can be used, and titanium oxide excellent in concealing property is particularly preferable. As titanium oxide, any of various types of titanium oxide such as rutile type and anatase type can be used.
酸化チタンは、隠蔽層に良好な隠蔽性を付与することを考慮すると、平均粒径が０．１μｍ以上であるのが好ましく、２μｍ以下であるのが好ましい。
また酸化チタンの配合割合は、隠蔽層を形成する固形分の総量中の４０質量％以上、特に５０質量％以上であるのが好ましく、８５質量％以下、特に６５質量％以下であるのが好ましい。
In view of imparting good concealability to the concealing layer, titanium oxide preferably has an average particle size of 0.1 μm or more, and preferably 2 μm or less.
Further, the blending ratio of titanium oxide is preferably 40% by mass or more, particularly preferably 50% by mass or more, and more preferably 85% by mass or less, particularly preferably 65% by mass or less, based on the total amount of solids forming the concealing layer. .
酸化チタンの配合割合が前記範囲未満では、隠蔽層の隠蔽性が不十分になるおそれがある。また前記範囲を超える場合には、相対的に隠蔽層を形成する他の成分の配合割合が不足して、例えばシリカによるインクの吸収性とそれによる再筆記性が低下したり、ポリエステル樹脂による膜強度や耐ブリード性が低下したりするおそれがある。
なお修正の対象が通常は白色の紙であることから、顔料としては前記酸化チタン等の白顔料を用いているが、例えば着色紙等を修正の対象とする場合には、前記白顔料とともに、着色紙の色味に応じた白以外の任意の色の顔料を併用してもよい。
If the blending ratio of titanium oxide is less than the above range, the concealing property of the concealing layer may be insufficient. When the above range is exceeded, the blending ratio of other components that relatively form a concealing layer is insufficient, for example, the absorption of ink by silica and the rewriteability thereby decrease, or the film by polyester resin. The strength and bleed resistance may be reduced.
Since the target of correction is usually white paper, white pigment such as titanium oxide is used as the pigment. For example, when coloring paper or the like is to be corrected, together with the white pigment, You may use together the pigment of arbitrary colors other than white according to the color tone of colored paper.
前記白以外の顔料としては、例えばチタンイエロー、酸化鉄系顔料、群青、コバルトブルー、酸化クロムグリーン、黄鉛、クロムバーミリオン、カドミウムイエロー、カドミウムレッド等の無機顔料、アゾレーキ系、ハンザ系、ベンズイミダゾロン系、モノアゾ系、ピラゾロン系、縮合アゾ系、フタロシアニン系、キナクリドン系、ペリレン系、ジオキサジン系、アントラキノン系、イソインドリノン系等の有機顔料の１種または２種以上が挙げられる。 Examples of the pigment other than white include, for example, inorganic pigments such as titanium yellow, iron oxide pigments, ultramarine, cobalt blue, chromium oxide green, yellow lead, chromium vermilion, cadmium yellow, cadmium red, azo lakes, hansa, benz Examples thereof include one or more organic pigments such as imidazolone, monoazo, pyrazolone, condensed azo, phthalocyanine, quinacridone, perylene, dioxazine, anthraquinone, and isoindolinone.
また、白顔料に加えてアルミニウム粉末、銅粉末、真鍮粉末、染料等の色彩調整剤を配合してもよい。
白顔料以外の他の顔料や色彩調整剤は、隠蔽層に求められる色味等に応じて任意の割合で配合することができる。ただし白顔料と、他の顔料や色彩調整剤とを併用する場合は、その合計の配合割合を、隠蔽層を形成する固形分の総量中の８５質量％以下とするのが、隠蔽層としての前記各種の機能を維持する上で好ましい。
In addition to the white pigment, a color adjusting agent such as an aluminum powder, a copper powder, a brass powder, or a dye may be blended.
Other pigments and color adjusting agents other than the white pigment can be blended in an arbitrary ratio according to the color required for the masking layer. However, when a white pigment is used in combination with another pigment or a color adjusting agent, the total blending ratio is 85% by mass or less based on the total amount of solids forming the concealing layer. It is preferable for maintaining the various functions.
（シリカ）
シリカとしては、その製造方法によって分類される乾式法シリカ（燃焼法シリカ、アーク法シリカ等）、湿式法シリカ（沈降法シリカ、ゲル法シリカ等）のうち、前述した日本工業規格ＪＩＳ Ｋ５１０１−１３−１：２００４「顔料試験方法−第１３部：吸油量−第１節：精製あまに油法」に則って測定された吸油量が２８０ｍｌ／１００ｇ以上、４３０ｍｌ／１００ｇ以下であるシリカが、いずれも使用可能である。
(silica)
As silica, among the dry method silica (combustion method silica, arc method silica, etc.) and the wet method silica (precipitation method silica, gel method silica, etc.) classified according to the production method, the aforementioned Japanese Industrial Standard JIS K5101-13 is used. −1: 2004 “Pigment Test Method—Part 13: Oil Absorption—Section 1: Refined Sesame Oil Method” The oil absorption measured in accordance with 280 ml / 100 g or more and 430 ml / 100 g or less Can also be used.
シリカの吸油量が前記範囲内に限定されるのは、前記範囲未満では、隠蔽層のインクの吸収性を高める効果が得られず、当該隠蔽層の上の筆記に手で触れたり、紙を重ねてこすり合わせたりした際等に前記筆記が滲むのを防止できず、再筆記性が低下するためである。
また、シリカの吸油量が前記範囲を超える場合には、バインダ樹脂としてポリエステル樹脂を使用しているにも拘らず、そのバインド力が低下して、隠蔽層の易崩壊性が強くなり、膜強度が低下して、例えば紙面上への転写時や、あるいは隠蔽層上に筆記した際等に、当該隠蔽層が粉々に崩れたりしやすくなるためである。また前記シリカが、例えば隠蔽層上に筆記する際の筆圧等によって潰れやすく、潰れると却って再筆記性が低下するためである。
The silica oil absorption amount is limited to the above range. If the silica absorption amount is less than the above range, the effect of enhancing the ink absorption of the masking layer cannot be obtained. This is because it is not possible to prevent the writing from spreading when it is rubbed repeatedly, and the rewriting property is deteriorated.
Further, when the oil absorption of the silica exceeds the above range, despite using a polyester resin as a binder resin, the by binding force decreases, easily disintegrating hiding layer becomes strong, the film strength This is because the concealing layer is easily broken into pieces when it is transferred onto a paper surface or when writing on the concealing layer. Further, the silica is easily crushed by, for example, writing pressure when writing on the concealing layer, and when it is crushed, the re-writing property is lowered.
これに対し、吸油量が前記範囲内のシリカを選択的に用いることにより、バインダ樹脂としてポリエステル樹脂を選択的に使用することと相まって、耐ブリード性や再筆記性に優れる上、浸透による筆記濃度の低下を生じにくく、しかも膜強度や膜切れ性にも優れた隠蔽層を形成することが可能となる。
なお、隠蔽層のインク吸収性をさらに良くして、当該隠蔽層の再筆記性をより一層向上することを考慮すると、シリカの吸油量は、前記範囲内でも３００ｍｌ／１００ｇ以上であるのが好ましい。
On the other hand, by selectively using silica having an oil absorption amount within the above range, coupled with the selective use of a polyester resin as a binder resin, it has excellent bleed resistance and rewriteability, and writing density due to penetration. It is possible to form a concealing layer that is less likely to cause a decrease in film thickness and that is excellent in film strength and film breakability.
In consideration of further improving the ink absorbability of the masking layer and further improving the rewriting property of the masking layer, the oil absorption amount of silica is preferably 300 ml / 100 g or more even within the above range. .
また、できるだけ易崩壊性が弱く膜強度に優れた隠蔽層を形成することや、当該隠蔽層上に筆記する際の筆圧等によってシリカが潰れるのを防止して、再筆記性が低下しにくい隠蔽層を形成すること等を考慮すると、シリカの吸油量は、前記範囲内でも４００ｍｌ／１００ｇ以下であるのが好ましい。
シリカは、充填剤として機能して隠蔽層に良好な膜切れ性を付与するために、平均粒径が０．５μｍ以上、特に１μｍ以上であるのが好ましい。ただし平均粒径が大きすぎる場合には、隠蔽層の表面の平滑性が低下して、当該隠蔽層の表面に筆記する妨げとなったり、隠蔽層の膜切れ性が強くなりすぎて紙面上への転写時にひび割れを生じたりするおそれがある。そのためシリカの平均粒径は、前記範囲内でも２０μｍ以下、特に１５μｍ以下であるのが好ましい。
In addition, forming a concealing layer that is as easily disintegrable as possible and excellent in film strength, and prevents silica from being crushed by writing pressure when writing on the concealing layer, so that the re-writing property is unlikely to deteriorate. Considering the formation of a concealing layer, the oil absorption of silica is preferably 400 ml / 100 g or less even within the above range.
Silica preferably has an average particle size of 0.5 μm or more, particularly 1 μm or more in order to function as a filler and impart good film cutting properties to the concealing layer. However, if the average particle size is too large, the smoothness of the surface of the concealing layer will be reduced, hindering writing on the surface of the concealing layer, or the film breakability of the concealing layer will be too strong and onto the paper surface. There is a risk of cracking during transfer. Therefore, the average particle diameter of silica is preferably 20 μm or less, particularly preferably 15 μm or less even within the above range.
シリカの配合割合は、隠蔽層を形成する固形分の総量中の３質量％以上、特に５質量％以上であるのが好ましく、３５質量％以下、特に３０質量％以下であるのが好ましい。
シリカの配合割合が前記範囲未満では、隠蔽層のインクの吸収性を向上して再筆記性を向上する効果が十分に得られないおそれがある。また、隠蔽層の膜切れ性が低下するおそれもある。
The blending ratio of silica is preferably 3% by mass or more, particularly 5% by mass or more, and preferably 35% by mass or less, particularly preferably 30% by mass or less, based on the total amount of solids forming the concealing layer.
If the blending ratio of silica is less than the above range, the effect of improving the rewriting property by improving the ink absorbability of the concealing layer may not be sufficiently obtained. Moreover, there is a possibility that the film cutting property of the concealing layer is lowered.
一方、前記範囲を超える場合には、バインダ樹脂としてポリエステル樹脂を使用しているにも拘らず、そのバインド力が低下して、隠蔽層の易崩壊性が強くなり、膜強度が低下して、例えば紙面上への転写時や、あるいは隠蔽層上に筆記した際等に、当該隠蔽層が粉々に崩れたりしやすくなるおそれがある。また前記シリカが、例えば隠蔽層上に筆記する際の筆圧等によって潰れやすく、潰れると却って再筆記性が低下する。
これに対し、シリカの配合割合を前記範囲内とすることで、膜強度の低下を抑制しながら、特にゲルインクボールペンのゲルインクに対するインクの吸収性と、それによる再筆記性とを大幅に向上することができる。
On the other hand, when exceeding the above range, despite using a polyester resin as a binder resin, the binding force is reduced, the easily disintegrating property of the concealing layer is increased, the film strength is reduced, For example, there is a possibility that the concealing layer is easily broken into pieces when being transferred onto the paper surface or when writing on the concealing layer. Further, the silica is easily crushed by, for example, writing pressure when writing on the concealing layer.
On the other hand, by making the blending ratio of silica within the above range, it is possible to greatly improve the ink absorbability with respect to the gel ink of the gel ink ballpoint pen and the rewriteability thereby, while suppressing the decrease in the film strength. Can do.
（ポリエステル樹脂）
ポリエステル樹脂としては、隠蔽層のもとになる塗布液中に含まれる溶剤に良好に溶解または分散して、できるだけ均一な塗布液を形成できる上、特に非硬化、高分子量型で、酸価が小さく、隠蔽層の易崩壊性を抑制して膜強度を強めたり、前記隠蔽層に良好な耐ブリード性を付与したりできる種々のポリエステル樹脂がいずれも使用可能である。
(Polyester resin)
As a polyester resin, it can be dissolved or dispersed well in a solvent contained in a coating solution that becomes a concealing layer to form a uniform coating solution as much as possible. Any of various polyester resins that are small and capable of suppressing the easily disintegrating property of the masking layer to increase the film strength or imparting good bleeding resistance to the masking layer can be used.
中でもポリエステル樹脂としては、ＡＳＴＭ Ｄ６３８に準拠して測定した２３℃での引張破断伸度が２５％以下、中でも１０％以下、特に５％以下であるものを用いるのが好ましい。かかる引張破断伸度の小さいポリエステル樹脂を選択的に用いることにより、隠蔽層の膜切れ性をより一層向上することができる。
ただし、ポリエステル樹脂の引張破断伸度が小さすぎると、隠蔽層の膜切れ性が強くなりすぎて紙面上への転写時にひび割れを生じたりするおそれがあるため、前記引張破断伸度は、前記範囲内でも２％以上、特に３％以上であるのが好ましい。
Among them, it is preferable to use a polyester resin having a tensile elongation at break at 25 ° C. of 25% or less, particularly 10% or less, particularly 5% or less as measured in accordance with ASTM D638. By selectively using such a polyester resin having a small tensile elongation at break, the film breakability of the concealing layer can be further improved.
However, if the tensile breaking elongation of the polyester resin is too small, the film breakability of the concealing layer becomes too strong, and there is a possibility of causing cracks during transfer onto the paper surface. Of these, 2% or more, particularly 3% or more is preferable.
またポリエステル樹脂としては、酸価が５ｍｇＫＯＨ／ｇ以下、特に３ｍｇＫＯＨ／ｇ以下であるものを用いるのが好ましい。かかる酸価の小さい、したがって分子量が大きくインク吸収性の小さいポリエステル樹脂を選択的に用いることによって、先に説明したメカニズムによる耐ブリード性をより一層向上するとともに、筆記濃度の低下をより一層確実に防止することができる。 As the polyester resin, it is preferable to use a polyester resin having an acid value of 5 mgKOH / g or less, particularly 3 mgKOH / g or less. By selectively using a polyester resin having such a low acid value, and thus a high molecular weight and low ink absorbability, the bleed resistance due to the mechanism described above is further improved, and the decrease in writing density is more reliably ensured. Can be prevented.
また、前記のように分子量が大きく成膜性に優れるとともにバインド力の強いポリエステル樹脂を選択的に用いることによって、隠蔽層の易崩壊性を抑制し、膜強度をさらに強めて、例えば紙面上への転写時や隠蔽層上に筆記した際等に、当該隠蔽層が粉々に崩れたりするのをより一層効果的に防止することができる。また、隠蔽層上に筆記する際の筆圧等によってシリカが潰れるのを防止して、前記筆記による隠蔽層の再筆記性の低下をより一層有効に防止することもできる。 In addition, by selectively using a polyester resin having a large molecular weight and excellent film formability and strong binding force as described above, the easily disintegrating property of the concealing layer is suppressed and the film strength is further increased, for example, on the paper surface. It is possible to more effectively prevent the concealing layer from being broken into pieces, for example, at the time of transfer or when writing on the concealing layer. Further, it is possible to prevent the silica from being crushed by writing pressure or the like when writing on the concealing layer, and to more effectively prevent the rewriting property of the concealing layer due to the writing from being deteriorated.
ただし、ポリエステル樹脂の酸価が小さすぎると、溶剤への溶解性、分散性が低下して均一な塗布液を形成できないおそれがあるため、前記酸価は、１ｍｇＫＯＨ／ｇ以上であるのが好ましい。
ポリエステル樹脂の配合割合は、隠蔽層を形成する固形分の総量中の１質量％以上、特に２質量％以上であるのが好ましく、１５質量％以下、特に１０質量％以下であるのが好ましい。
However, if the acid value of the polyester resin is too small, the solubility and dispersibility in the solvent may decrease and a uniform coating solution may not be formed. Therefore, the acid value is preferably 1 mgKOH / g or more. .
The blending ratio of the polyester resin is preferably 1% by mass or more, particularly 2% by mass or more, and more preferably 15% by mass or less, and particularly preferably 10% by mass or less, based on the total amount of solids forming the concealing layer.
ポリエステル樹脂の配合割合が前記範囲未満では、当該ポリエステル樹脂によるバインド力が低下して、隠蔽層の易崩壊性が強くなり、膜強度が低下して、例えば紙面上への転写時や、あるいは隠蔽層上に筆記した際等に、当該隠蔽層が粉々に崩れたりしやすくなるおそれがある。また耐ブリード性や筆記濃度が低下するおそれがある。
一方、前記範囲を超える場合には、相対的にゴム状樹脂の配合割合が少なくなるため、隠蔽層の柔軟性や基材に対する追従性が低下するおそれがある。また相対的にシリカの配合割合が少なくなるため、隠蔽層のインクの吸収性を向上して再筆記性を向上する効果が十分に得られないおそれがある。また、相対的に白顔料の配合割合が少なくなって、隠蔽層の隠蔽性が低下するおそれもある。
When the blending ratio of the polyester resin is less than the above range, the binding force due to the polyester resin is reduced, the hiding layer is easily disintegrated, and the film strength is lowered, for example, when transferring to the paper surface or hiding. When writing on the layer, the concealing layer may be easily broken. In addition, bleeding resistance and writing density may be reduced.
On the other hand, when the above range is exceeded, since the blending ratio of the rubber-like resin is relatively reduced, the flexibility of the concealing layer and the followability to the substrate may be reduced. Further, since the proportion of silica is relatively reduced, there is a possibility that the effect of improving the rewriting property by improving the ink absorbability of the concealing layer may not be obtained sufficiently. Moreover, there is a possibility that the concealing property of the concealing layer is lowered due to a relatively small proportion of white pigment.
（ゴム状樹脂）
ゴム状樹脂としては、隠蔽層のもとになる塗布液中に含まれる溶剤に良好に溶解または分散して、できるだけ均一な塗布液を形成できる上、隠蔽層の膜切れ性と、柔軟性や基材に対する追従性とを良好にバランスさせることができる種々のゴム状樹脂がいずれも使用可能である。
(Rubber resin)
As a rubber-like resin, it can be dissolved or dispersed well in a solvent contained in the coating solution that is the basis of the concealing layer to form a coating solution that is as uniform as possible. Any of various rubber-like resins capable of satisfactorily balancing the followability to the substrate can be used.
かかるゴム状樹脂としては、例えばＳＥＢＳブロック共重合体、スチレン−ブタジエン−スチレン（ＳＢＳ）ブロック共重合体、スチレン−イソプレン−スチレン（ＳＩＳ）ブロック共重合体、スチレン−ブタジエン共重合体、ウレタンゴム、アクリロニトリル−ブタジエン共重合体、エチレン−酢酸ビニル共重合体、エチレン−エチルアクリレート共重合体、クロロスルホン化ポリエチレン、環化ゴム等の１種または２種以上が挙げられる。 Examples of the rubber-like resin include SEBS block copolymer, styrene-butadiene-styrene (SBS) block copolymer, styrene-isoprene-styrene (SIS) block copolymer, styrene-butadiene copolymer, urethane rubber, Examples thereof include one or more of acrylonitrile-butadiene copolymer, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, chlorosulfonated polyethylene, cyclized rubber and the like.
なおゴム状樹脂としては、プロセスオイルを加えて柔軟性を高めた油展タイプのものと、非油展タイプのものとがあるが、このいずれを使用してもよい。
ゴム状樹脂の配合割合は、隠蔽層の膜切れ性と、柔軟性や基材に対する追従性とを良好にバランスさせることを考慮すると、隠蔽層を形成する固形分の総量中の３質量％以上、特に５質量％以上であるのが好ましく、１５質量％以下、特に１２質量％以下であるのが好ましい。
The rubbery resin includes an oil-extended type in which flexibility is increased by adding process oil and a non-oil-extended type, and any of these may be used.
The blending ratio of the rubber-like resin is 3% by mass or more based on the total amount of solids forming the concealing layer in consideration of a good balance between the film breakability of the concealing layer and flexibility and followability to the substrate. In particular, it is preferably 5% by mass or more, more preferably 15% by mass or less, and particularly preferably 12% by mass or less.
（その他の成分）
隠蔽層には、例えば膜切れ性の向上を目的として、隠蔽層を脆くする機能をする炭化水素樹脂や、あるいは炭酸マグネシウム、炭酸カルシウム、炭酸バリウム、酸化アルミニウム、二酸化ケイ素、セライト、クレー、タルク等の体質顔料等の１種または２種以上を配合してもよい。
このうち体質顔料の配合割合は、隠蔽層を形成する固形分の総量中の２質量％以上であるのが好ましく、３０質量％以下、特に２５質量％以下であるのが好ましい。
(Other ingredients)
For the concealing layer, for example, a hydrocarbon resin that functions to make the concealing layer brittle, or magnesium carbonate, calcium carbonate, barium carbonate, aluminum oxide, silicon dioxide, celite, clay, talc, etc. You may mix | blend 1 type (s) or 2 or more types, such as said extender pigment.
Among these, the proportion of the extender pigment is preferably 2% by mass or more, preferably 30% by mass or less, and particularly preferably 25% by mass or less, based on the total amount of solids forming the concealing layer.
隠蔽層は、前記各成分を任意の溶剤に溶解または分散させた塗布液を、離型処理を施した基材の片面に塗布し、乾燥させて形成することができる。
隠蔽層の厚みは１０μｍ以上、特に１５μｍ以上であるのが好ましく、５０μｍ以下、特に４０μｍ以下であるのが好ましい。
隠蔽層の厚みが前記範囲未満では、当該隠蔽層による隠蔽性が十分に得られないおそれがあり、前記範囲を超える場合には、隠蔽層の膜切れ性が低下するおそれがある。
The concealing layer can be formed by applying a coating solution obtained by dissolving or dispersing each of the above components in an arbitrary solvent to one side of a base material that has been subjected to a release treatment and then drying it.
The thickness of the concealing layer is preferably 10 μm or more, particularly preferably 15 μm or more, and is preferably 50 μm or less, particularly preferably 40 μm or less.
If the thickness of the concealing layer is less than the above range, the concealing property by the concealing layer may not be sufficiently obtained, and if it exceeds the above range, the film breakability of the concealing layer may be deteriorated.
〈基材〉
基材としては、例えばプラスチックフィルムや紙、金属箔等の種々の基材が使用可能である。
このうちプラスチックフィルムとしては、例えばポリエチレンテレフタレート（ＰＥＴ）、ポリエチレンナフタレート等のポリエステル樹脂、ポリカーボネート樹脂、ポリプロピレン等のポリオレフィン樹脂、ポリアクリル系樹脂、ポリスチレン系樹脂等からなる厚み３μｍ以上、５０μｍ以下程度のフィルムが挙げられる。
<Base material>
As a base material, various base materials, such as a plastic film, paper, and metal foil, can be used, for example.
Among these, as a plastic film, for example, a polyester resin such as polyethylene terephthalate (PET) and polyethylene naphthalate, a polycarbonate resin, a polyolefin resin such as polypropylene, a polyacrylic resin, a polystyrene resin and the like having a thickness of about 3 μm to about 50 μm. A film is mentioned.
また紙としては、例えば坪量が３０ｇ／ｍ２以上、６０ｇ／ｍ２以下程度のグラシン紙などの薄葉紙が挙げられる。
さらに金属箔としては、例えばアルミニウム、亜鉛、黄銅、銅等の箔が挙げられる。また金属箔とプラスチックフィルムのラミネートフィルムも使用可能である。
前記基材は、紙面上への転写時の隠蔽層の離型性を高めるために、当該隠蔽層、および粘着層をこの順に積層する側の表面が、離型処理されている必要がある。
Examples of the paper include thin paper such as glassine paper having a basis weight of about 30 g / m 2 or more and 60 g / m 2 or less.
Furthermore, as metal foil, foils, such as aluminum, zinc, brass, copper, are mentioned, for example. A laminated film of metal foil and plastic film can also be used.
In order to improve the releasability of the concealing layer at the time of transfer onto the paper surface, the surface of the substrate on which the concealing layer and the adhesive layer are laminated in this order needs to be subjected to a releasing treatment.
また基材は、先に説明したように感圧修正テープをロール状に捲回した状態で、基材の、前記隠蔽層、および粘着層を積層した側と反対側の表面に粘着層が粘着して、前記感圧修正テープをロールから繰り出した際に隠蔽層が離型するのを防止するために、当該反対側の面も、やはり離型処理されている必要がある。
離型処理としては、前記基材の表面を、例えばシリコーン系樹脂、フッ素系樹脂、ポリオレフィン系樹脂等の離型性を有する樹脂からなる、あるいは前記樹脂を含む離型層で被覆すればよい。なお基材の両面を同じ離型層で被覆してもよいし、必要に応じて互いに異なる離型層で被覆してもよい。
In addition, as described above, the pressure-sensitive correction tape is wound in a roll shape, and the pressure-sensitive adhesive layer adheres to the surface of the base material opposite to the side on which the concealing layer and the pressure-sensitive adhesive layer are laminated. Then, in order to prevent the concealing layer from being released when the pressure-sensitive correction tape is unwound from the roll, the opposite surface also needs to be subjected to the release treatment.
As the release treatment, the surface of the substrate may be covered with a release layer made of a resin having release properties such as a silicone resin, a fluorine resin, a polyolefin resin, or the like, or containing the resin. In addition, you may coat | cover both surfaces of a base material with the same release layer, and may coat | cover with a mutually different release layer as needed.
離型層の厚みは０．０５μｍ以上、中でも０．０８μｍ以上、特に０．１μｍ以上であるのが好ましく、３μｍ以下、中でも１．５μｍ以下、特に１μｍ以下であるのが好ましい。なお離型層の厚みは、基材の両面で同じでも異なっていてもよい。
また基材の全体を、前記離型性の樹脂で形成して離型層を省略してもよい。本発明で言うところの「両面に離型処理が施された基材」には、かかる離型性の樹脂からなる基材をも含むこととする。
The thickness of the release layer is 0.05 μm or more, preferably 0.08 μm or more, particularly preferably 0.1 μm or more, preferably 3 μm or less, particularly 1.5 μm or less, particularly preferably 1 μm or less. The thickness of the release layer may be the same or different on both surfaces of the substrate.
Further, the entire base material may be formed of the releasable resin and the release layer may be omitted. In the present invention, the “base material subjected to the release treatment on both surfaces” includes a base material made of such a releasable resin.
〈粘着層〉
粘着層としては、従来公知の種々の粘着剤を主成分とする任意の粘着層が挙げられる。
前記粘着剤としては、例えばアクリル系、ロジン系、ゴム系、ビニルエーテル系、ポリイソブチレン系等の粘着剤の１種または２種以上が挙げられる。
粘着層は、前記粘着剤に、必要に応じて接着力調整剤等の各種添加剤や有機または無機の微粒子等を配合した塗布液を、隠蔽層の上に塗布し、乾燥させて形成することができる。
<Adhesive layer>
As the adhesive layer, any adhesive layer mainly composed of conventionally known various pressure-sensitive agents.
Examples of the pressure-sensitive adhesive include one or more pressure-sensitive adhesives such as acrylic, rosin, rubber, vinyl ether, and polyisobutylene.
The pressure-sensitive adhesive layer is formed by applying a coating liquid containing various additives such as an adhesive force adjusting agent and organic or inorganic fine particles to the pressure-sensitive adhesive, if necessary, and drying it. Can do.
粘着層用の塗布液としては、下地である隠蔽層に影響を及ぼしたりしないために、前記各成分を、水を主体とする水性溶媒中に溶解または分散させた水性溶液または水性分散液を用いるのが好ましい。
粘着層の厚みは０．５μｍ以上、特に１μｍ以上であるのが好ましく、５μｍ以下、特に４μｍ以下であるのが好ましい。
As the coating solution for the pressure-sensitive adhesive layer, an aqueous solution or an aqueous dispersion in which the above-described components are dissolved or dispersed in an aqueous solvent mainly containing water is used so as not to affect the concealing layer as a base. Is preferred.
The thickness of the adhesive layer is preferably 0.5 μm or more, particularly preferably 1 μm or more, and is preferably 5 μm or less, particularly 4 μm or less.
前記各層を含む本発明の感圧修正テープは、隠蔽層に配合した、前記特定の吸油量を有するシリカと、バインダ樹脂としてのポリエステル樹脂との併用の効果によって、前記隠蔽層が、耐ブリード性や再筆記性に優れる上、浸透による筆記濃度の低下を生じにくく、しかも膜切れ性にも優れているという特有の効果を奏する。 The pressure-sensitive correction tape of the present invention including each of the above layers is a bleed-proofing effect due to the combined effect of the silica having the specific oil absorption and the polyester resin as the binder resin blended in the concealing layer. In addition to being excellent in re-writing property, it has a unique effect that it is less likely to cause a decrease in writing concentration due to permeation, and it is also excellent in film breakability.
〈実施例１〉
（隠蔽層用の塗布液の調製）
酸化チタン〔ルチル型、平均粒径：０．２４μｍ〕２０質量部、吸油量３５０ｍｌ／１００ｇのシリカ１０質量部、ポリエステル樹脂〔引張破断伸度：４％、引張破断強度：６０．８ＭＰａ、酸価：２ｍｇＫＯＨ／ｇ、分子量：２００００〕３質量部、およびＳＥＢＳブロック共重合体３質量部を、トルエン６４質量部に加え、混合して隠蔽層用の塗布液を調製した。
<Example 1>
(Preparation of coating solution for hiding layer)
20 parts by mass of titanium oxide [rutile type, average particle size: 0.24 μm], 10 parts by mass of silica having an oil absorption of 350 ml / 100 g, polyester resin [tensile elongation at break: 4%, tensile strength at break: 60.8 MPa, acid value : 2 mg KOH / g, molecular weight: 20000] 3 parts by mass and 3 parts by mass of SEBS block copolymer were added to 64 parts by mass of toluene and mixed to prepare a coating solution for a concealing layer.
（感圧修正テープの製造）
基材として厚み１２μｍのＰＥＴフィルムを用い、その両面に互いに異なるシリコーン系樹脂を含む離型剤を塗布し、乾燥させて、それぞれ厚み０．３μｍの離型層を形成した。
次いで、前記基材の片面の離型層上に、先に調製した隠蔽層用の塗布液を塗布し、乾燥させて厚み２０μｍの隠蔽層を形成したのち、アクリル系粘着剤を含む粘着層用の塗布液を塗布し、乾燥させて厚み２μｍの粘着層を形成した。
(Manufacture of pressure-sensitive correction tape)
A PET film having a thickness of 12 μm was used as a base material, and release agents containing different silicone resins were applied to both surfaces thereof and dried to form release layers having a thickness of 0.3 μm.
Next, the coating solution for the concealing layer prepared above is applied onto the release layer on one side of the base material, and after drying to form a concealing layer having a thickness of 20 μm, the adhesive layer containing an acrylic adhesive is used. The coating solution was applied and dried to form an adhesive layer having a thickness of 2 μm.
そして基材を幅６ｍｍにスリットして感圧修正テープを製造するとともに、かかる感圧修正テープを５ｍずつ、転写具〔ゼネラル(株)製の消し太郎（登録商標）〕用のコアにロール状に巻き取った。
前記シリカの配合割合は、隠蔽層を形成する固形分の総量中の２７．８質量％であった。
〈実施例２〉
吸油量が３００ｍｌ／１００ｇのシリカを同量、配合したこと以外は実施例１と同様にして隠蔽層用の塗布液を調製し、感圧修正テープを製造するとともに、当該感圧修正テープをロール状に巻き取った。
シリカの配合割合は、隠蔽層を形成する固形分の総量中の２７．８質量％であった。
The base material is then slit into a width of 6 mm to produce a pressure-sensitive correction tape, and the pressure-sensitive correction tape is rolled into a core for a transfer tool (General Taro (registered trademark) manufactured by General Co., Ltd.) in 5 m increments. Rolled up.
The mixing ratio of the silica was 27.8% by mass in the total amount of the solid content forming the concealing layer.
<Example 2>
A coating solution for the concealing layer was prepared in the same manner as in Example 1 except that the same amount and amount of silica having an oil absorption amount of 300 ml / 100 g was mixed, and a pressure-sensitive correction tape was produced and the pressure-sensitive correction tape was rolled. It was wound up into a shape.
The blending ratio of silica was 27.8% by mass in the total amount of solids forming the concealing layer.
〈実施例３〉
吸油量が４００ｍｌ／１００ｇのシリカを同量、配合したこと以外は実施例１と同様にして隠蔽層用の塗布液を調製し、感圧修正テープを製造するとともに、当該感圧修正テープをロール状に巻き取った。
シリカの配合割合は、隠蔽層を形成する固形分の総量中の２７．８質量％であった。
〈実施例４〉
吸油量が４３０ｍｌ／１００ｇのシリカを同量、配合したこと以外は実施例１と同様にして隠蔽層用の塗布液を調製し、感圧修正テープを製造するとともに、当該感圧修正テープをロール状に巻き取った。
シリカの配合割合は、隠蔽層を形成する固形分の総量中の２７．８質量％であった。
<Example 3>
A coating solution for the concealing layer was prepared in the same manner as in Example 1 except that the same amount and quantity of silica having an oil absorption of 400 ml / 100 g was mixed, and a pressure-sensitive correction tape was produced and the pressure-sensitive correction tape was rolled. It was wound up into a shape.
The blending ratio of silica was 27.8% by mass in the total amount of solids forming the concealing layer.
<Example 4>
A coating solution for the concealing layer was prepared in the same manner as in Example 1 except that the same amount and amount of silica having an oil absorption amount of 430 ml / 100 g was mixed, and a pressure-sensitive correction tape was produced and the pressure-sensitive correction tape was rolled. It was wound up into a shape.
The blending ratio of silica was 27.8% by mass in the total amount of solids forming the concealing layer.
〈実施例５〉
吸油量が２８０ｍｌ／１００ｇのシリカを同量、配合したこと以外は実施例１と同様にして隠蔽層用の塗布液を調製し、感圧修正テープを製造するとともに、当該感圧修正テープをロール状に巻き取った。
シリカの配合割合は、隠蔽層を形成する固形分の総量中の２７．８質量％であった。
<Example 5>
A coating solution for the concealing layer was prepared in the same manner as in Example 1 except that the same amount and amount of silica having an oil absorption of 280 ml / 100 g was mixed, and a pressure-sensitive correction tape was produced and the pressure-sensitive correction tape was rolled. It was wound up into a shape.
The blending ratio of silica was 27.8% by mass in the total amount of solids forming the concealing layer.
〈実施例６〉
シリカの量を１．０８質量部とし、かつ炭酸カルシウム８．９２質量部をさらに配合したこと以外は実施例１と同様にして隠蔽層用の塗布液を調製し、感圧修正テープを製造するとともに、当該感圧修正テープをロール状に巻き取った。
シリカの配合割合は、隠蔽層を形成する固形分の総量中の３質量％であった。
<Example 6>
A coating solution for the concealing layer is prepared in the same manner as in Example 1 except that the amount of silica is 1.08 parts by mass and 8.92 parts by mass of calcium carbonate is further blended to produce a pressure-sensitive correction tape. At the same time, the pressure-sensitive correction tape was rolled up.
The compounding ratio of silica was 3% by mass in the total amount of solids forming the concealing layer.
〈実施例７〉
シリカの量を１．８質量部とし、かつ炭酸カルシウム８．２質量部をさらに配合したこと以外は実施例１と同様にして隠蔽層用の塗布液を調製し、感圧修正テープを製造するとともに、当該感圧修正テープをロール状に巻き取った。
シリカの配合割合は、隠蔽層を形成する固形分の総量中の５質量％であった。
<Example 7>
A coating solution for the concealing layer is prepared in the same manner as in Example 1 except that the amount of silica is 1.8 parts by mass and 8.2 parts by mass of calcium carbonate is further blended to produce a pressure-sensitive correction tape. At the same time, the pressure-sensitive correction tape was rolled up.
The mixing ratio of silica was 5% by mass in the total amount of solids forming the concealing layer.
〈実施例８〉
シリカの量を１０．８質量部とし、かつ酸化チタンの量を１９．２質量部としたこと以外は実施例１と同様にして隠蔽層用の塗布液を調製し、感圧修正テープを製造するとともに、当該感圧修正テープをロール状に巻き取った。
シリカの配合割合は、隠蔽層を形成する固形分の総量中の３０質量％であった。
<Example 8>
A coating solution for the concealment layer was prepared in the same manner as in Example 1 except that the amount of silica was 10.8 parts by mass and the amount of titanium oxide was 19.2 parts by mass, and a pressure-sensitive correction tape was produced. At the same time, the pressure-sensitive correction tape was wound into a roll.
The compounding ratio of silica was 30% by mass in the total amount of solids forming the concealing layer.
〈実施例９〉
シリカの量を１２．６質量部とし、かつ酸化チタンの量を１７．４質量部としたこと以外は実施例１と同様にして隠蔽層用の塗布液を調製し、感圧修正テープを製造するとともに、当該感圧修正テープをロール状に巻き取った。
シリカの配合割合は、隠蔽層を形成する固形分の総量中の３５質量％であった。
<Example 9>
A coating solution for the concealing layer was prepared in the same manner as in Example 1 except that the amount of silica was 12.6 parts by mass and the amount of titanium oxide was 17.4 parts by mass, and a pressure-sensitive correction tape was produced. At the same time, the pressure-sensitive correction tape was wound into a roll.
The mixing ratio of silica was 35% by mass in the total amount of solids forming the concealing layer.
〈実施例１０〉
引張破断伸度が２５％、酸価が１ｍｇＫＯＨ／ｇであるポリエステル樹脂〔引張破断強度：４４．１ＭＰａ、分子量：１８０００〕を同量、配合したこと以外は実施例１と同様にして隠蔽層用の塗布液を調製し、感圧修正テープを製造するとともに、当該感圧修正テープをロール状に巻き取った。
シリカの配合割合は、隠蔽層を形成する固形分の総量中の２７．８質量％であった。
<Example 10>
For concealment layer in the same manner as in Example 1, except that the same amount of polyester resin (tensile breaking strength: 44.1 MPa, molecular weight: 18000) having a tensile elongation at break of 25% and an acid value of 1 mg KOH / g was blended. The coating solution was prepared to produce a pressure-sensitive correction tape, and the pressure-sensitive correction tape was wound into a roll.
The blending ratio of silica was 27.8% by mass in the total amount of solids forming the concealing layer.
〈実施例１１〉
引張破断伸度が３５％、酸価が２ｍｇＫＯＨ／ｇであるポリエステル樹脂〔引張破断強度：２９．４ＭＰａ、分子量：２００００〕を同量、配合したこと以外は実施例１と同様にして隠蔽層用の塗布液を調製し、感圧修正テープを製造するとともに、当該感圧修正テープをロール状に巻き取った。
シリカの配合割合は、隠蔽層を形成する固形分の総量中の２７．８質量％であった。
<Example 11>
For concealment layer in the same manner as in Example 1 except that the same amount of polyester resin (tensile breaking strength: 29.4 MPa, molecular weight: 20000) having a tensile elongation at break of 35% and an acid value of 2 mg KOH / g was blended. The coating solution was prepared to produce a pressure-sensitive correction tape, and the pressure-sensitive correction tape was wound into a roll.
The blending ratio of silica was 27.8% by mass in the total amount of solids forming the concealing layer.
〈実施例１２〉
引張破断伸度が１０％、酸価が３ｍｇＫＯＨ／ｇであるポリエステル樹脂〔引張破断強度：４０ＭＰａ、分子量：２００００〕を同量、配合したこと以外は実施例１と同様にして隠蔽層用の塗布液を調製し、感圧修正テープを製造するとともに、当該感圧修正テープをロール状に巻き取った。
シリカの配合割合は、隠蔽層を形成する固形分の総量中の２７．８質量％であった。
<Example 12>
Coating for concealment layer in the same manner as in Example 1 except that the same amount of polyester resin (tensile breaking strength: 40 MPa, molecular weight: 20000) having a tensile elongation at break of 10% and an acid value of 3 mg KOH / g was blended. A liquid was prepared to produce a pressure-sensitive correction tape, and the pressure-sensitive correction tape was wound into a roll.
The blending ratio of silica was 27.8% by mass in the total amount of solids forming the concealing layer.
〈比較例１〉
吸油量が４７０ｍｌ／１００ｇのシリカを同量、配合したこと以外は実施例１と同様にして隠蔽層用の塗布液を調製し、感圧修正テープを製造するとともに、当該感圧修正テープをロール状に巻き取った。
シリカの配合割合は、隠蔽層を形成する固形分の総量中の２７．８質量％であった。
〈比較例２〉
吸油量が２５０ｍｌ／１００ｇのシリカを同量、配合したこと以外は実施例１と同様にして隠蔽層用の塗布液を調製し、感圧修正テープを製造するとともに、当該感圧修正テープをロール状に巻き取った。
シリカの配合割合は、隠蔽層を形成する固形分の総量中の２７．８質量％であった。
<Comparative example 1>
A coating solution for the concealing layer was prepared in the same manner as in Example 1 except that the same amount and amount of silica having an oil absorption amount of 470 ml / 100 g was mixed, and a pressure-sensitive correction tape was produced and the pressure-sensitive correction tape was rolled. It was wound up into a shape.
The blending ratio of silica was 27.8% by mass in the total amount of solids forming the concealing layer.
<Comparative example 2>
A coating solution for the concealing layer was prepared in the same manner as in Example 1 except that the same amount and amount of silica having an oil absorption of 250 ml / 100 g was mixed, and a pressure-sensitive correction tape was produced and the pressure-sensitive correction tape was rolled. It was wound up into a shape.
The blending ratio of silica was 27.8% by mass in the total amount of solids forming the concealing layer.
〈比較例３〉
シリカに代えて、同量の炭酸マグネシウムを配合するとともに、ポリエステル樹脂に代えて、同量の、酸価が１９０ｍｇＫＯＨ／ｇであるマレイン酸樹脂を配合したこと以外は実施例１と同様にして隠蔽層用の塗布液を調製し、感圧修正テープを製造するとともに、当該感圧修正テープをロール状に巻き取った。
<Comparative Example 3>
Instead of silica, the same amount of magnesium carbonate was blended, and in place of the polyester resin, the same amount of maleic acid resin having an acid value of 190 mgKOH / g was blended. A coating solution for the layer was prepared to produce a pressure-sensitive correction tape, and the pressure-sensitive correction tape was wound into a roll.
前記各実施例、比較例で製造し、ロール状に巻き取った感圧修正テープを保持具〔前出のゼネラル(株)製の消し太郎〕に装填して、下記の各試験を行ない、その特性を評価した。
〈再筆記性評価Ｉ〉
前記転写具を用いて、ＰＰＣ用紙の上に隠蔽層を転写し、当該隠蔽層の上に市販のゲルインクボールペンを用いて、特開２００１−１５８８６９号公報の実施例１に記載の、せん断速度０．１（１／ｓ）での粘度が７５００ｍＰａ・ｓで、かつせん断速度１００（１／ｓ）での粘度が４５０ｍＰａ・ｓであるゲルインクによって筆記したのち、５秒後に指で表面をこすった際の状態を観察して、下記の基準で再筆記性を評価した。
The pressure-sensitive correction tape produced in each of the above Examples and Comparative Examples and wound up in a roll shape was loaded into a holder (external Taro manufactured by General Co., Ltd.) and subjected to the following tests. Characteristics were evaluated.
<Rewriteability evaluation I>
Using the transfer tool, a masking layer is transferred onto PPC paper, and a commercially available gel ink ballpoint pen is used on the masking layer, and the shear rate is 0 as described in Example 1 of JP-A-2001-158869. When the surface was rubbed with a finger after 5 seconds after writing with a gel ink having a viscosity at 1 (1 / s) of 7500 mPa · s and a viscosity at a shear rate of 100 (1 / s) of 450 mPa · s The re-writeability was evaluated according to the following criteria.
○：隠蔽層の表面、ＰＰＣ用紙の表面、および指のいずれも全く汚れていなかった。再筆記性良好。
△：隠蔽層の表面、ＰＰＣ用紙の表面、および指のいずれかに僅かな汚れが見られたが、実用上差し支えのないレベルであった。再筆記性通常。
×：隠蔽層の表面、ＰＰＣ用紙の表面、および指のいずれかに強い汚れが見られた。再筆記性不良。
○: The surface of the masking layer, the surface of the PPC paper, and the finger were not soiled at all. Good rewriteability.
Δ: Slight dirt was observed on any one of the surface of the masking layer, the surface of the PPC paper, and the finger, but it was a practically satisfactory level. Normal rewriteability.
X: Strong stains were observed on any of the surface of the masking layer, the surface of the PPC paper, and the finger. Bad rewriteability.
〈再筆記性評価II〉
前記転写具を用いて、ＰＰＣ用紙の上に隠蔽層を転写し、当該隠蔽層の上に市販のゲルインクボールペンを用いて、特開２００１−１５８８６９号公報の実施例１に記載の、せん断速度０．１（１／ｓ）での粘度が７５００ｍＰａ・ｓで、かつせん断速度１００（１／ｓ）での粘度が４５０ｍＰａ・ｓであるゲルインクによって線幅０．５ｍｍの細線を筆記して１０秒経過後に、６５０ｇｆ（＝６．３７Ｎ）の荷重をかけつつ金巾３号綿布によって擦過速度１２ｃｍ／ｓｅｃで１回擦過した。
<Rewriteability evaluation II>
Using the transfer tool, a masking layer is transferred onto PPC paper, and a commercially available gel ink ballpoint pen is used on the masking layer, and the shear rate is 0 as described in Example 1 of JP-A-2001-158869. 10 seconds after writing a thin line with a line width of 0.5 mm with gel ink having a viscosity at 0.1 (1 / s) of 7500 mPa · s and a viscosity at a shear rate of 100 (1 / s) of 450 mPa · s Later, it was rubbed once at a rub speed of 12 cm / sec with a No. 3 cotton cloth while applying a load of 650 gf (= 6.37 N).
擦過試験には、(株)安田精機製作所製のクロックメーターＮｏ．４１６−ＴＭＩ（摩擦試験機Ｉ型）を用いた。
そして擦過後の線幅の、擦過前に対する拡がりの割合を求めて、下記の基準で再筆記性を評価した。
○：線幅の拡がりは１０％未満であった。再筆記性良好。
△：線幅の拡がりは１０％以上、２０％未満であった。再筆記性通常。
×：線幅の拡がりは２０％以上であった。再筆記性不良。
For the abrasion test, a clock meter No. manufactured by Yasuda Seiki Seisakusho Co., Ltd. was used. 416-TMI (friction tester type I) was used.
Then, the ratio of the spread of the line width after rubbing to that before rubbing was determined, and the rewriting property was evaluated according to the following criteria.
◯: Line width expansion was less than 10%. Good rewriteability.
Δ: Line width expansion was 10% or more and less than 20%. Normal rewriteability.
X: The expansion of the line width was 20% or more. Bad rewriteability.
〈筆記濃度評価〉
前記転写具を用いて、ＰＰＣ用紙の上に隠蔽層を転写し、当該隠蔽層上とＰＰＣ用紙上に、それぞれ市販の水性インクボールペンを用いて筆記したのち、両筆記の文字濃度（ＰＳＣ値）を、グレタグマクベス社製のＰＣＭ−IIを用いて測定し、式(1)：
<Writing density evaluation>
Using the transfer tool, the concealing layer is transferred onto the PPC paper, written on the concealing layer and the PPC paper using a commercially available water-based ink ballpoint pen, and the character density (PSC value) of both writings. Is measured using PCM-II manufactured by Gretag Macbeth Co., and the formula (1):
により、筆記濃度の低下率（％）を求めた。そして前記低下率が５％未満のものを筆記濃度良好（○）、５％以上のものを筆記濃度不良（×）として評価した。
〈耐ブリード性評価〉
ＰＰＣ用紙の表面に、市販の油性インクボールペンを用いて筆記した上に、前記転写具を用いて隠蔽層を転写して筆記を隠蔽した。そして温度５０℃、相対湿度９０％の条件で３日間保存したのち、隠蔽層を観察して、隠蔽した文字が隠蔽層上に浮かび上がって見えてしまったものを耐ブリード性不良（×）、見えなかったものを耐ブリード性良好（○）として評価した。
Thus, the reduction rate (%) of the writing density was obtained. And the thing with the said reduction rate of less than 5% evaluated writing density favorable ((circle)) and 5% or more as writing density defect (x).
<Bleed resistance evaluation>
On the surface of the PPC paper, writing was performed using a commercially available oil-based ink ballpoint pen, and the masking layer was transferred using the transfer tool to conceal the writing. And after storing for 3 days under conditions of temperature 50 ° C. and relative humidity 90%, the concealed layer was observed, and the concealed characters appeared on the concealed layer and appeared to be poor bleed resistance (×), What was not seen was evaluated as good bleeding resistance (◯).
〈膜切れ性評価〉
前記転写具を用いて、ＰＰＣ用紙の上に、５００ｇの転写荷重で隠蔽層を転写したのち転写具のヘッドを紙面から引き離した際に、紙面上の隠蔽層が転写最終位置（ヘッドを引き離した位置）より後方に１ｍｍ以上はみ出したものを膜切れ性不良（×）、全くはみ出さなかったか、はみ出しても１ｍｍ未満であったものを膜切れ性良好（○）として評価した。
<Evaluation of film breakability>
When the concealing layer was transferred onto the PPC paper using the transfer tool with a transfer load of 500 g and then the head of the transfer tool was separated from the paper surface, the concealing layer on the paper surface was transferred to the final transfer position (the head was separated). A film that protruded 1 mm or more rearward from the position) was evaluated as poor film breakability (×), and a film that did not protrude at all or that protruded less than 1 mm was evaluated as good film breakability (◯).
以上の結果を表１〜表３に示す。 The above results are shown in Tables 1 to 3.
表１〜表３の実施例１〜１２、比較例１〜３の結果より、バインダ樹脂としてポリエステル樹脂を用いるとともに、充填剤として、吸油量２８０ｍｌ／１００ｇ以上、４３０ｍｌ／１００ｇ以下のシリカを用いることにより、耐ブリード性や再筆記性に優れる上、浸透による筆記濃度の低下を生じにくく、しかも膜切れ性にも優れた隠蔽層を備えた感圧修正テープが得られることが判った。 From the results of Examples 1 to 12 and Comparative Examples 1 to 3 in Tables 1 to 3, a polyester resin is used as a binder resin, and silica having an oil absorption of 280 ml / 100 g or more and 430 ml / 100 g or less is used as a filler. As a result, it was found that a pressure-sensitive correction tape having a concealing layer having excellent bleed resistance and re-writing property, hardly causing a decrease in writing density due to permeation, and having excellent film breakability can be obtained.
また実施例１〜５の結果より、シリカの吸油量は、前記範囲内でも３００ｍｌ／１００ｇ以上であるのが好ましく、４００ｍｌ／１００ｇ以下であるのが好ましいことが判った。
また実施例１、６〜９の結果より、シリカの配合割合は、隠蔽層を形成する固形分の総量中の３質量％以上、特に５質量％以上であるのが好ましく、３５質量％以下、特に３０質量％以下であるのが好ましいことが判った。
さらに実施例１、１０〜１２の結果より、ポリエステル樹脂の引張破断伸度は２５％以下であるのが好ましく、酸価は５ｍｇＫＯＨ／ｇ以下であるのが好ましいことが判った。
From the results of Examples 1 to 5, it was found that the oil absorption amount of silica is preferably 300 ml / 100 g or more, and preferably 400 ml / 100 g or less, even within the above range.
Moreover, from the results of Examples 1 and 6 to 9, the blending ratio of silica is preferably 3% by mass or more, particularly 5% by mass or more, preferably 35% by mass or less, based on the total amount of solids forming the concealing layer. In particular, it was found that the content is preferably 30% by mass or less.
Further from the results of Examples 1,10～12 is preferably tensile elongation at break of the polyester resin is Ru der 25% or less, the acid value was found to be preferably not more than 5 mgKOH / g.
Claims (4)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013031242A JP6106889B6 (en) | 2012-02-29 | 2013-02-20 | Pressure sensitive correction tape |
| TW102106670A TWI594900B (en) | 2012-02-29 | 2013-02-26 | Sensitive correction band |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012044267 | 2012-02-29 | ||
| JP2012044267 | 2012-02-29 | ||
| JP2013031242A JP6106889B6 (en) | 2012-02-29 | 2013-02-20 | Pressure sensitive correction tape |
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| Publication Number | Publication Date |
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| JP2013208898A JP2013208898A (en) | 2013-10-10 |
| JP2013208898A5 JP2013208898A5 (en) | 2016-03-24 |
| JP6106889B2 true JP6106889B2 (en) | 2017-04-05 |
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| TW201343422A (en) | 2013-11-01 |
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