JP5226177B2 - Pressure sensitive adhesive composition - Google Patents
Pressure sensitive adhesive composition Download PDFInfo
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- JP5226177B2 JP5226177B2 JP2005186041A JP2005186041A JP5226177B2 JP 5226177 B2 JP5226177 B2 JP 5226177B2 JP 2005186041 A JP2005186041 A JP 2005186041A JP 2005186041 A JP2005186041 A JP 2005186041A JP 5226177 B2 JP5226177 B2 JP 5226177B2
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- sensitive adhesive
- rubber latex
- adhesive composition
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- 239000000203 mixture Substances 0.000 title claims description 31
- 239000004820 Pressure-sensitive adhesive Substances 0.000 title claims description 29
- 229920000126 latex Polymers 0.000 claims description 31
- 239000004816 latex Substances 0.000 claims description 31
- 239000011347 resin Substances 0.000 claims description 30
- 229920005989 resin Polymers 0.000 claims description 30
- 239000007787 solid Substances 0.000 claims description 30
- 229920006173 natural rubber latex Polymers 0.000 claims description 23
- 150000002978 peroxides Chemical class 0.000 claims description 22
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 17
- 229920006174 synthetic rubber latex Polymers 0.000 claims description 15
- 239000002981 blocking agent Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 229920002472 Starch Polymers 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 description 11
- 230000001070 adhesive effect Effects 0.000 description 9
- 239000000758 substrate Substances 0.000 description 7
- 239000002562 thickening agent Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- -1 polyoxyethylene lauryl ether Polymers 0.000 description 4
- 239000004094 surface-active agent Substances 0.000 description 4
- 239000002518 antifoaming agent Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000003945 anionic surfactant Substances 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000002736 nonionic surfactant Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- SDTMFDGELKWGFT-UHFFFAOYSA-N 2-methylpropan-2-olate Chemical compound CC(C)(C)[O-] SDTMFDGELKWGFT-UHFFFAOYSA-N 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- 150000005215 alkyl ethers Chemical class 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- NKWPZUCBCARRDP-UHFFFAOYSA-L calcium bicarbonate Chemical compound [Ca+2].OC([O-])=O.OC([O-])=O NKWPZUCBCARRDP-UHFFFAOYSA-L 0.000 description 1
- 229910000020 calcium bicarbonate Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical class C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- LNMQRPPRQDGUDR-UHFFFAOYSA-N hexyl prop-2-enoate Chemical compound CCCCCCOC(=O)C=C LNMQRPPRQDGUDR-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000259 polyoxyethylene lauryl ether Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Adhesives Or Adhesive Processes (AREA)
Description
本発明は、感圧接着剤組成物に関し、更に詳しくは、弱圧による接着が可能な感圧接着剤組成物に関する。 The present invention relates to a pressure-sensitive adhesive composition, and more particularly to a pressure-sensitive adhesive composition capable of being bonded by low pressure.
近年、銀行、クレジット会社、官公庁等より個人宛に各個人の預金状況、残高情報、年金情報等を通知する手段として「親展性はがき」が使用されている。かかる親展性はがきに使用される用紙は、その情報記載面に、感圧接着剤が塗工されており、低い圧力では全く接着しないが、所定圧力以上で圧着すると接着するよう構成されている（特許文献１，２）。 In recent years, “confidentiality postcards” have been used as means for notifying individual individuals of deposit status, balance information, pension information, and the like from banks, credit companies, government offices, and the like. The paper used for such confidential postcards has a pressure sensitive adhesive coated on the information description surface, and does not adhere at all at a low pressure, but is configured to adhere when pressed at a predetermined pressure or higher ( Patent Documents 1 and 2).
しかし、従来の感圧接着剤は、接着に比較的高い圧力を要するため、接着にはドライシーラー等の圧着装置が必要であり、用途が限られていた。 However, since the conventional pressure-sensitive adhesive requires a relatively high pressure for bonding, a bonding device such as a dry sealer is required for bonding, and its application is limited.
本発明は、大規模な圧着装置を必要とせず、手でこする程度の弱圧でも接着が可能な感圧接着剤組成物を提供することを目的とする。 SUMMARY OF THE INVENTION An object of the present invention is to provide a pressure-sensitive adhesive composition that does not require a large-scale crimping device and can be bonded even with a low pressure of rubbing by hand.
すなわち、本発明の感圧接着剤組成物は、アクリル変性天然ゴムラテックスと、過酸化物前加硫ラテックスと、合成ゴムラテックスとを含有し、アクリル変性天然ゴムラテックス（樹脂固形分）と過酸化物前加硫ラテックス（樹脂固形分）との配合比率が重量比で１０：９０〜９０：１０であることを特徴とする。 That is, the pressure-sensitive adhesive composition of the present invention contains an acrylic-modified natural rubber latex, a pre-peroxide vulcanized latex, and a synthetic rubber latex, and an acrylic-modified natural rubber latex (resin solid content) and peroxide. The blending ratio with the pre-cured latex (resin solid content) is 10:90 to 90:10 by weight .
本発明の感圧接着剤組成物は、弱圧での接着が可能であり、例えば、硬貨、ペン先等を用いて比較的強めに数回こする程度で接着することができる。そのため、接着にドライシーラー等の圧着装置を必要とせず、例えば、封筒の口糊等にも利用可能である。 The pressure-sensitive adhesive composition of the present invention can be bonded at a low pressure, and for example, it can be bonded by using a coin, a pen tip or the like with relatively strong rubbing several times. Therefore, it does not require a crimping device such as a dry sealer for bonding, and can be used for, for example, a mouth paste of an envelope.
また、本発明の感圧接着剤組成物は、一旦接着した後に剥離することが可能であり、その後は、再度加圧しても再び接着することはないため、親展性はがき等に好適に使用できる。しかも、剥離時には、接着剤塗布面に印刷された文字等の判読は可能であるが、剥離した痕跡が残る程度に基材が破れる。 In addition, the pressure-sensitive adhesive composition of the present invention can be peeled after being once bonded, and thereafter, even if it is pressed again, it will not be bonded again, so that it can be suitably used for confidential postcards and the like. . Moreover, at the time of peeling, the characters printed on the adhesive-coated surface can be read, but the substrate is broken to such an extent that the peeled trace remains.
更に、本発明の感圧接着剤組成物は、接着力を調整することにより、接着後に基材を破ることなく剥離する擬似接着タイプの組成物とすることが可能である。 Furthermore, the pressure-sensitive adhesive composition of the present invention can be made into a pseudo-adhesive type composition that peels without tearing the substrate after bonding by adjusting the adhesive force.
本発明の感圧接着剤組成物は、アクリル変性天然ゴムラテックスと、過酸化物前加硫ラテックスと、合成ゴムラテックスとを含有する。 The pressure-sensitive adhesive composition of the present invention contains an acrylic-modified natural rubber latex, a pre-peroxide vulcanized latex, and a synthetic rubber latex.
アクリル変性天然ゴムラテックスは、天然ゴムラテックスをアクリル系単量体でグラフとしたラテックスである。アクリル系単量体としては、例えばアクリル酸メチル、アクリル酸ｎ−ブチル、アクリル酸ヘキシル、メタクリル酸メチル等が挙げられ、これらのうちでもメタクリル酸メチルが好ましい。また、グラフト化の度合いは、天然ゴム比５〜５０重量％であることが好ましい。 The acrylic modified natural rubber latex is a latex obtained by graphing natural rubber latex with acrylic monomers. Examples of the acrylic monomer include methyl acrylate, n-butyl acrylate, hexyl acrylate, and methyl methacrylate. Among these, methyl methacrylate is preferable. The degree of grafting is preferably 5 to 50% by weight relative to the natural rubber.
過酸化物前加硫ラテックスは、天然ゴムラテックスを過酸化物で前加硫したラテックスである。過酸化物としては、例えばベンゾイルパーオキシド、ジｔ−ブチルパーオキシジイソプロピルベンゼン、ｔ−ブチルハイドロパーオキシド等が挙げられ、これらのうちでもｔ−ブチルハイドロオキシドが、反応時のラテックス分散性、安定性に優れていることが知られている。 Peroxide pre-cured latex is a latex obtained by pre-curing natural rubber latex with peroxide. Examples of peroxides include benzoyl peroxide, di-t-butylperoxydiisopropylbenzene, and t-butyl hydroperoxide. Among these, t-butyl hydroxide is latex dispersibility and stability during the reaction. It is known to be excellent in properties.
合成ゴムララテックスとしては、例えば、スチレン−ブタジエンゴムラテックス、アクリロニトリル−ブタジエンゴムラテックス、ブタジエンゴムラテックス、クロロプレンゴムラテックス、ウレタンゴムラテックス等々が挙げられる。 Examples of the synthetic rubber latex include styrene-butadiene rubber latex, acrylonitrile-butadiene rubber latex, butadiene rubber latex, chloroprene rubber latex, urethane rubber latex, and the like.
アクリル変性天然ゴムラテックス（樹脂固形分）と過酸化物前加硫ラテックス（樹脂固形分）の合計量と、合成ゴムラテックス（樹脂固形分）との配合比率（アクリル変性天然ゴムラテックス（樹脂固形分）と過酸化物前加硫ラテックス（樹脂固形分）の合計量：合成ゴムラテックス（樹脂固形分））は、重量比で６０：４０〜９０：１０であることが好ましく、より好ましくは７０：３０〜８５：１５である。アクリル変性天然ゴムラテックスと過酸化物前加硫ラテックスの合計量がこの範囲より多すぎると（合成ゴムラテックスがこの範囲より少なすぎると）、基材への密着性、剥離時の凝集力が不足する傾向があり、アクリル変性天然ゴムラテックスと過酸化物前加硫ラテックスの合計量がこの範囲より少なすぎると（合成ゴムラテックスがこの範囲より多すぎると）、接着力が低下する傾向がある。 The blending ratio of acrylic modified natural rubber latex (resin solids) and pre-peroxide vulcanized latex (resin solids) to synthetic rubber latex (resin solids) (acrylic modified natural rubber latex (resin solids) ) And pre-peroxide vulcanized latex (resin solid content): the synthetic rubber latex (resin solid content)) is preferably 60:40 to 90:10 by weight, more preferably 70: 30-85: 15. If the total amount of acrylic-modified natural rubber latex and pre-peroxide vulcanized latex is too much above this range (if the synthetic rubber latex is too much below this range), adhesion to the substrate and cohesive force at the time of peeling will be insufficient. If the total amount of the acrylic modified natural rubber latex and the pre-peroxide vulcanized latex is too smaller than this range (if the synthetic rubber latex is more than this range), the adhesive force tends to decrease.
また、アクリル変性天然ゴムラテックス（樹脂固形分）と過酸化物前加硫ラテックス（樹脂固形分）との配合比率（アクリル変性天然ゴムラテックス：過酸化物前加硫ラテックス）は、重量比で１０：９０〜９０：１０であることが好ましく、より好ましくは２０：８０〜３０：７０であるが、擬似接着タイプの組成物とする場合は８０：２０〜７０：３０であることがより好ましい。アクリル変性天然ゴムラテックスがこの範囲より多すぎると（過酸化物前加硫ラテックスがこの範囲より少なすぎると）、接着に要する圧力が高くなる傾向があり、アクリル変性天然ゴムラテックスがこの範囲より少なすぎると（過酸化物前加硫ラテックスがこの範囲より多すぎると）、剥離が困難になる傾向があり、無理に剥離すると基材の破損を生じる可能性がある。 The blending ratio (acrylic modified natural rubber latex: peroxide precured latex) of the acrylic modified natural rubber latex (resin solid content) and the pre-peroxide vulcanized latex (resin solid content) is 10 by weight. Is preferably 90:90:10, more preferably 20: 80-30: 70, but more preferably 80: 20-70: 30 in the case of a pseudo-adhesive type composition. If the amount of acrylic modified natural rubber latex is too much above this range (if the amount of pre-peroxide vulcanized latex is too small than this range), the pressure required for adhesion tends to increase, and the amount of acrylic modified natural rubber latex is below this range. If it is too much (when the amount of the pre-peroxide vulcanized latex is more than this range), the peeling tends to be difficult, and if it is peeled forcibly, the substrate may be damaged.
感圧接着剤組成物中のアクリル変性天然ゴムラテックス（樹脂固形分）と過酸化物前加硫ラテックス（樹脂固形分）と合成ゴムラテックス（樹脂固形分）との合計含有量は、好ましくは５０〜７０重量％、より好ましくは６０〜７０重量％である。合計含有量が５０重量％未満では接着力が低下する傾向があり、７０重量％を超えると剥離が困難になる傾向があり、無理に剥離すると基材の破損を生じる可能性がある。 The total content of acrylic-modified natural rubber latex (resin solid content), peroxide pre-vulcanized latex (resin solid content) and synthetic rubber latex (resin solid content) in the pressure-sensitive adhesive composition is preferably 50. It is -70 weight%, More preferably, it is 60-70 weight%. If the total content is less than 50% by weight, the adhesive strength tends to decrease, and if it exceeds 70% by weight, peeling tends to be difficult, and if it is peeled forcibly, the substrate may be damaged.
感圧接着剤組成物は、保存時の糊面同士の接着を避ける為にアンチブロッキング剤を含有することが好ましい。 The pressure-sensitive adhesive composition preferably contains an anti-blocking agent in order to avoid adhesion between adhesive surfaces during storage.
アンチブロッキング剤の含有量は、アクリル変性天然ゴムラテックス（樹脂固形分）と過酸化物前加硫ラテックス（樹脂固形分）と合成ゴムラテックス（樹脂固形分）との合計量１００重量部に対し１０〜５０重量部であることが好ましく、１０〜３０重量部であることがより好ましい。アンチブロッキング剤の含有量が１０重量部未満では保存時に糊面同士が接着する可能性があり、５０重量部を超えると接着力が低下する傾向がある。 The content of the anti-blocking agent is 10 with respect to 100 parts by weight of the total amount of acrylic modified natural rubber latex (resin solid content), pre-peroxide vulcanized latex (resin solid content), and synthetic rubber latex (resin solid content). It is preferably ˜50 parts by weight, and more preferably 10 to 30 parts by weight. If the content of the anti-blocking agent is less than 10 parts by weight, the adhesive surfaces may adhere to each other during storage, and if it exceeds 50 parts by weight, the adhesive strength tends to decrease.
アンチブロッキング剤としては、例えば、重炭酸カルシウム、軽炭酸カルシウム、タルク、ステアリン酸金属石けん、でん粉、シリカ等が挙げられる。これらのうちでも、塗膜形成後のレーザープリンター等による耐熱性を向上せしめる為にシリカを含有させることが好ましい。また、擬似接着タイプの組成物とする場合には、でん粉を含有させることが好ましく、その含有量は、好ましくはアンチブロッキング剤中４０〜８０重量％、より好ましくは５０〜７０重量％である。 Examples of the anti-blocking agent include calcium bicarbonate, light calcium carbonate, talc, metal stearate soap, starch, silica and the like. Among these, it is preferable to contain silica in order to improve heat resistance by a laser printer or the like after the coating film is formed. Moreover, when setting it as a pseudo-adhesion type composition, it is preferable to contain a starch, and the content is preferably 40 to 80% by weight, more preferably 50 to 70% by weight in the antiblocking agent.
本発明の感圧接着剤組成物は、塗工適性を維持・向上せしめる為に、界面活性剤、消泡剤、増粘剤等の添加物を添加してもよい。界面活性剤としては、ノニオン界面活性剤とアニオン界面活性剤を併用することが好ましく、ノニオン界面活性剤としては、ポリオキシエチレンラウリルエーテル、ポリオキシエチレンスチレン化フェニルエーテル、ポリオキシエチレンアルキルエーテル等で、ＨＬＢが１３．０〜１９．０のもの、アニオン界面活性剤としては、アルキルベンゼンスルホン酸ナトリウム、高級アルコール硫酸エステルナトリウム、硫酸エステル系等を用いることができる。消泡剤としては非シリコン系消泡剤が接着力に影響をされずに好ましく、０．１〜０．５重量％程度添加することが好ましい。増粘剤はコーターの塗工適性上のため使用され、アクリル系、ポリアクリル酸、ＰＶＡ、ＣＭＣ等、セルローズ系増粘剤を用いることができるが、アクリル系増粘剤が粘度の経時変化も少なく好ましい。 In order to maintain and improve the coating suitability, the pressure-sensitive adhesive composition of the present invention may contain additives such as surfactants, antifoaming agents, and thickeners. As the surfactant, it is preferable to use a nonionic surfactant and an anionic surfactant in combination. Examples of the nonionic surfactant include polyoxyethylene lauryl ether, polyoxyethylene styrenated phenyl ether, and polyoxyethylene alkyl ether. As the anionic surfactant having an HLB of 13.0 to 19.0, sodium alkylbenzene sulfonate, sodium higher alcohol sulfate, sulfate ester or the like can be used. As the antifoaming agent, a non-silicon antifoaming agent is preferable without affecting the adhesive force, and it is preferable to add about 0.1 to 0.5% by weight. Thickeners are used for coater coating suitability, and acrylic, polyacrylic acid, PVA, CMC, etc., cellulose thickeners can be used, but acrylic thickeners also change in viscosity over time. Less preferred.
本発明の感圧接着剤組成物は、例えば、アクリル変性天然ゴムラテックスと過酸化物前加硫ラテックスとを配合し、要すれば界面活性剤を添加した後に、合成ゴムラテックスを配合し、要すればアンチブロッキング剤を添加し、更に必要に応じて消泡剤、増粘剤等の添加物を添加して混合することにより製造することができる。アンチブロッキング剤は、分散性をよくするために界面活性剤等の分散媒中に分散させて添加することが好ましい。 The pressure-sensitive adhesive composition of the present invention, for example, contains an acrylic-modified natural rubber latex and a pre-peroxide vulcanized latex, and if necessary, a surfactant is added, and then a synthetic rubber latex is added. If it does, it can manufacture by adding an antiblocking agent and also adding additives, such as an antifoamer and a thickener, as needed. The antiblocking agent is preferably added after being dispersed in a dispersion medium such as a surfactant in order to improve dispersibility.
本発明の感圧接着剤組成物は、グラビアコーター、フレキソ、エアナイフコーター、バーコーターなどの塗布手段により基材に塗布され、二つ折り、三つ折り、切り重ね、あるいは別体同士の重ね合わせなど、各種の重ね合わせの形で、ハガキ、各種帳票、通知書、各種カードなどに好適に利用できる。 The pressure-sensitive adhesive composition of the present invention is applied to a substrate by an application means such as a gravure coater, flexo, air knife coater, bar coater, etc. It can be suitably used for postcards, various forms, notices, various cards, etc. in various overlapping forms.
以下、実施例により本発明を詳細に説明する。 Hereinafter, the present invention will be described in detail by way of examples.
尚、実施例で用いたラテックス、及び実施例における評価方法は以下の通りである。 The latex used in the examples and the evaluation methods in the examples are as follows.
＜ラテックス＞
（１）アクリル変性天然ゴムラテックス
「ＱＹ＃２５ＭＧ」（クォー・ユー化成（有）製）、樹脂固形分５０ｗｔ％
<Latex>
(1) Acrylic-modified natural rubber latex “QY # 25MG” (manufactured by Qu Yu Kasei Co., Ltd.), resin solid content 50 wt%
（２）過酸化物前加硫ラテックス
「ＱＹ＃０５５ＰＣ」（クォー・ユー化成（有）製）、樹脂固形分５５ｗｔ％
(2) Pre-peroxide vulcanized latex “QY # 055PC” (manufactured by Qu Yu Kasei Co., Ltd.), resin solid content 55 wt%
（３）合成ゴムラテックス
「ＤＬ−６２０」（旭化成ケミカルズ（株）製）、ハイスチレンタイプ、樹脂固形分５０ｗｔ％
(3) Synthetic rubber latex “DL-620” (manufactured by Asahi Kasei Chemicals Corporation), high styrene type, resin solid content 50 wt%
＜評価方法＞
（１）配合安定性
製造直後、並びに７日・１４日・２１日及び３０日経過後に於ける感圧接着剤組成物の粘度を測定し、以下の基準で評価した。
<Evaluation method>
(1) Blending stability The viscosity of the pressure-sensitive adhesive composition was measured immediately after production and after 7 days, 14 days, 21 days, and 30 days, and evaluated according to the following criteria.
○：粘度上昇なし。
×：粘度上昇あり。
○: No increase in viscosity.
X: Increase in viscosity.
（２）機械的安定性
マロンテスターを用い、感圧接着剤組成物に１０ｋｇの荷重を１０分間加えた後、以下の基準で評価した。
(2) Mechanical stability Using a Maron tester, a 10 kg load was applied to the pressure-sensitive adhesive composition for 10 minutes, and then evaluated according to the following criteria.
○：ゲル化物の発生なし。
△：ゲル化物の発生が僅かにあり。
×：ゲル化物の発生が多量にあり。
○: No generation of gelled product.
Δ: Slight generation of gelled product.
X: A large amount of gelled product is generated.
（３）弱圧接着性
感圧接着剤組成物を、上質紙（１１０ｋｇ）にバーコーターを用いて乾燥重量８〜１０ｇ／ｍ2となるように塗工し、１０５℃×１分間熱風乾燥した後、２５℃相対湿度５０％で１時間放置して塗工紙を得た。
(3) Weak pressure adhesiveness The pressure sensitive adhesive composition was coated on fine paper (110 kg) using a bar coater so that the dry weight was 8 to 10 g / m 2, and dried with hot air at 105 ° C. for 1 minute. Then, it was left to stand at 25 ° C. and 50% relative humidity for 1 hour to obtain a coated paper.
得られた塗工紙の感圧接着剤組成物塗布面を合わせ、５００円玉を縦にして１４．７１Ｎまでの荷重をかけて１回なぞった際に、十分な接着力が得られる最低加重を測定すると共に、剥離速度３００ｍｍ／ｍｉｎで剥離した際の基材の状態を目視で観察した。 When the pressure-sensitive adhesive composition coated surface of the coated paper is combined and a 500-yen coin is placed vertically and a load of up to 14.71 N is applied and traced once, the minimum load that provides sufficient adhesive strength And the state of the substrate when peeled at a peeling speed of 300 mm / min was visually observed.
＜実施例１〜４，比較例１，２＞
表１に示す配合で各成分を混合し、ホモコロイドミキサーでよく撹拌して、感圧接着剤組成物を得た。評価結果を表１に示す。
<Examples 1-4, Comparative Examples 1 and 2>
Each component was mixed with the composition shown in Table 1, and stirred well with a homocolloid mixer to obtain a pressure-sensitive adhesive composition. The evaluation results are shown in Table 1.
Claims (5)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2007126774A (en) * | 2005-11-02 | 2007-05-24 | Kyodo Printing Co Ltd | Pressure-sensitive adhesive paper |
| JP4966538B2 (en) * | 2005-11-02 | 2012-07-04 | 共同印刷株式会社 | Information hiding paper |
| JP4825505B2 (en) * | 2005-12-06 | 2011-11-30 | 共同印刷株式会社 | Information hiding postcard |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3677685B2 (en) * | 1992-03-31 | 2005-08-03 | トッパン・フォームズ株式会社 | Information carrier sheet |
| JPH0811468A (en) * | 1994-06-30 | 1996-01-16 | Toppan Moore Co Ltd | Hiding information-holding body and its production |
| JP3098967B2 (en) * | 1996-10-30 | 2000-10-16 | 日本エヌエスシー株式会社 | Cold seal adhesive capable of forming a transparent film |
| JPH1148651A (en) * | 1997-07-31 | 1999-02-23 | Toppan Forms Co Ltd | Information carrying sheet for ink jet recording |
| JP2000190667A (en) * | 1998-12-25 | 2000-07-11 | Daio Paper Corp | Information recording paper |
| JP4852202B2 (en) * | 2001-06-29 | 2012-01-11 | トッパン・フォームズ株式会社 | Pressure sensitive adhesive composition and information carrying sheet using the same |
| JP3626150B2 (en) * | 2002-05-20 | 2005-03-02 | 第一工業製薬株式会社 | Pseudo pressure sensitive adhesive composition |
| JP2007126774A (en) * | 2005-11-02 | 2007-05-24 | Kyodo Printing Co Ltd | Pressure-sensitive adhesive paper |
| JP4966538B2 (en) * | 2005-11-02 | 2012-07-04 | 共同印刷株式会社 | Information hiding paper |
| JP4825505B2 (en) * | 2005-12-06 | 2011-11-30 | 共同印刷株式会社 | Information hiding postcard |
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