JP2021038488A - Base paper for pseudo-adhesive paper, pseudo-adhesive paper, and delivery slip paper - Google Patents
Base paper for pseudo-adhesive paper, pseudo-adhesive paper, and delivery slip paper Download PDFInfo
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- 239000000853 adhesive Substances 0.000 title claims abstract description 254
- 230000001070 adhesive effect Effects 0.000 claims abstract description 51
- 239000000123 paper Substances 0.000 claims description 315
- 239000000835 fiber Substances 0.000 claims description 43
- 239000002994 raw material Substances 0.000 claims description 30
- 239000012790 adhesive layer Substances 0.000 claims description 26
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 25
- 239000002655 kraft paper Substances 0.000 claims description 24
- 229920002472 Starch Polymers 0.000 claims description 12
- 239000000377 silicon dioxide Substances 0.000 claims description 12
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- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 5
- 239000011121 hardwood Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 abstract description 14
- 229920001131 Pulp (paper) Polymers 0.000 description 18
- 238000000034 method Methods 0.000 description 13
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
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- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-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
- 229920002126 Acrylic acid copolymer Polymers 0.000 description 1
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- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 241000218645 Cedrus Species 0.000 description 1
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 1
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- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 235000011613 Pinus brutia Nutrition 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
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
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- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000006081 fluorescent whitening agent Substances 0.000 description 1
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- 239000011487 hemp Substances 0.000 description 1
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- 230000001678 irradiating effect Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229920003145 methacrylic acid copolymer Polymers 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000012766 organic filler Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 239000013054 paper strength agent Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
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- 229920002401 polyacrylamide Polymers 0.000 description 1
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- 238000003825 pressing Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- 229910021647 smectite Inorganic materials 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
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Abstract
Description
本発明は、疑似接着紙用原紙、疑似接着紙および配送伝票用紙に関する。 The present invention relates to a base paper for pseudo-adhesive paper, a pseudo-adhesive paper, and a delivery slip paper.
疑似接着紙は、たとえば、疑似接着紙用原紙と、該疑似接着紙用原紙の少なくとも一面に形成される疑似接着剤層とを備え、ラベル紙などの被接着体が、加圧または加熱加圧により、疑似接着剤層に剥離可能に疑似接着されるものである。疑似接着剤層は、通常、常温常圧下では接着力がないが、加圧または加熱加圧により接着力が付与され、被接着体が疑似接着剤層に接着された後、容易に剥離することができる機能を有する。 The pseudo-adhesive paper includes, for example, a base paper for pseudo-adhesive paper and a pseudo-adhesive layer formed on at least one surface of the base paper for pseudo-adhesive paper. As a result, the pseudo-adhesive layer is detachably pseudo-adhered to the pseudo-adhesive layer. The pseudo-adhesive layer usually has no adhesive force under normal temperature and pressure, but the adhesive force is imparted by pressurization or heating and pressurization, and the adherend is easily peeled off after being adhered to the pseudo-adhesive layer. Has the function of being able to.
特許文献１には、基紙が特定の範囲に叩解された原料パルプからなり、特定の紙力剤を特定の割合で含有した圧着用紙が記載されている。特許文献２には、配送伝票を特定の形状にすることにより、配送票の剥れが防止され、剥離部分が一目で判り、受領票の剥離が容易に行えると記載されている。 Patent Document 1 describes a crimping paper in which the base paper is made of raw material pulp beaten to a specific range and contains a specific paper strength agent in a specific ratio. Patent Document 2 describes that by making the delivery slip into a specific shape, peeling of the delivery slip can be prevented, the peeled portion can be seen at a glance, and the receipt slip can be easily peeled off.
疑似接着紙には、各種環境条件下での経時安定性が求められる。このため、疑似接着紙の接着力は、弱すぎて被接着体が意図しないときに剥がれてしまうことがなく、強すぎて被接着体の剥離が困難であることがないように、用途に応じて調整される。
しかし、特許文献１および２では、疑似接着紙の接着力の経時的な低下について検討されておらず、課題を有していた。
Pseudo-adhesive paper is required to be stable over time under various environmental conditions. Therefore, the adhesive strength of the pseudo-adhesive paper is not too weak to be peeled off when the object to be adhered is not intended, and is not too strong to be difficult to peel off depending on the application. Is adjusted.
However, in Patent Documents 1 and 2, the decrease in the adhesive force of the pseudo-adhesive paper with time is not examined, and there is a problem.
本発明は、接着力の経時的な低下を抑制することができる疑似接着紙用原紙、該疑似接着紙用原紙を用いた疑似接着紙、および該疑似接着紙を用いた配送伝票用紙を提供することを目的とする。 The present invention provides a base paper for pseudo-adhesive paper capable of suppressing a decrease in adhesive strength with time, a pseudo-adhesive paper using the base paper for pseudo-adhesive paper, and a delivery slip paper using the pseudo-adhesive paper. The purpose is.
本発明者らは、疑似接着紙用原紙の表面開口率を１．００％以上１．５０％以下にすることにより、疑似接着剤層が十分に形成され、疑似接着剤が過度に疑似接着紙用原紙に浸透してしまうことを防ぐことができ、その結果、疑似接着紙の接着力の経時的な低下を抑制することができることを見出した。
すなわち、本発明は、以下の＜１＞〜＜１０＞に関する。
＜１＞ 加圧により剥離可能に疑似接着される疑似接着紙に用いられる疑似接着紙用原紙であって、
疑似接着剤が付与される面における表面開口率が、１．００％以上１．５０％以下である、疑似接着紙用原紙。
＜２＞ ＪＩＳ Ｐ ８１２１−２：２０１２に準拠したカナダ標準ろ水度が、３５０ｍＬ以上４５０ｍＬ以下である原料パルプからなる、＜１＞に記載の疑似接着紙用原紙。
＜３＞ 前記原料パルプ中の広葉樹晒クラフトパルプの含有量が７５質量％以上である、＜２＞に記載の疑似接着紙用原紙。
＜４＞ 前記疑似接着紙用原紙を構成する繊維の平均繊維長が、０．６５ｍｍ以上１．００ｍｍ以下である、＜１＞〜＜３＞のいずれかに記載の疑似接着紙用原紙。
＜５＞ 前記疑似接着紙用原紙を構成する繊維のルンケル比が、０．９０以下である、＜１＞〜＜４＞のいずれかに記載の疑似接着紙用原紙。
＜６＞ 厚さが５μｍ以上１００μｍ以下であり、かつ、坪量が３０ｇ／ｍ２以上１００ｇ／ｍ２未満である、＜１＞〜＜５＞のいずれかに記載の疑似接着紙用原紙。
＜７＞ ＜１＞〜＜６＞のいずれかに記載の疑似接着紙用原紙の片面側のみに、疑似接着剤から形成される疑似接着剤層を有する疑似接着紙。
＜８＞ 前記疑似接着剤が、アクリル系接着剤、および酢酸ビニル系接着剤のいずれか１種以上を６５質量％以上８５質量％以下、合成シリカを１２．５質量％以上３２．５質量％以下、かつ、澱粉を０．５質量％以上２．５質量％以下含有する、＜７＞に記載の疑似接着紙。
＜９＞ 前記合成シリカの平均粒子径が０．２μｍ以上３．０μｍ以下であり、かつ、前記澱粉の平均粒子径が７．０μｍ以上１５．０μｍ以下である、＜８＞に記載の疑似接着紙。
＜１０＞ ＜７＞〜＜９＞のいずれかに記載の疑似接着紙の疑似接着剤層面側にラベル紙を備え、疑似接着剤層の反対面側に粘着剤、剥離紙が順次積層される配送伝票用紙。
By setting the surface opening ratio of the base paper for pseudo-adhesive paper to 1.00% or more and 1.50% or less, the present inventors sufficiently form a pseudo-adhesive layer, and the pseudo-adhesive is excessively pseudo-adhesive paper. It has been found that it is possible to prevent the paper from penetrating into the base paper, and as a result, it is possible to suppress a decrease in the adhesive strength of the pseudo-adhesive paper over time.
That is, the present invention relates to the following <1> to <10>.
<1> A base paper for pseudo-adhesive paper used for pseudo-adhesive paper that is pseudo-adhesive so that it can be peeled off by pressure.
A base paper for pseudo-adhesive paper having a surface aperture ratio of 1.00% or more and 1.50% or less on the surface to which the pseudo-adhesive is applied.
<2> The base paper for pseudo-adhesive paper according to <1>, which comprises raw material pulp having a Canadian standard freeness of 350 mL or more and 450 mL or less in accordance with JIS P 811-2: 2012.
<3> The base paper for pseudo-adhesive paper according to <2>, wherein the content of the hardwood bleached kraft pulp in the raw material pulp is 75% by mass or more.
<4> The base paper for pseudo-adhesive paper according to any one of <1> to <3>, wherein the average fiber length of the fibers constituting the base paper for pseudo-adhesive paper is 0.65 mm or more and 1.00 mm or less.
<5> The base paper for pseudo-adhesive paper according to any one of <1> to <4>, wherein the runkel ratio of the fibers constituting the base paper for pseudo-adhesive paper is 0.90 or less.
<6> The base paper for pseudo-adhesive paper according to any one of <1> to <5>, wherein the thickness is 5 μm or more and 100 μm or less, and the basis weight is 30 g / m 2 or more and less than 100 g / m 2.
<7> A pseudo-adhesive paper having a pseudo-adhesive layer formed of a pseudo-adhesive only on one side of the base paper for pseudo-adhesive paper according to any one of <1> to <6>.
<8> The pseudo-adhesive is 65% by mass or more and 85% by mass or less of any one or more of acrylic adhesive and vinyl acetate-based adhesive, and 12.5% by mass or more and 32.5% by mass of synthetic silica. The pseudo-adhesive paper according to <7>, which contains 0.5% by mass or more and 2.5% by mass or less of starch.
<9> The pseudo-adhesion according to <8>, wherein the average particle size of the synthetic silica is 0.2 μm or more and 3.0 μm or less, and the average particle size of the starch is 7.0 μm or more and 15.0 μm or less. paper.
<10> A label paper is provided on the pseudo-adhesive layer side of the pseudo-adhesive paper according to any one of <7> to <9>, and the adhesive and the release paper are sequentially laminated on the opposite surface side of the pseudo-adhesive layer. Delivery slip form.
本発明によれば、接着力の経時的な低下を抑制することができる疑似接着紙用原紙、該疑似接着紙用原紙を用いた疑似接着紙、および該疑似接着紙を用いた配送伝票用紙が提供される。 According to the present invention, a base paper for pseudo-adhesive paper capable of suppressing a decrease in adhesive strength with time, a pseudo-adhesive paper using the base paper for pseudo-adhesive paper, and a delivery slip paper using the pseudo-adhesive paper are provided. Provided.
［疑似接着紙用原紙］
本発明の疑似接着紙用原紙は、加圧により剥離可能に疑似接着される疑似接着紙に用いられる疑似接着紙用原紙であって、疑似接着剤が付与される面における表面開口率が、１．００％以上１．５０％以下である。
表面開口率とは、疑似接着紙用原紙の疑似接着剤が付与される面を観察したときに、表面空隙部分と認められる、表面より低くなっている部分（開口部）の面積比率をいう。詳細については後述する。
[Base paper for pseudo adhesive paper]
The base paper for pseudo-adhesive paper of the present invention is a base paper for pseudo-adhesive paper used for pseudo-adhesive paper that is pseudo-adhesive so that it can be peeled off by pressurization, and has a surface opening ratio of 1 on the surface to which the pseudo-adhesive is applied. It is 0.00% or more and 1.50% or less.
The surface aperture ratio refers to the area ratio of a portion (opening) lower than the surface, which is recognized as a surface void portion when observing the surface of the base paper for pseudo-adhesive paper to which the pseudo-adhesive is applied. Details will be described later.
本発明によれば、疑似接着紙用原紙の疑似接着剤が付与される面における表面開口率を特定の範囲とすることによって、疑似接着剤層が十分に形成され、疑似接着剤が疑似接着紙用原紙に過度に浸透してしまうことを抑制することができるので、接着力に優れるとともに、接着力の経時的な低下を抑制することができる疑似接着紙用原紙、該疑似接着紙用原紙を用いた疑似接着紙、および該疑似接着紙を用いた配送伝票用紙が得られる。
以下、本発明について、さらに詳細に説明する。
According to the present invention, the pseudo-adhesive layer is sufficiently formed by setting the surface opening ratio on the surface of the base paper for pseudo-adhesive paper to which the pseudo-adhesive is applied within a specific range, and the pseudo-adhesive is the pseudo-adhesive paper. Since it is possible to prevent excessive penetration into the base paper for use, the base paper for pseudo-adhesive paper, which is excellent in adhesive strength and can suppress the decrease in adhesive strength with time, and the base paper for pseudo-adhesive paper The pseudo-adhesive paper used and the delivery slip paper using the pseudo-adhesive paper can be obtained.
Hereinafter, the present invention will be described in more detail.
疑似接着紙用原紙は、原料としてパルプを含む。パルプの製法および種類は、特に限定されない。 The base paper for pseudo-adhesive paper contains pulp as a raw material. The manufacturing method and type of pulp are not particularly limited.
＜原料パルプ＞
原料パルプとしては、たとえば木材パルプ、非木材パルプ、および脱墨パルプが挙げられる。木材パルプとしては、特に限定されないが、たとえば広葉樹晒クラフトパルプ（ＬＢＫＰ）、広葉樹未晒クラフトパルプ（ＬＵＫＰ）、針葉樹晒クラフトパルプ（ＮＢＫＰ）、針葉樹未晒クラフトパルプ（ＮＵＫＰ）、サルファイトパルプ（ＳＰ）、溶解パルプ（ＤＰ）、ソーダパルプ（ＡＰ）、酸素漂白クラフトパルプ（ＯＫＰ）等の化学パルプ、セミケミカルパルプ（ＳＣＰ）、ケミグラウンドウッドパルプ（ＣＧＰ）等の半化学パルプ、砕木パルプ（ＧＰ）、サーモメカニカルパルプ（ＴＭＰ）、ケミサーモメカニカルパルプ（ＣＴＭＰ）等の機械パルプ等が挙げられる。非木材パルプとしては、特に限定されないが、たとえばコットンリンター、コットンリント等の綿系パルプ、麻、麦わら、竹、バガス等の非木材系パルプが挙げられる。脱墨パルプとしては、特に限定されないが、たとえば古紙を原料とする脱墨パルプが挙げられる。原料パルプは、上記の１種を単独でも２種以上混合して用いてもよい。なお、原料パルプに、ポリアミド繊維、ポリエステル繊維等の有機合成繊維、ポリノジック繊維等の再生繊維、ガラス繊維、セラミック繊維、カーボン繊維等の無機繊維を混用してもよい。
<Raw material pulp>
Raw material pulp includes, for example, wood pulp, non-wood pulp, and deinked pulp. The wood pulp is not particularly limited, but for example, broad-leaved bleached kraft pulp (LBKP), broad-leaved unbleached kraft pulp (LUKP), coniferous bleached kraft pulp (NBKP), coniferous unbleached kraft pulp (NUKP), sulfite pulp (SP) ), Melted pulp (DP), soda pulp (AP), oxygen bleached kraft pulp (OKP) and other chemical pulp, semi-chemical pulp (SCP), chemiground wood pulp (CGP) and other semi-chemical pulp, crushed wood pulp (GP) ), Thermomechanical pulp (TMP), mechanical pulp such as chemithermomechanical pulp (CTMP) and the like. The non-wood pulp is not particularly limited, and examples thereof include cotton pulp such as cotton linter and cotton lint, and non-wood pulp such as hemp, straw, bamboo, and bagasse. The deinking pulp is not particularly limited, and examples thereof include deinking pulp made from recycled paper. As the raw material pulp, one of the above types may be used alone or a mixture of two or more types may be used. The raw material pulp may be mixed with organic synthetic fibers such as polyamide fibers and polyester fibers, recycled fibers such as polynosic fibers, and inorganic fibers such as glass fibers, ceramic fibers and carbon fibers.
原料パルプは、入手のしやすさという観点から、木材パルプおよび脱墨パルプが好ましい。また、原料パルプは、木材パルプの中でも、接着力の経時的な低下を抑制する観点から、好ましくは化学パルプであり、より好ましくはクラフトパルプであり、さらに好ましくはユーカリ、アカシア等の広葉樹クラフトパルプ、およびマツ、スギ等の針葉樹クラフトパルプから選択される１種以上であり、よりさらに好ましくは広葉樹晒クラフトパルプおよび針葉樹晒クラフトパルプから選択される１種以上である。 As the raw material pulp, wood pulp and deinked pulp are preferable from the viewpoint of availability. Among wood pulps, the raw material pulp is preferably chemical pulp, more preferably kraft pulp, and more preferably broadleaf kraft pulp such as eucalyptus and acacia, from the viewpoint of suppressing a decrease in adhesive strength with time. , And one or more selected from softwood kraft pulp such as pine and cedar, and even more preferably one or more selected from softwood bleached kraft pulp and softwood bleached kraft pulp.
本発明では、接着力に優れ、接着力の経時的な低下を抑制可能な疑似接着紙を得る観点から、原料パルプ中の広葉樹晒クラフトパルプの含有量が７５質量％以上であることが好ましい。上記観点から、原料パルプ中の広葉樹晒クラフトパルプの含有量は、より好ましくは８０質量％以上であり、その上限は、１００質量％であってもよい。 In the present invention, the content of hardwood bleached kraft pulp in the raw material pulp is preferably 75% by mass or more from the viewpoint of obtaining a pseudo-adhesive paper having excellent adhesive strength and capable of suppressing a decrease in adhesive strength with time. From the above viewpoint, the content of the hardwood bleached kraft pulp in the raw material pulp is more preferably 80% by mass or more, and the upper limit thereof may be 100% by mass.
（カナダ標準ろ水度（ＣＳＦ））
原料パルプは、ＪＩＳ Ｐ ８１２１−２：２０１２に準拠したカナダ標準ろ水度（ＣＳＦ）が、３５０ｍＬ以上４５０ｍＬ以下であることが好ましい。原料パルプのＣＳＦが上記範囲内であると、疑似接着紙用原紙は、紙の伸縮率が上がらずにカールが発生しにくいため、使用性に優れるとともに、接着力に優れ、接着力の経時的な低下を抑制することができる。上記観点から、原料パルプのＣＳＦは、より好ましくは３８０ｍＬ以上、さらに好ましくは３９０ｍＬ以上、よりさらに好ましくは４００ｍＬ以上であり、そして、より好ましくは４４５ｍＬ以下、さらに好ましくは４３５ｍＬ以下、よりさらに好ましくは４２０ｍＬ以下である。
ＣＳＦは、２種以上の原料パルプを使用する場合には、別々に叩解したパルプを混合して上記範囲内に調整してもよいし、予め混合したパルプを叩解して上記範囲内に調整してもよい。なお、パルプを叩解する方法は、特に限定されず、リファイナー等の一般的な叩解機が用いられる。
(Canada Standard Water Separation (CSF))
The raw material pulp preferably has a Canadian standard freshness (CSF) of 350 mL or more and 450 mL or less in accordance with JIS P 811-2: 2012. When the CSF of the raw material pulp is within the above range, the base paper for pseudo-adhesive paper does not increase the expansion and contraction rate of the paper and is less likely to curl, so that it is excellent in usability, excellent adhesive strength, and adhesive strength over time. It is possible to suppress such a decrease. From the above viewpoint, the CSF of the raw material pulp is more preferably 380 mL or more, further preferably 390 mL or more, still more preferably 400 mL or more, and more preferably 445 mL or less, still more preferably 435 mL or less, still more preferably 420 mL. It is as follows.
When two or more kinds of raw material pulps are used, the CSF may be adjusted within the above range by mixing the pulps beaten separately, or by beating the premixed pulps and adjusting within the above range. You may. The method of beating the pulp is not particularly limited, and a general beating machine such as a refiner is used.
（平均繊維長）
疑似接着紙用原紙を構成する繊維の平均繊維長は、０．６５ｍｍ以上１．００ｍｍ以下であることが好ましい。平均繊維長が上記範囲内であると、接着力および内部結合強度に優れ、疑似接着剤層に疑似接着される被接着体を剥がす際に、疑似接着紙が層間剥離してしまうことを防ぐことができる。上記観点から、平均繊維長は、より好ましくは０．７０ｍｍ以上、さらに好ましくは０．７５ｍｍ以上、よりさらに好ましくは０．８０ｍｍ以上であり、そして、より好ましくは０．９５ｍｍ以下である。
疑似接着紙用原紙を構成する繊維の繊維長は、繊維長測定装置（たとえば、メッツォ社製の「カヤーニファイバーラボ」）を用いて２回測定され、その平均値を平均繊維長とする。
(Average fiber length)
The average fiber length of the fibers constituting the base paper for pseudo-adhesive paper is preferably 0.65 mm or more and 1.00 mm or less. When the average fiber length is within the above range, the adhesive strength and the internal bond strength are excellent, and it is possible to prevent the pseudo-adhesive paper from being delaminated when the adherend to be pseudo-adhered to the pseudo-adhesive layer is peeled off. Can be done. From the above viewpoint, the average fiber length is more preferably 0.70 mm or more, still more preferably 0.75 mm or more, still more preferably 0.80 mm or more, and more preferably 0.95 mm or less.
The fiber length of the fibers constituting the base paper for pseudo-adhesive paper is measured twice using a fiber length measuring device (for example, "Kayani FiberLab" manufactured by Mezzo), and the average value is taken as the average fiber length.
（ルンケル比）
本発明では、接着力に優れ、接着力の経時的な低下を抑制することができる疑似接着紙を得る観点から、疑似接着紙用原紙を構成する繊維のルンケル比は、０．９０以下であることが好ましい。上記観点から、ルンケル比は、より好ましくは０．８５以下であり、そして、好ましくは０．５０以上、より好ましくは０．６０以上、さらに好ましくは０．７０以上である。
疑似接着紙用原紙を構成する繊維のルンケル比は、下記式により算出される。
ルンケル比＝繊維壁厚×２／ルーメン径
繊維壁厚およびルーメン径は、繊維長測定装置（たとえば、メッツォ社製の「カヤーニファイバーラボ」）を用いて測定される。
(Runkel ratio)
In the present invention, from the viewpoint of obtaining a pseudo-adhesive paper having excellent adhesive strength and capable of suppressing a decrease in adhesive strength with time, the runkel ratio of the fibers constituting the base paper for pseudo-adhesive paper is 0.90 or less. Is preferable. From the above viewpoint, the runkel ratio is more preferably 0.85 or less, and preferably 0.50 or more, more preferably 0.60 or more, still more preferably 0.70 or more.
The runkel ratio of the fibers constituting the base paper for pseudo-adhesive paper is calculated by the following formula.
Runkel ratio = fiber wall thickness x 2 / lumen diameter The fiber wall thickness and lumen diameter are measured using a fiber length measuring device (for example, "Kayani FiberLab" manufactured by Mezzo).
＜任意成分＞
疑似接着紙用原紙は、必要に応じて、たとえば、アニオン性、カチオン性もしくは両性の歩留剤、濾水性向上剤、乾燥紙力増強剤、湿潤紙力増強剤、填料、サイズ剤等の内添助剤、染料、蛍光増白剤等の任意成分を含んでいてもよい。
乾燥紙力増強剤としては、カチオン化澱粉、ポリアクリルアミド、カルボキシメチルセルロース等が挙げられる。乾燥紙力増強剤の含有量は、特に限定されないが、原料パルプ（絶乾質量）１００質量部に対して、好ましくは０．０５質量部以上、より好ましくは０．０７質量部以上であり、そして、好ましくは１．０質量部以下、より好ましくは０．７質量部以下である。
湿潤紙力増強剤としては、ポリアミドポリアミンエピクロロヒドリン、尿素ホルムアルデヒド樹脂、メラミンホルムアルデヒド樹脂等が挙げられる。
填料としては、タルク、カオリン、焼成カオリン、炭酸カルシウム、硫酸カルシウム、硫酸バリウム、二酸化チタン、酸化亜鉛、アルミナ、炭酸マグネシウム、酸化マグネシウム、シリカ、ホワイトカーボン、ベントナイト、ゼオライト、セリサイト、スメクタイト等の無機填料、アクリル系樹脂、塩化ビニリデン系樹脂等の有機填料が挙げられる。
サイズ剤としては、ロジンサイズ剤、合成サイズ剤、石油樹脂系サイズ剤等の内添サイズ剤、スチレン／アクリル酸共重合体、スチレン／メタクリル酸共重合体等の表面サイズ剤が挙げられる。
<Arbitrary ingredient>
The base paper for pseudo-adhesive paper includes, for example, anionic, cationic or amphoteric retention agents, drainage improvers, dry paper strength enhancers, wet paper strength enhancers, fillers, sizing agents and the like, if necessary. It may contain an optional component such as an auxiliary agent, a dye, and a fluorescent whitening agent.
Examples of the dry paper strength enhancer include cationized starch, polyacrylamide, carboxymethyl cellulose and the like. The content of the dry paper strength enhancer is not particularly limited, but is preferably 0.05 parts by mass or more, more preferably 0.07 parts by mass or more, based on 100 parts by mass of the raw material pulp (absolute dry mass). Then, it is preferably 1.0 part by mass or less, and more preferably 0.7 part by mass or less.
Examples of the wet paper strength enhancer include polyamide polyamine epichlorohydrin, urea formaldehyde resin, and melamine formaldehyde resin.
Fillers include talc, kaolin, calcined kaolin, calcium carbonate, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, alumina, magnesium carbonate, magnesium oxide, silica, white carbon, bentonite, zeolite, sericite, smectite and other inorganic substances. Examples thereof include organic fillers such as fillers, acrylic resins, and vinylidene chloride resins.
Examples of the sizing agent include internal sizing agents such as rosin sizing agents, synthetic sizing agents and petroleum resin-based sizing agents, and surface sizing agents such as styrene / acrylic acid copolymers and styrene / methacrylic acid copolymers.
［疑似接着紙用原紙の製造方法］
疑似接着紙用原紙の製造方法は、上記の原料パルプを含むスラリーを抄紙する工程を含むことが好ましい。
抄紙方法については、特に限定されず、たとえばｐＨが４．５付近で抄紙を行う酸性抄紙法、ｐＨが約６〜約９で抄紙を行う中性抄紙法等が挙げられる。
抄紙工程では、必要に応じて、ｐＨ調整剤、消泡剤、ピッチコントロール剤、スライムコントロール剤等の抄紙工程用薬剤を適宜添加できる。
抄紙機についても、特に限定されず、たとえば長網式、円網式、傾斜式等の連続抄紙機、またはこれらを組み合わせた多層抄き合わせ抄紙機等が挙げられる。
[Manufacturing method of base paper for pseudo-adhesive paper]
The method for producing the base paper for pseudo-adhesive paper preferably includes a step of making a slurry containing the above-mentioned raw material pulp.
The papermaking method is not particularly limited, and examples thereof include an acidic papermaking method in which papermaking is performed at a pH of around 4.5, and a neutral papermaking method in which papermaking is performed at a pH of about 6 to about 9.
In the papermaking process, chemicals for the papermaking process such as a pH adjuster, an antifoaming agent, a pitch control agent, and a slime control agent can be appropriately added as needed.
The paper machine is also not particularly limited, and examples thereof include continuous paper machines such as long net type, circular net type, and inclined type, and multi-layer paper making machines combining these.
＜疑似接着紙用原紙の特性＞
（表面開口率）
疑似接着紙用原紙の疑似接着剤が付与される面における表面開口率は、１．００％以上１．５０％以下である。表面開口率が上記範囲内であると、疑似接着剤層が十分に形成され、疑似接着剤が疑似接着紙用原紙へ過度に浸透してしまうことを抑制できるので、接着力に優れ、接着力が経時的に低下することを抑制することができる。上記観点から、表面開口率は、好ましくは１．１０％以上であり、そして、好ましくは１．４０％以下、より好ましくは１．３０％以下である。
疑似接着紙用原紙の疑似接着剤が付与される面における表面開口率は、次のように求められる。疑似接着紙用原紙において、疑似接着剤が付与される面の表面画像をＳＥＭにより取得し、画像解析ソフトで読み込んで２５６階調に分級し、濃度値と度数とのヒストグラムにおいて、度数が最も大きくなる濃度値から６０を引いた値を閾値として設定し、２５６階調に分級した疑似接着剤が付与される面の表面画像を２値化した際の黒色部分（開口部）の面積を３回測定して、表面画像全体の面積に占める黒色部分（開口部）の面積率を算出し、その平均値を表面開口率とする。
なお、疑似接着紙用原紙の表面開口率は、原料パルプの種類およびＣＳＦ、疑似接着紙用原紙を構成する繊維の平均繊維長およびルンケル比等を変更することにより調整することができる。
<Characteristics of base paper for pseudo-adhesive paper>
(Surface aperture ratio)
The surface aperture ratio of the base paper for pseudo-adhesive paper on the surface to which the pseudo-adhesive is applied is 1.00% or more and 1.50% or less. When the surface opening ratio is within the above range, the pseudo-adhesive layer is sufficiently formed, and it is possible to prevent the pseudo-adhesive from excessively penetrating into the base paper for pseudo-adhesive paper. Can be suppressed from decreasing over time. From the above viewpoint, the surface aperture ratio is preferably 1.10% or more, preferably 1.40% or less, and more preferably 1.30% or less.
The surface aperture ratio of the base paper for pseudo-adhesive paper on the surface to which the pseudo-adhesive is applied is determined as follows. In the base paper for pseudo-adhesive paper, the surface image of the surface to which the pseudo-adhesive is applied is acquired by SEM, read by image analysis software, classified into 256 gradations, and the frequency is the largest in the histogram of the density value and the frequency. The value obtained by subtracting 60 from the density value is set as the threshold value, and the area of the black portion (opening) when the surface image of the surface to which the pseudo-adhesive classified into 256 gradations is applied is binarized three times. The area ratio of the black portion (opening) to the total area of the surface image is calculated, and the average value is used as the surface aperture ratio.
The surface opening ratio of the base paper for pseudo-adhesive paper can be adjusted by changing the type and CSF of the raw material pulp, the average fiber length of the fibers constituting the base paper for pseudo-adhesive paper, the Runkel ratio, and the like.
（厚さ）
疑似接着紙用原紙の厚さは、３５μｍ以上１００μｍ以下であることが好ましい。厚さが上記範囲内であると、疑似接着紙用原紙が用いられる疑似接着紙を配送伝票用紙等に好適に用いることができる。上記観点から、厚さは、より好ましくは４２μｍ以上、さらに好ましくは５０μｍ以上であり、そして、より好ましくは８０μｍ以下、さらに好ましくは７０μｍ以下、よりさらに好ましくは６０μｍ以下である。
疑似接着紙用原紙の厚さは、ＪＩＳ Ｐ ８１１８：２０１４に準拠して測定される。
(thickness)
The thickness of the base paper for pseudo-adhesive paper is preferably 35 μm or more and 100 μm or less. When the thickness is within the above range, the pseudo-adhesive paper for which the base paper for pseudo-adhesive paper is used can be suitably used for the delivery slip paper and the like. From the above viewpoint, the thickness is more preferably 42 μm or more, further preferably 50 μm or more, and more preferably 80 μm or less, still more preferably 70 μm or less, still more preferably 60 μm or less.
The thickness of the base paper for pseudo-adhesive paper is measured according to JIS P 8118: 2014.
（坪量）
疑似接着紙用原紙の坪量は、３０ｇ／ｍ２以上１００ｇ／ｍ２未満であることが好ましい。坪量が上記範囲内であると、疑似接着紙用原紙が用いられる疑似接着紙を配送伝票用紙等に好適に用いることができる。上記観点から、坪量は、より好ましくは３５ｇ／ｍ２以上、さらに好ましくは４０ｇ／ｍ２以上であり、そして、より好ましくは９０ｇ／ｍ２以下、さらに好ましくは７０ｇ／ｍ２以下、よりさらに好ましくは５０ｇ／ｍ２以下である。
疑似接着紙用原紙の坪量は、ＪＩＳ Ｐ ８１２４：２０１１に準拠して測定される。
(Basis weight)
The basis weight of the base paper for pseudo-adhesive paper is preferably 30 g / m 2 or more and less than 100 g / m 2. When the basis weight is within the above range, the pseudo-adhesive paper for which the base paper for pseudo-adhesive paper is used can be suitably used for the delivery slip paper and the like. From the above viewpoint, the basis weight is more preferably 35 g / m 2 or more, further preferably 40 g / m 2 or more, and more preferably 90 g / m 2 or less, still more preferably 70 g / m 2 or less, still more. It is preferably 50 g / m 2 or less.
The basis weight of the base paper for pseudo-adhesive paper is measured in accordance with JIS P 8124: 2011.
（内部結合強さ）
疑似接着紙用原紙の内部結合強さは、疑似接着剤層に疑似接着される被接着体を剥がす際に、疑似接着紙が層間剥離することを抑制する観点から、好ましくは２５０Ｊ／ｍ２以上、より好ましくは４００Ｊ／ｍ２以上、さらに好ましくは５００Ｊ／ｍ２以上であり、よりさらに好ましくは６００Ｊ／ｍ２以上であり、その上限は、層間剥離が十分に抑制され、原料パルプと紙料を調製するコストを下げるといった経済性の観点から、好ましくは７５０Ｊ／ｍ２以下である。
疑似接着紙用原紙の内部結合強さは、ＪＡＰＡＮ ＴＡＰＰＩ Ｎｏ．１８−２：２０００に準拠して測定される。
(Internal bond strength)
The internal bonding strength of the base paper for pseudo-adhesive paper is preferably 250 J / m 2 or more from the viewpoint of suppressing delamination of the pseudo-adhesive paper when the adherend to be pseudo-adhesive to the pseudo-adhesive layer is peeled off. , more preferably 400 J / m 2 or more, more preferably 500 J / m 2 or more, more further preferably 600 J / m 2 or more, the upper limit is, delamination is adequately suppressed, pulp and stock From the viewpoint of economic efficiency such as reducing the cost of preparing the above, it is preferably 750 J / m 2 or less.
The internal bond strength of the base paper for pseudo-adhesive paper is determined by Japan TAPPI No. Measured according to 18-2: 2000.
［疑似接着紙］
疑似接着紙は、疑似接着紙用原紙の片面側のみに、疑似接着剤から形成される疑似接着剤層を有することが好ましいが、疑似接着紙用原紙の両面に疑似接着剤層を有していてもよい。疑似接着紙は、疑似接着紙用原紙上に形成された疑似接着剤層に被接着体を剥離可能に疑似接着することができる。なお、疑似接着紙には、上述した疑似接着紙用原紙を用いることができる。
[Pseudo adhesive paper]
The pseudo-adhesive paper preferably has a pseudo-adhesive layer formed from the pseudo-adhesive only on one side of the base paper for the pseudo-adhesive paper, but has pseudo-adhesive layers on both sides of the base paper for the pseudo-adhesive paper. You may. The pseudo-adhesive paper can be pseudo-adhesive to the pseudo-adhesive layer formed on the base paper for the pseudo-adhesive paper so that the adherend can be peeled off. As the pseudo-adhesive paper, the above-mentioned base paper for pseudo-adhesive paper can be used.
＜疑似接着剤＞
本発明の疑似接着剤層を形成する疑似接着剤は、基剤として、好ましくはアクリル系接着剤、酢酸ビニル系接着剤、およびゴム系接着剤のいずれか１種以上を含有し、より好ましくはアクリル系接着剤、および酢酸ビニル系接着剤のいずれか１種以上を含有する。
<Pseudo adhesive>
The pseudo-adhesive forming the pseudo-adhesive layer of the present invention preferably contains at least one of an acrylic adhesive, a vinyl acetate adhesive, and a rubber adhesive as a base, and more preferably. Contains any one or more of an acrylic adhesive and a vinyl acetate adhesive.
疑似接着剤は、微粒子充填剤を含むことが好ましい。微粒子充填剤としては、合成シリカ、澱粉、タルクが好ましく、合成シリカと澱粉とを併用することがより好ましい。
微粒子充填剤として、合成シリカと澱粉とを併用する場合、疑似接着剤は、アクリル系接着剤、および酢酸ビニル系接着剤のいずれか１種以上を６５質量％以上８５質量％以下、合成シリカを１２．５質量％以上３２．５質量％以下、かつ、澱粉を０．５質量％以上２．５質量％以下含有することが好ましい。疑似接着剤中の各成分の含有量を上記範囲内にすると、接着力、加工性等に優れる。
The pseudo-adhesive preferably contains a fine particle filler. As the fine particle filler, synthetic silica, starch, and talc are preferable, and it is more preferable to use synthetic silica and starch in combination.
When synthetic silica and starch are used in combination as the fine particle filler, the pseudo-adhesive is 65% by mass or more and 85% by mass or less of any one or more of an acrylic adhesive and a vinyl acetate adhesive, and synthetic silica. It is preferable that the starch is contained in an amount of 12.5% by mass or more and 32.5% by mass or less and 0.5% by mass or more and 2.5% by mass or less. When the content of each component in the pseudo-adhesive is within the above range, the adhesive strength, workability and the like are excellent.
微粒子充填剤として、合成シリカと澱粉とを併用する場合、合成シリカの平均粒子径が０．２μｍ以上３．０μｍ以下であり、かつ、澱粉の平均粒子径が７．０μｍ以上１５．０μｍ以下であることが好ましい。平均粒子径が上記範囲内であると、接着力、加工性等に優れる。
微粒子充填剤としてタルクを用いる場合、タルクの平均粒子径は、２．０μｍ以上５．０μｍ以下であることが好ましい。平均粒子径が上記範囲内であると、接着力、加工性等に優れる。
When synthetic silica and starch are used in combination as the fine particle filler, the average particle size of the synthetic silica is 0.2 μm or more and 3.0 μm or less, and the average particle size of the starch is 7.0 μm or more and 15.0 μm or less. It is preferable to have. When the average particle size is within the above range, the adhesive strength, workability and the like are excellent.
When talc is used as the fine particle filler, the average particle size of talc is preferably 2.0 μm or more and 5.0 μm or less. When the average particle size is within the above range, the adhesive strength, workability and the like are excellent.
［疑似接着紙の製造方法］
疑似接着紙は、疑似接着紙用原紙上に疑似接着剤層を形成することにより得られる。疑似接着紙用原紙に疑似接着剤層を形成する方法は、特に限定されず、疑似接着紙用原紙に、疑似接着剤を塗布する方式、フィルム状にした疑似接着剤を圧着する方式、疑似接着剤を紫外線硬化型ワニス組成物として塗布した後に紫外線を照射して硬化させる方式等を採用することができる。
[Manufacturing method of pseudo-adhesive paper]
The pseudo-adhesive paper is obtained by forming a pseudo-adhesive layer on a base paper for pseudo-adhesive paper. The method of forming the pseudo-adhesive layer on the base paper for pseudo-adhesive paper is not particularly limited, and is a method of applying the pseudo-adhesive to the base paper for pseudo-adhesive paper, a method of crimping the pseudo-adhesive in the form of a film, and pseudo-adhesion. A method of applying the agent as an ultraviolet curable varnish composition and then irradiating the agent with ultraviolet rays to cure the agent can be adopted.
上述したように、本発明の疑似接着紙は、加圧により、疑似接着剤層上に被接着体を剥離可能に疑似接着することができる。本発明の疑似接着紙は、たとえば被接着体としてラベル紙を備える配送伝票用紙に用いることができる。 As described above, the pseudo-adhesive paper of the present invention can be pseudo-adhesive on the pseudo-adhesive layer so that the object to be adhered can be peeled off by applying pressure. The pseudo-adhesive paper of the present invention can be used, for example, as a delivery slip paper provided with a label paper as an object to be adhered.
（接着力（引きはがし粘着力））
被接着体としてラベル紙を疑似接着加工した直後の疑似接着紙とラベル紙との引きはがし粘着力は、ラベル紙が意図しないときに剥がれてしまうことを防ぐ観点から、好ましくは０．４０Ｎ／５０ｍｍ以上、より好ましくは０．５０Ｎ／５０ｍｍ以上、さらに好ましくは０．６０Ｎ／５０ｍｍ以上、よりさらに好ましくは０．７０Ｎ／５０ｍｍ以上である。
促進試験後の疑似接着紙とラベル紙との引きはがし粘着力は、ラベル紙が意図しないときに剥がれてしまうことを防ぐ観点から、好ましくは０．４０Ｎ／５０ｍｍ以上、より好ましくは０．４５Ｎ／５０ｍｍ以上であり、その上限は、ラベル紙を剥がす際に、ラベル紙の破れ、層間剥離、およびカールを防ぎ、取り扱いやすくする観点から、好ましくは０．５５Ｎ／５０ｍｍ以下である。
疑似接着紙とラベル紙との引きはがし粘着力は、ＪＩＳ Ｚ ０２３７：２００９に準拠して測定される。なお、促進試験は、ラベル紙が疑似接着された疑似接着紙を、４０℃、かつ９０％ＲＨの条件下で７日間放置して行う。
(Adhesive strength (peeling adhesive strength))
The peeling adhesive strength between the pseudo-adhesive paper and the label paper immediately after the label paper is pseudo-adhesively processed as the adherend is preferably 0.40 N / 50 mm from the viewpoint of preventing the label paper from peeling off unintentionally. As described above, it is more preferably 0.50 N / 50 mm or more, further preferably 0.60 N / 50 mm or more, and even more preferably 0.70 N / 50 mm or more.
The peeling adhesive strength between the pseudo-adhesive paper and the label paper after the accelerated test is preferably 0.40 N / 50 mm or more, more preferably 0.45 N /, from the viewpoint of preventing the label paper from peeling off unintentionally. It is 50 mm or more, and the upper limit thereof is preferably 0.55 N / 50 mm or less from the viewpoint of preventing tearing, delamination, and curling of the label paper and facilitating handling when the label paper is peeled off.
The peeling adhesive strength between the pseudo-adhesive paper and the label paper is measured according to JIS Z 0237: 2009. The accelerated test is carried out by leaving the pseudo-adhesive paper to which the label paper is pseudo-adhered under the conditions of 40 ° C. and 90% RH for 7 days.
［配送伝票用紙］
配送伝票用紙は、疑似接着紙の疑似接着剤層面側にラベル紙を備え、疑似接着剤層の反対面側に粘着剤、剥離紙が順次積層されることが好ましい。より詳しくは、配送伝票用紙の最表面がラベル紙であり、ラベル紙の下に疑似接着紙、粘着剤および剥離紙が順次積層されることが好ましい。なお、配送伝票用紙には、上述した疑似接着紙を用いることができる。
[Delivery slip form]
It is preferable that the delivery slip paper is provided with a label paper on the pseudo-adhesive layer side of the pseudo-adhesive paper, and the adhesive and the release paper are sequentially laminated on the opposite surface side of the pseudo-adhesive layer. More specifically, it is preferable that the outermost surface of the delivery slip paper is the label paper, and the pseudo-adhesive paper, the adhesive, and the release paper are sequentially laminated under the label paper. The above-mentioned pseudo-adhesive paper can be used as the delivery slip paper.
ラベル紙は、特に限定されず、印刷が施された感熱紙であってもよいし、配送伝票用紙が製造された後に印刷が施されるものであってもよいし、無地の普通紙であってもよい。 The label paper is not particularly limited, and may be printed thermal paper, may be printed after the delivery slip paper is manufactured, or may be plain plain paper. You may.
粘着剤としては、特に限定されないが、たとえば合成樹脂系粘着剤、合成ゴム系粘着剤等が挙げられる。粘着剤は、疑似接着紙の疑似接着剤層が形成されていない面に付与されることが好ましい。粘着剤を疑似接着紙に付与する方法は、特に限定されず、公知の方法を採用することができる。 The pressure-sensitive adhesive is not particularly limited, and examples thereof include synthetic resin-based pressure-sensitive adhesives and synthetic rubber-based pressure-sensitive adhesives. The pressure-sensitive adhesive is preferably applied to the surface of the pseudo-adhesive paper on which the pseudo-adhesive layer is not formed. The method of applying the pressure-sensitive adhesive to the pseudo-adhesive paper is not particularly limited, and a known method can be adopted.
剥離紙は、配送伝票用紙の状態では粘着剤に粘着しており、配送伝票用紙が使用される荷物等の被貼付体に配送伝票用紙が貼付される際に、粘着剤から剥離可能なものであればよい。 The release paper is adhered to the adhesive in the state of the delivery slip paper, and can be peeled off from the adhesive when the delivery slip paper is attached to the attached body such as a package on which the delivery slip paper is used. All you need is.
以下に実施例と比較例とを挙げて本発明の特徴をさらに具体的に説明する。以下の実施例に示す材料、使用量、割合、処理内容、処理手順等は、本発明の趣旨を逸脱しない限り適宜変更することができる。したがって、本発明の範囲は以下に示す具体例により限定的に解釈されるべきものではない。 Hereinafter, the features of the present invention will be described in more detail with reference to Examples and Comparative Examples. The materials, amounts used, ratios, treatment contents, treatment procedures, etc. shown in the following examples can be appropriately changed as long as they do not deviate from the gist of the present invention. Therefore, the scope of the present invention should not be construed in a limited manner by the specific examples shown below.
［評価および分析］
実施例および比較例の原料パルプ、疑似接着紙用原紙、および疑似接着紙について、以下の評価および分析を行った。
[Evaluation and analysis]
The raw material pulps, base papers for pseudo-adhesive paper, and pseudo-adhesive paper of Examples and Comparative Examples were evaluated and analyzed as follows.
＜原料パルプ＞
（カナダ標準ろ水度（ＣＳＦ）の測定）
原料パルプのカナダ標準ろ水度（ＣＳＦ）は、ＪＩＳ Ｐ ８１２１−２：２０１２に準拠して測定した。
<Raw material pulp>
(Measurement of Canadian Standard Water freshness (CSF))
The Canadian Standard Water Freeness (CSF) of the raw material pulp was measured according to JIS P 811-2: 2012.
＜疑似接着紙用原紙＞
（表面開口率）
表面開口率は、疑似接着紙用原紙において、疑似接着剤が付与される面の表面画像を、（株）日立ハイテクノロジーズ製の「走査電子顕微鏡 Ｓ−３６００Ｎ」により取得し、（株）アイスペック製の画像解析ソフト「ＩＯＭａｔｅ２００７」で読み込んで２５６階調に分級し、濃度値と度数とのヒストグラムにおいて、度数が最も大きくなる濃度値から６０を引いた値を閾値として設定し、２５６階調に分級した疑似接着剤が付与される面の表面画像を２値化した際の黒色部分（開口部）の面積を３回測定して、表面画像全体の面積（１．７２ｍｍ×２．５６ｍｍ）に占める黒色部分（開口部）の面積率を算出し、その平均値を表面開口率とした。
<Base paper for pseudo adhesive paper>
(Surface aperture ratio)
For the surface aperture ratio, the surface image of the surface to which the pseudo-adhesive is applied in the base paper for pseudo-adhesive is acquired by "scanning electron microscope S-3600N" manufactured by Hitachi High-Technologies Co., Ltd., and Eye Spec Co., Ltd. It is read by the image analysis software "IOMate 2007" manufactured by Japan, and classified into 256 gradations. In the histogram of the density value and the frequency, the value obtained by subtracting 60 from the density value at which the frequency is the largest is set as the threshold value, and the gradation is 256. The area of the black part (opening) when the surface image of the surface to which the classified pseudo-adhesive is applied is binarized is measured three times to obtain the total area of the surface image (1.72 mm × 2.56 mm). The area ratio of the black part (opening) occupied was calculated, and the average value was taken as the surface aperture ratio.
（厚さ）
疑似接着紙用原紙の厚さは、ＪＩＳ Ｐ ８１１８：２０１４に準拠して測定した。
(thickness)
The thickness of the base paper for pseudo-adhesive paper was measured according to JIS P 8118: 2014.
（坪量）
疑似接着紙用原紙の坪量は、ＪＩＳ Ｐ ８１２４：２０１１に準拠して測定した。
(Basis weight)
The basis weight of the base paper for pseudo-adhesive paper was measured according to JIS P 8124: 2011.
（密度）
上述した測定方法により得られた厚さおよび坪量から、疑似接着紙用原紙の密度を算出した。
(density)
The density of the base paper for pseudo-adhesive paper was calculated from the thickness and basis weight obtained by the above-mentioned measurement method.
（内部結合強さ）
疑似接着紙用原紙の内部結合強さは、ＪＡＰＡＮ ＴＡＰＰＩ Ｎｏ．１８−２：２０００に準拠して測定した。
(Internal bond strength)
The internal bond strength of the base paper for pseudo-adhesive paper is determined by Japan TAPPI No. Measured according to 18-2: 2000.
＜疑似接着紙＞
（平均繊維長の測定）
疑似接着紙用原紙を構成する繊維の平均繊維長は、ＪＩＳ Ｐ ８２２０−１：２０１２に準拠して疑似接着紙を離解し、メッツォ社製の繊維長測定装置「カヤーニファイバーラボＶｅｒ４．０」を用いて、離解した繊維の繊維長を２回測定し、その平均値を、疑似接着紙用原紙を構成する繊維の平均繊維長とした。
<Pseudo adhesive paper>
(Measurement of average fiber length)
The average fiber length of the fibers that make up the base paper for pseudo-adhesive paper is based on JIS P 822-1: 2012. The fiber length of the separated fibers was measured twice, and the average value was taken as the average fiber length of the fibers constituting the base paper for pseudo-adhesive paper.
（ルンケル比）
疑似接着紙用原紙を構成する繊維のルンケル比は、ＪＩＳ Ｐ ８２２０−１：２０１２に準拠して疑似接着紙を離解し、メッツォ社製の繊維長測定装置「カヤーニファイバーラボＶｅｒ４．０」を用いて、離解した繊維の繊維壁厚およびルーメン径を２回測定し、下記式によりルンケル比を算出し、その平均値を、疑似接着紙用原紙を構成する繊維のルンケル比とした。
ルンケル比＝繊維壁厚×２／ルーメン径
(Runkel ratio)
The runkel ratio of the fibers that make up the base paper for pseudo-adhesive paper is based on JIS P 822-1: 2012, and the pseudo-adhesive paper is separated and the fiber length measuring device "Kayani Fiber Lab Ver4.0" manufactured by Mezzo is used. Then, the fiber wall thickness and the lumen diameter of the separated fibers were measured twice, the runkel ratio was calculated by the following formula, and the average value was taken as the runkel ratio of the fibers constituting the base paper for pseudo-adhesive paper.
Runkel ratio = fiber wall thickness x 2 / lumen diameter
（接着力（引きはがし粘着力））
王子イメージングメディア（株）製のラベル紙「ＰＤ１５１ＤＬ」（坪量：６５ｇ／ｍ２）を疑似接着加工した直後の疑似接着紙とラベル紙との引きはがし粘着力は、ＪＩＳ Ｚ ０２３７：２００９に準拠して測定した。
また、促進試験後の疑似接着紙とラベル紙との引きはがし粘着力は、王子イメージングメディア（株）製のラベル紙「ＰＤ１５１ＤＬ」（坪量：６５ｇ／ｍ２）が疑似接着された疑似接着紙を、４０℃、かつ９０％ＲＨの条件下で７日間放置し、ＪＩＳ Ｚ ０２３７：２００９に準拠して測定を行った。
(Adhesive strength (peeling adhesive strength))
The peeling adhesive strength between the pseudo-adhesive paper and the label paper immediately after the label paper "PD151DL" (basis weight: 65 g / m 2) manufactured by Oji Imaging Media Co., Ltd. is pseudo-adhesive is based on JIS Z 0237: 2009. And measured.
In addition, the peeling adhesive strength between the pseudo-adhesive paper and the label paper after the accelerated test is the pseudo-adhesive paper on which the label paper "PD151DL" (basis weight: 65 g / m 2 ) manufactured by Oji Imaging Media Co., Ltd. is pseudo-bonded. Was left for 7 days under the conditions of 40 ° C. and 90% RH, and the measurement was performed in accordance with JIS Z 0237: 2009.
［実施例１］
＜疑似接着紙用原紙の製造＞
広葉樹晒クラフトパルプ８０質量％、および針葉樹晒クラフトパルプ２０質量％からなる原料パルプをＪＩＳ Ｐ ８１２１−２：２０１２に準拠して測定されるカナダ標準ろ水度（ＣＳＦ）が４００ｍＬとなるように調製し、原料パルプ（絶乾質量）１００質量部に対して、カチオン化澱粉（ピラーＰ３Ｙ、ピラースターチ（PIRAAB STARCH）社製）０．２質量部を添加して紙料を調製し、該紙料をメッツォ製の長網抄紙機により抄紙し、乾燥して疑似接着紙用原紙Ａを作製した。得られた疑似接着紙用原紙Ａについて、表面開口率、厚さ、坪量、および内部結合強さの測定、ならびに密度の算出を行った。その結果を表１に示す。
＜疑似接着紙の製造＞
アクリル系接着剤を７６質量％、合成シリカ（平均粒子径：１．３μｍ）を２２．３質量％、澱粉（平均粒子径：１２．４μｍ）を１．７質量％含有する疑似接着剤を、疑似接着紙用原紙Ａの片面にバーコーター（１０番手）を用いて塗布し、疑似接着紙１を作製した。得られた疑似接着紙１について、疑似接着紙用原紙Ａを構成する繊維の平均繊維長およびルンケル比、ならびに得られた疑似接着紙１とラベル紙との接着力の測定を行った。その結果を表１に示す。
[Example 1]
<Manufacturing of base paper for pseudo-adhesive paper>
Raw material pulp consisting of 80% by mass of bleached broadleaf kraft pulp and 20% by mass of bleached coniferous kraft pulp was prepared so that the Canadian standard freshness (CSF) measured in accordance with JIS P 811-2: 2012 was 400 mL. Then, 0.2 parts by mass of cationized starch (Pillar P3Y, manufactured by PIRAAB STARCH) was added to 100 parts by mass of the raw material pulp (absolute dry mass) to prepare a paper material, and the paper material was prepared. Was made with a long net paper machine manufactured by Mezzo and dried to prepare a base paper A for pseudo-adhesive paper. The surface aperture ratio, thickness, basis weight, and internal bond strength of the obtained base paper A for pseudo-adhesive paper were measured, and the density was calculated. The results are shown in Table 1.
<Manufacturing of pseudo-adhesive paper>
A pseudo-adhesive containing 76% by mass of acrylic adhesive, 22.3% by mass of synthetic silica (average particle size: 1.3 μm), and 1.7% by mass of starch (average particle size: 12.4 μm). A bar coater (10th count) was applied to one side of the base paper A for pseudo-adhesive paper to prepare pseudo-adhesive paper 1. With respect to the obtained pseudo-adhesive paper 1, the average fiber length and runkel ratio of the fibers constituting the base paper A for pseudo-adhesive paper, and the adhesive strength between the obtained pseudo-adhesive paper 1 and the label paper were measured. The results are shown in Table 1.
［実施例２］
実施例１において、広葉樹晒クラフトパルプ８３質量％、および針葉樹晒クラフトパルプ１７質量％からなる原料パルプを用いて、ＣＳＦが４４０ｍＬとなるように調製し、疑似接着紙用原紙Ｂの表面開口率を１．２６％とした以外は、実施例１と同様にして疑似接着紙用原紙Ｂおよび疑似接着紙２を作製し、実施例１と同様に測定等を行った。その結果を表１に示す。
[Example 2]
In Example 1, a raw material pulp composed of 83% by mass of bleached broad-leaved kraft pulp and 17% by mass of bleached softwood kraft pulp was used to prepare a CSF of 440 mL, and the surface opening ratio of the base paper B for pseudo-adhesive paper was adjusted. A base paper B for pseudo-adhesive paper and a pseudo-adhesive paper 2 were produced in the same manner as in Example 1 except that the ratio was 1.26%, and measurements and the like were carried out in the same manner as in Example 1. The results are shown in Table 1.
［比較例１］
実施例１において、ＣＳＦが４８０ｍＬとなるように調製し、疑似接着紙用原紙Ｃの表面開口率を１．８９％とした以外は、実施例１と同様にして疑似接着紙用原紙Ｃおよび疑似接着紙３を作製し、実施例１と同様に測定等を行った。その結果を表１に示す。
[Comparative Example 1]
In Example 1, the pseudo-adhesive paper base paper C and the pseudo-adhesive paper base paper C and the pseudo-adhesive paper base paper C were prepared in the same manner as in Example 1 except that the CSF was adjusted to 480 mL and the surface aperture ratio of the pseudo-adhesive paper base paper C was 1.89%. Adhesive paper 3 was prepared, and measurement and the like were carried out in the same manner as in Example 1. The results are shown in Table 1.
［比較例２］
実施例１において、広葉樹晒クラフトパルプ７０質量％、および針葉樹晒クラフトパルプ３０質量％からなる原料パルプを用いて、ＣＳＦが４３０ｍＬとなるように調製し、疑似接着紙用原紙Ｄの表面開口率を１．７４％とした以外は、実施例１と同様にして疑似接着紙用原紙Ｄおよび疑似接着紙４を作製し、実施例１と同様に測定等を行った。その結果を表１に示す。
[Comparative Example 2]
In Example 1, a raw material pulp composed of 70% by mass of bleached broad-leaved kraft pulp and 30% by mass of bleached softwood kraft pulp was used to prepare a CSF of 430 mL, and the surface opening ratio of the base paper D for pseudo-adhesive paper was adjusted. A base paper D for pseudo-adhesive paper and a pseudo-adhesive paper 4 were produced in the same manner as in Example 1 except that the ratio was 1.74%, and measurements and the like were carried out in the same manner as in Example 1. The results are shown in Table 1.
［比較例３］
実施例１において、広葉樹晒クラフトパルプ７５質量％、および針葉樹晒クラフトパルプ２５質量％からなる原料パルプを用いて、ＣＳＦが４３０ｍＬとなるように調製し、疑似接着紙用原紙Ｅの表面開口率を１．８２％とした以外は、実施例１と同様にして疑似接着紙用原紙Ｅおよび疑似接着紙５を作製し、実施例１と同様に測定等を行った。その結果を表１に示す。
[Comparative Example 3]
In Example 1, a raw material pulp composed of 75% by mass of broad-leaved bleached kraft pulp and 25% by mass of softwood bleached kraft pulp was used to prepare a CSF of 430 mL, and the surface opening ratio of the base paper E for pseudo-adhesive paper was adjusted. A base paper E for pseudo-adhesive paper and a pseudo-adhesive paper 5 were produced in the same manner as in Example 1 except that the ratio was 1.82%, and measurements and the like were carried out in the same manner as in Example 1. The results are shown in Table 1.
［比較例４］
実施例１において、広葉樹晒クラフトパルプ９０質量％、および針葉樹晒クラフトパルプ１０質量％からなる原料パルプを用いて、ＣＳＦが３７５ｍＬとなるように調製し、疑似接着紙用原紙Ｆの表面開口率を０．９６％とした以外は、実施例１と同様にして疑似接着紙用原紙Ｆおよび疑似接着紙６を作製し、実施例１と同様に測定等を行った。その結果を表１に示す。
[Comparative Example 4]
In Example 1, a raw material pulp composed of 90% by mass of bleached broad-leaved kraft pulp and 10% by mass of bleached softwood kraft pulp was used to prepare a CSF of 375 mL, and the surface opening ratio of the base paper F for pseudo-adhesive paper was adjusted. A base paper F for pseudo-adhesive paper and a pseudo-adhesive paper 6 were produced in the same manner as in Example 1 except that the ratio was 0.96%, and measurements and the like were carried out in the same manner as in Example 1. The results are shown in Table 1.
実施例および比較例の結果から、本発明の疑似接着紙用原紙および疑似接着紙によれば、接着力の経時的な低下を抑制することができていることがわかる。 From the results of Examples and Comparative Examples, it can be seen that the base paper for pseudo-adhesive paper and the pseudo-adhesive paper of the present invention can suppress a decrease in adhesive strength with time.
本発明の疑似接着紙は、接着力の経時的な低下を抑制することができるため、配送伝票用紙等に好適に使用できる。 Since the pseudo-adhesive paper of the present invention can suppress a decrease in adhesive strength with time, it can be suitably used for delivery slip paper and the like.
Claims (10)
疑似接着剤が付与される面における表面開口率が、１．００％以上１．５０％以下である、疑似接着紙用原紙。 A base paper for pseudo-adhesive paper used for pseudo-adhesive paper that is pseudo-adhesive so that it can be peeled off by pressure.
A base paper for pseudo-adhesive paper having a surface aperture ratio of 1.00% or more and 1.50% or less on the surface to which the pseudo-adhesive is applied.
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| JP7255723B1 (en) | 2022-03-16 | 2023-04-11 | 王子ホールディングス株式会社 | Interleaving paper and processed paper products obtained by processing said interleaving paper |
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| JP7255723B1 (en) | 2022-03-16 | 2023-04-11 | 王子ホールディングス株式会社 | Interleaving paper and processed paper products obtained by processing said interleaving paper |
| JP2023135996A (en) * | 2022-03-16 | 2023-09-29 | 王子ホールディングス株式会社 | Laminated paper and paper products obtained by processing the laminated paper |
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