JP6095503B2 - Rolled core paper tube for toilet paper roll - Google Patents
Rolled core paper tube for toilet paper roll Download PDFInfo
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- JP6095503B2 JP6095503B2 JP2013133007A JP2013133007A JP6095503B2 JP 6095503 B2 JP6095503 B2 JP 6095503B2 JP 2013133007 A JP2013133007 A JP 2013133007A JP 2013133007 A JP2013133007 A JP 2013133007A JP 6095503 B2 JP6095503 B2 JP 6095503B2
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- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 24
- 229910052782 aluminium Inorganic materials 0.000 claims description 15
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 claims description 10
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 239000001630 malic acid Substances 0.000 claims description 10
- 235000011090 malic acid Nutrition 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 5
- 239000000123 paper Substances 0.000 description 79
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 19
- 239000002585 base Substances 0.000 description 18
- 230000001877 deodorizing effect Effects 0.000 description 13
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 12
- 239000000126 substance Substances 0.000 description 10
- 229910021529 ammonia Inorganic materials 0.000 description 9
- 230000002378 acidificating effect Effects 0.000 description 6
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 5
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 5
- -1 aluminum ions Chemical class 0.000 description 5
- 229910017604 nitric acid Inorganic materials 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000002781 deodorant agent Substances 0.000 description 3
- 239000003205 fragrance Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000003618 dip coating Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000003094 microcapsule Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 229920001131 Pulp (paper) Polymers 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
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 238000001139 pH measurement Methods 0.000 description 1
- 239000013054 paper strength agent Substances 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000013055 pulp slurry Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000007787 solid 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
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- Storage Of Web-Like Or Filamentary Materials (AREA)
- Sanitary Thin Papers (AREA)
Description
本発明は、トイレットペーパーロール用巻芯紙管に関する。特に、消臭効果を有するトイレットペーパーロール用巻芯紙管に関する。 The present invention relates to a core paper tube for a toilet paper roll. In particular, the present invention relates to a core paper tube for toilet paper roll having a deodorizing effect.
従来から、トイレ内の環境改善のために、トイレットペーパーロールに使用される紙管に芳香剤、香料、消臭剤、脱臭剤などを付与し、トイレ内を好ましい香りに置き換える、あるいは好ましくない臭いを脱臭・中和することが行われている。
特許文献１には、芳香物質及び／又は消臭物質を内包するマイクロカプセルを含有させた紙管を芯としたロール状シートが開示されている。
Conventionally, in order to improve the environment in the toilet, a fragrance, a fragrance, a deodorant, a deodorant, etc. are given to the paper tube used in the toilet paper roll to replace the toilet with a preferred scent or an unpleasant smell Is deodorized and neutralized.
Patent Document 1 discloses a roll sheet having a paper tube containing a microcapsule containing a fragrance and / or deodorant as a core.
特許文献１に開示されている紙管は含有されているマイクロカプセルに所定の荷重が付与されたときに、芳香効果あるいは消臭効果を発現する。このため、所定の荷重がかかりにくい状態で使用した場合には、芳香効果あるいは消臭効果が全く発現しない問題があった。
そこで、本発明は、トイレットペーパーロールの使用状態に拘らず、消臭効果を発現するトイレットペーパーロール用巻芯紙管を提供することを目的とする。
The paper tube disclosed in Patent Document 1 exhibits an aroma effect or a deodorizing effect when a predetermined load is applied to the contained microcapsules. For this reason, when it was used in a state where it is difficult to apply a predetermined load, there was a problem that no aroma effect or deodorizing effect was exhibited.
Then, an object of this invention is to provide the core paper tube for toilet paper rolls which express a deodorizing effect irrespective of the use condition of a toilet paper roll.
上記課題を解決するための第１の発明は、トイレットペーパーロールの巻芯紙管において、該巻芯紙管の紙面ｐＨが３．５以下であることを特徴とする。第２の発明は、前記巻芯紙管中のアルミニウム含有量が３００〜１０００ｐｐｍであることを特徴とする。第３の発明は、巻芯紙管にリンゴ酸及び又はクエン酸を０．０５〜０．５ｇ／ｍ2塗布することを特徴とする。第４の発明は、トイレットペーパーロールであって、上記巻芯紙管を芯としたことを特徴とする。 A first invention for solving the above-described problems is characterized in that the core paper tube of the toilet paper roll has a paper surface pH of 3.5 or less in the core paper tube. 2nd invention is characterized by the aluminum content in the said core paper tube being 300-1000 ppm. The third invention is characterized in that 0.05 to 0.5 g / m 2 of malic acid and / or citric acid is applied to the core paper tube. 4th invention is a toilet paper roll, Comprising: The said core paper tube was used as the core, It is characterized by the above-mentioned.
本発明によれば、トイレットペーパーロールの使用状態に拘らず、消臭効果を発現するトイレットペーパーロール用巻芯紙管を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the core paper tube for toilet paper rolls which express a deodorizing effect irrespective of the use condition of a toilet paper roll can be provided.
本発明の紙面ｐＨを３．５以下にしたことを特徴とするトイレットペーパーロール用巻芯紙管（以下、「巻芯紙管」と略すことがある）は、トイレ内の悪臭、特にアンモニア臭に対して非常に高い効果を示す。 The core paper tube for toilet paper roll (hereinafter sometimes abbreviated as “core paper tube”) having a paper surface pH of 3.5 or less according to the present invention has a bad smell in the toilet, particularly an ammonia odor. Is very effective.
本発明において、巻芯紙管の紙面ｐＨを３．５以下にすることが重要であり、巻芯紙管の紙面ｐＨを３．０以下にすることがより好ましい。紙面ｐＨが３．５を超えると十分な効果を得ることができない。また、紙面ｐＨが低すぎると紙が劣化する問題が発生することがあるため、ｐＨは２．４以上であることが好ましい。
また、紙、板紙及びパルプ−水抽出液ｐＨの試験方法（JIS P 8133:1998）における抽出ｐＨとしては、冷水の場合ｐＨ５．０以下、熱水の場合ｐＨ４．５以下であることが好ましい。
In the present invention, it is important that the paper surface pH of the core paper tube is 3.5 or less, and it is more preferable that the paper surface pH of the core paper tube is 3.0 or less. When the paper surface pH exceeds 3.5, a sufficient effect cannot be obtained. Further, if the paper surface pH is too low, there may be a problem that the paper deteriorates, and therefore the pH is preferably 2.4 or more.
Further, the extraction pH in the paper, paperboard and pulp-water extract pH test method (JIS P 8133: 1998) is preferably pH 5.0 or less in the case of cold water and pH 4.5 or less in the case of hot water.
本発明において、トイレットペーパーロール用巻芯紙管は、紙面ｐＨを調整した巻芯紙管用の原紙（以下、「原紙」と略すことがある）を中空筒状に形成したものであり、その形成方法は特に限定されるものではないが、原紙をスパイラル巻きにして巻き間に接着剤を介して中空筒状に形成することが一般的である。なお、スパイラル巻きにして巻き間に接着剤を介して中空筒状に形成させた場合、貼り合わせる一方の原紙のみに紙面ｐＨを調整したものを使用することも可能である。 In the present invention, the core paper tube for a toilet paper roll is formed by forming a base paper for a core paper tube (hereinafter, sometimes abbreviated as “base paper”) with adjusted paper surface pH into a hollow cylindrical shape. The method is not particularly limited, but it is general that the base paper is spirally wound and formed into a hollow cylindrical shape via an adhesive between windings. In addition, when spirally wound and formed into a hollow cylindrical shape via an adhesive between the windings, it is possible to use only the one base paper to be bonded with the paper surface pH adjusted.
本発明において、原紙の紙面ｐＨを調整する方法は特に限定されないが、内添により紙面ｐＨを調整した原紙は、パルプスラリーに酸性物質、その他必要な薬品を添加した紙料を公知の方法を用いて抄造することで得ることができる。また、外添により紙面ｐＨを調整した原紙は、公知の方法で抄造した紙に、サイズプレス、カレンダーサイズプレス、ゲートロールコーター、エアナイフコーター、ブレードコーターなどの公知の塗布装置を用いて酸性物質を塗布することで得ることができる。 In the present invention, the method for adjusting the paper surface pH of the base paper is not particularly limited, but for the base paper whose paper surface pH is adjusted by internal addition, a known material is used in which a pulp slurry is added with an acidic substance and other necessary chemicals. Can be obtained by papermaking. In addition, the base paper whose paper surface pH is adjusted by external addition is applied to the paper made by a known method using an acidic substance by using a known coating apparatus such as a size press, a calendar size press, a gate roll coater, an air knife coater, a blade coater. It can be obtained by coating.
紙面ｐＨを調整するために使用される酸性物質は、酢酸、硫酸、塩酸、硝酸、リンゴ酸、クエン酸などの酸、硫酸アルミニウム、硝酸アルミニウム、塩化アルミニウムなどの化合物を例示することができるが、これらの物質に限定されるものではない。これらの化合物の中では製紙分野で汎用に使用される硫酸アルミニウム（硫酸バンド）を使用することが取り扱いの点などから好ましい。
なお、原紙の製造において、内添、外添する酸性物質の種類及び添加量などは、パルプの種類や酸性物質以外で必要に応じて添加する薬品の種類などにより、紙面ｐＨが異なるため、適宜調整することが好ましい。
Examples of the acidic substance used for adjusting the paper surface pH include acids such as acetic acid, sulfuric acid, hydrochloric acid, nitric acid, malic acid, and citric acid, and compounds such as aluminum sulfate, aluminum nitrate, and aluminum chloride. It is not limited to these substances. Among these compounds, it is preferable from the viewpoint of handling and the like to use aluminum sulfate (sulfuric acid band) which is widely used in the papermaking field.
In addition, in the production of base paper, the type and amount of acidic substances added internally and externally vary depending on the type of pulp and the type of chemicals added as necessary in addition to acidic substances. It is preferable to adjust.
本発明において、硫酸アルミニウム（硫酸バンド）、塩化アルミニウム、硝酸アルミニウムなどの水中でアルミニウムイオンに電離する化合物を酸性物質として使用した場合、巻芯紙管原紙中のアルミニウム含有量を３００〜１０００ｐｐｍになるように添加することが好ましい。なお、原紙の製造において、内添、外添するアルミニウム化合物の添加量などは、パルプの種類やアルミニウム化合物以外で必要に応じて添加する薬品の種類などにより、原紙中の歩留りが異なるため、適宜調整することが好ましい。
アルミニウム化合物とは、水中でアルミニウムイオンに電離する化合物であればよく、硫酸アルミニウム（硫酸バンド）、塩化アルミニウム、硝酸アルミニウムなどが例示できるが、製紙分野で汎用に使用される硫酸アルミニウムを使用することが取り扱いの点などから好ましい。
In the present invention, when a compound ionizing into aluminum ions in water such as aluminum sulfate (sulfuric acid band), aluminum chloride, and aluminum nitrate is used as an acidic substance, the aluminum content in the core paper tube base paper becomes 300 to 1000 ppm. It is preferable to add such that. In addition, in the production of base paper, the amount of aluminum compound added internally and externally varies depending on the type of pulp and the type of chemicals added as needed other than the aluminum compound. It is preferable to adjust.
The aluminum compound may be any compound that ionizes to aluminum ions in water, and examples include aluminum sulfate (sulfate band), aluminum chloride, aluminum nitrate, etc., but use aluminum sulfate that is widely used in the papermaking field. Is preferable from the viewpoint of handling.
本発明において、紙面ｐＨを３．５以下に調整した原紙に、さらにリンゴ酸及び又はクエン酸を固形分が０．０５〜０．５ｇ／ｍ2となる範囲で塗布することにより消臭効果を向上させることができる。リンゴ酸及び又はクエン酸の塗布量が０．０５ｇ／ｍ2未満であると消臭効果の向上が見られない。一方、リンゴ酸及び又はクエン酸の塗布量が０．５ｇ／ｍ2を超えてもそれ以上十分な効果が得られない。なお、リンゴ酸及び又はクエン酸を塗布した後の原紙のｐＨが３．５以下であることが重要であり、紙面ｐＨは２．４〜３．０にすることが好ましい。 In the present invention, a deodorizing effect can be obtained by applying malic acid and / or citric acid in a range of 0.05 to 0.5 g / m 2 to the base paper whose paper surface pH is adjusted to 3.5 or less. Can be improved. If the coating amount of malic acid and / or citric acid is less than 0.05 g / m 2 , the deodorizing effect is not improved. On the other hand, even if the application amount of malic acid and / or citric acid exceeds 0.5 g / m 2 , a sufficient effect cannot be obtained. In addition, it is important that the pH of the base paper after applying malic acid and / or citric acid is 3.5 or less, and the paper surface pH is preferably 2.4 to 3.0.
次に本発明を実施例および比較例により更に詳細に説明するが、本発明はこれらに限定されるものではない。 EXAMPLES Next, although an Example and a comparative example demonstrate this invention further in detail, this invention is not limited to these.
［実施例１］
濾水度（ＣＳＦ）が４００ｍｌとなるように叩解した広葉樹晒クラフトパルプ（Ｌ−ＢＫＰ）にロジン系サイズ剤 ０．５％、ＰＡＭ系内添紙力剤０．２％及び抄造後の紙面ｐＨが３．０となるように硫酸バンドをそれぞれ添加し、長網抄紙機により目標坪量１６０ｇ／ｍ２の原紙を抄造した。紙中のアルミニウム含有量は、８８３ｐｐｍであった。アンモニアに対する高い消臭効果が得られ、品質も実用上問題がなかった。
[Example 1]
Hardwood bleached kraft pulp (L-BKP) beaten to a freeness (CSF) of 400 ml, rosin sizing agent 0.5%, PAM internal paper strength agent 0.2%, and paper surface pH after papermaking A sulfuric acid band was added so as to be 3.0, and a base paper having a target basis weight of 160 g / m 2 was made using a long paper machine. The aluminum content in the paper was 883 ppm. A high deodorizing effect on ammonia was obtained, and the quality was not problematic in practice.
［実施例２］
抄造後の紙面ｐＨが３．４となるように硫酸バンドの添加率を調整した以外は実施例１と同様に原紙を抄造した。紙中のアルミニウム含有量は、３８２ｐｐｍであった。アンモニアに対する高い消臭効果が得られ、品質も実用上問題がなかった。
[Example 2]
A base paper was made in the same manner as in Example 1 except that the addition rate of the sulfuric acid band was adjusted so that the paper surface pH after paper making was 3.4. The aluminum content in the paper was 382 ppm. A high deodorizing effect on ammonia was obtained, and the quality was not problematic in practice.
［実施例３］
実施例１で得た原紙に、リンゴ酸の原紙両面における塗布量が０．２ｇ／ｍ２（固形分）となるように濃度を調整したリンゴ酸水溶液を浸漬塗布した。紙面ｐＨは２．４、紙中アルミニウム含有量は、４１０ｐｐｍであった。アルミニウム含有量の減少は、浸漬塗布時にリンゴ酸水溶液中にアルミニウムが溶出したためである。アンモニアに対する高い消臭効果が得られ、品質も実用上問題がなかった。
[Example 3]
The malic acid aqueous solution whose concentration was adjusted so that the coating amount on both sides of the malic acid base paper was 0.2 g / m 2 (solid content) was applied by dip coating to the base paper obtained in Example 1. The paper surface pH was 2.4, and the aluminum content in the paper was 410 ppm. The decrease in the aluminum content is due to the dissolution of aluminum in the malic acid aqueous solution during dip coating. A high deodorizing effect on ammonia was obtained, and the quality was not problematic in practice.
［比較例１］
抄造後の紙面ｐＨが３．８となるように硫酸バンドの添加率を調整した以外は、実施例１と同様に原紙を抄造した。紙中のアルミニウム含有量は、２６７ｐｐｍであった。品質は実用上問題なかったが、十分な消臭効果が得られなかった。
[Comparative Example 1]
A base paper was made in the same manner as in Example 1 except that the addition rate of the sulfuric acid band was adjusted so that the paper surface pH after paper making was 3.8. The aluminum content in the paper was 267 ppm. Although there was no problem in terms of quality, a sufficient deodorizing effect could not be obtained.
＜消臭効果試験（アンモニア）＞
上記実施例、比較例で抄造した原紙から採取した試験片３ｃｍ×３ｃｍ １枚を入れたガスバック（ＰＶＤＦバック２Ｌ Ａ−６ＳＮ 近江オドエアサービス社製）に空気１．５Ｌを注入後、試験片を入れていないガスバック内に注入したときの２分後のアンモニア濃度が９０〜１００ｐｐｍとなるように濃度を調整したアンモニアガスを一定量注入し、２分後、１０分後、３０分後、１時間後、２時間後のガスバック中のアンモニア濃度を検知管３Ｌａ（ガステック社製）を用いて測定した。試験は温度２３℃の恒温室内で実施した。
<Deodorizing effect test (ammonia)>
After injecting 1.5 L of air into a gas bag (PVDF bag 2L A-6SN manufactured by Omi Air Service Co., Ltd.) containing one test piece 3 cm × 3 cm collected from the base paper made in the above examples and comparative examples, the test piece A fixed amount of ammonia gas whose concentration was adjusted so that the ammonia concentration after 2 minutes would be 90 to 100 ppm when injected into a gas bag not containing gas, 2 minutes, 10 minutes, 30 minutes later, After 1 hour, the ammonia concentration in the gas bag after 2 hours was measured using a detector tube 3La (manufactured by Gastec). The test was conducted in a constant temperature room at 23 ° C.
＜アルミニウム含有量＞
精秤した試験片約０．２ｇを５２５℃で灰化し、希釈後の硝酸濃度が３０ｍＭとなるように濃硝酸で灰を溶解した後蒸留水で希釈し、３０ｍＭ硝酸を加えて１０．０ｍｌとし、更に３０ｍＭ硝酸を加えて１００倍に希釈し、ＩＣＰ−ＭＳ（誘導結合プラズマ質量分析装置）により測定した。
＜紙面ｐＨ＞
ＪＡＰＡＮ ＴＡＰＰＩ 紙パルプ試験方法 Ｎｏ．４９−２：２０００ に規定される「紙−表面ｐＨ測定方法−第２部：指示薬法」に従って測定した。
測定結果を、表１に示す。
<Aluminum content>
About 0.2 g of the precisely weighed test piece is incinerated at 525 ° C., dissolved in concentrated nitric acid so that the nitric acid concentration after dilution is 30 mM, diluted with distilled water, and 30 mM nitric acid is added to make 10.0 ml. Furthermore, 30 mM nitric acid was added to dilute the sample 100 times, and the measurement was performed by ICP-MS (inductively coupled plasma mass spectrometer).
<Paper pH>
JAPAN TAPPI Paper Pulp Test Method No. 49-2: 2000. “Paper—surface pH measurement method—Part 2: Indicator method”.
The measurement results are shown in Table 1.
紙面ｐＨが３．５以下である実施例１〜３は、紙面ｐＨが３．８である比較例１と比較して、アンモニアを中和する能力にすぐれており、良好な消臭効果を発揮した。特に、クエン酸を塗布した実施例３はアンモニア中和能が秀でていた。 Examples 1 to 3 having a paper surface pH of 3.5 or less are superior to Comparative Example 1 in which the paper surface pH is 3.8, and are excellent in the ability to neutralize ammonia and exhibit a good deodorizing effect. did. In particular, Example 3 coated with citric acid was excellent in ammonia neutralizing ability.
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