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JP4484194B2
JP4484194B2 JP2003175804A JP2003175804A JP4484194B2 JP 4484194 B2 JP4484194 B2 JP 4484194B2 JP 2003175804 A JP2003175804 A JP 2003175804A JP 2003175804 A JP2003175804 A JP 2003175804A JP 4484194 B2 JP4484194 B2 JP 4484194B2
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Japan
Prior art keywords
paper
ester compound
polyhydric alcohol
fatty acid
adduct
Prior art date
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JP2003175804A
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Japanese (ja)
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JP2005009039A (en
Inventor
朝海 田中
厚 新井
潔 平
克久 神尾
修 横溝
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Miyoshi Oil and Fat Co Ltd
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Miyoshi Oil and Fat Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は柔軟性、吸水性を付与することのできる紙類処理剤で処理した紙類に関する。
【0002】
【従来の技術】
紙や紙製品、特にトイレットペーパーやティッシュペーパー等の家庭用の紙類には適度な柔軟性、吸水性が要求されている。このような要求に応えるため、処理剤によって紙類を処理することが行われており、従来より、グリセリン、脂肪酸エステル類、油脂類、パラフィン類等を用いて処理する方法が知られている。また第四級アンモニウム塩で処理する方法(特許文献1)、第四級アンモニウム塩とグリセリン、脂肪族アルコールを含む処理剤で処理する方法(特許文献2)、ポリシロキサンで処理する方法(特許文献3)等が知られている。
【0003】
【特許文献1】
特開昭63−165597号公報
【特許文献2】
特開平4−100995号公報
【特許文献3】
特開平3−900号公報
【0004】
【発明が解決しようとする課題】
しかしながら、グリセリンを用いて処理する方法では、紙類に十分な柔軟性を付与するために多量のグリセリンを使用する必要があり、処理コストが高くつくという問題があった。また脂肪酸エステル類、油脂類、パラフィン類を用いて処理する方法では、処理剤が油性成分で構成されるために紙類に要求される吸水性を阻害し、手にべたつき感が残り使用者に不快感を与え易いという問題があった。一方、特許文献1、2に記載されている方法は、皮膚刺激性のある第四級アンモニウム塩を用いるため安全性が十分とは言い難かった。また特許文献3に記載されている方法は、柔軟性と吸水性とを同時に付与することは困難であるとともに、柔軟性付与効果の高いアミノ変性型のポリシロキサンを用いた場合には、紙類の白度が低下するという問題があった。
【0005】
本発明は上記従来の問題に鑑みなされたもので、従来の紙類処理剤の欠点を解決し、紙類に柔軟性、吸水性を効果的に付与できる紙類処理剤で処理した紙類を提供することを目的とする。
【0006】
【課題を解決するための手段】
即ち本発明の紙類は、ペーパータオル、ティッシュペーパー、トイレットペーパー、フェイシャルティッシュ、ちり紙、ペーパーナプキン、京花紙より選ばれた紙類に、三価以上の多価アルコールのポリオキシアルキレン付加体の脂肪酸エステル化合物を必須成分とする紙類処理剤を、噴霧器によりスプレーする方法あるいは含浸機により浸漬処理する方法により、多価アルコールのポリオキシアルキレン付加体の脂肪酸エステル化合物が0.01〜10.0重量%含有されるように処理されていることを特徴とする。
【0007】
【発明の実施の形態】
本発明において、紙類処理剤における主成分である三価以上の多価アルコールのアルキレンオキシド付加体の脂肪酸エステル化合物は、多価アルコールのアルキレンオキシド付加体と脂肪酸とのエステル化反応等によって得ることができる。三価以上の多価アルコールとしては、グリセリン、ジグリセリン、トリグリセリン、テトラグリセリン、ペンタエリスリトール、グルコース、ショ糖、ソルビトール、キシリトール、マンニット等が挙げられる。これらのうち、グリセリン、ソルビトールが好ましい。多価アルコールは一種のみを用いる場合に限らず、二種以上の混合物として用いることもできる。
【0008】
多価アルコールのアルキレンオキシド付加体は、上記多価アルコールにアルカリの存在下で、エチレンオキシド、プロピレンオキシド、ブチレンオキシド等のアルキレンオキシドを付加させる等により得ることができる。多価アルコールのアルキレンオキシド付加体は、多価アルコールの全ての水酸基にアルキレンオキシドが付加した構造のものであっても、多価アルコールの水酸基の一部にアルキレンオキシドが付加した構造のものであっても良い。またアルキレンオキシドは1種のみが付加したものでも2種以上が付加したものでも良く、2種以上のアルキレンオキシドが付加した付加体は、ランダム付加体でもブロック付加体でも良い。多価アルコールに付加するアルキレンオキシドとしては、エチレンオキシドが好ましい。多価アルコールに対するアルキレンオキシドの付加重合度は、多価アルコール1モル当たり、1〜100モルが好ましい。
【0009】
脂肪酸としては、炭素数12〜22の飽和又は不飽和脂肪酸が好適に用いられ、直鎖状脂肪酸でも分岐鎖脂肪酸のいずれであっても良い。脂肪酸は一種又は二種以上を混合して用いることができる。炭素数12〜22の脂肪酸のなかでも、ステアリン酸、イソステアリン酸が好ましい。多価アルコールのアルキレンオキシド付加体と脂肪酸とのエステル化触媒としては、p−トルエンスルホン酸ナトリウム、水酸化ナトリウム、水酸化カリウム、ナトリウムアルコラート等が用いられる。
【0010】
本発明において用いる三価以上の多価アルコールのアルキレンオキシド付加体の脂肪酸エステル化合物は、多価アルコールのアルキレンオキシド付加体の水酸基の一部が脂肪酸とエステル化した構造のものでも、全ての水酸基がエステル化した構造のものでも良いが、分子内に含まれる水酸基の50%以上がエステル化した構造のものが良好な柔軟性を付与する点で好ましい。
【0011】
本発明において、紙類処理剤は上記エステル化合物を主成分として含有するが、エステル化合物の含有量が50重量%以上であることが好ましい。また上記エステル化合物の他に、更に必要に応じて他の成分、例えば鉱物油、脂肪酸エステル等の平滑剤、ポリ(オキシエチレン)アルキルエーテル、ポリ(オキシエチレン)脂肪酸エステル等の乳化剤等を配合することもできる。
【0012】
本発明において、紙類処理剤は、上記エステル化合物を水に溶解または分散した水溶液或いは乳化液として使用する。本発明において、紙類処理剤により紙類の処理を行う場合、通常、上記エステル化合物を1.0〜50.0重量%程度含む水溶液、乳化液として使用する。この水溶液、乳化液中には保湿成分(グリセリン、ソルビトールやポリエチレングリコール等の多価アルコール及び糖類)等の他の成分を更に配合することができる。本発明において、紙類処理剤により紙類を処理するには、紙類に噴霧器によりスプレーする方法、含浸機により浸漬処理する方法等が挙げられる。本発明の紙類は、上記処理剤によって処理されたものであって、処理後の紙類中に上記エステル化合物が固形換算量として0.01〜10.0重量%含有されているものである。より好ましくは、処理後の紙類中に上記エステル化合物が固形分換算量として0.1〜5.0重量%含有されていることである。上記エステル化合物の含有率が0.01重量%未満では、紙類に十分な柔軟性が付与されない。また、10.0重量%を超えるとベタ付き感などにより、かえって紙類の風合い等が悪くなる。
【0013】
本発明において、上記処理剤により処理される紙類とは、ペーパータオル、ティッシュペーパー、トイレットペーパー、フェイシャルティッシュ、ちり紙、ペーパーナプキン、京花紙である
【0014】
【実施例】
以下、実施例を挙げて本発明を更に詳細に説明する。実施例の処理剤に使用したエステル化合物は以下の通りである。
【0015】
エステル化合物a:グリセリンエチレンオキシド(20モル)付加体1.0モル当たり、イソステアリン酸3.0モルの割合でエステル化反応させて得たエステル化合物。
【0016】
エステル化合物b:グリセリンエチレンオキシド(24モル)−プロピレンオキシド(24モル)ブロック付加体1.0モル当たり、ステアリン酸2モルの割合でエステル化反応させて得たエステル化合物。
【0017】
エステル化合物c:ソルビトールエチレンオキシド(30モル)付加体1.0モル当たり、イソステアリン酸3モルの割合でエステル化反応させて得たエステル化合物。
【0018】
エステル化合物d:ソルビトールエチレンオキシド(60モル)付加体1.0モルあたり、ステアリン酸4モルの割合でエステル化反応させて得たエステル化合物。
【0019】
実施例1〜10
上記エステル化合物を用い、エステル化合物の含有率が20.0重量%(保湿剤としてグリセリンを併用した実施例9及び10では、グリセリンも含めた含有率が20.0重量%)となるように、処理剤を水に溶解又は分散させて処理液を調整した。各処理液を柔軟処理を施していないティッシュペーパーに、付着量が表1に示す量(エステル化合物の無水物換算量)となるようにスプレー噴霧処理した後、24時間風乾させ、その後、更に恒温恒湿室(温度20℃、湿度65%RH)内で12時間以上放置し、含有水分率が平衡になった後、ティッシュペーパーの柔軟性、吸水性を評価した。結果を未処理のティッシュペーパーの場合とあわせて表1に示す。
【0020】
処理後のティッシュペーパーの柔軟性、吸水性は以下のようにして評価した。
柔軟性
被試験紙を5枚片手で握り、柔軟性の官能性評価を行った。評価基準は以下の5段階とした。
5:非常に柔らかい
4:柔らかい
3:やや柔らかい
2:柔軟剤未使用と同等
1:柔らかくない
【0021】
吸水性
処理後のティッシュペーパーにスポイトから水滴(イオン交換水)を滴下し、吸水状態を未処理のティッシュペーパーと比較して以下の基準で評価した。
○:未処理のものに比べて吸水性が同程度乃至は良好となる。
×:未処理のものより吸水性が悪くなり、紙本来の吸水性が阻害される。
【0022】
【表1】

Figure 0004484194
【0023】
比較例1〜10
表2に示す処理剤主成分の含有率が20.0重量%(乳化剤を併用した場合には乳化剤も含めた合計の含有率が20重量%)となるように水に溶解又は分散させて表2に示す処理液を調整した。比較例7〜10については、表2に示す量の乳化剤として併用し、温水加水法により乳化して処理液を調整した。尚、乳化剤として、比較例7はポリオキシエチレン(10モル)ステアリルエーテルを、比較例8はポリオキシエチレン(8モル)セチルエーテルを、比較例9及び10はポリオキシエチレン(30モル)ラウリルエーテルを使用した。
【0024】
【表2】
Figure 0004484194
【0025】
各処理液を、柔軟処理を施していないティッシュペーパーに、処理剤主成分付着量(乳化剤を併用した場合には乳化剤も含めた合計の付着量)が、表2に示す値となるように噴霧処理した後、24時間風乾させ、その後、更に恒温恒湿室(温度20℃、湿度65%RH)内で12時間以上放置して、含有水分率が平衡になった後、ティッシュペーパーの柔軟性、吸水性を実施例と同様に評価した。これらの結果を表2に示す。
【0026】
【発明の効果】
以上説明したように本発明において用いる紙類処理剤は、紙類に優れた柔軟性を付与できる。従来の処理剤のように柔軟性を付与しようとすると紙類の吸水性が低下するという問題がなく、本発明の紙類は柔軟性.吸水性に優れる効果がある。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to paper treated with paper treating agent capable of imparting flexibility, the water absorption.
[0002]
[Prior art]
Appropriate flexibility and water absorption are required for paper and paper products, especially household paper such as toilet paper and tissue paper. In order to meet such demands, papers are treated with a treating agent, and conventionally, a method of treating with glycerin, fatty acid esters, fats and oils, paraffins, and the like is known. Also, a method of treating with a quaternary ammonium salt (Patent Document 1), a method of treating with a treating agent containing a quaternary ammonium salt, glycerin and an aliphatic alcohol (Patent Document 2), a method of treating with a polysiloxane (Patent Document) 3) etc. are known.
[0003]
[Patent Document 1]
JP-A 63-165597 [Patent Document 2]
JP-A-4-100995 [Patent Document 3]
Japanese Patent Laid-Open No. 3-900 [0004]
[Problems to be solved by the invention]
However, in the method of treating with glycerin, it is necessary to use a large amount of glycerin in order to impart sufficient flexibility to papers, and there is a problem that the treatment cost is high. Also, in the method of treatment using fatty acid esters, fats and oils, paraffins, the treatment agent is composed of oily components, which inhibits the water absorption required for papers, and the user feels sticky to the user. There was a problem that it was easy to give discomfort. On the other hand, the methods described in Patent Documents 1 and 2 are not sufficiently safe because they use a skin-irritating quaternary ammonium salt. In addition, the method described in Patent Document 3 is difficult to simultaneously impart flexibility and water absorption, and when an amino-modified polysiloxane having a high flexibility imparting effect is used, There was a problem that the whiteness of the paper decreased.
[0005]
The present invention has been made in view of the conventional problems described above, to solve the drawbacks of conventional paper treatment agent, flexible paper, the paper treated with paper treating agent to the water absorbent can be effectively applied The purpose is to provide.
[0006]
[Means for Solving the Problems]
That is, the paper of the present invention is a fatty acid of a polyoxyalkylene adduct of a polyhydric alcohol having a valence of 3 or more to a paper selected from paper towel, tissue paper, toilet paper, facial tissue, dust paper, paper napkin, and Kyoto flower paper. the ester compound paper shall be the essential component processing agent by a method of dipping treatment by a method for spraying or impregnating device by nebulizer, fatty acid ester compound of a polyoxyalkylene adduct of a polyhydric alcohol is 0.01 to 10.0 It is processed so that it may contain by weight% .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention , the fatty acid ester compound of an alkylene oxide adduct of a trihydric or higher polyhydric alcohol, which is a main component in a paper treating agent, is obtained by an esterification reaction of an alkylene oxide adduct of a polyhydric alcohol and a fatty acid. Can do. Examples of the trihydric or higher polyhydric alcohol include glycerin, diglycerin, triglycerin, tetraglycerin, pentaerythritol, glucose, sucrose, sorbitol, xylitol, and mannitol. Of these, glycerin and sorbitol are preferred. The polyhydric alcohol is not limited to a single type, and may be used as a mixture of two or more types.
[0008]
An alkylene oxide adduct of a polyhydric alcohol can be obtained by adding an alkylene oxide such as ethylene oxide, propylene oxide, butylene oxide to the polyhydric alcohol in the presence of an alkali. The alkylene oxide adduct of a polyhydric alcohol has a structure in which alkylene oxide is added to all hydroxyl groups of the polyhydric alcohol, but has a structure in which alkylene oxide is added to part of the hydroxyl groups of the polyhydric alcohol. May be. Further, the alkylene oxide may be a single adduct or two or more adducts, and the adduct with two or more alkylene oxides added may be a random adduct or a block adduct. As the alkylene oxide added to the polyhydric alcohol, ethylene oxide is preferable. The degree of addition polymerization of alkylene oxide with respect to polyhydric alcohol is preferably 1 to 100 moles per mole of polyhydric alcohol.
[0009]
As the fatty acid, a saturated or unsaturated fatty acid having 12 to 22 carbon atoms is suitably used, and either a linear fatty acid or a branched chain fatty acid may be used. Fatty acids can be used alone or in combination of two or more. Of the fatty acids having 12 to 22 carbon atoms, stearic acid and isostearic acid are preferable. As an esterification catalyst of an alkylene oxide adduct of a polyhydric alcohol and a fatty acid, sodium p-toluenesulfonate, sodium hydroxide, potassium hydroxide, sodium alcoholate, or the like is used.
[0010]
The fatty acid ester compound of an alkylene oxide adduct of a trihydric or higher polyhydric alcohol used in the present invention has a structure in which a part of the hydroxyl group of an alkylene oxide adduct of a polyhydric alcohol is esterified with a fatty acid. An esterified structure may be used, but a structure in which 50% or more of the hydroxyl groups contained in the molecule are esterified is preferable in terms of imparting good flexibility.
[0011]
In the present invention , the paper treating agent contains the ester compound as a main component, but the content of the ester compound is preferably 50% by weight or more. In addition to the above ester compounds, other components such as smoothing agents such as mineral oil and fatty acid esters, and emulsifiers such as poly (oxyethylene) alkyl ethers and poly (oxyethylene) fatty acid esters are blended as necessary. You can also.
[0012]
In the present invention , the paper processing agent is used as an aqueous solution or emulsion in which the ester compound is dissolved or dispersed in water. In the present invention , when paper is treated with a paper treating agent, it is usually used as an aqueous solution or emulsion containing about 1.0 to 50.0% by weight of the ester compound. Other components such as moisturizing components (glycerin, polyhydric alcohols such as sorbitol and polyethylene glycol and saccharides) can be further blended in the aqueous solution and emulsion. In the present invention , to treat paper with a paper treatment agent, a method of spraying paper with a sprayer, a method of dipping with an impregnator, and the like can be mentioned. Papers of the present invention, which has been processed by the above Kisho physical agents, which the ester compound in paper after treatment is contained 0.01 to 10.0 wt% as a solid in terms of weight It is. More preferably, the treated ester paper contains 0.1 to 5.0% by weight of the ester compound as a solid content conversion amount. When the content of the ester compound is less than 0.01% by weight, sufficient flexibility cannot be imparted to the papers. On the other hand, if it exceeds 10.0% by weight, the texture of the paper will be deteriorated due to the sticky feeling.
[0013]
In the present invention, the paper to be processed by the treatment agent, paper towels, tissue paper, toilet paper, facial tissue, toilet paper, paper napkins, a Kyohanashi.
[0014]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples. The ester compounds used in the treatment agents of the examples are as follows.
[0015]
Ester compound a: an ester compound obtained by an esterification reaction at a ratio of 3.0 mol of isostearic acid per 1.0 mol of glycerin ethylene oxide (20 mol) adduct.
[0016]
Ester compound b: an ester compound obtained by an esterification reaction at a ratio of 2 mol of stearic acid per 1.0 mol of glycerin ethylene oxide (24 mol) -propylene oxide (24 mol) block adduct.
[0017]
Ester compound c: an ester compound obtained by an esterification reaction at a ratio of 3 mol of isostearic acid per 1.0 mol of sorbitol ethylene oxide (30 mol) adduct.
[0018]
Ester compound d: An ester compound obtained by an esterification reaction at a ratio of 4 moles of stearic acid per 1.0 mole of adduct of sorbitol ethylene oxide (60 moles).
[0019]
Examples 1-10
Using the ester compound, the content of the ester compound is 20.0% by weight (in Examples 9 and 10 in which glycerin is used in combination as a humectant, the content including glycerin is 20.0% by weight), The treatment liquid was prepared by dissolving or dispersing the treatment agent in water. Each treatment solution is spray-sprayed on tissue paper that has not been subjected to softening treatment so that the adhesion amount is the amount shown in Table 1 (anhydrous equivalent amount of the ester compound), then air-dried for 24 hours, and then further constant temperature The tissue paper was allowed to stand in a constant humidity chamber (temperature 20 ° C., humidity 65% RH) for 12 hours or more, and after the moisture content became equilibrium, the tissue paper was evaluated for flexibility and water absorption. The results are shown in Table 1 together with the case of untreated tissue paper.
[0020]
The softness and water absorption of the treated tissue paper were evaluated as follows.
The flexibility test paper was evaluated by grasping 5 sheets of flexible test paper with one hand. The evaluation criteria were as follows.
5: Very soft 4: Soft 3: Slightly soft 2: Equivalent to softener not used 1: Not soft [0021]
Water drops (ion-exchanged water) were dropped from a dropper onto tissue paper after water absorption treatment, and the water absorption state was evaluated according to the following criteria in comparison with untreated tissue paper.
○: The water absorption is comparable or better than that of untreated.
X: Water absorption is worse than that of untreated paper, and the original water absorption of paper is inhibited.
[0022]
[Table 1]
Figure 0004484194
[0023]
Comparative Examples 1-10
Table 2 is dissolved or dispersed in water so that the content of the main component of the treating agent shown in Table 2 is 20.0% by weight (when the emulsifier is used in combination, the total content including the emulsifier is 20% by weight). The processing liquid shown in 2 was prepared. About Comparative Examples 7-10, it used together as an emulsifier of the quantity shown in Table 2, and it emulsified with the warm water hydration method, and adjusted the process liquid. As an emulsifier, Comparative Example 7 is polyoxyethylene (10 mol) stearyl ether, Comparative Example 8 is polyoxyethylene (8 mol) cetyl ether, and Comparative Examples 9 and 10 are polyoxyethylene (30 mol) lauryl ether. It was used.
[0024]
[Table 2]
Figure 0004484194
[0025]
Each treatment solution is sprayed onto tissue paper that has not been subjected to softening treatment so that the treatment agent main component adhesion amount (the total adhesion amount including the emulsifier when the emulsifier is used in combination) is the value shown in Table 2. After the treatment, it is air-dried for 24 hours, and then left in a constant temperature and humidity chamber (temperature 20 ° C., humidity 65% RH) for 12 hours or more to equilibrate the moisture content. The water absorption was evaluated in the same manner as in the examples. These results are shown in Table 2.
[0026]
【The invention's effect】
As described above, the paper processing agent used in the present invention can impart excellent flexibility to paper. When you try to impart flexibility to the conventional treatment agent without the problem that water-absorbing paper is reduced, paper of the present invention is flexible. There is an effect excellent in water absorption.

Claims (1)

ペーパータオル、ティッシュペーパー、トイレットペーパー、フェイシャルティッシュ、ちり紙、ペーパーナプキン、京花紙より選ばれた紙類に、三価以上の多価アルコールのポリオキシアルキレン付加体の脂肪酸エステル化合物を必須成分とする紙類処理剤を、噴霧器によりスプレーする方法あるいは含浸機により浸漬処理する方法により、多価アルコールのポリオキシアルキレン付加体の脂肪酸エステル化合物が0.01〜10.0重量%含有されるように処理されていることを特徴とする紙類。  Paper made from paper towels, tissue paper, toilet paper, facial tissue, dust paper, paper napkins, and Kyoto flower paper, and a fatty acid ester compound of a polyoxyalkylene adduct of a trihydric or higher polyhydric alcohol as an essential component It is processed so that the fatty acid ester compound of the polyoxyalkylene adduct of polyhydric alcohol is contained in an amount of 0.01 to 10.0% by a method of spraying a similar compounding agent with a sprayer or a dipping process with an impregnator Papers characterized by
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Citations (6)

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WO1998003730A1 (en) * 1996-07-18 1998-01-29 Kao Corporation Bulking agents for paper, high-bulkiness pulp sheets, and process for the production of the sheets
JPH11200283A (en) * 1998-01-13 1999-07-27 Kao Corp Agent for making paper bulky
JPH11350380A (en) * 1998-06-02 1999-12-21 Kao Corp Bulking agent for paper
JP2002138392A (en) * 2000-08-21 2002-05-14 Nippon Paper Industries Co Ltd Mat coated paper
JP2002155494A (en) * 2000-11-13 2002-05-31 Nippon Paper Industries Co Ltd Bulky and soft paper
JP2002348796A (en) * 2001-05-25 2002-12-04 Miyoshi Oil & Fat Co Ltd Treating agent of papers and method for treating papers

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Publication number Priority date Publication date Assignee Title
WO1998003730A1 (en) * 1996-07-18 1998-01-29 Kao Corporation Bulking agents for paper, high-bulkiness pulp sheets, and process for the production of the sheets
JPH11200283A (en) * 1998-01-13 1999-07-27 Kao Corp Agent for making paper bulky
JPH11350380A (en) * 1998-06-02 1999-12-21 Kao Corp Bulking agent for paper
JP2002138392A (en) * 2000-08-21 2002-05-14 Nippon Paper Industries Co Ltd Mat coated paper
JP2002155494A (en) * 2000-11-13 2002-05-31 Nippon Paper Industries Co Ltd Bulky and soft paper
JP2002348796A (en) * 2001-05-25 2002-12-04 Miyoshi Oil & Fat Co Ltd Treating agent of papers and method for treating papers

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