JP2001055688A - Paper strengthening agent - Google Patents
Paper strengthening agentInfo
- Publication number
- JP2001055688A JP2001055688A JP22743099A JP22743099A JP2001055688A JP 2001055688 A JP2001055688 A JP 2001055688A JP 22743099 A JP22743099 A JP 22743099A JP 22743099 A JP22743099 A JP 22743099A JP 2001055688 A JP2001055688 A JP 2001055688A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- strength
- fiber
- density
- papermaking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Polyethers (AREA)
- Paper (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、紙の強度を向上さ
せるだけでなく、その密度を下げることができる紙力増
強剤に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper-strengthening agent which can not only improve the strength of paper but also reduce its density.
【０００２】[0002]
【従来の技術】従来から、紙の強度を向上させるため
に、ポリアミド系の紙力増強剤が広く用いられている。
このポリアミド系の紙力増強剤は、アルミ電解コンデン
サの電解紙の強度を高めるためにも用いられている。と
ころで、アルミ電解コンデンサでは、電解紙中に電解液
を含浸させているため、コンデンサとしてのインピーダ
ンス特性、特に等価直列抵抗（以下、ＥＳＲと称する）
が高くなり易いことが問題であり、インピーダンス特性
を良くするためには、電解紙を薄くするか密度を低くす
る必要がある。2. Description of the Related Art Conventionally, polyamide-based paper-strengthening agents have been widely used to improve the strength of paper.
This polyamide-based paper strength enhancer is also used to increase the strength of the electrolytic paper of an aluminum electrolytic capacitor. By the way, in an aluminum electrolytic capacitor, since an electrolytic solution is impregnated in electrolytic paper, impedance characteristics as a capacitor, particularly an equivalent series resistance (hereinafter, referred to as ESR) are obtained.
However, in order to improve the impedance characteristics, it is necessary to make the electrolytic paper thinner or lower the density.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、電解紙
を薄くしたり密度を低くすると、引っ張り強度が低下し
てショート不良率が増大するという問題が生じ、反対
に、電解紙を厚くすると一次的にＥＳＲが悪化し、密度
を高めると二次的にＥＳＲが悪化することが判明してい
る。However, when the thickness of the electrolytic paper is reduced or the density thereof is reduced, a problem arises in that the tensile strength decreases and the short-circuit failure rate increases. It has been found that the ESR deteriorates, and the ESR worsens secondary as the density increases.
【０００４】例えば、マニラ紙を主体とする電解紙にポ
リアミド系の紙力増強剤であるポリアクリルアミドを含
浸した場合、抄紙強度を約２倍程度に向上させることは
可能であるものの、電解紙密度を“０．２７ｇ／ｃ
ｍ3 ”以下に低下させると、抄紙及びコンデンサ素子の
巻回工程における電解紙自体の強度が低くなるため、電
解紙の下限密度は“０．２７ｇ／ｃｍ3 ”であるとされ
ていた。そのため、紙の強度を向上させつつ、その密度
を下げることができる紙力増強剤の開発が切望されてい
た。For example, when electrolytic paper mainly composed of manila paper is impregnated with polyacrylamide, which is a polyamide-based paper strength enhancer, it is possible to improve the papermaking strength by about twice, To “0.27 g / c
If the density is reduced to not more than m 3 ″, the strength of the electrolytic paper itself in the papermaking and winding process of the capacitor element is reduced, and the lower limit density of the electrolytic paper is said to be “0.27 g / cm 3 ”. There has been a strong need for the development of a paper strength agent that can reduce the density of paper while improving the strength of the paper.
【０００５】本発明は、上述したような従来技術の問題
点を解決するために提案されたものであり、その目的
は、紙の強度を向上させつつ、その密度を下げることが
できる紙力増強剤を提供することにある。The present invention has been proposed to solve the above-mentioned problems of the prior art, and an object of the present invention is to enhance the strength of paper while increasing the paper strength capable of lowering the density of the paper. To provide an agent.
【０００６】[0006]
【課題を解決するための手段】本発明者等は、上記課題
を解決すべく、紙の強度を向上させつつ、その密度を下
げることができる紙力増強剤について鋭意検討を重ねた
結果、本発明を完成するに至ったものである。すなわ
ち、本発明者等は、種々の紙繊維あるいは紙繊維と他の
繊維との混抄紙に種々の紙力増強剤を含浸して、紙強度
及び密度を調べた結果、紙力増強剤として、二塩基酸の
ポリオキシアルキレングリコール付加物の水溶液を用い
ることが望ましいことが判明したものである。Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors have made intensive studies on a paper strength enhancer capable of reducing the density while improving the strength of the paper. The invention has been completed. That is, the present inventors impregnated various paper strength or mixed paper of paper fibers and other fibers with various paper strength agents, and examined the paper strength and density. It has been found that it is desirable to use an aqueous solution of a polyoxyalkylene glycol adduct of a dibasic acid.
【０００７】（紙力増強剤）本発明に係る紙力増強剤
は、二塩基酸のポリオキシアルキレングリコール付加物
の水溶液である。二塩基酸としては、フタル酸、マレイ
ン酸あるいはアジピン酸が望ましく、また、アルキル基
としては、エチル基あるいはプロピル基が望ましい。具
体例としては、ポリオキシエチレンフタレート、ポリオ
キシエチレンマレート、ポリオキシエチレンアジペー
ト、ポリオキシプロピレンフタレート、ポリオキシプロ
ピレンマレート、ポリオキシプロピレンアジペートが挙
げられる。(Paper Strength Enhancer) The paper strength enhancer according to the present invention is an aqueous solution of a polyoxyalkylene glycol adduct of a dibasic acid. The dibasic acid is preferably phthalic acid, maleic acid or adipic acid, and the alkyl group is preferably an ethyl group or a propyl group. Specific examples include polyoxyethylene phthalate, polyoxyethylene malate, polyoxyethylene adipate, polyoxypropylene phthalate, polyoxypropylene malate, and polyoxypropylene adipate.
【０００８】続いて、上記の紙力増強剤の含浸条件につ
いて説明する。すなわち、上記の紙力増強剤１〜２５％
水溶液（最適値は５〜１０％）を調製し、３０〜５０℃
で、この水溶液中に後述する所定の抄紙を１〜５秒間浸
漬する。なお、紙力増強剤の水溶液の濃度を１〜２５％
としたのは、１％以下であると充分な紙強度が得られ
ず、２５％以上であると抵抗値が大きくなり、また、水
溶液の粘度が高くなるため、含浸過程においても不具合
が生じてしまうからである。Next, the impregnation conditions of the above-mentioned paper strength enhancer will be described. That is, the above paper strength enhancer 1 to 25%
Prepare an aqueous solution (optimum value is 5-10%),
Then, predetermined paper making described later is immersed in the aqueous solution for 1 to 5 seconds. In addition, the concentration of the aqueous solution of the paper strength enhancer is 1 to 25%.
The reason is that if it is 1% or less, sufficient paper strength cannot be obtained, and if it is 25% or more, the resistance value becomes large, and the viscosity of the aqueous solution becomes high, so that a problem occurs in the impregnation process. It is because.
【０００９】このように、紙力増強剤として二塩基酸の
ポリオキシアルキレングリコール付加物の水溶液を用い
ることによって良好な効果が得られたのは、水溶性ポリ
マーである二塩基酸のポリオキシアルキレングリコール
付加物が紙繊維間に作用して、その強度を向上させるこ
とができるためであると考えられる。また、その結果、
従来の紙に比べて紙繊維密度を低下させた場合であって
も、同程度の抄紙強度を得ることができると考えられ
る。As described above, a good effect was obtained by using an aqueous solution of a polyoxyalkylene glycol adduct of a dibasic acid as a paper-strength enhancer, because a water-soluble polymer, a polyoxyalkylene glycol of a dibasic acid, was obtained. This is considered to be because the glycol adduct acts between the paper fibers to improve the strength. Also, as a result,
It is considered that the same papermaking strength can be obtained even when the paper fiber density is reduced as compared with conventional paper.
【００１０】（抄紙）本発明者等は、上記紙力増強剤を
含浸させる抄紙についても鋭意検討を重ねた結果、従来
の紙に比べて紙繊維密度を低下させた紙繊維のみの抄
紙、あるいは紙繊維とＰＶＡ繊維の混抄紙に上記紙力増
強剤を含浸することにより、紙の強度を向上させつつ、
その密度を下げることができることが判明した。(Papermaking) The present inventors have conducted intensive studies on papermaking impregnated with the above-mentioned paper strength enhancer. As a result, the papermaking of only paper fibers having a lower paper fiber density than conventional papers, or By impregnating the paper strength enhancer into a mixed paper of paper fiber and PVA fiber, while improving the strength of the paper,
It has been found that its density can be reduced.
【００１１】（ａ．紙繊維のみの抄紙）紙繊維のみの抄
紙としては、マニラ麻パルプ、クラフトパルプ、サイザ
ル麻パルプ、エスパルトパルプから選択された１種又は
複数種を、１つの円網（長網）バット部を有した円網
（長網）抄紙機、あるいは２つ以上複数の円網（長網）
バット部を有した円網（長網）多層コンビネーションマ
シン等の抄紙機を用いて抄紙したものを用いることが望
ましい。(A. Papermaking only with paper fiber) As a papermaking only with paper fiber, one or more kinds selected from Manila hemp pulp, kraft pulp, sisal pulp, and esparto pulp are combined into one circular net (long length). Net) Round net (long net) paper machine with butt section, or two or more round nets (long net)
It is desirable to use a paper made by using a paper machine such as a circular net (long net) multilayer combination machine having a butt portion.
【００１２】（ｂ．混抄紙Ａ…紙繊維とポリビニルアル
コール繊維の混抄紙）上記紙繊維と混抄するポリビニル
アルコール（以下、ＰＶＡと記す）繊維は、３０〜４０
％のＰＶＡ水溶液を熱空中で紡糸して作成される。ま
た、紙繊維とＰＶＡ繊維の混合比は、９５：５〜６０：
４０が望ましく、最適値は９０：１０〜７０：３０であ
る。そして、紙繊維とＰＶＡ繊維を混ぜ合わせて、上記
円網（長網）抄紙機、あるいは円網（長網）多層コンビ
ネーションマシン等の抄紙機を用いて抄紙することによ
り、混抄紙Ａを得ることができる。このように紙繊維と
ＰＶＡ繊維の混抄紙を用いた場合に良好な結果が得られ
た理由は、ＰＶＡ繊維を用いることで紙繊維密度をさら
に下げることが可能となると共に、含浸した紙力増強剤
が紙繊維間に作用するためと考えられる。(B. Mixed Paper A: Mixed Paper of Paper Fiber and Polyvinyl Alcohol Fiber) The polyvinyl alcohol (hereinafter referred to as PVA) fiber mixed with the above paper fiber is 30 to 40.
% PVA aqueous solution is spun in hot air. The mixing ratio of the paper fiber and the PVA fiber is 95: 5 to 60:
40 is desirable, and the optimal value is 90:10 to 70:30. Then, a mixed paper A is obtained by mixing the paper fiber and the PVA fiber and making a paper using the above-described circular net (long net) multi-layer combination machine or the like. Can be. The reason why a good result was obtained when the mixed paper of the paper fiber and the PVA fiber was used is that the use of the PVA fiber makes it possible to further reduce the paper fiber density and to increase the impregnated paper strength. It is considered that the agent acts between the paper fibers.
【００１３】（ｃ．混抄紙Ｂ…二塩基酸のポリオキシア
ルキレングリコール付加物からなる繊維と紙繊維の混抄
紙）本発明者等は、本発明に係る紙力増強剤自体を紙繊
維と混抄することにより、紙の強度を向上させつつ、そ
の密度を下げることができるか否かについて鋭意検討を
重ねた結果、二塩基酸のポリオキシアルキレングリコー
ル付加物からなる繊維（以下、ポリマー繊維と称する）
と紙繊維とを混抄した紙においては、別途、紙力増強剤
を含浸しなくても良好な結果が得られることが判明し
た。(C. Mixed paper B: mixed paper of fiber and paper fiber comprising polyoxyalkylene glycol adduct of dibasic acid) The present inventors mixed the paper strength enhancer of the present invention with paper fiber. As a result of intensive studies on whether or not the density of the paper can be reduced while improving the strength of the paper, a fiber comprising a polyoxyalkylene glycol adduct of a dibasic acid (hereinafter referred to as a polymer fiber) )
It has been found that good results can be obtained in paper mixed with paper fibers and without separately impregnating with a paper strength enhancer.
【００１４】すなわち、紙繊維とポリマー繊維を混ぜ合
わせて、上記円網（長網）抄紙機、あるいは円網（長
網）多層コンビネーションマシン等の抄紙機を用いて抄
紙することにより、混抄紙Ｂを得ることができる。な
お、紙繊維とポリマー繊維の混合比は、９５：５〜６
０：４０が望ましく、最適値は８０：２０〜７０：３０
である。また、混抄紙Ｂにおいては、紙繊維と混ぜ合わ
せたポリマー繊維によって、紙繊維間での強度が保持さ
れるため、抄紙後に上記紙力増強剤を含浸する必要はな
い。That is, the paper fiber and the polymer fiber are mixed, and the paper is made using a paper machine such as the above-mentioned circular net (long net) multi-layer combination machine or the like. Can be obtained. The mixing ratio of paper fiber and polymer fiber is 95: 5-6
0:40 is desirable, and the optimal value is 80:20 to 70:30.
It is. Further, in the mixed papermaking B, since the strength between the paper fibers is maintained by the polymer fibers mixed with the paper fibers, it is not necessary to impregnate the paper strength enhancer after the papermaking.
【００１５】このように紙繊維とポリマー繊維の混抄紙
を用いた場合に良好な結果が得られた理由は、ポリマー
繊維を用いることで紙繊維密度をさらに下げることが可
能となると共に、混ぜ合わせたポリマー繊維によって、
紙力増強剤を含浸したと同様の作用効果が得られるため
と考えられる。また、紙繊維間での強度が保持されるた
め、抄紙後の紙力増強剤の含浸工程が不要となるため、
効率がさらに向上する。The reason why good results were obtained when a mixed paper of paper fiber and polymer fiber was used as described above is that the use of polymer fiber makes it possible to further reduce the paper fiber density, Polymer fibers
This is presumably because the same action and effect as obtained by impregnation with the paper strength enhancer were obtained. Also, since the strength between the paper fibers is maintained, the step of impregnating the paper strength enhancer after papermaking becomes unnecessary,
Efficiency is further improved.
【００１６】[0016]
【実施例】以下、実施例に基づいて本発明をさらに詳細
に説明する。Hereinafter, the present invention will be described in more detail with reference to examples.
【００１７】［１．紙の調製］ （従来例）マニラ麻パルプ１００重量％を使用して抄造
した、密度“０．２７ｇ／ｃｍ3”、抄紙強度“０．６
ｋｇ／１５ｍｍ”の抄紙に、ポリアクリルアミドを含浸
したもの （実施例１）マニラ麻パルプ１００重量％を使用して抄
造した、密度“０．２２ｇ／ｃｍ3”、抄紙強度“０．
４ｋｇ／１５ｍｍ”の抄紙に、ポリオキシエチレンフタ
レートの５％水溶液を３０℃、１秒間含浸したもの （実施例２）マニラ麻パルプ８０重量％とＰＶＡ繊維２
０重量％を混合して抄造した、密度“０．２３ｇ／ｃｍ
3 ”、抄紙強度“０．６ｋｇ／１５ｍｍ”の混抄紙に、
ポリオキシエチレンフタレートの５％水溶液を３０℃、
１秒間含浸したもの （実施例３）ポリオキシエチレンフタレート繊維２０重
量％とマニラ麻パルプ８０重量％の混抄紙 ［２．比較結果］上記の方法により得られた従来例及び
各実施例の紙について、密度及び紙力増強剤を含浸する
前の抄紙強度、紙力増強剤を含浸した後の抄紙強度を測
定したところ、表１に示すような結果が得られた。[1. Preparation of Paper] (Conventional Example) A paper made using 100% by weight of Manila hemp pulp, density "0.27 g / cm 3 ", papermaking strength "0.6
Example 1 A paper made by impregnating polyacrylamide into a paper weighing 15 kg / 15 mm (Example 1) Manufactured using 100% by weight of Manila hemp pulp, having a density of 0.22 g / cm 3 and a papermaking strength of 0.
4 kg / 15 mm paper made by impregnating a 5% aqueous solution of polyoxyethylene phthalate at 30 ° C. for 1 second (Example 2) 80% by weight of Manila hemp pulp and PVA fiber 2
0% by weight was mixed, and the paper density was "0.23 g / cm."
3 ", mixed paper of paper strength" 0.6kg / 15mm "
5% aqueous solution of polyoxyethylene phthalate at 30 ° C.
(Example 3) Mixed paper of 20% by weight of polyoxyethylene phthalate fiber and 80% by weight of manila hemp pulp [2. Comparative results] For the papers of the conventional example and each example obtained by the above method, the density and the papermaking strength before impregnation with the paper strength enhancer and the papermaking strength after impregnation with the paper strength enhancer were measured. The results as shown in Table 1 were obtained.
【００１８】なお、密度は以下のようにして測定した。
まず、紙を１０枚以上重ねた上に、１００ｍｍ×１３０
ｍｍの所定のアルミ板を当て、このアルミ板に沿ってカ
ッターナイフで正確に切り取る（面積：１３０００ｍｍ
2 ）。また、１０枚重ねた試料の１５ｍｍ以上内側のと
ころを間隔をあけて３ヶ所の厚さを測定し、その平均値
を厚さとする。さらに、１０枚の試料を１０５℃で３時
間乾燥後、直ちにデシケータに移して放冷し、その後１
０枚をデシケータから取り出して、１分以内にその重量
を測定し、これらの値から密度を求めた。また、抄紙強
度は、大きさが１５ｍｍ×２５０ｍｍの試料を３枚以上
用い、ショッパー型引っ張り試験機にて３回測定し、そ
の平均値を求めた。The density was measured as follows.
First, after stacking 10 or more sheets of paper, 100 mm x 130 mm
mm, and cut accurately along this aluminum plate with a cutter knife (area: 13000 mm
2 ). Further, the thickness of three samples is measured at intervals of 15 mm or more inside the ten stacked samples, and the average value is defined as the thickness. Further, after drying 10 samples at 105 ° C. for 3 hours, the samples were immediately transferred to a desiccator and allowed to cool.
No sheet was taken out of the desiccator, its weight was measured within one minute, and the density was determined from these values. The papermaking strength was measured three times with a Shopper type tensile tester using three or more samples having a size of 15 mm × 250 mm, and the average value was obtained.
【００１９】[0019]
【表１】 [Table 1]
【００２０】表１から明らかなように、従来例において
は、紙力増強剤を含浸しない場合の抄紙強度は“０．
６”であったが、ポリアミド系の紙力増強剤を含浸した
後の抄紙強度は“１．３”と約２．２倍となった。しか
し、密度は“０．２７”と大きく、低密度化の要請を満
たすものではなかった。As is clear from Table 1, in the conventional example, the papermaking strength without impregnating the paper strength enhancer was "0.
6 ", the papermaking strength after impregnating with a polyamide-based paper strength enhancer was" 1.3 ", about 2.2 times, but the density was as large as" 0.27 "and low. It did not meet the demand for densification.
【００２１】一方、従来例と同様のマニラ麻パルプのみ
の抄紙を用い、その密度を“０．２２”に低下させた実
施例１においては、紙力増強剤を含浸しない場合の抄紙
強度は“０．４”と従来例より小さい値を示したが、こ
れは従来例に比べて紙繊維が少ないためであると考えら
れる。しかし、紙繊維が少ないにもかかわらず、本発明
の紙力増強剤を含浸した後の抄紙強度は“１．４”と含
浸前の約３．５倍となり、従来例とほぼ同程度の強度が
得られた。このように、実施例１においては、密度を
“０．２２”に低減しても、本発明の紙力増強剤を含浸
することによって、従来例とほぼ同程度の強度が得られ
ることが判明した。On the other hand, in Example 1 in which a paper made of only manila hemp pulp was used and the density was reduced to "0.22" as in the conventional example, the papermaking strength without impregnating the paper strength enhancer was "0". .4 ", which is smaller than that of the conventional example, is considered to be due to the fact that the number of paper fibers is smaller than that of the conventional example. However, despite the small amount of paper fibers, the papermaking strength after impregnation with the paper strength enhancer of the present invention was "1.4", which was about 3.5 times that before impregnation, and was almost the same as the conventional example. was gotten. Thus, in Example 1, it was found that even if the density was reduced to "0.22", the same strength as that of the conventional example could be obtained by impregnating the paper strength enhancer of the present invention. did.
【００２２】また、従来例と同様のマニラ麻パルプにＰ
ＶＡ繊維を混ぜた混抄紙を用い、その密度を“０．２
３”に低下させた実施例２においては、従来例に比べて
紙繊維が少ないにもかかわらず、紙力増強剤を含浸しな
い場合の抄紙強度は“０．６”と従来例と同様の値を示
した。その理由は、実施例２においては、紙繊維は少な
いもののＰＶＡ繊維が存在するために従来例と同等の強
度が得られたと考えられる。さらに、本発明の紙力増強
剤を含浸した後の抄紙強度は“１．５”と含浸前の約
２．５倍となり、従来例の約１．２倍の強度が得られ
た。In addition, the same Manila hemp pulp as in the conventional example is added with P
Using a mixed paper mixed with VA fiber, the density is set to "0.2
In Example 2 in which the papermaking strength was reduced to 3 ", the papermaking strength without impregnating the paper-strengthening agent was" 0.6 ", which is the same value as in the conventional example, despite the fact that the paper fiber was smaller than in the conventional example. The reason is considered to be that the strength equivalent to that of the conventional example was obtained due to the presence of the PVA fiber although the amount of the paper fiber was small in Example 2. Further, the paper strength enhancer of the present invention was impregnated. The papermaking strength after the impregnation was "1.5", which was about 2.5 times that before impregnation, and was about 1.2 times that of the conventional example.
【００２３】さらに、従来例と同様のマニラ麻パルプに
ポリオキシエチレンフタレート繊維を混ぜた混抄紙を用
い、その密度を“０．２２”に低下させた実施例３にお
いては、紙力増強剤を含浸しない場合の抄紙強度は
“１．５”となり、従来例や実施例１及び実施例２の紙
力増強剤を含浸した後の抄紙強度と同様の値を示した。
したがって、実施例３に示した紙においては、抄紙後に
本発明の紙力増強剤を含浸する必要がないことが判明し
た。Further, in Example 3 in which a mixed paper made by mixing polyoxyethylene phthalate fiber with manila hemp pulp similar to the conventional example and the density of the mixed paper was reduced to "0.22", a paper strength enhancing agent was impregnated. The papermaking strength in the case where no papermaking was performed was "1.5", which was the same value as the papermaking strength after impregnation with the paper strength enhancer of the conventional example, Example 1, and Example 2.
Therefore, it was found that the paper shown in Example 3 did not need to be impregnated with the paper strength enhancer of the present invention after papermaking.
【００２４】以上説明した通り、実施例１又は実施例２
に示した紙においては、本発明の紙力増強剤を含浸する
ことにより、密度を下げても、充分な紙強度を得ること
ができることが判明した。また、実施例３に示した紙に
おいては、本発明の紙力増強剤をポリマー繊維として混
抄することにより、充分な紙強度が得られると共に、密
度を下げることができることが判明した。As described above, Embodiment 1 or Embodiment 2
It has been found that, in the paper shown in (1), by impregnating the paper strength enhancer of the present invention, sufficient paper strength can be obtained even when the density is lowered. In the paper shown in Example 3, it was found that by mixing the paper strength enhancer of the present invention as a polymer fiber, sufficient paper strength could be obtained and the density could be reduced.
【００２５】[0025]
【発明の効果】以上説明したように、本発明によれば、
紙の強度を低下させることなく、密度を下げることがで
きる紙力増強剤を提供することができる。As described above, according to the present invention,
It is possible to provide a paper strength enhancer capable of reducing the density without reducing the strength of the paper.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） // Ｄ２１Ｈ 21/22 Ｈ０１Ｇ 9/00 ３０１Ｃ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) // D21H 21/22 H01G 9/00 301C
Claims (3)
ール付加物からなる紙力増強剤。1. A paper strength agent comprising a polyoxyalkylene glycol adduct of a dibasic acid.
あるいはアジピン酸である請求項１に記載の紙力増強
剤。2. The paper strength agent according to claim 1, wherein the dibasic acid is phthalic acid, maleic acid or adipic acid.
ロピル基である請求項１又は請求項２に記載の紙力増強
剤。3. The paper strength enhancer according to claim 1, wherein the alkyl group is an ethyl group or a propyl group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22743099A JP2001055688A (en) | 1999-08-11 | 1999-08-11 | Paper strengthening agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22743099A JP2001055688A (en) | 1999-08-11 | 1999-08-11 | Paper strengthening agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001055688A true JP2001055688A (en) | 2001-02-27 |
Family
ID=16860742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22743099A Pending JP2001055688A (en) | 1999-08-11 | 1999-08-11 | Paper strengthening agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001055688A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009139120A1 (en) * | 2008-05-13 | 2009-11-19 | 日東電工株式会社 | Two-sided adhesive tape and wiring circuit board |
-
1999
- 1999-08-11 JP JP22743099A patent/JP2001055688A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009139120A1 (en) * | 2008-05-13 | 2009-11-19 | 日東電工株式会社 | Two-sided adhesive tape and wiring circuit board |
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