JPH10219591A - New paper-reinforcing agent to be added - Google Patents

New paper-reinforcing agent to be added

Info

Publication number
JPH10219591A
JPH10219591A JP1875497A JP1875497A JPH10219591A JP H10219591 A JPH10219591 A JP H10219591A JP 1875497 A JP1875497 A JP 1875497A JP 1875497 A JP1875497 A JP 1875497A JP H10219591 A JPH10219591 A JP H10219591A
Authority
JP
Japan
Prior art keywords
paper strength
paper
reinforcing agent
added
strength enhancer
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
Application number
JP1875497A
Other languages
Japanese (ja)
Inventor
Osamu Korenaga
修 是永
Masahiro Inoue
政弘 井上
Masao Okamura
政夫 岡村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsui Chemicals Inc
Original Assignee
Mitsui Chemicals Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsui Chemicals Inc filed Critical Mitsui Chemicals Inc
Priority to JP1875497A priority Critical patent/JPH10219591A/en
Publication of JPH10219591A publication Critical patent/JPH10219591A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To obtain the subject reinforcing agent capable of preventing the trouble stoppage of a paper-making system to ensure a stable operation by including a polyphosphate salt excellent in the corrosion-preventing effect on a device. SOLUTION: For example, a PAN-based anionic paper-reinforcing agent as a fry paper-reinforcing agent, or a urea-formaldehyde-based paper reinforcing agent as a wet paper-reinforcing agent is diluted with water to prepare a solution having a solid content concentration of 5%, and 0.005 pt. of sodium hexametaphosphate, anhydrous sodium pyrophosphate or anhydrous sodium tripolyphosphate as a polyphosphate salt is added and perfectly dissolved in 100 pts. of a paper-reinforcing agent aqueous solution under stirring. 0.1 pt. of the solution is again added and perfectly dissolved in 100 pts. of white water to obtain the objective reinforcing agent.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、紙力増強剤に関す
るものである。詳しくは、装置材料腐食防止効果に優れ
たポリリン酸塩類を含有することを特徴とする新規な内
添紙力増強剤に関するものである。
The present invention relates to a paper strength enhancer. More specifically, the present invention relates to a novel paper-strengthening agent for internal paper, which contains a polyphosphate having an excellent effect of preventing corrosion of device materials.

【0002】[0002]

【従来の技術及び発明が解決しようとする課題】近年、
製紙業界は、原木やチップの材質悪化と省資源化、排水
のクローズド化に伴う抄紙水質の悪化、紙製品の高級化
と多様化等、市場を取り巻く環境がますます厳しさを増
す中で、設備の大型化や抄紙の高速化、更には古紙の回
収率増加等の施策によって製品の低コスト化に取り組ん
できた。生産性を向上させてコストダウンを図ろうとす
るとき、抄紙系のトラブルによる操業停止は抄紙速度が
大きいほど当然減産量も多くなるため極めて重大な問題
となる。抄紙系のトラブルを引き起す原因の一つとして
機器の材質腐食が挙げられる。
2. Description of the Related Art In recent years,
In the papermaking industry, as the environment surrounding the market is becoming increasingly severe, such as deterioration of raw wood and chips and resource saving, deterioration of papermaking water quality due to closed drainage, upgrading and diversification of paper products, etc. We have been working to reduce the cost of products by increasing the size of equipment, speeding up papermaking, and increasing the recovery rate of waste paper. When trying to improve productivity and reduce costs, shutting down the operation due to troubles in the papermaking system is a very serious problem because the higher the papermaking speed, the greater the reduction in production. One of the causes of papermaking problems is corrosion of equipment materials.

【0003】紙の製造は、一般にまず原木を破砕したチ
ップを蒸解釜で蒸解してリグニン等の不純物を除去した
のち、パルプに含まれる有色の不純物を塩素、次亜塩素
酸ナトリウム、二酸化塩素等の酸化剤、または亜硫酸ガ
スや亜硫酸ナトリウム等の還元剤を用いて多段漂白して
脱色される。この後、パルプの離解、叩解、各種薬品の
配合等を行う調成工程を経て次の抄紙工程に送られる。
抄紙工程ではワイヤーと呼ばれるすき網でパルプスラリ
ー中の余分な水を濾過した後、プレス工程及び乾燥工程
等を経てリールに巻き取られる。ワイヤーで濾過された
水は白水と呼ばれ、調成工程でパルプをスラリー化する
ために循環して利用される。しかし、チップの蒸解や漂
白の際に使用された各種薬品の一部がパルプ繊維に残留
したまま抄紙工程に送られるため、通常この白水中に
は、古紙に含まれる填料や河川から汲み上げられる用水
に由来する各種の金属イオンの他に、上記薬品に由来す
る塩化物イオンや硫酸イオンが多量含有されている。
[0003] In the production of paper, in general, chips obtained by crushing raw wood are first digested in a digester to remove impurities such as lignin, and then colored impurities contained in pulp are removed from chlorine, sodium hypochlorite, chlorine dioxide and the like. Or a reducing agent such as sulfurous acid gas or sodium sulfite for bleaching by multistage bleaching. Thereafter, the pulp is sent to the next papermaking process through a preparation process for disintegrating, beating and mixing various chemicals.
In the papermaking process, excess water in the pulp slurry is filtered through a mesh called a wire and then wound on a reel through a pressing process, a drying process, and the like. The water filtered through the wire is called white water and is circulated and used to slurry the pulp in the preparation process. However, some of the chemicals used during the digestion and bleaching of the chips are sent to the papermaking process with some remaining in the pulp fiber.Therefore, this white water usually contains fillers contained in waste paper and water pumped up from rivers. In addition to various metal ions derived from the above, a large amount of chloride ions and sulfate ions derived from the above chemicals is contained.

【0004】また、アニオン性紙力増強剤をパルプ繊維
に定着させるために添加される硫酸アルミニウムや、必
要に応じて抄紙pHを調製するために添加される硫酸も
白水中の硫酸イオンを増加させている。これらの各種イ
オンのうち、塩化物イオンや硫酸イオン等の腐食性物質
の混入は、金属性の装置材料を腐食して抄紙系を操業停
止に至らせる要因となるため特に大きな問題となってい
る。
[0004] Further, aluminum sulfate added to fix the anionic paper strength agent to the pulp fiber and sulfuric acid added to adjust the papermaking pH as needed also increase the sulfate ions in the white water. ing. Among these various ions, the incorporation of corrosive substances such as chloride ions and sulfate ions is a particularly serious problem because it corrodes metallic equipment materials and causes the papermaking system to stop operating. .

【0005】腐食は、上記の塩化物イオンや硫酸イオン
に起因するエロージョン及びコロージョンによるもので
あり、大量の白水が高速で流動するファンポンプからイ
ンレットに至るラインや遠心式スクリーンの内部及び攪
拌機や循環ポンプのシール部等が顕著である。この問題
の解決策としては、現状では装置材料の高級化によって
耐食性の向上を図るか又は腐食性成分を含まない蒸解用
薬品や漂白用薬品への切り替え以外に適切な手段は見い
出せず、業界は永年にわたって機器の腐食を防止する好
適な材料または方法の出現を待望していた。
Corrosion is caused by erosion and corrosion caused by the above-mentioned chloride ions and sulfate ions. A large amount of white water flows from a fan pump, which flows at a high speed, to the inlet, the inside of a centrifugal screen, and a stirrer or circulation. The seal portion of the pump is noticeable. As a solution to this problem, at present, there is no suitable means other than improving corrosion resistance by upgrading equipment materials or switching to cooking chemicals or bleaching chemicals that do not contain corrosive components. Over the years, there has been a long-awaited need for suitable materials or methods to prevent equipment corrosion.

【0006】[0006]

【課題を解決するための手段】本発明者らは、製紙業界
が直面する上記の問題を解消するため鋭意検討を重ねた
結果、機器の腐食を防止する手段として安価な無機塩を
紙力増強剤に混合してパルプスラリーに添加すれば、装
置材料を高級化することなく、また現在使用中の蒸解及
び漂白用薬品を新規なものに変更する必要もなく装置材
料の耐腐食性を向上させることが可能であることを見い
出し、本発明を完成するに至った。即ち、本発明は、装
置材料腐食防止効果に優れたポリリン酸塩類を含有する
ことを特徴とする新規な内添紙力増強剤を提供するもの
である。
Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems facing the papermaking industry. As a result, as a means for preventing equipment corrosion, inexpensive inorganic salts have been used to enhance paper strength. When added to the pulp slurry after mixing with the agent, the corrosion resistance of the equipment material is improved without upgrading the equipment material and without having to change the cooking and bleaching chemicals currently in use to new ones. It has been found that this is possible, and the present invention has been completed. That is, the present invention provides a novel internal paper-strengthening agent characterized by containing a polyphosphate having an excellent effect of preventing corrosion of device materials.

【0007】[0007]

【発明の実施の形態】以下、本発明を詳細に説明する。
本発明の目的とするところは、塩化物イオンや硫酸イオ
ンのような腐食性物質が各種の薬品を通して抄紙系に混
入し、装置材料を腐食することによって生ずる抄紙系の
トラブル停止を防止し、安定した操業が可能となるよう
な内添紙力増強剤を提供することにある。上記目的を達
成するための最も効果的な手段は腐食防止効果を有する
安価な添加物の投入である。本発明者らの研究によれ
ば、この添加物としてはポリリン酸塩が最適である。こ
のポリリン酸塩を適量内添紙力増強剤に混合しておけ
ば、紙力増強剤がパルプスラリーに添加された後ワイヤ
ーで濾過され、抄紙系を循環する白水に混入して装置材
料の表面に吸着し、水に不溶性の堅固な金属リン酸塩の
皮膜を形成して、装置材料の腐食を防止するためであ
る。また、ポリリン酸塩を予め内添紙力増強剤に混合し
ておくことによって別途に抄紙系へ供給するための添加
設備が不要となる。
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
It is an object of the present invention to prevent a trouble of stopping a papermaking system caused by corrosive substances such as chloride ions and sulfate ions entering various types of chemicals into a papermaking system and corroding equipment materials, thereby stabilizing the system. It is an object of the present invention to provide an internal paper strength enhancer that enables an improved operation. The most effective means for achieving the above object is the introduction of inexpensive additives having a corrosion preventing effect. According to the study of the present inventors, a polyphosphate is most suitable as this additive. If an appropriate amount of this polyphosphate is mixed with the internal paper strength enhancer, the paper strength enhancer is added to the pulp slurry, then filtered through a wire, mixed with white water circulating in the papermaking system, and mixed with the surface of the equipment material. This is to prevent the corrosion of the device material by forming a firm metal phosphate film insoluble in water. Further, by previously mixing the polyphosphate with the internal paper strength enhancer, an additional equipment for separately supplying the papermaking system to the papermaking system becomes unnecessary.

【0008】紙力増強剤は内添紙力増強剤と外添紙力増
強剤に大別することができるが、本発明では、抄紙系の
装置材料の腐食を防止するためには内添紙力増強剤でな
ければならない。内添紙力増強剤であればれば基本的に
どの様なタイプのものでも本発明には使用可能である。
[0008] Paper strength enhancers can be broadly classified into internal paper strength enhancers and externally added paper strength enhancers. In the present invention, in order to prevent corrosion of papermaking equipment materials, internal paper strength enhancers are used. Must be a force enhancer. Basically, any type of internal paper strength enhancer can be used in the present invention.

【0009】本発明が内添紙力増強剤に限定される理由
は以下の通りである。即ち、本発明の紙力増強剤はパル
プスラリーに添加された後パルプに定着して紙力増強効
果を発揮するが、予め紙力増強剤に混合されているポリ
リン酸塩は上記説明の如く、ワイヤーで濾過され白水に
混入して抄紙系を循環する際に腐食防止効果を発揮する
からである。このような理由から本発明は内添紙力増強
剤に限定される。
The reason why the present invention is limited to the internal paper strength enhancer is as follows. That is, the paper strength enhancer of the present invention is fixed to the pulp after being added to the pulp slurry and exhibits a paper strength enhancing effect, but the polyphosphate mixed in advance with the paper strength enhancer is as described above. This is because it is effective in preventing corrosion when it is filtered through a wire, mixed with white water and circulated through a papermaking system. For these reasons, the present invention is limited to internal paper strength enhancers.

【0010】本発明を外添紙力増強剤に適用した場合
は、ポリリン酸塩の大部分は循環白水に混入することな
くパルプ繊維と共に乾燥工程を経て製品となるため、添
加する意味が失われてしまい適切ではない。
When the present invention is applied to an external paper strength enhancer, most of the polyphosphate is converted into a product through a drying process together with the pulp fiber without being mixed into the circulating white water. It is not appropriate.

【0011】内添紙力増強剤は乾燥紙力増強剤と湿潤紙
力増強剤とに分類される。乾燥紙力増強剤としてはPA
M系とデンプン系がその代表的なものである。主流を占
めるPAM系紙力増強剤は、一般的にイオン性によりア
ニオン性PAM、カチオン性PAM、両性PAMとに分
類されるが、前述した通り、通常カチオン性PAMと称
されるものは部分的にアニオン性をも有するため両性P
AMとは明確に区別することはできない。本発明ではア
ニオン性PAMと両性PAMの二者に分類して説明す
る。
The internal paper strength enhancers are classified into dry paper strength enhancers and wet paper strength enhancers. PA as a dry paper strength agent
M type and starch type are typical examples. PAM-based paper strength enhancers that occupy the mainstream are generally classified into anionic PAM, cationic PAM and amphoteric PAM according to ionicity. Also has an anionic property, so that amphoteric P
It cannot be clearly distinguished from AM. In the present invention, description will be made by classifying the anionic PAM and the amphoteric PAM into two types.

【0012】アニオン性PAMは、アクリルアミドと、
アクリル酸やイタコン酸等のアニオン性モノマーとの共
重合、或いはPAMのアルカリによる加水分解等の公知
の方法で製造される。両性PAMは、PAMのマンニッ
ヒ反応或いはホフマン分解反応、またはアクリルアミド
と、ジメチルアミノエチルメタクリレートに代表される
カチオン性モノマー及びアクリル酸やイタコン酸等のア
ニオン性モノマーとの共重合等の公知の方法によって製
造される一方、湿潤紙力増強剤としては、尿素−ホルム
アルデヒド系樹脂、メラミン−ホルムアルデヒド系樹
脂、エポキシ−ポリアミド系樹脂等があるが、これらは
いずれも公知の方法によって製造される。上記記載の各
種内添紙力増強剤は、いずれも本発明の紙力増強剤とし
て好適に使用することができる。
The anionic PAM comprises acrylamide,
It is produced by a known method such as copolymerization with an anionic monomer such as acrylic acid or itaconic acid, or hydrolysis of PAM with an alkali. The amphoteric PAM is produced by a known method such as Mannich reaction or Hoffman decomposition reaction of PAM, or copolymerization of acrylamide with a cationic monomer represented by dimethylaminoethyl methacrylate and an anionic monomer such as acrylic acid or itaconic acid. On the other hand, examples of wet paper strength enhancers include urea-formaldehyde resins, melamine-formaldehyde resins, epoxy-polyamide resins, and the like, all of which are produced by known methods. Any of the various internal paper strength enhancers described above can be suitably used as the paper strength enhancer of the present invention.

【0013】本発明では、上記の各種内添紙力増強剤の
製造時または製造後に、ポリリン酸塩を粉体或いは水溶
液の状態で添加すれば良い。通常は、紙力増強剤を製造
するための重合反応や付加反応或いは冷却、希釈、pH
調整等の操作がすべて終了して、製品タンクやコンテナ
ーまたはローリー車等に移送する直前に、粉体のまま或
いは水溶液の状態で紙力増強剤を十分に攪拌混合しなが
ら添加する。
In the present invention, the polyphosphate may be added in the form of a powder or an aqueous solution during or after the production of the various internal paper strength enhancers. Usually, polymerization reaction or addition reaction for producing paper strength agent or cooling, dilution, pH
Immediately after the adjustment and other operations are completed, immediately before the product is transferred to a product tank, container, lorry, or the like, the paper strength enhancer is added as a powder or in the form of an aqueous solution with sufficient stirring and mixing.

【0014】本発明の装置材料腐食防止剤として使用す
ることのできるポリリン酸塩は、水溶性のものであれ
ば、基本的にどのようなものでも良い。例えば、メタリ
ン酸塩、ピロリン酸塩、トリポリリン酸塩、テトラポリ
リン酸塩等を挙げることができるが、これらの中でも水
溶解性と価格とのバランスからヘキサメタリン酸、ピロ
リン酸及びトリポリリン酸のナトリウム塩が好適であ
る。これらのポリリン酸塩はいずれも公知の方法で製造
することができる。ポリリン酸塩の中には無水物の他に
水和物があるが、いずれも本発明には使用可能である。
また、トリポリリン酸ナトリウムはl型とll型の結晶
変態があるが、両者共に本発明では使用可能である。
The polyphosphate which can be used as an apparatus material corrosion inhibitor of the present invention may be basically any water-soluble polyphosphate. For example, metaphosphate, pyrophosphate, tripolyphosphate, tetrapolyphosphate and the like can be mentioned. Among these, hexametaphosphoric acid, pyrophosphate and sodium salt of tripolyphosphate are considered from the balance between water solubility and price. It is suitable. All of these polyphosphates can be produced by a known method. Among the polyphosphates, there are hydrates as well as anhydrides, all of which can be used in the present invention.
Also, sodium tripolyphosphate has an l-type and an 11-type crystal modification, both of which can be used in the present invention.

【0015】本発明では、紙力増強剤に添加するポリリ
ン酸塩の量は、対象となる抄紙系の白水に含有される腐
食性物質の量によって多少変動するため詳しくは限定で
きないが、通常、紙力増強剤の固形分100重量部に対
して0.01乃至5.0重量部であり、好ましくは0.
05乃至1.0重量部である。添加量が0.01重量部
未満では腐食防止効果が弱く、また、5.0重量部を越
えるとその効果の割にコストが高くなるため好ましくな
い。
In the present invention, the amount of the polyphosphate to be added to the paper-strength enhancer is not limited in detail because it slightly varies depending on the amount of the corrosive substance contained in the target papermaking white water. The amount is 0.01 to 5.0 parts by weight, preferably 0.1 part by weight, based on 100 parts by weight of the solid content of the paper strength enhancer.
05 to 1.0 part by weight. If the addition amount is less than 0.01 part by weight, the effect of preventing corrosion is weak, and if it exceeds 5.0 parts by weight, the cost is increased for the effect, which is not preferable.

【0016】本発明の新規な内添紙力増強剤は、上記説
明の如く装置材料腐食防止効果を有するポリリン酸塩類
を含有しているため、抄紙系へ添加された場合に乾燥時
或いは湿潤時の紙力を増強すると共に、白水循環ライン
その他の場所の装置材料の表面に吸着して水に不溶性の
堅固な金属リン酸塩の皮膜を形成するため、腐食性物質
から装置材料を保護することができる。
Since the novel paper-strengthening agent of the present invention contains polyphosphates having an effect of preventing corrosion of device materials as described above, when added to papermaking systems, it can be dried or wet. The paper strength and protect the equipment material from corrosive substances by adsorbing on the surface of the equipment material in the white water circulation line and other places to form a solid water-insoluble metal phosphate film Can be.

【0017】[0017]

【実施例】以下、実施例により本発明を具体的に説明す
る。但し、本発明はその要旨に変更がない限りこれらの
実施例に限定されるものではない。尚、以下において部
及び%は明記しない限り重量基準を示す。 実施例1 乾燥紙力増強剤としてPAM系のアニオン性紙力増強剤
(三井東圧化学(株)製、ホープロン3150B)、マ
ンニッヒ変性紙力増強剤(三井東圧化学(株)製、ホー
プロン254MX)、ホフマン変性紙力増強剤(三井東
圧化学(株)製、新ホフマンPAM)、共重合性紙力増
強剤(三井東圧化学(株)製、ホープロン106)、お
よび湿潤紙力増強剤として尿素−ホルムアルデヒド系紙
力増強剤(ユーラミン工業(株)製、P−1500)、
メラミン−ホルムアルデヒド系紙力増強剤(ユーラミン
工業(株)製、P−6300)、エポキシ−ポリアミド
系紙力増強剤(東北ユーロイド工業(株)製、P−56
00)を用意して金属イオン封鎖能の確認試験を行っ
た。上記の各紙力増強剤の物性値を表1に示す。尚、粘
度は、BM型粘度計による25℃における測定値であ
り、単位はセンチポイズ(cP)である。また、pHは
脱イオン水で10倍に希釈してpH計で測定した値であ
る。
The present invention will be described below in detail with reference to examples. However, the present invention is not limited to these examples unless the gist is changed. In the following, parts and percentages are by weight unless otherwise specified. Example 1 PAM-based anionic paper strength enhancer (Hopron 3150B, manufactured by Mitsui Toatsu Chemicals, Inc.) and Mannich modified paper strength enhancer (Mitsui Toatsu Chemicals, Hoplon 254MX, as dry paper strength enhancers) ), Hoffman modified paper strength enhancer (Mitsui Toatsu Chemicals, Inc., New Hoffman PAM), copolymerizable paper strength enhancer (Mitsui Toatsu Chemicals, Hopron 106), and wet strength Urea-formaldehyde paper strength agent (P-1500, manufactured by Euramine Industry Co., Ltd.)
Melamine-formaldehyde paper strength enhancer (P-6300, manufactured by Euramine Industry Co., Ltd.), epoxy-polyamide paper strength enhancer (P-56, manufactured by Tohoku Euroid Industries, Ltd.)
00) was prepared and a test for confirming the sequestering ability of metal ions was performed. Table 1 shows the physical property values of each of the above paper strength enhancers. The viscosity is a value measured at 25 ° C. by a BM viscometer, and the unit is centipoise (cP). The pH is a value measured with a pH meter after diluting 10 times with deionized water.

【0018】[0018]

【表1】 試験に供するため、製紙会社から白水を採取して成分分
析を行った。その分析結果を表2に示す。尚、白水のp
Hは5.7であり、電気伝導度(単位mS/cm)は
3.43であった。
[Table 1] For the purpose of the test, white water was collected from a paper company and analyzed for components. Table 2 shows the results of the analysis. In addition, p
H was 5.7 and electric conductivity (unit: mS / cm) was 3.43.

【0019】[0019]

【表2】 まず、上記の各紙力増強剤を上水で希釈して固型分濃度
を5%に調整したのち、この各紙力増強剤水溶液100
部に対してポリリン酸塩としてヘキサメタリン酸ナトリ
ウム、ピロリン酸ナトリウム無水物及びトリポリリン酸
ナトリウム無水物を0.005部攪拌下に添加して完全
に溶解させた。これを、白水100部に対して0.1部
攪拌下に添加して再び完全に溶解させた。これを250
ml透明ポリ容器に移し、これに寸法20mm×35m
m、厚さ3mmの鉄及び18−8ステンレス製の試験片
を全面浸せきして密封し、50℃の恒温槽内にセットし
て1ヵ月間腐食試験を行った。1ヵ月経過後、試験片を
取り出して水で十分に洗浄した後、試験片の表面の状態
を観察すると共に白水中に溶出した金属の濃度を測定し
た。
[Table 2] First, each of the above-mentioned paper strength enhancers is diluted with tap water to adjust the solid content concentration to 5%, and then, each of the paper strength enhancer aqueous solutions 100
To each part, sodium hexametaphosphate, anhydrous sodium pyrophosphate and anhydrous sodium tripolyphosphate were added as polyphosphates under stirring with 0.005 part to completely dissolve. This was added to 100 parts of white water with stirring under 0.1 part and completely dissolved again. This is 250
Transfer to a clear plastic container and measure 20mm x 35m
A test piece made of iron and 18-8 stainless steel having a thickness of 3 mm and a thickness of 3 mm was immersed in the whole surface, sealed, set in a constant temperature bath at 50 ° C., and subjected to a corrosion test for one month. After one month, the test piece was taken out and washed sufficiently with water, the state of the surface of the test piece was observed, and the concentration of the metal eluted into the white water was measured.

【0020】金属表面の観察結果と白水中の溶出金属濃
度測定結果を表3〜表5に示す。なお、表中の表面状態
(表3〜表5、表7〜表9)は下記の状態を表す。 ○:光沢あり、腐食の痕跡なし良好 △:多少光沢あり、僅かに腐食の痕跡あり不良 ×:光沢なし、腐食の痕跡あり不良
Tables 3 to 5 show the observation results of the metal surface and the measurement results of the dissolved metal concentration in the white water. The surface states (Tables 3 to 5, and Tables 7 to 9) in the tables represent the following states. ○: Good gloss, no trace of corrosion △: Some gloss, poor with slight trace of corrosion ×: No gloss, poor with trace of corrosion

【0021】[0021]

【表3】 [Table 3]

【0022】[0022]

【表4】 [Table 4]

【0023】[0023]

【表5】 [Table 5]

【0024】実施例2 段ボールを予め細断した後、C.S.Fが約400ml
になるまで試験用叩解機で叩解しスラリー化した。叩解
には上記の白水を使用し、乾量基準でパルプ濃度が1%
になるように調整した。このパルプスラリーのpHは
6.0であった。このパルプスラリーをプラスチック製
ビーカーに採取し、これに固型分濃度1%のサイズ剤1
mlを加えて1分間撹拌した後、硫酸アルミニウム・1
8水和物の20%水溶液1mlを加えて再度1分間撹拌
した。
Example 2 After cutting cardboard in advance, the C.I. S. F is about 400ml
The mixture was beaten with a test beater until a slurry was obtained. The above white water is used for beating, and the pulp concentration is 1% on a dry basis.
It was adjusted to become. The pH of this pulp slurry was 6.0. This pulp slurry was collected in a plastic beaker, and a sizing agent 1 having a solid content of 1% was added thereto.
ml and stirred for 1 minute.
1 ml of a 20% aqueous solution of octahydrate was added and stirred again for 1 minute.

【0025】別に、上記の各種紙力増強剤を用意し、こ
れに紙力増強剤の固型分100部に対してポリリン酸塩
としてヘキサメタリン酸ナトリウム、トリポリリン酸ナ
トリウム無水物及びピロリン酸ナトリウム無水物を0.
1部攪拌下に添加して完全に溶解させた後、この紙力増
強剤の固型分濃度が1%になるように白水で希釈した。
この水溶液6mlを前記のパルプスラリーに添加して1
分間撹拌した後、このパルプスラリーの一部を採取して
C.S.Fを測定すると共に試験用手抄紙器を用いて手
抄紙を行った。手抄紙は、pH6.0に調整した上水を
使用して紙の米坪が120g/mになるようにパルプ
濃度を調整して行った。手抄紙終了後、湿潤した紙を試
験用プレス機で脱水した後、表面温度110℃に調整し
た回転ドラム乾燥機で乾燥した。乾燥した紙を温度20
℃、湿度65%の恒温恒湿室内で24時間調湿して紙力
測定に供した。尚、PAM系の紙力増強剤については乾
燥紙力を、尿素−ホルムアルデヒド系、メラミン−ホル
ムアルデヒド系及びエポキシ−ポリアミド系紙力増強剤
については湿潤紙力を測定した。C.S.F及び紙力の
測定結果を表6に示す。
Separately, the above-mentioned various paper strength enhancers were prepared, and sodium hexametaphosphate, anhydrous sodium tripolyphosphate and anhydrous sodium pyrophosphate were used as polyphosphates with respect to 100 parts of the solid content of the paper strength enhancer. To 0.
One part was added under stirring and completely dissolved, and then diluted with white water so that the solid content concentration of the paper strength agent was 1%.
6 ml of this aqueous solution was added to the pulp slurry to prepare 1
After stirring for one minute, a part of this pulp slurry was collected and C.I. S. F was measured and hand-made paper was made using a test hand-made paper machine. Hand paper was prepared by adjusting the pulp concentration using tap water adjusted to pH 6.0 so that the rice basis of the paper was 120 g / m 2 . After the hand-making was completed, the wet paper was dehydrated with a test press and then dried with a rotary drum dryer adjusted to a surface temperature of 110 ° C. Dry paper at temperature 20
The paper was subjected to humidity control for 24 hours in a constant temperature and humidity room at 65 ° C. and a humidity of 65% and subjected to paper strength measurement. The PAM-based paper strength enhancer was measured for dry paper strength, and the urea-formaldehyde-based, melamine-formaldehyde-based, and epoxy-polyamide-based paper strength enhancers were measured for wet paper strength. C. S. Table 6 shows the measurement results of F and paper strength.

【0026】[0026]

【表6】 [Table 6]

【0027】比較例1 紙力増強剤にポリリン酸塩を添加しなかった以外は、全
て実施例1と同様に操作して腐食試験を行った。試験片
表面の観察結果と白水中の溶出金属濃度の測定結果を表
7〜表9に示す。
Comparative Example 1 A corrosion test was carried out in the same manner as in Example 1 except that no polyphosphate was added to the paper strength agent. Tables 7 to 9 show the observation results of the test piece surface and the measurement results of the dissolved metal concentration in the white water.

【0028】[0028]

【表7】 [Table 7]

【0029】[0029]

【表8】 [Table 8]

【0030】[0030]

【表9】 [Table 9]

【0031】比較例2 紙力増強剤にポリリン酸塩を添加しなかった以外は、全
て実施例2と同様に操作してC.S.F及び紙力を測定
した。C.S.F及び紙力の測定結果を表10に示す。
Comparative Example 2 The same procedure was followed as in Example 2 except that no polyphosphate was added to the paper strength agent. S. F and paper strength were measured. C. S. Table 10 shows the measurement results of F and paper strength.

【0032】[0032]

【表10】 表6、10中、尿素−ホルとは尿素−ホルムアルデヒド
系樹脂、メラミンとはメラミン−ホルムアルデヒド系樹
脂、エポキシとはエポキシ−ポリアミド系樹脂、ヘキサ
メタとはヘキサメタリン酸ナトリウム、トリポリとはト
リポリリン酸ナトリウム、ピロとはピロリン酸ナトリウ
ムを示す。
[Table 10] In Tables 6 and 10, urea-phor is a urea-formaldehyde resin, melamine is a melamine-formaldehyde resin, epoxy is an epoxy-polyamide resin, hexameta is sodium hexametaphosphate, tripoly is sodium tripolyphosphate, pyro Means sodium pyrophosphate.

【0033】[0033]

【発明の効果】本発明の新規な内添紙力増強剤は、ポリ
リン酸塩を含有するため装置材料の腐食を防止し、抄紙
系の操業を安定化する能力を有する極めて優れた内添紙
力増強剤であり、その経済効果は多大である。
The novel paper-strengthening agent of the present invention contains a polyphosphate, and therefore has excellent ability to prevent corrosion of equipment materials and to stabilize the operation of the papermaking system. It is a force enhancer and its economic effect is great.

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 装置材料腐食防止効果に優れたポリリ
ン酸塩類を含有することを特徴とする新規な内添紙力増
強剤。
1. A novel internal paper strength enhancer comprising a polyphosphate which is excellent in preventing corrosion of device materials.
【請求項2】 ポリリン酸塩類の含有量が、紙力増強
剤の固形分100重量部に対して0.01乃至5.0重
量部である請求項1記載の新規な内添紙力増強剤。
2. The novel internal paper strength enhancer according to claim 1, wherein the content of the polyphosphate is 0.01 to 5.0 parts by weight based on 100 parts by weight of the solid content of the paper strength enhancer. .
【請求項3】 ポリリン酸塩類が、金属イオンと結合
してキレート化合物を形成する多座配位子を分子内に有
しており、且つ、水溶性である請求項1記載の新規な内
添紙力増強剤。
3. The novel internal addition according to claim 1, wherein the polyphosphate has a polydentate ligand which binds to a metal ion to form a chelate compound in the molecule and is water-soluble. Paper strength enhancer.
【請求項4】 紙力増強剤が、ポリアクリルアミド系
樹脂水溶液、尿素−ホルムアルデヒド系樹脂水溶液、メ
ラミン−ホルムアルデヒド系樹脂水溶液、エポキシ−ポ
リアミド系樹脂水溶液である請求項1記載の新規な内添
紙力増強剤。
4. The novel internal paper strength according to claim 1, wherein the paper strength enhancer is a polyacrylamide-based resin aqueous solution, a urea-formaldehyde-based resin aqueous solution, a melamine-formaldehyde-based resin aqueous solution, or an epoxy-polyamide-based resin aqueous solution. Enhancer.
【請求項5】 ポリアクリルアミド系樹脂水溶液が、
アニオン性ポリアクリルアミド、マンニッヒ変性ポリア
クリルアミド、ホフマン変性ポリアクリルアミド、アニ
オン性モノマー及びカチオン性モノマーとの共重合ポリ
アクリルアミドである請求項4記載の新規な内添紙力増
強剤。
5. An aqueous solution of a polyacrylamide resin,
The novel internal paper strength enhancer according to claim 4, which is an anionic polyacrylamide, a Mannich-modified polyacrylamide, a Hoffman-modified polyacrylamide, or a copolymerized polyacrylamide with an anionic monomer and a cationic monomer.
JP1875497A 1997-01-31 1997-01-31 New paper-reinforcing agent to be added Pending JPH10219591A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1875497A JPH10219591A (en) 1997-01-31 1997-01-31 New paper-reinforcing agent to be added

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1875497A JPH10219591A (en) 1997-01-31 1997-01-31 New paper-reinforcing agent to be added

Publications (1)

Publication Number Publication Date
JPH10219591A true JPH10219591A (en) 1998-08-18

Family

ID=11980446

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1875497A Pending JPH10219591A (en) 1997-01-31 1997-01-31 New paper-reinforcing agent to be added

Country Status (1)

Country Link
JP (1) JPH10219591A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003525342A (en) * 2000-02-28 2003-08-26 カーギル、インコーポレイテッド Improved deicing and pre-impregnating agents

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003525342A (en) * 2000-02-28 2003-08-26 カーギル、インコーポレイテッド Improved deicing and pre-impregnating agents

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