JP2589395B2 - Rolls for papermaking with excellent peelability - Google Patents
Rolls for papermaking with excellent peelabilityInfo
- Publication number
- JP2589395B2 JP2589395B2 JP2080910A JP8091090A JP2589395B2 JP 2589395 B2 JP2589395 B2 JP 2589395B2 JP 2080910 A JP2080910 A JP 2080910A JP 8091090 A JP8091090 A JP 8091090A JP 2589395 B2 JP2589395 B2 JP 2589395B2
- Authority
- JP
- Japan
- Prior art keywords
- roll
- papermaking
- balance
- rolls
- porosity
- 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.)
- Expired - Fee Related
Links
- 239000011195 cermet Substances 0.000 claims description 15
- 238000000576 coating method Methods 0.000 claims description 13
- 239000011148 porous material Substances 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 11
- 239000011651 chromium Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 238000007747 plating Methods 0.000 claims description 8
- 238000005260 corrosion Methods 0.000 claims description 7
- 230000007797 corrosion Effects 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- -1 silicon organic compound Chemical class 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 claims description 3
- 229910001120 nichrome Inorganic materials 0.000 claims description 3
- 238000005507 spraying Methods 0.000 description 12
- 239000010410 layer Substances 0.000 description 9
- 239000004575 stone Substances 0.000 description 9
- 239000011247 coating layer Substances 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- 229920002379 silicone rubber Polymers 0.000 description 7
- 239000004945 silicone rubber Substances 0.000 description 6
- 239000004809 Teflon Substances 0.000 description 5
- 229920006362 Teflon® Polymers 0.000 description 5
- 239000010438 granite Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 229910001882 dioxygen Inorganic materials 0.000 description 3
- 238000007750 plasma spraying Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000002969 artificial stone Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000010289 gas flame spraying Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011295 pitch Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- 229910000984 420 stainless steel Inorganic materials 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229920001875 Ebonite Polymers 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 229910006501 ZrSiO Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Paper (AREA)
- Coating By Spraying Or Casting (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、抄紙機用のホットプレスロールやホットス
ムーザーロールなどの用途に用いて好適な抄紙用ロール
に関し、とくに該ロールと、これに湿潤状態で接触走行
する紙原反との剥離性の向上を図ったものである。Description: TECHNICAL FIELD The present invention relates to a papermaking roll suitable for use in applications such as a hot press roll and a hot smoother roll for a paper machine, and particularly to the roll and a wet This is intended to improve the releasability of the paper web that comes into contact with and runs in the state.
現在の抄紙機構において、ワイヤー部において形成さ
れた湿紙は、プレストロールによって機械的に脱水され
たのち、引き続く乾燥部において加熱，乾燥されて所用
の製品となる。ここに抄紙機用プレスロールには、十分
な圧力に耐え、かつ湿紙とロール面とが良好な剥離性を
有し、しかも長期間の運転に耐え得る等の性質が要求さ
れている。In the current papermaking mechanism, the wet paper web formed in the wire section is mechanically dewatered by a press trol, and then heated and dried in a subsequent drying section to be a required product. Here, the paper machine press roll is required to have properties such as withstanding sufficient pressure, having good peelability between the wet paper web and the roll surface, and withstanding long-term operation.
このような目的にかなうロールとして代表的なもの
に、天然花崗岩製ロール（ストーンロール）がある。こ
のロールは、耐食性，耐摩耗性および耐ドクターナイフ
性に優れるだけでなく、長期間にわたり研磨せずに使用
できるという優れた特性を有している。しかしながら、
このロールといえども湿紙に対する剥離性については充
分とはいえず、長期間の使用中に紙料の粕類、ピッチ
類、その他紙料中の粘着物等が付着し、湿紙の剥離性が
劣化することから、抄紙機を停止し、ロール表面の清掃
を余儀なくされる。また、最近のように抄紙機の大型
化、高速化が進むと、それに伴って大径，長軸のストー
ンロール用の大型花崗岩原石が必要となるが、これを無
傷で採石，運搬することは極めて難しいという問題もあ
る。A typical roll serving such a purpose is a roll made of natural granite (stone roll). This roll has not only excellent corrosion resistance, abrasion resistance and doctor knife resistance, but also excellent properties such that it can be used without polishing for a long period of time. However,
Even with this roll, the releasability of the wet paper is not sufficient. , The paper machine is stopped and the roll surface must be cleaned. In addition, as the size and speed of paper machines have increased recently, large-diameter and long-axis large-sized granite stones for stone rolls are required, but quarrying and transporting them without damage is not possible. There is also the problem that it is extremely difficult.
そこで、上記のようなストーンロールに替わるものと
して、NR,NBRおよびSBR等の高硬質ゴムに花崗岩や珪砂
等の親水性粉粒を混入して成型し、ロール表面にかかる
粉粒をモザイク状に露出させたいわゆるストナイトロー
ルが開発され、すでに実用化に及んでいる。さらに上記
の高硬質ゴムに替え、エポキシ樹脂やウレタン樹脂等の
高硬質樹脂を用い、これに親水性物質の粉粒を混入して
成型した樹脂ロールも実用に供されている。Therefore, as an alternative to the above-mentioned stone roll, NR, NBR and SBR etc. are mixed with hydrophilic powder such as granite and silica sand into high hard rubber and molded, and the powder on the roll surface is formed into a mosaic form. An exposed so-called Stonite roll has been developed and is already in practical use. Further, a resin roll formed by using a high-hardness resin such as an epoxy resin or a urethane resin instead of the above-described high-hardness rubber and mixing a powder of a hydrophilic substance with the resin is also used in practice.
これらのいわゆる人造ストーンロールは、抄紙機用プ
レスロールの他、紙料に対して剥離性を要求されるスム
ージングロールやサイジングロール、ペーパーロール等
にも使用されているが、天然花崗岩製の真性ストーンロ
ールに比べると依然として剥離性に劣り、紙料中のピッ
チ等がロールに付着して湿紙の送りが不可能となるた
め、紙切れが生じ易いという欠点があった。These so-called artificial stone rolls are used not only for press rolls for paper machines, but also for smoothing rolls, sizing rolls, paper rolls, etc., which require releasability from paper materials. Compared to a roll, the releasability is still inferior, and the pitch or the like in the paper material adheres to the roll, making it impossible to feed the wet paper, and there is a drawback that the paper is likely to break.
また、金属製シリンダーの表面に無機材料粉末、無機
材料粉末と金属粉末との混合物または金属粉末を溶射し
たり、ロール表面の疎水性成分、親水性成分の比率を変
えることによって、ロール表面の剥離性の向上を図った
ものもあるが、これらはいずれも真性ストーンロールに
比べるとやはり剥離性に劣るという欠点があった。In addition, the surface of a metal cylinder is sprayed with an inorganic material powder, a mixture of an inorganic material powder and a metal powder or a metal powder, or the ratio of a hydrophobic component and a hydrophilic component on the roll surface is changed, so that the roll surface is peeled off. Some of them have improved the removability, but all have the drawback that the releasability is inferior to that of the intrinsic stone roll.
その他、サーメット溶射被覆層に存在する気孔をテフ
ロンによって封孔することによって剥離性の向上を試み
た例もある。この方法は、テフロンと溶射被覆層との接
着性が良くないことから、被覆層を高温に加熱してテフ
ロンを圧入し、その後被覆層の冷却による収縮によって
機械的にテフロンを保持する方法であるが、この保持力
が充分ではないため、テフロンが剥離し易いというとこ
ろに問題を残していた。In addition, there is an example in which pores existing in the cermet spray coating layer are sealed with Teflon to improve the releasability. In this method, since the adhesion between the Teflon and the thermal spray coating layer is not good, the coating layer is heated to a high temperature, Teflon is press-fitted, and then the Teflon is mechanically held by shrinkage due to cooling of the coating layer. However, there is a problem in that Teflon is easily peeled off because the holding force is not sufficient.
本発明は、上記の問題を有利に解決するもので、ロー
ル表面に紙料粕類やピッチ類、その他粘着物等が付着す
ることのない剥離性に優れた抄紙用ロールを提供するこ
とを目的とする。The present invention advantageously solves the above-mentioned problems, and an object of the present invention is to provide a papermaking roll excellent in releasability without sticking of paper stocks, pitches, and other sticky substances on the roll surface. And
〔課題を解決するための手段〕 本発明は、ロール表面の剥離性に関し、長期にわたっ
て高性能が要求される抄紙用ホットプレスロールやホッ
トスムーザーロールなどいわゆる抄紙用ロールの表面に
対する被覆材料および被覆方法を種々検討した結果、開
発されたものである。Means for Solving the Problems The present invention relates to the releasability of a roll surface, and a coating material and a coating method for a surface of a so-called papermaking roll such as a papermaking hot press roll or a hot smoother roll, which require high performance over a long period of time. Was developed as a result of various studies.
すなわち本発明は、ロールシリンダー部の最外層に、
膜厚:0.05〜1.0mmの金属炭化物と金属とからなるサーメ
ットの溶射皮膜をそなえ、かつこのサーメット溶射皮膜
とロールシリダー基地との間に、耐食ニッケルめっき、
硬質クロムめっきおよびNiCr金属溶射層のうちから選ん
だ少なくともいずれか一の被覆層をそなえてなる剥離性
に富む抄紙用ロールである。That is, the present invention, in the outermost layer of the roll cylinder portion,
Film thickness: equipped with a sprayed coating of cermet consisting of metal carbide and metal of 0.05 to 1.0 mm, and between this cermet sprayed coating and the roll slider base, corrosion-resistant nickel plating,
This is a paper-making roll having a high releasability, provided with at least one coating layer selected from a hard chromium plating and a NiCr metal sprayed layer.
さらに本発明は、サーメット材料として、次の（ａ）
〜（ｄ） （ａ） Co:5〜28wt％（以下単に「％」ぜ示す）を含有
し、残部がWC、 （ｂ） Cr:15〜30％およびNi:3〜11wtを含有し、残部
がWC、 （ｃ） Co:7〜13％およびCr:1〜７％を含有し、残部が
WC、 （ｄ） NiCr:5〜35wt％を含有し、残部がCr3C2 のいずれかの組成物を用いる抄紙用ロール（第２発明）
である。Further, the present invention provides a cermet material comprising the following (a)
(D) (a) Co: 5 to 28 wt% (hereinafter simply referred to as "%"), the balance being WC, (b) Cr: 15 to 30% and Ni: 3 to 11 wt, the balance being Contains WC, (c) Co: 7-13% and Cr: 1-7%, with the balance being
WC, (d) NiCr: containing 5~35wt%, roll paper and the balance using any of the compositions of Cr 3 C 2 (second invention)
It is.
なお、上記サーメット溶射皮膜は、気孔率が0.5〜８
％で、この気孔中には珪素質有機化合物を充填して封孔
してなる抄紙用ロールである。The cermet sprayed coating has a porosity of 0.5 to 8
%, The pores are filled with a silicon organic compound, and the pores are closed.
本発明ロールを、たとえば抄紙機プレス・トップロー
ルとして用いた場合について説明すると次のとおりであ
る。The case where the roll of the present invention is used, for example, as a paper machine press top roll will be described below.
１）最新の抄紙機プレスロールの搾水用荷重は、搾水用
面圧が100〜150kg/cm2にも及ぶけれども、かような荷重
に対しても、母材ロールおよび被覆層共充分に耐え得
る。1) squeezing water for loading of the latest paper machine press roll, although dewatering a surface pressure is exerted to 100~150kg / cm 2, even against Such load, the base material roll and the coating layer both sufficiently I can stand it.
２）プレスロールで搾水の際、通過する湿紙の温度を上
昇させると搾水能力が上昇するが、本発明ロールでは、
ロールシリンダー基材の内部を中空状にして、ロール内
部に蒸気を供給してやれば、ロール表面の加熱が可能と
なり、従って、湿紙温度の上昇ひいては搾水効果の向上
が達成される。2) When squeezing water with a press roll, increasing the temperature of the passing wet paper web increases the squeezing capacity.
If the inside of the roll cylinder substrate is made hollow and steam is supplied to the inside of the roll, the roll surface can be heated, so that the temperature of the wet paper web is increased and the water squeezing effect is improved.
この点、従来のような、プレスサクションロールに対
向させて設置したスチームボックスから蒸気を噴射して
湿紙を加温する方法では、プレスロールがサクションロ
ールの場合だけしかスチームボックスを設けることがで
きなかったけれども、本発明ではかような制約はない。In this regard, in the conventional method of heating the wet paper by injecting steam from a steam box installed opposite to the press suction roll, the steam box can be provided only when the press roll is a suction roll. Although not present, there is no such restriction in the present invention.
また、真性ストーンロールは耐熱性に劣り、花崗岩部
を70℃以上に加熱すると亀裂が発生し、使用不能となっ
ていたのに対し、本発明ロールではこのような制約もな
い。In addition, the intrinsic stone roll is inferior in heat resistance, and when the granite portion is heated to 70 ° C. or more, a crack is generated and cannot be used, whereas the roll of the present invention does not have such a restriction.
３）プレストップロールに求められる必須の条件は、湿
紙の円滑な剥離性すなわちピッキングの防止であるが、
耐食性Niめっきもしくは硬質クロムめっきを下地被覆層
とし、最外層をWCまたはCr3C2などのサーメット溶射層
とする多層皮膜とし、かつ最外層の気孔率を適宜制御す
ることによって、良好な湿紙剥離性が得られる。さらに
この気孔を珪素質有機化合物を充填して封孔することに
よって、剥離性の一層の向上を図り得る。3) The essential condition required for the press top roll is smooth release of the wet paper web, that is, prevention of picking.
By corrosion resistance Ni plating or hard chrome plating and undercoat layer, a multilayer film to the cermet sprayed layer of the outermost layer such as WC or Cr 3 C 2, and controls the porosity of the outermost appropriate, good wet paper web Peelability is obtained. Further, by filling the pores with a silicon organic compound and sealing the pores, the releasability can be further improved.
ここに最外層の気孔率は、0.5〜８％程度が良好であ
る。というのは、気孔率が0.5％に満たないと、剥離性
の改善効果に乏しく、一方８％を超えると皮膜の機械的
強度が低下するだけでなく、ロール蒸気加熱時における
熱抵抗が増大してエネルギー損失を招くからである。Here, the porosity of the outermost layer is preferably about 0.5 to 8%. If the porosity is less than 0.5%, the effect of improving the releasability is poor. On the other hand, if the porosity exceeds 8%, not only the mechanical strength of the film decreases, but also the thermal resistance during heating of the roll steam increases. Energy loss.
なお、気孔率の調整は、プラズマ溶射法では、溶射
距離、溶射条件（電流，電圧，供給ガス量等）および
溶射材料の粒径などを変えることによって、また可燃
ガス炎を熱源とする溶射法では、上記、および可燃
ガスの供給圧力などを変えることによって実施すること
ができ、たとえば可燃ガス炎溶射法を用いる場合の好適
溶射条件は、酸素ガス圧:4〜9.5kgf/cm2、燃料ガス圧:3
〜8kgf/cm2である。In the plasma spraying method, the porosity is adjusted by changing the spraying distance, spraying conditions (current, voltage, supply gas amount, etc.), the particle size of the sprayed material, and the like, and by using a flammable gas flame as a heat source. In the above, it can be carried out by changing the supply pressure of the combustible gas and the like.For example, when using the combustible gas flame spraying method, preferable spraying conditions are oxygen gas pressure: 4 to 9.5 kgf / cm 2 , fuel gas Pressure: 3
Is a ~8kgf / cm 2.
また、珪素質有機化合物の充填による封孔について
は、次のようにして行うことが好ましい。Further, the sealing by filling with the silicon organic compound is preferably performed as follows.
すなわちまず、溶射被覆層の細孔部に、シリコーンワ
ニス系溶液あるいは１液性または２液性シリコーンゴム
溶液を含浸させ、ついでこれを大気中に放置するか、ま
たは必要に応じ100〜300℃で焼付けることによって硬化
させると同時に、上記シリコーンワニスあるいは１液性
または２液性シリコーンゴム等のいわゆるシリコン質を
強固に固着させる。かくして従来、抄紙機プレストプロ
ールの中でも最も剥離性が良いとされてきた真性ストー
ンロールよりも良好な剥離性が得られるのである。That is, first, the pores of the thermal spray coating layer are impregnated with a silicone varnish-based solution or a one- or two-part silicone rubber solution, and then left in the air or at 100 to 300 ° C. as necessary. At the same time as curing by baking, a so-called silicon material such as the above-mentioned silicone varnish or one-component or two-component silicone rubber is firmly fixed. Thus, better releasability can be obtained than an intrinsic stone roll, which has hitherto been considered to be the most releasable among press rolls of a paper machine.
４）抄紙機プレストップロールには、耐ドクターナイフ
性も要求されているが、ドクターナイフは、硬質の溶射
層のみに接触し、細孔に含浸された珪素質有機化合物に
接触してこれを除去するようなことはないので、上記珪
素質有機化合物による剥離性能が劣化するおそれはな
い。4) The paper machine press top roll is also required to have doctor knife resistance, but the doctor knife contacts only the hard sprayed layer, contacts the silicon organic compound impregnated in the pores, and removes it. Since it is not removed, there is no possibility that the peeling performance by the silicon organic compound is deteriorated.
５）本発明ロールを、抄紙機用スムージングロールに適
用した場合、かかるロールの使用条件はプレストップロ
ールの場合よりも温和なので何ら問題は生じない。5) When the roll of the present invention is applied to a smoothing roll for a paper machine, no problem occurs because the use condition of such a roll is milder than that of a press top roll.
参考実施例１ 外径:750mm,肉厚:20mm,面長:3500mmの溶接構造用鋼
（SM41）製のロールシリンダー表面に、プラズマ溶射法
により、 （ａ） セラミックス（Al2O3−３％TiO2,ZrSiO4,MgO−
SiO2）、 （ｂ） 金属（50％Mo−50％Ni,50％Mo−50％Ni基自溶
合金,SUS 420鋼）、 （ｃ） 炭化物サーメット（27％NiCr−WC,12％Co−WC,
10％Co−４％Cr−WC,25％NiCr−Cr3C2）、 をそれぞれ、気孔率が0.3〜12％の範囲となるように調
整しつつ、膜厚:0.5mmの溶射皮膜を被成した。Reference Example 1 A plasma spraying method was applied to the surface of a roll cylinder made of welding structural steel (SM41) having an outer diameter of 750 mm, a wall thickness of 20 mm, and a surface length of 3500 mm by plasma spraying. (A) Ceramics (Al 2 O 3 -3%) TiO 2 , ZrSiO 4 , MgO−
SiO 2), (b) metal (50% Mo-50% Ni , 50% Mo-50% Ni -based self-fluxing alloy, SUS 420 steel), (c) a carbide cermet (27% NiCr-WC, 12 % Co- WC,
10% Co-4% Cr- WC, 25% NiCr-Cr 3 C 2), respectively, porosity while adjusted in the range of 0.3 to 12%, thickness: a spray coating 0.5mm the Done.
ついで溶射皮膜の表面を研磨し、表面粗さ:1〜1.5μm
Rmaxに仕上げた。Next, the surface of the thermal spray coating is polished, and the surface roughness is 1 to 1.5 μm.
Finished to Rmax.
かくして得られた各ロールを、抄紙機プレストップロ
ールに適用し、ロール内部に1kg/cm2の飽和蒸気を供給
して表面温度:105℃に調整すると共に、線圧:200kg/cm,
抄紙速度:600m/minの条件下で、水分60％の湿紙を通過
させたときの表面異物の付着状況、湿紙の剥離状況およ
びドクターナイフの影響などについて調べた結果を第１
表に示す。Each of the rolls thus obtained was applied to a paper machine press top roll, and 1 kg / cm 2 of saturated steam was supplied to the inside of the roll to adjust the surface temperature to 105 ° C., and the linear pressure: 200 kg / cm,
First, the results of examining the adhesion of foreign matter on the surface, the detachment of the wet paper, and the effect of the doctor knife when passing a 60% moisture wet paper under the conditions of papermaking speed: 600 m / min are shown in Table 1.
It is shown in the table.
また第１図には、溶射皮膜の材質毎に調査した気孔率
と異物付着量との関係を示す。FIG. 1 shows the relationship between the porosity and the amount of adhered foreign matter, which was investigated for each material of the thermal spray coating.
第１表より明らかなように、炭化物サーメットの溶射
層を被成した場合は、金属やセラミックスを被成した場
合に比べて、異物付着状況，湿紙剥離状況およびドクタ
ーナイフ性，いずれの点でも優れていた。 As is clear from Table 1, when the sprayed layer of the carbide cermet was formed, compared with the case of forming the metal or ceramics, the foreign matter adhesion state, the wet paper peeling state and the doctor knife property were improved. It was excellent.
また、第１図より明らかなように、異物の付着挙動
は、溶射材質に大きく影響され、炭化物サーメットがと
りわけ優れていた。Further, as apparent from FIG. 1, the adhesion behavior of the foreign matter was greatly affected by the material sprayed, and the carbide cermet was particularly excellent.
この理由は、ニップ圧力によって気孔部が湿紙とのか
み合い接触部となる（無気孔部は単純接触部となる）
が、ロール表面における気孔部の面積は少ないので、か
かるかみ合い部の減少に伴って異物を残留させる力が低
減したものと考えられる。The reason is that the porosity portion becomes a meshing contact portion with the wet paper due to the nip pressure (the non-porous portion becomes a simple contact portion).
However, since the area of the pore portion on the roll surface is small, it is considered that the force for causing the foreign matter to remain is reduced with the decrease in the engagement portion.
本発明実施例２ 参考実施例１と同寸法、同材質のロールシリンダー表
面に、酸素ガスと炭化水素ガスまたは酸素ガスと水素ガ
スの燃焼炎を熱源とする高速燃焼ガス炎溶射法により、
気孔率:0.3〜10％、膜厚:0.4mmの炭化物サーメット（27
％NiCr−WC、12％Co−WC）を被成した。Second Embodiment of the Present Invention On the surface of a roll cylinder of the same dimensions and the same material as in the first embodiment, a high-speed combustion gas flame spraying method using a combustion flame of oxygen gas and hydrocarbon gas or oxygen gas and hydrogen gas as a heat source,
Porosity: 0.3-10%, thickness: 0.4mm carbide cermet (27
% NiCr-WC, 12% Co-WC).
次いで溶射皮膜の表面に、粘度:1cpの１液性シリコー
ンゴムを塗布し、これを大気中で乾燥させた。Next, a one-component silicone rubber having a viscosity of 1 cp was applied to the surface of the thermal spray coating and dried in the air.
その後、塗布面を研磨して、溶射皮膜上に残留してい
るシリコンゴムを完全に除去した。この処理により、ロ
ール表面の溶射皮膜は、その気孔（正確には外部に開口
している気孔）中にシリコンゴムが充填され、他の部分
は無気孔の溶射皮膜からなる、第２図に示すような構造
の複合皮膜が形成されたことになる。なお、第２図中、
番号１が溶射皮膜、２がその細孔部に充填されたシリコ
ンゴムである。Thereafter, the coated surface was polished to completely remove silicon rubber remaining on the sprayed coating. By this treatment, the sprayed coating on the roll surface is filled with silicone rubber in the pores (accurately, the pores opened to the outside), and the other portion is formed of a non-porous sprayed coating, as shown in FIG. This means that a composite film having such a structure was formed. In FIG. 2,
Numeral 1 is a thermal spray coating, and numeral 2 is a silicone rubber filled in its pores.
かくして得られた各ロールを用い、実施例１と同様に
して抄紙処理を行ったときの、表面異物の付着状況、湿
紙の剥離性およびドクターナイフ性について調べた結果
を第２表に示す。Table 2 shows the results of examining the adhesion state of surface foreign matter, the releasability of wet paper, and the doctor knife property when papermaking treatment was performed in the same manner as in Example 1 using each of the rolls thus obtained.
なお、比較のため従来の花崗岩製ロールを用いた場合
の調査結果も併せて示す。For comparison, the results of a survey using a conventional granite roll are also shown.
同表より明らかなように、炭化物サーメットの溶射層
を被成し、かつその細孔部にシリコン質を充填したロー
ルは、従来の真性ストーンロールを用いた場合に比べ、
異物付着状況、湿紙剥離性およびドクターナイフ性とも
同等かそれ以上であり、とくに気孔率が0.6％のものは
異物の付着状況がとりわけ優れていた。 As is clear from the table, the roll coated with a sprayed layer of carbide cermet and filled with silicon in its pores, compared with the case of using a conventional intrinsic stone roll,
The foreign matter adhesion state, the wet paper peeling property and the doctor knife property were equal to or higher than those, and those having a porosity of 0.6% were particularly excellent in the foreign matter adhesion state.
なお気孔率があまりに大きいとドクターブレードによ
る表面疵の発生が見られたので、気孔率は８％以下程度
とするのが好ましい。If the porosity is too large, the occurrence of surface flaws by the doctor blade is observed, so the porosity is preferably set to about 8% or less.
本発明実施例３ 参考実施例１と同じロールシリンダーの表面に、予め
50μｍ厚の耐食Niめっきを施したのち、実施例１と同様
にして種々の溶射皮膜を被成した。Inventive Example 3 On the same roll cylinder surface as in Reference Example 1,
After applying a corrosion-resistant Ni plating having a thickness of 50 μm, various thermal spray coatings were formed in the same manner as in Example 1.
ついで実施例１と同じ条件で、とくにpHを２〜４とし
た湿紙を通過させたときの、表面皮膜の腐食状況および
皮膜の剥離損耗状況について調査した。Then, under the same conditions as in Example 1, the state of corrosion of the surface film and the state of peeling wear of the film, particularly when the paper was passed through a wet paper having a pH of 2 to 4, were examined.
その結果、最外層の炭化物サーメット溶射皮膜の性能
維持のためには、耐食Niめっきなどの下地被覆が極めて
有効であることが確かめられた。As a result, it was confirmed that undercoating such as corrosion-resistant Ni plating was extremely effective for maintaining the performance of the outermost carbide cermet sprayed coating.
かくして本発明によれば、従来の人造ストーンロール
はもとよりのこと、真性ストーンロールと比較しても、
湿紙剥離性やドクターナイフ性は勿論、異物の付着状況
にも優れた抄紙用ロールを得ることができる。Thus, according to the present invention, not only conventional artificial stone rolls, but also intrinsic stone rolls,
It is possible to obtain a papermaking roll which is excellent not only in wet paper peeling property and doctor knife property but also in the state of adhesion of foreign matter.
第１図は、溶射皮膜の気孔率と異物付着量との関係を、
溶射材料毎に比較して示したグラフ、 第２図は、本発明ロールの表面構造を示す模式図であ
る。 １……溶射皮膜、２……シリコンゴムFIG. 1 shows the relationship between the porosity of the thermal sprayed coating and the amount of adhered foreign matter.
FIG. 2 is a schematic diagram showing the surface structure of the roll of the present invention. 1 ... sprayed coating, 2 ... silicone rubber
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−207691（ＪＰ，Ａ) 特開 昭63−264995（ＪＰ，Ａ) 実開 平１−102513（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-207691 (JP, A) JP-A-63-264995 (JP, A)
Claims (2)
0.5〜８％でその気孔中には珪素質有機化合物が充填さ
れている，金属炭化物と金属とからなる膜厚:0.05〜1.0
mmのサーメット溶射皮膜をそなえ、かつこのサーメット
溶射皮膜とロールシリンダー基地との間には、耐食性ニ
ッケルめっきもしくは硬質クロムめっきの層をそなえる
ことを特徴とする剥離性に富む抄紙用ロール。The porosity of the outermost layer of the roll cylinder portion is
0.5 to 8%, the pores of which are filled with a silicon organic compound, a film thickness of metal carbide and metal: 0.05 to 1.0
A highly releasable papermaking roll having a cermet sprayed coating of 0.5 mm and a layer of corrosion-resistant nickel plating or hard chromium plating between the cermet sprayed coating and the roll cylinder base.
（ａ）〜（ｄ）の組成 （ａ） Co:5〜28wt％を含有し、残部がWC、 （ｂ） Cr:15〜30wt％およびNi:3〜11wt％を含有し、
残部がWC、 （ｃ） Co:7〜13wt％およびCr:1〜7wt％を含有し、残
部がWC、 （ｄ） NiCr:5〜35wt％を含有し、残部がCr3C2 のいずれかである抄紙用ロール。2. The cermet material according to claim 1, wherein the following components (a) to (d) are contained: (a) Co: 5 to 28% by weight, the balance being WC, and (b) Cr: 15 to 30wt% and Ni: 3 ~ 11wt%,
The balance is WC, (c) Co: 7 to 13 wt% and Cr: 1 to 7 wt%, the balance is WC, (d) NiCr: 5 to 35 wt%, and the balance is Cr 3 C 2 Papermaking roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2080910A JP2589395B2 (en) | 1990-03-30 | 1990-03-30 | Rolls for papermaking with excellent peelability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2080910A JP2589395B2 (en) | 1990-03-30 | 1990-03-30 | Rolls for papermaking with excellent peelability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03287893A JPH03287893A (en) | 1991-12-18 |
| JP2589395B2 true JP2589395B2 (en) | 1997-03-12 |
Family
ID=13731544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2080910A Expired - Fee Related JP2589395B2 (en) | 1990-03-30 | 1990-03-30 | Rolls for papermaking with excellent peelability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2589395B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07111036B2 (en) * | 1990-10-08 | 1995-11-29 | ヤマウチ株式会社 | Method for manufacturing press roll for paper machine |
| JP2537083Y2 (en) * | 1992-06-25 | 1997-05-28 | 石川島播磨重工業株式会社 | Press roll |
| KR100256372B1 (en) * | 1995-12-29 | 2000-05-15 | 이구택 | Chromium carbide based cermet multilayer coating material with excellent buildup resistance |
| JP3732479B2 (en) * | 2002-11-20 | 2006-01-05 | 大日本印刷株式会社 | PRINTING DEVICE MEMBER AND PRINTING DEVICE USING THE MEMBER |
| JP5137608B2 (en) * | 2008-02-14 | 2013-02-06 | トーカロ株式会社 | Metal member with thermal spray coating with excellent carburization resistance |
| CN117904572B (en) * | 2024-01-15 | 2024-07-02 | 东北大学 | A method for improving the wear resistance of hydrophobic coating by turning |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI70273C (en) * | 1985-01-09 | 1986-09-15 | Valmet Oy | SYNTHETIC PRESS RELEASES FOR THE FRAMEWORK OF THE FRAMEWORK |
| JPS63264995A (en) * | 1987-04-15 | 1988-11-01 | 株式会社クボタ | Press roll for paper making machine |
| JPH08399Y2 (en) * | 1987-12-28 | 1996-01-10 | 三菱重工業株式会社 | Press roll for paper machine |
-
1990
- 1990-03-30 JP JP2080910A patent/JP2589395B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03287893A (en) | 1991-12-18 |
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