JPS6239185A - Emery cloth - Google Patents

Abstract

PURPOSE:To make emery cloth light-weight and flexible, and improve the grinding efficiency thereof by supporting upright abrasives of light-weight grain sizes. CONSTITUTION:Abrasives 2 are mixed with light-weight grains 3 of lower specific gravity, and a mixture so made is adhered to a base material 1 by using an adhesive 4. With this adhesion, the bond density of the abrasives 2 becomes rough to some extent and said abrasives 2 are vertically supported by the light- weight grains 3, thereby ensuring the availability of light-weight emery cloth and the flexibility thereof, and improving the grinding strength thereof.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、例えば金属や木材の表面を研削する研磨布紙
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a coated abrasive paper for grinding the surface of, for example, metal or wood.

〔従来の技術〕[Conventional technology]

研磨布紙は、一般に布１紙、フィルム等からなる基材と
、フェノール樹脂等からなる接着剤及びアルミナ等から
なる研削材とから構成されており、製造にあたっては、
通常、基材の表面に接着剤を塗布（下塗り）してその上
に適量の研削材を散布したのち乾燥し、さらにその上に
接着剤を塗布（上塗り）して乾燥硬化させる。Coated abrasive paper generally consists of a base material made of cloth, film, etc., an adhesive made of phenolic resin, etc., and an abrasive material made of alumina, etc. In manufacturing,
Usually, an adhesive is applied to the surface of the base material (undercoat), an appropriate amount of abrasive material is sprinkled on top of the adhesive, dried, and then an adhesive is applied on top of that (topcoat) and dried and hardened.

この場合、研削材の形状は一般に長尺状であり、研磨布
紙に接着した研削材は、付着密度がある程度粗であって
かつ直立している状態が好ましい。In this case, the shape of the abrasive material is generally long, and it is preferable that the abrasive material adhered to the coated abrasive paper have a somewhat coarse adhesion density and stand upright.

これにより、被研削材に対して比較的小さな押圧力で有
効に作用し、かつ研削に寄与する有効切刃の数が増加し
て研磨布紙の研削性能を向上させることができる。As a result, the number of effective cutting edges that effectively act on the material to be ground with a relatively small pressing force and contribute to grinding increases, thereby improving the grinding performance of the coated abrasive paper.

ところで、研磨布紙によって金属、木材等の研削作業を
行なう場合、すべての研削材が研削に寄与することはま
れであり、通常、研削材の有効切刃が破砕せずに摩耗し
た状態（ダＩＪ　ング状態）となって、未使用の研磨布
紙に対して重量で１／３〜１／２の研削材が残っている
にもか〜わらず、研削能力が低下して使用できなくなっ
てしようことが多い。By the way, when grinding metal, wood, etc. using coated abrasive paper, it is rare that all the abrasive material contributes to the grinding, and usually the effective cutting edge of the abrasive material is worn out without fracturing. Even though the abrasive material remains at 1/3 to 1/2 of the weight of the unused coated abrasive paper, its grinding ability has decreased and it is no longer usable. There are many things to do.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上記のような問題を解決するため、上塗り接着剤が乾燥
硬化する前に更に研削材を散布し、その上に接着剤を塗
布して多層構造としたダブルコートと称する研磨布紙が
市販されている。To solve the above problems, a coated abrasive paper called double coat, which has a multilayer structure in which an abrasive is further spread on the top coat adhesive before it dries and hardens, and then an adhesive is applied on top of it, is now available on the market. There is.

この研磨布紙は、研削材粒子が多層（例えば２層）構造
となっているので、通常の単層構造のもに比べて茂面が
起伏に富んでおり、高負荷研削において優れた研削能力
を備えている。しかしながら、このように層の厚い研磨
布紙は層中に占める接着剤の比率が高いため、研磨布紙
の特性であるＣＩＴ焼性に乏しく、使用上障害になって
いる。さらに、研削材の付着量が多くなると重なり合っ
て付着するものが多く、また強固で厚い接着剤層を有す
るため、研削材層全体の三次元的消耗が行なわれずに民
層のみの消耗で研削寿命が尽きる場合が多く、研削でき
なくなっても研削に寄与しなかった研削材が多量に残存
する等、高価な研削材の無駄が多（、不経済である。This coated abrasive paper has a multi-layer (for example, two-layer) structure of abrasive particles, so compared to normal single-layer structure, the surface of this coated abrasive paper has more undulations, and has excellent grinding ability in high-load grinding. It is equipped with However, since coated abrasive paper with such a thick layer has a high ratio of adhesive in the layer, it is poor in CIT scorching properties, which is a characteristic of coated abrasive paper, and is an obstacle in use. Furthermore, when the amount of abrasives attached increases, many of them overlap and adhere to each other, and because the adhesive layer is strong and thick, the entire abrasive layer does not wear out three-dimensionally, and the grinding material lasts only by wear and tear. In many cases, the abrasive material runs out, and even if grinding is no longer possible, a large amount of abrasive material that did not contribute to grinding remains, resulting in a lot of waste of expensive abrasive material (which is uneconomical).

また、ダブルコート研磨布紙は単位面積当りの研削材の
重量が大きくなるため、研磨布紙全体の重量が増大し、
実際の使用にあたっては、例えばサンダへの研磨ベルト
の着脱が面倒になり、またハンドリング特性の低下もあ
って生産性の向上を阻害していた。In addition, double-coated coated abrasive paper has a larger weight of abrasive material per unit area, so the overall weight of the coated abrasive paper increases.
In actual use, for example, it becomes troublesome to attach and detach the abrasive belt to the sander, and the handling characteristics deteriorate, which hinders productivity improvement.

このようなことから、研削材の付着密度を粗にしたオー
プンコートと称する研磨布紙も市販されている。通常の
研磨布紙は、研削材が単層でかつ密に付着されているた
め、それぞれの研削材は隣接する研削材が互いに支えと
なって直立しているのに対し、この研磨布紙は、研削材
の密度が粗であるため製造にあたって研削材を直立させ
るための支えとなるものがないので、下塗り接着剤の上
に散布した切削材が、上塗り接着剤が乾燥する前に倒れ
て寝でしまうものが多い。このため、有効切刃の数が少
なくなるばかりでなく、研削作業中に研削負荷によって
脱落し易いので研削効率が悪く、その上寿命が短かい等
の問題がある。For this reason, coated abrasive paper called open coat, which has a rougher adhesion density of abrasive material, is also commercially available. Normal coated abrasive paper has a single layer of abrasive material closely attached to it, so each abrasive material stands upright with adjacent abrasive materials supporting each other, whereas this coated abrasive paper Due to the coarse density of the abrasive, there is no support to hold the abrasive upright during manufacturing, so the cutting material sprinkled on top of the undercoat adhesive may fall over and lie down before the topcoat adhesive dries. There are many things that go away. For this reason, not only the number of effective cutting edges decreases, but also they tend to fall off due to the grinding load during the grinding operation, resulting in poor grinding efficiency and short service life.

本発明は、上記のような問題点を解決するためになされ
たもので、研削材が直立して粗に接着されその上軽量で
可撓性に富んだ研磨布紙を得ることを目的としたもので
ある。The present invention was made to solve the above-mentioned problems, and its purpose is to obtain a coated abrasive paper in which the abrasive material stands upright and is loosely bonded, and which is lightweight and highly flexible. It is something.

〔問題点を解決するための手段〕[Means for solving problems]

本発明は、上記の目的を達成すべくなされたもので、少
なくとも１種類の研削材と、この研削材より低比重の軽
量粒子を混合して基材上に付着させたものである。The present invention was made to achieve the above object, and includes a mixture of at least one type of abrasive and lightweight particles having a lower specific gravity than the abrasive, and the mixture is adhered to a substrate.

〔作用〕[Effect]

製作にあたっては、研削材の間に軽量粒子が介在するた
め研削材はこれに支えられて直立し、かつ粗に付着され
る。したがって軽量で可撓性に富み、研削効率が良くそ
の上長時間に亘って使用できる。During manufacturing, lightweight particles are interposed between the abrasive materials, so that the abrasive materials are supported by these particles, stand upright, and are loosely attached. Therefore, it is lightweight, highly flexible, has good grinding efficiency, and can be used for a long time.

〔発明の実施例〕[Embodiments of the invention]

第１図は本発明実施例を断面で示した模式図、第２図は
その平面の状態を示す模式図である。両図において、１
は基材、２は研削材、６は研削材２と混合して下塗り接
着剤の上に散布することにより研削材２の間に介在させ
た軽量粒子、４は接着剤で、研削材２は軽量粒子６に支
持されて基材１上に直立し、かつ粗に接着されている。FIG. 1 is a schematic diagram showing an embodiment of the present invention in cross section, and FIG. 2 is a schematic diagram showing its planar state. In both figures, 1
2 is a base material, 2 is an abrasive material, 6 is a lightweight particle interposed between the abrasive materials 2 by mixing with the abrasive material 2 and scattering it on the undercoat adhesive, 4 is an adhesive, and the abrasive material 2 is It stands upright on the base material 1 supported by the lightweight particles 6 and is loosely adhered.

＠量粒子６は研削材２に比較して低比重のもので、材料
としては例えば、アルミナ中空球粒子、シリカ中空球粒
子の如き無機物軽量粒子、あるいハニカワ、ポリビニー
ルアルコール及びその誘導体、セルローズ及びその誘導
体、ポリエチレン発泡粒子、ポリ塩化ビニリゾ７発抱粒
子の如き有機物軽量粒子が使用される。The particles 6 have a lower specific gravity than the abrasive material 2, and are made of, for example, inorganic lightweight particles such as alumina hollow sphere particles, silica hollow sphere particles, honeycomb, polyvinyl alcohol and its derivatives, cellulose, etc. Organic lightweight particles such as and derivatives thereof, polyethylene foam particles, and polyvinyl chloride 7-encapsulated particles are used.

また、軽量粒子６の粒径範囲は、研削材２の長径より大
きいと研削材２の有効切刃部分より突出して有効な研削
ができず、また研削材２の短径より著しく大きくなつ℃
単位面積当りの有効切刃の数が少なくなる。さらに軽量
粒子６０粒径が研削材２の短径より小さすぎると、長径
よりは著しく／」１さいことになり、研削材２の支えと
しての役目を果せず、前記の問題点を解決することがで
きない。In addition, if the particle size range of the lightweight particles 6 is larger than the long axis of the abrasive material 2, it will protrude from the effective cutting edge portion of the abrasive material 2 and effective grinding cannot be performed, and if the particle size range is significantly larger than the short axis of the abrasive material 2.
The number of effective cutting edges per unit area is reduced. Furthermore, if the particle size of the lightweight particles 60 is too small than the short axis of the abrasive material 2, it will be significantly smaller than the long axis, and will not be able to serve as a support for the abrasive material 2, thus solving the above problem. I can't.

このようなことから、軽量粒子６０粒径は研削材２の長
径の平均の６０〜９０％の範囲が好まし（、例えば研削
材２として÷６０を用いた研磨布紙ベルトの場合、研削
材２の長径の平均は約４５０μｍ、短径の平均は約６２
０μｍであるから、軽量粒子６の好ましい粒径は約１６
０〜４０Ｏｐｒｎの範囲となる。For this reason, the diameter of the lightweight particles 60 is preferably in the range of 60 to 90% of the average length of the long axis of the abrasive material 2 (for example, in the case of an abrasive cloth paper belt using ÷60 as the abrasive material 2, the abrasive material The average long axis of 2 is approximately 450 μm, and the average short axis is approximately 62 μm.
0 μm, the preferred particle size of the lightweight particles 6 is approximately 16
The range is 0 to 40 Oprn.

さらに、研削材２と軽量粒子３との混合割合は、軽量粒
子６が多すぎれば研削材２の量が相対的に少なくなるた
め、研削に寄与する有効切刃数が少なくなって研削性能
が低下し、また少なすぎると従来の研磨布紙とは゛とん
ど変らず、問題点は解決されない。実験の結果によれば
、両者の混合割合は、研削材２の見掛は比重と軽量粒子
６の見掛は比重との比が約４：１の場合、重量比で２〜
１２：１、個数比では０．５〜３：１が好ましいことが
明らかになった。Furthermore, regarding the mixing ratio of the abrasive material 2 and the lightweight particles 3, if there are too many lightweight particles 6, the amount of the abrasive material 2 will be relatively small, and the number of effective cutting edges contributing to grinding will decrease, resulting in poor grinding performance. If it decreases or is too small, the problem will not be solved because it will not be much different from conventional coated abrasive paper. According to the experimental results, when the ratio of the apparent specific gravity of the abrasive material 2 to the apparent specific gravity of the lightweight particles 6 is approximately 4:1, the mixing ratio of the two is approximately 2 to 2 in terms of weight ratio.
It has become clear that 12:1 and a number ratio of 0.5 to 3:1 are preferable.

次に、本発明の実施例を挙げ、併せて従来の研磨布紙と
比較して説明する。Next, examples of the present invention will be given and explained in comparison with conventional coated abrasive paper.

〔実施例　１〕 （１）本発明の研磨布紙 研削材として、アルミナ砥粒粒度す６０（長径の平均的
４５０μｍ、見掛は比重５．９８）２８０ｔ　／　ｍ’
と、軽量粒子として、アルミナ中空球粒子（粒径範囲１
６０〜４００μｍ、見掛は比重０．９５）４０　ｒ／Ｗ
？とを混合して基材１に付着させた無端研磨ベルト（Ａ
）。[Example 1] (1) As a coated abrasive abrasive of the present invention, alumina abrasive grain size 60 (average long axis 450 μm, apparent specific gravity 5.98) 280 t/m'
and alumina hollow sphere particles (particle size range 1) as lightweight particles.
60 to 400 μm, apparent specific gravity 0.95) 40 r/W
? An endless abrasive belt (A
).

（２）従来の研磨布紙 研削材として、アルミナ砥粒５００　？／−を単層で付
着させた通常の無端研磨ベル）　（Ｂ）。(2) Alumina abrasive grain 500 as a conventional coated abrasive abrasive material? /- attached in a single layer) (B).

（３）　　！！！研削材 ５ＵＳ６０４　１１００ＷＸ２０００Ｌ／ｍ（４）研削
条件 使用研削機　　　　湿式自動ベルト研削機ベルト回転速
度　　１０００ｍ／分 ベルト寸法　　　　１２０ｘ２１００ｍｍ被研削材送り
速度　　　　５ｍ／分 コンタクトホイル　　　　１５０ｍｇψ７５ＤＨＬ：Ｇ
＝１：１研削油　　　　　　　　　ＥＳＳＯＪＷＳ　４
４０７Ａ（商品名、）研削方向　　　　　ダウンカント 加圧条件（研削機駆動モータの負荷） ３２Ａｍｐ（無負荷時２３Ａｈ叩） 総研副長さ　　　　４００ｍ 上記によって実施した結果な艮１及び第６図に示す。こ
れから明らかなように、ベルト重量は従来の１４６０ｒ
／／ｒ？から１０３１１／−となり、約６０チ軽減でき
、しかも研削能力及び寿命はほとんど変らないことが明
らかになった。(3)! ! ! Abrasive material 5US604 1100Wx2000L/m (4) Grinding conditions Grinding machine used Wet automatic belt grinder Belt rotation speed 1000m/min Belt dimensions 120x2100mm Material to be ground feed rate 5m/min Contact foil 150mgψ75DHL:G
=1:1 grinding oil ESSOJWS 4
407A (trade name) Grinding direction Downcant pressurizing conditions (load of grinder drive motor) 32 Amp (23 Ah beating when no load) Soken sub-length 400 m The results of the above implementation are shown in Figure 1 and Figure 6. As is clear from this, the belt weight is 1460r than the conventional one.
//r? It became clear that the reduction was from 10311/- to about 60 inches, and that the grinding ability and life remained almost the same.

式　１ ％式％ （１）本発明の研磨布紙 研削材としてアルミナ砥粒粒度≠６０（長径の平均４５
ｒＪｐｍ、見掛は比重３．９　ａ　）　２８０’／ｒｒ
？と、軽量粒子としてポリビニールアルコール中空粒子
（粒径範囲１６０〜４００　、ｐｍ、見掛は比重０．７
０）６０９／ｉとを混合して基材に付着させた無端研磨
ベルト（Ａ、）。Formula 1 % Formula % (1) Alumina abrasive grain size ≠ 60 (average long axis 45
rJpm, apparent specific gravity 3.9 a) 280'/rr
? and polyvinyl alcohol hollow particles (particle size range 160-400, pm, apparent specific gravity 0.7) as lightweight particles.
0) Endless abrasive belt (A,) mixed with 609/i and attached to the base material.

（２）従来の研磨布紙 実施例１の場合と同じ（Ｂ）。(2) Conventional coated abrasive paper Same as in Example 1 (B).

（３）被研削材 実施例１の場合と同じ （４）研削条件 実施例１の場合と同じ 上記によって実施した結果は表２及び第４図に示す通り
で、軽量粒子として有機物を使用した場合（実施例２）
も、無機物を使用した場合（実施例１）とはｙ同様の結
果が得られた。(3) Material to be ground: Same as in Example 1. (4) Grinding conditions: Same as in Example 1. The results of the above procedure are as shown in Table 2 and Figure 4. When using organic matter as the lightweight particles (Example 2)
Also, the same results as in the case of using an inorganic substance (Example 1) were obtained.

艮　　２ 〔実施例　３〕 （１２本発明の研磨布紙 実施例１と同じ（Ａ）０ （２）従来の研磨布紙 研削材として、アルミナ砥粒粒度す６０３２０〜を付着
させたオープンコートによる無端研磨ベルト（Ｃ）。2 [Example 3] (12 Same as Example 1 of the coated abrasive paper of the present invention (A) 0 (2) As a conventional coated abrasive abrasive material, an open coat with alumina abrasive grain size 60320 or higher is attached. Endless polishing belt (C).

（３）被研削材 ブナ材　　２０Ｘ５０ｍ　　小口材 （４）研削条件 使用研削機　　　　６０号自動加田研磨機ベルト回転速
度　　８００　ｍ／分 ベルト寸法　　　　１１００ｘ９１５ 押付荷重　　　　　１．０ｋｌ？ 総研削時間　　　　６０分 以上の結果を採３及び第５図に示す。これから明らかな
ように両者の重量はほとんど変りな（、しかも本発明に
係る研磨ベルトはオープンコートの研磨ベルトに比べて
目結りが少なく、第５図に示すように研削力が長時間持
続すること、したがって寿命が長いことが明らかになっ
た。(3) Material to be ground: Beech wood 20 x 50 m Small size material (4) Grinding conditions Grinding machine used: No. 60 automatic Kada sander Belt rotation speed: 800 m/min Belt dimensions: 1100 x 915 Pressing load: 1.0 kl? The results for a total grinding time of 60 minutes or more are shown in Sample 3 and Figure 5. As is clear from this, the weights of the two are almost the same (in addition, the abrasive belt according to the present invention has fewer knots than the open-coat abrasive belt, and as shown in Figure 5, the abrasive belt maintains its grinding power for a long time. It has been found that this means that they have a long lifespan.

災　　６ 〔実施例　４〕 （１）本発明の研磨布紙 実施例１と同じ（Ａ）。Disaster 6 [Example 4] (1) Coated abrasive paper of the present invention Same as Example 1 (A).

（２）従来の研磨布紙 実施例３と同じ（Ｃ）。(2) Conventional coated abrasive paper Same as Example 3 (C).

（３）被研削材 フェノール積層板　２０ｘ５０ｍ小口材（４）研削条件 実施例６と同じ 上記の結果は艮４及び第６図に示す通りで、合成樹脂材
を研削した場合（実施例４）も、木材を研削した場合（
実施例３）とはｇ同様の結果が得られた。(3) Material to be ground Phenol laminate 20x50m small diameter material (4) Grinding conditions Same as Example 6 The above results are as shown in Fig. 4 and Figure 6, and when grinding synthetic resin material (Example 4) , if the wood is ground (
The same results as in Example 3) were obtained.

民　　４ 〔発明の効果〕 以上の説明から明らかなように、本発明は研削材とこの
研削材より低比重の軽量粒子を混合してこれを基材上に
付着させることにより、研削材の付着密尻がある程度粗
でしかも直立させるようにしたので、軽量で可焼性に富
み、研削力が大でしかも長寿命の研磨布紙な実現するこ
とができる。Civil 4 [Effects of the Invention] As is clear from the above explanation, the present invention improves the adhesion of the abrasive material by mixing an abrasive material with lightweight particles having a lower specific gravity than the abrasive material and adhering the mixture to a base material. Since the tight edges are made to be somewhat rough and upright, it is possible to create a coated abrasive paper that is lightweight, highly combustible, has a large grinding force, and has a long life.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の実施例を示す模式図、第２図はその平
面状態を示す模式図、第６図〜第６図はそれぞれ本発明
に係る研磨布紙と従来の研磨布紙との研削力を比較した
線図である。 １：基材、２：研削材、６：軽量粒子、４：接着剤。 代理人　弁理士　佐　藤　正　年 ｉｌ１図 第２図 ４：　樫　看　斉ｊ 第す図 ｍ＝ｆ　ｆｌｕ予開分 昭和６０マ１ミ１０）１９０ １．事件の表示 特願昭６０−１７７７２９号 ２、発明の名称 研磨布紙 ３、補正をする者 事件との関係　　特許　　出願人 名　称　理研コランダム株式会社 （氏　名） ４、代理人 欄及び図面 ７、補正の内容 （１）明細書の発明の詳細な説明の欄を次の通り補正す
る。 （２）明細書第９頁「表１」を次の通シ補正する。 表　　１ （３）図面の第５図、第６図を別紙補正図面の通り補正
する。 第５図 −石Ｔｉ旧ＩＩ予聞分Fig. 1 is a schematic diagram showing an embodiment of the present invention, Fig. 2 is a schematic diagram showing its planar state, and Figs. It is a diagram comparing grinding forces. 1: base material, 2: abrasive material, 6: lightweight particles, 4: adhesive. Agent Patent Attorney Tadashi Sato Year 1 Figure 2 Figure 4: Kashi Ken Saij Figure 2 m=f flu pre-opening 1985 Ma1 Mi 10) 190 1. Indication of the case Japanese Patent Application No. 177729/1982 2, Name of the invention Abrasive cloth 3, Person making the amendment Relationship to the case Patent Applicant Name Name Riken Corundum Co., Ltd. (Name) 4. Agent column and drawings 7, Amendment Contents (1) The detailed description of the invention column in the specification is amended as follows. (2) "Table 1" on page 9 of the specification shall be amended as follows. Table 1 (3) Figures 5 and 6 of the drawings will be corrected as per the attached revised drawings. Figure 5 - Stone Ti old II foreshadowing

Claims (4)

【特許請求の範囲】[Claims] （１）少なくとも１種類の研削材と、この研削材より低
比重の軽量粒子を混合して基材上に付着させてなる研磨
布紙。(1) A coated abrasive paper made by adhering a mixture of at least one type of abrasive and lightweight particles having a specific gravity lower than that of the abrasive to a base material. （２）前記軽量粒子の粒径範囲を研削材の長径の平均の
６０〜９０％とした特許請求の範囲第１項記載の研磨布
紙。(2) The coated abrasive paper according to claim 1, wherein the particle size range of the lightweight particles is 60 to 90% of the average long axis of the abrasive material. （３）前記軽量粒子として無機物粒子を用いた特許請求
の範囲第１項乃至第２項記載の研磨布紙。(3) The coated abrasive paper according to claims 1 and 2, wherein inorganic particles are used as the lightweight particles. （４）前記軽量粒子として有機物粒子を用いた特許請求
の範囲第１項乃至第２項記載の研磨布紙。(4) The coated abrasive paper according to claims 1 and 2, wherein organic particles are used as the lightweight particles.