JP2539284B2 - Cleaning method for electronic parts or precision parts - Google Patents

Cleaning method for electronic parts or precision parts

Info

Publication number
JP2539284B2
JP2539284B2 JP2240569A JP24056990A JP2539284B2 JP 2539284 B2 JP2539284 B2 JP 2539284B2 JP 2240569 A JP2240569 A JP 2240569A JP 24056990 A JP24056990 A JP 24056990A JP 2539284 B2 JP2539284 B2 JP 2539284B2
Authority
JP
Japan
Prior art keywords
liquid
parts
cleaning
cloud point
rinse
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 - Lifetime
Application number
JP2240569A
Other languages
Japanese (ja)
Other versions
JPH04122480A (en
Inventor
宏造 北澤
栄二 樫原
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.)
Kao Corp
Original Assignee
Kao Corp
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 Kao Corp filed Critical Kao Corp
Priority to JP2240569A priority Critical patent/JP2539284B2/en
Priority to EP91111245A priority patent/EP0466054B1/en
Priority to DE69110359T priority patent/DE69110359T2/en
Publication of JPH04122480A publication Critical patent/JPH04122480A/en
Priority to US08/112,325 priority patent/US5350457A/en
Application granted granted Critical
Publication of JP2539284B2 publication Critical patent/JP2539284B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Detergent Compositions (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Manufacturing Of Printed Wiring (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、油脂、機械油、切削油、グリース、液晶、
フラックス等の汚れが付着した電子部品、精密部品又は
これらの組立、加工に使用される治工具類(以下、電子
部品又は精密部品類という)の洗浄方法に関し、詳細に
は、すすぎ工程で出るリンス排液を処理性に優れた洗浄
方法に関する。
DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to oils, machine oils, cutting oils, greases, liquid crystals,
Regarding the cleaning method of electronic parts, precision parts or jigs and tools used for assembling and processing them (hereinafter referred to as electronic parts or precision parts) on which dirt such as flux adheres, in more detail, rinse that appears in the rinsing step The present invention relates to a method for cleaning drainage with excellent processability.

〔従来の技術及び発明が解決しようとする課題〕[Problems to be Solved by Prior Art and Invention]

従来、精密部品、治工具等の固体表面に存在する油
脂、機械油、切削油、グリース、液晶、フラックス等の
有機物を主体とする汚れの除去には、ケロシン、ベンゼ
ン、キシレン等の炭化水素系溶剤;トリクロロエチレ
ン、テトラクロロエチレン等の塩素系溶剤;トリクロロ
トリフルオロエタン等のフロン系溶剤;界面活性剤やビ
ルダーを配合した水系の洗浄剤等が使用されてきた。特
に、電子、電気、機械等の部品にはその高洗浄性、難燃
性という特性を生かしてフロン系溶剤又は塩素系溶剤が
使用されてきた。
Conventionally, hydrocarbons such as kerosene, benzene, xylene, etc. are used to remove stains such as oils and fats, machine oils, cutting oils, greases, liquid crystals, fluxes and other organic substances that are present on the solid surfaces of precision parts, jigs and tools. Solvents: Chlorine-based solvents such as trichlorethylene and tetrachloroethylene; Freon-based solvents such as trichlorotrifluoroethane; Water-based cleaning agents containing surfactants and builders have been used. In particular, fluorocarbon-based solvents or chlorine-based solvents have been used for electronic, electrical, mechanical and other parts by taking advantage of their high cleaning properties and flame retardancy.

しかしながら、塩素系及びフロン系の溶剤を用いる洗
浄剤は、安全性、毒性、環境汚染性等に大きな問題を有
している。また、炭化水素系溶剤、特にベンゼン、キシ
レン等は毒性が高く、労働安全衛生法上の有害物に指定
されている化合物であって、これを取り扱う作業の危険
性及び煩雑さを考慮すると、洗浄剤として用いることは
好ましくない。
However, detergents using chlorine-based and chlorofluorocarbon-based solvents have major problems in safety, toxicity, environmental pollution and the like. Also, hydrocarbon solvents, especially benzene, xylene, etc., are highly toxic and are compounds designated as hazardous substances under the Industrial Safety and Health Act. Considering the danger and complexity of handling these, cleaning It is not preferable to use it as an agent.

一方、水系洗浄剤は、溶剤系洗浄剤に比較して危険性
や毒性が低く、界面活性剤やビルダー等の洗浄剤構成成
分を適宜選択することにより、優れた洗浄力を併せ持た
せることができる。
On the other hand, the water-based cleaning agent is less dangerous and less toxic than the solvent-based cleaning agent, and by appropriately selecting the cleaning agent constituents such as the surfactant and the builder, it is possible to provide excellent cleaning power. it can.

この水系洗浄剤は一般に水への溶解性が良好なため、
被洗浄材に付着した洗浄液を水系のリンス液ですすぎ洗
い(リンス)した後のリンス液(以下「リンス排液」と
いう)の排水処理性が極めて悪いという欠点があった。
その処理は、例えば凝集沈澱、加圧浮上、活性汚泥、活
性炭処理法等を用いて行うことがでできるが、いずれの
処理法も多大な費用及び設備が必要とされる。
Since this water-based cleaning agent generally has good solubility in water,
There was a drawback in that the rinse liquid after rinsing (rinsing) the cleaning liquid adhering to the material to be cleaned with an aqueous rinse liquid (hereinafter referred to as "rinse drainage liquid") had extremely poor drainage treatment.
The treatment can be carried out using, for example, coagulating sedimentation, pressure floating, activated sludge, activated carbon treatment method, etc., but each treatment method requires a great deal of cost and equipment.

従って、このような多大な処理費用設備を必要とせず
工業的に有利な電子部品又は精密部品等の洗浄方法が望
まれていた。
Therefore, there has been a demand for an industrially advantageous method for cleaning electronic parts or precision parts that does not require such a large facility for processing costs.

〔課題を解決するための手段〕[Means for solving the problem]

かかる実情において、本発明者らは、上記課題を解決
すべく鋭意研究を行なった結果、水で20倍に希釈したと
きの曇点が0〜100℃の洗浄剤組成物により洗浄した
後、5〜100℃のリンス液を用いてすすぎ洗いをし、次
いで得られたリンス排液をその曇点以上に加熱すれば、
油上汚れ及び洗浄剤等の油状成分を容易に分離すること
ができ、排水処理性が著しく改善され、更に分離された
リンス液は再利用することもできることを見い出し本発
明を完成した。
Under such circumstances, the inventors of the present invention have conducted diligent research to solve the above problems, and as a result, after washing with a detergent composition having a cloud point of 0 to 100 ° C. when diluted 20 times with water, 5 Rinse with ~ 100 ° C rinse, then heat the resulting rinse effluent to above its cloud point,
The present inventors have completed the present invention by finding that oily components such as oil stains and detergents can be easily separated, wastewater treatment properties are significantly improved, and the separated rinse liquid can be reused.

水で20倍に希釈したときに0〜100℃の曇点を有する
非イオン界面活性剤を含有する洗浄剤組成物を用いて、
該洗浄剤組成物の曇点未満の温度で洗浄した後(以下、
洗浄工程という)、5〜100℃のリンス液を用いてすす
ぎ洗いをし(以下、リンス工程という)、次いで排出さ
れたリンス排液を、その排液の曇点以上に加熱した油状
成分を分離すること(以下、分離工程という)を特徴と
する電子部品又は精密部品類の洗浄方法を提供するもの
である。
Using a detergent composition containing a nonionic surfactant having a cloud point of 0 to 100 ° C. when diluted 20 times with water,
After washing at a temperature below the cloud point of the detergent composition (hereinafter,
(Rinsing step), rinsing with a rinsing liquid at 5 to 100 ° C (hereinafter referred to as rinsing step), and then the discharged rinsing waste liquid is separated into oil components heated above the cloud point of the effluent. The present invention provides a method for cleaning electronic parts or precision parts, which is characterized by doing so (hereinafter referred to as a separation step).

本発明において、洗浄工程に用いられる洗浄剤組成物
は水で20倍に希釈したときに0〜100℃の曇点を持つも
のであるが、5〜100℃の曇点のものが特に好ましい。
ここで曇点とは、イオン交換水で20倍に希釈した洗浄剤
組成物を10〜30ml試験管にとり、1℃/分の昇温速度が
温度を上げていったとき、液がにごり出す温度という。
In the present invention, the detergent composition used in the washing step has a cloud point of 0 to 100 ° C. when diluted 20 times with water, but a cloud point of 5 to 100 ° C. is particularly preferable.
Here, the cloud point is the temperature at which the liquid becomes cloudy when the cleaning composition diluted 20 times with ion-exchanged water is placed in a 10 to 30 ml test tube and the rate of temperature rise is 1 ° C / min. Say.

このような曇点を有する洗浄剤組成物としては非イオ
ン性界面活性剤を含むものが挙げられる。ここに用いら
れる非イオン性界面活性剤としては、例えばアルキルエ
ーテル型、アルキルアリルエーテル型及びアルキルチオ
エーテル型等のエーテル型;アルキルエステル型やソル
ビタンアルキルエステル型等のエステル型;ポリオキシ
アルキレンアルキルアミン等のアミンとの縮合型;ポリ
オキシルアルキレンアルキルアマンド等のアミドとの縮
合型;ポリオキシエチレンとポリオキシプロピレンをラ
ンダムあるいはブロック縮合させたプルロニックあるい
はテトロニック型;ポリエチレンイミン系等の界面活性
剤が挙げられる。これらの中で特に炭素数4〜22の炭化
水素基を有するものが好ましい。炭素数4〜22の炭化水
素基を有する非イオン性界面活性剤を含有する洗浄剤組
成物は、油性汚れに対する親和性が増大して洗浄力が向
上すると共に、これが混入したすすぎ洗い後のリンス排
液は明確な曇点を示し、排水処理姓が特に良好である。
Examples of the detergent composition having such a cloud point include those containing a nonionic surfactant. Examples of the nonionic surfactants used here include ether types such as alkyl ether type, alkyl allyl ether type and alkyl thioether type; ester type such as alkyl ester type and sorbitan alkyl ester type; polyoxyalkylene alkyl amines and the like. Condensation type with an amine; a condensation type with an amide such as polyoxylalkylene alkylamand; a pluronic or tetronic type obtained by randomly or block-condensing polyoxyethylene and polyoxypropylene; a surfactant such as polyethyleneimine To be Among these, those having a hydrocarbon group having 4 to 22 carbon atoms are particularly preferable. A detergent composition containing a nonionic surfactant having a hydrocarbon group of 4 to 22 carbon atoms has an increased affinity for oily stains and improved detergency, and at the same time, a rinse after rinsing in which this is mixed. The effluent has a clear cloud point and the wastewater treatment is particularly good.

なお、リンス排液の排水処理性を更に向上させるため
には、洗浄剤組成物のイオン交換水による20倍希釈をそ
の曇点以上の温度に30分以上保ったとき、洗浄剤組成物
中の有機物の30%以上、好ましくは50%以上が水系より
分離する洗浄剤組成物を用いるのが好ましい。ここで洗
浄剤組成物中の有機物には、界面活性剤、ビルダー、キ
レート剤、防錆剤、消泡剤等の成分が含まれる。なお、
洗浄剤組成物への非イオン性界面活性剤の配合量は5〜
100重量%が好ましい。
In addition, in order to further improve the drainage treatment property of the rinse drainage, when the 20-fold dilution of the cleaning composition with ion-exchanged water is maintained at a temperature of the cloud point or higher for 30 minutes or more, It is preferable to use a detergent composition in which 30% or more, preferably 50% or more, of organic substances are separated from the aqueous system. Here, the organic substances in the detergent composition include components such as a surfactant, a builder, a chelating agent, a rust preventive and an antifoaming agent. In addition,
The content of the nonionic surfactant in the detergent composition is 5 to 5.
100% by weight is preferred.

洗浄工程は、例えば浸漬法、超音波洗浄法、揺動法、
スプレー法等を単独で、あるいは組合せて、上記洗浄剤
組成物の曇点未満を温度で行われる。曇点以上の温度で
洗浄すると、にごりが生じ、充分な洗浄性が得られな
い。
The cleaning process includes, for example, a dipping method, an ultrasonic cleaning method, a rocking method,
The cleaning method is performed at a temperature below the cloud point of the above-described detergent composition, either alone or in combination. Washing at a temperature above the cloud point causes turbidity, resulting in insufficient cleanability.

リンス工程に用いられるリンス液とは油性汚れ及び前
記洗浄剤組成物を含む洗浄液をすすぎ洗いするための液
であり、具体的には洗浄性の面からは純水が好ましい
が、排水処理性の面からは、リンス排液から油状成分を
分離、除去した液を用いることが好ましい。
The rinsing liquid used in the rinsing step is a liquid for rinsing a cleaning liquid containing oily stains and the cleaning composition, and specifically, pure water is preferable from the viewpoint of the cleaning property, but the effluent treatment property From the aspect, it is preferable to use a liquid obtained by separating and removing an oily component from the rinse drainage liquid.

すすぎ洗いは、5〜100℃のリンス液を用い、浸漬
性、超音波洗浄法、揺動法、スプレー法等のリンス方法
で行われる。リンス液の温度は5〜100℃が好ましく、
この範囲外の温度はコスト、設備等を考慮すると好まし
くない。リンス性の面からは特に好ましい温度は該洗浄
剤組成物の曇点以下の温度である。
The rinsing is performed by using a rinse liquid at 5 to 100 ° C. and a rinsing method such as dipping property, ultrasonic cleaning method, rocking method, and spray method. The temperature of the rinse liquid is preferably 5 to 100 ° C,
Temperatures outside this range are not preferable in consideration of cost, equipment and the like. From the viewpoint of rinsing property, a particularly preferable temperature is a temperature below the cloud point of the detergent composition.

分離工程においては、リンス排液をその排液の曇点以
上に加熱するが、リンス排液の曇点は、リンス排液を希
釈せず、そのまま洗浄剤組成物の曇点の測定と同様にし
て測定した温度という。この曇点は洗浄剤組成物を水で
20倍に希釈したときの曇点とほぼ同じである。
In the separation step, the rinse effluent is heated above the cloud point of the effluent, but the cloud point of the rinse effluent is the same as the measurement of the cloud point of the cleaning composition without diluting the rinse effluent. It is called the measured temperature. This cloud point is due to the detergent composition being treated with water.
It is almost the same as the cloud point when diluted 20 times.

分離工程においては、リンス排液はその曇点以上の温
度、好ましくは曇点より5℃以上高い温度に加熱保持さ
れる。この加熱によりリンス排液中の非イオン性界面活
性剤は水溶液を失い、またリンス排液中に乳化又は溶解
していたフラックス等の油性汚れはこれにより分離す
る。すなわち、曇点未満の温度では、油性汚れ成分が非
イオン性界面活性剤等の洗浄剤成分により可溶化又は乳
化され、リンス液中で安定化されている。しかし、曇点
以上になると、非イオン性界面活性剤は水溶性を失う。
この結果、リンス液中に可溶化していた油性汚れを水中
に保持することができず、油性汚れはその比重の大小に
より水に浮いたり沈んだりして分離する。また、非イオ
ン性界面活性剤自身を水溶性を失って水中から分離す
る。
In the separation step, the rinse effluent is heated and maintained at a temperature equal to or higher than its cloud point, preferably at a temperature higher than the cloud point by 5 ° C. or more. By this heating, the nonionic surfactant in the rinse drainage loses the aqueous solution, and the oily dirt such as flux that has been emulsified or dissolved in the rinse drainage is separated by this. That is, at a temperature below the cloud point, the oily soil component is solubilized or emulsified by the detergent component such as the nonionic surfactant and stabilized in the rinse liquid. However, above the cloud point, the nonionic surfactant loses water solubility.
As a result, the oily soil that has been solubilized in the rinse liquid cannot be retained in water, and the oily soil separates by floating or sinking in water depending on the magnitude of its specific gravity. Further, the nonionic surfactant loses water solubility and is separated from water.

分離された、油性汚れ、非イオン性界面活性剤等の油
状成分の除去は、リンス排液の受槽又は分離のための専
用槽にて、槽の上部又は下部に集まった油状成分をすく
い取る方法、連続的に抜き取る方法、分離膜等の補助設
備を利用する方法等種々の方法を用いることができる。
To remove the separated oily components such as oily stains and nonionic surfactants, a method of scooping the oily components collected at the upper or lower part of the tank in a rinse drainage tank or a dedicated tank for separation Various methods such as a continuous extraction method, a method using auxiliary equipment such as a separation membrane, and the like can be used.

これら分離を効率良く行うことにより、リンス排液は
清浄化され、再びリンス液として再使用、すなわち循環
使用することができる。
By efficiently performing these separations, the rinse waste liquid is cleaned and can be reused as the rinse liquid again, that is, can be reused.

循環使用にあっては、必要によりリンス液中の水溶性
イオンや活性剤等の有機物の除去のため、イオン交換処
理や活性炭による吸着処理あるいは膜分離等の処理をし
てもよい。
In the case of recycling, if necessary, in order to remove water-soluble ions in the rinse liquid and organic substances such as activators, ion exchange treatment, adsorption treatment with activated carbon, or membrane separation treatment may be performed.

本発明の洗浄方法は、精密部品及びその組立加工工程
に使用される治工具類の洗浄時に特に優れた効果を有す
るが、ここで精密部品とは、例えば電子部品、電機部
品、精密機械部品、樹脂加工部品、光学部品等をいう。
ここで、電子部品とは、例えば電算機及びその周辺機
器、家電機器、通信機器、OA機器、その他電子応用機器
等に用いられるプリント配線基板;ICリードフレーム、
抵抗器、コンデンサー、リレー等接点部材に用いられる
フープ材;OA機器、時計、電算機器、玩具、家電機器等
に用いられる液晶表示器;映像・音声記録/再生部品、
その関連部品等に用いられる磁気記録部品;シリコンや
セラミックスのウェハ等の半導体材料;水晶振動子等の
電歪用部便;CD、PD、複写機器、光記録機器等に用いら
れる光電変換部品などをいう。電機部品とは例えばブラ
シ、ロータ、ステータ、ハウジング等の電動機部品;販
売機や各種機器に用いられる発券用部品;販売機、キャ
ッシュディスペンサ等に用いられる貨幣検査用部品など
をいう。精密機器受品とは、例えば精密駆動機器、ビデ
オレコーダー等に用いられるベアリング;超硬チップ等
の加工用部品などをいう。樹脂加工部品とは、例えばカ
メラ、自動車等に用いられる精密樹脂加工部品などをい
う。更に、光学部品としては、カメラ、眼鏡、光学機器
等に用いられるレンズがあり、また、その他部品として
メガネフレーム、時計ケース、時計ベルト等が例示され
る。
The cleaning method of the present invention has a particularly excellent effect when cleaning precision parts and jigs and tools used in the assembly and processing steps thereof. Here, the precision parts are, for example, electronic parts, electrical parts, precision machine parts, Resin processed parts, optical parts, etc.
Here, the electronic components are, for example, a printed wiring board used for a computer and its peripheral equipment, home appliances, communication equipment, OA equipment, other electronic application equipment; IC lead frames,
Hoop materials used for contact members such as resistors, capacitors and relays; liquid crystal displays used for office equipment, watches, computer equipment, toys, home appliances, etc .; video / audio recording / playback parts,
Magnetic recording parts used for related parts; semiconductor materials such as silicon and ceramic wafers; electrostrictive devices such as crystal oscillators; photoelectric conversion parts used for CDs, PDs, copying machines, optical recording machines, etc. Say. The electric parts refer to, for example, electric motor parts such as brushes, rotors, stators and housings; ticket issuing parts used in vending machines and various devices; currency inspection parts used in vending machines, cash dispensers and the like. Precision equipment items include bearings used in precision drive equipment, video recorders, and the like; processing parts such as carbide chips. The resin-processed parts refer to precision resin-processed parts used in, for example, cameras and automobiles. Further, the optical components include lenses used in cameras, eyeglasses, optical devices and the like, and other components include eyeglass frames, watch cases, watch belts and the like.

本発明において、組立加工工程に使用される治工具類
とは、上述の各種部品例で示したような精密部品を製
造、成形、加工、組立、仕上げ等の各種工程において取
り扱う治具、工具の他、これらの精密部品を取り扱う各
種機器、その部品等をいう。
In the present invention, the jigs and tools used in the assembly process are jigs and tools handled in various processes such as manufacturing, molding, processing, assembling, and finishing of precision parts as shown in the above-mentioned various parts examples. In addition, it refers to various equipment that handles these precision parts, parts thereof, and the like.

本発明の洗浄材方法は、特に上述のうち、フラックス
の残存したプリント配線基板やガラス基板に付着した液
晶等の洗浄時に好適な性能を発揮するが、本発明の対象
となる精密部品類及び治工具類は、これらの例に限られ
るものではなく、組立加工工程において各種の加工油や
フラックス等の後工程の妨害物質、又は製品の特性を低
下させる各種の油性汚染物質を付着している一定形状の
固体表面を持つ精密部品類及び治工具類であれば、本発
明の洗浄剤方法が適用できる。
The cleaning material method of the present invention exerts suitable performance especially when cleaning the liquid crystal adhered to the printed wiring board or the glass substrate where the flux remains among the above, but the precision parts and the curing target of the present invention are used. The tools are not limited to these examples, and various kinds of processing oils, fluxes, and other post-process obstructing substances in the assembly process, or various oily contaminants that deteriorate the characteristics of the product are adhered to the tools. The cleaning agent method of the present invention can be applied to precision parts and jigs and tools having a solid surface in a shape.

これらの汚染物質が例えば油脂、機械油、切削油、グ
リース、液晶、ロジン系フラックス等の、主として有機
油分の汚れである場合、本発明の洗浄方法の特徴が特に
発揮される。これに金属粉、無機物粉、等が混入した汚
れであっても有効である。
The characteristics of the cleaning method of the present invention are particularly exerted when these contaminants are mainly organic oils such as fats, oils, machine oils, cutting oils, greases, liquid crystals, and rosin flux. It is effective even if the dirt is a mixture of metal powder, inorganic powder, and the like.

〔実施例〕〔Example〕

以下、実施例を挙げて更に詳細に説明するが、本発明
はこれらに限定されるものではない。
Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.

実施例1〜9 表1に示す組成の洗浄剤組成物を調製し、それぞれを
イオン交換水で20倍に希釈して曇点を測定した。次いで
表1に示す洗浄剤組成物を用い、ロジン系のフラックス
で処理されたプリント基板(10cm×15cm)〔テスト材
1〕、ナフテン系鉱油(40℃,350cst)が塗布(1g/m2
された鋼製テストピース(10cm×15cm)〔テスト材2〕
であるいは液晶を塗布(5g/m2)したガラス基板(10cm
×10cm)〔テスト材3〕を洗浄した。洗浄は40℃、3分
間の超音波洗浄とした。
Examples 1 to 9 A detergent composition having the composition shown in Table 1 was prepared, and each was diluted 20 times with ion-exchanged water to measure the cloud point. Next, using the cleaning composition shown in Table 1, a printed circuit board (10 cm x 15 cm) treated with a rosin flux (test material 1) and naphthenic mineral oil (40 ° C, 350 cst) were applied (1 g / m 2 ).
Steel test piece (10 cm x 15 cm) [Test material 2]
Or a glass substrate (10 cm) coated with liquid crystal (5 g / m 2 ).
X 10 cm) [Test material 3] was washed. The cleaning was ultrasonic cleaning at 40 ° C. for 3 minutes.

洗浄後の各被洗浄板(テスト材1〜3)の夫々を25℃
イオン交換水に浸漬し、1分間超音波をあてながらすす
ぎ洗い(リンス)した。リンス後の被洗浄板(テスト材
1〜3)の外観はいずれも良好であった。
25 ° C for each of the cleaned plates (test materials 1 to 3) after cleaning
It was immersed in ion-exchanged water and rinsed (rinsed) for 1 minute while applying ultrasonic waves. The washed plates (test materials 1 to 3) after rinsing all had good appearance.

次いで、使用後のリンス排液を曇点より、10〜20℃高
い温度(最高温度は100℃以下)とし30分間静置した。
この時、実施例においては油状成分が上層あるいは下層
に分離される。この水層をサンプリングしてそのCOD
(化学的酸素要求量)を測定し(A値)、前記処理前の
リンス液のCOD(B値)と比較し、油状成分分離率
〔(B値−A値)÷(B値)〕×100を算定した。これ
らの結果を表1に示す。
Then, the rinse effluent after use was brought to a temperature 10 to 20 ° C higher than the cloud point (the maximum temperature was 100 ° C or lower) and allowed to stand for 30 minutes.
At this time, in the example, the oily component is separated into the upper layer or the lower layer. This water layer is sampled and its COD
(Chemical oxygen demand) was measured (A value) and compared with the COD (B value) of the rinse liquid before the treatment, and the oil component separation rate [(B value-A value) ÷ (B value)] × 100 was calculated. Table 1 shows the results.

表1の結果より、実施例1〜9では、油状成分分離率
が高く、分離した得られたリンス液はCODが低いころか
ら油状成分が少ないことが判る。
From the results in Table 1, it can be seen that in Examples 1 to 9, the oil component separation rate was high, and the rinse liquid obtained after separation had a low oil component since the COD was low.

なお、分離率50%以上のもの(実施例のすべて)は、
その水層をリンス液として再使用しても良好なリンス性
を示し、特に分離率70%以上のものは優秀であった。
In addition, the separation rate of 50% or more (all of the examples),
Even when the aqueous layer was reused as a rinse liquid, good rinsing properties were exhibited, and particularly those having a separation rate of 70% or more were excellent.

〔発明の効果〕 本発明によれば、リンス排液中の油状成分を大巾に減
少させることができ、後の排水処理工程が簡素化でき、
工業的に有利に洗浄が行える。
[Advantages of the Invention] According to the present invention, the oil component in the rinse drainage can be greatly reduced, and the subsequent wastewater treatment process can be simplified,
Cleaning can be performed industrially.

更に、本発明により分離処理をしたリンス排液は再び
リンス液として使用できるため、経済性にも優れてい
る。
Furthermore, since the rinse effluent separated according to the present invention can be reused as a rinsing liquid, it is excellent in economical efficiency.

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 H05K 3/26 7511−4E H05K 3/26 (56)参考文献 特開 平1−210004(JP,A) 特開 昭60−235900(JP,A) 特開 昭58−34182(JP,A) 特開 昭50−56744(JP,A) 特公 昭59−5328(JP,B2) 特公 昭63−7891(JP,B2) 特公 平1−50475(JP,B2) 特公 昭56−15792(JP,B2)─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location H05K 3/26 7511-4E H05K 3/26 (56) Reference JP-A 1-210004 (JP, JP, A) JP 60-235900 (JP, A) JP 58-34182 (JP, A) JP 50-56744 (JP, A) JP 59-5328 (JP, B2) JP 63 -7891 (JP, B2) JP 1-50475 (JP, B2) JP 56-15792 (JP, B2)

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】水で20倍に希釈したときに0〜100℃の曇
点を有する非イオン界面活性剤を含有する洗浄剤組成物
を用いて、該洗浄剤組成物の曇点未満の温度を洗浄した
後、5〜100℃のリンス液を用いてすすぎ洗いし、次い
で排出されたリンス排液をその排液の曇点以上に加熱し
て油状成分を分離することを特徴とする電子部品又は精
密部品類の洗浄方法。
1. A detergent composition containing a nonionic surfactant having a cloud point of 0 to 100 ° C. when diluted 20 times with water, and a temperature below the cloud point of the detergent composition. Electronic component characterized by rinsing and then rinsing with a rinsing liquid at 5 to 100 ° C., and then heating the discharged effluent effluent above the cloud point of the effluent to separate oily components. Or a method of cleaning precision parts.
【請求項2】リンス排液から液状成分を分離した液を、
リンス液として循環使用する請求項1記載の洗浄方法。
2. A liquid obtained by separating a liquid component from the rinse drainage liquid,
The cleaning method according to claim 1, wherein the cleaning liquid is circulated and used as a rinse liquid.
JP2240569A 1990-07-10 1990-09-11 Cleaning method for electronic parts or precision parts Expired - Lifetime JP2539284B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2240569A JP2539284B2 (en) 1990-09-11 1990-09-11 Cleaning method for electronic parts or precision parts
EP91111245A EP0466054B1 (en) 1990-07-10 1991-07-05 Composition for cleaning electronic and precision parts, and cleaning process
DE69110359T DE69110359T2 (en) 1990-07-10 1991-07-05 Composition for cleaning electronic and precision parts and cleaning processes.
US08/112,325 US5350457A (en) 1990-07-10 1993-08-27 Process for cleaning electronic or precision parts and recycling rinse waste water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2240569A JP2539284B2 (en) 1990-09-11 1990-09-11 Cleaning method for electronic parts or precision parts

Publications (2)

Publication Number Publication Date
JPH04122480A JPH04122480A (en) 1992-04-22
JP2539284B2 true JP2539284B2 (en) 1996-10-02

Family

ID=17061475

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2240569A Expired - Lifetime JP2539284B2 (en) 1990-07-10 1990-09-11 Cleaning method for electronic parts or precision parts

Country Status (1)

Country Link
JP (1) JP2539284B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2726234B2 (en) * 1994-04-28 1998-03-11 アイシン化工株式会社 Machine parts cleaning equipment
JP5779782B2 (en) * 2012-03-09 2015-09-16 ユケン工業株式会社 Manufacturing method and reuse agent of regenerated cleaning liquid.
JP6099690B2 (en) * 2015-04-27 2017-03-22 住友理工株式会社 Rubber hose manufacturing method
GB2569115B (en) * 2017-12-05 2020-01-08 Safe Solvents Europe Ltd Parts-washing method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2927873A1 (en) * 1979-07-11 1981-02-05 Senkingwerk Gmbh Kg POST WASHING MACHINE
JPH0722650B2 (en) * 1986-03-31 1995-03-15 工業技術院長 Oil-water separation method for emulsified oil wastewater containing nonionic surfactant

Also Published As

Publication number Publication date
JPH04122480A (en) 1992-04-22

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