JPH1088175A - Undiluted solution composition of water-soluble lubricant for ironing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an undiluted solution composition of a water-soluble lubricant for ironing capable of not only providing a high quality DI can but also accomplishing improvement of treatment of the waste water. SOLUTION: This undiluted solution composition of a water-soluble lubricant for ironing is used when a metal plate is subjected to cupping by using a water- insoluble lubricant for the cupping having 5-70mm<2> /s dynamic viscosity at 40 deg.C, and further subjected to ironing or redrawing and ironing by using the water-soluble lubricant for the ironing to form a DI can. The undiluted solution composition of the water-soluble lubricant for the ironing includes a mineral oil and/or synthetic hydrocarbon oil and further is regulated so that the average particle diameter may be <=1μm when being diluted by water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an undiluted composition of a lubricant used in the production of DI cans. More specifically, the present invention relates to drawing a metal plate using a water-insoluble drawing forming lubricant, Ironing or redrawing / ironing and then D
The present invention relates to a stock solution of a lubricant for ironing and forming, which is used when manufacturing an I can.

[0002]

2. Description of the Related Art DI cans are used as containers for beer and soft drinks, and are formed by drawing (cupping) a metal plate.
Next, the drawn product is iron-formed or re-drawn and iron-formed to form a can. The body and bottom of the can have a seamless structure. Draw-forming refers to a processing method in which a plate cut out in a disc shape is fixed with a wrinkle holding device and formed into a cup with a bottom using a tool composed of a punch and a die. Refers to the process of thinning and extending the side wall of If the diameter of the plate cut out in a disk shape is excessively large compared to the diameter of the punch, it may be difficult to obtain a cup of a required shape by one drawing process. In the second step, redrawing is performed so as to have a required shape before ironing, which is a subsequent step. In the manufacture of DI cans, cups having a relatively large diameter are manufactured by a draw forming machine called a cupping press, then redrawing is first performed in a body maker (can forming machine), and then ironing is immediately performed. Is generally performed. In carrying out such draw forming-ironing or draw forming-redrawing / ironing, an emulsion-type lubricant has conventionally been used in each step. That is,
A lubricant used in the first step of the DI can forming process (drawing lubricant) and a lubricant used in the second step of ironing or redrawing / ironing (ironing lubrication) In each case, an emulsion-type lubricant was used.

[0003]

By the way, conventionally, DI
During the can forming process, an emulsion-type lubricant was generally used during drawing, but when lubricating with an emulsion, the oil in the emulsion was selectively and effectively adhered to the lubrication points. There is an issue of whether to do it. Such a property that the oil adheres to the lubricating point is called plate-out property, and even if the emulsion is composed of a component having excellent lubricity, a lubricant having poor plate-out property should be substantially used. Can not. Many studies have been carried out in various fields to solve such problems, but no uniform conclusions have been made to improve the plate-out property. Emulsion type lubricants having a high viscosity are being developed. However, an emulsion-type lubricant obtained by such a method may not be able to cope with a change in molding conditions due to a change in the design of a can or the like. It is also conceivable to supplement the insufficient plate-out property by adding an excessive lubricating component or the like. However, a change in the formulation of the lubricant accompanying a change in the molding conditions reduces the working efficiency.

[0004] Further, even if a water-insoluble lubricant is used as the draw-forming lubricant, if the lubricity is insufficient, the draw-forming itself cannot be performed, and the cup-shaped product may be broken, Even if no break occurs, excessive friction occurs between the tool (punch, die) and the metal material, resulting in partial flaws on the surface of the cup-shaped molding. The scratches thus generated may remain on the surface even after the ironing, which is the second step in the molding process of the DI can, is completed, which significantly impairs the aesthetic appearance of the can and lowers the commercial value.

[0005] In addition, the draw forming lubricant remaining on the surface of the cup-shaped molded product after drawing contributes to the lubrication between tools (punches, dies) and the surface of the cup-shaped molded product at the time of ironing. If the lubricity of the molding lubricant is insufficient, the surface of the can after the ironing is damaged, which significantly impairs the aesthetic appearance of the can and lowers its commercial value. On the other hand, if the lubricity of the drawing lubricant is excessive, the following obstacles occur. If the lubricity of the drawing forming lubricant is excessive, slipping occurs between the plate and the wrinkle holding portion in the plate fixing portion (wrinkle holding portion) at the time of draw forming, and the fixability is reduced. (Opening), wrinkles are generated, or partial elongation of the plate occurs, so-called "ears" are generated. When wrinkles occur, the plate thickness of the can flange becomes uneven, but when the plate thickness becomes uneven, the ironing rate in the thicker part in the ironing process in the subsequent process increases, resulting in insufficient lubrication. Burn-in occurs, and a surface defect called bleed-through occurs. Further, the unevenness of the plate thickness causes necking cracks in necking, which is the final forming step. In addition, cups with “ears” catch the “ears” on the transport line sent to the ironing machine in the post-process, causing a problem that they cannot be smoothly sent to the ironing machine and hinder can productivity. Let it. In addition, when the lubricating property of the drawing forming lubricant is excessive, there is also a problem that the plate cannot be fed by the plate feed roll provided for feeding the aluminum plate or the steel plate to the drawing forming device.

On the other hand, the cans after ironing are degreased and washed with an aqueous solution (washing solution) containing a surfactant, subjected to a surface chemical treatment for corrosion prevention, and then coated and printed, and then subjected to opening ( Draw-forming (necking) and edge bending (flanging) of the mouth are performed before shipment. Therefore, when the composition of the ironing molding lubricant is inappropriate, the surfactant concentration in the ironing molding lubricant cleaning liquid cannot be reduced in the degreasing / cleaning step after the can body is manufactured, and as a result, Improvement in wastewater treatment cannot be achieved. In the degreasing / washing process, metal abrasion powder generated during molding is also washed away together with the lubricant component. However, if the composition of the ironing lubricant is inappropriate, the metal abrasion powder remains on the can surface after cleaning. Then, a stain on the can called black spot occurs.

In recent years, from the viewpoint of global environmental protection and resource saving,
For lubricants used in drawing, ironing, redrawing and ironing, especially lubricants used in the second step of manufacturing, ironing or redrawing and ironing (lubrication for ironing) In addition to lubricity, there has been a strong demand for good degreasing and cleaning properties of cans after molding, and good drainage treatment of cleaning waste liquid that can reach several hundred tons per day. . In order to manufacture high-quality DI cans, a lubricant (drawing lubricant) used for drawing, which is the first step in the forming process of the DI can, and ironing or redrawing, which is the second step, are used. The combination of the lubricant used for ironing (ironing molding lubricant) is important, and if the combination is inappropriate, high-quality D
I can't get a can.

[0008] Accordingly, not only is the lubricating property excellent, but also the degreasing of the can after molding can be performed by using the conventionally used emulsion type lubricant.
Combination of lubricant for drawing / ironing or drawing / redrawing / ironing, which is more excellent in detergency and can reduce the concentration of surfactant in the cleaning liquid to improve drainage treatment Was strongly desired.

[0009]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the above problems, and as a result, formed a metal plate by drawing using a water-insoluble drawing forming lubricant and then specified. Iron-forming or re-drawing / ironing of a drawn molded article using a water-soluble ironing stock lubricant composition having an average particle diameter of not more than a specific value when diluted with water and diluted with water. It has been found that by molding, a high-quality DI can can be manufactured and the drainage treatment property can be improved, and the present invention has been completed.

That is, the water-soluble ironing stock solution for ironing of the present invention has a kinematic viscosity at 40 ° C. of 5
When a DI can is produced by drawing using a water-insoluble ironing lubricant of up to 70 mm ² / s and then ironing or redrawing and ironing using a water-soluble ironing lubricant. A stock solution of a water-soluble ironing lubricant for use, which contains mineral oil and / or synthetic hydrocarbon oil and has an average particle diameter of 1 μm when diluted with water.
It is the following. It is preferable that a synthetic ester oil is included together with the mineral oil and / or the synthetic hydrocarbon oil.

As described above, a metal plate is formed by drawing using a water-insoluble drawing forming lubricant, and then has a specific composition and an average particle diameter becomes less than a specific value when diluted with water. Since the draw-forming product is diluted or diluted with water and then drawn or ironed or redrawn / ironed, the drawability and ironability are excellent. Can be manufactured and also
Since it is excellent in cleaning property and degreasing property, it is possible to achieve improvement in drainage treatment property.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below.
The water-soluble ironing stock lubricant composition of the present invention contains a mineral oil and / or a synthetic hydrocarbon oil.
As the mineral oil, the lubricating oil fraction obtained by atmospheric distillation and vacuum distillation of crude oil, solvent removal, solvent extraction,
A paraffinic or naphthenic mineral oil obtained by appropriately combining one or more refining means such as hydrocracking, solvent dewaxing, catalytic dewaxing, hydrorefining, sulfuric acid washing, and clay treatment. Can be mentioned. The kinematic viscosity of the mineral oil is not particularly limited, but from the viewpoint of processability, the kinematic viscosity at 40 ° C. is 0.5 to 120 mm ² /
s, preferably 1 to 100 mm ² / s.

Specific examples of the above synthetic hydrocarbon oil include olefins, polyolefins, hydrides of polyolefins, alkylbenzenes and alkylnaphthalenes. The olefin has 8 to 28 carbon atoms, preferably 10 to 24 carbon atoms, more preferably 1 to 28 carbon atoms.
2 to 20 are used. The position of the double bond in the olefin is arbitrary; use an α-olefin with a double bond at the terminal, an internal olefin with a double bond at a position other than the terminal, or a mixture of these α-olefin and internal olefin. Can be. Further, as the olefin, any of a linear olefin and a branched olefin can be used. The linear olefin can be obtained by, for example, low polymerization of ethylene, and the branched olefin can be obtained by, for example, low polymerization of propylene, butene, isobutylene, or the like. As the olefin used in the present invention, specifically, for example, a linear or branched octene, a linear or branched nonene, a linear or branched decene,
Straight or branched undecene, straight or branched dodecene, straight or branched tridecene, straight or branched tetradecene, straight or branched pentadecene, straight or branched Hexadecene, linear or branched heptacene, linear or branched octadecene, linear or branched nonadecene, linear or branched icosene, linear or branched henicosene, Linear or branched dococene, linear or branched tricocene, linear or branched tetracocene, linear or branched pentacocene, linear or branched hexacocene, linear or branched Heptacocene, linear or branched octacocene, and mixtures thereof. Examples of the polyolefin include ethylene-propylene copolymer, polybutene, 1-octene oligomer, 1-decene oligomer and the like. As the hydride of polyolefin, those obtained by hydrogenating the above-mentioned polyolefin can be used. The kinematic viscosity of the synthetic hydrocarbon oil is not particularly limited, but from the viewpoint of processability, the kinematic viscosity at 40 ° C is 0.5 to 120 mm ² / s, preferably 1 to 10 mm ² / s.
Desirably, it is 0 mm ² / s. The mineral oil and / or synthetic hydrocarbon oil described above may be used alone or in combination of two or more as the water-soluble ironing lubricant stock solution composition in the present invention. The total amount of the mineral oil and / or the synthetic hydrocarbon oil in the water-soluble ironing agent stock solution composition of the present invention is optional.
From the viewpoint of processability, the lower limit is 3% by mass, preferably 5% by mass, more preferably 10% by mass based on the total amount of the stock solution composition.
The upper limit is preferably 90% by mass based on the total amount of the stock solution composition, from the viewpoint of dilution stability, detergency, and degreasing property.
Preferably, it is 80% by mass, more preferably 70% by mass.

The above water-soluble ironing stock lubricant composition is diluted with water and used as an ironing lubricant. In the present invention, the composition has an average particle diameter of 1 μm or less when diluted with water. Preferably it is 0.7 μm, more preferably 0.5 μm. If the average particle diameter at the time of dilution with water is larger than 1 μm, not only is the degreasing property and cleaning property poor, but also the dilution stability is problematic, and stable operation cannot be expected. The average particle diameter at the time of dilution can be measured by a device using a laser diffraction and / or light scattering method, for example, a particle size distribution analyzer LPA3000 / LPA manufactured by Otsuka Electronics Co., Ltd.
It can be measured at 3100 or the like.

The stock solution of a water-soluble ironing lubricant for use in the present invention exhibits excellent workability, detergency, and degreasing property, but the workability is further improved by adding a synthetic ester oil thereto. The synthetic ester oil is 3 to 60 based on the total amount of the composition.
% By mass, preferably 5 to 50% by mass, more preferably 1% by mass.
It is desirable to contain 0 to 40% by mass.

The alcohol constituting the synthetic ester oil may be a monohydric alcohol or a polyhydric alcohol, and the acid may be a monobasic acid or a polybasic acid.
As the monohydric alcohol, one having usually 1 to 24, preferably 1 to 12, and more preferably 1 to 8 carbon atoms is used. Such an alcohol may be a straight-chain alcohol or a branched alcohol. As the alcohol having 1 to 24 carbon atoms, specifically, for example, methanol, ethanol, linear or branched propanol, linear or branched butanol, linear or branched pentanol, linear Linear or branched hexanol, linear or branched hepanol, linear or branched octanol, linear or branched nonanol, linear or branched decanol, linear or branched Undecanol, linear or branched dodecanol, linear or branched tridecanol, linear or branched tetradecanol, linear or branched pentadecanol, linear or branched hexadecanol Decanol, linear or branched heptadecanol, linear or branched octadecanol, linear or branched nonade Nord, linear or branched Ikosanoru, linear or branched Hen'ikosanoru, linear or branched docosanol,
Examples thereof include linear or branched tricosanol, linear or branched tetracosanol, and mixtures thereof. As the polyhydric alcohol, those having 2 to 10 valency, preferably 2 to 6 valency are used. Specific examples of the di- to polyhydric alcohols include, for example, ethylene glycol, diethylene glycol, polyethylene glycol (3 to 15 mer of ethylene glycol), propylene glycol, dipropylene glycol, and polypropylene glycol (3 to 15 of propylene glycol). ),
1,3-propanediol, 1,2-propanediol, 1,3-butanediol, 1,4-butanediol, 2-methyl-1,2-propanediol, 2-methyl-1,3-propanediol, Dihydric alcohols such as 1,2-pentanediol, 1,3-pentanediol, 1,4-pentanediol, 1,5-pentanediol and neopentyl glycol; glycerin, polyglycerin (glycerin dimer to octamer, For example, diglycerin, triglycerin, tetraglycerin, etc.), trimethylolalkane (trimethylolethane, trimethylolpropane, trimethylolbutane, etc.) and their 2
~ 8-mers, pentaerythritol and their 2-4
Monomer, 1,2,4-butanetriol, 1,3,5-pentanetriol, 1,2,6-hexanetriol,
Polyhydric alcohols such as 1,2,3,4-butanetetrol, sorbitol, sorbitan, sorbitol glycerin condensate, adonitol, arabitol, xylitol, mannitol; xylose, arabinose, ribose, rhamnose, glucose, fructose, galactose, mannose, Examples include saccharides such as sorbose, cellobiose, maltose, isomaltose, trehalose, and sucrose, and mixtures thereof. Among these, ethylene glycol, diethylene glycol, polyethylene glycol (3-10 mer of ethylene glycol), propylene glycol, dipropylene glycol, polypropylene glycol (3-10 mer of propylene glycol), 1,3-propanediol, 2-methyl-1,2-propanediol, 2-methyl-1,3-propanediol, neopentyl glycol, glycerin, diglycerin, triglycerin, trimethylolalkane (trimethylolethane, trimethylolpropane, trimethylolbutane, etc. ) And dimers and tetramers thereof, pentaerythritol, dipentaerythritol 1,2,4-butanetriol, 1,3,3
2- to 6-valent compounds such as 5-pentanetriol, 1,2,6-hexanetriol, 1,2,3,4-butanetrol, sorbitol, sorbitan, sorbitol glycerin condensate, adonitol, arabitol, xylitol and mannitol Polyhydric alcohols and mixtures thereof are more preferred. More preferred are ethylene glycol, propylene glycol, neopentyl glycol, glycerin, trimethylolethane, trimethylolpropane, pentaerythritol, sorbitan, and mixtures thereof.

The monobasic acid is usually a fatty acid having 6 to 24 carbon atoms, which may be linear or branched, and may be saturated or unsaturated. Specifically, for example, linear or branched hexanoic acid, linear or branched heptanoic acid, linear or branched octanoic acid,
Linear or branched nonanoic acid, linear or branched decanoic acid, linear or branched undecanoic acid, linear or branched dodecanoic acid, linear or branched tridecanoic acid, Linear or branched tetradecanoic acid, linear or branched pentadecanoic acid, linear or branched hexadecanoic acid, linear or branched heptadecanoic acid, linear or branched octadecanoic acid, Linear or branched hydroxyoctadecanoic acid, linear or branched nonadecanoic acid, linear or branched icosanoic acid, linear or branched henicosanoic acid, linear or branched docosanoic acid Linear or branched trichosanoic acid, saturated fatty acids such as linear or branched tetracosanoic acid, linear or branched hexenoic acid, linear or branched heptene , Linear or branched octenoic acid, linear or branched nonenoic acid, linear or branched decenoic acid, linear or branched undecenoic acid, linear or branched dodecenoic acid , Linear or branched tridecenoic acid, linear or branched tetradecenoic acid,
Linear or branched pentadecenoic acid, linear or branched hexadecenoic acid, linear or branched heptadecenoic acid, linear or branched octadecenoic acid, linear or branched hydroxyoctadecene Acid, linear or branched nonadecenoic acid, linear or branched eicosenoic acid, linear or branched henicosenoic acid, linear or branched docosenic acid, linear or branched trichocene Examples include acids, unsaturated fatty acids such as linear or branched tetracosenoic acids, and mixtures thereof. Among these, a saturated fatty acid having 8 to 20 carbon atoms, an unsaturated fatty acid having 8 to 20 carbon atoms, and a mixture thereof are particularly preferable. Examples of the polybasic acid include dibasic acids having 2 to 16 carbon atoms and trimellitic acid. 2 to 1 carbon atoms
The dibasic acid of No. 6 may be linear or branched, and may be saturated or unsaturated. Specifically, for example, ethanedioic acid, propanedioic acid, linear or branched butanedioic acid, linear or branched pentanedioic acid, linear or branched hexanedioic acid, linear Or branched heptane diacid, straight or branched octane diacid, straight or branched nonanedioic acid, straight or branched decandioic acid, straight or branched undecane diacid Acid, linear or branched dodecandioic acid, linear or branched tridecandioic acid, linear or branched tetradecandioic acid, linear or branched pentadecandioic acid, linear or Saturated dibasic acids such as branched hexadecandioic acid, linear or branched butenedioic acids, linear or branched pentenedioic acids, linear or branched hexenedioic acids, linear or Branched heptenedioic acid, linear or branched Octenedioic acid, linear or branched nonenedioic acid, linear or branched decenedioic acid, linear or branched undecenedioic acid, linear or branched dodecenedioic acid, linear Unsaturated dibasic acids such as linear or branched tridecene diacid, linear or branched tetradecene diacid, linear or branched pentadecene diacid, linear or branched hexadecene diacid and the like And the like.

Further, as a combination of an alcohol and an acid, an ester of a monohydric alcohol and a monobasic acid, an ester of a polyhydric alcohol and a monobasic acid, an ester of a monohydric alcohol and a polybasic acid, a polyhydric alcohol and a polybasic Esters with acids Mixed esters with monohydric alcohols, mixtures with polyhydric alcohols and polybasic acids Mixed esters with polyhydric alcohols and mixtures with monobasic acids, polybasic acids Mixtures with monohydric alcohol, polyhydric alcohol Any combination, such as a mixed ester of carboxylic acid with a monobasic acid or a polybasic acid, is possible. When a polyhydric alcohol is used as the alcohol component, a complete ester in which all of the hydroxyl groups in the polyhydric alcohol are esterified may be used, or a partial ester in which some of the hydroxyl groups remain unesterified and remain as hydroxyl groups may be used. . When a polybasic acid is used as the acid component, a complete ester in which all of the carboxyl groups in the polybasic acid are esterified may be used. It may be an ester. From the viewpoint of further improving the processability, it is preferable to use one or more esters selected from the above and from the viewpoint of enhancing the processability as the water-soluble ironing lubricant stock solution composition of the present invention. Among them, one or two or more esters selected from and among them are more preferable, and one or two or more esters selected from among them are still more preferable. Most preferably, it is used.

The water-soluble ironing stock lubricant composition of the present invention is free of any other components as long as it contains the mineral oil and / or the synthetic hydrocarbon oil and, if necessary, the synthetic ester. However, from the viewpoints of dilution stability, detergency, degreasing property, and wastewater treatment property, the surfactant is contained in an amount of 3 to 80% by mass, preferably 5 to 80% by mass, based on the total amount of the lubricant stock solution for ironing. It is desirable to be. Examples of the surfactant used in the present invention include anionic, nonionic, and cationic surfactants. Examples of the anionic surfactant include fatty acid salts, petroleum sulfonates, alkylbenzene sulfonates, alkylnaphthalene sulfonates, alkyl sulfates,
Alkyl sulfosuccinates, alkyl diphenyl ether disulfonates, alkyl phosphates, polyoxyalkylene alkyl or alkyl allyl sulfates,
Naphthalenesulfonic acid formalin condensate, sulfated oil (such as funnel oil) and the like. Examples of the nonionic surfactant include polyoxyalkylene alkyl ether, polyoxyalkylene alkyl allyl ether, polyoxyalkylene sorbitan fatty acid ester, polyoxyalkylene sorbitol fatty acid ester, polyoxyalkylene fatty acid ester, polyoxyalkylene alkylamine, and alkyl alkanolamide. And the like. Examples of the cationic surfactant include an alkylamine salt, a quaternary ammonium salt, an alkyl betaine, and an amine oxide. Among these, in particular, from the viewpoint of excellent dilution stability, anionic and nonionic surfactants,
And mixtures thereof. In the present invention,
The water-soluble ironing lubricant stock solution composition may optionally contain various additives, for example, carboxylic acids, oils and fats, extreme pressure additives, various amines, alcohols, rust inhibitors, defoamers, and non-ferrous metal corrosion inhibitors. Agents, antioxidants, preservatives, sequestering agents, and the like. Representative examples of these include aliphatic carboxylic acids having 8 to 24 carbon atoms, such as monobasic acids or dibasic acids, and straight-chain or branched ones. However, it may be saturated or unsaturated. Specific examples of such carboxylic acids include, for example, saturated carboxylic acids such as caprylic acid, nonanoic acid, capric acid, lauric acid, palmitic acid, sebacic acid, and dodecane diacid, and oleic acid, linoleic acid, and linolenic acid. And unsaturated carboxylic acids such as acid and ricinoleic acid. As fats and oils, tallow, lard,
Rapeseed oil, soybean oil, coconut oil, palm oil, bran oil, hydrogenated products thereof, and the like. Extreme pressure additives include chlorinated paraffins, chlorinated fatty acids, sulfurized fatty oils, polysulfides, alkyl phosphate esters, and the like. Examples of various amines include alkanolamines and alkylamines, and alcohols having 1 carbon atom
0-18 linear or branched alcohols or various glycols. Examples of the rust preventive include aliphatic amides and aromatic carboxylic acids. Silicone compounds and the like as defoaming agents, benzotriazole compounds and the like as non-ferrous metal anticorrosives, phenolic antioxidants and the like as antioxidants, thiazole and isothiazole as preservatives, Examples of the phenol-based and halogen-based additives include ethylenediaminetetraacetate as the metal-sequestering agent.

The water-soluble ironing stock lubricant composition of the present invention may contain water. As the water used at this time, any water such as tap water, ion-exchanged water, and distilled water can be used. When water is added, the content is arbitrary, but it is usually 70% by mass or less, preferably 60% by mass or less, based on the total amount of the undiluted lubricant composition for ironing. In the present invention, the water-soluble ironing stock lubricant composition is diluted with water and used as an ironing lubricant, but the dilution ratio is not limited at all. However, in order to exhibit excellent processability, detergency, and degreasing property, the stock solution composition is 0.5 to 30 based on the total amount of the water-soluble ironing lubricant.
It is desirable to dilute with water so as to be 1% by mass, preferably 1 to 20% by mass. Here, as the water used for dilution, any water can be used, and specifically, for example, tap water, industrial water, ion-exchanged water, distilled water and the like can be used.

[0021] The water-soluble ironing stock lubricant composition of the present invention has a kinematic viscosity at 40 ° C of 5 to 70 mm.
Draw-forming using a ² / s water-insoluble drawing-forming lubricant, then ironing or re-drawing and ironing
It is a stock solution composition of a water-soluble ironing lubricant for use in manufacturing I cans. The upper limit of the kinematic viscosity at 40 ° C. of the water-insoluble draw forming lubricant is 70 mm ² /
s, preferably 50 mm ² / s, more preferably 40 m ² / s
m ² / s, the lower limit is 5 mm ² / s, preferably 7 mm ² / s
s, more preferably 10 mm ² / s.
If the kinematic viscosity at 40 ° C. exceeds 70 mm ² / s, the sticking of the cup, slip, wrinkles, ears and the like are caused, which is not preferable. On the other hand, if the kinematic viscosity at 40 ° C. is less than 5 mm ² / s, the workability becomes insufficient and the cup may be broken, which is not preferable.
Also, the draw-forming lubricant must be water-insoluble and substantially free of water. Here, the term "substantially free of water" means that it is not diluted with water at the time of use, does not contain water as a constituent component, and has a water content of 1% by mass or less based on the total amount of the lubricant due to moisture absorption or the like. It represents that. In the case of using a water-containing material such as an emulsion-type lubricant, plate-out properties and workability may be reduced when molding conditions are changed,
In order to cope with this, it is necessary to change the formulation of the lubricant, which undesirably lowers working efficiency.

In the present invention, any water-insoluble draw forming lubricant can be used as long as it falls within the above viscosity range. As the base oil, any of mineral oil, synthetic oil and fats and oils can be used. As an example of a mineral base oil that can be used as a draw forming lubricant, a lubricating oil fraction obtained by atmospheric distillation and vacuum distillation of crude oil is subjected to solvent removal, solvent extraction, hydrocracking, Mineral oils such as paraffinic or naphthenic oils obtained by appropriately combining one or more refining means such as solvent dewaxing, catalytic dewaxing, hydrorefining, sulfuric acid washing, and clay treatment are used. . Examples of the oil-based base oil include beef tallow, lard, soybean oil, rapeseed oil, rice bran oil, coconut oil, palm oil, palm kernel oil, and hydrogenated products thereof. Examples of the synthetic base oil include polyolefins (ethylene-propylene copolymer, polybutene, 1-octene oligomer, 1-decene oligomer, etc.) and hydrides thereof, alkylbenzenes, alkylnaphthalenes, esters, polyoxyalkylenes Glycols, polyphenyl ethers, dialkyl diphenyl ethers, phosphates (such as tricresyl phosphate), fluorinated compounds (such as perfluoropolyethers, fluorinated polyolefins), and silicone oils are exemplified. As the base oil of the draw forming lubricant, the above-described base oils may be used alone or in combination of two or more. Among the above-mentioned base oils for the draw forming lubricant, esters are preferably 5% by mass or more, preferably 10% by mass, based on the total amount of the lubricant, because of excellent workability.
It is desirable that the content be at least 20% by mass, more preferably at least 20% by mass.

Examples of the ester used as the base oil of the draw forming lubricant include those listed as the synthetic ester oil used in the water-soluble ironing stock lubricant composition. In addition, as the combination of the alcohol and the acid constituting the ester, any combination such as the above-described is possible, but as the base oil of the draw-forming lubricant, from the viewpoint of further improving workability, It is preferable to use one or more esters selected from and. Further, among them, one or two or more esters selected from and among them are more preferable, and one or two or more esters selected from among them are still more preferable. It is most preferable to use the above.

As the draw forming lubricant, a lubricant consisting of only the above-described base oil may be used, or a lubricant containing an appropriate additive in the base oil may be used. Such additives include oily agents, extreme pressure agents, corrosion inhibitors, detergents, dispersants, antioxidants, defoamers, and the like. Examples of the oily agent include fatty acids, higher alcohols, amines and amides. Examples of the extreme pressure agent include phosphorus compounds such as tricresyl phosphate, sulfur compounds such as sulfurized oils and fats, sulfur compounds such as polysulfide, chlorine compounds such as chlorinated paraffin, zinc dialkyldithiophosphate, molybdenum dialkyldithiophosphate, and zinc. Organic metal compounds such as dialkyldithiocarbamate and molybdenumdialkyldithiocarbamate are exemplified. Examples of the corrosion inhibitor include benzotriazole, mercaptobenzothiazole, sodium salt of mercaptobenzothiazole, and tolyltriazole. Examples of the detergent include alkali metal or alkaline earth metal sulfonate, alkali metal or alkaline earth metal salicylate, alkali metal or alkaline earth metal phenate, and fatty acid soap. Examples of the dispersant include alkenyl succinimides (including those modified with boric acid) and nonionic surfactants. Examples of the antioxidant include 2,6-di-tert-butyl-
Examples include phenol compounds such as p-cresol (DBPC) and aromatic amines such as phenyl-α-naphthylamine. Examples of the antifoaming agent include silicon compounds, higher alcohols, metal soaps, amides, ethylene-propylene copolymers and the like. It is desirable that the content of each of these additives is 5% by mass or less, preferably 1% by mass or less (all based on the total amount of the lubricant for drawing).

In the present invention, the metal to be processed is aluminum, an aluminum alloy (aluminum alloy).
Manganese alloy, etc.), steel sheet, surface-treated steel sheet (galvanized steel sheet, tin-plated steel sheet) and the like.

[0026]

The present invention will be described in more detail with reference to the following examples and comparative examples, but the present invention is not limited to these examples.

First, according to the compounding ratio shown in each column of Samples 1 to 5 of Table 1, the stock solution of the lubricant for ironing according to the present invention (Samples 1 to 4) and the stock solution of the lubricant for ironing were used for comparison. Each sample of the composition (Sample 5) was prepared.

[Table 1]

Next, each of the prepared samples and the following drawing lubricants (Samples 6 to 17) were mixed with each other in Example 1 in Table 2.
Using the combinations shown in each column of Comparative Examples 1 to 5 and Comparative Examples 1 to 5, DI cans having an inner volume of 350 ml were produced by the method shown below (DI can production method). Draw forming lubricant sample 6: Paraffinic mineral oil, @ 40 ° C 2 mm ² / s sample 7: Paraffinic mineral oil, @ 40 ° C 6 mm ² / s Sample 8: Paraffinic mineral oil, @ 40 ° C 23 mm ² / s
s sample 9: paraffinic mineral oil, @ 40 ° C 76 mm ² /
s Sample 10: neopentyl glycoldiolate, $ 40
° C 21 mm ² / s Sample 11: pentaerythritol tetraolate, # 4
0 ° C. 64 mm ² / s Mixture of samples 12: 6 and 10 (90:10, weight ratio),
＠ 40 ° C. 2.3 mm ² / s mixture of samples 13: 7 and 10 (90:10, weight ratio),
＠ 40 ° C. 6.7 mm ² / s Mixture of samples 14: 8 and 10 (90:10, weight ratio),
＠ 40 ° C. 22.8 mm ² / s Mixture of samples 15: 8 and 11 (45:55, weight ratio),
＠ 40 ° C. 39.1 mm ² / s A mixture of samples 16: 9 and 11 (90:10, weight ratio),
＠ 40 ° C. 74.7 mm ² / s Mixture of samples 17:10 and 11 (60:40, weight ratio), ＠ 40 ° C. 32.0 mm ² / s

DI Can Manufacturing Method Aluminum alloy plate having a diameter of 120 mm (JIS H
4000 3004-H19), after applying a drawing forming lubricant, drawing was performed under the following conditions so as to obtain a cup-shaped material having a diameter of 66 mm. Draw forming conditions Punch diameter: 66.00 mm Draw die diameter: 66.81 mm Wrinkle holding force: 1000 kgf The cup-shaped material obtained at the draw forming speed: 82 m / min is fitted into a punch, and the ironing stock lubricant composition is poured into water. Using a lubricant diluted to 3% by mass, ironing was performed under the following conditions. Ironing forming condition Punch diameter: 66.00 mm First ironing die diameter: 66.63 mm Second ironing die diameter: 66.43 mm Third ironing die diameter: 66.32 mm Fourth ironing die diameter: 66.24 mm Ironing speed: 82 m / Min

The DI cans thus produced were evaluated for drawability, ironability and washability.
Table 2 shows the evaluation results. In addition, each evaluation method is as follows. The appearance of the cup-shaped product obtained by the draw-forming property was visually observed. The evaluation was performed in the following two stages. ○: that there is no occurrence of wrinkles ×: observed whether breakage during Some ironing formability of ironing the occurrence of wrinkles, as well as the appearance of the openings and the wall surface of the resulting DI cans visually. The evaluation was performed by the following method. Of produced whether 10 cans of breaking, what fracture has not occurred ○, rupture was × those caused even one. The evaluation was made on a 6-point scale, with 5 having no black flaws in the opening and 0 being black flaws in the entire opening, and taking the average value of 10 cans produced. The DI cans obtained by the cleaning property were evaluated by spray cleaning using a cleaning solution in which the concentration of the surfactant was variously changed. Distilled water was further sprayed onto the DI can, and the presence or absence of the remaining lubricant was visually determined. In addition, in this evaluation method, when the lubricant remains on the can surface, the distilled water sprayed is repelled. The cleaning solution is Nippon Paint Co., Ltd.
An aqueous solution of Ridolin NHC100A manufactured by Nippon Paint Co., Ltd. (main component: surfactant) and an aqueous solution of Ridolin NHC100M manufactured by Nippon Paint Co., Ltd. (main component: surfactant) were used. Cleaning liquid 1: 100A: 3.8% by mass, 100M: 0.8% by mass, balance: water Cleaning solution 2: 100A: 3.8% by mass, 100M: 0.6% by mass, balance: water

[0031]

[Table 2]

As is evident from the results in Table 2, the water-soluble ironing lubricant stock composition according to the present invention was used for DI
When cans are manufactured, they are all excellent in draw-formability, ironability and washability. In particular, when an ester was added to the water-soluble ironing stock lubricant composition in addition to mineral oil and / or synthetic hydrocarbon oil (Examples 5 to 5).
13) shows that the occurrence of black spots after ironing is small. In addition, when an ester is used as the base oil of the drawing forming lubricant (Examples 9 to 13), it can be seen that occurrence of black spots after ironing is particularly small. On the other hand, it can be seen that when the ironing stock lubricant composition having a larger average particle size when diluted with water than specified in the present invention is used (Comparative Example 1), the cleaning property is inferior. . Further, when a draw forming lubricant having a viscosity lower than that specified in the present invention is used (Comparative Examples 2 and 4), it is assumed that the ironing-forming lubricant stock solution composition according to the present invention is used during ironing. Also, it can be seen that ironing formability is inferior. Further, when a draw forming lubricant having a higher viscosity than specified in the present invention is used (Comparative Examples 3 and 5), it is assumed that the ironing-forming lubricant stock solution composition according to the present invention is used in ironing. Also, it is found that draw formability and ironing formability are inferior.

[0033]

As described above, according to the present invention, it is possible to manufacture a high-quality DI can and to achieve an improvement in wastewater treatment.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideo Yokota 8 Chidori-cho, Naka-ku, Yokohama-shi, Kanagawa Prefecture Inside Nippon Oil & Oil Research Institute (72) Inventor Kazuhiko Endo 8 Chidori-cho, Naka-ku, Yokohama-shi, Kanagawa Nippon Oil & Oil Co., Ltd. (72) Inventor Kazuka Dai 8 Chidori-cho, Naka-ku, Yokohama-shi, Kanagawa Prefecture Nippon Oil & Oil Co., Ltd. No. 3-12 Nippon Stone Oil Co., Ltd.

Claims (2)

[Claims] A kinematic viscosity at 40 ° C. of 5 to 7 for a metal plate.
Used to produce DI cans by drawing using a water-insoluble ironing lubricant of 0 mm ² / s and then ironing or redrawing and ironing using a water-soluble ironing lubricant. A liquid concentrate composition of a water-soluble ironing lubricant for use, comprising a mineral oil and / or a synthetic hydrocarbon oil, and having an average particle diameter of 1 μm or less when diluted with water. An undiluted lubricant composition for molding. 2. The water-soluble ironing lubricant stock solution according to claim 1, which further comprises a synthetic ester oil together with the mineral oil and / or the synthetic hydrocarbon oil.