KR19990074134A - How to make D-I CAN - Google Patents

Abstract

The DI can manufacturing method according to the present invention provides excellent pullability, ironing property and washability. DI can manufacturing method of the present invention 5-50mm at 40 ℃ on each surface of the metal plate²50-600 mg / m of drawing lubricant composition with dynamic viscosity of / s²Gravure roll was applied in an amount of; Drawing a metal plate to prepare a draw; The ironing lubricant raw material solution composition is ironed by a lubricating oil obtained by diluting the composition 10-200 times (weight) with water. The ironing lubricant raw material solution composition is an essential ingredient (A) C.₁₈Esters of trihydric alcohols with fatty acids, (B) at least one C_8-12 Monobasic and dibasic basic fatty acids, (C) at least one ricinolic acid condensate and C₁₈At least one amine selected from the group consisting of fatty acids, (D) monoethanolamine, diethanolamine, triethanolamine, monocyclohexylamine, dicyclohexylamine and tricyclohexylamine, and (E) water, respectively, to the total weight of the composition Relative to 10-20%, 1-10%, 5-30%, 5-25%, and 3-58% by weight.

Description

How to make D-I CAN

The present invention relates to a method for making a DI can. More specifically, the present invention relates to a method for manufacturing DI cans, such as steel cans and aluminum cans, comprising drawing and ironing a metal plate.

DI cans are manufactured by ironing after drawing (cupping) the metal plate. The DI can may consist of a body portion and a bottom portion integrated therewith without a seam. Drawing is a method involving forming a disc-cut plate into a bottomed cup with a tool comprising a combination of punch and die while pressing the disc-cut plate with a blank holding pad. Ironing is a method of operation that includes extending the sidewalls of the cup thus formed.

To date, emulsion type lubricants have been used for both drawing and ironing. Recently, the use of so-called solution type water soluble lubricating oils with less oil than lubricating oil and emulsion type lubricating oil or emulsion type lubricating oil in drawing has been studied.

The formed cans are greased and washed with an aqueous solution containing a surfactant (cleaning solution), and then the surface is formed, coated and printed to prevent corrosion, and the opening (necking) and edge curling (flange) are drawn before loading. . Therefore, the lubricating oil used for this purpose should exhibit excellent lubricating properties. In addition, the cans formed with lubricating oil must be thoroughly degreased and cleaned. Therefore, the discarded cleaning liquid must be completely disposed of. In particular, if lubricating oil is used that can be completely removed, the concentration of the surfactant in the cleaning liquid can be reduced. Thus, the treatability of the wastewater can be enhanced.

In such a situation, a method for producing a DI can using a non-aqueous lubricant and a solution-type water-soluble lubricant in draw and ironing, respectively, instead of the emulsion type lubricant mainly used is studied.

If an emulsion type lubricant is not used for drawing, it is necessary to control the amount of another lubricant applied to the aluminum or steel sheet to be formed to a predetermined range. If the applied amount of lubricating oil is exceeded, the aluminum or steel sheet cannot be transported by sliding on the plate feed roll provided for conveying the plate to the drawing device. In addition, if a large amount of oil remains in the formed product (cup), the bottom of the cup will stick to the cup transfer line, making it difficult to transfer the cup into the ironing machine and thus reduce the productivity of the can.

In addition, if the applied amount of lubricating oil is exceeded, the plate slides to the blank holding portion during drawing, thereby lowering the pressure. This causes the occurrence of wrinkles in the flange portion (opening) or partial elongation of the plate (ear). If wrinkles occur, the plate thickness at the flange portion is uneven. If the plate thickness is non-uniform, in subsequent ironing steps, sizing due to lack of lubrication in the thicker parts will result in thicker parts due to lack of smoothing, resulting in surface defects called so-called bleed-through. Let's do it. Nonuniformity in sheet thickness also causes cracking during the final forming stage, the necking stage. In addition, the cup in which the ear is produced can hardly be transferred to the ironing device because the ear is captured by the transfer line. This reduces the can's productivity.

On the contrary, if the applied amount of lubricating oil is too small, the pulling force of the metal plate is lowered, which causes problems such as breaking of the cup.

In order to achieve a DI can manufacturing method which provides excellent properties in many points by using a solution-type water-soluble lubricant in the ironing step instead of using an emulsion-type lubricant in the drawing step, an aluminum or steel sheet not formed to a predetermined range It is necessary to establish a technique for adjusting the amount of lubricant applied to the.

The present inventors have conducted extensive research on the solution to the above problems. As a result, the above problems include applying a draw with a predetermined amount of viscosity to a metal plate with gravure roll, drawing the metal plate and ironing the draw with ironing lubricant having a predetermined composition. It has been found that it can be solved by the manufacturing method. Thus, the present invention has been made.

The present invention is applied to each surface of the metal plate with a gravure roll in a draw lubricant composition having a flow viscosity of 5-50 mm2 / s at 40 ° C in an amount of 50-600 mg / ㎡ and after drawing the metal plate 10 Ironing with the lubricating oil obtained by diluting the ironing lubricant raw material solution composition by 200 times (by weight), the ironing lubricant raw material solution composition essentially comprising (A) an ester of a trihydric alcohol having a C ₁₈ fatty acid. (B) C _8-12 monobasic and / or dibasic fatty acids, (C) ricinolic acid condensates and / or C ₁₈ fatty acids, (D) monoethanolamine, diethanolamine, triethanolamine, monocyclohexylamine, At least one amine selected from the group consisting of dicyclohexylamine and tricyclo hexyl amine, and (E) water, based on the total weight of the composition, of 10-20%, 1-10%, 5-30%, 5 -25% by weight 3 provides a method for manufacturing DI cans containing a 58 wt% amount.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining lubricating oil application | coating using a gravure roll.

(Explanation of the sign)

1 metal plate, 2 metal plate feed roll, 3 oil pan, 4 doctor blade, 5 gravure roll, 6 application roll

The invention is explained in more detail below.

Examples of metals for use in the method for producing the DI can of the present invention include aluminum plates, aluminum alloy (eg aluminum-manganese alloy) plates, copper plates and surface treated steel sheets (eg galvanized steel sheets). , Tin-plated steel sheet).

In the process for producing a DI can according to the invention, the draw consists of a drawn lubricant composition having a flow viscosity of 5-50 mm 2 / s at 40 ° C.

The upper limit of the flow viscosity of the drawn lubricant composition at 40 ° C is required to be 50 mm 2 / s, preferably 45 mm 2 / s, more preferably 40 mm 2 / s. The lower limit of the flow viscosity of the above drawn lubricant composition at 40 ° C. is required to be 5 mm 2 / s, preferably 5.5 mm 2 / s, more preferably 6 mm 2 / s.

If the flow viscosity of the drawn lubricant composition exceeds 40 mm 2 / s at 40 ° C., stickiness, slippage, wrinkles, ear, etc. are undesirably generated. Conversely, if the flow viscosity of the drawn lubricating oil composition drops below 5 mm 2 / s at 40 ° C., undesirably lowers the drawability, possibly causing breakage of the cup. The drawing lubricant remaining on the surface of the cup formed by drawing contributes to the reduction of ironing between the tool (eg punch, dice) and the cup surface during ironing. However, if the viscosity of the drawn lubricating oil falls below 5 mm 2 / s, it will cause breaks during ironing or damage cans after ironing. This drawback significantly damages the can's appearance, degrading its commercial value.

The drawn lubricant composition does not need to be diluted with water before use as an emulsion type lubricant.

As the lubricating oil composition used in the present invention, any lubricating oil composition can be used as long as the viscosity is within the above range. As the base oil for the lubricating oil composition, any of mineral oil, synthetic oil, and fats and oils may be used.

Examples of mineral base oils which may constitute the drawn lubricating oil composition of the present invention include lubricating oil fractions obtained by distillation of natural oils at atmospheric or reduced pressure, such as solvent diaspalting, solvent extraction, hardenolesis, solvent dewaxing, catalysts. Paraffinic or naphthenic mineral oils obtained by treatment with one or a combination of two or more of purification methods such as dewaxing, hydrofining, sulfuric acid washing and clay treatment.

Examples of fat or oil bases that can be used herein include bovine oil, lard, soybean oil, rapeseed oil, rice bran oil, coconut oil, palm oil, palm seed oil and their hydrogenated products.

Examples of synthetic base oils that can be used herein include polyolefins (e.g., ethylene-propylene copolymers, polybutenes, 1-octene oligomers, 1-deken oligomers), hydrogenated products thereof, alkyl benzenes, alkyl naphthalenes, esters , Polyoxyalkylene glycols, polyphenyl ethers, dialkyl diphenyl ethers, phosphate esters (eg tricresyl phosphate), fluorine-containing compounds (eg perfluoropolyethers, fluorinated polyolefins), and silicones Contains oils.

As the base oil for the drawn lubricant composition of the present invention, the base oil may be used alone or in combination of two or more thereof.

Of the base oils for the drawn lubricating oil compositions of the present invention, the esters provide excellent drawability, so the proportion is at least 5% by weight, preferably at least 10% by weight, more preferably at least 20% by weight relative to the total weight of the composition. It is contained as.

As the alcohol constituting the ester, a monohydric or polyhydric alcohol may be used. As the acid constituting the ester, monobasic or polybasic acid may be used.

As the monohydric alcohol, usually C _1-24 , preferably C _1-12 , more preferably C _1-8 monohydric alcohols can be used. Such alcohols may be straight chain or branched. Specific examples of C _1-24 alcohols include methanol, ethanol, straight or branched propanol, straight or branched butanol, straight or branched propanol, straight or branched hexanol, straight or branched heptanol, straight or branched Octanol, straight or branched nonanol, straight or branched dodecanol, straight or branched undecanol, straight or branched dodecanol, straight or branched tridecanol, straight or branched tetradecanol, straight or branched Pentadecanol, straight or branched hexadecanol, straight or branched heptadecanol, straight or branched octadecanol, straight or branched nonanol, straight or branched ecosanol, straight or branched heneico Acidols, straight or branched triicosanols, straight or branched tetracosanols, and mixtures thereof.

As the polyhydric alcohol, divalent to 10 valent, preferably divalent to 8 valent alcohols can be used. Specific examples of dihydric to divalent alcohols include ethylene glycol, diethylene glycol, polyethylene glycol (trimer-pentadecamer of propylene glycol), 1, 3-propanediol, 1,2-butanediol, 1,3-butanediol , 1,4-butanediol, 2-methyl-1,2-propanediol, 2-methyl-1,3-propanediol, 1,2-pentanediol, 1,3-pentanediol, 1,4-pentanediol, Dihydric alcohols such as 1,5-pentanediol and neopentyl glycol; Glycerin, polyglycerols (dimer-octamers of glycerin such as diglycerin, triglycerine and tetraglycerine), trimethylolalkanes (eg trimethylolethane, trimethylolpropane, trimethylolbutane), dimer-octas thereof Mer, pentaerythritol, 1,2,4-butanetriol, 1,3,5-pentatriol, 1,2,6-hexanetriol, 1,2,3,4-butaneterol, sorbitol Polyhydric alcohols such as sorbitan, sorbitol-glycerin condensate, adonitol, arabitol, chrysitol and mantitol, xylose, aribinose, ribose, rhamnose, glucose, fructose, galactose, mannose, sorbose, Saccharides such as cellobiose, maltose, isomaltose, trehalose, sucrose and mixtures thereof.

Preferred of these polyhydric alcohols are ethylene glycol, diethylene glycol, polyethylene glycol (trimer-decamer of ethylene glycol), propylene glycol, dipropylene glycol, polypropylene glycol (trimer-decamer of ethylene glycol), 1,3-propane Diol, 2-methyl-1,2-propanediol, 2-methyl-1,3-propanediol, neopentylglycol, glycerin, diglycerin, triglycerine, trimethylolalkane (e.g. trimethylolethane, trimethylol Propane, trimethylolbutane), dimer-tetramers, pentaerythritol, dipentaerythritol, 1,2,4-butanetriol, 1,3,5-pentanetriol, 1,2,6-hexane Dihydric-8 valent alcohols such as triols, 1,2,3-butanetetrol, sorbitol, sorbitan, sorbitol-glycerine condensates, adonitol, arabitol, xylitol, mannitol and mixtures thereof. Particularly preferred among these polyatomic alcohols are ethylene glycol, propylene glycol, neopentyl glycol, glycerin trimethylolethane, trimethylolpropane, pentaerythritol, sorbitan and mixtures thereof.

As the _monovalent basic acid, usually C _6-24 fatty acid can be used. Such fatty acids may be straight or branched. Such fatty acids may also be saturated or unsaturated. Specific examples of C _6-24 fatty acids include straight or branched hexanoic acid, straight or branched heptanoic acid, straight or branched octanoic acid, straight or branched nonanoic acid, straight or branched decanoic acid, straight or branched undecylenate. Canonic acid, straight or branched dodecanoic acid, straight or branched tridecanoic acid, straight or branched tetradecanoic acid, straight or branched pentadecanoic acid, straight or branched hexadecanoic acid, straight or branched heptadecanoic acid , Straight or branched octadecanoic acid, straight or branched nonadecanoic acid, straight or branched isoic acid, straight or branched hehenic acid, straight or branched docoacid, straight or branched tricoacid, straight or branched Saturated fatty acids, such as type tetrakoic acid and unsaturated straight or branched hexanoic acid, straight or branched heptenoic acid, straight or branched octenic acid, straight chain or Branched nonenic acid, straight or branched decenic acid, straight or branched undecenic acid, straight or branched dodecenic acid, straight or branched tridecenic acid, straight or branched tetradecenic acid, straight or branched pentadecene Acid, straight or branched hexadecenic acid, straight or branched heptacetic acid, straight or branched octadecenic acid, straight or branched nonadecenic acid, straight or branched eicosenic acid, straight or branched eicosenic acid, Straight or branched docesenic acid, straight or branched tricosenic acid, straight or branched tetracosenic acid and mixtures thereof. Particularly preferred among these fatty acids are C _8-18 saturated or unsaturated fatty acids and mixtures thereof.

Examples of polybasic acids include C _2-10 divalent basic acids and trimellitic acid. C _2-10 divalent basic acid may be straight or branched. C _2-10 divalent basic acids may also be saturated or unsaturated. Specific examples of such dibasic base acids include ethanediacid, propanediacid, straight or branched butane diacid, straight or branched pentanediacid, straight or branched hexanediacid, straight or branched octanediacid, Straight or branched nonanediacids, straight or branched decandiacids, straight or branched butenediates, pentenediates, straight or branched hexeneacides, straight or branched octenedes, straight or branched nonenedi Acid, straight chain or branched desendiacids and mixtures thereof.

Combinations of alcohols and acids include any combination of the following:

(1) ester of monobasic basic acid and monohydric alcohol

(2) ester of monobasic basic acid and polyhydric alcohol

(3) esters of polybasic acids and monohydric alcohols

(4) esters of polybasic acids and monohydric polyhydric alcohols

(5) mixed esters of polyhydric acids with monohydric alcohols and polyhydric alcohol mixtures

(6) mixed esters of monohydric basic acids and polyhydric acids with polyhydric alcohols

(7) Mixed esters of monobasic basic and polyhydric acids with monohydric and polyhydric alcohol mixtures

The polyhydric alcohol used as the alcohol component may be a complete ester obtained by esterifying all the hydroxy groups therein or a partial ester having some unesterified hydroxy group, which is preferably a complete ester. The polybasic acid used as the acid component may be a complete ester obtained by esterifying all the carboxyl groups therein or a partial ester having some unesterified carboxyl group, which is preferably a complete ester.

As the base oil for the drawn lubricating oil composition of the present invention, the above esters (1) to (4), more preferably (1) to (3), even more preferably (1) -At least one ester selected from the group consisting of (2), most preferably (2), may preferably be used.

As the drawn lubricant component of the present invention, any one containing the base oil alone can be used. Optionally, a composition comprising a suitable additive introduced into the base oil can be used. Examples of additives that may be used herein include oils, extreme-pressure agents, corrosion inhibitors, detergent dispersants, antioxidants, and antifoams.

Examples of such oil preparations include fatty acids, higher alcohols, amines and amides.

Examples of prior maximum pressure agents include phosphorus compounds such as tricresyl phosphate, sulfur compounds such as sulfonated fats and oils and polysulfides, chlorine compounds such as chlorinated paraffins, zinc dialkyldithiophosphates, molybdenum dialkyls Organometallic compounds such as dithiophosphate, zinc dialkyldithiocarbamate and molybdenum dialkyldithiocarbamate.

Examples of such preservatives include benzotriazole, mercaptobenzothiazole, sodium salt of mercaptobenzothiazole and tolyltriazole.

Examples of the detergent dispersant include sulfonates of alkali metals, sulfonates of alkaline earth metals, salicylates of alkali metals, salicylates of alkaline earth metals, phenates of alkali metals, phenates of alkaline earth metals, fatty acid soaps and alkenylsuccinic acids. Imides (including their boric acid denaturation products), nonionic surfactants.

Examples of the antioxidants include phenolic compounds such as 2,6-di-tert-butyl-p-cresol (DBPC) and aromatic amines such as phenyl-α-naphthylamine.

Examples of such antifoaming agents include silicone compounds, higher alcohols, metallic soaps, amides and ethylene-propylene copolymers.

The amount of such additives introduced into the drawn lubricant composition is usually at least 20% by weight, preferably at least 15% by weight, relative to the total weight of the drawn lubricant composition, respectively.

In the method of manufacturing the DI can of the present invention, the above-described drawing lubricant composition is applied to various surfaces of the metal plate by gravure roll in an amount of 50-600 mg / m 2 before drawing.

As used herein, the term "gravure roll" refers to a roll obtained by plating a cylindrical steel pipe with copper and chrome and electronically sculpting the steel pipe to achieve an upper unity (cell). The use of such gravure rolls makes it easy to control the amount of oil applied by only changing the size and number of screen cells and cells.

In the present invention, the drawn lubricant composition needs to be applied to various surfaces of the metal plate with the gravure roll in an amount of 50-600 mg / m 2, preferably 100-500 mg / m 2, more preferably 150-450 mg / m 2. have. If the applied amount of the lubricating oil composition exceeds 600 mg / m 2, undesirably it causes sticking of the cup and slipping, wrinkling and earing of the metal plate. On the contrary, if the applied amount of the lubricating oil composition is 50 mg / m 2 or less, the drawability of the metal plate is undesirably reduced.

In the present invention, the conditions under which the lubricating composition is applied to the metal plate are not particularly limited as long as gravure roll is used. In practice, however, application rolls, lubricant feeders, doctor blades and the like can be used in place of gravure rolls. The application roll is a roll comprising an elastic material having a cylindrical steel pipe and a hardness of 50-90 stitches. It is preferable that the elastic material has resistance to the water-insoluble lubricant composition.

The method shown in FIG. 1 is preferable as a method for applying lubricating oil.

(1) supplying the drawing lubricant on the gravure roll (5) from the oil pan (3);

(2) stripping excess lubricant out of the surface of the gravure roll with a doctor blade (4) so that the lubricant remains only in the cells of the gravure roll;

(3) transferring lubricating oil in the gravure roll cell to the application roll 6; And

(4) Transferring lubricating oil from the application roll to the various surfaces of the metal plate (1) conveyed by the metal plate conveying roll (2)

In the method for making the DI can of the present invention, the resulting draw is then ironed. Ironing takes place immediately or after redrawing.

In the process for preparing DI of the present invention, ironing is an essential ingredient (A) ester of C ₁₈ fatty acid and _trihydric alcohol, (B) C _{8-12 monovalent} base and / or divalent fatty acid, (C) lysine Ironing lubricant raw material comprising nolactic acid condensate and / or at least one amine selected from the group consisting of C ₁₈ fatty acids, (D) monoethanolamine, diethanolamine, triethanolamine, monocyclohexylamine and (E) water The solution composition consists of a lubricating oil obtained by diluting 10-200 times with water.

Specific examples of the trihydric alcohol in component (A) include glycerin, trimethylolethane, trimethylolpropane and tremethylolbutane. Specific examples of C ₁₈ fatty acids in component (A) include stearic acid, oleic acid and ricinoleic acid.

The ester as component (A) may be a complete ester obtained by esterifying all the hydroxy groups in the trihydric alcohol or a partial ester with some unesterified hydroxy groups, but preferably from good degreasing and washability reference points Is a complete ester of.

The upper limit of the content of component (A) is 20% by weight, preferably 18% by weight relative to the total weight of the ironing lubricant raw material solution composition. The lower limit of the content of component (A) is 10% by weight, preferably 12% by weight relative to the total weight of the ironing lubricant raw material solution composition. If the content of component (A) exceeds 20% by weight, the resulting ironing lubricant will be an emulsion and thus degrease and detergency. Conversely, if the content of component (A) is 10% by weight or less, the resulting ironing lubricant will adversely degrade the ironing properties.

The C _8-12 divalent basic acid in component (B) may be straight chain or branched. In addition, the C _8-12 dibasic acid in component (B) may be saturated or unsaturated. Specific examples of C _8-12 divalent basic acids include straight chain or branched octane diacids, straight chain or branched nonanediacids, straight chain or branched dekindiacids, straight chain or branched undecanediacids, straight chain or branched dodes Candiacids, straight or branched octenedisides, straight or branched nonenedisides, straight or branched decandiacids, straight or branched undecenediates, straight or branched dodecendic acids and mixtures thereof.

The C _{8-12 monovalent} basic acid in component (B) may be linear or branched. In addition, the C _{8-12 monovalent} basic acid may be saturated or unsaturated. Specific examples of C _{8-12 monovalent} basic acid include straight chain or branched octanoic acid, straight chain or branched nonanoic acid, straight chain or branched decanoic acid, straight chain or branched undecanoic acid, straight chain or branched dodecanoic acid, Straight or branched octenic acid, straight or branched nonenic acid, straight or branched decenic acid, straight or undecenic acid, straight or branched dodecenic acid and mixtures thereof.

As component (B), monovalent basic acid and divalent basic acid may be used alone or in combination. Mixtures of monobasic and dibasic basic acids are used from the baseline of excellent ironing and rust resistance properties.

The upper limit of the content of component (B) is 10% by weight, preferably 6% by weight, more preferably 5% by weight relative to the total weight of the ironing lubricant raw material solution composition. The lower limit of the content of component (B) is 1% by weight, preferably 2% by weight, more preferably 2.5% by weight, based on the total weight of the ironing lubricant raw material solution composition. Even if the content of component (B) exceeds 10% by weight, it does not affect the effect of the lubricant. This is economically undesirable. On the contrary, when the content of component (B) falls below 1% by weight, the final lubricating oil is in the form of an emulsion that exhibits reduced ironing and rust resistance and degreases and degreases them.

The ricinolic acid condensate in component (C) is obtained by dihydro condensation of ricinolic acid. In general, the degree of condensation of ricinolic acid condensate is indicated by acid value. The ricinolic acid used in component (C) usually has an acid value of 40-150 mg · KOH / g, preferably 50-130 mg · KOH / g.

Specific examples of C ₁₈ fatty acids in component (C) include stearic acid, oleic acid, ricinolic acid and mixtures thereof.

As component (C), ricinolic acid condensates or C ₁₈ fatty acids may be used alone. Mixtures of lysinelic acid condensates with C ₁₈ fatty acids are preferably used from the point of reference of good ironing and antifoaming properties.

The upper limit of the component (C) content is 30% by weight, preferably 28% by weight, based on the total weight of the ironing lubricant raw material solution composition.

The lower limit of the content of component (C) is 5% by weight, preferably 15% by weight, more preferably 16% by weight relative to the total weight of the ironing lubricant raw material solution composition. The content of component (C) in excess of 30% by weight does not increase the effect of the lubricant. On the contrary, if the content of component (C) falls below 5% by weight, the ironing property is undesirably deteriorated.

Component (D) is at least one amine selected from the group consisting of monoethanolamine, diethanolamine, triethanolamine, monohexylamine, dicyclohexylamine and tricyclohexylamine. The upper limit of the content of component (D) is 25% by weight, preferably 23% by weight, based on the total weight of the ironing lubricant raw material solution composition. The lower limit of the content of component (D) is 5% by weight, preferably 10% by weight based on the total weight of the ironing lubricant raw material solution composition.

If the content of component (D) exceeds 25% by weight or falls below 5% by weight, the stability of the final lubricating oil is reduced, resulting in an emulsion that degreases and washes when diluted with water.

Component (D) is at least one selected from the group consisting of the above compounds but component (D) comprises a combination of the following components (D) and (D ₂ ) to exhibit enhanced stability and better corrosion resistance when diluted with water It is preferable.

(D1) at least one of the group consisting of monoethanolamine, diethanolamine and triethanolamine.

(D2) at least one of the group consisting of monohexylamine, dicyclohexylamine and tricyclohexylamine.

The upper limit of the content of component (D1) used in combination with component (D2) is 15% by weight, preferably 14% by weight, based on the total weight of the ironing lubricant raw material solution composition. The lower limit of the content of component (D1) is 10% by weight, preferably 11% by weight, based on the total weight of the ironing lubricant raw material solution composition.

If the content of component (D1) exceeds 15% by weight or less than 10% by weight can not be expected to enhance the effect.

The upper limit of the component (D2) content used in combination with component (D1) is 10% by weight, preferably 9% by weight, based on the total weight of the ironing lubricant raw material solution composition. The lower limit of the content of component (D2) is 5% by weight, preferably 6% by weight relative to the total weight of the ironing lubricant raw material solution composition.

If the content of component (D2) is more than 10% by weight or less than 5% by weight, no enhanced effect can be expected. The content of component (D2) is preferably at least 5% by weight in order to enhance the corrosion protection properties of the lubricating oil.

As water used as component (E), tap water, industrial water, ion-exchange water, distilled water, etc. can be used. The water can be hard or soft.

The upper limit of component (E) is 58 weight% with respect to the total weight of an ironing lubricant raw material solution composition, Preferably it is 40 weight%. The lower limit of component (E) is 3 weight% with respect to the total weight of an ironing lubricant raw material solution composition, Preferably it is 10 weight%. If the content of component (E) exceeds 58% by weight, the content of the effective component is reduced. It becomes necessary to use at high concentration and becomes complicated to handle. It is also added so that a minimum amount of lubricant is supplied in one application. On the contrary, when the content of component (E) is 3% by weight or less, the final lubricant is too viscous to handle.

The lubricant raw material solution composition having the above composition may be diluted with water in order to manufacture the ironing lubricant used in the method for producing a DI can according to the present invention. In this way, excellent ironing lubricants such as abrasive powder dispersibility, filterability, corrosion resistance, ironing property, grease removal property, cleaning property, liquid stability, antifoaming property, and abrasion resistance can be obtained. If necessary, the lubricating oil raw material solution composition may include a conventionally introduced additive.

Specific examples of additives include antioxidants such as sulphate, phosphoric acid, phosphate and boron compounds, phenolic inhibitors, amine antioxidants, sulfur antioxidants, phosphorus inhibitors and chlorine antioxidants, nitrogen compounds (e.g. For example, benzotriazoles) and corrosion inhibitors such as sulfur and nitrogen containing compounds, phenolic preservatives, formaldehyde providing compounds and corrosion inhibitors such as salicylate compounds, antifoam agents such as silicone oils, fatty acids, esters and alcohols Oil preparations such as, anionic surfactants such as sulfuric acid and sulfuric acid esters, and nonionic surfactants such as polyoxyethylene compounds. These additives may be used alone or in combination of two or more. The content of these additives is 5% by weight or less, preferably 1% by weight or less, based on the total weight of the ironing lubricant raw material solution composition.

In the method for producing a DI can according to the present invention, the ironing is composed of a lubricating oil obtained by diluting the ironing lubricating oil raw material composition having the above composition with water 10-200 times, preferably 20-100 times (by weight). Any water may be used as the diluent. In detail, the above-mentioned component (E) can be used.

The ironing lubricant used herein can be obtained by diluting the ironing lubricant raw material composition described above with water. Ironing lubricants have an effect when water, components (A), (B), (C), (D) and optionally other additives are included as a base in a predetermined amount and proportion.

Thus, it may be included in the ironing lubricant raw material solution composition in which some water is stored. Before use, the ironing lubricant raw material composition may be appropriately diluted with water to have a predetermined composition.

The invention is further illustrated in the following examples, which should not be construed as limiting the invention thereto.

The general lubricating oil composition and the non-drawing lubricating oil composition according to the present invention, used in the following examples, are described below.

Drawing lubricant

Sample 1: paraffinic mineral oil, @ 40 ° C., 2 mm ² / s

Sample 2: paraffinic mineral oil, @ 40 ° C., 6 mm ² / s

Sample 3: paraffinic mineral oil, @ 40 ° C., 23 mm ² / s

Sample 4: paraffinic mineral oil, @ 40 ° C., 76 mm ² / s

Sample 5: neopentyl glycol dioleate @ 40 ° C., 21 mm ² / s

Sample 6: pentaerythritol tetraoleate @ 40 ° C., 64 mm ² / s

Sample 7: 90:10 (weight) mixture of Sample 1 and Sample 5, @ 40 ° C., 2.3 mm ² / s

Sample 8: 90:10 (weight) mixture of Sample 2 and Sample 5, @ 40 ° C., 6.7 mm ² / s

Sample 9: 90:10 (weight) mixture of Sample 3 and Sample 5, @ 40 ° C., 22.8 mm ² / s

Sample 10: 45:55 (weight) mixture of Sample 3 and Sample 6, @ 40 ° C., 39.1 mm ² / s

Sample 11: 90:10 (weight) mixture of Sample 4 and Sample 6, @ 40 ° C., 74.7 mm ² / s

Sample 12: 60:40 (weight) mixture of Sample 5 and Sample 6, @ 40 ° C., 32.0 mm ² / s

Sample 13: 45% by weight of sample 3, 45% by weight of sample 6, 7.3% by weight of oleic acid and 2.7% by weight of diethanolamine, @ 40 ° C., 39.1 mm ² / s

The ironing lubricant raw material solution composition (sample 14) and the comparative ironing lubricant raw material solution composition (sample 15) according to the present invention were prepared according to the composition shown in Table 1 below.

Sample 14 Sample 15 % Composition (% by weight) (A) Oleic acid triester of trimethylolpropane (B) Octanoic acid (C) Ricinolic acid condensate ^{* 1} Oleic acid (D1) Diethanolamine (D2) Dicyclohexylamine (E ) Water Others: Petroleum sulfonate polyoxyethylene nonyl phenyl ether ^{* 2} benzotriazole 18 5 12 9 11 8 33 1.8 3 0.2 30 5 12 9 11 8 21 1.8 2 0.2 * 1: acid value: 50mgKOH / g * 2 degree of polymerization of polyoxyethylene: 6

Example 1

As shown in Table 2, using a drawing lubricant composition (sample 2) and an ironing lubricant raw material composition (sample 14), a 350 ml DI can was prepared by the following method:

How to make DI cans

(1) A lubricating lubricating composition was supplied by gravure roll in an oil pan.

(2) The overlubricating composition on the surface of the gravure roll was wiped off with a doctor blade so that the lubricating composition remained only in the cells of the gravure roll.

(3) The lubricating composition precipitated in the cell on the gravure roll was transferred to the coating roll.

(4) The lubricating composition on the application roll was transferred onto various surfaces of the aluminum alloy plate (JIS H 4000 3004-H19). The coating amount of the lubricating composition is shown in Table 2.

(5) In the aluminum alloy plate obtained in step (4), a diameter of 160 mm was cut into a cup-type press machine (drawing machine) in the same disk shape. The disc was immediately drawn into a cup-shaped product with a diameter of 90 mm.

(6) The cup-shaped product was transferred to a main body manufacturing machine (can maker) and redrawn into a cup-shaped product having a diameter of 66 mm. The cup-type product was ironed with the lubricant obtained by diluting the ironing lubricant raw material solution composition to provide a cup-type product having a diameter of 66 mm and a height of 130 mm.

Example 2-7

In the same manner as in Example 1 using a combination of the draw lubricating composition and the ironing lubricant raw material composition in Table 2 to prepare a DI can having an internal volume of 350ml.

Comparative Example 1-5

As shown in Table 2, a DI can having an internal volume of 350 ml was prepared in the same manner as in Example 1, using the above-described drawing lubricant composition and the ironing lubricant raw material composition.

Comparative Example 6

Drawing lubricant (sample 9) was applied to an aluminum alloy plate on a conventional rubber roll instead of the gravure rolls used in steps (1)-(4) above. A DI can having a 250 ml internal volume was prepared in the same manner as in Example 1 using the ironing lubricant raw material solution composition (sample 14).

The DI candles thus obtained were evaluated by the following method. The results are shown in Table 2.

Pullability:

Visually confirm the external appearance of the cap-shaped product obtained in step (5).

Observed. Evaluation was made according to the following criteria:

(Circle): A wrinkle is not observed.

X: Wrinkles were observed.

Ironing property:

In the ironing step (6), the breakage of the product was visually observed.

In addition, the opening and the wall surface of the DI can obtained in step (6)

Observed.

Evaluation was made according to the following criteria.

Breaking:

Ten cans were evaluated.

(Circle): No fracture is observed.

X: Breakage was observed.

Opening:

A score of 5 indicates that no liquid passage occurred. Score ○

Indicates that liquid passage occurs over the entire surface of the opening. Therefore, six stages of evaluation were made. The measured values of 10 DI cans were averaged.

Wall surface:

○: No scratch was observed.

X: Scratch was observed.

Cleanability:

The DI can obtained in step (6) was spray-washed with a grease remover having a different concentration of surfactant as a washing solution, washed with water and then examined for the presence of water repellency on the surface. If the concentration of the surfactant is lower than required, lubricating oil remains on the surface of the DI can causing water repellency. This is what affects subsequent formation steps. In other words, the lower the concentration of surfactant that repels water, the better the washability and grease removal of the DI can.

In this evaluation method, the iron-sulphate sulfate-based grease remover commonly used in the decanting step of the DI can was used as a washing solution. Evaluation was carried out according to the following three steps:

If the concentration of surfactant in a conventional degreaser is 100,

(Circle): Water repulsion occurs when surfactant concentration is 0-33.

(Triangle | delta): Water repellency arises when the density | concentration of surfactant is 34-66.

X: Water repellency occurs when the concentration of the surfactant is 67-99.

Example number Drawing lubricant Coating amount (mg / m ² ) Friction Lubricant Raw Material Solution Pullability Fracture Aperture Wall Surface Detergency Example 1 Sample 2 373 Sample 14 ○ ○ 4.1 ○ ○ Example 2 Sample 3 348 Sample 14 ○ ○ 4.1 ○ ○ Example 3 Sample 8 398 Sample 14 ○ ○ 4.7 ○ ○ Example 4 Sample 9 370 Sample 14 ○ ○ 4.9 ○ ○ Example 5 Sample 10 368 Sample 14 ○ ○ 4.6 ○ ○ Example 6 Sample 12 378 Sample 14 ○ ○ 4.9 ○ ○ Example 7 Sample 13 382 Sample 14 ○ ○ 4.6 ○ ○ Comparative Example 1 Sample 1 423 Sample 14 ○ × 2.1 × ○ Comparative Example 2 Sample 4 403 Sample 14 × ○ 1.8 × ○ Comparative Example 3 Sample 7 342 Sample 14 ○ × 2.9 × ○ Comparative Example 4 Sample 11 375 Sample 14 × ○ 2.2 × ○ Comparative Example 5 Sample 9 380 Sample 15 ○ ○ 4.8 ○ × Comparative Example 6 Sample 9 813 Sample 14 × ○ 3.1 × △

The results described in Table 2 show that the manufacturing method of the present invention can produce DI cans having excellent pullability, ironing property and washability. In particular, Examples 3-7, in which esters were used as base oils for the lubricating oil composition, show that liquid passage occurs extremely rarely in the opening after ironing.

On the other hand, when a lubricating oil composition having a viscosity lower than that defined here is used (Comparative Examples 1 and 3), fracture occurs during ironing, liquid passage occurs at many points of the opening, and scratches occur on the wall surface. .

In addition, when a lubricating oil composition having a viscosity higher than that defined herein is used (Comparative Examples 2 and 4), wrinkling occurs during drawing, liquid passage occurs at many points of the opening, and scratches occur on the wall surface.

In addition, the final washability deteriorates when the ironing lubricant obtained by diluting the ironing lubricant raw material composition having a higher content of component (A) than defined herein is used (Comparative Example 5).

In addition, when the lubricating oil composition is applied to a metal plate with a conventional rubber roll (Comparative Example 6), the amount of lubricating oil applied is increased to cause wrinkles during drawing, breakage occurs during ironing, and liquid passage occurs at many points of the opening. And scratches on the wall surface and deterioration of washability.

As described above, the manufacturing method of the DI can according to the present invention provides excellent drawing property, ironing property and washing property. When the ester is used as the base oil of the drawn lubricating oil composition, fluid passage in the opening after ironing is extremely rare.

Although the present invention has been described in detail with reference to specific embodiments, it will be apparent to those skilled in the art that many changes and modifications can be made without departing from the spirit and scope of the invention.

Claims (3)

On each surface of the metal plate, a lubricating lubricant composition having a dynamic viscosity of 5-50 mm ² / s at 40 ° C. was applied with gravure roll in an amount of 50-600 mg / m ² ; Drawing a metal plate to prepare a draw; In the manufacturing method of the DI can which includes ironing the said draw material with the lubricating oil obtained by diluting the ironing lubricating oil raw material composition 10-200 times (weight) with water, Ironing lubricant raw material solution composition is essential ingredient (A) C₁₈ Esters of trihydric alcohols with fatty acids, (B) at least one C_8-12Monobasic and dibasic basic fatty acids, (C) at least one ricinolic acid condensate and C₁₈At least one amine selected from the group consisting of fatty acids, (D) monoethanolamine, diethanolamine, triethanolamine, monocyclohexylamine, dicyclohexylamine, and tricyclohexyl amine, and (E) water, respectively, to the total weight of the composition DI can manufacturing method comprising the amount of 10-20% by weight, 1-10% by weight, 5-30% by weight, 5-25% by weight and 3-58% by weight. The method of claim 1 wherein the draw lubricant composition contains an ester in an amount of at least 5% by weight. The method according to claim 1, wherein component (D) (D1) at least one selected from the group consisting of monoethanolamine, diethanolamine and triethanolamine; And (D2) at least one selected from the group consisting of monohexylamine, dicyclohexylamine and tricyclohexylamine.