JP2850183B2 - Manufacturing method of non-delamination type lubricated plated steel sheet which can omit press oil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a household electric appliance which is used without removing a coating after being pressed without using a press oil.
The present invention relates to a method for producing a surface-treated steel sheet used for components such as building materials and automobiles.

[0002]

2. Description of the Related Art Conventionally, a part is manufactured by applying a press oil and removing the oil after press molding. However, there is a strong need for surface-treated steel sheets that have restrictions on the use of degreasing solvents, lubrication performance that can eliminate press oil for the purpose of cost reduction, and excellent coating surface properties (appearance, corrosion resistance, paint adhesion, etc.) after pressing. Has become. The present invention provides a revolutionary method for producing a lubricated plated steel sheet that can meet this need. As a public technique related to the present invention, there is Japanese Patent Application Laid-Open No. HEI 3-16726 "Lubricated resin-treated steel sheet excellent in formability". In this specification, the surface of a zinc-based or aluminum-based alloy-plated steel sheet is subjected to a chromate treatment with a Cr adhesion amount of 200 mg / m ² or less, and a resin coating of 0.3 to 3.0 g / m ² is applied thereon. The resin film is obtained by applying and baking a paint having a ratio of 100 parts by weight of a resin having a hydroxyl group and / or a carboxyl group, 10 to 80 parts by weight of silica, and 20 parts by weight of a polyolefin wax having an average particle size of 1 to 7 μm. It is stated.

However, the appearance and performance of a non-delaminated lubricating steel sheet after processing are important, and it is necessary to consider the uniformity of the thickness of the lubricating film, elongation, compression, and sliding wear. In particular, it is unsatisfactory from the viewpoint of high-speed continuous crank press workability and less deterioration of the coating after processing, and a lubricated steel plate that can operate stably can be obtained only by optimizing the coating composed of resin, silica and lubricant. Can be Further, the conventional technology does not solve various problems for production on a high-speed plating line.

[0004]

DISCLOSURE OF THE INVENTION The present invention provides lubricating performance excellent in high-speed deep drawing, overhanging, flange forming, and bending workability by a crank press, and has less deterioration of a coating film due to working and is versatile. It is intended to provide a method for producing a non-demolding type lubricated plated steel sheet which can be omitted from press oil and has excellent characteristics in a plating line. In particular, it is indispensable that lubricating steel plates can be produced at low cost as well as quality, and for that purpose, paints and coating techniques that can be produced on continuous plating lines are required. Many of the current plating lines do not have facilities for baking and painting organic solvent paints, and are premised on water-based resin paints that contain no organic solvents or are minimized in operation. In addition, high-speed and high-precision film thickness control is required, and paint properties and manufacturing conditions that can be manufactured in the rapid heating and cooling process are required.

[0005]

SUMMARY OF THE INVENTION The present invention advantageously solves the problems of the prior art. (1) The amount of Cr deposited on the surface of a plated steel sheet is 5 to 100 mg / day.
m ² of chromate treatment or coating weight 0.2~2.0g
/ M ² phosphate treatment to form a chemical conversion coating, and then the sum of the ether-ester type urethane resin (a) having a bisphenol type skeleton, ester skeleton and carboxyl group (a) and the epoxy resin (b) (a + b) Is an aqueous lubricating paint containing 50 to 85% by weight based on the total solid content, 3 to 30% by weight of polyolefin wax (c), and 10 to 40% by weight of silica (d) having a particle size of 3 to 30 nm. Is applied as 0.2 to 5 μm.
A method for producing a non-delamination type lubricated plated steel sheet which can be omitted from press oil, comprising baking at 0 to 200 ° C and forcibly cooling.

(2) The weight ratio of the polyether skeleton to the polyester skeleton of the ether / ester type urethane resin (a) is 10:90 to 70:30, and the acid value of the urethane resin is 10 to 50. (1) The method for producing a non-delaminated lubricated plated steel sheet according to (1), wherein the press oil can be omitted. (3) The epoxy resin (b) is a type having a glycol skeleton or a bisphenol type skeleton, wherein (b) is blended in a ratio that reacts with 20 to 100% by weight of the carboxyl group of (a). (1) The method for producing a non-delaminated lubricated plated steel sheet according to (1). (4) Polyolefin wax (c) has a melting point of 70-1.
(1) The method for producing a non-delamination type lubricated plated steel sheet according to (1), wherein the lubricated steel sheet has a particle diameter of 60 ° C and a particle diameter of 0.1 to 7.0 µm.

(5) The non-delaminated lubricated plated steel sheet without press oil according to (1), wherein the polyolefin wax (c) has an acid value of 30 or less or 0 and has a branched structure. Production method. (6) An increase in the amount of the acetylene glycol-alcohol type surfactant (e) in which the number of moles of the added ethylene oxide is 0 to 20 to 0.05 to 0.5% by weight based on the coating material, and a newtonia type having an ether and urethane skeleton Viscous agent (f)
(1) wherein a coating obtained by applying and baking an aqueous paint containing 0.01 to 0.2% by weight or both based on the solid content is provided. A method for manufacturing a stripped lubricated plated steel sheet.

[0008]

Operation and Examples The non-delaminated lubricated plated steel sheet of the present invention which can be omitted from press oil has a coating structure shown in FIG. That is, it has a coating structure comprising a plating coating (B), a conversion coating (C) of a chromate or phosphate coating, and a lubricating coating (D) on the thin steel plate (A). Each film can have a different configuration of the film thickness on both sides, one side, or both sides, and the composition of the film, depending on the application. The present invention is basically applicable to all thin steel sheets, ie, aluminum-killed steel sheets, ultra-low carbon steel sheets, and high-strength steel sheets.

An example of the manufacturing process of the present invention will be described below. The plating types are zinc, zinc alloy plating, and multi-layer plated steel sheets obtained by electroplating, hot-dip plating, and vapor phase plating, and aluminum, aluminum alloy plated, and multi-layer plated steel sheets. The amount of plating need not be particularly limited, and a commonly used plated steel sheet can be used.

A chemical conversion film is formed on the surface of the above-mentioned plated steel sheet (coil). As the conversion coating, a chromate coating or a phosphate coating is used. Chromate is electrolytically reduced using a plated steel sheet as a cathode in a bath containing anions such as chromic acid and sulfuric acid, and further inevitably or if necessary, containing a metal ion. Spray or immerse a washing type electrolytic chromate, chromate solution containing chromic acid, sulfuric acid, fluorine nitrate, etc. on the plating surface, then wash with water to form a coating containing trivalent chromium and hexavalent chromium hydrated oxide as main components A coating type chromate which coats a chromate film without applying an etching chromate and a chromate solution to be performed by an existing method, drying and washing with water can be adopted. The attached amount of chromate is 5 to 100 mg / m ² in terms of Cr. If it is less than 5 mg / m ² , corrosion resistance cannot be obtained, which is not preferable. 100mg /
If it exceeds m ² , the cohesive failure of the chromate itself is likely to occur, and the adhesion cannot be obtained. The chromate film is preferably a post-wash type chromate which is hardly dissolved in a water-based lubricating paint having a high trivalent chromium / hexavalent chromium ratio.

The phosphate film is subjected to a phosphate treatment for forming a phosphate such as zinc phosphate, iron, nickel, manganese or calcium selected from commercially available spray, dipping and coating types on the surface of the plated steel sheet. The amount of the phosphate coating to be applied is preferably in the range of 0.2 to 2.0 g / m ^{2 from} the viewpoint of corrosion resistance and adhesion. If it is less than 0.2 g / m ² , corrosion resistance cannot be obtained. If it exceeds 2.0 g / m ² , adhesion cannot be obtained by severe processing due to cohesive failure of the phosphate film.

The paint for a lubricating coating of the present invention will be described below. The paint of the present invention is mainly composed of a resin, a lubricant and silica. The resin used in the present invention is a water-dispersible ether / ester type urethane resin (a) having a molecular weight of 3,000 or more, having a bisphenol type skeleton and an ester skeleton and having a carboxyl group, and a water soluble or water having a glycol skeleton or a bisphenol skeleton. The dispersible epoxy resin (b) is replaced with a carboxyl group of (a)
It is composed of those which are blended at a ratio of reacting 100%.
Resin is extremely important for the film properties aimed at by the present invention.

That is, in order to satisfy high workability and chemical durability, it is important that the adhesion, the coating strength and the elongation are balanced. By blending a urethane resin and an epoxy resin having a higher molecular weight than a film obtained by crosslinking a low molecular weight resin, a film excellent in the above properties can be obtained. Urethane resin with high molecular weight contributes to the strength and ductility balance and abrasion resistance of the coating, and epoxy resin contributes to adhesion, coating strength, and chemical durability, and the combination of both provides excellent workability and corrosion resistance. A coated film is obtained. A resin having a large molecular weight is advantageous for further improving the balance between the strength and the ductility of the coating, and the balance between the hard segment and the soft segment and the crosslink density of the resin are important.

The polyester component of urethane is flexible,
The polyether has toughness and the weight ratio of the urethane resin polyether / polyester is from 10/90 to 70/3.
It is preferred to be in the range of 0. The compounding amount of the epoxy resin (b) is 20 to 20 of the carboxyl groups of the urethane resin (a).
Most preferred is a composition in which 100% is reacted. Examples of the polyether polyol having a urethane resin skeleton include polyols obtained by adding ethylene oxide and propylene oxide to low molecular weight glycols such as ethylene glycol, propylene glycol and bisphenol A, and polyoxytetramethylene glycol.
Among them, a polyether polyol having a bisphenol A skeleton gives good results.

Examples of the polyester polyol include a polyester obtained by a dehydration condensation reaction of a low molecular glycol and a dibasic acid, and a lactam polyol obtained by ring-opening polymerization of a lactam such as ε-caprolactam in the presence of a low molecular glycol. . As the isocyanate group for bonding the ester skeleton and the ether skeleton of the urethane resin, monomers such as tridiisocyanate and xylylene diisocyanate, monomers, dimers,
It is possible to use monomers and their reactants and mixtures with polyether polyols and polyester polyols. As for the compounding amount, the ratio to the molecular weight of the polyether polyol or polyester polyol to be used and the carboxyl group-introducing component described later is preferably 5 to 20% by weight of the urethane resin in terms of NCO because of excellent workability. The carboxyl group is a functional group for self-emulsification and is necessary for obtaining adhesion to the metal surface.

The carboxyl group-introducing component is a compound containing two or more hydroxyl groups or amino groups and one or more carboxyl groups, such as 2,2-dimethylolacetic acid, 2,2-dimethylolpropionic acid, Examples thereof include dihydroxycarboxylic acids such as 2-dimethylolpentanoic acid and diaminocarboxylic acids such as lysine and arginine. The carboxyl group compound is polymerized with an isocyanate compound in combination with the aforementioned polyether polyol or polyester polyol. According to this method, an ether / ester type urethane resin having a carboxyl group having a molecular weight of 3000 or more can be obtained. The amount of the carboxyl group is preferably from 10 to 50 as an acid value per urethane solid. When the acid value is less than 10, the adhesion of the obtained film is insufficient, and when the acid value is more than 50, water resistance and alkali resistance are undesirably lowered.

The urethane resin having a molecular weight of 3,000 or more is necessary in order to obtain a coating excellent in balance between strength and ductility and excellent in workability, corrosion resistance and the like by blending with an epoxy resin described later. A method of dispersing a urethane resin in water is to neutralize a carboxyl group with an alkali such as ammonia or an amine and self-emulsify, or emulsify using an emulsifier.

Hereinafter, the epoxy resin will be described. The workability and corrosion resistance cannot be obtained with the urethane resin alone, and an epoxy resin is used. As the epoxy resin, those having a reactive hydroxyl group or epoxy group can be used. In particular, a water-soluble epoxy such as a glycol skeleton or a water-dispersible epoxy resin having a bisphenol A skeleton is preferable. The compounding amount is desirably such that 20 to 100% or more of the carboxyl groups of the urethane resin react. If it is less than 20%, the effect of the epoxy added, that is, the chemical resistance and corrosion resistance are insufficient, and the adhesion is also affected. If it exceeds 100%, the properties of a free epoxy resin as a plasticizer appear and the workability is reduced, which is not preferable. The compounding amount is compounded according to the following formula. Epoxy solid content weight (g) = acid value of urethane resin × [(1
/ 56) / 1000] x epoxy equivalent x urethane resin compounding amount (g)

Hereinafter, the lubricant will be described. In the present invention, a lubricant is contained in order to obtain lubricity. Lubricants such as fluorine-based, hydrocarbon-based, fatty acid amide-based, ester-based, alcohol-based, metal soap, and inorganic lubricants can be used. Among them, polyolefin wax provides excellent lubricity, and among them, polyethylene having a spherical branch structure having a softening point of 70 to 160 ° C. and a particle size of 7.0 μm or less provides the best results. If the particle size is more than 7 μm, the coating becomes uneven, which is not preferable. When an oxidized polyethylene that does not require an emulsifier is used, a product having an acid value of 30 or less provides good results. The amount of the lubricant to be added depends on the purpose, but from the viewpoint of lubricating properties, in the case of polyethylene, 3 to 30% by weight is contained in the coating. If it is less than 3%, a practically low coefficient of friction cannot be obtained. On the other hand, if it exceeds 30%, workability and corrosion resistance are reduced. The most preferred concentration range is 5 to 20% by weight in the coating.

Hereinafter, silica will be described. Silica is contained in the coating in an amount of 10 to 40% by weight in order to improve the corrosion resistance and impart the strength and hardness of the coating. If it is less than 10%, the strength of the coating film is insufficient, and press debris tends to be generated by the press. In addition, the corrosion resistance, which is highly dependent on silica, is insufficient. 4
If it exceeds 0%, elongation of the coating film is reduced, and pressability and deep drawing performance are insufficient. The most preferred silica concentration range is 20
３０30% by weight. The silica preferably has a particle size of 3 to 30 nm. At 3 nm, the paint tends to gel. If it exceeds 30 nm, the friction coefficient increases and the pressability deteriorates. The silica used in the present invention may be a liquid phase silica sol produced by removing sodium by ion exchange method from water glass and a gas phase silica obtained by thermally differentiating silicon tetrachloride. Liquid phase silica sol in which a small number of particles are independently and uniformly dispersed is the most excellent.

As other additives, general surfactants, thickeners, coloring agents, defoamers, fungicides, dispersants, and the like can be added to the present invention. Particularly when a surfactant is added, the number of moles of the added ethylene oxide is 0 to
Newtonia type having an ether and urethane skeleton when adding an acetylene glycol / alcohol type surfactant (e) of 0.05 to 0.5% by weight based on the coating material and adding a thickener to adjust the viscosity during coating. Thickener (f)
The desired effect can be obtained by adding 0.01 to 0.2% by weight to the solid content.

The coating composition of the present invention composed of the compounds described above varies depending on the application and coating conditions, but is generally adjusted to a non-volatile content of 15 to 30%, a viscosity of 10 to 50 cps, and a surface tension of 80 dyne / cm or less. It is desirable.
The reason for this is to easily control the target film thickness and to obtain a uniform film thickness without uneven appearance or paint repellency. Existing coating methods such as roll coating, dipping, air knife squeezing, groove rolling, curtain coating, etc. can be used for coating, but the reverse roll is easy to obtain film thickness control, film thickness accuracy and uniform appearance. Coat application is most desirable. Immediately after applying 0.2 to 5 μm in dry film thickness, hot air, far-infrared furnace, electric furnace, combustion furnace, induction heating and plate temperature 80
After baking at 200 to 200 ° C, preferably 120 to 160 ° C, it is forcibly cooled by a method such as water cooling, dried and wound up.

The reason for limiting the range of the film thickness from 0.2 to 5 μm is that if the thickness is less than 0.2 μm, the lubricity, workability and corrosion resistance aimed at by the present invention are insufficient. If it exceeds 5 μm, welding cannot be performed, and problems such as blocking are likely to occur. The reason for limiting the baking sheet temperature is that if the temperature is lower than 80 ° C, the reflow and cross-linking reaction of the resin are insufficient, resulting in a film with many defects on the rough surface. If the temperature exceeds 200 ° C, the resin and the lubricant polyolefin are subject to thermal decomposition and thermal oxidation. Deteriorates. The most desirable uniform and smooth defect-free coating by melting and cross-linking of the resin and moderate surface thickening and dispersion of the lubricant in the coating are obtained in the range of 120 to 160 ° C.

Hereinafter, embodiments will be described. The evaluation was performed as follows unless otherwise specified. (1) Film thickness: Si in the film was measured by X-ray fluorescence and converted to a film thickness. (2) Coefficient of dynamic friction: A load of 100 is applied to a steel ball having a diameter of 10 mm.
g and move at 100mm / min to move in horizontal direction (F)
Was measured with a load cell, and expressed as dynamic friction coefficient (μ) = F / 100. (3) Coefficient of static friction: A commercially available weight of 200 g was placed and inclined at a rate of 0.5 degree / second, and the coefficient of static friction was measured from the angle at which it began to slide. (4) Deep drawing pressability: A high-speed crank press was performed with a rectangular cylinder (65 × 115 mm, molding height 50) at a die R of 5 mm and a cushion pressure of 4 tons, and the side surfaces were observed and scored. Rating
5: Good 4: Slight scratches 3: Debris adheres 2: Many gallings too much 1: Necking, cracking

(5) L bending: 90 degree bending was performed with a clearance of 5%, and the appearance was evaluated. 3 points with no press residue, 2 points with point-like residue on punch surface,
A point where a thread-like residue was generated was regarded as one point. (6) Adhesion: A 9 mm drawn convex surface was tape-peeled with Erichsen, and evaluated with peeling (x) and without (o). (7) Corrosion resistance: The test time (hour) at which 5% of white rust was generated in the salt spray test. (8) Chemical resistance: Gauze was wound around a terminal of 10 × 10 mm, immersed in xylene, slid 50 times with a load of 600 g, and evaluated from the appearance. Rating 3: Good 2: Whitening 1: Peeling (9) Spot weldability: Two lubricated steel plates were applied at 150 kg / cm ² using a CF type electrode having a diameter of 4.5 mm or a projection type electrode having a projection at the tip. It was evaluated by applying a current and pressing it to form a nugget (○) and not weldable (×).

[0026]

【Example】

Example 1 A cold rolled steel sheet having a thickness of 0.8 mm was electrogalvanized with a plating amount of 20 g / m ² using a sulfuric acid acidic zinc plating bath, and immediately in a solution of chromic acid / sulfuric acid = 50 / 0.5 g / l. To perform cathodic electrolysis (5 A / dm ² ) and water washing to form a chromate film. Subsequently, the prepared lubricating paint was applied with a reverse roll coater to a dry film thickness of 3 μm, heated to a sheet temperature of 130 ° C. in a heating step of a far-infrared furnace and a hot blast furnace, and then cooled with water to produce a lubricated steel sheet. As the lubricating paint, the resins, lubricants, silica sols, and thickeners shown in Table 1 were used.

[0027]

[Table 1]

FIG. 2 shows the amount of Cr attached to the chromate and the results of adhesion and pressability. The straight line in the figure is the adhesion (○, ×). The curve is the result of deep drawability. The curve is the result of corrosion resistance. Cr adhesion amount is 5-80mg
/ M ² , good adhesion and pressability were obtained. C
When the amount of r adhered was 100 mg / m ² , a decrease in performance was observed. Good performance is obtained when the corrosion resistance is 30 mg / m ² or more, and the corrosion resistance is reduced when the Cr adhesion amount is 10 mg / m ² . All samples exhibited good dynamic friction coefficients of 0.06-0.07. In addition, welding is possible by projection type resistance welding.

Example 2 A lubricated steel sheet was prepared using the lubricating paint shown in Table 1 on the plated steel sheet of Example 1 having a chromium deposition amount of 50 mg / m ^2, and the relationship between the dry film thickness and the pressability and weldability was shown. 2 is shown. Even with a film thickness of 0.2 μm, a low dynamic friction coefficient was obtained, and deep drawing without press cracking was possible. L-bending obtained excellent performance. With a film thickness of 1 or 2 μm or more, a small amount of galling was observed in the press, and good L-bend molding was possible. Film thickness 5
The μm material has excellent deep drawability, but is deteriorated by L-bending and welding. In particular, in the welding, the conductivity was reduced to the extent that the power was barely applied, and the weldability became unstable. In terms of corrosion resistance, excellent performance was obtained with a film thickness of 0.5 μm or more.

[0030]

[Table 2]

Example 3 A cold rolled steel sheet having a thickness of 0.8 mm was electrogalvanized with a plating amount of 20 g / m ² using a sulfuric acid acid zinc plating bath, and immediately sprayed with a commercially available etching chromate treatment solution, followed by washing with water. Then, a chromate treatment with a Cr adhesion amount of 50 mg / m ² was performed. Subsequently, the prepared lubricating paint was applied with a reverse roll coater to a dry film thickness of 3 μm, heated to a sheet temperature of 130 ° C. in a heating step of hot air and an electric furnace, and then cooled with water to produce a lubricated steel sheet. The resin, lubricant and silica sol shown in Table 3 were used as the lubricating paint.

FIG. 3 shows the results of the polyethylene content, the dynamic friction coefficient, the static friction coefficient, and the pressability. The curve in the figure is the dynamic friction coefficient. The curve is the result of the coefficient of static friction. The curve is the pressability rating result. , Indicates that the left axis is the right axis. The coefficient of friction decreases and the pressability also improves with the amount of polyethylene added. Especially 10-1
At 5%, excellent pressability was obtained. The coefficient of friction is different between static and dynamic, and is approximately low at 5% for dynamic friction, but stabilized at 10% for static. As for the pressability of the deep drawing, good pressability is obtained at 5%, and the most excellent is 10-15%. 30
In%, galling often occurs. In all the samples, salt spray corrosion resistance did not show white rust generation after 240 hours.

[0033]

[Table 3]

Example 4 Table 4 shows the results of tests using the plated steel sheet (Cr adhesion amount 40 mg / m ² ) of Table 1 and the resin and silica of the present invention while changing the type of lubricant. As a comparison, a lubricating resin composed of a commercially available acrylic resin and silica was manufactured under the same conditions. All four examples of the present invention exhibited excellent deep drawability and L-bendability. In the comparative acrylic resin system, cracks occurred in Teflon. In the comparative example using polyethylene as the comparative acrylic resin, the friction coefficient was low, but galling and press scum were easily generated, and the pressability was inferior to the urethane epoxy of the present invention. In particular, the comparative example containing Teflon had poor L-bendability.

[0035]

[Table 4]

Example 5 A urethane epoxy resin having a different silica content and a lubricating coating material of a lubricant shown in Table 5 were coated with Zn-plating amount of 20 g / m ² .
Ni alloy plated steel sheet (electrolytic chromate treatment Cr adhesion amount 5
0 mg / m ² ) with a thickness of 1 μm, and baked in a combustion furnace at a plate temperature of 150 ° C. to prepare a sample. FIG. 4 shows the results of deep drawing and L bending.

[0037]

[Table 5]

[0038]

As described above, according to the present invention, press working can be performed without using Freon and triethane, and it can be used as it is as a corrosion resistant coating. Further, since it does not contain an organic solvent, it can be produced on an existing plating line and has an extremely excellent industrial effect.

[Brief description of the drawings]

FIG. 1 is a view showing a coating structure of a non-delamination type lubricated plated steel sheet of the present invention in which press oil can be omitted;

FIG. 2 is a diagram showing the results of the amount of Cr attached to chromate and the results of adhesion and pressability.

FIG. 3 is a graph showing results of polyethylene content, dynamic friction coefficient, static friction coefficient, and pressability,

FIG. 4 is a diagram showing the relationship between the silica content and pressability.

[Explanation of symbols]

 A Thin steel sheet B Plating film C Chemical conversion film of chromate or phosphate film D Lubricating film

Continued on the front page (72) Inventor Kazuzo Shibata 1 Kimitsu, Kimitsu-shi, Chiba Nippon Steel Corporation Kimitsu Works (72) Inventor Yoshitaka Kimura 1 Kimitsu, Kimitsu-shi, Chiba Nippon Steel Corporation (56) References JP-A-5-51763 (JP, A) JP-A-5-65667 (JP, A) JP-A-61-60886 (JP, A) JP-A-3-39485 ( JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) C23C 22/00-22/86 B05D 3 / 02,3 / 10 B05D 3 / 10,5 / 08,7 / 14 B05D 7 / 24 301

Claims (6)

(57) [Claims] 1. The amount of deposited Cr on the surface of a plated steel sheet is 5-10.
0 mg / m ² chromate treatment or adhesion amount 0.2 to
A chemical conversion coating is formed by performing a phosphate treatment at 2.0 g / m ² , and then a total of an ether / ester type urethane resin (a) having a bisphenol type skeleton, an ester skeleton and a carboxyl group and an epoxy resin (b) (A +
b) is 50 to 85% by weight based on the total solid content, 3 to 30% by weight of polyolefin wax (c), and particle size is 3 to 30 n.
An aqueous lubricating coating containing 10 to 40% by weight of silica (d) is applied in a dry film thickness of 0.2 to 5 μm, baked to a final plate temperature of 80 to 200 ° C., and then forcibly cooled. Method for producing non-delaminated lubricated plated steel sheet which can be omitted press oil. 2. The weight ratio of the polyether skeleton to the polyester skeleton of the ether / ester type urethane resin (a) is 10:90 to 70:30, and the acid value of the urethane resin is 10 to 50. 2. The method for producing a non-delaminated lubricated plated steel sheet according to claim 1, wherein the non-delaminated press oil can be omitted. 3. An epoxy resin (b) having a glycol skeleton or a bisphenol type skeleton,
2. The method according to claim 1, wherein (b) is blended in a proportion that causes the carboxyl group of (a) to react with 20 to 100% by weight of the carboxyl group. 4. The non-delamination type lubricating plating according to claim 1, wherein the polyolefin wax (c) has a melting point of 70 to 160 ° C. and a particle size of 0.1 to 7.0 μm. Steel plate manufacturing method. 5. The non-delaminated lubricated plated steel sheet without press oil according to claim 1, wherein the polyolefin wax (c) has an acid value of 30 or less or 0 and has a branched structure. Production method. 6. When the number of moles of the added ethylene oxide is 0 to 6.
The acetylene glycol alcohol type surfactant (e) of 20 to 0.05 to 0.5% by weight based on the paint, and the Newtonia type thickener (f) having an ether and urethane skeleton of 0 to 0% based on the solid content. 2. A non-delamination type lubricated plated steel sheet according to claim 1, wherein a coating obtained by applying and baking an aqueous paint containing either or both of 0.1 to 0.2% by weight is provided. Manufacturing method.