Abstract: The present disclosure relates to a bonding composition for an electrical steel sheet, and a steel sheet and a laminate to which same is applied, the bonding composition comprising polyurethane formed by reacting a diisocyanate monomer and a polyol, wherein the diisocyanate monomer can comprise an aromatic diisocyanate monomer and an aliphatic diisocyanate monomer.

Abstract: The present invention relates to: an electrical steel sheet including: an electrical steel sheet; and a bonding coating layer positioned on the electrical steel sheet, and further including: a first interface layer positioned in the electrical steel sheet and brought into contact with the bonding coating layer; and a second interface layer positioned in the bonding coating layer and brought into contact with the first interface layer, in which 70 mol % or more of total Si content in the bonding coating layer including the second interface layer is present in the second interface layer.

Abstract: An exemplary embodiment of the present invention provides: an adhesive coating composition enabling adherence (coupling) of an electrical steel sheet without using conventional coupling methods such as welding, clamping, and interlocking; an electrical steel sheet laminate to which the same is applied; and a method for manufacturing the same. An adhesive coating composition for an electrical steel sheet, according to an exemplary embodiment of the present invention, includes, on the basis of 100 wt % of total solids: 15 to 70 wt % of a first composition containing an organic resin and an organic/inorganic composite in which inorganic nanoparticles are substituted for an organic resin; 20 to 80 wt % of a second composition containing a metal phosphate and phosphoric acid; and 1 to 10 wt % of a coupling agent. The coupling agent may contain one or more of a silane-based coupling agent, a titanate-based coupling agent, and an aluminate-based coupling agent.

Abstract: The present invention relates to an electrical steel sheet laminate, and provided is an electrical steel sheet laminate comprising: a plurality of electrical steel sheets; and polymer adhesive layers positioned between the electrical steel sheets, wherein the coating thickness of the polymer adhesive layers is 1.8-5.4 ?m, the space factor of the laminate is 95.8-98.5%, and the following mathematical formula 1 is satisfied. [Mathematical Formula 1] 172.4?space factor (%)×thickness (?m)?531. 172.

Abstract: The present disclosure relates to a method for manufacturing an electrical steel sheet laminate, the method comprising the steps of: preparing an electrical steel sheet strip including an adhesive layer; coating the strip with a fusion accelerator including a silane coupling agent, a curing agent, and a solvent; fabricating metal parts from the strip; and laminating the metal parts and attaching same to each other by compression.

Abstract: The present disclosure relates to a bonding composition for an electrical steel sheet, and a steel sheet and a laminate employing same, wherein the bonding composition for an electrical steel sheet may comprise an adhesive resin and a bonding additive, the adhesive resin may be polyurethane, and the bonding additive may comprise a coupling agent including an amino silane.

Abstract: An embodiment of the present invention provides an electrical steel sheet laminate, including: a plurality of electrical steel sheets; and a fusion layer disposed between the electrical steel sheets, wherein the fusion layer includes an olefin-based semi-crystalline polymer and at least one inorganic metal compound of a metal phosphate and a metal chromate.

Abstract: An embodiment of the present invention provides: an adhesive coating composition capable of attaching (coupling) an electrical steel sheet without using an existing coupling method, such as welding, clamping, or interlocking; an electrical steel sheet laminate employing the same; and a manufacturing method therefor. The adhesive coating composition according to an embodiment of the present invention comprises: 40-95 wt % of a first component comprising an organic/inorganic composite in which inorganic nanoparticles are substituted in a water-soluble resin; 1-50 wt % of a second component comprising a composite metal phosphate; and 1-10 wt % of an additive.

Abstract: An electrical steel sheet adhesive coating composition according to an exemplary embodiment of the present invention includes, based on 100 wt % of the total solids: a resin at 20 to 40 wt % and having an average particle diameter of 10 to 300 nm; an inorganic nanoparticle at 10 to 35 wt % bonded with the resin; a metal phosphoric acid salt at 10 to 30 wt %; and phosphoric acid at 10 to 40 wt %. An electrical steel sheet product according to an exemplary embodiment of the present invention includes a plurality of electrical steel sheets; and an adhesive layer disposed between the plurality of electrical steel sheets, wherein the adhesive layer includes a metal of one or more kinds among Al, Mg, Ca, Co, Zn, Zr, and Fe at 0.5 to 30 wt %, N at 0.1 to 10 wt %, C at 0.1 to 5 wt %, P at 1 to 30 wt %, a metal of one or more kinds among Si and Ti at 10 to 30 wt %, and a balance of O.

Abstract: An adhesive coating composition according to an embodiment of the present invention comprises polyethylene acrylate including a repeating unit represented by chemical formula 1 below and a repeating unit represented by chemical formula 2 below, wherein the polyethylene acrylate includes 65-90 wt % of the repeating unit represented by chemical formula 1 below and 10-35 wt % of the repeating unit represented by chemical formula 2 below.

Abstract: An adhesive coating composition according to one embodiment of the present invention comprises 100 parts by weight of polyethylene acrylate including a repeating unit represented by a following formula (1) and a repeating unit represented by a following formula (2), and 3 to 25 parts by weight of inorganic particles, wherein the polyethylene acrylate contains 75 to 95% by weight of the repeating unit represented by the following formula (1), and 5 to 25% by weight of the repeating unit represented by the following formula (2).

Abstract: The present invention has been made in an effort to provide an adhesive coating composition capable of adhering (fastening) a non-oriented electrical steel sheet without using a conventional fastening method such as welding, clamping, or interlocking, a non-oriented electrical steel sheet stack to which the same is applied, and a manufacturing method thereof. According to an exemplary embodiment of the present invention, an adhesive coating composition includes: 40 to 99 wt % of a first component containing a water-soluble resin; and 1 to 60 wt % of a second component containing a composite metal phosphate.

Abstract: An embodiment of the present invention provides an electrical steel sheet including: an upper adhesive layer positioned on an upper surface of an electrical steel sheet; and an lower adhesive layer positioned on a lower surface of the electrical steel sheet, wherein the upper adhesive layer has a pencil hardness of F or lower, and the lower adhesive layer has a pencil hardness of H or higher.

Abstract: An embodiment of the present invention provides an electrical steel sheet laminate, including: a plurality of electrical steel sheets; and a fusion layer disposed between the electrical steel sheets, wherein the fusion layer includes an olefin-based semi-crystalline polymer and at least one inorganic metal compound of a metal phosphate and a metal chromate.

Abstract: A method for manufacturing an electrical steel sheet product according to an exemplary embodiment of the present invention includes: preparing an adhesive coating composition; forming an adhesive coating layer by applying and then curing the adhesive coating composition onto a surface of an electrical steel sheet; forming a heat-fused layer by laminating and heat-fusing a plurality of electrical steel sheets on which the adhesive coating layers are formed; and cooling the heat-fused electrical steel sheets at a cooling rate of 0.05 to 20° C./min.

Abstract: An exemplary embodiment of the present invention provides: an adhesive coating composition enabling adherence (coupling) of an electrical steel sheet without using conventional coupling methods such as welding, clamping, and interlocking; an electrical steel sheet laminate to which the same is applied; and a method for manufacturing the same. An adhesive coating composition for an electrical steel sheet, according to an exemplary embodiment of the present invention, includes, on the basis of 100 wt % of total solids: 15 to 70 wt % of a first composition containing an organic resin and an organic/inorganic composite in which inorganic nanoparticles are substituted for an organic resin; 20 to 80 wt % of a second composition containing a metal phosphate and phosphoric acid; and 1 to 10 wt % of a coupling agent. The coupling agent may contain one or more of a silane-based coupling agent, a titanate-based coupling agent, and an aluminate-based coupling agent.

Abstract: An electrical steel sheet adhesive coating composition according to an exemplary embodiment of the present invention includes, based on 100 wt % of the total solids: a resin at 20 to 40 wt % and having an average particle diameter of 10 to 300 nm; an inorganic nanoparticle at 10 to 35 wt % bonded with the resin; a metal phosphoric acid salt at 10 to 30 wt %; and phosphoric acid at 10 to 40 wt %. An electrical steel sheet product according to an exemplary embodiment of the present invention includes a plurality of electrical steel sheets; and an adhesive layer disposed between the plurality of electrical steel sheets, wherein the adhesive layer includes a metal of one or more kinds among Al, Mg, Ca, Co, Zn, Zr, and Fe at 0.5 to 30 wt %, N at 0.1 to 10 wt %, C at 0.1 to 5 wt %, P at 1 to 30 wt %, a metal of one or more kinds among Si and Ti at 10 to 30 wt %, and a balance of O.

Abstract: An embodiment of the present invention provides: an adhesive coating composition capable of attaching (coupling) an electrical steel sheet without using an existing coupling method, such as welding, clamping, or interlocking; an electrical steel sheet laminate employing the same; and a manufacturing method therefor. The adhesive coating composition according to an embodiment of the present invention comprises: 40-95 wt % of a first component comprising an organic/inorganic composite in which inorganic nanoparticles are substituted in a water-soluble resin; 1-50 wt % of a second component comprising a composite metal phosphate; and 1-10 wt % of an additive.

Abstract: The present invention has been made in an effort to provide an adhesive coating composition capable of adhering (fastening) a non-oriented electrical steel sheet without using a conventional fastening method such as welding, clamping, or interlocking, a non-oriented electrical steel sheet stack to which the same is applied, and a manufacturing method thereof. According to an exemplary embodiment of the present invention, an adhesive coating composition includes: 40 to 99 wt % of a first component containing a water-soluble resin; and 1 to 60 wt % of a second component containing a composite metal phosphate.

Abstract: A platelet-type zirconium phosphate, which has a P—OH group contained in a structure thereof, and has a crystalline peak at a 2? value of 11.6±2 degrees and no crystalline peak at a 2? value of less than 11.6±2 degrees in X-ray diffraction analysis, is provided. The platelet-type zirconium phosphate has a platelet-type structure and can be uniformly dispersed at a nanoscale level in a coating film to exhibit excellent surface gloss and barrier capability. Also, the platelet-type zirconium phosphate can exhibit excellent corrosion resistance due to the presence of the P—OH group on a surface thereof, and can be dispersed not only in an aqueous solution but also in an organic solvent.