RU-2026112171-A - ELECTRICAL STEEL SHEET WITH ADHESIVE SURFACE COATING AND LAMINATED CORE, AS WELL AS A METHOD OF THEIR MANUFACTURING

Inventors

• Такеда, Кадзутоси
• ФУКУТИ, Минако
• ТАКАТАНИ, Синсуке

Assignees

• НИППОН СТИЛ КОРПОРЕЙШН

Dates

Publication Date

20260505

Application Date

20240926

Priority Date

20230926

Claims (16)

1. 1. A sheet of electrical steel with an adhesive surface coating containing
2. electrical steel sheet;
3. an adhesive coating placed on at least a portion of one surface or both surfaces of an electrical steel sheet,
4. in this case the adhesive coating:
5. contains a cross-linkable thermoplastic resin A and a thermoplastic resin B different from the cross-linkable thermoplastic resin A, and
6. has a dynamic modulus of elasticity at room temperature of 130-200 GPa and a dynamic modulus of elasticity at 100°C of 100-200 GPa.
7. 2. An electrical steel sheet with an adhesive surface coating according to claim 1, wherein the cross-linkable thermoplastic resin A is one or more of a (meth)-acrylic resin and a polyester resin.
8. 3. An electrical steel sheet with an adhesive surface coating according to claim 1, wherein the weight ratio of the cross-linkable thermoplastic resin A to the thermoplastic resin B is 97/3-70/30.
9. 4. A sheet of electrical steel with an adhesive surface coating according to claim 1, in which the adhesive coating is cured.
10. 5. A laminated core in which a plurality of sheets of electrical steel with an adhesive surface coating according to any one of paragraphs 1-4 are laid in a pack, and the sheets of electrical steel are glued to each other by means of a cured film of the adhesive coating.
11. 6. A method for manufacturing a sheet of electrical steel with an adhesive surface coating according to any of paragraphs 1-4, wherein the method comprises the steps of:
12. forming a coating film by applying a coating liquid containing particles of a cross-linkable thermoplastic resin A and a thermoplastic resin B different from the cross-linkable thermoplastic resin A and having a weight ratio of the cross-linkable thermoplastic resin A to the thermoplastic resin B of 97/3-70/30 onto at least a portion of one surface or both surfaces of the electrical steel sheet;
13. The release liner is dried to form an adhesive coating.
14. 7. A method for manufacturing a laminated core according to paragraph 5, wherein the method comprises the steps of:
15. electrical steel sheets with an adhesive surface coating are laid, with the adhesive coating being placed between the electrical steel sheets to form a layered body;
16. cure the adhesive coating by heating and compressing the laminated body to form a cured film.