Modified melamine-formaldehyde resin, a paper impregnated with a modified melamine-formaldehyde resin, a method for manufacturing a floor panel, and use of dicyandiamide as a modifier in a melamine-formaldehyde resin

A method for manufacturing a floor panel comprising a substrate and a top layer, said top layer defining an upper surface of said floor panel,

• wherein said floor panel is provided with embossments extending from said upper surface, such that a thickness of the floor panel varies along a cross-section of said floor panel, wherein said method comprises the steps of:
• a) providing said substrate;
• b) providing said top layer, said top layer comprising a modified melamine-formaldehyde resin comprising formaldehyde and melamine in a formaldehyde/melamine molar ratio within a range of from 1.60 to 1.80, and at least one modifier,
• wherein said at least one modifier is dicyandiamide, wherein an amount of dicyandiamide is within a range of from 30 to 40% by weight based on a total weight of melamine and dicyandiamide;
• c) composing a stack which comprises said substrate and said top layer;
• d) pressing said stack by means of a press plate, said press plate comprising embossing means and heating means,
• wherein said embossing means during pressing provide said floor panel with said embossments, and
• wherein said heating means during pressing causes said modified melamine-formaldehyde resin to harden and said top layer to adhere to said substrate.