Product details from the website: "Table top: Particleboard, Ash Veneer... Paper foil" ... "Extension leaf: Particle- and fiberboard with honeycomb paper filling."
based on the description, this seems to be middle-to-lowest quality for them. I love IKEA, some of their stuff is fantastic for the price but you have to know what to look for (solid wood, for example). any surfaces using "foil" is their flimsiest quality. it's basically a micro thin veneer, almost like contact paper. it chips, peels, and wears through SO easily.
EDIT: I'm guessing from the description of that table that the top might actually ash veneer (some real wood veneers can be good), but that paper foil is possibly on the outer edges. that part of a table will get crashed into with chairs, etc, very often. if you still want this table, look at it in a showroom and see whether the sides have wood veneer, or the flimsy type.
Q