If your trying to get it all off to bare wood, you might be making a big mistake. The finish absorbs into the wood and seals it. You will never get it all out without doing some damage to the wood itself. If you sand the wood down a little to get it all, you might sand through the top layer. Laminate, it actually just plywood, or plywood with a mahogany top layer, and you wont like what you find under the top layer I can guarantee that. Why are you wanting to sand it all out? To refinish it? paint it? In that case, you just want to sand enough through the finish for the new finish to adhere well..
if it were a solid wood, the magic is sanding down through the wood enough to get all the absorbed sealer out. Laminate, or plywood, you don't have enough of the good layer to do that safely...