There is no solvent that will "dissolve polypropylene". Nor polyethylene. It's like trying to dissolve wax. They melt with heat, not dissolve in solvents.
There is no conventional solvent that can dissolve polypropene! But you can try hot nonpolar solvent such as the hot xylene. You need heat it to 130DEG C.
Veellu kaadu.
Polypropylene is a polyolefin. It does not dissolve in any solvent. If you have some specific problem, please post details or send a message for suggestions.