Still possible to allocate such applications of polypropylene sheets, such as: formwork, elements of decorative design, Signs, plates, coasters, visors, swimming pools, etc. And separately I must say the wide application of pp sheets in the manufacture of stationery products: pencil cases, folders, files, notebooks, organizers, folders, envelopes, cases, as well as advertising and printed materials: posters, covers, business cards for better print quality polypropylene sheets are processed on both sides of a special corona, and a logo, a diverse symbols, commemorative and dedicatory inscriptions possibly using hot embossing, laser engraving, screen printing, etc. In carrying out construction works with polypropylene sheets, note that they special properties that distinguish them from conventional structural materials. Sheets of polypropylene can be cut, milled, planed, or expose them to the processing machines of the same or similar to those used for wood processing. Linking polypropylene sheets can be mechanically with rivets or bolts. It is necessary to bear in mind the propensity of the material to the linear expansion. Although such a connection is split, it is not has waterproof qualities, in some cases, it is still not strong enough, so is not very suitable for the connection of polypropylene parts. Inappropriate in certain situations is also considered connection with glue – bonding. Polypropylene has excellent chemical resistance, and therefore may be in contact with many soluble glues. The most profitable and reliable, and, consequently, the most frequently used method of connecting parts of polypropylene is welding. Currently, three known welding method. Highest quality – welding.