The structure of the PP melt blown machine is that the outer layer fiber is thick, the inner layer fiber is thin, the outer layer is loose, and the inner layer is tightly tapered to gradually tighten the structure. The unique gradient deep filtration forms a three-dimensional filter residue effect, featuring high porosity, high rejection, large dirt holding capacity, large flow rate and low pressure drop.
The melt-blown process of PP melt-blown machine is one kind of polymer extrusion non-woven process. In theory, all thermoplastic (high-temperature melting, low-temperature curing) polymer chip materials can be used in the production process of melt-blown filter. Polypropylene is one of the most used slicing materials in the meltblown process. In addition, the polymer slicing materials commonly used in the melt-blown process are polyester, polyamide, polyethylene, polytetrafluoroethylene, polystyrene, PBT, EMA, EVA, and the like.
The olefin polymer raw material (such as polypropylene) has a high degree of polymerization, so that the heating temperature is higher than the melting point of 100 ° C to be melted at a higher temperature, and the polyester heating temperature is slightly higher than the melting point of the melt blowing. Olefinic feedstocks generally do not require drying. The structural characteristics of the PP meltblipping machine are that the fiber fineness is relatively small, usually less than 10 microns, and most of the fiber fineness is between 1 and 4 microns.