What material is melt-blown PP?

May 13, 2023 | News

Melt-blown PP is polypropylene melt-blown special material, which is based on polypropylene as raw material, adding various additives, using the method of controlled rheology to improve the fluidity and molecular weight distribution of resin, the modified polypropylene melt mass flow rate can reach more than 1500, and low ash, long spinning cycle, comprehensive stable performance, suitable for melt-blown non-woven fabric forming process.

It is the main raw material for the production of polypropylene melt-blown non-woven products. Real melt-blown materials can be degraded, and the 2040 common on the market is just ordinary PP materials. Real PP melt-blown materials are all modified. The quality of the small machine itself is a big part of the reason. For regular melt-blown cloth, it is necessary to use 1500 melting finger special melt-blown material, add the tret master particle and the tret process to further improve the filtering efficiency.

The manufacture of masks cannot do without spunstick cloth and melt-blown cloth, both of which are high melting finger PP materials after degradation. The higher the melting index of PP used to make melt-blown cloth, the finer the fiber will be melted out, and the better the filter performance of the melt-blown cloth will be. And PP with low molecular weight and narrow molecular weight distribution is easier to make fiber with good uniformity.

The raw material for the production of mask S layer (spunbond cloth) is mainly high melting finger PP with melting index between 35 and 40, while the production of M layer (meltblown cloth) is meltblown grade PP with higher melting index (1500).

The production of these two kinds of high melting finger PP is inseparable from a key raw material is the organic peroxide depressant, due to the general PP melting index is generally low, poor liquidity in the melting state, limited its application in some fields, by adding organic peroxide to modify polypropylene, can improve the melting index of PP, reduce its molecular weight, Moreover, the molecular weight distribution of PP is narrowed, so that it has better fluidity and higher drawing rate. Therefore, PP modified by organic peroxide degradation can be widely used in the field of thin-wall injection molding and non-woven fabric.