At present, SMMMS non-woven fabrics used for the production of sanitary materials and a package of materials are basically made of polypropylene (PP) at home and abroad. Therefore, it is very important to choose which pigment to use as the non-woven masterbatch. The spinning temperature of SMMMS non-woven fabric is between 220 °C and 250 °C, so the pigment should be resistant to high temperature, and the temperature resistance of the pigment should be higher than this temperature.

From the theory of dispersion of pigments, when pigments are processed to produce masterbatch, first of all, the pigments must be wetted first, and a series of complicated procedures such as surface coating treatment. Now, with pre-dispersed pigments, high-speed mixing machines are not required for high-speed mixing and wetting, and there are no flying objects such as dust, and only a simple mixer is needed.

The non-woven masterbatch of the non-woven fabric used for spunbonding and melt-blown has a large difference, and must be used in combination. However, due to the large difference in the denier of the spunbond and meltblown fabric in the nonwoven fabric, the general spunbond fabric is about 2 deniers, and the meltblown fabric is about 0.2 denier. The amount of masterbatch added is also different. Generally, the spunbond is between 0.5 and 2.0%, and the fineness of the meltblown fabric is less than 0.2 denier, and the amount of the masterbatch is between 3 and 8%.

Due to the high environmental requirements of sanitary materials and medical insurance materials, any toxic and hazardous substances in the products cannot exceed the standard. Finished nonwoven masterbatch must meet ROHS and FDA requirements.