What are the inspection items of polypropylene (PP) meltblown materials on raw materials

　　What are the inspection items of polypropylene (PP) meltblown materials on raw materials?

　　Compared with spunbonded non-woven fabrics, melt-blown non-woven fabrics have a finer fiber structure, so they have better ability to capture minute particles. Meltblown non-woven fabrics use polypropylene with good processing properties and excellent drug resistance as raw materials, so they have higher porosity, more specific surface area, better filtration efficiency, and excellent insulation properties. Melt-blown non-woven fabrics are used as medical and sanitary fabrics, mainly used to manufacture medical protective clothing, surgical gowns, medical masks, diapers, disinfection wraps, sanitary napkins and other products.

　　1. Meltblown non-woven fabric raw material testing-polypropylene

　　1. According to the standard:

　　GB/T 30923-2014 Plastic Polypropylene (PP) Meltblown Special Material

　　2. Testing items:

　　(1) Technical requirements Test items: particle appearance, melt mass flow rate, ash content, volatile matter, and tert-butyl peroxide, molecular weight distribution

　　(2) Sanitary indicator detection: total number of bacterial colonies, total number of fungal colonies, coliforms, pathogenic pyogenic bacteria