In the non-woven fabric, S, SS, SMS, SMMS mean the following

S: spunbonded non-woven fabric = hot-rolled single-layer web;

SS: spunbonded nonwoven fabric + spunbonded nonwoven fabric = hot rolled from two layers of web;

SMS: spunbond non-woven fabric + meltblown non-woven fabric + spunbond non-woven fabric = three-layer fiber mesh hot rolled;

SMMS: spunbonded nonwoven fabric + meltblown nonwoven fabric + meltblown nonwoven fabric + spunbonded nonwoven fabric = four-layer fiber mesh hot rolled.

Non-woven fabric, also known as non-woven fabric, is made of oriented or random fibers. It is a new generation of environmentally friendly materials. It is moisture-proof, breathable, flexible, light, non-combustible, easy to decompose, non-toxic and non-irritating, rich in color, and price. Low cost, recyclable and so on. For example, polypropylene (pp material) pellets are used as raw materials, which are produced by high-temperature melting, spinning, paving, and hot-rolling and continuous one-step process. It is called cloth because it has the appearance and some properties of the cloth.