Difference between S spunbond nonwoven fabric and SS spunbond nonwoven fabric
Single layer spunbond nonwoven fabric(S) and Double spunbond nonwoven fabric(SS) are the two most popular nonwoven fabrics on the market, so S/SS spunbond nonwoven fabric making machines are also the most popular nonwoven machines all over the world.
The most significant difference between double-layer spunbond nonwoven fabric and single-layer spunbond nonwoven fabric is the production process. The single-layer spunbond nonwoven fabric is composed of a set of spinning system, it is only one time spinning. Double-layer spunbond nonwoven fabric is made by two spinning systems, which are spun twice, you can understand it as: SPUNBOND NONWOVEN + SPUNBOND NONWOVEN. Therefore, the double-layer spunbond non-woven fabric has the following advantages:
- SS nonwoven fabric has better strength/toughness, and the transverse tearing strength and longitudinal tearing strength better than S spunbond non-woven fabric.
- SS nonwoven surface uniformity is good, and it is softer. In some applications, it can replace single-layer spunbond nonwoven fabric. The single-layer spunbond nonwoven fabric is used in packaging/agriculture and other fields. But in medical healthcare and hygiene industries, double-layer nonwoven fabric SS can be used as the outer layer on baby diapers, because it has better air permeability, moisture absorption and heat preservation.
- SS non-woven fabrics have more application fields, SS spunbond nonwoven are more used in medical and health and other areas with better requirements, such as bed sheets, masks, diapers, etc., because it has excellent softness, skin affinity, water absorption. At the same time, SS nonwoven fabric in the field of packaging, also has the same function as single S nonwoven fabric, which can make nonwoven bags, laundry bags, suit dust bags, tablecloths, weeding cloth and so on.
Since double-layer non-woven equipment can produce S/SS two kinds of spunbond nonwoven fabrics, it is a multi-functional nonwoven fabric making machine, so the project cost is higher than that of single S spun.