SS stands for Spunbond + Spunbond, double-layer spunbond polypropylene nonwoven fabric. Two layers of spunbond fibers are laminated by hot rolling. The fabric features clear fiber texture, soft touch, good air permeability and favorable cost performance.

Structurally, SS only consists of two spunbond layers without a melt-blown barrier layer. It is flexible and tensile-resistant, yet its original liquid barrier property is limited. Therefore, pure SS is rarely used as the main material for surgical drapes.

Double SS, marked on our surgical pack list, is made by laminating two pieces of SS fabric again via hot pressing. It achieves much higher thickness, tear resistance and wear resistance, and it is the most common reinforcing material for general & C-section surgical drapes.

The incision area keeps contacting surgical instruments, blood and irrigation fluid, where the fabric is vulnerable to abrasion. Attaching Double SS reinforced patch on the operation zone effectively strengthens the fabric and reduces risks of tearing and liquid leakage.

Many buyers mix up SS and SMS. SMS adopts a three-layer structure: Spunbond-Meltblown-Spunbond. The middle melt-blown layer provides excellent liquid barrier performance, so SMS is widely used as the main material for drapes and reinforced surgical gowns. SS features softness and wear resistance, mainly applied to local reinforcing patches, hand towels, leggings and dressing liners. They cannot be substituted arbitrarily.