SMMS (Spunbond-Meltblown-Meltblown-Spunbond) fabric and SMS (Spunbond-Meltblown-Spunbond) fabric are both nonwoven fabric types commonly used in various applications. The main difference between SMMS fabric making machines and SMS fabric making machines lies in the additional meltblown layer in SMMS, which provides improved filtration and liquid repellency properties. The specific requirements of the application will determine which fabric type and corresponding fabric making machine are suitable.

    Fabric Structure:
        SMS Fabric: An SMS fabric consists of three layers: a spunbond layer on the top and bottom, with a meltblown layer in the middle. This structure provides good barrier properties, fluid resistance, and filtration efficiency.
        SMMS Fabric: An SMMS fabric includes an additional meltblown layer compared to SMS. Therefore, the structure consists of two layers of meltblown sandwiched between two spunbond layers. This configuration enhances the fabric's filtration performance and liquid repellency.



    Machine Configuration:
        SMS Fabric Making Machine: A typical SMS fabric making machine involves three main processes: spunbond, meltblown, and composite formation. It consists of a spinning system for the spunbond layer, a meltblown system for the meltblown layer, and a bonding system to combine the layers.
        SMMS Fabric Making Machine: An SMMS fabric making machine follows a similar process to SMS machines but includes an additional meltblown system to create the extra meltblown layer. It incorporates two meltblown units to produce the SMMS fabric structure.



    Application:
        SMS Fabric: SMS fabric is widely used in medical and hygiene products, such as surgical gowns, masks, drapes, and diapers, due to its excellent barrier properties and breathability.
        SMMS Fabric: SMMS fabric offers enhanced performance compared to SMS and is commonly utilized in applications where higher filtration efficiency, liquid repellency, and bacterial barrier properties are required. It can be found in surgical drapes, sterilization wraps, protective apparel, and similar medical and hygiene products.