PP SMS spunmelt fabric is a nonwoven fabric made from polypropylene (PP) fibers through a process called the spunmelt process. Here are the general steps involved in the making process of PP SMS spunmelt fabric:

Polymer preparation

The first step is to prepare the PP polymer. The PP polymer is melted and extruded through a spinneret to form continuous filaments.

Spinning

The filaments are then drawn out and stretched to align the polymer molecules and improve the strength and durability of the fabric. This process is called spinning.

Web formation

The filaments are collected on a moving belt or drum, and a layer of fabric is formed. This layer is called a web.

Bonding

The web is then bonded together using heat, pressure, or a combination of both. This process is called thermal bonding or ultrasonic bonding. The bonding process creates a strong and durable nonwoven fabric.

Treatment

The nonwoven fabric may be treated with various chemicals or coatings to improve its properties, such as water repellency, flame retardancy, or anti-bacterial properties.

Converting

The nonwoven fabric is then cut and shaped into various forms, such as rolls, sheets, or bags, depending on the specific application and requirements.

The making process of PP SMS spunmelt fabric involves several steps, including polymer preparation, spinning, web formation, bonding, treatment, and converting. The spunmelt process results in a strong and durable nonwoven fabric that has a wide range of applications, including in the medical, hygiene, and industrial sectors.