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Differences between spunbonded, melt blown, and SMS nonwoven fabrics

2023-03-21  407

What is spunbonded nonwoven fabric?

Spunbonded nonwoven fabrics are made by continuous spinning of fibers. The polymer is extruded and stretched to form filaments. These filaments are laid in a net. Then, during thermal, chemical, or mechanical processing, the web itself adheres. Through reinforcement, the net becomes a non-woven fabric. Applications of spunbonded nonwoven fabrics include nonwoven bags, linings, health work clothes, masks, and filters. It is becoming increasingly popular in the health and medical industries.

The raw materials for producing anti adhesive nonwoven fabrics include PP (polypropylene), Pet (polyester), nylon, and PE (polyethylene). The most commonly used is PP, which has stability, heat resistance, aging resistance, and breathability.


What is melt blown nonwoven fabric?

The process of melt blowing is to convert polymer fragments into mesh fabrics. Commonly used raw materials are PP and PE. After being squeezed, filtered, and pumped, hot air blows the fibers from the melt blown mold to form a more dense, tangled web of fibers. This simple processing method gives it a significant cost advantage over other systems.


What is SMS non-woven fabric?

SMS nonwoven fabric is a three-layer structure composed of spunbonded, melt blown, and spunbonded. It has the same structure as a sandwich. The top layer is a spunbonded nonwoven fabric. The intermediate layer is melt blown. Then the bottom layer is spunbonded.


Differences between spunbonded, melt blown, and SMS nonwoven fabrics

Differences in production processes

The production process of spunbonded nonwoven fabrics is very simple. All procedures are completed on the non woven fabric production line. The steps are as follows:

Fill the raw material PP into the silo and add the necessary additives.

The extruder dissolves and extrudes the material.

The filter removes impurities from the PP solution.

The rotating system begins to operate. It rotates and stretches the PP solution into long, thin fibers.

Form a web of filaments. The nets are then produced into non-woven fabrics by their own methods (adhesive, thermal adhesive, chemical adhesive, or mechanical reinforcement).


The manufacturing process of melt blown is shorter than that of spunbonded:

The raw material PP automatically completes steps 1 to 3.

PP is transformed into a melt by extrusion.

The melt is filtered and metered by a pump before flowing into the spinning box.

In the spinning box, the spinning mold ejects the fibers. Hot, high-pressure air blows the fibers into thin, long fibers.

Melt blown nonwoven fabrics are produced by roll forming and hot rolling.


SMS nonwoven fabrics can be produced by both spunbonded and melt blown methods. The spunbonded method and the melt blown method work independently in front of the rolling mill. Then, they are integrated into a three-layer fiber, known as SMS nonwoven fabric.


characteristic

The spunbonded nonwoven fabric has the characteristics of moisture resistance, breathability, flexibility, light weight, and non combustion. At the same time, they are non-toxic, non irritating, environmentally friendly, and recyclable. And it has rich colors and low prices.

The weight of melt blown nonwoven fabric is very light, three fifths of that of cotton. It feels soft and comfortable. Melt blown fabrics are waterproof, breathable, and non absorbent. Melt blown cloth has good filtering performance, which is required for medical masks.

SMS nonwoven fabrics have great advantages in water repellency. Spunbonded nonwoven fabrics have durability and strength characteristics under wet or dry conditions, are resistant to wear and tear, and absorb almost no moisture. The inner layer of meltblown fabric gives a soft touch and is waterproof.


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