Spunbond non-woven fabric is a new type of textile fabric that combines the characteristics of textile and non-woven technology, with the softness of textiles and the uniformity of non-woven fabrics. It is widely used in various fields such as medical and health care, household goods, automotive interiors, packaging materials, industrial materials, agriculture, clothing, etc. The following is a detailed introduction to the spunbond non-woven fabric process:

Definition of spunbond nonwoven fabric

Spunbond non-woven fabric is a type of non-woven fabric that is formed by extruding and stretching polymers into continuous filaments, laying the filaments into a web, and then using self bonding, thermal bonding, chemical bonding, or mechanical reinforcement methods to turn the web into non-woven fabric.

Production process of spunbond nonwoven fabric

The production process of spunbond non-woven fabric mainly includes three steps: spinning, bonding, and finishing:

1. Spinning: The process of melting polymer and extruding it through a fine pore plate to form fibers. The key to this step is to choose the appropriate polymer and spinning equipment to ensure the quality and uniformity of the fibers. Common polymers include polypropylene, polyester, and polyethylene. Spinning equipment includes spinning, melt spinning, and wet spinning.

2. Bonding: The process of bonding fibers formed by spinning to each other through heating and pressure. The main bonding methods include hot rolling, needle punching, melt spraying, and chemical bonding. Among them, hot rolling is the most commonly used method, which combines fibers through heating and pressure to form a uniform piece of fabric. Acupuncture is the process of binding fibers together using a needle punching machine to increase the strength and stability of the fabric. Melt spraying and chemical bonding are the processes of bonding fibers together through melting or chemical methods.

3. Sorting: The process of shaping and post-processing the bonded fabric. Common sorting methods include embossing, printing, dyeing, and coating. Embossing can give fabrics different textures and textures, increasing their aesthetics and practicality. Printing and dyeing can add various patterns and colors to fabrics to meet different design needs. Coatings can enhance the waterproof, breathable, and wear-resistant properties of fabrics.

Production process of spunbond nonwoven fabric (taking polypropylene and polyester as examples)

1. Production process of polypropylene spunbond non-woven fabric:

Polymer (polypropylene+recycled material) is melted and extruded at high temperature through a large screw.

Through filters and metering pumps (quantitative delivery).

Enter the spinning process (stretching and suction up and down the spinning inlet).

After cooling, it is pulled onto the mesh curtain by airflow to form a net.

Pre reinforced by upper and lower pressure rollers.

Reinforce by hot rolling with a rolling mill.

After winding, rewinding, cutting, weighing and packaging, it is stored in the warehouse.

2. Production process of polyester spunbond non-woven fabric:

The processed polyester chips are melted and extruded at high temperature through large screw stalks.

Through filters and metering pumps (quantitative delivery).

Enter the spinning process (stretching and suction up and down the spinning inlet).

After cooling, it is pulled onto the mesh curtain by airflow to form a net.

Pre reinforced by upper and lower pressure rollers.

Reinforce by hot rolling with a rolling mill.

After winding, rewinding, cutting, weighing and packaging, it is stored in the warehouse.

Technological development of spunbond nonwoven fabric

The main technologies for spunbond nonwoven fabrics in the world include Leckfeld technology from Germany, STP technology from Italy, and Kobe Steel technology from Japan. The continuous advancement of these technologies has driven the development of the spunbond nonwoven industry and expanded its application areas.

The application prospects of spunbond nonwoven fabric

With the increasing demand of consumers for environmental protection, health, comfort, etc., the application fields of spunbond nonwoven fabrics will be further expanded. Especially in the fields of healthcare, hygiene, home furnishings, environmental protection, etc., the application of spunbond non-woven fabrics will be more extensive. For example, in the field of household goods, spunbond non-woven fabric can be used for bedding, curtains, tablecloths, etc; In the field of environmental protection, it can be used to make eco-friendly bags, garbage bags, etc.

In summary, spunbond nonwoven fabric has been widely used in multiple fields due to its unique production process and superior performance, and has shown strong growth momentum. In the future, with the continuous advancement of technology and the diversification of market demand, the application fields of spunbond nonwoven fabrics will be further expanded.