How does the hot-rolled spunbond process improve the thickness uniformity and stability of polyester hot rolled non-woven fabric?

1. The basic principle of hot-rolled spunbond process
The hot-rolled spunbond process is a process that uses heat energy and pressure to pull polyester fibers into a mesh structure through spinning technology and roll them at high temperature to achieve hot melt bonding between fibers. The biggest feature of this process is that the polyester fibers in the fiber web are tightly bonded through high temperature hot pressing to form a non-woven fabric with stable structure. Compared with the traditional wet non-woven process, the hot-rolled spunbond process does not require the addition of any chemical adhesives during the production process, so the product is more environmentally friendly and the material purity is higher.

2. The importance of thickness uniformity in non-woven fabrics
Thickness uniformity is one of the key quality indicators of non-woven products, which directly affects its application effect in various fields. For polyester hot rolled non-woven fabric, good thickness uniformity ensures the stability of the material during processing, use and transportation. If the thickness of the non-woven fabric is uneven, it may cause performance fluctuations in the product during use, such as poor air permeability, insufficient strength or easy tearing, affecting the end-user experience.

In many industries, the thickness uniformity of non-woven fabrics is extremely high. For example, in the medical field, polyester hot-rolled non-woven fabrics are used to produce protective equipment such as surgical gowns and masks. The uniformity of thickness directly affects its protective effect and comfort; in the packaging industry, uneven thickness may cause irregular bending and wrinkling of the material in actual application, affecting the appearance and performance of the product.

3. How to improve the thickness uniformity and stability of the hot-rolled spunbond process?

1. Accurate control of fiber distribution
The hot-rolled spunbond process can achieve uniform distribution of fibers in a short time through advanced production equipment. Polyester fibers are melted and sprayed on the spinneret, and the fibers are evenly distributed on the mesh structure through high-speed airflow. After heating and pressing in the hot-rolling process, the fiber layers in the fiber web are tightly pressed together, ensuring the uniform distribution of fibers and the tightness of interlayer bonding.

2. Uniform application of hot pressing process
The hot pressing process plays a vital role in the hot-rolled spunbond process. By precisely controlling the temperature, pressure and speed of the hot-rolling mill, it can ensure that heat energy is evenly applied to every part of the entire fiber web. The appropriate control of temperature ensures that the polyester fiber will not be overheated or overcooled during the melting process, avoiding uneven pressing of the material. At the same time, the uniformly applied pressure ensures that the fibers in each area can be fully bonded together, thus forming a non-woven fabric with uniform thickness.

3. Optimized fiber bonding and shaping effect
Another important feature of the hot rolling process is that it can achieve hot melt bonding of polyester fibers at high temperatures, making the bonding between fibers tighter. This high-strength bonding effect ensures that the non-woven fabric will not have uneven thickness caused by weak bonding during the production process. In addition, the hot rolling process can effectively shape the fibers to form a flat fiber mesh structure, thereby improving the stability of the material.

4. Thickness control for wide-width production
The company's newly launched Polyester hot rolled non-woven fabric has a width of up to 1000mm to 3300mm, which allows the product to maintain a consistent thickness during large-scale production. Thickness control is particularly important during large-scale production. The hot calendering process ensures that each roll of nonwoven fabric produced in a large width has a highly consistent thickness by precisely controlling fiber distribution, applying pressure and heat, avoiding thickness fluctuations that may occur in traditional production methods.