Hot rolling is the last web forming technology in the production process of non-woven fabrics. It is a process of cooling fabrics after finishing silking. Hot rolling is high heat (100~150 degrees. Rolling mill rolls evenly through the filaments to melt The net is formed, so there will be rolling points on the cloth surface of the hot-rolled non-woven fabric, which is similar to the pinhole, but does not penetrate. The specific size depends on the size and density of the steel bar of the rolling wheel. [br/] It is not difficult to find As a process, the hot-rolled non-woven fabric is not a specific kind of cloth, but a general name of a kind of non-woven fabrics formed by a similar process. Generally speaking, the hot-rolling treatment process is a spunbond method. Polypropylene non-woven fabric (PP., polyester non-woven fabric (PET., PA nylon (PA.) The biggest difference between the three categories is the difference in processing raw materials.
(1. Natural fiber: cotton, wool, hemp, silk;
(2. Conventional fibers: viscose fiber, polyester fiber, acetate fiber, polypropylene fiber, polyamide fiber;
(3. Differentiated fibers: ultrafine fibers, shaped fibers, low melting fibers, high crimped fibers, antistatic fibers;
(4. High-functional fiber: aramid fiber, carbon fiber, metal fiber.
Nonwovens can possess many features and distinguish properties such as non-entangled edges and unique fiber orientation in the fabric.
They can be soft or hard, strong, weak, oriented and omnidirectional in performance, with one or both sides smooth or uneven, providing bulk or very compact, two or three dimensions, solid or patterned openings, absorbent or repellent and Porous puncture.
Many of these features can be combined in one receipt to satisfy a final use product. Nonwovens can stretch, stretch and recover and the pore size is specific, but can't be drawn, which is a very important difference between non-woven fabrics and woven fabrics.
In addition, they can provide excellent substrates for coatings, composites, lamination, printing, embossing and forming, so they are often used on packaging materials. Relatively speaking, non-woven fabrics are more expensive than ordinary packaging cartons. It is also not widely used. If nonwoven fabric manufacturers want to fully open this big market, reducing costs and taking the green route is undoubtedly the biggest challenge.
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