During the dyeing and finishing process of open-width fabrics, due to the influence of mechanical and chemical effects, the warp tension at each point in the entire width of the fabric is not equal. Usually, the weft tension is very small. In this way, the fabric is prone to weft shrinkage and warp wrinkles. If not discovered and removed immediately, the wrinkles will continue and intensify, causing a large number of defects, seriously affecting product quality, and even causing mechanical damage. This situation is particularly prominent in processes such as padding, padding, steaming, and drying.
The main reason why fabrics produce warp wrinkles during processing is that the weft tension is too small. The expander increases the weft tension of the fabric through mechanical action to achieve the purpose of wrinkle prevention and wrinkle removal. Therefore, the expander is one of the main common devices in open-width processing, dyeing and finishing equipment.
There are many types of amplifiers, including threaded amplifiers, curved roller amplifiers, telescopic plate amplifiers, tapered roller amplifiers and flexible spiral amplifiers. This section mainly introduces the thread expander and roll bending expander that are currently the most widely used in factories.
AAA composite fabric mesh VEGTRHYTJ
