Non-woven bags are widely used because of their environmentally friendly characteristics, but they often change shape after long-term use, affecting their beauty and practicality. The following is a study of factors that affect their shape retention.
First, material quality is a key factor. High-quality non-woven materials have high strength and toughness, and can withstand a certain amount of weight and external force without deformation. For example, non-woven fabrics made of long fibers are more structurally stable than short fibers and can better maintain their shape. However, some low-quality non-woven fabrics may have uneven fiber distribution during the production process, and local weak points are easily deformed by force during use, resulting in the shape of the entire bag being distorted.
Secondly, the production process plays an important role. The fineness of the cutting, sewing and corner processing of the bag affects shape retention. Precise cutting ensures that the force on each side is uniform, and rough cutting may cause uneven force and deformation. The stitch density and thread strength of the seam are also crucial. Sparse stitches or easily broken threads are prone to cracks or deformation in the bag when bearing heavy objects. In addition, if the process details such as the reinforcement of the bag mouth and the support design of the bottom are not handled properly, the bag mouth may become loose after long-term use, and the bottom may sag and sag, and it will not be able to maintain the original shape.
Furthermore, the usage method and environment cannot be ignored. Frequent loading of heavy items, exceeding the load limit of non-woven bags, will cause the bag body to overstretch and be difficult to recover. When used in a humid environment, moisture may weaken the bonding force between non-woven fibers, making the bag soft and deformed. For example, if it is not dried in time after use on rainy days, non-woven bags will easily lose their original crisp shape after repeated use. Long-term exposure to sunlight will also damage the fiber structure, causing the material to age and become brittle, affecting the stability of the shape.
Finally, storage conditions also have an impact. If non-woven bags are folded and squeezed at will during storage, especially if they are in this state for a long time, the fibers will form creases that are difficult to recover, and it will be difficult to restore to the original shape the next time they are used. The correct storage method should be to place or hang them flat to avoid excessive squeezing and twisting.
The material quality, production process, usage and environment, storage conditions and other factors work together to affect the shape retention of non-woven bags after long-term use. Understanding these factors is of great significance for manufacturers to improve their products and consumers to use and store non-woven bags correctly, which helps to extend the effective use period of non-woven bags and better play its environmental protection and practical value.
