Non-woven vest bags are increasingly used in daily life, and their load-bearing capacity is a key indicator of their quality and practicality.
First, the quality and characteristics of the raw materials have a fundamental impact on the load-bearing capacity. Choosing high-strength and high-tenacity non-woven fiber materials, such as high-quality polypropylene (PP) fiber, can significantly improve the initial strength of the bag. Factors such as fiber thickness, length and density are crucial. The interweaving of thicker, longer and denser fibers creates a more stable structure that can better bear weight.
Secondly, the production process of non-woven vest bag cannot be ignored. For example, the needle punch density and depth of a non-woven fabric will affect the degree of entanglement of its internal fibers. Higher needle punching density and appropriate depth can tightly combine the fibers and enhance the overall tensile properties, thus improving the load-bearing capacity. In addition, the sewing process of the bag body includes the material, thickness and stitch length of the thread. If the stitching is not strong, the thread will easily break when bearing heavy objects, which will reduce the upper limit of load-bearing.
The size and shape design of the non-woven vest bag also restricts the load-bearing capacity. Larger sizes may have certain advantages in distributing weight, but if the length-to-width ratio is unreasonable and the force is uneven, it may easily lead to local damage. For example, when a bag that is too narrow and long is carrying heavy objects, the pressure on the mouth and bottom of the bag is concentrated, making it more likely to be damaged. Reasonable design of the width and thickness of the handle and the connection method with the bag body are also extremely critical. A wide, thick and firmly connected handle can better distribute the weight and reduce local stress.
Coating treatment is one of the effective means to optimize load-bearing capacity. Coating a thin layer of plastic or other reinforcing materials on the surface of a non-woven fabric can improve its water resistance and abrasion resistance while enhancing its overall strength. However, the thickness and uniformity of the coating need to be precisely controlled. If it is too thick, it may affect the flexibility of the bag, and if it is too thin, the expected enhancement effect cannot be achieved.
Hot pressing treatment in the post-processing process can also improve the load-bearing performance. Through appropriate hot pressing temperature and pressure, the non-woven fibers can be further integrated and shaped to improve its structural stability. However, the hot pressing parameters need to be carefully adjusted according to the material and thickness of the non-woven fabric to avoid excessive hot pressing causing the material to become brittle.
During use, the user's operation method will also affect the actual load-bearing performance of the bag. For example, avoiding excessive shaking, dragging, and overloading will help extend the service life of the bag and ensure that it can be used safely within the designed load-bearing range.
To improve the load-bearing capacity of non-woven vest bags, it is necessary to comprehensively consider and take corresponding measures from various aspects such as raw material selection, production technology, design optimization, coating and post-processing, and standardized use.
