When it comes to nonwovens, I believe people in the sanitary products industry are familiar with them. It can be found in products from diapers to sanitary napkins. In short, nonwovens are not interwoven or wound by yarns, but directly bonded together by physical methods. Nonwovens have jumped out of the general routine of traditional textile. Therefore, compared with traditional methods, nonwovens have the characteristics of short process flow, fast production speed, high output, low cost, wide use and many sources of raw materials. As a kind of super Imitation cotton polyester spunlaced nonwovens, how is its structure different from that commonly used? Next, let's have a look.
Experimental steps: the nonwovens dried after Spunlaced are made into small samples (the size depends on the size of the sample loading table), placed on the sample loading table, and sent to the scanning electron microscope for observation.
By comparing the surface morphology of super Imitation cotton polyester and ordinary polyester Spunlaced materials, it can be seen that the fibers are intertwined with each other. Because the mesh curtain is plain structure, there is no mesh (mesh) structure on the surface of the electron microscope image, the fiber entanglement and holding are irregular, and the high-pressure water needle puncture is formed by the reflection of the mesh curtain. The test results well reflect the winding and hugging between the fibers. It can be seen that the fibers are interspersed, tightly hugged and irregular; Ordinary polyester Spunlaced materials are more tightly wound.
Compared with the super Imitation cotton polyester spunlaced nonwovens with 5% and 20% ES fiber, it can be seen that the ES fiber is entangled with the super Imitation cotton polyester fiber and hugged in a large area under the puncture action of high-pressure water needle; Because the fineness of ES fiber is more than twice that of super Imitation cotton polyester fiber, thicker ES fiber can be clearly seen and tightly wound with super Imitation cotton polyester fiber. By analyzing the cross-section of super Imitation cotton polyester spunlaced nonwovens with 5% and 20% es fibers, it can be seen that a certain amount of ES fibers are interspersed and wound with super Imitation cotton polyester fibers; Because the length of ES fiber is 51mm, which is 13mm longer than 38mm super Imitation cotton polyester, the entanglement node between fibers is increased, the entanglement effect is enhanced, the utilization rate of fiber strength is improved, and the strength of the material is improved. The above super Imitation cotton polyester spunlaced nonwovens have not been treated by hot air, so there is no thermal bonding point.
Super Imitation cotton spunlaced nonwovens were added with 20% ES fiber and dried in an oven at 150 ℃ for 20 minutes. The melting point of the outer fiber of ES fiber is about 130 ℃, mainly because the fiber is a two-component fiber. When dried at 150 ℃, the outer fiber melts and bonds with the entangled fiber to play a reinforcing role; The bonding point and bonding between ES fiber and super Imitation cotton polyester fiber also make the material gap larger and the structure more fluffy. The analysis of hot air nonwovens shows that the entangled parts between ES fibers are bonded to each other, giving the material a certain strength; It can also be seen from the electron microscope pictures that the fiber gap is large and the number of layers is large, which reflects the characteristics of fluffy structure and large thickness of the material.
Through the above experiments, it is analyzed that there are many influencing factors of diaper super Imitation cotton polyester spunlaced nonwovens, especially with different addition amount of ES fiber. But there is no doubt that this material has more advantages in the application of diapers than ordinary polyester Spunlaced materials.