The topsheet is one of the main components of diapers, and it is also a very important part. The surface layer is in direct contact with the baby, so the comfort of the surface layer will also directly affect the baby. Today, the editor will tell you about two kinds of diaper topsheet - the difference between hot air non woven fabric and spunbond non woven fabric, and how to identify them.
1. Production principle.
Hot air non woven is a kind of hot air bonding (hot rolling, hot air) non woven fabric. It is to use the hot air on the drying equipment to penetrate the fiber web after the short fibers are combed to make them heated. And to be able to bond the resulting non-woven fabric.
Spunbond non woven fabrics, after extruding and stretching polymers to form continuous filaments, the filaments are laid into a web, and the web is then subjected to self-bonding, thermal bonding, chemical bonding or mechanical reinforcement methods to make the fiber web. into a non-woven fabric. Spunbond nonwovens are long fibers but their raw material is plastic chips.
2. Comparison of advantages and disadvantages.
Hot air non woven fabric: It has the characteristics of high bulkiness, good elasticity, soft hand feeling, strong warmth retention, good air permeability and water permeability. But its strength is low and easy to deform.
Spunbond non woven fabric: It is directly formed from polymer particles after spinning into a network without using fibers, and then heated and pressurized by rollers. It has excellent mechanical properties and excellent tensile strength, elongation at break, tear strength and other indicators. , The thickness is very thin, but the softness and air permeability are not as good as those of hot air non woven fabrics.
Therefore, the surface layer of general good diapers is made of hot air non woven fabrics. Spunbond non woven fabrics are mainly used in the manufacture of medical and health care. However, there are also many diaper manufacturers who choose to use spunbond non woven fabrics in order to save costs.
3. How to distinguish between hot air non woven fabric and spunbond non woven fabric?
a. Difference in feel
The most direct way is to touch it with your hands. The hot air non woven diaper will be softer and more comfortable to the touch, and the spunbond non woven fabric will be harder to the touch.
b. Gently pull
Get the diaper, gently pull the surface of the diaper, the hot air non woven fabric can easily pull out the silk, if it is a spunbond non woven fabric, it is difficult to pull out the whole piece of silk.