Why use polypropylene non-woven fabrics
Polypropylene non-woven fabric is a kind of non-woven fabric prepared from polypropylene as raw material through the processes of melting, spinning, laying, bonding, and crimping. Due to the simple process flow and large output, it is non-toxic and harmless to the human body. Therefore, it is widely used in sanitary materials, medical supplies, bedding, sofas, luggage, shoe materials and clothing.
Polypropylene non-woven fabric has the characteristics of low density, soft texture, fluffy and plump, non-toxic, breathable, etc. It is used for the surface layer and bottom layer of disposable sanitary products after hydrophilic and water-repellent modification. , giving the product the functions of hydrophilic, water-repellent and breathable, and can be used for disposable products such as diapers for infants and young children.
Hot-rolled polypropylene non-woven fabric is made of spinning, stretching, meshing, heat It is prepared by rolling and other processes, and there are many meshes and pores between polypropylene yarns, which have the advantages of good air permeability, low cost, convenient processing, and low environmental load. As the gram weight of the non-woven fabric increases, the mesh structure becomes denser, the porosity becomes smaller, and the air permeability becomes stronger;
When the gram weight is in the range of 25,45g/m2, the MVRT reaches 2100g /(m2.24h); The MVRT of the disposable sweat-absorbent towel prepared with polypropylene non-woven fabric reaches 2080g/(m2.24h), the air permeability and comfort are better than that of the polyethylene breathable film, and it has a good cost performance.
During the preparation process of hot-rolled polypropylene non-woven fabric, the extrusion and traction speeds generally remain unchanged, and the fiber diameter basically remains unchanged. The increase in gram weight is achieved by reducing the speed of the laying traction belt . The number of fibers accumulated per unit area increases, the pores between the fibers become smaller, the greater the gram weight of the non-woven fabric, the greater the thickness, the smaller the porosity, and the poorer air permeability. As the gram weight of the non-woven fabric increases, the mesh structure becomes denser and the pores between the fibers gradually decrease. When the spinning and drawing conditions remain unchanged, the diameter of the fiber remains basically unchanged, the drawing speed of the web is slowed down, the number of fibers accumulated in a unit area increases, the denser the polypropylene filament is, and the thickness of the non-woven fabric increases. The higher the gram weight, the smaller the pores.
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