The quality of polypropylene fiber is better than that of cotton; second, the moisture absorption rate of polypropylene fiber is 0; third, the polypropylene fiber has great wear resistance and high strength; fourth, the polypropylene fiber has good corrosion resistance, can resist weak acid and alkali; 5, polypropylene has good stability, so organic solvents stick to clothes and is easy to clean. As mentioned above, poly Propylene fibers can also be used in building materials, for example in concrete Polypropylene fiber, can enhance the fracture strength and impact resistance of concrete, prolong the service life of concrete. Generally, 0.9KG fiber should be added to each cubic meter of concrete, one ton of cement should add fiber 1.5-2.5KG, and the fiber should be added to the dry cement, and then add water to stir, the stirring time is about 30-60 seconds longer than the cement without fiber, so made The wear resistance and strength of concrete have been significantly improved. Of course, polypropylene fibers can enhance the wear resistance and breathability of gypsum in gypsum. Polypropylene fiber can also be used in batteries, so what is its working principle? What is the effect of it? In batteries, polypropylene fiber is often used as a diaphragm because of its excellent thermal insulation, alkali resistance, wear resistance and oxidation resistance, which meets the needs of batteries and can ensure the normal operation of the storage mechanism. A single-layer PP diaphragm is a film that extrudes PP particles through a casting process. To make a thick PP film, a nucleation improver needs to be added to the PP particles to form a microporous film using double stretching. These two types of diaphragms are currently used more in batteries. Later, new energy steam anti-cracking fiber is a kind of anti-crack fiber that uses polypropylene as raw material and is refined through melting, extrusion, drawing, cutting and other processes through unique processes and equipment. It is an anti-crack fiber specially added to mortar and cement concrete that can play a cracking and anti-seepage function. Secondly, after the stone absorbs water, it will reduce the bonding force between the particles, which will reduce the technical properties of the stone itself. For example, the compressive strength and bending strength will generally decrease sharply, and it is prone to danger. Third, if the water absorption rate of stone is high, it will increase its own weight. If the weight is increased too much, it will affect the original design carrying capacity of the building, affect the service life of the building, and increase the safety hazard. Fourth, the stone has a high water absorption rate, so moisture will enter along the gaps in the stone.