Polypropylene acoustic wool and preparation technology thereof

Abstract

The invention discloses polypropylene acoustic wool and a preparation technology thereof. The raw materials for preparing the acoustic wool comprise non-woven fabric and a polypropylene blend fiber, wherein the polypropylene blend fiber is prepared from syndiotactic polypropylene and isotatic polypropylene. The preparation technology comprises a slicing step, namely mixing the syndiotactic polypropylene and the isotatic polypropylene at mass percent, and then carrying out slicing and drying; a melt-blown spinning step, namely extruding and melting the mixed sliced material of the syndiotactic polypropylene and the isotatic polypropylene, and carrying out melt-blown spinning; a cooling step, namely introducing cold air, cooling, pulling and dividing the spun yarn to obtain a polypropylene blend fiber; and a product forming step, carrying out hot-pressing on the front surface and the back surface of the obtained polypropylene blend fiber to form non-woven fabric layers respectively, and then carrying out reinforcing, trimming and winding to obtain the acoustic wool. The preparation technology is easy to produce on a large scale; and the acoustic wool which is good in sound insulation property, good in flexibility, good in elasticity, good in hand feeling, light in mass, free of pollution, good in plasticity and the like is prepared.

Description

technical field [0001] The invention relates to the field of nonwoven fabrics, in particular to a polypropylene sound-absorbing cotton and a preparation process thereof. Background technique [0002] Sound, on the one hand, allows people to continuously recognize and perceive the richness and beauty of the objective world, and on the other hand, it also changes people's lifestyles and development processes. The problem of sound pollution is gradually emerging with the continuous progress of human society. The consequences of industrialization, intelligence, and integration have brought sound pollution from many sources, which not only greatly interferes with the normal functions of the human body, causes hearing loss, organ damage, and system imbalance, but also causes serious damage to many precision machinery and equipment systems. unforeseen destruction. Therefore, there is an urgent need for a sound-absorbing material with excellent sound-absorbing effect, low cost, an...

AI Technical Summary

Problems solved by technology

However, this patent uses a large number of additives, which are not easy to melt, and it is difficult to reach the level of blending. The prepared product has poor thermal stability and poor sound absorption effect.

Images