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Meltblown non-woven fabrics, also known as meltblown non-woven fabrics, is a technology that uses high-speed, high-temperature airflow to blow polymer melts, causing them to quickly stretch and condense into ultrafine fibers, thereby forming nonwoven fabrics.
Technical Principles and Production Process
Technical Principles
The production principle of meltblown nonwoven fabrics is mainly based on the blowing action of high-speed, high-temperature airflow. In this process, the polymer melt is extruded and passes through a specially designed nozzle, and then is blown and stretched into ultrafine fibers by a high-speed airflow. These ultrafine fibers are then collected on a collection curtain and formed into nonwoven fabrics by self-bonding or adding adhesives.
Production Process
The production process of meltblown nonwoven fabrics mainly includes the following steps:
Polymer feeding: feed raw materials such as polypropylene (PP), polyester (PET), and polyamide (PA) into the feeding system.
Melt extrusion: the raw materials are melted at high temperature and extruded into a melt through the nozzle of the mold.
Fiber formation: the melt is rapidly stretched into ultrafine fibers under the blowing of high-speed airflow.
Fiber cooling: The stretched fibers are rapidly cooled and solidified in the cooling device.
Web formation: The cooled fibers are collected on the collection curtain to form a fiber web.
Reinforcement into cloth: The fiber web is reinforced into nonwoven fabric by self-bonding or adding adhesive.
Main applications
Filter materials
Meltblown nonwoven fabrics are widely used in the field of filtration due to their ultra-fine fibers and rich pore structure. Its high filtration efficiency and low resistance characteristics make it an ideal choice for medical masks, air purifier filters, liquid filtration materials, etc. Through electrostatic electret treatment, meltblown nonwoven fabrics can further improve their filtration effect and effectively capture tiny particles.
Medical and health materials
In the field of medical and health care, meltblown nonwoven fabrics are mainly used to make surgical gowns, protective clothing, medical dressings, etc. Its good air permeability and antibacterial properties provide effective protection for medical staff. In addition, meltblown nonwoven fabrics can also be used to make disposable sanitary products such as absorbent pads and sanitary napkins.
Other applications
In addition to the above fields, meltblown nonwovens are also widely used in thermal insulation materials, oil absorbent materials, wiping cloths and other fields. Its unique fiber structure and performance characteristics make these products perform well during use.
