Polymer entry——melt extrusion——fiber formation——fiber cooling——web formation——consolidation into cloth.
Skin-core type: It can make the planonwoven soft so that it can be made into concentric, eccentric, and special-shaped products. Use generally cheap materials for the core. Expensive polymers with special or desired properties are the skin layers.
If the core is polypropylene and the outer sheath is nylon, this makes the fiber hygroscopic. The core is polypropylene, and the outer skin is low-melting polyethylene or modified polypropylene, modified polyester, etc. that can be bonded. For carbon black-based conductive fibers, it wraps the conductive core inside.
Side-by-side type: It can make the planonwoven have good elasticity. Usually, it is made of side-by-side bicomponent fibers from two different polymers, or the same polymer with different viscosities. It can be made into spiral crimped fibers by using different thermal shrinkage properties of different polymers.
Tip type: This is another polymer compounded in the trilobal, cruciform and tip. For example, when making antistatic, moisture-conducting, and conductive fibers, conductive polymers can be compounded, which can conduct moisture, conduct electricity, and resist static electricity, and save the amount of conductive polymers.
Micro-denier type: Orange petal-shaped, strip-shaped peel-off modules, or sea-island modules can be used. Microfiber webs, or even nanofiber webs, are made by exfoliating two incompatible polymers.
Hybrid type: It is a fiber web that combines different materials, different colors, different fibers, different cross-sectional shapes, and even with skin-core fibers, both co-spun and bicomponent fibers, so that the fibers have the required properties. .
Compared with general meltblown fiber products, this kind of melt-blown bicomponent fiber planonwoven or mixed fiber planonwoven can further improve the filterability of the filter medium, and make the filter medium have antistatic, electrical conductivity, hygroscopicity, enhanced barrier properties, etc. Or improve the cohesiveness, bulkiness and air permeability of the fiber web.
Bicomponent meltblown fibers can complement the performance of a single polymer, such as polypropylene is cheaper. However, if it is used in medical and sanitary materials, it is not resistant to radiation. In this way, polypropylene can be used as the core, and an appropriate radiation-resistant polymer can be selected as the outer layer to wrap the outer layer to solve the problem of radiation resistance.
Thereby, the price of the product can be made cheap, and the functional requirements can be fulfilled. Heat and humidity exchangers such as those used in the medical field for respiratory systems can provide suitable natural-like heat and humidity.
Melt-blown non-woven polypropylene fabric is lightweight, disposable or easy to sterilize, inexpensive, and serve as an additional filter to remove contaminants. It consists of two uniformly mixed bicomponent meltblown webs.
It adopts sheath-core bicomponent fiber, the core is polypropylene, and the skin is nylon. Bi-component fibers can also use special-shaped sections, such as trilobal, multi-lobal, to make their surface area larger.
At the same time, a polymer that can improve filtration performance can also be used in the surface layer or the tip of the blade, and the olefin or polyester meltblown bicomponent fiber web can be made into a cylindrical liquid and gas filter.
Melt blown nonwoven fabric can also be used for cigarette filters. Meltblown nonwoven polypropylene fabric uses the wicking effect as a high-absorbent ink core. Wicking sticks for fluid retention and infusion.