With the improvement of material living standards, human development has caused more and more damage to nature. In order to save resources and reduce damage as much as possible, people have proposed resource regeneration, so the term "recycle" is mentioned by more and more people.
In the environmentally friendly textile industry, people are even more committed to looking for textile materials that are environmentally friendly, practicable and highly practicable. Under this urgent demand, recycled fibers have emerged. So what is recycled fiber?
Recycled fiber is a fiber made from waste bottle flakes, plastics, and clothing as raw materials through chemical and physical means combined with spinning methods. It subverts the traditional source of fiber raw materials, sorts out and utilizes waste resources, and produces new fibers that are almost the same as virgin fibers, achieving the unity of greenness, recycling and high utilization.
The physical method refers to the physical transformation of bottle flakes into fibers or other products through melt extrusion. Currently, it mainly includes two methods:
(1) Extrude bottle flakes directly into fibers;
(2) First, the bottle flakes are converted into pellets or crumbs (granulation), and then the pellets or crumbs are melted and extruded into fibers. Products produced by physical methods have poor mechanical properties and are difficult to meet textile standards. They are generally used as fillers, but this method is relatively simple to produce and has low cost.
The chemical method is to depolymerize the recycled polyester into smaller molecules, then polycondensate into high-quality polyester chips, and then spin the chips into filaments. This method can achieve complete recycling. In comparison, chemical law has developed slowly due to three limitations in efficiency, raw materials, and processing. Therefore, most of the domestic recycling of recycled PET bottle flakes use physical methods to achieve