Research Progress of PET Pelletizing Machine

With the advancement of catalyst technology, there has now been a technology for preparing spherical PET resin directly from the polymerization vessel without further pelletization. Direct production and processing do not require pelletized resin, not only can save a lot of energy-consuming extrusion and pelletizing steps, but also the low-crystalline enterprise products obtained from the reactor will not undergo morphological changes, which is beneficial to shorten the processing plant cycle and save processing Plant energy. This process combines slurry prepolymerization technology with gas phase fluidized bed technology. The reaction is first carried out in a small loop reactor, and then the prepolymer is continuously passed through one or two short residence time gas phase fluidization The two gas-phase fluidized beds can control and maintain completely independent gas composition, and the temperature and pressure can be independently controlled, realizing greater flexibility in product design.


The spherical titanium catalyst used in this technology shows the characteristics of three-dimensional space in physical and chemical structure, which can artificially control the electromagnetic properties of the plasmid carrier itself, and control the distribution of active centers on the plasmid carrier. The principle is: by controlling the porosity of the plasmid carrier, the active centers are preferentially distributed on the surface, so that the ability of the monomer to diffuse outside is limited, so that a porous structure or hollow polymer can be obtained during the entire polymerization reaction. Compound particulate matter, and the particulate matter itself becomes a reactor. The other monomers introduced into it can be polymerized or mixed under the function of the active center inside the hollow particulate matter to produce and process an extremely balanced polymerization reaction blend or Called polymer compound alloy. Using different monomer formulations, homopolymers, copolymers, polyurethane elastomers and other multifunctional polymer compounds can be obtained.

To use plastics as particles, we must first sort out waste plastics; then develop categories, which cover color categories and varieties; then go to the shredder to carry out crushing and cleaning; after crushing and cleaning, go to the extruder to carry out extrusion , Extruded into strips, and then cut into particles; the particles are cut into raw materials for stainless steel products. After the treatment of plastic granulator, the waste plastic that could not bear to look directly at the first time immediately became colorful plastic particles. This kind of recycled plastic particles still have good comprehensive material properties, and technical requirements such as injection molding, wire drawing, pipe jacking, casting, and extrusion can also be considered, and they can be widely used in the production and processing of stainless steel products. After further processing plants of small and medium-sized stainless steel products, they have become our long-awaited plastic washbasins, folder names, plastic films, industrial machinery components, etc. This kind of enterprise products have a wide range of applications and become a favorite in the professional market. The plastic granulator produced and processed by small and medium-sized enterprises has little financing and a small construction scale, and does not form secondary pollution. It is an industrial chain necessary for social development. The marketing and promotion of plastic pelletizers has made waste plastic a key resource. There is less plastic waste everywhere, and the profit of processors is increased.