The invention relates to a recycled PET foam and a preparation method thereof. It is a process of adding multifunctional oligomers modified polyolefins, foaming agents, and recycled PET bottle flakes into a twin-screw extruder for melting.
Physical foaming agents are injected into the melt, mixed by twin-screw, and then sent to a single screw extruder for constant temperature cooling.
The PET foam products are extruded and foamed through a die, and then cooled and shaped to obtain PET foam products; The multifunctional oligomer modified polyolefin is a polyolefin containing multiple epoxy groups.
The present invention successfully solves the problems of unstable foaming and severe performance loss caused by excessive mixing of other materials in recycled PET bottle flakes.
By combining multifunctional oligomer modified polyolefin with recycled PET bottle flakes, the compatibility is effectively improved, making the application of recycled bottle flakes more stable.
In addition, by injecting physical foaming agents, better control can be achieved during the foaming process, further improving the quality and performance of the product.
Country Code: CN
Application Number: CN202311603426.1
