Patent ID: 11946169
Assignee: PFNONWOVENS LLC
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC D  B  Y | IPC B  D

Claim 0:
1. A process for making a spunmelt nonwoven web on a spunmelt production line, comprising:
providing a mixture of recycled polypropylene;
extruding the recycled polypropylene mixture to form a molten recycled polypropylene mixture;
filtering the molten recycled polypropylene mixture through a filter to form recycled polypropylene filtrate having a melt flow rate within a range of 20 g/10 min to 100 g/10 min as tested in accordance with ASTM 1238, the filter having a mesh size that is finer than a mesh size of a finest filter used in the spunmelt production line by a factor of at least 1.1;
dosing the recycled polypropylene filtrate into the spunmelt production line by an amount of 100% by weight;
passing the recycled polypropylene filtrate through at least one spinneret of the spunmelt production line to form filaments at a spinning speed of greater than 1200 meters per minute, the formed filaments being mono-component, bicomponent or multicomponent filaments, all polypropylene components of the filaments comprising 100% by weight recycled polypropylene;
cooling and drawing the filaments; and
depositing the filaments on a moving belt to form at least one layer of the spunmelt nonwoven web made up of 100% by weight of recycled polypropylene fibers.