Patent ID: 11872798
Assignee: FIBERTEX NONWOVENS A/S
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B  D | IPC B  D

Claim 12:
13. A nonwoven fabric, wherein the fabric has an air permeability of between 100 and 1500 l/m2/s when measured at a pressure difference of 200 Pa according to EN ISO 9237 and comprises at least two distinct layers of nonwoven fiber webs, wherein a first web comprises at least 30 wt-% of splittable fibers and a second web comprises less than 20 wt-% of splittable fibers or no splittable fibers, wherein the splittable fibers of the first web are at least partially split into small filaments and wherein the fibers from the first and second fiber webs are interentangled, and wherein the fabric is impregnated with a binder that stiffens and fixates the fabric and with a flame retardant.