Segment for a smoking article comprising a calendered fiber web

Segment for a smoking article, which comprises a wrapper material and a filter material, wherein the wrapper material wraps the filter material and at least 10% and at most 100% of the mass of the filter material is formed by a calendered fibrous web, wherein at least 50% and at most 100% of the mass of the calendered fibrous web is formed by organic polymer fibers, and wherein the calendered fibrous web has a compression factor C of at least 0.45 and at most 0.85, wherein the compression factor is calculated by

• C
• =
• 1
• d
• ⁢
• ∑
• i
• =
• 1
• N
• m
• i
• ρ
• i
• .
• wherein d is the thickness of the calendered fibrous web determined in accordance with ISO 534:2011, mi,
• with 1≤i≤N, is the mass per unit area of the i-th of N≥1 components of the calendered fibrous web,
• and ρi, with 1≤i≤N, is the density of the i-th of the N≥1 components,
• wherein the N components considered for the calculation of the compression factor C are selected such that the sum of the masses per unit area mi from i=1 to i=N is at least 90% of the basis weight of the calendered fibrous web determined in accordance with ISO 536:2019.