Filter Paper & Felt Paper, Uncoated, in Rolls or Sheets

Filter paper is characterized by controlled porosity designed to separate solids from liquids or gases, while felt paper has a denser, non-woven fiber structure used for cushioning, sealing, or acoustic dampening. Both are uncoated and traded in rolls or sheets under this heading, but end-use documentation and fiber composition may be requested by customs to confirm classification.

Filter paper that comes into direct contact with food during processing may be subject to FDA food-contact material regulations. Importers should obtain supplier declarations confirming compliance with applicable food-contact standards and retain those records for potential CBP review.