Foldable packaging insert comprising multiple celllulose-based air-laid or solid foam

A packaging insert comprising:

• a plurality of cellulose-based air-laid or solid foam substrates, each cellulose-based air-laid or solid foam substrate having a first main side and a second main side opposite to the first main side;
• a first paper-based sheet attached to the first main sides of the cellulose-based air-laid or solid foam substrates of the plurality of cellulose-based air-laid or solid foam substrates;
• a second paper-based sheet attached to the second main sides of the cellulose-based air-laid or solid foam substrates, wherein
• the cellulose-based air-laid or solid foam substrates are sandwiched between the first paper-based sheet and the second paper-based sheets and form a plurality of sandwich sections,
• wherein the plurality cellulose-based air-laid or solid foam substrates are spaced apart from each other when the sandwich sections are arranged one after another along a longitudinal axis of the packaging insert;
• and
• at least one hinge section comprising:
• a portion of the first paper-based sheet that is not attached to any cellulose-based air-laid or solid foam substrate or to the second paper-based sheet;
• and
• a portion of the second paper-based sheet that is not attached to any cellulose-based air-laid or solid foam substrate or to the first paper-based sheet, wherein each hinge section of the at least one hinge section is interposed between consecutive sandwich sections of the multiple sandwich sections, and,
• wherein the packaging insert is configured to fold in the at least one hinge section.