Liner converting

Converting changes a roll or sheet into a liner that can be assembled repeatedly. Longitudinal slitting controls web width; cross-cutting controls blank length; forming and joining create the final enclosure. Those operations need their own acceptance checks.

Die-cut polyurethane foam liner and thickness caliper on an inspection bench

Field note / liner converting

Polyurethane Foam Liners: Closed-Cell Ratio, Compression Set and Die-Cut Tolerance Callouts

Plan polyurethane foam liner callouts for cell structure, compression set, material thickness and cut-edge inspection, with a drawing handoff checklist.

October 28, 2026

Engineering chart of insulated box liners comparing 1-piece bottom-gusseted foil bubble pouches and 2-piece scored die-cut thermal liners by seam and R-value

Field note / liner converting

Insulated Box Liners: 1-Piece Gusseted Pouches vs. 2-Piece Die-Cut Thermal Liners

Compare insulated box liners across 1-piece gusseted foil bubble box liner pouches and 2-piece die-cut thermal box liner for shipping blanks, corner leakage, and ISTA hold.

October 26, 2026

Upright roll of white fibrous material resting on a pallet with an empty cardboard core

Field note / liner converting

Insulated Liner Converting: Cutting, Forming and Assembly

A practical traveler for insulated liner production: connect material identity, blank geometry, folds, joining and carton assembly.

October 16, 2026

Field note / liner converting

Slitting and Rewinding for Insulated Liner Materials

Define web structure, roll inputs, slit pattern and output acceptance for insulation materials before evaluating slitting equipment.

October 16, 2026