Thermopod

Independent publication

Source-based editorial guides to packaging materials and operations.

Open EPS foam shipper body, lid and cross-section wall specimen on an inspection bench

Field note / protective mailers

EPS Foam Shipper Walls: Bead Fusion Percentage, Molding Density and Water Uptake Checks

Plan EPS foam shipper-wall inspection: record fracture appearance, dry molded-part weight and liquid-water checks with a downloadable acceptance worksheet.

October 28, 2026

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

Open insulated shipper with silver barrier-wrapped panels, protective cushioning and a separate panel on a mat

Field note / protective mailers

Vacuum Insulated Panels in Shippers: Puncture, Edge Thermal Bridges and Inspection

Inspect vacuum insulated panels for barrier damage, separate panel-edge heat flow from shipper joint gaps, and record receiving and reuse decisions.

October 27, 2026

Comparison chart of cold shipping box wall materials showing ASTM C518 thermal conductivity k-values and per-inch R-values from VIP panels to fluted paper liners

Field note / protective mailers

Cold Shipping Boxes: R-Value Math, Wall Material Comparison, and Frozen Food Coolant Sizing

Compare cold shipping boxes by ASTM C518 thermal shipping box r value, 3D corner seam derating, and wall thickness coolant sizing for insulated boxes for shipping frozen food.

October 26, 2026

Engineering reference chart of gel packs for shipping food comparing 0 °C hydrogel and -21 °C eutectic melting plateaus, non-woven vs. poly sweat control, and packout mass ratios

Field note / insulated packaging machinery

Gel Packs for Shipping Food: Sweat Control, Non-Woven vs. Poly Pouches, and Sizing

Specify gel packs for shipping food by phase-change temperature, non woven vs poly gel pack condensation control, and how many gel packs to ship frozen food vs chilled loads.

October 26, 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

Engineering diagram of insulated bubble mailers showing VMPET/PA-bubble/LLDPE layers, ASTM F88 2-ply vs. 4-ply heat-seal integrity, and +14 to +26 °C chocolate packout sizing

Field note / protective mailers

Insulated Bubble Mailers: Metallized Film Laminates, Seal Integrity, and Chocolate Packouts

Specify insulated bubble mailers by VMPET metallized foil bubble mailer layer build, ASTM F88 side-weld vs. PSA seal integrity, and thermal bubble mailers for chocolate PCM sizing.

October 26, 2026

Cutaway diagram of a frozen food dry ice shipper showing top-down solid CO2 block placement, vented LDPE inner liner, hermetic PA/PE vacuum food pouches, and UN 1845 Class 9 label

Field note / insulated packaging machinery

Shipping Frozen Food with Dry Ice: Sublimation Sizing, Liner Venting, and UN 1845 IATA Labels

Engineer shipping frozen food with dry ice: calculate how much dry ice to ship frozen food across 24–96h, prevent CO2 liner rupture, and meet UN1845 dry ice packaging requirements.

October 26, 2026

Reflective pouch edge with a clear film extension

Field note / insulated packaging machinery

Bag Sealing Equipment for Insulated Mailers

Identify the seal interface in an insulated mailer and prepare a material compatibility trial before selecting bag sealing equipment.

October 16, 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

Reflective insulation blank held at one cut corner

Field note / protective mailers

Insulated Shipping Boxes: Liner Dimensions and Assembly Inputs

Record carton interior, liner build, payload space and closure allowance, then check an assembled sample before approving the fit.

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

White fibrous liner inside a corrugated carton

Field note / protective mailers

Insulated Protective Packaging Types and Conversion Steps

Compare insulated mailers, lined cartons and rigid containers by material construction, converting route and finished-pack checks.

October 16, 2026