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The panty liner production process converts rolls and absorbent components into individually wrapped products through a controlled sequence of material preparation, web handling, core placement, lamination, adhesive coating, die cutting, folding, inspection, and packaging. Product consistency depends on controlling the interfaces between these steps, not only on buying high-grade raw materials.
| Stage | Main output | Critical control |
|---|---|---|
| Supplier qualification | Approved material specification | Identity, change notification, certificates, lot consistency |
| Material receiving | Released rolls and components | Basis weight, width, defects, storage, traceability |
| Web preparation | Stable running materials | Tension, alignment, splicing, static control |
| Core and layer assembly | Continuous absorbent laminate | Core weight, SAP distribution, registration, bonding |
| Adhesive and release | Fixation system | Coat weight, pattern, temperature, clean removal |
| Cutting and wrapping | Finished unit | Dimensions, cut quality, fold, seal, coding |
| Final packing | Saleable pack and carton | Count, artwork, seal, barcode, lot code |
Every material should have an approved specification and controlled supplier. For nonwovens, factories may verify basis weight, width, tensile properties, softness or hand feel, hydrophilicity, and visual cleanliness. Films require thickness, barrier, printing, and winding checks. Adhesives need identity, viscosity or application window, odor, ageing, and substrate-compatibility review. Pulp, airlaid, tissue, and SAP require lot control and storage protection from humidity.
Substitution is a major source of hidden variation. A factory should not replace a topsheet, film, or adhesive solely because the nominal description is similar. The replacement must pass change control and performance verification.
Temperature and humidity can affect paper, release materials, static charge, film handling, and adhesive. Rolls should be conditioned when necessary, and the line should be cleared of previous artwork and materials. Setup records define machine speed, tension, glue temperature, registration, die position, sealing conditions, and inspection frequency.
The line combines the topsheet, acquisition or distribution layer, absorbent core, and backsheet. Core materials may arrive as rolls or be formed inline. The process must control the mass per product and the position of the core relative to the cut shape. Embossing or bonding stabilizes the laminate while preserving fluid pathways.
Online weight or vision systems can reduce risk, but they do not eliminate physical sampling. Sensors require calibration, challenge tests, and documented response when they detect a defect.
Construction adhesive bonds internal layers; garment adhesive attaches the liner to underwear. Each has a different job. Application temperature, coat weight, pattern, start-stop accuracy, and nozzle condition must be monitored. Release paper or film is applied without wrinkles and should peel consistently without transferring adhesive.
A rotary die defines the profile. Dull blades can produce fibres, rough edges, or dimensional drift. After cutting, the liner may be folded and placed into an individual wrapper. Wrapper registration, seal temperature, dwell time, and cut-off determine whether the unit opens cleanly and remains protected.
Vision systems can detect missing cores, skewed release paper, shape defects, contamination, incorrect printing, or poor folding. Reject systems should be verified at startup and during the run. Manual inspections still check tactile or functional defects that cameras may not identify, such as excessive stiffness or adhesive residue.
Finished products are held until required tests and documentation are complete. Release may include appearance, dimensions, weight, thickness, strike-through, wetback, retention, adhesive, package seal, count, coding, and microbiological controls where applicable. Retained samples support complaint investigations and shelf-life review.
A carton code should connect to the production line, shift, date, raw-material lots, inspection records, and shipment. This allows targeted investigation instead of broad recall. Traceability also supports buyer audits, change management, and repeat orders.
BI-Ehealthcare provides OEM/ODM production support across feminine hygiene categories. Its company profile outlines manufacturing and quality capabilities, while available panty liner formats can be used as the starting point for custom development.
Common materials include nonwoven or cotton-contact topsheets, tissue or airlaid cores, cellulose and/or SAP, barrier films, hot-melt adhesives, release paper, wrappers, bags, and cartons.
There is no single control. Core placement, web alignment, adhesive application, cutting, wrapping, and lot traceability must work together.
Factories use online sensors, vision inspection, reject mechanisms, operator checks, and batch sampling according to the control plan.
Some factories print or convert packaging internally; others use approved suppliers. The buyer should verify artwork control, incoming inspection, and traceability in either case.
They provide a reference for complaints, stability checks, lot comparison, and investigation of reported defects.
BI-Ehealthcare supports OEM and ODM feminine hygiene projects covering material selection, absorbency design, sample development, packaging, quality control and export coordination. Contact BI-Ehealthcare with your target market, size, absorbency, pack count and expected order volume.
