Sanitary napkins are usually made of several functional layers. Each layer has a specific job: touching the skin, absorbing fluid, spreading liquid, locking moisture, preventing leakage, holding the product in place, and protecting it before use.

A finished sanitary napkin may look simple, but it is actually a layered hygiene product. Material choice and machine processing both affect softness, absorption, comfort, leakage protection, and appearance.

The Top Sheet

The top sheet is the layer that touches the skin. It is usually made from nonwoven fabric or other soft surface materials. Its job is to let liquid pass through quickly while keeping the surface as dry and comfortable as possible.

A good top sheet should feel soft, reduce irritation, and work well with the absorbent core below it. If the surface is too rough, too slow to absorb, or poorly bonded, the user experience may decline.

For manufacturers, top sheet material must also run smoothly through production equipment without excessive tension, wrinkling, or misalignment.

The Absorbent Core

The absorbent core is the main liquid-holding part of the sanitary napkin. It may include pulp, SAP sheet, absorbent paper, or other absorbent materials depending on the product design.

The core needs to absorb quickly and hold fluid under pressure. It should also keep a stable shape during movement. If the core breaks, shifts, or clumps, the product may feel uncomfortable and may leak.

Our Diaper And Sanitary Pad Making Machine is designed for sanitary product core processing, supporting material conveying, folding, stacking, and related production requirements.

Acquisition and Distribution Layers

Some sanitary napkins include an acquisition or distribution layer. This layer helps guide liquid away from the surface and spread it across the core more evenly.

Without good distribution, liquid may stay in one area and cause leakage even when the total absorbent capacity is still enough.

This layer is especially important for thin, fast-absorbing, or higher-performance sanitary napkins.

Back Sheet and Leak Protection

The back sheet is usually a film or breathable waterproof layer. Its job is to prevent liquid from leaking through to underwear.

A good back sheet should block leakage while keeping the product flexible and comfortable. Some products may use printed film or breathable film depending on market positioning.

The back sheet must be laminated or bonded correctly with other materials. Poor lamination can cause separation, wrinkles, or weak edges.

Adhesive and Release Paper

Adhesive helps fix the sanitary napkin to underwear. Release paper protects the adhesive before use and is peeled off during application.

If the adhesive is too weak, the product may shift. If it is too strong, it may damage fabric or feel inconvenient to remove. If release paper is poorly matched, users may find it difficult to peel.

These details seem small, but they directly affect daily use.

Wings and Side Protection

Many sanitary napkins include wings. Wings wrap around the underwear to help keep the product in position and reduce side leakage.

Wing shape, folding accuracy, adhesive placement, and cutting precision all affect the final appearance and function.

In production, folding and alignment must be stable. Small errors can lead to uneven wings, poor packaging appearance, or higher rejection rates.

Packaging Materials

Individual wrappers and outer bags protect sanitary napkins from dust, moisture, and contamination. Packaging also carries product information, shelf life, size, brand design, and batch details.

For retail products, packaging quality affects shelf presentation. For hygiene products, it also protects cleanliness and storage performance.

A good sanitary napkin is not complete until it is properly wrapped and packed.

Why Laminating Matters

Many sanitary napkin materials need to be combined into stable layered structures. Laminating helps join nonwoven fabric, absorbent materials, film, and other substrates according to the product design.

Our Automatic Laminating Machine can support the compounding of nonwoven fabrics and sanitary napkin core materials, helping improve absorption structure, comfort, and material stability.

For buyers building sanitary product production lines, the laminating process should match material type, web width, speed, tension control, and finished product requirements.

Our Equipment Supply Perspective

We focus on intelligent equipment for flexible packaging and hygiene material production. Our product categories include sanitary pad making machines, Laminating Machines, Slitting Machines, Embossing Machines, Diaper Making Machines, casting machines, and rewinding machines.

For sanitary napkin production, buyers can discuss material structure, SAP sheet width, folding method, production speed, dust removal, stacking, packaging, and OEM or ODM equipment requirements.

Stable equipment helps turn raw materials into consistent hygiene products.

Simple Answer

Sanitary napkins are commonly made of a soft top sheet, absorbent core, distribution layer, waterproof back sheet, adhesive, release paper, wings, and protective packaging.

The final product quality depends on both material selection and production equipment control.

Request a Sanitary Napkin Material Processing Plan

Send us your product structure, material layers, core width, target speed, folding requirement, lamination need, and packaging plan. Our team can recommend suitable equipment for sanitary napkin material processing and production.