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Sanitary Napkin Raw Materials: Key Components and Their Functions

Posted: June 25, 2025 Under: News By No Comments

# Sanitary Napkin Raw Materials: Key Components and Their Functions

Sanitary Napkin Raw Materials: Key Components and Their Functions

Sanitary napkins are essential feminine hygiene products designed to provide comfort and protection during menstruation. Understanding the raw materials used in their production helps consumers make informed choices about the products they use. This article explores the key components of sanitary napkins and their respective functions.

1. Top Sheet (Cover Layer)

The top sheet is the layer that comes in direct contact with the skin. It’s typically made from:

  • Non-woven fabric (polypropylene or polyethylene)

  • Perforated plastic film

  • Cotton-like materials

This layer needs to be soft, breathable, and quick-drying to maintain comfort while allowing menstrual fluid to pass through to the absorbent core.

2. Absorbent Core

The core is the most important functional component, responsible for fluid absorption. It consists of:

  • Fluff pulp (wood cellulose)

  • Superabsorbent polymers (SAP)

  • Sometimes includes cotton or rayon fibers

The SAP can absorb many times its weight in liquid, transforming it into gel to prevent leakage and maintain dryness.

3. Back Sheet (Barrier Layer)

The back sheet prevents leakage and keeps moisture from reaching clothing. Materials include:

  • Polyethylene film

  • Breathable microporous films

  • Biodegradable materials in eco-friendly options

Modern back sheets often feature adhesive strips to keep the napkin securely in place.

4. Adhesives

Several types of adhesives are used in sanitary napkins:

  • Pressure-sensitive adhesive for attaching to underwear

  • Hot melt adhesives for bonding layers together

  • Special adhesives for wing attachments

5. Release Paper

This protective layer covers the adhesive before use and is typically made from:

  • Silicone-coated paper

  • Plastic film

It’s removed when the napkin is ready to be used.

6. Fragrance and Additives (Optional)

Some sanitary napkins include:

  • Deodorizing agents

  • Aloe vera or chamomile extracts

  • Antibacterial treatments

These additives are optional and may cause irritation for some users with sensitive skin.

Eco-Friendly Material Alternatives

With growing environmental awareness, manufacturers are developing sustainable options:

  • Organic cotton top sheets

  • Bamboo fiber absorbent cores

  • Biodegradable back sheets from corn starch

  • Chlorine-free fluff pulp

Understanding these components helps consumers choose products that align with their comfort needs, health considerations, and environmental values. The quality and combination of these materials directly affect the performance, comfort, and safety of sanitary napkins.