# Sanitary Napkin Raw Materials: Key Components and Their Functions

## Introduction

Sanitary napkins are essential feminine hygiene products used by millions of women worldwide. Understanding the raw materials that go into 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.

## Core Absorbent Layer

The core absorbent layer is the most important part of a sanitary napkin, responsible for absorbing menstrual flow. This layer typically consists of:

– Fluff pulp: A natural wood-based material that provides excellent absorbency
– Superabsorbent polymer (SAP): A synthetic material that can absorb many times its weight in liquid
– Airlaid paper: A non-woven material that helps distribute liquid evenly

## Top Sheet (Cover Stock)

The top sheet is the layer that comes in direct contact with the skin. It needs to be soft, comfortable, and allow quick liquid penetration. Common materials include:

– Polypropylene non-woven fabric
– Perforated plastic film
– Cotton or other natural fiber blends

## Back Sheet

The back sheet prevents leakage and keeps moisture from reaching clothing. It’s typically made from:

– Polyethylene film (PE)
– Breathable microporous film
– Biodegradable materials in eco-friendly products

## Adhesive Components

Several adhesive components are used in sanitary napkins:

– Pressure-sensitive adhesive: Keeps the pad in place on underwear
– Hot melt adhesive: Bonds different layers together
– Release paper: Protects the adhesive before use

## Additional Features

Modern sanitary napkins may include these extra components:

– Side barriers (wings) for better protection
– Fragrance additives (though these may cause irritation for some users)
– Natural antibacterial agents like aloe vera or tea tree oil

## Environmental Considerations

With growing environmental awareness, manufacturers are exploring:

– Biodegradable materials
– Organic cotton options
– Reduced plastic content
– Chlorine-free bleaching processes

## Conclusion

Understanding the raw materials in sanitary napkins helps consumers choose products that meet their needs for comfort, protection, and environmental impact. As technology advances, we can expect to see continued innovation in sanitary product materials and designs.