# Sanitary Napkins Raw Material: Key Components and Their Functions

Sanitary napkins are essential personal care products designed to provide comfort and hygiene during menstruation. Understanding the raw materials used in their production is crucial for appreciating their functionality and effectiveness. This article delves into the key components of sanitary napkins and their respective functions.

## 1. Absorbent Core

The absorbent core is the heart of a sanitary napkin, responsible for absorbing menstrual fluid. It is typically made from a blend of wood pulp and superabsorbent polymers (SAP). The wood pulp provides bulk and structure, while SAP enhances the absorbency, ensuring that the napkin can hold a significant amount of fluid without leaking.

## 2. Top Sheet

The top sheet is the layer that comes into direct contact with the skin. It is usually made from a non-woven fabric or perforated film that is soft, breathable, and quick-drying. The primary function of the top sheet is to allow menstrual fluid to pass through to the absorbent core while keeping the skin dry and comfortable.

## 3. Back Sheet

The back sheet is the outermost layer of the sanitary napkin, designed to prevent leakage and provide a barrier against external moisture. It is typically made from a polyethylene film or a breathable microporous film. The back sheet ensures that the menstrual fluid is contained within the napkin, preventing stains on clothing.

## 4. Adhesive

Adhesive is applied to the back sheet to secure the sanitary napkin in place within the underwear. This adhesive is usually a pressure-sensitive type that is strong enough to hold the napkin in position but gentle enough to be removed without leaving residue on clothing.

## 5. Release Paper

Release paper is a protective layer that covers the adhesive before the sanitary napkin is used. It is typically made from silicone-coated paper or film. The release paper is peeled off to expose the adhesive, allowing the napkin to be securely attached to the underwear.

## 6. Fragrance and Additives

Some sanitary napkins include fragrance or additives to provide a pleasant scent or additional comfort. These components are carefully selected to ensure they are safe for skin contact and do not cause irritation. However, it’s important to note that not all sanitary napkins contain fragrances, as some users may prefer fragrance-free options.

## Conclusion

The raw materials used in sanitary napkins are carefully chosen to ensure optimal performance, comfort, and hygiene. Each component plays a vital role in the overall functionality of the product, from the absorbent core that manages menstrual flow to the adhesive that keeps the napkin securely in place. Understanding these materials helps consumers make informed choices and appreciate the technology behind this essential personal care product.