# Sanitary Napkins Raw Material: Key Components and Their Functions

Sanitary napkins are essential hygiene products used by millions of women worldwide. Understanding the raw materials that go into their production is crucial for ensuring quality, comfort, and safety. Below, we explore the key components of sanitary napkins and their respective functions.

## 1. Top Sheet

The top sheet is the layer that comes into direct contact with the skin. It is typically made from a non-woven fabric or a perforated film. The primary function of the top sheet is to provide a soft, dry, and comfortable surface while allowing menstrual fluid to pass through quickly.

## 2. Absorbent Core

The absorbent core is the heart of the sanitary napkin. It is usually composed of a blend of wood pulp and superabsorbent polymers (SAP). The wood pulp provides bulk and helps distribute the fluid evenly, while the SAP locks in moisture, preventing leaks and ensuring long-lasting dryness.

## 3. Back Sheet

The back sheet is the outermost layer of the sanitary napkin, designed to prevent leakage. It is typically made from a polyethylene film or a breathable material that allows air to circulate while keeping moisture out. The back sheet also provides a barrier against external contaminants.

## 4. Adhesive Strip

The adhesive strip is located on the underside of the back sheet. Its primary function is to secure the sanitary napkin in place within the underwear. The adhesive is usually pressure-sensitive, ensuring it stays in place during movement without causing discomfort.

## 5. Release Paper

The release paper covers the adhesive strip before use. It is designed to be easily removed, allowing the sanitary napkin to be positioned correctly. The release paper is typically made from silicone-coated paper or film, ensuring smooth removal without leaving residue.

## 6. Wings (Optional)

Some sanitary napkins come with wings, which are additional flaps on the sides. These wings fold over the edges of the underwear, providing extra security and preventing side leaks. Wings are often made from the same material as the top sheet or back sheet.

## 7. Fragrance and Additives (Optional)

Certain sanitary napkins include fragrances or additives to mask odors or provide additional comfort. However, these components are optional and may not be suitable for all users, especially those with sensitive skin or allergies.

## Conclusion

The raw materials used in sanitary napkins play a vital role in their overall performance and user experience. From the top sheet to the adhesive strip, each component is carefully designed to ensure comfort, absorbency, and leak protection. Understanding these materials can help consumers make informed choices and appreciate the engineering behind this essential hygiene product.