# Sanitary Napkins Raw Material: Key Components and Their Functions

Sanitary napkins are essential personal care products designed to provide comfort and hygiene during menstruation. The effectiveness of a sanitary napkin largely depends on the quality and composition of its raw materials. Understanding the key components and their functions can help consumers make informed choices. Below, we explore the primary materials used in sanitary napkins and their roles.

## 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 allow quick absorption of menstrual fluid while keeping the surface dry and comfortable. Materials like polyethylene or polypropylene are commonly used due to their softness and breathability.

## 2. Absorbent Core

The absorbent core is the heart of the sanitary napkin, responsible for retaining menstrual fluid. It is usually composed of a blend of fluff pulp and superabsorbent polymers (SAP). Fluff pulp provides bulk and helps distribute the fluid evenly, while SAP can absorb and lock in large amounts of liquid, preventing leakage. The combination of these materials ensures maximum absorption and comfort.

## 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 thin, flexible plastic film, often polyethylene. The back sheet must be impermeable to liquids while remaining breathable to reduce the risk of skin irritation and discomfort.

## 4. Adhesive Strips

Adhesive strips are crucial for keeping the sanitary napkin securely in place. These strips are usually made from a pressure-sensitive adhesive that sticks to the underwear without leaving residue. The adhesive must be strong enough to hold the napkin in position during movement but gentle enough to be removed easily without damaging the fabric.

## 5. Release Paper

Release paper is a protective layer that covers the adhesive strips before use. It is typically made from silicone-coated paper or film. The release paper ensures that the adhesive remains effective until the napkin is ready to be used. Once removed, the adhesive is exposed, allowing the napkin to be securely attached to the underwear.

## 6. Fragrance and Additives

Some sanitary napkins include fragrances or additives to provide a fresh scent or additional comfort. However, these components can sometimes cause irritation or allergic reactions in sensitive individuals. It is essential to choose products that are free from unnecessary additives if you have sensitive skin.

## Conclusion

The raw materials used in sanitary napkins play a vital role in their performance and comfort. From the top sheet to the adhesive strips, each component has a specific function that contributes to the overall effectiveness of the product. By understanding these materials and their roles, consumers can make better-informed decisions and choose sanitary napkins that best meet their needs.