Evizda

# 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 and appreciate the technology behind these everyday products.

## 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 polypropylene or polyethylene are commonly used due to their softness and ability to wick moisture away from the skin.

## 2. Absorbent Core

The absorbent core is the heart of the sanitary napkin, responsible for retaining menstrual fluid. This layer is usually composed of a blend of fluff pulp and superabsorbent polymers (SAP). Fluff pulp provides bulk and helps in the even distribution of the fluid, while SAPs are highly effective in locking in moisture, preventing leakage and ensuring long-lasting dryness.

## 3. Back Sheet

The back sheet is the outermost layer of the sanitary napkin, designed to prevent any leakage. It is typically made from a waterproof material such as polyethylene film. This layer not only provides a barrier against fluid escape but also ensures that the napkin stays in place, thanks to its adhesive properties. Some back sheets are also breathable, allowing air circulation to enhance comfort.

## 4. Adhesive Strip

The adhesive strip is a crucial component that secures the sanitary napkin in place within the underwear. It is usually made from a pressure-sensitive adhesive that is strong enough to hold the napkin securely but gentle enough to be removed without leaving residue. This strip ensures that the napkin stays in position, providing confidence and preventing any movement that could lead to discomfort or leakage.

## 5. Release Paper

The release paper is a protective layer that covers the adhesive strip before use. It is typically made from silicone-coated paper or film. The primary function of the release paper is to keep the adhesive clean and effective until the napkin is ready to be used. Once removed, the adhesive strip is exposed, allowing the napkin to be securely attached to the underwear.

## 6. Fragrance and Additives

Some sanitary napkins include fragrance or other additives to provide a fresh scent or additional comfort. These components are usually added in minimal amounts and are designed to be skin-friendly. However, it’s important to note that some individuals may be sensitive to these additives, so fragrance-free options are also widely available.

## Conclusion

The raw materials used in sanitary napkins play a vital role in their performance and comfort. From the top sheet that ensures a dry surface to the absorbent core that locks in moisture, each component has a specific function that contributes to the overall effectiveness of the product. By understanding these key components, consumers can make better choices and appreciate the intricate design that goes into creating a reliable and comfortable sanitary napkin.