# 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 functionality of its raw materials. Understanding the key components and their roles can help consumers make informed choices. Below, we explore the primary materials used in sanitary napkins and their functions.

## 1. Top Sheet

The top sheet is the layer that comes into direct contact with the skin. It is typically made from non-woven fabric or perforated film, which ensures a soft and comfortable feel. The primary function of the top sheet is to allow quick absorption of menstrual fluid while keeping the surface dry. Materials like polyethylene or polypropylene are commonly used for their moisture-wicking properties.

## 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 wood pulp and superabsorbent polymers (SAP). Wood pulp provides bulk and structure, while SAP enhances the absorption capacity by turning liquid into gel. This combination ensures that the napkin can handle varying flow levels without leakage.

## 3. Back Sheet

The back sheet is the outermost layer of the sanitary napkin, designed to prevent leakage and provide a barrier against moisture. It is typically made from polyethylene or a similar waterproof material. The back sheet also ensures that the napkin stays in place by adhering to the underwear, thanks to an adhesive strip applied to its surface.

## 4. Adhesive Strip

The adhesive strip is a crucial component that secures the sanitary napkin to the underwear. It is usually made from a pressure-sensitive adhesive that is strong enough to hold the napkin in place but gentle enough to avoid damaging the fabric. Some adhesive strips are also designed to be repositionable, allowing for adjustments during use.

## 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, which allows for easy removal without leaving residue. The release paper ensures that the adhesive remains effective until the napkin is ready to be used.

## 6. Fragrance and Additives

Some sanitary napkins include fragrances or additives to mask odors or provide additional comfort. These components are usually applied to the top sheet or absorbent core. However, it’s important to note that fragrances can sometimes cause irritation for individuals with sensitive skin, 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 to the adhesive strip, each component is carefully designed to meet the needs of users. By understanding these materials and their functions, consumers can choose products that best suit their preferences and requirements. Whether prioritizing absorption, comfort, or skin sensitivity, there is a sanitary napkin designed to meet every need.