Sanitary Napkin Raw Materials: Key Components and Their Functions

# Sanitary Napkin Raw Materials: Key Components and Their Functions

Introduction

Sanitary napkins are essential feminine hygiene products designed to provide comfort and protection during menstruation. The effectiveness of these products largely depends on the quality and composition of their raw materials. Understanding the key components of sanitary napkins and their functions can help consumers make informed choices.

1. Top Sheet (Cover Stock)

The top sheet is the layer that comes in direct contact with the skin. It is typically made from non-woven fabric or perforated film, which allows for quick absorption of menstrual fluid while keeping the surface dry. Key characteristics of a good top sheet include softness, breathability, and hypoallergenic properties to prevent skin irritation.

2. Absorbent Core

The absorbent core is the most critical component of a sanitary napkin. It is usually composed of a blend of fluff pulp and superabsorbent polymers (SAP). Fluff pulp provides bulk and initial absorption, while SAP can absorb and retain large amounts of liquid, preventing leakage. The efficiency of the absorbent core determines the napkin’s capacity to handle menstrual flow.

3. Back Sheet

The back sheet is the bottom layer of the sanitary napkin, designed to prevent leaks and keep moisture from seeping through to clothing. It is commonly made from polyethylene (PE) or polypropylene (PP) films, which are waterproof yet breathable. Some advanced back sheets also feature adhesive strips to secure the napkin in place.

4. Adhesive Layer

To ensure the sanitary napkin stays in position, an adhesive layer is applied to the back sheet. This layer is usually made from pressure-sensitive adhesives that are safe for skin contact. The adhesive must be strong enough to hold the napkin in place but gentle enough to avoid causing discomfort or leaving residue on underwear.

5. Release Paper

The release paper covers the adhesive layer before use. It is typically made from silicone-coated paper or plastic film, which can be easily peeled off when the napkin is ready to be used. The release paper must be durable enough to protect the adhesive during storage and handling.

6. Side Barriers (Wings)

Many sanitary napkins feature side barriers or wings that fold over the edges of underwear to provide additional protection against leaks. These wings are often made from the same materials as the top sheet and back sheet, ensuring a secure fit and enhanced comfort.

7. Fragrance and Additives

Some sanitary napkins include fragrances or additives to mask odors or provide a soothing effect. However, these components can sometimes cause irritation for individuals with sensitive skin. It’s essential to choose fragrance-free options if you have allergies or sensitivities.

Conclusion

The quality and composition of sanitary napkin raw materials play a vital role in the product’s performance, comfort, and safety. By understanding the functions of each component, consumers can select products that best meet their needs. Always opt for reputable brands that prioritize high-quality materials and hypoallergenic properties to ensure a comfortable and worry-free experience.