Sanitary Napkins Raw Material Composition and Properties

# Sanitary Napkins Raw Material Composition and Properties

Sanitary napkins are essential hygiene products used by women during menstruation. Understanding the raw materials used in their production and their properties is crucial for ensuring comfort, safety, and effectiveness. This article delves into the composition and properties of the raw materials commonly used in sanitary napkins.

## Core Components of Sanitary Napkins

The primary components of sanitary napkins include the top sheet, absorbent core, back sheet, and adhesive. Each of these components is made from specific materials that contribute to the overall functionality of the product.

### 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. The materials used for the top sheet are chosen for their softness, breathability, and ability to quickly transfer moisture to the absorbent core.

### Absorbent Core

The absorbent core is the most critical part of the sanitary napkin, responsible for absorbing and retaining menstrual fluid. It is usually composed of a blend of fluff pulp and superabsorbent polymers (SAP). Fluff pulp provides bulk and absorbency, while SAP enhances the capacity to retain liquid, preventing leakage.

### 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 commonly made from polyethylene film or a combination of non-woven fabric and film. The back sheet must be impermeable to liquids while remaining flexible and comfortable.

### Adhesive

Adhesive is used to secure the sanitary napkin to the underwear. It is typically a pressure-sensitive adhesive that provides a strong bond without causing irritation or leaving residue on clothing.

## Properties of Raw Materials

The raw materials used in sanitary napkins must possess specific properties to ensure the product’s effectiveness and user comfort.

### Softness and Comfort

Materials used in the top sheet and back sheet must be soft and gentle on the skin to prevent irritation and discomfort. Non-woven fabrics and perforated films are chosen for their smooth texture and breathability.

### Absorbency and Retention

The absorbent core must have high absorbency and retention capabilities to effectively manage menstrual flow. Fluff pulp and SAP work together to provide rapid absorption and long-lasting dryness.

### Leakage Prevention

The back sheet and adhesive must work in tandem to prevent leakage. The back sheet’s impermeability and the adhesive’s strong bond ensure that the sanitary napkin stays in place and provides reliable protection.

### Breathability

Breathability is essential to prevent moisture buildup and maintain skin health. The top sheet and back sheet materials are designed to allow air circulation, reducing the risk of irritation and discomfort.

## Conclusion

The composition and properties of raw materials used in sanitary napkins play a vital role in their performance and user satisfaction. By understanding these components, manufacturers can produce high-quality products that meet the needs of women worldwide. Ensuring the right balance of softness, absorbency, leakage prevention, and breathability is key to creating effective and comfortable sanitary napkins.