Sanitary Napkins Raw Material Composition and Properties

# Sanitary Napkins Raw Material Composition and Properties

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

## 1. Absorbent Core

The absorbent core is the heart of a sanitary napkin, responsible for absorbing menstrual fluid. It is typically made from a combination of:

– **Wood Pulp**: Provides high absorbency and is biodegradable.
– **Super Absorbent Polymer (SAP)**: Enhances the absorbent capacity by locking in moisture.

### Properties:
– **High Absorbency**: Ensures effective fluid retention.
– **Softness**: Provides comfort during use.
– **Biodegradability**: Environmentally friendly option.

## 2. Top Sheet

The top sheet is the layer that comes into direct contact with the skin. It is usually made from:

– **Non-woven Fabric**: Offers a soft and smooth surface.
– **Perforated Film**: Allows quick absorption of fluids.

### Properties:
– **Softness**: Ensures comfort and prevents irritation.
– **Breathability**: Allows air circulation, reducing the risk of skin irritation.
– **Quick Absorption**: Facilitates rapid fluid transfer to the absorbent core.

## 3. Back Sheet

The back sheet is the outermost layer that prevents leakage. It is commonly made from:

– **Polyethylene Film**: Provides a waterproof barrier.
– **Breathable Film**: Combines waterproofing with breathability.

### Properties:
– **Waterproof**: Prevents leakage and keeps clothing dry.
– **Flexibility**: Ensures the napkin conforms to the body’s shape.
– **Durability**: Maintains integrity during use.

## 4. Adhesive

Adhesives are used to secure the sanitary napkin in place. They are typically made from:

– **Hot Melt Adhesive**: Provides strong and reliable adhesion.
– **Pressure-sensitive Adhesive**: Ensures easy application and removal.

### Properties:
– **Strong Adhesion**: Keeps the napkin securely in place.
– **Skin-friendly**: Minimizes the risk of skin irritation.
– **Easy Removal**: Allows for clean and painless removal.

## 5. Release Paper

Release paper is used to protect the adhesive before use. It is usually made from:

– **Silicone-coated Paper**: Ensures easy release from the adhesive.

### Properties:
– **Non-stick Surface**: Facilitates easy removal.
– **Durability**: Protects the adhesive until use.

## Conclusion

Understanding the raw materials used in sanitary napkins and their properties is essential for ensuring the product’s effectiveness and user comfort. From the absorbent core to the release paper, each component plays a vital role in providing a safe, comfortable, and reliable menstrual hygiene solution.