Sanitary Pads Raw Material Composition and Properties

# Sanitary Pads Raw Material Composition and Properties

Sanitary pads are essential hygiene products used by millions of women worldwide. Understanding the raw materials that go into their production is crucial for both manufacturers and consumers. This article delves into the composition and properties of the raw materials used in sanitary pads.

## Core Components of Sanitary Pads

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

### Absorbent Core

The absorbent core is the heart of the sanitary pad, responsible for absorbing and retaining menstrual fluid. It is typically made from a combination of fluff pulp and superabsorbent polymers (SAP). Fluff pulp is a highly absorbent material derived from wood fibers, while SAP is a synthetic polymer that can absorb many times its weight in liquid.

### Top Sheet

The top sheet is the layer that comes into direct contact with the skin. It is designed to be soft, comfortable, and quick-drying. Common materials used for the top sheet include non-woven fabrics, perforated films, and apertured films. These materials are chosen for their ability to wick moisture away from the skin, keeping the user dry and comfortable.

### Back Sheet

The back sheet is the outermost layer of the sanitary pad, providing a barrier to prevent leakage. It is usually made from a waterproof material such as polyethylene or polypropylene. These materials are lightweight, flexible, and impermeable to liquids, ensuring that the pad remains leak-proof.

### Adhesive

Adhesive is used to secure the sanitary pad in place within the underwear. The adhesive must be strong enough to hold the pad securely but gentle enough to be easily removed without leaving residue. Common adhesives used include hot melt adhesives and pressure-sensitive adhesives.

## Properties of Raw Materials

The raw materials used in sanitary pads are selected based on their specific properties, which contribute to the overall performance of the product.

### Absorbency

The absorbent core materials, particularly SAP, are chosen for their high absorbency. SAP can absorb and retain large amounts of liquid, preventing leakage and ensuring long-lasting protection.

### Softness and Comfort

The top sheet materials are selected for their softness and comfort. Non-woven fabrics and perforated films are designed to be gentle on the skin, reducing the risk of irritation and discomfort.

### Leakage Prevention

The back sheet materials are chosen for their ability to prevent leakage. Polyethylene and polypropylene are impermeable to liquids, providing a reliable barrier against leaks.

### Adhesive Strength

The adhesive used must strike a balance between strength and ease of removal. Hot melt adhesives and pressure-sensitive adhesives are formulated to provide secure attachment without causing damage to clothing or skin.

## Conclusion

The raw materials used in sanitary pads are carefully selected to ensure optimal performance, comfort, and protection. From the absorbent core to the adhesive, each component plays a crucial role in the overall functionality of the pad. Understanding the composition and properties of these materials can help consumers make informed choices and manufacturers improve product quality.