# 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 top sheet, absorbent core, back sheet, and adhesive. Each of these components is made from specific materials that contribute to the overall functionality and comfort of the pad.

### Top Sheet

The top sheet is the layer that comes into direct contact with the skin. It is typically made from non-woven fabrics or perforated films. These materials are chosen for their softness, breathability, and ability to quickly wick moisture away from the skin.

### Absorbent Core

The absorbent core is the heart of the sanitary pad, 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 structure, while SAP enhances the pad’s absorbency and retention capabilities.

### Back Sheet

The back sheet is the outermost layer of the sanitary pad, designed to prevent leakage. It is commonly made from polyethylene or polypropylene films, which are impermeable to liquids but allow for breathability. Some back sheets also feature a cloth-like texture for added comfort.

### Adhesive

Adhesives are used to secure the sanitary pad in place within the underwear. These adhesives are typically pressure-sensitive and are applied to the back sheet. They must be strong enough to hold the pad in place but gentle enough to be easily removed without leaving residue.

## Properties of Raw Materials

The raw materials used in sanitary pads 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 cloth-like films are preferred for their soft texture.

### Absorbency and Retention

The absorbent core must have high absorbency and retention properties to effectively manage menstrual flow. The combination of fluff pulp and SAP ensures that the pad can absorb large volumes of fluid and retain it without leakage.

### Breathability

Breathability is crucial 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 odor.

### Leakage Prevention

The back sheet and adhesive must work together to prevent leakage. The impermeable nature of the back sheet, combined with the secure hold of the adhesive, ensures that the pad stays in place and protects against leaks.

## Conclusion

The raw materials used in sanitary pads are carefully selected to provide optimal performance and comfort. From the soft top sheet to the highly absorbent core and leak-proof back sheet, each component plays a vital role in ensuring the effectiveness of the product. Understanding these materials and their properties can help consumers make informed choices and appreciate the engineering behind this essential hygiene product.