# 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 thin, flexible plastic film that is impermeable to liquids. Some back sheets are also breathable, allowing air to circulate while still preventing leaks.

### Adhesive

Adhesive is used to secure the sanitary pad to the underwear. It is typically a pressure-sensitive adhesive that is applied to the back sheet. The adhesive must be strong enough to keep the pad in place but also easy to remove without leaving residue on the underwear.

## Properties of Raw Materials

The raw materials used in sanitary pads must possess specific properties to ensure the product’s effectiveness and comfort. These properties include absorbency, softness, flexibility, and breathability.

### Absorbency

Absorbency is the most critical property of the absorbent core. The combination of fluff pulp and SAP ensures that the pad can quickly absorb and retain menstrual fluid, preventing leaks and keeping the user dry.

### Softness

Softness is essential for the top sheet, as it directly contacts the skin. Non-woven fabrics and perforated films are chosen for their soft texture, which minimizes irritation and discomfort.

### Flexibility

Flexibility is important for both the top sheet and back sheet. The materials must be able to conform to the body’s shape, providing a comfortable fit and preventing bunching or shifting during use.

### Breathability

Breathability is a key property for the back sheet. A breathable back sheet allows air to circulate, reducing the risk of skin irritation and discomfort. This is particularly important for users who wear sanitary pads for extended periods.

## Conclusion

The raw materials used in sanitary pads are carefully selected to ensure the product’s effectiveness, comfort, and safety. From the absorbent core to the adhesive, each component plays a vital role in providing a reliable and comfortable hygiene solution. Understanding the composition and properties of these materials can help consumers make informed choices and appreciate the technology behind this essential product.