# Sanitary Pads Raw Material Composition and Properties

Sanitary pads are essential personal care products designed to provide comfort and hygiene during menstruation. Understanding the raw materials used in their production is crucial for both manufacturers and consumers. This article delves into the composition and properties of the raw materials commonly 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 layers. 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 menstrual fluid. It is typically made from a combination of wood pulp and superabsorbent polymers (SAP). Wood pulp provides bulk and structure, while SAP enhances the pad’s ability to retain liquid.

### Top Sheet

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

### 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 waterproof yet breathable. This layer ensures that the pad remains discreet and comfortable during use.

### Adhesive Layers

Adhesive layers are used to secure the pad to the underwear. These layers are typically made from pressure-sensitive adhesives that provide a strong yet gentle hold. The adhesives are formulated to be skin-friendly and easy to remove without leaving residue.

## Properties of Raw Materials

The raw materials used in sanitary pads are selected based on several key properties:

### Absorbency

High absorbency is crucial for the effective performance of sanitary pads. The combination of wood pulp and SAP ensures that the pad can handle varying levels of menstrual flow without leakage.

### Softness

Softness is essential for user comfort. Non-woven fabrics and perforated films used in the top sheet are designed to be gentle on the skin, reducing the risk of irritation.

### Breathability

Breathability helps to maintain a healthy environment by allowing air to circulate. Polyethylene and polypropylene films used in the back sheet are engineered to be both waterproof and breathable.

### Adhesion

Effective adhesion ensures that the pad stays in place during use. Pressure-sensitive adhesives are formulated to provide a secure hold without causing discomfort or leaving residue on clothing.

## Conclusion

The raw materials used in sanitary pads are carefully selected to provide optimal performance, comfort, and hygiene. By understanding the composition and properties of these materials, consumers can make informed choices, and manufacturers can continue to innovate and improve their products.