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# 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 film or a combination of polyethylene and non-woven fabric. This layer is impermeable to liquids, ensuring that menstrual fluid does not seep through to clothing.

### Adhesive

Adhesive is used to secure the sanitary pad in place within the underwear. It is typically a pressure-sensitive adhesive that is applied to the back sheet. The adhesive 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 comfort. These properties include:

### Softness

Softness is crucial for the top sheet to ensure comfort and prevent irritation. Non-woven fabrics and perforated films are chosen for their gentle texture.

### Absorbency

High absorbency is essential for the absorbent core to effectively manage menstrual flow. The combination of fluff pulp and SAP provides excellent absorbency and retention.

### Leakage Prevention

The back sheet must be impermeable to liquids to prevent leakage. Polyethylene films are commonly used for their excellent barrier properties.

### Adhesion

The adhesive must provide secure attachment without causing discomfort or leaving residue. Pressure-sensitive adhesives are preferred for their balance of strength and ease of removal.

## Conclusion

The raw materials used in sanitary pads are carefully selected to ensure the product’s functionality, comfort, and reliability. Understanding the composition and properties of these materials helps in appreciating the engineering behind this essential hygiene product. As technology advances, we can expect further innovations in the materials used, leading to even more effective and comfortable sanitary pads.