# 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 fabric or perforated film. The materials used must be soft, breathable, and quick-drying to ensure comfort and prevent irritation.

### 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 wood pulp and superabsorbent polymers (SAP). The wood pulp provides bulk and structure, while the 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, which is waterproof and flexible. Some back sheets may also include a breathable microporous film to enhance comfort.

### 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 keep the pad in place but gentle enough to avoid damaging the fabric of the underwear.

## 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 absorbent core must be soft to prevent skin irritation. Non-woven fabrics and perforated films are chosen for their gentle texture and breathability.

### Absorbency and Retention

The absorbent core’s materials must have high absorbency and retention properties to effectively manage menstrual flow. Superabsorbent polymers are particularly valued for their ability to absorb many times their weight in liquid.

### Leakage Prevention

The back sheet must be impermeable to liquids to prevent leakage. Polyethylene film is commonly used for its waterproof properties and durability.

### Adhesive Strength

The adhesive must provide a secure hold without causing damage to the underwear. Pressure-sensitive adhesives are preferred for their balance of strength and gentleness.

## Conclusion

Understanding the raw materials used in sanitary pads and their properties is essential for producing high-quality, comfortable, and effective products. By selecting the right materials, manufacturers can ensure that their sanitary pads meet the needs of consumers, providing both comfort and reliability during menstruation.