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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 absorbent core, top sheet, back sheet, and adhesive. Each of these components is made from specific 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 wood pulp and superabsorbent polymers (SAP). Wood pulp provides bulk and structure, while SAP enhances the pad’s ability to absorb and lock in moisture.

### 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, keeping the user dry and comfortable.

### 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. These materials are 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 safe for skin contact. The adhesive must be strong enough to keep the pad in place but also easy to remove 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.

### Absorbency

High absorbency is crucial for the absorbent core to effectively manage menstrual flow. The combination of wood pulp and SAP provides a balance of quick absorption and long-term retention.

### Softness and Comfort

The top sheet must be soft and gentle on the skin to prevent irritation. Non-woven fabrics and perforated films are chosen for their smooth texture and breathability.

### Leakage Protection

The back sheet must be impermeable to liquids to prevent leaks. Polyethylene and polypropylene films are ideal for this purpose due to their water-resistant properties.

### Adhesive Strength

The adhesive must provide a secure hold without causing discomfort or skin irritation. Pressure-sensitive adhesives are designed to be gentle on the skin while maintaining a strong bond.

## Conclusion

Understanding the raw material composition and properties of sanitary pads is essential for ensuring their effectiveness and user comfort. By selecting the right materials, manufacturers can produce sanitary pads that meet the needs of women worldwide, providing reliable protection and comfort during menstruation.