Sanitary Napkins Raw Material Composition and Properties

# Sanitary Napkins Raw Material Composition and Properties

Sanitary napkins are essential personal hygiene products used by women during menstruation. Understanding the raw materials and their properties is crucial for ensuring comfort, safety, and effectiveness. This article delves into the composition and properties of the raw materials used in sanitary napkins.

## Core Components of Sanitary Napkins

The primary components of sanitary napkins 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 of the product.

### 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 hypoallergenic to prevent irritation and ensure comfort.

### Absorbent Core

The absorbent core is the most critical part of the sanitary napkin, responsible for absorbing 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 absorption capacity and retention.

### Back Sheet

The back sheet is the outermost layer that prevents leakage. It is commonly made from polyethylene film, which is waterproof and flexible. This layer must be durable and resistant to tearing to maintain the integrity of the napkin during use.

### Adhesive

Adhesive is used to secure the sanitary napkin to the underwear. It is typically a pressure-sensitive adhesive that provides a strong yet gentle hold. The adhesive must be skin-friendly and easy to remove without leaving residue.

## Properties of Raw Materials

The properties of the raw materials used in sanitary napkins are carefully selected to meet the needs of users. These properties include absorbency, softness, breathability, and hypoallergenic qualities.

### Absorbency

High absorbency is crucial for the effectiveness of sanitary napkins. The combination of wood pulp and SAP in the absorbent core ensures rapid absorption and retention of menstrual fluid, preventing leaks and providing long-lasting protection.

### Softness

Softness is essential for user comfort. The top sheet and other materials in contact with the skin must be gentle to prevent irritation and chafing. Non-woven fabrics and perforated films are chosen for their soft and smooth texture.

### Breathability

Breathability is important to maintain skin health and comfort. Materials that allow air circulation help reduce moisture buildup and prevent discomfort or skin issues. The top sheet and back sheet are designed to be breathable while still providing effective protection.

### Hypoallergenic Qualities

Hypoallergenic materials are used to minimize the risk of allergic reactions. The raw materials are tested to ensure they are free from harmful chemicals and irritants, making them safe for sensitive skin.

## Conclusion

The composition and properties of the raw materials used in sanitary napkins are carefully selected to ensure comfort, safety, and effectiveness. By understanding these components, manufacturers can produce high-quality products that meet the needs of users, providing reliable protection and comfort during menstruation.