# 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 primary raw materials used in sanitary pads.

## 1. Absorbent Core

The absorbent core is the heart of a sanitary pad, responsible for absorbing menstrual fluid. It is typically made from a blend of wood pulp and superabsorbent polymers (SAP).

– Wood Pulp: This natural material is highly absorbent and provides a soft texture. It is often bleached to ensure cleanliness and hygiene.
– Superabsorbent Polymers (SAP): These synthetic materials can absorb and retain large amounts of liquid relative to their mass. SAP enhances the pad’s absorbency and prevents leakage.

## 2. Top Sheet

The top sheet is the layer that comes into direct contact with the skin. It is designed to be soft, comfortable, and quick-drying.

– Nonwoven Fabric: Commonly made from polypropylene or polyethylene, nonwoven fabrics are lightweight, breathable, and gentle on the skin. They allow for rapid liquid transfer to the absorbent core while keeping the surface dry.

## 3. Back Sheet

The back sheet is the outermost layer of the sanitary pad, providing a barrier to prevent leakage.

– Polyethylene Film: This material is waterproof and flexible, ensuring that menstrual fluid does not seep through to clothing. It is also breathable to some extent, allowing for air circulation and reducing the risk of skin irritation.

## 4. Adhesive

Adhesives are used to secure the sanitary pad in place within the underwear.

– Pressure-Sensitive Adhesive: This type of adhesive is applied to the back sheet and activates upon pressure. It provides a strong yet removable bond, ensuring the pad stays in place without causing discomfort or leaving residue.

## 5. Release Paper

Release paper is a protective layer that covers the adhesive before use.

– Silicone-Coated Paper: This paper is easy to peel off and ensures that the adhesive remains intact until the pad is ready to be used.

## 6. Fragrance and Additives

Some sanitary pads include fragrances and additives to enhance user experience.

– Fragrance: Added to mask odors, fragrances are typically mild and hypoallergenic to minimize the risk of skin irritation.
– Additives: These may include aloe vera or chamomile extracts, which provide soothing properties and additional comfort.

## Conclusion

The raw materials used in sanitary pads are carefully selected to ensure optimal performance, comfort, and hygiene. From the absorbent core to the back sheet, each component plays a vital role in the overall functionality of the product. Understanding these materials helps consumers make informed choices and appreciate the engineering behind this essential personal care item.