Sanitary Napkins Raw Material Composition and Properties

。

# Sanitary Napkins Raw Material Composition and Properties

Sanitary napkins are essential hygiene products used by women worldwide. Understanding the raw materials that go into their production is crucial for ensuring quality, comfort, and safety. This article delves into the composition and properties of the primary materials used in sanitary napkins.

## 1. Absorbent Core

The absorbent core is the heart of a sanitary napkin, responsible for absorbing menstrual fluid. It is typically made from a blend of wood pulp and superabsorbent polymers (SAP). Wood pulp provides bulk and structure, while SAP enhances the absorbency by locking in moisture.

### Properties:

– High Absorbency: The core can hold several times its weight in liquid.
– Softness: Ensures comfort during use.
– Quick Absorption: Prevents leakage by rapidly absorbing fluid.

## 2. 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. The material is chosen for its softness and ability to allow fluid to pass through quickly.

### Properties:

– Soft and Smooth: Prevents irritation and discomfort.
– Breathable: Allows air circulation, reducing the risk of rashes.
– Hydrophilic: Facilitates quick fluid transfer to the absorbent core.

## 3. Back Sheet

The back sheet is the outermost layer of the sanitary napkin, designed to prevent leakage. It is typically made from polyethylene or polypropylene films, which are waterproof yet breathable.

### Properties:

– Waterproof: Prevents leakage and keeps clothing dry.
– Breathable: Reduces moisture buildup, enhancing comfort.
– Durable: Withstands wear and tear during use.

## 4. Adhesive

Adhesives are used to secure the sanitary napkin to the underwear. They are usually pressure-sensitive adhesives that provide a strong yet gentle hold.

### Properties:

– Strong Adhesion: Ensures the napkin stays in place.
– Gentle Removal: Prevents residue and discomfort when removing.
– Hypoallergenic: Minimizes the risk of skin irritation.

## 5. Release Paper

Release paper is used to protect the adhesive before use. It is typically made from silicone-coated paper or film.

### Properties:

– Easy to Peel: Allows for quick and easy application.
– Durable: Protects the adhesive until the napkin is ready for use.
– Non-Stick: Prevents the adhesive from sticking prematurely.

## Conclusion

The composition and properties of the raw materials used in sanitary napkins play a vital role in their performance and user comfort. From the absorbent core to the adhesive, each component is carefully selected to ensure the highest standards of hygiene, comfort, and reliability. Understanding these materials helps consumers make informed choices and appreciate the technology behind everyday hygiene products.