# 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 ensuring quality and safety. 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 provides bulk and structure, while SAP enhances the pad’s ability to retain liquid. The combination of these materials ensures that the pad remains dry and comfortable.

## 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. These materials are chosen for their softness, breathability, and ability to quickly transfer liquid to the absorbent core. Non-woven fabrics are often treated with a hydrophilic finish to enhance liquid absorption.

## 3. Back Sheet

The back sheet is the outermost layer of the sanitary pad, designed to prevent leakage. It is typically made from polyethylene (PE) or polypropylene (PP) films. These materials are waterproof yet breathable, ensuring that the pad remains discreet and comfortable. Some back sheets are also embossed to provide a better grip on underwear.

## 4. Adhesive

Adhesive is used to secure the sanitary pad to the underwear. It is usually 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 be removed without leaving residue. Some pads also feature wings with additional adhesive for extra security.

## 5. Fragrance and Additives

Some sanitary pads include fragrance or other additives to mask odors or provide additional comfort. These additives are carefully selected to be skin-friendly and non-irritating. However, it’s important to note that not all pads contain these additives, and some women may prefer fragrance-free options.

## Properties of Sanitary Pad Materials

The materials used in sanitary pads are chosen for their specific properties, including:

– Absorbency: The ability to quickly absorb and retain liquid.
– Softness: Ensuring comfort against the skin.
– Breathability: Allowing air to circulate to prevent irritation.
– Leakage Protection: Preventing menstrual fluid from escaping the pad.
– Adhesion: Securing the pad in place without causing discomfort.

In conclusion, the raw materials used in sanitary pads are carefully selected to provide a balance of comfort, absorbency, and protection. Understanding these materials and their properties can help consumers make informed choices about the products they use.