# Sanitary Pad Raw Material Composition and Properties
## Introduction to Sanitary Pad Materials
Sanitary pads are essential feminine hygiene products designed to absorb menstrual flow. The quality and performance of these products largely depend on their raw material composition. Modern sanitary pads consist of multiple layers, each serving a specific purpose to ensure comfort, absorption, and protection.
## Core Components of Sanitary Pads
### 1. Top Sheet (Cover Stock)
The top layer that comes in direct contact with the skin is typically made from:
– Non-woven polypropylene (most common)
– Perforated plastic film
– Cotton or other natural fibers (in premium products)
Properties: Soft, breathable, quick-drying, and hypoallergenic to prevent skin irritation.
### 2. Absorbent Core
The middle layer responsible for fluid absorption consists of:
– Fluff pulp (wood cellulose)
– Superabsorbent polymers (SAP)
– Combination of both materials
Properties: High absorption capacity, good retention, and minimal rewet (preventing backflow).
### 3. Back Sheet
The bottom layer that prevents leakage is usually composed of:
– Polyethylene film
– Breathable microporous film
– Biodegradable materials in eco-friendly options
Properties: Liquid-proof, flexible, and comfortable against clothing.
### 4. Adhesive Components
– Pressure-sensitive adhesive for pad attachment to underwear
Keyword: sanitary pad raw material
– Release paper backing (peel-off layer)
## Additional Features in Modern Pads
### Wings
Extra flaps that fold under underwear for better security, typically made from:
– Non-woven materials
– Plastic film with adhesive
### Fragrance Components (optional)
Some pads include:
– Microencapsulated fragrance beads
– Natural essential oil coatings
## Material Properties and Performance Factors
Key performance characteristics influenced by raw materials:
– Absorption rate: How quickly fluid is drawn away from the surface
– Absorption capacity: Total fluid the pad can hold
– Dryness: Ability to keep surface dry after absorption
– Comfort: Softness and breathability
– Odor control: Materials that neutralize or mask menstrual odor
## Environmental Considerations
Recent developments in sanitary pad materials include:
– Biodegradable top sheets from bamboo or cotton
– Plant-based superabsorbent polymers
– Compostable back sheets
– Reduced plastic content
Understanding the composition and properties of sanitary pad raw materials helps consumers make informed choices and manufacturers develop better products. The continuous innovation in materials aims to improve performance while reducing environmental impact.
