# 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 the raw materials used in their construction. Understanding the composition and properties of sanitary pad materials helps consumers make informed choices and manufacturers improve product quality.
## Core Components of Sanitary Pads
### 1. Top Sheet (Cover Stock)
The top sheet is the layer that comes in direct contact with the skin. It’s typically made from:
– Polypropylene non-woven fabric
– Perforated plastic film
– Cotton or bamboo fiber blends
Key properties: Softness, breathability, quick-drying capability, and hypoallergenic qualities.
### 2. Absorbent Core
This is the central layer responsible for fluid absorption. Common materials include:
– Fluff pulp (wood cellulose)
– Superabsorbent polymers (SAP)
– Combination of both
The absorbent core must balance absorption capacity with slimness for comfort.
### 3. Back Sheet
The bottom layer prevents leakage and is usually composed of:
– Polyethylene film
– Breathable microporous film
– Biodegradable materials in eco-friendly options
This layer requires waterproof properties while maintaining flexibility.
## Additional Components
### 1. Adhesive Layers
– Pressure-sensitive adhesive for pad attachment to underwear
– Hot melt adhesive for bonding layers together
### 2. Release Paper
Protects the adhesive before use, typically made from silicon-coated paper or plastic film.
Keyword: sanitary pad raw material
### 3. Wings (in winged pads)
Usually made from the same material as the top sheet with additional adhesive strips.
## Material Properties and Performance Factors
### 1. Absorption Capacity
Determined by the combination of fluff pulp and SAP ratio. Higher SAP content increases absorption but may reduce softness.
### 2. Comfort Factors
– Breathability (measured in g/m²/24h)
– Flexibility and conformability
– Surface dryness (rewet value)
### 3. Safety Standards
Materials must be:
– Free from harmful chemicals
– Dermatologically tested
– Compliant with international standards (FDA, EU regulations)
## Emerging Material Trends
### 1. Eco-friendly Alternatives
– Biodegradable top sheets from bamboo or corn fibers
– Plant-based SAP from starch
– Compostable back sheets
### 2. Smart Materials
– Odor-control technologies
– Temperature-regulating fabrics
– Antimicrobial treatments
## Conclusion
The composition of sanitary pad raw materials directly impacts product performance, comfort, and safety. As technology advances, we’re seeing more innovative materials that combine superior functionality with environmental responsibility. Understanding these material properties helps both manufacturers in product development and consumers in making informed purchasing decisions.
