# 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 function to ensure comfort, absorption, and protection.
## 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:
– Nonwoven polypropylene or polyethylene
– Perforated plastic film
– Cotton or bamboo fiber blends
Key properties: Softness, breathability, and quick-dry capability
### 2. Absorbent Core
This is the central layer responsible for fluid absorption. Common materials include:
– Fluff pulp (wood cellulose)
– Superabsorbent polymers (SAP)
– Airlaid paper
– Cotton or rayon blends
Absorption capacity ranges from 10-50 times its weight in liquid
### 3. Back Sheet
The waterproof layer prevents leakage. Materials used:
– Polyethylene film
– Microporous breathable film
– Nonwoven fabric with waterproof coating
Properties: Moisture barrier while allowing vapor transmission
### 4. Adhesive Components
These include:
– Pressure-sensitive adhesive for pad attachment
– Hot melt adhesive for layer bonding
– Release paper for packaging
## Specialized Materials in Premium Pads
### 1. Natural Fiber Options
– Organic cotton
– Bamboo charcoal fiber
– Silk protein coatings
### 2. Odor-Control Additives
– Activated carbon
– Baking soda
– Antimicrobial agents
### 3. Comfort Enhancers
– Aloe vera coatings
– Vitamin E treatments
– Cooling gel components
## Material Properties and Performance Factors
### Absorption Characteristics
– Absorption rate (seconds)
– Retention capacity (ml/g)
– Rewet performance (dryness)
### Physical Properties
– Basis weight (g/m²)
– Thickness (mm)
– Tensile strength (N/50mm)
### Safety Standards
– pH balance (4.5-8.5)
– Free from harmful chemicals
– Hypoallergenic certification
## Environmental Considerations
Keyword: sanitary pad raw material
Recent developments focus on:
– Biodegradable materials
– Compostable components
– Reduced plastic content
– Plant-based SAP alternatives
## Manufacturing Process Overview
Raw materials undergo:
– Unwinding and layering
– Ultrasonic or adhesive bonding
– Shaping and cutting
– Packaging and sterilization
## Future Material Trends
Emerging innovations include:
– Smart materials with moisture indicators
– Nanofiber technology
– Biodegradable superabsorbents
– Self-cleaning surfaces
Understanding sanitary pad raw materials helps consumers make informed choices and manufacturers develop better products that balance performance, comfort, and environmental impact.
