# Sanitary Napkin Raw Materials: Key Components and Their Functions
## Introduction to Sanitary Napkin Composition
Sanitary napkins are essential feminine hygiene products designed to absorb menstrual flow. The effectiveness and comfort of these products depend on carefully selected raw materials that work together to provide protection, comfort, and safety. Understanding these components helps consumers make informed choices about the products they use during menstruation.
## Core Absorbent Layer Materials
Keyword: sanitary napkin raw materials
### Wood Pulp and Superabsorbent Polymers (SAP)
The heart of any sanitary napkin is its absorbent core, typically composed of:
– Fluff pulp: Processed wood fibers that quickly absorb liquid
– SAP (Superabsorbent Polymer): A hydrogel material that can absorb many times its weight in liquid
This combination creates a highly efficient absorption system where the fluff pulp rapidly pulls in moisture and the SAP locks it away, preventing leaks and keeping the surface dry.
## Top Sheet: The Contact Layer
### Nonwoven Fabric Options
The top sheet is the layer that comes in direct contact with the skin. Common materials include:
– Polypropylene nonwovens: Known for their softness and quick-drying properties
– Perforated film: Creates a dry-feel surface
– Cotton-like materials: Provide a natural feel
Manufacturers often treat the top sheet with aloe vera or vitamin E for added skin comfort and to reduce irritation.
## Back Sheet: The Protective Barrier
### Moisture-Proof Materials
The back sheet prevents leaks and keeps clothing dry. It’s typically made from:
– Polyethylene film: Provides complete liquid protection
– Breathable microporous films: Allow vapor transmission while blocking liquid
– Nonwoven laminates: Combine protection with cloth-like comfort
Some premium products use environmentally friendly materials like cornstarch-based films for the back sheet.
## Adhesive Components
### Secure Attachment Systems
Sanitary napkins include several adhesive elements:
– Pressure-sensitive adhesive strips: For secure attachment to underwear
– Release paper: Protects the adhesive before use
– Wing adhesives: Keep wings folded around underwear
These adhesives are specially formulated to be strong enough to stay in place but gentle enough not to damage fabrics.
## Additional Functional Components
### Enhancing Performance and Comfort
Modern sanitary napkins may include:
– Deodorizing agents: To neutralize odors
– Antibacterial treatments: For added hygiene
– Side barriers: Prevent side leakage
– Embossed channels: Help distribute fluid evenly
Some premium products incorporate natural ingredients like herbal extracts for additional benefits.
## Safety and Quality Considerations
### Material Selection Standards
Manufacturers must ensure all materials:
– Are dermatologically tested
– Meet regulatory requirements
– Are free from harmful substances
– Maintain consistency in quality
The industry continues to innovate with biodegradable and more sustainable material options to reduce environmental impact while maintaining performance.