Sanitary Napkin Raw Materials: Key Components and Their Functions
# Sanitary Napkin Raw Materials: Key Components and Their Functions
Sanitary Napkin Raw Materials: Key Components and Their Functions
Sanitary napkins are essential feminine hygiene products used by millions of women worldwide. Understanding the raw materials that go into their production helps consumers make informed choices about the products they use. This article explores the key components of sanitary napkins and their respective functions.
1. Top Sheet (Cover Layer)
The top sheet is the layer that comes in direct contact with the skin. It’s typically made from:
- Non-woven fabric (polypropylene or polyethylene)
- Perforated plastic film
- Cotton or cotton blends
This layer needs to be soft, breathable, and quick-drying to maintain comfort while allowing menstrual fluid to pass through to the absorbent core.
2. Absorbent Core
The core is the most important functional component, responsible for fluid absorption. It consists of:
- Fluff pulp (wood cellulose)
- Superabsorbent polymers (SAP)
- Sometimes includes cotton or rayon fibers
Keyword: sanitary napkin raw materials
The SAP can absorb many times its weight in liquid, transforming it into a gel to prevent leakage and maintain dryness.
3. Back Sheet
The back sheet is the waterproof layer that prevents leaks. Common materials include:
- Polyethylene film
- Microporous breathable film
- Biodegradable materials in eco-friendly options
This layer must be flexible yet strong enough to contain fluids while allowing some breathability.
4. Adhesive Components
Several adhesive elements are used in sanitary napkins:
- Pressure-sensitive adhesive for attaching to underwear
- Hot melt adhesive for bonding layers together
- Release paper backing for the adhesive strip
5. Additional Features
Modern sanitary napkins may include:
- Wings with adhesive for better security
- Odor control agents (activated charcoal, baking soda)
- Aloe vera or chamomile for skin comfort
- Antibacterial treatments
Environmental Considerations
With growing environmental awareness, manufacturers are developing alternatives:
- Biodegradable top sheets from bamboo or corn fibers
- Organic cotton components
- Chlorine-free pulp
- Plant-based adhesives
Understanding these materials helps consumers choose products that align with their comfort needs, health concerns, and environmental values. As technology advances, we can expect continued innovation in sanitary napkin materials and designs.