本身

html

Sanitary Napkin Material Composition and Properties

Introduction

Sanitary napkins are essential feminine hygiene products designed to absorb menstrual flow. The materials used in their construction play a crucial role in comfort, absorption, and overall effectiveness. Understanding the composition and properties of these materials helps consumers make informed choices.

Core Materials

The typical sanitary napkin consists of several layers, each serving a specific purpose:

1. Top Layer (Cover Stock)

This is the layer that comes in direct contact with the skin. Common materials include:

  • Non-woven polypropylene – soft and breathable

  • Perforated plastic film – provides dry surface feel

  • Cotton-like materials – for extra softness

2. Absorbent Core

The middle layer responsible for fluid absorption typically contains:

  • Fluff pulp (wood cellulose) – natural absorbent

  • Superabsorbent polymers (SAP) – gel-forming materials that lock in moisture

  • Sometimes includes recycled materials or bamboo fibers

3. Back Sheet

The bottom layer that prevents leakage, usually made of:

  • Polyethylene film – waterproof barrier

  • Breathable microporous films – for better air circulation

Additional Components

Modern sanitary napkins may also include:

  • Adhesive strips – for secure placement

  • Wings – for better side protection

  • Fragrance additives – though these may cause irritation for some users

Key Properties

Effective sanitary napkin materials must possess several important characteristics:

Absorbency

The ability to quickly absorb and retain fluid is paramount. Superabsorbent polymers can absorb many times their weight in liquid.

Breathability

Materials should allow air circulation to prevent skin irritation and discomfort.

Softness

The top layer must be gentle on sensitive skin to prevent chafing.

Leak Protection

Effective barrier materials prevent fluid from passing through to clothing.

Odor Control

Some materials incorporate odor-neutralizing properties or activated charcoal.

Environmental Considerations

With growing environmental awareness, manufacturers are developing more sustainable options:

  • Organic cotton topsheets

  • Biodegradable backsheets

  • Chlorine-free pulp

  • Reduced plastic content

Conclusion

The materials used in sanitary napkins have evolved significantly, offering better comfort, protection, and environmental friendliness. Understanding these materials helps women choose products that best suit their needs while being mindful of health and ecological impacts.