Superfine fiber synthetic leather, often referred to as microfiber leather or synthetic suede, is known for its soft texture, durability, and versatility. The additives used in its production can enhance its properties, such as softness, breathability, and resistance to wear and tear. Here’s an overview of common additives, their functions, and typical ratios:

Common Additives and Their Functions

1. Polyurethane (PU):

   • Function: Provides flexibility, softness, and water resistance. PU is often the primary polymer used in microfiber leather.
   • Typical Ratio: 30-50% of the total composition, depending on the desired softness and durability.

2. Polyester:

   • Function: Enhances the strength and durability of the synthetic leather. It also provides good color retention and resistance to environmental factors.
   • Typical Ratio: 20-40% of the total composition, varying based on specific application needs.

3. Plasticizers:

   • Function: Increase flexibility and softness of the synthetic leather. They help the material resist cracking and enhance its overall feel.
   • Typical Ratio: 5-15% of the total composition, depending on the softness required.

4. Stabilizers:

   • Function: Improve the thermal stability and resistance to UV degradation, prolonging the lifespan of the material.
   • Typical Ratio: 1-5% of the total composition, depending on the intended use and environmental conditions.

5. Colorants/Dyes:

   • Function: Provide color and aesthetics. They are essential for achieving the desired appearance of the synthetic leather.
   • Typical Ratio: 1-5%, depending on the depth and vibrancy of the color desired.

6. Finishing Agents:

   • Function: Enhance the surface properties, such as water repellency, stain resistance, and texture. They may include waxes or silicone-based compounds.
   • Typical Ratio: 2-10%, based on the required surface finish and feel.

Considerations

• Performance Requirements: The specific ratios and types of additives can vary significantly based on the desired performance characteristics, such as softness, durability, breathability, and water resistance.
• Application: The intended use (e.g., upholstery, fashion, automotive) can influence the choice and proportion of additives.
• Environmental Factors: Consideration of environmental impact and safety standards can also affect the choice of materials and additives.

Conclusion

The formulation of superfine fiber synthetic leather is a careful balance of various additives to achieve specific properties. By adjusting the ratios of these components, manufacturers can tailor the final product to meet diverse needs across industries, from fashion and furniture to automotive interiors.