Soy protein fiber vs. Modal for towels - What is The Difference?

Last Updated May 21, 2025

Soy protein fiber offers natural softness and excellent moisture absorption, making it eco-friendly and gentle on the skin. Modal fibers provide superior durability and quick-drying properties, enhancing the towel's longevity and comfort.

Table of Comparison

Feature Soy Protein Fiber Modal
Material Origin Natural, plant-based from soybeans Regenerated cellulose from beech trees
Softness Very soft, smooth texture Extremely soft, silky feel
Absorbency High moisture absorption, quick drying Excellent moisture wicking and fast drying
Durability Moderate strength, biodegradable High durability, shrink-resistant
Eco-Friendliness Renewable, biodegradable, low environmental impact Renewable, biodegradable but chemically processed
Use in Towels Soft, gentle on skin, eco-friendly option Luxurious softness, long-lasting towel quality

Introduction to Soy Protein Fiber and Modal

Soy protein fiber, derived from soybean protein, offers exceptional softness, moisture absorption, and eco-friendly qualities ideal for towels. Modal, a semi-synthetic fiber made from beech wood pulp, provides durability, breathability, and a smooth texture that enhances towel comfort. Both fibers demonstrate sustainable advantages, but soy protein fiber excels in biodegradability while modal stands out for its strength and color retention.

Origins and Production Processes

Soy protein fiber originates from soybean proteins extracted and spun into fibers through a wet extrusion process, emphasizing sustainability and biodegradability. Modal is produced from beech tree pulp using a chemical-intensive process known as the viscose method, where cellulose is regenerated into smooth, durable fibers. The contrasting origins--plant-based protein versus cellulose--and distinct production techniques influence the texture, absorbency, and eco-friendliness of towels made from these fibers.

Environmental Impact Comparison

Soy protein fiber towels offer a more sustainable alternative to modal, as soy protein fiber is derived from renewable soybeans, reducing reliance on wood pulp used in modal production. The manufacturing process of soy protein fiber typically requires less water and energy, resulting in a lower carbon footprint compared to modal fibers. Additionally, soy protein fiber is biodegradable and compostable, minimizing environmental pollution and contributing to a circular textile economy.

Texture and Softness

Soy protein fiber towels offer a silky, smooth texture and exceptional softness, rivaling natural fibers like cotton while being eco-friendly. Modal towels provide a plush, velvety feel with excellent moisture absorption and durability, maintaining softness even after multiple washes. Both fibers enhance towel comfort, but soy protein fiber excels in lightweight softness, whereas Modal delivers a thicker, more luxurious texture.

Absorbency and Moisture-Wicking

Soy protein fiber exhibits superior absorbency compared to Modal, effectively trapping moisture due to its natural hydrophilic properties. Modal provides excellent moisture-wicking abilities, quickly drawing sweat away from the skin to the towel's surface for faster evaporation. Towels made from soy protein fiber offer plush softness and high moisture retention, while Modal towels excel in dryness and breathability during use.

Durability and Longevity

Soy protein fiber offers moderate durability suitable for towels but tends to wear faster than Modal, which is known for its superior strength and resistance to pilling. Modal fibers maintain shape and softness after repeated washes, making Modal towels last longer with minimal fabric degradation. The moisture-wicking and quick-drying properties in Modal further enhance towel longevity compared to the more delicate soy protein fiber.

Skin Sensitivity and Hypoallergenic Properties

Soy protein fiber offers superior skin sensitivity benefits due to its natural amino acid content, which enhances moisture retention and reduces irritation, making it ideal for those with sensitive skin. Modal, derived from beech tree cellulose, is highly breathable and smooth but may not provide the same level of hypoallergenic properties as soy protein fiber. Towels made from soy protein fiber are often preferred for sensitive skin because they are less likely to cause allergic reactions compared to modal fabrics.

Care and Maintenance Requirements

Soy protein fiber towels require gentle washing in cold water to preserve their softness and durability, avoiding bleach and high heat drying to prevent fiber damage. Modal towels are more resilient, tolerating machine washing and drying at moderate temperatures while maintaining their smooth texture and colorfastness. Both fibers benefit from air drying when possible to extend towel lifespan and reduce shrinkage.

Cost and Market Availability

Soy protein fiber towels generally cost more due to their renewable and biodegradable properties, appealing to eco-conscious consumers, while Modal towels are competitively priced and widely available because of established manufacturing processes. Modal, derived from beech trees, benefits from a mature supply chain, making it easier to source in bulk for mass production at lower costs. Soy protein fiber remains niche with limited market availability, primarily targeting premium segments focused on sustainability.

Best Applications for Towels

Soy protein fiber offers excellent moisture absorption and biodegradability, making it ideal for eco-friendly towels with a soft, silky texture. Modal excels in durability, smoothness, and high wet strength, providing a luxurious feel and long-lasting performance in premium towels. Combining soy protein fiber with modal enhances absorbency and softness while maintaining strength, optimizing towels for both everyday use and luxury markets.

Soy protein fiber vs. Modal for towels - What is The Difference?

Infographic: Soy protein fiber vs Modal for Towel



About the author. Kakani is a respected author and expert in materials for industrial and manufacturing applications. With years of experience in both research and industry.

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