Characteristics

Classification 1

By particle size and appearance

1. Polyurethane aqueous solution (transparent appearance, particle size <0.001 micrometers);

2. Polyurethane aqueous dispersion (translucent appearance, particle size: 0.001-0.1 micrometers);

3. Polyurethane emulsion (cloudy white appearance, particle size >0.1 micrometers);

Classification 2

By the charge nature of hydrophilic groups

1. Anionic waterborne polyurethane (the most important, divided into carboxylic acid type and sulfonic acid type);

2. Cationic waterborne polyurethane;

3. Non-ionic waterborne polyurethane;

Classification 3

By product packaging form

1. Single-component waterborne polyurethane;

2. Two-component waterborne polyurethane;

Applications of Waterborne Polyurethane in Textile Auxiliaries

01 Used as a wrinkle-resistant, anti-shrinkage finishing agent for natural fibers:

In the production of textiles such as cotton and silk, commonly used natural fibers share a common characteristic: they swell when wet and shrink when dry. After these two processes, the relative positions of the natural fibers undergo significant changes, resulting in wrinkling. To avoid this phenomenon and ensure the fibers remain in place, wrinkle-resistant finishing agents are usually used. Previously, the widely used wrinkle-resistant finishing agent was dimethylol dihydroxyethylene urea resin (DMDHEV), also known as 2D resin. Although it achieved good results, it produced a large amount of formaldehyde during processing, which not only harmed the health of operators and polluted the environment but also left a certain amount of free formaldehyde residue on the fabric, posing a health risk to consumers. In this context, the textile industry needed to find a new alternative. The chemical bonds formed between the polymer film contained in waterborne polyurethane finishing agents and the fibers make the wool fibers flatter, achieving anti-shrinkage and anti-wrinkle effects.

02 Used in Fabric Coating Agents:

Polyurethane-coated fabrics can be used to produce fabrics with waterproof and down-proof functions, and are resistant to water, cold, and abrasion. Furthermore, they possess excellent elasticity and a good feel. Currently, polyurethane coating agents used in textile production are mainly divided into two categories: solvent-based and water-based. The solvents used in the former mainly include toluene and DMF, exhibiting significant toxicity and flammability. In contrast, water-based polyurethane does not pollute the environment and forms a good film. When applied to the fabric surface, it forms a durable film that provides waterproofing. In addition, water vapor can diffuse through the amorphous regions of the polyurethane to the surface, giving the coated fabric good waterproof and breathable properties.

Therefore, water-based polyurethane possesses superior properties that traditional solvent-based polyurethanes lack. Applying it to textile auxiliaries can promote the improvement of quality and efficiency in textile production, thus promoting the further development of the textile industry.

Sinograce Chemical Textile Auxiliaries introduces a series of ultra-fine, resilient, and soft-feeling silicone oil products for high-end textile finishing. It's the perfect choice for adding high value to the finishing of premium fabrics!

Our company mainly deals in textile printing and dyeing auxiliaries, including wet friction fastness enhancers, C6 waterproofing agents, fluorine-free waterproofing agents, nano-waterproofing agents, and textile three-proof finishing agents. Samples are available upon request:

+86 0551 63459511

sales@sinogracechem.com

vivisinograce@outlook.com

+8615755193346

http://www.sinogracechem.com