Текстильное покрытие на водной основе из полиуретана technology is widely used in the textile industry, with different coating methods suitable for different production needs and product functions. The following details five main water-based polyurethane coating methods, including their principles, advantages, and typical application areas. Dip Coating Dip coating is a basic and effective water-based polyurethane coating process. The principle involves directly immersing the fabric in a water-based polyurethane emulsion . Uniform coating is achieved by controlling the immersion time, temperature, and emulsion concentration. This method is simple, easy to operate, and particularly suitable for small-batch production or experimental research. Dip coating is often used for preliminary experiments on functional textiles, such as the development and testing of waterproof and stain-resistant coatings. Pad-Batch Process The pad-batch process is a continuous coating process, mainly including three steps: padding, drying, and heat curing. First, the fabric is immersed in a bath containing water-based polyurethane using rollers to control the liquid content; then it enters the drying stage to remove water and form a preliminary coating; finally, heat curing promotes the cross-linking of polyurethane molecules, enhancing the strength and durability of the coating. This process is highly controllable and suitable for large-scale continuous production, widely used in clothing fabrics, tents, outdoor products, and other fields. Spray Coating Spray coating utilizes atomization technology to evenly spray the water-based polyurethane emulsion onto the fabric surface, and the coating thickness is controlled by airflow. This method is suitable for fabrics with complex shapes or three-dimensional structures, providing uniform coating distribution and good coverage. Spray coating is often used in products requiring high coating uniformity, such as automotive interiors, protective clothing, and home textiles. Knife Over Roll Coating Knife over roll coating uses a doctor blade to evenly remove excess water-based polyurethane emulsion, thereby forming a coating of precise thickness on the fabric surface. This method offers extremely precise control over coating thickness and is suitable for applications requiring high precision, such as medical protective clothing and precision filtration materials in industrial textiles. Composite Modification Method To improve the performance of water-based polyurethane coatings , composite modification techniques are often employed. Blend modification enhances the weather resistance and abrasion resistance of coatings by blending water-based polyurethane with materials such as acrylates and silanes; nanocomposite technology imparts special properties to coatings by adding functional nanomaterials such as nano-titanium dioxide (for UV resistance) or nano-silver (for antibacterial properties); and crosslinking technology further improv...

Синоградс Химикал ПУ series is an anionic aliphatic polyester polyurethane dispersion product, a high-gloss product with a relatively hard feel. It can be used for high-gloss surface treatment of fabrics, leather, synthetic leather, etc. 1. High gloss 2. Excellent yellowing resistance 3. Excellent abrasion resistance Typical properties Appearance:                    Milky white liquid pH: 7.5-9.0 Solid content:                   40±1% Charge:                             Anionic Viscosity (25℃):               100-500cP Tensile strength (MPa):     >25 100% Modulus (MPa):       >20 Elongation (%)：               >180 *These properties represent typical results only and should not be considered as specifications.  Refer to the specific Certificate of Analysis (COA) for details. 160kg, 1000 kg Store in a cool, dry place away from light. Storage temperature should be between 5~35℃. Keep the packaging intact. This product has a shelf life of six months from the date of manufacture. Performance evaluation is recommended after six months. This product must be strictly protected from frost.  Skinning may inevitably occur during storage and transportation; therefore, it is recommended to filter the product before use and use it as soon as possible. Anhui Sinograce Chemical Co., Ltd.

Полиуретан на водной основе Waterborne polyurethane uses water as the dispersion medium and has advantages such as being non-flammable, environmentally friendly, non-toxic, and safe. Compared to rubber, polyurethane has better wear resistance and resistance to cutting and tearing. Compared to metals and plastics, polyurethane's sound insulation and wear resistance properties are particularly outstanding, making it irreplaceable. It is now widely used in coatings, adhesives, synthetic leather, elastomers, building materials, textile finishing, polymer surfactants, and other fields. Sinograce Chemical offers water-based polyurethane emulsions and resins, as well as water-based polyurethane raw materials DMPA and DMBA, and water-based resins used in water-based wood coatings.  Inquiries are welcome. Room 1013, Building A5, Financial Port Center, Yangzijiang Road, Baohe District, Hefei City， Anhui province, China +86 0551 63459511 sales@sinogracechem.com vivisinograce@outlook.com +8615755193346 http://www.sinogracechem.com

Водорастворимые полиуретановые покрытия для тканей могут придавать тканям мягкость и объем, текстуру, напоминающую кожу, а также значительно улучшать устойчивость к смятию, усадке, эластичность и гибкость покрытых тканей. Среди них водорастворимые полиуретановые покрытия с водоотталкивающими свойствами особенно популярны среди производителей тканей и потребителей. Так как же достигается водоотталкивающий эффект? Ключ кроется в их способности плотно прилегать к поверхности ткани и образовывать сплошную и плотную пленку. Чем плотнее эта пленка, тем сложнее молекулам воды проникнуть внутрь; в то же время, чем сильнее ее адгезия к ткани, тем устойчивее она к стирке и тем меньше вероятность отслоения. This strong adhesion mainly stems from the polar groups in the water-based polyurethane structure, such as uretha ne bonds, urea bonds, and ionic bonds. These groups interact with the fabric surface through Coulomb forces, van der Waals forces, and hydrogen bonds. The ideal bonding state is when the adhesion between the coating agent and the fabric is greater than the cohesive force of the fabric itself, but less than the cohesive force between the coating agent molecules. The density of the film is directly related to the cohesive energy of the water-based polyurethane molecules: the greater the cohesive energy, the smaller the distance between molecules, and the more compact the resulting film structure. In addition, to achieve better waterproofing effects, the surface tension of the water-based polyurethane film is reduced as much as possible, which increases the contact angle of water droplets on the film, making them less likely to spread out, thus effectively reducing the penetration of water into the coating. Sinograce Chemical produces water-based polyurethane resins for textile applications, including polyurethane waterproof coatings and polyurethane textile resins .  Inquiries are welcome. Room 1013, Building A5, Financial Port Center, Yangzijiang Road, Baohe District, Hefei City， Anhui province, China +86 0551 63459511 sales@sinogracechem.com vivisinograce@outlook.com +8615755193346 http://www.sinogracechem.com