In the production processes of PU and PVC artificial leather and synthetic leather, the leveling performance of the coating surface, the feel, and the service life of the release paper are key indicators for evaluating product quality and production efficiency. Our company's product leather leveling agent 21565, as a polyether-modified poly siloxane leveling agent, demonstrates significant application value in the synthetic leather manufacturing field. It possesses excellent surface tension reduction capabilities, superior smoothness and feel characteristics, and practical value in enhancing the reuse frequency of release paper. This product provides professional and efficient process aid solutions for leather product manufacturers.


I. Core Physical and Chemical Properties


Product leather leveling agent 21565 is a light yellow transparent liquid. At 25 degrees Celsius, its viscosity ranges from 500 to 1000 square millimeters per second, and its refractive index is from 1.4250 to 1.4450. This product is a non-ionic polyether-modified poly siloxane surfactant. It can significantly reduce the surface tension of liquid coatings, thereby enhancing the wetting ability of the release paper and the substrate, and has strong anti-bubbling capabilities.


II. Core Performance Advantages


Product leather leveling agent 21565 demonstrates the following core performance advantages in synthetic leather production applications:


Excellent wetting and anti-bubbling performance. The product can significantly reduce the surface tension of the system, improve the wetting ability of the slurry on the release paper, effectively prevent surface defects such as bubbling, warping, and pinholes caused by uneven surface tension, and is suitable for the production of mirror, flat, textile, matte, and fine texture leather.


Dry and smooth feel. This product can give PU and PVC artificial leather a dry and smooth touch, enhancing the product's grade and wearing comfort, and significantly improving the surface texture effect of various surface patterns.


Enhanced resistance to abrasion and release paper service life. The product can increase the abrasion resistance of the paint film and the leather surface, and improve the peeling performance between the release paper and the coating by improving the separation performance between the release paper and the coating, significantly increasing the reuse frequency of the release paper and effectively reducing production costs.


III. Main Application Areas


Product leather leveling agent 21565, with its unique structure of polyether-modified silicone oil and excellent process performance, can play a key role in the following synthetic leather manufacturing fields:


1. Dry-process PU artificial leather production. In the coating process of dry-process PU artificial leather, product leather leveling agent 21565 can be used as a leveling agent and feel agent, effectively improving the leveling and wetting ability of the slurry on the release paper, reducing pinholes and warping phenomena, and making the finished product surface texture clear and full, with a comfortable and smooth touch. The recommended addition amount is 0.1% to 1% of the total formula, and it can be added at any stage of production, with simple and flexible operation.


2. PVC artificial leather manufacturing. In PVC extrusion and coating artificial leather production, this product can improve the flowability of PVC slurry and its adhesion to the substrate, giving the product surface excellent gloss and flatness, while also enhancing wear resistance and anti-sticking performance.


3. Surface treatment and coating of PU synthetic leather. In the coating and surface treatment processes of PU synthetic leather, product leather leveling agent 21565 can help improve the leveling and gloss uniformity of the coating, giving leather products a high-end touch and appearance effect, suitable for shoe leather, clothing leather, luggage leather, and automotive interior leather categories.


4. Protection and reuse process optimization of release paper. By improving the wetting balance and peeling performance between the coating and the release paper, this product performs well in protecting the surface of the release paper and reducing paper surface wear, effectively extending the service life of the release paper, especially for special texture release papers such as textured and deep textured ones, it has a significant improvement effect on the number of reuse times.


5. Leather coatings and ink systems. The product is also applicable to leather coating and printing ink systems, improving the leveling and color spreading properties of the coatings, helping to achieve uniform and rich coating effects, and enhancing the overall appearance quality of the products.


IV. Packaging Specifications and Storage Conditions


The leather coating leveling agent 21565 provides two packaging options: a 25-liter plastic drum and a 200-liter plastic drum or iron drum. These packaging specifications are convenient for flexible selection by enterprises of different production scales. The product should be stored in a cool and dry place and kept sealed. This product is transported as a non-hazardous chemical and has a shelf life of 24 months.


V. Quality Assurance and Technical Support


The leather coating leveling agent 21565 has established a strict quality control system during the production process. It conducts full-process testing on key indicators such as product appearance, viscosity, and refractive index to ensure consistency and stability between batches. It should be noted that the technical parameters provided in this manual are typical values and are for reference only, not as the product acceptance standards. Due to differences in usage conditions, it is recommended that users conduct relevant tests or consult the technical personnel of our company before use to determine the optimal addition amount and applicable process conditions.


As the domestic artificial leather and synthetic leather industries continue to upgrade towards higher quality, lower cost, and green production, the demand for auxiliary products that can improve leveling, enhance hand feel, and reduce production costs is increasing. The leather coating leveling agent 21565, with its polyether-modified silicone oil structure advantages, stable physical and chemical properties, and wide application adaptability, is becoming a professional auxiliary product option for PU and PVC synthetic leather production enterprises, helping downstream customers improve product quality and production efficiency.