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What is the biggest difference between solvent-free synthetic leather and water-based synthetic leather?


In the preparation process of the waterborne synthetic leather, it is also necessary to use an organic solvent as a carrier, and the dispersion is performed in the water until the reaction is nearly completed. Strictly speaking, water-based synthetic leather, at best, reduces the organic solvent to a certain level, not absolute use of organic solvents. The water-based resin must be carefully used semi-dry paste technology. Because the aqueous resin film formation process, due to the surface of the heat will be the first conjunctiva and water can not be dissolved in the surface film, which will cause the surface without the initial viscosity and adhesive properties significantly reduced phenomenon.
In addition, in order to facilitate the drying of the film, water-based resin should use a multi-blade thin scraping process, resulting in extended production equipment, increased energy consumption, and the need for more personnel.
To sum up, no matter which production process is adopted, it requires the use of large amounts of solvents, or requires a large amount of energy and labor. And what is a zero solvent? That is, raw materials used in production do not add any low-boiling organic solvent; they use the polyols in the raw solution to be modified to access different types of material systems, so that the production process has a new technological breakthrough space, and no waste gas or waste water is produced in the production process. To achieve zero emissions.
Many people find that the use of traditional PU leather is mostly about six months to two years. And our zero-produced PU leather, the minimum requirements are not hydrolyzed within three years, while there are more than 5 years, more than 10 years, more than 15 years for everyone to buy grading. As far as physical performance is concerned, a test based on the national standard for dry artificial leather has not only been passed, but most of the data exceeds the standard by more than 30%. In the field of environmental protection, zero-solvent PU leather has fully passed the SGS REACH hazardous materials and ROHS detection of heavy metals. Really achieved five zero: zero solvent, zero plasticizer, zero emissions, zero odor, zero metal.
The energy consumption, compared to the traditional leather production line motor is dragging more than 100 meters, the requirement is 150 °C temperature and the need to recover the volatile solvent; zero-solvent PU leather production line motor just dragging 50 meters, the requirements of 90 °C below the temperature and is directly formed.
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