Wet-Process PU Synthetic Leather Production Solution
Explore wet-process PU synthetic leather production, including coating, water-bath coagulation, washing, solvent-recovery interfaces and line controls.
Wet-Process PU Synthetic Leather Production Solution
Wet-processed PU synthetic leather is widely used in automotive interiors, handbags, and footwear. Traditional wet-processing lines rely on manual adjustment of process parameters, resulting in inconsistent film quality, limited production speed, and long changeover times. Furthermore, the low DMF recovery efficiency poses environmental risks, and the resulting product lacks the durability and quality demanded by high-end brands. The Hai Feng wet-processing PU synthetic leather solution centers around an intelligent wet-processing line, combined with a three-stage DMF recovery system and a fully digitalized control platform. This allows for the establishment of a complete, automated production line or the modular upgrade of existing lines. The solution includes specialized PU formulations, online quality control, and certification documentation, ensuring stable production of high-quality, environmentally friendly, and compliant wet-processed leather.
Efficient DMF recycling for environmentally friendly molding
A third-grade DMF distillation recovery system, with a recovery rate of ≥95%, resulting in low VOC levels in the workshop and minimizing the risk of environmental penalties.
Efficient and flexible re-manufacturing
Complete specification changes can be implemented in ≤1 hour, reducing material waste and enabling the production of small-batch, customized orders across multiple product lines.
Haifeng core supply and integrated coagulation/washing/drying/recovery responsibilities are defined for the selected wet route.
Wet-process leather manufacturing process
A fully automated wet-process leather production process, from raw material preparation to final product sampling and verification, ensures continuous and stable production.
Base fabric pretreatment process
Complete the substrate preparation, including substrate release, leveling, and stress stabilization, to create a suitable surface for applying the coating.
The paste application process
A high-precision coating unit ensures uniform application of the PU paste, with a paste ratio accuracy of ±0.8%, guaranteeing consistent film uniformity.
Water bath solidification process
The mixture was introduced into a solidification bath, where DMF solvent was used to displace the initial material, resulting in the formation of a porous polyurethane (PU) resin membrane.
Main technical specifications
Core technical parameters for the wet-process synthetic leather production line. The following values represent the design targets; actual performance may vary depending on the PU resin, backing material, and operating conditions.
| Parameter options | Parameter values |
|---|---|
| Instant maximum coating speed | 20‑25 m/min |
| Precision control of the sauce ratio. | ±0.8% |
| Desired film uniformity of the adhesive. | ≥99% |
| Third-tier DMF recovery rate | ≥95% |
| Steady-state VOC emissions from the factory. | ＜10 mg/m³ |
| Time required for full specification change | ≤ 1 hour |
| Target finished product pass rate | ≥98% |
| Target defect rate | ≤2% |
| Finished product: 23°C bend resistance | ≥ 200,000 times |
| Associated unit | Key processes include: pre-processing, online intelligent quality control, and a three-stage DMF recovery system. |
Equipment for Integrated solution for wet-process synthetic leather production
Haifeng core supply and integrated coagulation/washing/drying/recovery responsibilities are defined for the selected wet route.
Key features of the plan
The complete wet-cast leather production line offers a comprehensive advantage in terms of quality, environmental friendliness, flexibility, and technical service, enabling customers to consistently produce high-quality leather.
Achieve consistent film quality.
Precise viscosity and coating control minimize pinholes and cracks, resulting in uniform film formation and improved durability of the finished product.
DMF: Efficient and environmentally compliant recycling
A third-stage distillation DMF recovery system, with high solvent recovery rates, reduces solvent procurement costs, ensures compliance with workplace VOC emissions regulations, and minimizes environmental risks.
Efficient and flexible production
Quickly adapts to various types of leather, including car leather, luggage leather, and shoe leather. Also supports the modular modification of existing production lines, reducing project costs.
End-to-end implementation services
Customized solutions, formulation adaptation, DMF system integration, sample testing, and assistance with certification documentation, along with long-term maintenance and support.
Submit Your Production Goals
Share the finished product, material, target capacity, automation requirements and factory conditions to discuss a project-specific line configuration.
Questions About Integrated solution for wet-process synthetic leather production
Find answers about Integrated solution for wet-process synthetic leather production, including material selection, equipment configuration and the information needed to plan a production line.
Is solvent recovery part of the same equipment package?
What information is needed to size the production line?
What is included in the equipment package?
Are cycle time and finished-product performance fixed?
Related Application References
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