Dry-Process PU Synthetic Leather Production Solution
Explore dry-process polyurethane synthetic leather production with substrate preparation, coating, thermal curing, roll handling and finishing interfaces.
A solvent-free, integrated solution for the production of dry-processed synthetic leather.
The dry-cast synthetic leather industry, including leather for shoes, bags, and automotive interiors, traditionally relies on manual temperature and pressure control, resulting in frequent defects like bubbles and warping, limiting the pass rate. This leads to low production efficiency, long changeover times, and high raw material waste. Furthermore, the use of solvent systems results in VOC emissions exceeding regulatory limits, and the resulting materials lack durability and resistance to abrasion. Hai Feng's HF-LPM-L series solvent-free PU foam coating machines form the core of its production capabilities. The company can establish new, fully automated production lines or upgrade existing lines with modular components. In addition, Hai Feng offers research and development of solvent-free adhesives, online quality control, and certification assistance to ensure the consistent production of durable, low-VOC dry-cast synthetic leather products.
Environmentally friendly, solvent-free molding
The enclosed exhaust gas collection system achieves extremely low VOC emissions, enabling compliance with EU REACH and RoHS regulations and facilitating market access in international markets.
Multi-variety flexible production
This feature allows for switching between different product variations and simply changing colors, making it suitable for handling small, mixed-variety orders with multiple colors and product types.
Haifeng coating/metering systems interface with agreed web handling, drying and finishing; material-specific recovery systems are itemized.
Polyurethane foam manufacturing process
The complete, solvent-free dry synthesis process for synthetic leather production, from raw material preparation to final finishing, is designed for automated, continuous production.
Raw material pre-treatment process
Complete the surface preparation, including leveling and surface activation, to ensure a strong foundation for subsequent coating adhesion.
Polyurethane (PU) coating process
The HF-LPM-L series machine is capable of precisely mixing solvent-based adhesives, utilizing a dedicated mixing head with 8600 rpm, and achieving a mixing accuracy of ±0.3%. It is also equipped to apply the base material to the surface.
Casting and molding process
Segmented, temperature-controlled curing allows for the completion of cross-linking reactions in a solvent-free PU system, ensuring strong adhesion and durability of the leather.
Main technical specifications
The core parameters for the HF-LPM-1A1B-L and HF-LPM-2A2B-L dry film application equipment, including all performance indicators, are based on the design specifications. Actual performance may vary depending on the raw materials and operating conditions.
| Parameter options | Parameter values |
|---|---|
| Device Model | HF-LPM-1A1B-L (small-scale prototype) / HF-LPM-2A2B-L (large-scale production) |
| Accuracy of measurement | ≤±0.3% |
| Combined engine speed | Leather-specific mixing head, 8600 rpm |
| Adjustable production line width | 1500‑2200 mm |
| Hourly output: HF-LPM-2A2B-L | 120‑150 ㎡/h |
| Time to switch to the complete formula. | ≤1.5 h |
| Time taken for a simple paint job. | 3-5 minutes |
| Target for coating uniformity | ≥98% |
| Target defect rate | ≤2% |
| Associated unit | Raw material pretreatment, online intelligent quality control, and a closed-loop exhaust gas collection system. |
Related Products
Related equipment for the process described on this page. Metering, handling, tooling and downstream scope are confirmed for the selected material and product; each equipment record defines its own configuration.
The Haifeng Advantage
Engineering excellence and manufacturing reliability that global manufacturers depend on for their polyurethane production operations.
High-reliability bonding and molding
Precise dispensing system with a leather-specific mixing head, achieving an accuracy of ±0.3%, reduces bubble formation defects, resulting in uniform coating and ensuring strong adhesion and durability.
Environmentally friendly, low VOC, compliant with regulations
Features a sealed foam design with an exhaust gas collection system, resulting in extremely low VOC emissions, enabling compliance with EU REACH and RoHS regulations and opening up access to high-end international orders.
Efficient and flexible production
This system allows for flexible production and rapid color changes, suitable for orders involving a wide range of materials, including leather for shoes, bags, and automotive interiors. It also supports the modification of existing production lines, reducing project costs.
End-to-end implementation services
We offer comprehensive support, including equipment delivery, adaptation of solvent-free formulations, online quality control integration, sample testing, and assistance with certification documentation, as well as full-scale operational support.
Frequently Asked Questions
Here are some common questions regarding solvent-free dry synthesis of leather. For process evaluation and equipment recommendations, please contact us for technical consultation.
Which model should I choose between HF-LPM-1A1B-L and HF-LPM-2A2B-L?
120-150m, and is selected based on the customer's production capacity.
Can the existing solvent-based, dry leather production line be modified?
Can the equipment directly ensure that the products meet REACH and RoHS certifications?
Why do the time required for color changes and complete formula switches differ?
What types of synthetic leather can this system produce?
also adjust our formulations and processes to meet specific customer requirements.
What is the accuracy of the device's measurements?
performance between batches.
Can a wet-process case prove dry-process output?
What information is needed to size the production line?
What is included in the equipment package?
Are cycle time and finished-product performance fixed?
Submit Your Production Goals
Share the finished product, material, target capacity, automation requirements and factory conditions to discuss a project-specific line configuration.
Related Application References
Review the material, product geometry, equipment scope and reference conditions within each record when assessing a comparable application.
