Solvent-Free PU Foaming and Coating Line Upgrade in China

Illustration notice. Process illustrations are not verified photographs of this installation.

Project reference basis. Figures and configuration details are reported in the supplied project brief. They are reference values for the stated application, rather than verified acceptance results or a guarantee for another installation. Confirm the source records, material, tooling, operating schedule and test method when assessing a comparable project.

The customer is a Guangdong-based manufacturer with 9 years of experience in synthetic leather substrate production, specializing in foamed base cloth for automotive interior leather, luggage leather and casual shoe leather. Its 2 traditional solvent-based PU coating lines suffered from high VOC emissions, unstable foam structures, significant raw material waste, heavy labor dependence and inefficient product changeovers, making it difficult to meet increasingly stringent environmental and quality requirements from premium brands and overseas markets. Haifeng Polyurethane Machinery completed the solvent-free intelligent upgrade of both production lines within 4 months, enabling the customer to transition from conventional solvent-based processing to an environmentally friendly solvent-free low-pressure foaming process.

Planning a related production line

For a new synthetic-leather line, confirm the documented chemistry and process route, substrate, layer construction, working width, coating weight and cure/drying interfaces. Output figures from this record apply to its particular product and configuration.

Production brief for technical discussion

Provide a finished-product drawing or sample, material data, target output, automation needs and factory conditions. Haifeng will review the process, equipment interfaces and acceptance plan for your own production goals.

Concept illustration: The process image is a concept illustration used to explain the equipment arrangement; it does not document the delivered site.

Haifeng Polyurethane Machinery upgraded the customer’s 2 traditional solvent-based PU coating lines into an intelligent solvent-free production system for high-end synthetic leather substrates. The project deployed HF-LPM-2A2B-L solvent-free PU low-pressure foaming coating equipment equipped with a ±0.3% high-precision servo metering system, an 8,600 rpm anti-blocking mixing head and an adjustable working width of 1,500–2,200 mm, enabling precise A/B component dosing and stable foaming coating. Each line features an independent PLC control system with more than 40 PU formulas for automotive, luggage and shoe leather, supporting one-click parameter recall and 3–5 minute color changes. Fully sealed foaming cabins, exhaust recovery and digital production data management enable low-VOC production, full-process quality traceability and environmental compliance. Haifeng Polyurethane Machinery also provided on-site installation and commissioning, operator training, 24-hour technical support and regular calibration services.