Solvent-Free PU Synthetic Leather Production Solution
Two-component solvent-free reaction coating with material degassing, dynamic mixing and reverse-roll application; water-borne modules use a separate process configuration.
Next-Generation Green Engineering for Synthetic Leather
This solution covers the specified two-component solvent-free PU reaction coating, reverse-roll application and lamination stages. A water-borne mechanical foaming module is a separate process option, with its own formulation and drying requirements. The equipment layout is selected against substrate, finished-leather performance, output and factory conditions.
Bubble-Free Vacuum Reaction Coating
High-viscosity solvent-free resins are continuously degassed below 0.1 kPa and mixed via high-shear micro-pins, completely eliminating the microscopic blisters common to solventless coatings.
Physical Water-Borne Micro-Foaming
Mechanical air-injection generators produce uniform microcellular foam structures in water-borne polyurethanes, achieving soft hand-feel and high breathability without chemical blowing agents.
Equipment packages for greenfield plants and existing-line conversions cover the specified reaction coating and lamination stages. Film quality, tensile performance and automotive interior-air compliance depend on the complete material system and applicable testing.Concept illustration — not a photograph of delivered equipment or a customer installation.
Turnkey Solvent-Free Reaction Coating Process
A synchronized sequence for solvent-free reaction coating, precise film application, thermal lamination and curing. VOC outcomes depend on formulation and application and require testing.
Continuous Thin-Film Vacuum Degassing
High-viscosity polyol and polyisocyanate prepolymers are conditioned in heated stainless steel vessels under continuous vacuum below 0.1 kPa to eliminate all entrained micro-air.
Closed-Loop Precision Stoichiometric Dosing
Servo-driven gear pumps meter components into the delivery lines under continuous Coriolis mass flow control, holding mix ratio tolerances strictly within ±0.3%.
High-Shear Micro-Pin Dynamic Mixing
Component streams meet inside a water-jacketed dynamic mixing chamber, where a micro-pin rotor blends the formulation instantly without air cavitation or thermal runaway.
Reference Solution Engineering Envelope
Typical capability matrix for Haifeng turnkey solvent-free synthetic leather production lines.
| Parameter | Value / Unit | Applicable Configuration / Conditions |
|---|---|---|
| Working Web Width | 1,400 to 1,600 mm (Standard) | High-precision reverse roll coating station |
| Continuous Line Speed | 5.0 to 25.0 m/min | Synchronized roll-to-roll servo drive system |
| Liquid Coating Thickness | 0.05 to 0.30 mm | Precision three-roll micro-gap adjustment |
| Cross-Web Thickness Tolerance | Within ±2 µm | Precision-ground hard chrome rolls on rigid machine bed |
| Degassing Vacuum Level | Absolute pressure < 0.1 kPa | Multi-stage continuous thin-film falling vessels |
| VOC Emissions Level | Material-dependent; test method and detection limit to be confirmed | 100% solids solvent-free formulation without DMF |
Core Equipment for This Solution
The package covers two-component metering and mixing, a reverse-roll coating interface, material conditioning and controls for the solvent-free route. Water-borne mechanical foaming is a separate process module. Conveying and unwinding are optional; chemistry, release paper, water and power are agreed external interfaces.
Core Advantages of Haifeng Eco-Leather Solutions
Engineering features designed to solve pinhole defects, high solvent recovery costs, and automotive interior odor hurdles.
Solvent-Free Reaction Coating
The selected reactive formulation avoids the conventional solvent carrier; finished-product VOC and odor results require testing.
Precision Reverse-Roll Application
The specified three-roll station controls wet-film thickness across the working web.
Material Degassing
Vacuum conditioning and dynamic mixing control entrained air for the selected resin viscosity.
Process-Specific Curing
The curing section is matched to the reactive coating; comparative energy use depends on the baseline and operating conditions.
Related Project Draft
Review the project configuration described in the supplied brief. Project records and reported results require verification before public use.
Frequently Asked Questions
Find answers about Solvent-Free Eco Synthetic Leather Solution, including material selection, equipment configuration and the information needed to plan a production line.
How does solvent-free PU leather achieve softness comparable to wet-process leather?
Can an existing wet-process DMF line be converted to this solvent-free system?
What prevents the high-viscosity reactive resin from curing on the coating rolls?
How does the equipment ensure peel strength on dense microfiber substrates?
Request a Solvent-Free Synthetic Leather Proposal
Submit your web width, substrate types, and target daily yardage for a customized equipment proposal.
