Polyester Polyols & PU Systems for Artificial Leather
Enviol Polytech Solutions provides sustainable polyester and polyether polyols optimized for artificial leather production. Our materials are engineered to support wet process, dry process, and microfiber PU manufacturing lines with controlled viscosity, consistent molecular weight distribution, and enhanced hydrolysis resistance. By combining advanced polyester chemistry with customized polyurethane resin systems, we enable artificial leather manufacturers to achieve superior abrasion resistance, soft-touch performance, durability, and long-term stability across footwear, automotive, furniture, and fashion applications.
Wet Process PU Leather (DMF Coagulation)
Wet process PU leather is produced by dissolving PU resin in DMF and coagulating in a water bath to form a microporous structure. Polyester polyols are widely selected due to their superior mechanical strength, strong grain adhesion, and excellent abrasion resistance.
- Preferred Polyol: Linear polyester, medium molecular weight
- Performance Focus: Tear strength, surface durability
- Industries: Footwear uppers, upholstery, industrial fabrics
Dry Process PU Leather
Dry process systems involve direct coating of PU resin onto release paper or textile substrates followed by thermal curing. Balanced molecular weight polyester polyols provide improved surface hardness, scratch resistance, and controlled gloss levels.
- Polyol Type: Polyester with optimized OH value
- Key Properties: Abrasion resistance, grain definition
- Applications: Bags, fashion leather, decorative laminates
Microfiber PU Leather Systems
Microfiber synthetic leather requires uniform pore formation, excellent flex crack resistance, and long-term hydrolysis stability. Polyester polyols ensure high mechanical integrity, while polyether segments may be introduced to enhance moisture resistance in demanding environments such as automotive interiors.
- Key Requirements: Flex resistance, tear strength, softness
- Industries: Automotive seating, premium upholstery
Customized PU Resin Systems for Production Lines
In addition to polyester polyol manufacturing, Enviol Polytech Solutions supplies customized PU resin systems tailored to artificial leather production parameters. Our systems are designed to ensure viscosity stability, controlled reactivity, and consistent film formation in continuous coating lines.
- Hydrolysis-resistant grades for humid environments
- Soft-touch and high-elasticity formulations
- High abrasion and scratch-resistant systems
- UV-stable aliphatic systems (HDI/IPDI based)
- Automotive-compliant interior grades
Polyester vs Polyether Selection in Artificial Leather
- Polyester Polyols: Higher mechanical strength, superior abrasion resistance, better solvent stability.
- Polyether Polyols: Enhanced hydrolysis resistance and low-temperature flexibility.
- Aromatic Systems (MDI/TDI): Cost-effective and mechanically robust.
- Aliphatic Systems (HDI/IPDI): UV stable and non-yellowing for premium segments.