PU vs TPU Coating: Waterproof Membrane Comparison
PU coating is cost-effective with good waterproofness (5,000-15,000mm HH) and moderate breathability. TPU lamination offers superior durability, better elasticity, and higher waterproofness (10,000-30,000mm HH) at higher cost. TPU is preferred for premium outerwear; PU for mid-range and budget applications.
PU coating is cost-effective with good waterproofness (5,000-15,000mm HH) and moderate breathability. TPU lamination offers superior durability, better elasticity, and higher waterproofness (10,000-30,000mm HH) at higher cost. TPU is preferred for premium outerwear; PU for mid-range and budget applications.
Definition
PU (polyurethane) coating applies liquid polymer to fabric surface. TPU (thermoplastic polyurethane) is a pre-formed film bonded to fabric via heat and pressure. Both create waterproof barriers with different properties.
Problem
You are choosing between PU coating and TPU lamination for your waterproof fabric. The cost difference is significant but you need to know which provides the right performance for your product.
Sådan virker det
PU coating is a wet or dry process where liquid polyurethane is applied directly to the fabric surface. It penetrates the fabric structure, creating a bonded waterproof layer. PU is cost-effective but can delaminate over time and has limited stretch. TPU lamination uses a pre-formed thermoplastic polyurethane film bonded to the fabric with heat and adhesive. TPU films are more elastic, durable, and provide higher hydrostatic head ratings. They also maintain performance better at low temperatures.
Løsning
Choose PU coating for: moderate waterproof requirements (5,000-10,000mm), cost-sensitive products, and applications where stretch is not critical. Choose TPU lamination for: high waterproof requirements (10,000-30,000mm), premium outerwear, applications requiring stretch and recovery, and cold-weather use.
Vigtigste sammenligninger
Relaterede guides
Vores anbefaling
Seekingtex offers both PU coated and TPU laminated fabrics. For most outdoor and sportswear applications, our TPU laminated fabrics provide the best balance of performance and value. PU coating is ideal for entry-level and budget-conscious products.
Ofte stillede spørgsmål
Which lasts longer, PU or TPU? ▼
TPU lamination typically lasts longer because the pre-formed film is more durable and resistant to hydrolysis than PU coatings.
Is PU coating or TPU lamination more breathable? ▼
Both can achieve similar MVTR ratings. Microporous versions of both technologies exist with enhanced breathability.
Can PU coated fabrics be recycled? ▼
PU coating complicates recycling because the coating must be separated from the fabric. TPU lamination can be designed for recyclability more easily.
Which is better for stretch fabrics? ▼
TPU lamination is better for stretch because TPU films have inherent elasticity. PU coatings are less elastic and may crack with repeated stretch.