Coating and lamination are different processes
A PU coating is applied as a liquid formulation to a fabric surface, usually the back, and then cured. TPU lamination bonds a pre-formed thermoplastic polyurethane membrane to a face fabric. A lining may be added separately in a 2-layer garment, while a 3-layer construction bonds an inner textile backing to the membrane.
Both routes can be engineered for weather protection, but they differ in structure, feel, production variables and suitable end uses. The correct choice begins with the garment requirement, not with the assumption that one process is universally better.
Side-by-side sourcing comparison
| Point | PU coating | TPU lamination |
|---|---|---|
| Structure | Coating formed directly on fabric | Pre-formed membrane bonded to fabric |
| Common formats | Single coated shell; lining may be separate | 2-layer or 3-layer laminated fabric |
| Hand and drape | Can range from light to firm depending on formula | Influenced by membrane, adhesive, face and backing |
| Breathability route | Depends on coating chemistry and application | Hydrophilic or microporous membrane options |
| Typical use | Rainwear, covers, windbreakers, cost-sensitive shells | Technical jackets, hardshells, softshells, ski wear |
| Key risk to control | Coating uniformity, adhesion and hydrolysis | Bond strength, membrane compatibility and delamination |
When PU coating is useful
PU coating can be a practical option for straightforward water-resistant or waterproof constructions and for projects where low bulk, cost control or a particular hand feel is important. Coating weight and formulation can be adjusted, but every change may affect breathability, stiffness, surface appearance and durability.
Buyers should ask whether the coating is clear, milky or colored, whether it is applied once or multiple times, and how the required waterproof value is controlled. Storage conditions and hydrolysis resistance may matter for humid markets or long product life cycles.
When TPU lamination is useful
TPU membranes are frequently used in 2-layer and 3-layer apparel fabrics requiring a defined waterproof-breathable structure. The membrane can be paired with a stretch face and compatible backing, making it suitable for shells that need mobility and comfort as well as weather protection.
Membrane thickness alone does not describe performance. Adhesive coverage, curing, fabric porosity and backing selection influence breathability, bond strength and hand feel. If stretch is required, the whole laminate—not just the face fabric—must recover effectively.
Understand 2-layer and 3-layer formats
- 2-layer: face fabric plus membrane; the garment usually adds a loose lining or protective print.
- 2.5-layer: face and membrane plus a printed or raised protective treatment on the inside.
- 3-layer: face, membrane and textile backing bonded into one stable fabric.
- Bonded softshell: woven face combined with knit or fleece; a membrane may or may not be included.
Do not compare performance numbers without context
Waterproof and moisture-vapor values depend on test method, specimen conditioning and laboratory procedure. Ask the supplier to state the method and unit, and verify that the report covers the exact approved construction. A garment also requires compatible seam tape, seam design and workmanship to achieve reliable rain protection.
Performance after washing, flexing and aging may be more relevant than an initial value. Define any durability testing before order confirmation, especially for repeated-use technical apparel.
Buyer checklist for a clear quotation
- Face composition, construction, weight, width and target color.
- PU-coated, 2-layer, 2.5-layer or 3-layer format.
- Membrane material and stretch requirement.
- Waterproof, breathability and bond-strength test methods.
- Inner backing or separate lining plan.
- Hand feel, surface finish, MOQ and compliance requirements.