Shengze, in Wujiang District of Suzhou, has long been known as one of China's densest textile towns — "ten thousand bolts a day, clothing the world." The concentration of weaving and chemical fibre capacity has produced a complete finishing ecosystem: greige fabric, membranes, chemicals and testing all sit within a one-hour industrial radius. For buyers this means two things: many process options (dry coating, wet coating, transfer coating, membrane lamination, functional finishing are all available locally), and a short supply chain that lowers communication and logistics cost from fabric selection to shipment.
But "findable" is not the same as "right." Finishing decides the final performance of a fabric: the same greige base, processed by different mills, can end up with completely different hydrostatic head, moisture vapour transmission and hand feel. This guide separates the process map from the screening method.
The Finishing Process Map: Five Stages That Reveal Capability
1. Dry coating
Dry coating applies a coating compound directly onto the fabric surface and dries it into a film. It is common for PU (polyurethane) and PA (polyacrylate) coatings, used for waterproofing and weight addition in umbrella fabric, bag fabric and trench coat fabric. To judge dry coating capability, look at the range of coating types a mill can handle (PU, PA, barrier coatings) and how it controls coating uniformity.
2. Wet coating
Wet coating forms the film by coagulation, producing a more breathable, softer film — typically used where high moisture vapour transmission is required. Wet processing demands tighter control of process parameters, and not every finishing mill runs a wet line. Whether a wet coating machine appears on the equipment list is a direct capability signal.
3. Transfer coating and roller printing
Transfer coating casts the film on release paper first and then transfers it, which gives a finer surface and is often used for synthetic leather-type fabrics. Roller printing applies functional or decorative patterns during the coating step. Both demand substantial equipment and experience.
4. Membrane lamination
Lamination bonds fabric to a functional membrane (TPU, PU, PTFE, PE). The waterproof and breathable performance of shell jackets, ski wear and mountaineering apparel depends mainly on this step. Assess lamination capability on three points: the range of membranes a mill can process, the number of lamination lines, and its experience with each membrane type. Process and membrane are two different things — membrane performance is set by the membrane itself, while the laminator's value lies in bond quality and consistency: bubbling, delamination and insufficient peel strength are all lamination issues.
5. Functional finishing
Beyond coating and lamination, a finishing mill can add functions by padding and related processes: water/oil/stain repellency, soil release, moisture wicking, quick dry, UV protection, cooling hand feel, insect repellency, negative ion far-infrared and more. The hard part of functional finishing is durability — how much of the effect survives repeated washing is the number worth asking about.
Supplier Screening: Five Things a Buyer Should Verify
1. Equipment and line list
A well-run finishing mill states its equipment clearly: dry coating lines, wet coating lines, lamination machines, transfer coating machines, small wet coating machines and so on. Equipment determines process boundaries — a mill without a wet line cannot take high-transmission orders. If a plant also covers greige weaving, coating, lamination, transfer coating, roller printing and specialised calendering, it has one-stop capability and a shorter path from sampling to bulk.
2. Testing capability
Finishing performance has to be expressed in data. Mills worth prioritising run their own testing centre with hydrostatic head testers, moisture vapour transmission testers, spray rating testers, wash testing equipment and fabric strength testers — exactly the metrics buyers care about at inspection. Being able to test in-house means process tuning has a data feedback loop rather than relying on feel. Some plants have added in-line quality control: incoming material screening, in-process inspection and final inspection — three visual gates that push traceability down to every roll.
3. Certification systems: a screening filter
Certification is a quick way to gauge compliance. Buyers should check these categories:
- Recycled material certification: GRS (Global Recycled Standard) and RCS (Recycled Claim Standard), covering processing and trading of recycled fabrics — the entry requirement for recycled orders.
- Management systems: ISO 9001 (quality), ISO 14001 (environment) and ISO 45001 (occupational health and safety) — the baseline of management discipline.
- Sustainability assessment: Higg FEM (Facility Environmental Module) and Higg FSLM (Facility Social and Labor Module) are supply chain assessment tools widely accepted by international brands and verified through the Worldly platform.
- Social compliance: SLCP (Social & Labor Convergence Program) replaces repeated audits with a unified data collection process and is increasingly adopted by brands.
- Product safety and chemical management: OEKO-TEX® STANDARD 100 (harmful substance testing) and bluesign® SYSTEM (input-side chemical management of environmental impact and resource productivity) — the two systems most often checked when international brands screen outdoor and functional fabric supply chains.
Two cautions when checking certification: the certified scope must match your order category (certification is granted by process scope), and certificate status can be verified on the issuing body's website.
4. Sampling and order flexibility
Big mills are not always willing to take small orders. For buyers developing new fabrics, whether a mill has its own sampling centre, how fast it can produce samples and what the minimum for trial orders looks like often matters more than capacity. This is also why many brands place functional fabric development with specialist finishing mills rather than large weaving mills — the response speed of process adjustment is different.
5. Source of chemicals and raw materials
Functional finishing performance is directly linked to the chemical supplier. Leading international chemical suppliers (such as DuPont, Clariant, 3M, Huntsman) run technical audits of partner mills; a long-term working relationship with these brands is itself supporting evidence of process capability.
Conclusion: The Right Way to Find a Mill in a Cluster
When looking for a finishing partner in a cluster like Shengze, the recommended path is: first lock the process stage by requirement (coating, lamination or functional finishing), then verify capability against the equipment, testing and certification checklists, and finally validate actual delivery quality with a small trial order. Directories and platforms are a starting point, but the final judgment should rest on the mill's own process documentation and test data.
About TTK
Suzhou TTK Textile Technology Group Co., Ltd. was founded in 2001 in Shengze, Suzhou, a renowned Chinese textile town. It is a manufacturing enterprise focused on textile finishing, formerly known as Wujiang Tutaike Textile Finishing Co., Ltd. TTK provides one-stop contract processing: coating (PU/PA), lamination (TPU/PU/PTFE/PE membranes), waterproof and breathable finishing (PD/WR) and a range of functional finishes, with dry coating lines, wet coating lines, lamination machines and transfer coating machines, plus a sampling centre and a testing centre (hydrostatic head, moisture vapour transmission, spray rating). TTK is a bluesign® SYSTEM PARTNER able to coat and laminate bluesign® APPROVED fabrics, holds GRS v4.0 and RCS v2.0 certification and OEKO-TEX® STANDARD 100 certification, is certified to ISO 9001/14001/45001, and has completed Higg FEM 2025 and Higg FSLM 2026 assessments. Outdoor functional fabrics (nylon-cotton Oxford, taslan, four-way stretch, pongee) are a key product direction, serving shell jackets, ski wear and mountaineering apparel. TTK owns the fabric brand Tolrite® and the technology function brand TicTak™.
Website: https://www.szttk.com.cn