ForMatter/Finishes/coating/Heat-set (synthetic textile dimensional fix)
finish_coating_heat_set_textile

Heat-set (synthetic textile dimensional fix)

coating · matte · heat-setting, thermosetting, tensilization, Banbury heat-set

Synthetic fabrics — polyester, nylon, polypropylene — held under controlled tension while heated above their glass-transition temperature, then cooled. The fibers lock in the shape they're held at: pleats, creases, dimensional stability for life. Permanent-press shirts, pleated polyester skirts, recycled-PET fleece dimensional set, the wrinkle-free hospitality linens of the 1970s onward.

Fabric or yarn heated to above the polymer's glass transition (Tg ~70 °C for PET, ~50 °C for nylon-6) under controlled tension — typically 180–200 °C for polyester, 170–190 °C for nylon. Polymer chains relax to the strained position, then crystallize as cooled. Permanent crystalline alignment gives dimensional stability against subsequent washing / wear. Process variants: stenter-frame heat-set (fabric clamped at edges, heated in a tunnel oven), autoclave heat-set (textile yarn on bobbin), and live-steam heat-set (low-tension softening for bulk synthetics). Often paired with calendering to lock in the calendered surface character permanently. The technology that made polyester wearable.

character — permanent dimensional shape, wrinkle-resistant, performance-textile register.

Finish properties

  • levelmatte
  • subcategorythermoplastic dimensional stabilization
  • applies totextile

Second life

reversibilitymoderate — most coatings can be stripped chemically (methylene chloride for paint, NaOH for some powder coats) or thermally / mechanically (sandblasting). Some specialty coatings (DLC, ceramic) require commercial-service strip.
blocks substrate recyclingno
renewabilityfield- to shop-renewable — most paint and clear coats can be touched up or re-coated in service; powder coat and PVD coatings require a coating-house re-application.

SSPC / NACE surface-coating standards; manufacturer technical literature for the specific coating chemistry.