Polyester Knit Interlining — Specification, Uses and Sourcing Notes
Polyester Knit Interlining: Specification, Uses and Sourcing Notes
Polyester Knit Interlining is the version buyers specify when the base material is fixed by performance rather than by price. This entry sets out what the material actually changes, which specification to write into the tech pack, and where the cost sits — the three questions that decide whether the item passes bulk approval.
What it is
Polyester gives knit interlining its drape and hand feel. In practice that means the trim behaves differently in cutting, in finishing and in wear: tighter tolerance is needed on the finished dimension. Buyers who specify the material up front avoid the most common failure — an item that looks right on the sample card and behaves differently in bulk.
Typical specification
| Item | Knit Interlining |
|---|---|
| Base material | Polyester |
| Standard size | 8# Gauge |
| Common finishes | Yarn-Dyed Finish, Enzyme Wash Finish, Nickel-Free Electroplating |
| Processes | Anti-Static Finishing, Ultrasonic Welding, PU Coating |
| Typical applications | Blazers, Workwear, Hats, Outdoor Tents |
| Test standard | Sedex SMETA |
| Usual packing | 200 pieces per polybag, 2000 per carton |
Properties that matter in buying
- Dimensional stability — 1% allowance is built into the spec before cutting.
- Colour fastness — tested to Sedex SMETA on the actual base material, not on a substitute.
- Mechanical performance — abrasion resistance after 50 cycles or washes.
- Compliance — Sedex SMETA documentation issued with the shipment.
- Consistency — the approved counter sample becomes the reference for every reorder.
Common uses
- Jackets
- Bedding Sets
- Skirts
- Sportswear
- Yoga Wear
- Backpacks
How to specify it
- Name the base material in the tech pack, not just the item.
- Fix the size and tolerance in writing before sampling starts.
- Approve a counter sample made from the actual bulk base material.
- Order the test report against the standard your market requires.
- Retain a golden sample at the factory and a second one with you.
Related reading
Related specifications on this site cover waterproof seam seal tape, shoulder patch, striped fabric, polyester webbing, and the processes most often paired with knit interlining include uv protection finishing, calendering, rotary printing.
Send the reference sample or tech pack and we will come back with a costed specification, a sampling timetable and the compliance documents your market requires.
