September 24, 2026
Dimensional Stability & Shrinkage Control in Modal and Jersey Hijabs: Technical Factory Specifications
Key Takeaways· Written for Technical textile buyers, quality control inspectors, and product development managers
- Untreated knit jersey and regenerated cellulose modal fabrics naturally shrink 8–12% upon first home laundering.
- Factory compacting and controlled stenter frame heat-setting reduce dimensional change to <= 3.0% under ISO 6330 standards.
- Adding 5% high-grade Roica or Creora elastane to modal provides stretch recovery exceeding 92% after 30 wear cycles.
- QIUYAN tests shrinkage on every batch with pre-wash and post-wash dimensional tracking before bulk cutting.
One of the most persistent technical quality issues in knitted modest wear is dimensional instability—scarves that shrink significantly in length, stretch out of shape, or develop severe edge curling along raw hems after washing.
To deliver consistent draping quality across repeat consumer purchases, textile manufacturers must apply rigorous mechanical and chemical stabilization during the finishing phase.
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1. Shrinkage Mechanisms in Knitted Hijab Fabrics
Modal is an extruded cellulosic fiber with high water absorbency. When immersed in water, the fibers swell laterally and contract longitudinally:
- Greige Contraction: Raw knit jersey fresh off circular knitting machines exhibits 10–14% relaxation shrinkage.
- Curling Torque (Spirality): Single-jersey knit structures have natural structural torque that causes the cut edge to roll into a tight tube if yarn twist is not thermally balanced.
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2. Industrial Stabilization Processes at QIUYAN
To guarantee commercial dimensional stability meeting European and American retail benchmarks:
- Pre-Setting on Stenter Frames: Fabric passes through high-temperature stenter chambers at 180°C–190°C under calibrated overfeed tension to lock yarn geometry.
- Felt Compacting: Greige fabric undergoes compressive shrinkage on rubber-belt compactors, mechanically pre-shrinking the fabric loops so that subsequent home washing causes negligible length loss.
- Steam Finishing & Relaxed Drying: Tensionless loop dryers allow fibers to relax naturally without residual internal stress.
Performance Specifications: - Dimensional Change After Laundering (ISO 6330 / AATCC 135): Length: $le$ $pm$ 3.0%; Width: $le$ $pm$ 2.5%. - Spirality / Torque (ISO 16322): $le$ 2.0%, preventing twisting around the neck during wear. - Elastic Recovery (ASTM D3107): $ge$ 92% after 1 hour relaxation following 30% elongation.
Frequently Asked Questions
+How do you prevent jersey hijabs from curling at the hem?
We utilize baby overlock stitching, laser-cut bonded edges, or micro-hem folds with balanced tension. Additionally, the fabric undergoes thermal twist-neutralizing finishing to eliminate intrinsic spirality.
+What care instructions should be printed on the care label?
We recommend: Machine wash cold (30°C) on gentle cycle, wash with like colors, do not tumble dry, low iron if needed. Following these parameters ensures zero noticeable shrinkage over the garment lifetime.
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