Kent State CNC Knitting Study Shows Near-Zero-Waste Route Beyond Apparel

Researchers at Kent State University have produced a puffer jacket, a chair cushion and wall panels from a single knitted structure, using double-bed CNC flat knitting and recycled polyester yarn. The study, published in the IFFTI Annual Proceedings, Volume 2, in April 2023 and highlighted by IFFTI in September 2026, signals a near-zero-waste manufacturing path that spans apparel, furniture and interiors on unchanged machinery.

The paper, Soft Boundaries: Making Spaces, was conducted by Krissi Riewe Stevenson and Jennifer Meakins. It argues that one textile system can serve multiple product categories without fundamentally different manufacturing processes — a claim with direct relevance for suppliers weighing flat-knitting capacity against cut-and-sew lines.

What does the research change on the factory floor?

Digital knitting produces complex three-dimensional shapes directly from yarn, avoiding the offcuts that conventional cut-and-sew generates. The researchers state that stretch, strength, porosity and cushioning can be engineered into the fabric through structure and material selection alone.

The work also shows that structural and tactile properties can be integrated without additional finishing processes or complex assembly. For knit suppliers, that is a cost-side argument, not only a design one.

The takeaway: shaped knitting can displace cutting waste and finishing steps in one operation.

Which materials and methods did the prototypes use?

The prototypes used Unifi's Repreve recycled polyester, made from recycled plastic bottles. According to the researchers, combining recycled inputs with near-zero-waste knitting reduces material consumption and supports products that can be reused, repositioned or repurposed.

The development process followed extensive prototyping and iterative sampling:

• Double-bed digital knitting to build a multilayered, quilted structure resembling puffer-jacket construction
• Exaggerated knitted tubes that can be filled to create volume, cushioning and separation from the body or surfaces
• Computer-aided design plus Clo 3D visualisation to translate the material into three finished products

The takeaway: a single construction, validated across garment, furniture and interior formats, on commercially available yarn.

Why does it matter for sourcing decisions?

The researchers position garments and architectural interiors as sharing core functions — protection, comfort and enclosure — and identify modular, transformable knitted systems that can be customised for particular environments. They argue such systems could extend product lifetimes and support circular design principles.

Future work outlined in the paper includes larger-scale knitted installations and immersive environments combining apparel and architectural elements. Potential applications cited include educational and healthcare settings, where adaptable textile structures could contribute to more responsive spaces.

The takeaway: buyers evaluating recycled-polyester knit programmes can treat this as a documented case of waste reduction plus multi-category versatility from one platform.

For sourcing teams, the decision the study forces is whether near-zero-waste CNC knitting, running on certified recycled polyester, belongs in capacity planning before rivals claim the format.