Views: 0 Author: Jason Hong Publish Time: 2026-11-07 Origin: Site
A knitting mill may receive two enquiries that both request “double jersey fabric,” yet one buyer needs elastic rib for cuffs and waistbands while another needs smooth interlock for babywear or polo shirts. Quoting both orders from the same general machine description can create problems with fabric appearance, output, yarn consumption and finishing.
Rib and interlock are related double-knit structures, but they are not interchangeable. The correct commercial decision begins with the buyer’s end product and required fabric performance, then moves backward to gauge, diameter, needle arrangement, cam configuration, yarn feeding and take-down.
Rib fabric is recognized by vertical ribs formed by alternating face and reverse stitches. A basic 1×1 rib alternates one face wale with one reverse wale; other arrangements, such as 2×2 rib, change the width and appearance of the rib lines.
The structure can stretch significantly across the fabric width and recover toward its original shape. This makes rib commercially important wherever a garment must fit closely or return after extension.
Common applications include:
T-shirt and polo collars
Sleeve cuffs and sweatshirt waistbands
Underwear and fitted tops
Leggings and stretch garments
Rib body fabrics for fashion products
Trim components matched to fleece or jersey garments
Elastane may be plated when the buyer requires stronger recovery, closer fit or improved shape retention. However, the mill must confirm the elastane specification and feeding arrangement instead of assuming that every rib order needs the same percentage.
Interlock combines two coordinated knitting systems to create a double-sided structure. The fabric normally presents a smooth knit appearance on both sides and is generally denser and more dimensionally stable than basic rib.
Typical applications include:
Underwear and nightwear
Babywear and children’s clothing
Polo shirts and premium T-shirts
Uniforms and workwear
Sports and leisurewear
Linings, technical layers and stable garment panels
Interlock is attractive when the customer needs a clean surface, balanced construction, coverage and stability. The exact handle still depends on yarn material, yarn count, stitch length, gauge, finishing and any elastane content.
Decision factor | Rib fabric | Interlock fabric |
|---|---|---|
Visual character | Distinct vertical ribs | Smooth knit appearance on both sides |
Main performance advantage | Widthwise stretch and recovery | Stability, coverage and balanced appearance |
Typical products | Collars, cuffs, waistbands and fitted garments | Underwear, babywear, polos, uniforms and sportswear |
Fabric body | Flexible and elastic | Usually denser and more substantial |
Edge behaviour | More stable than single jersey but depends on structure | Generally stable and resistant to edge curling |
Elastane use | Common for close-fit or recovery requirements | Used when additional stretch or recovery is specified |
Production priority | Clear rib definition and uniform elasticity | Even surface, stable stitch formation and balanced fabric |
Purchasing focus | Rib arrangement, gauge and recovery target | Needle timing, surface quality, gauge and production stability |
These are general tendencies, not finished-fabric guarantees. Dyeing, heat setting, compacting and relaxation can change width, GSM, shrinkage and handle.
For garment trims, the mill should confirm the body fabric that the rib must match. A cuff may need to match the colour of fleece or single jersey while providing greater recovery. The buyer may also specify relaxed width, extended width and recovery after repeated stretching.
For body fabric, interlock may create more value because both surfaces are usable and the structure offers good coverage. Mills serving babywear or underwear orders should also evaluate softness, yarn quality, finishing chemicals and dimensional stability rather than focusing only on machine output.
In India and Bangladesh, factories supplying large garment programs may value repeatability and rapid style change. In South American markets, mills producing smaller and more varied orders may place greater importance on configuration flexibility. In both cases, the machine should be selected from the actual order mix—not from a single sample that may not represent future demand.
Some double jersey machines can be converted or configured for multiple rib, interlock and 8-lock structures. That does not mean every machine can change between them by adjusting one setting.
Depending on the machine design, a conversion may require different cams, needle arrangements, dial settings, timing, feeders or other knitting elements. The conversion time, technician skill and spare-part package should be discussed before purchase.
A mill focused on high-volume plain interlock may prefer a configuration optimized for interlock productivity. A factory handling rib, thermal, double-face and other structures may benefit more from a flexible multi-track configuration, even if maximum output for one basic fabric is not the only priority.
Equipment manufacturers similarly distinguish between configurations optimized for plain interlock and flexible machines supporting rib, interlock and other double-knit structures.
Before requesting a quotation, provide the supplier with the following information:
Required structure: 1×1 rib, 2×2 rib, plain interlock or another double-knit design
Yarn material and yarn count
Greige and finished GSM
Required finished width
Fabric use: trim, body fabric, underwear, sportswear or another product
Gauge and machine diameter, if already specified
Elastane type and plating requirement
Tubular or open-width finishing route
Required roll diameter and roll weight
Expected order size and changeover frequency
The supplier should then confirm cylinder and dial specifications, feeder quantity, cam tracks, yarn-feeding arrangement, take-down range and realistic running conditions for the target fabric.
Do not approve the machine using only a generic rib or interlock sample. Run a trial with the planned yarn and inspect:
Rib-line definition or interlock surface evenness
GSM and width consistency across the roll
Stitch length and yarn-feeding stability
Elastane plating position, if applicable
Needle lines, barre, holes or dropped stitches
Fabric tension and take-down uniformity
Roll formation and edge condition
Shrinkage and dimensional stability after the intended finishing process
Record the machine settings and retain the approved greige and finished samples. If the mill expects frequent structure changes, a changeover demonstration should also be part of acceptance.
Rib is the stronger opportunity when customers need elastic trims, fitted garments or visible vertical texture. Interlock is often the better option for smooth, stable and substantial body fabrics used in underwear, babywear, polo shirts, uniforms and sportswear.
The investment decision should therefore be based on the mill’s target products, required flexibility and downstream process. Machine speed matters, but only after the configuration can reliably produce the correct fabric.
If you are planning rib or interlock production, send HENGYE Machinery your fabric sample together with the yarn count, GSM, finished width, gauge, elastane requirement and finishing route. Our technical team can review the target structure and recommend a suitable double jersey circular knitting machine configuration before quotation.
