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Author：KUNYUAN Machine Manufacturer TIME：2026-10-22
A cuff must pass over the intended body part, return toward its required shape and join the garment acceptably. None of those outcomes follows directly from the nominal diameter printed in a machine catalogue.
Use this recommended buyer trial for a specified cuff construction, yarn combination and make-up route. The machine supplier must confirm that the proposed platform can produce the required tube or component. Published seamless applications provide context but cannot establish an untested cuff size or elastomer recipe.
Record relaxed geometry, the intended opening event, the laboratory method and the garment acceptance criteria in different fields. This prevents the common shortcut of treating a hand stretch as both a sizing test and a quantified recovery result. The route ends with a joined cuff assessed after the agreed care process.
Begin with the garment drawing and identify what the cuff must pass over, its relaxed opening, required depth and joining edge. State whether a measurement is circumference, laid-flat width or another dimension, and describe how folds or doubled layers are handled. Retain the specimen's condition when measured. An unlabeled width becomes especially misleading when different teams interpret it as a finished circumference.
Ask the supplier to map this component to the exact machine and construction proposed, including any subsequent cutting or joining. Do not turn a catalogue diameter range into a finished size chart. Where the proposed smallest or largest commercial cuff has not been demonstrated, mark it unqualified. A buyer may choose representative and boundary samples for development, but the actual selection and acceptance limits must be agreed for the order rather than invented by an article.
Have the laboratory state whether it will evaluate fabric strips, complete openings or both. Record direction, fixture, loading or extension basis, duration, repetitions and observation intervals. These are method fields to agree, not values prescribed here. A folded cuff or seam-containing opening must not be reported as an ordinary flat specimen without explaining the preparation and what the result represents.
The public ASTM D2594/D2594M scope distinguishes stretch under load from growth after extension is removed and concerns low-power fabrics. It also directs some support applications toward other methods and cautions about commercial acceptance. Use a suitable full procedure and identify any buyer-specific component test as such. Do not attach an ASTM label to a workshop demonstration that merely borrows the words stretch and recovery. Keep method applicability in the laboratory's signed report.
Write the initial dimension, the defined extended condition and each subsequent returned dimension in the same specimen row. Include units, timestamps or intervals, specimen direction and the actual observation method. If a percentage is reported, show its denominator and formula in the laboratory report. Recovery expressed relative to the original length is not interchangeable with recovery expressed relative to the applied extension.
Review individual cuffs before summarising the group. Flag slipping in the fixture, seam failure, edge rolling or an interrupted observation, and state whether a result was excluded. Do not replace excluded data silently. Compare the measured response with the buyer's functional brief and with the agreed test repeatability. A highly extensible opening can still retain too much growth; a short returned dimension can still accompany an opening force that the intended wearer cannot comfortably use.
Attach the cuff to the intended sleeve or garment component using the actual production route. Record joining-edge compatibility, the finished opening and visible distortion. Run the agreed care sequence, condition the sample and repeat the specified component observations. Keep the unjoined fabric result available so an assembly problem is not automatically blamed on the knitting trial.
The release record should name the cuff construction, yarn and elastomer identities, machine or recipe reference, join and care route. Define which size and colour combinations the evidence covers. Retain an unresolved branch for a proposed boundary size that failed or was never sampled. Revisit the trial when a substantive input changes. This makes the commercial offer honest: the supplier demonstrates a particular cuff route, while the buyer decides whether that demonstrated result satisfies the intended garment.
| Stage | Raw evidence | Decision field | Avoid |
|---|---|---|---|
| Geometry | Circumference or width with state | Required opening | Diameter becomes size chart |
| Method | Specimen, direction, fixture and timing | Applicable evaluation | Hand pull labelled standard test |
| Response | Initial, extended and returned dimensions | Growth and functional fit | Unstated percentage basis |
| Assembly | Join, care and repeat observations | Released component combinations | Untested boundary claims |
None. Finished dimensions must be demonstrated on the proposed machine, construction and finishing route; nominal diameter is not sufficient evidence.
No. The extended state and the dimension remaining after release answer different questions and need separate observations.
Only through a method that addresses its actual specimen form. Explain folds, seams and fixture effects and identify any component-specific adaptation.
Use the product brief and an appropriate agreed method. A threshold without specimen, timing and calculation basis is not a meaningful acceptance rule.
The join and care route may change the finished opening or create distortion. The garment component needs evidence beyond the unjoined fabric trial.
A defensible cuff trial connects declared geometry to an applicable method and a traceable returned dimension. Assembly and care then test the component the wearer will actually use. This route gives a buyer useful recovery evidence without converting a small-diameter machine label into unsupported finished-size promises.
Use the cuff brief when discussing the Circular Knitting Machine range and request a demonstrated small-diameter component route before accepting any size commitment.
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