Binding Tape CoA: Check

Match binding tape CoA rows to grade and lot. A non woven binding tape CoA is useful only when the buyer can connect its results to the correct grade, specification revision and supplied rolls. Review the value type, unit, method and acceptance limit before checking pass or fail. A certificate should support lot release, but it cannot replace product qualification or application evidence.

Conceptual quality-document review; not a Chaowang certificate or inspection record.

Start a Non Woven Binding Tape CoA Review with the Exact Grade

Do not approve a document that says only “nonwoven tape.” Jiangsu Chaowang New Material publishes CW-1 non-woven binding tape as grades CW-1-20 through CW-1-80. Each grade occupies one complete row with mass per unit area, thickness, tensile strength, elongation, short-term stability, long-term stability and moisture content. The grade on the purchase order, CoA and roll identification should match.

Record the controlled document identifier and revision used for the order. The public page does not publish a CoA template, sampling frequency or standard certificate fields. Agree those items before ordering; do not assume every published property will appear as a lot result.

• Material identity: supplier, product family, exact CW-1 grade and agreed construction.
• Document identity: purchase specification, TDS or approved data sheet, revision and effective date.
• Supply identity: purchase order, lot or batch reference, roll reference and quantity represented.
• Release identity: issue date, disposition and the responsible quality authorization defined by the parties.

Preserve Limits, Units and Test-Method Editions

A result is meaningful only beside its acceptance rule. In the CW-1 table, mass and thickness use “±” tolerances, tensile strength and elongation use “≥” minimums, and moisture uses a “≤” maximum. Do not convert these symbols into typical values.

Conceptual property comparison; no values shown are Chaowang test data.

Method editions matter. The CW-1 page names ISO 9073 parts for several physical properties without edition years. The current ISO catalogue lists ISO 9073-1:2023 for mass per unit area, ISO 9073-2:1995 for thickness under specified pressure, and ISO 9073-3:2023 for strip-method breaking force and elongation. Record the edition and any agreed options so two reports are not treated as comparable merely because they share a part number.

The public table also names ISO 287 for moisture, “Hytest-5” for short-term stability and IEC 216 for long-term stability. The official ISO 287:2017 scope is paper and board, while current IEC thermal-endurance publications use the IEC 60216 series. This does not invalidate a supplier procedure; it means the purchase record should state the exact controlled method, edition, specimen condition and reporting rule. Do not interpret a listed temperature as a cable service rating without separate evidence.

Reconcile the TDS, Purchase Specification, CoA and Roll Label

These documents have different jobs. A technical data sheet describes the product. The purchase specification defines the order requirements. A CoA reports agreed lot results or dispositions. Physical roll identification connects the material to those records. Matching values cannot repair a broken identity chain.

1. Build a master row. Copy the exact property name, unit, limit, method and edition from the approved purchase specification.
2. Map the supplier row. Confirm that terminology and units are equivalent; document any conversion rather than overwriting the source value.
3. Check the certificate. Distinguish measured results, calculated results, conformity statements and fields not tested for that lot.
4. Check the material. Match grade and lot references across the CoA, packing identification and each roll or traceable roll group.
5. Resolve differences. Hold the release until an authorized clarification, corrected document or approved concession closes the mismatch.

The wider Chaowang non-woven cable tape range contains grades with different declared functions. Identity control prevents a visually similar roll from being released against the wrong family. For example, CW-5 water-blocking tape has a different composition and property set; its documentation is not interchangeable with CW-1.

Release the Lot with Traceability and Change Control

A practical record links the accepted lot to its order, certificate, packing identification, receipt inspection and retained sample where the quality plan requires one. Define how long records and retained samples are kept, who can release a deviation and how affected rolls are located. These are buyer-supplier agreement items; the public CW-1 page does not state Chaowang’s internal retention or change-control procedure.

Conceptual traceability scene; not a Chaowang warehouse, label or retained-sample record.

Agree which changes require notification or requalification. Relevant examples may include a grade definition, raw-material system, manufacturing location, test method or edition, acceptance limit, roll format, label format or certificate layout. The list should be project-specific and documented; it is not evidence that any such change has occurred.

A CoA cannot by itself prove storage history after dispatch, compatibility with every adjacent material, stable performance on the buyer’s equipment, or finished-cable compliance. Use an approved sample for initial qualification and the agreed lot evidence for routine release. If a result is absent, do not replace “not reported” with zero or assume that a conformity statement represents an individual measurement.

Frequently Asked Questions

What should a non woven binding tape CoA contain?

At minimum, request the exact grade, specification revision, lot reference, issue date and the agreed property rows with units, methods, limits and results or stated disposition. Roll-level references, quantity represented, sampling basis and authorization should be included when the purchase quality plan requires them.

Is a TDS the same as a CoA?

No. A TDS describes a product and may show nominal, minimum, maximum or reference properties. A CoA relates agreed results or conformity statements to a defined lot. The purchase specification should state which TDS revision and which lot-release fields govern the order.

How should ±, ≥ and ≤ values be reviewed?

A “±” value creates a two-sided range around a nominal. “≥” sets a minimum, while “≤” sets a maximum. Preserve those meanings in the comparison sheet and certificate. Never replace them with a simple target or average, because that changes the acceptance rule.

Must every published CW-1 property be tested for every lot?

Not necessarily. Routine, periodic and qualification tests may follow different frequencies. The buyer and supplier should agree which properties are measured per lot, which receive a conformity statement, which are periodic, and what sampling plan applies. The public product table does not define that certificate schedule.

What if a test method has no edition year?

Ask which edition and options were used, then compare them with the approved purchase specification. This is important when a standard has been revised or offers alternative specimen widths, conditions or procedures. Record the clarification rather than silently assuming the latest edition or equivalent results.

Can a passing CoA replace a sample trial?

No. A CoA supports identity and agreed lot properties under stated methods. It does not establish suitability for every cable design or process. Approve a representative sample under the intended conditions first, then use traceable lot documents and receipt checks to support routine material release.

For a project-specific non woven binding tape CoA review, send Jiangsu Chaowang New Material the required CW-1 grade, purchase-specification revision, property limits, test-method editions, roll identification needs and requested certificate fields. Ask for the current controlled datasheet and sample-document format before approval.