Views: 1 Author: Site Editor Publish Time: 2026-10-27 Origin: Site
Buyers ask for flame retardant hook and loop as if it were one product with one certificate. It is not. Three industries specify it three different ways, and a tape that passes one test tells you almost nothing about the other two. Getting this wrong is expensive: the sample passes, the pilot run passes, and the audit fails because the report was for the wrong specimen.
Under FMVSS 302 the specimen is held horizontally and ignited at one end; the material passes if the flame front does not exceed 102 mm per minute, or if it self-extinguishes before reaching that point. China's GB 8410-2006 measures the same horizontal characteristic and is what domestic OEM programmes usually cite.
Two details matter more than the headline number. First, the specimen form: a bare hook tape and a tape with adhesive backing are two different specimens, and the adhesive is frequently the part that burns. Second, direction: hook face up versus loop face up can change the result on the same roll.
Cabinet and appliance programmes usually ask for UL 94 rather than a burn rate. In the vertical test, V-0 requires each specimen to stop burning within 10 seconds and prohibits flaming drips that would ignite cotton placed below. That is a harsher question than a horizontal burn rate — it is about whether the material keeps a fire going once it is hanging vertically in an airflow.
Rail projects reference EN 45545-2 and then name a requirement set — R22 and R23 are the ones that come up for interior components. Those sets combine several fire tests rather than one burn rate, and the hazard level of the vehicle decides which set applies. If a customer says "EN 45545" without a requirement set and a hazard level, the requirement is not yet defined; ask before quoting.
Approach | How it works | Trade-off |
|---|---|---|
Inherently flame-retardant yarn | Retardancy built into the fibre itself | Highest cost, but holds through washing and abrasion |
Back coating | Retardant compound applied to the back of the tape | Cheaper; performance depends on coating weight and can drop after washing |
Adhesive layer only | Retardant added to the adhesive, base fabric untreated | Only valid if the test specimen includes the adhesive |
All three reduce peel strength to some degree, because a retardant coating or additive interferes with the bond at the interface. Expect to give up some peel and to gain stiffness. If a supplier claims flame retardancy with no change to peel values, ask for the two reports side by side.
Specimen form: bare tape, tape with adhesive, or tape sewn to your fabric
Mass per unit area: a report at a different gsm does not cover your item
Test house and report number: verifiable, not a scanned certificate without a reference
Batch correspondence: whether the report was run on a production lot or a lab-prepared sample
The base fabric was tested, the adhesive was not. This is the single most common gap. A flame-retardant loop tape with a standard adhesive backing becomes a non-compliant assembly once the adhesive is included in the specimen.
Washing resets the clock. Back-coated products can lose retardancy after repeated laundering or dry cleaning. If the part is in a washable textile — a medical strap, a wearable, a seat cover — the requirement should be stated after the wash cycles, not before. Our washing and disinfection article covers what laundering does to the closure itself.
Application, the standard and requirement set you are being held to, specimen form the auditor will use, and the temperature at the mounting point. The standard flame-retardant build is on the high-temperature flame-retardant tape page, and automotive programmes usually pair it with the automotive range. If the requirement is a requirement set rather than a burn rate, send the clause and we will match the construction to it.
