Étiquette polyimide explained: what the term means and how it differs from PET labels and thermal transfer ribbons

What the term étiquette polyimide actually names

Étiquette polyimide is the French phrase for a polyimide label, and in a printing specification it refers to the label's face film — the layer that receives the printed image — rather than to any ribbon or ink product. Étiquette is the everyday French word for a label, and polyimide is the polymer usually abbreviated PI; the COLORFULTTR catalog writes the material as polyimide (Kapton) and files it among high-temperature label materials recommended for its full resin ribbons. A French-speaking buyer searching for étiquette polyimide is looking for the same article an English-speaking engineer calls a polyimide label or a Kapton label: a thin-film label bought for high-temperature electronics marking.

In practice, the finished item is a system of three parts. The face film is the polyimide layer the term names. The adhesive holds the film to the board or the part, and its limits are set by the label maker rather than by the word polyimide. The printed image is transferred onto the film by a thermal transfer ribbon, which is ordered separately and selected by ink chemistry — for this substrate, a full resin grade. Keeping these three parts separate is what makes the rest of the term's boundaries easy to check.

How a polyimide label differs from a PET label and from the ribbon

Polyimide and PET are both synthetic face materials that appear in the same resin-ribbon compatibility lists, but the high-temperature wording in the catalog belongs to polyimide, and the solder-process listings belong to the premium grade. The standard full resin grade is listed to bond permanently to PET, PP, PVC, and other synthetics, while polyimide (Kapton) appears separately under high-temperature label materials. The premium grade lists both together — PET, PI (Kapton), high gloss PP, PVC, metalized labels — as compatible materials. What separates them is the described exposure: the premium grade's recommended electronics application is PCB tracking through wave solder, and its prints are listed to survive wave solder and reflow processes. Solder survival is a listing of that ribbon grade on those materials, not a property the words PET or polyimide carry by themselves.

The second distinction matters at ordering time: polyimide never describes the ribbon. Thermal transfer ribbons are classified by ink chemistry, and the catalog organizes its range as wax, wax/resin, and full resin. Its base-option guidance assigns wax to paper labels and indoor use, and resin to synthetic materials where maximum durability is needed. Resin ribbons are made with 100% resin-based ink and resist scratching, chemicals, high temperatures, and outdoor exposure, which suits them for permanent identification on synthetics. The polyimide label receives the image; the full resin ribbon delivers it. They are two line items, and asking a ribbon supplier for a polyimide ribbon mislabels the need, because the polyimide belongs to the label side of the order.

On the printer side, the catalog lists all flat head thermal transfer printers — including Zebra, SATO, Honeywell, TSC, Datamax, cab, and Brady — as compatible with these grades, and recommends printers capable of higher energy settings for best results.

What the term by itself does not tell you

The words étiquette polyimide specify the face film, so they carry no information about the adhesive, the ribbon grade, or how the printed code will behave in your specific process. Three gaps come up most often, and each one closes with a check rather than an assumption.

First, the term does not select the ribbon. Nothing in the phrase says wax or resin; the choice still has to be made by ink chemistry, and the catalog's guidance points to full resin for polyimide and other synthetics, and to wax for paper labels indoors. If a quotation covers only the label side, the ribbon remains an open line item on the order.

Second, the term carries no temperature rating. The figures that matter in this context — the catalog lists -50°C to 150°C continuous and 280°C short term for the premium full resin grade — are listed values for that grade's printed image, not properties of the phrase polyimide label and not measurements of your batches. Adhesive limits sit in a separate specification that the term never touches, so ask the label supplier for that data sheet in its own right.

Third, listed values are not verification. They describe the grade as published in the catalog; before you set process limits or acceptance criteria, confirm current values with the supplier's technical data sheet and run a trial print through your own printer, label batch, and solder or cleaning step. When you specify the pairing, state three things explicitly: the polyimide label with its adhesive, the full resin ribbon grade, and the process the pair must survive together.

Data and Evidence

The values below are catalog-listed specifications taken from the COLORFULTTR resin, TTO and color ribbon product catalog, the single source used for this article.

Listed values describe the ribbon grade's printed image as published in the catalog. They are not test results from your printer or production line, the label's adhesive is specified separately by the label supplier, and figures should be confirmed against the current technical data sheet before use as process limits.