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The Engraved-Roller Envelope: Which Cut Your Applicator Can Actually Hold
Every chemistry page asks what you are bonding. None asks what is applying it — and that machine was bought before the adhesive was. Your applicator caps the usable particle size before chemistry is on the table.
What the published record actually says
| Application route | Add-on the disclosure reports | Source |
|---|---|---|
| Paste-dot base layer | ~5–6 g/m² dry | US5677038A |
| Double-dot (base + scattered upper) | 2+5 = 7 g/m² on a 35 g/m² polyester knit | US6300413B1 |
| Double-dot, heavier constructions | 5+7 = 12 and 6+8 = 14 g/m² | US6986935B2 |
| Engraved-roller line | “aiming to achieve add-on weights of from 10 to 15 g/m²” | US5902843A |
| Scatter head + sinter oven | Non-adhering powder blown off and extracted by suction — no recovery rate is published anywhere | — |
Basis, stated plainly. The add-on figures above are what the cited patent disclosures report for those routes — they are not Teng Yang measurements and not a promise about your line. No published rule states the governing ratio between engraving cell depth and maximum usable particle size for interlining; the interlining patents co-specify dot density and powder grading and never name the relationship between them. The one explicit ratio rule we located governs gravure coating of liquid dispersions in another industry, so it does not transfer. This tool narrows the question. Your roller gauge answers it.
Send your roller gauge and add-on target — we’ll name the cut
Aperture designations and their tolerances are on the hot melt adhesive powder hub.
