Long-form technical documents for compounding and procurement engineers. Written to be checkable: standards are cited with their edition numbers, and every figure is shown with the conditions it was measured under.
Filter pressure value, why two suppliers' numbers are usually not comparable, and what a lot certificate should actually contain. Covers the method under EN ISO 23900-5, the reference values that are defensible and the ones that are not, the trade-off between dispersion and polymer damage, and a reproducible incoming test protocol you can run without owning a filter pressure rig.
Most technical claims about masterbatch are unfalsifiable by the time they reach a buyer: a dispersion figure with no mesh size, a certificate figure with no method, a carbon content with no test standard. The point of these papers is to make the underlying tests legible, including the parts that are inconvenient for a supplier to explain — such as the fact that a filter pressure value is only valid for the equipment and conditions used to obtain it.
They are written to be used: send the specification checklists to us, or to anyone else you are quoting.
Fifteen pages on the one variable that decides whether a black masterbatch works on your line — how well the carbon black is actually dispersed, and how you measure it.
| Section | What it covers |
|---|---|
| Why dispersion is the specification | Two grades with identical carbon black content and identical MFR can behave completely differently on the same line. The difference is distribution of the primary particles, and it does not appear anywhere on a typical data sheet. |
| Measuring dispersion | Filtration pressure testing, light microscopy on microtomed sections and the practical limits of each. What a “good” number looks like, and how to compare two suppliers on the same method. |
| Defects and their causes | Specks, gels, streaks, die build-up and surface roughness — the mechanism behind each, and how to separate a raw-material cause from a machine cause before you reject a lot. |
| Compounding conditions | Screw geometry, temperature profile, shear history and feed arrangement, and how each shifts dispersion at constant formulation. |
| Carbon black selection | Primary particle size, structure and surface chemistry — the three variables that set what a given black can achieve in a given carrier. |
| Incoming inspection protocol | A short, practical routine for checking a shipment: what to sample, what to measure and what to record, so that a dispute six months later has a factual basis. |
Not a paper — a working document. Nine checks a buyer can run in about fifteen minutes to tell a compounding plant from a trading company, using only free public sources: the national company registry, the CNCA certificate query, the IATF database and the laboratory's own report verification.
It is published as a printable record sheet, one page per supplier, and it includes E-LUCK's own answers to all nine checks — with the public query behind each claim — so a buyer can run the method on us before talking to anyone else.
Read the checklist online → Download PDF (7 pages) ↓
The white paper is published as a PDF with extractable text, so it can be searched, quoted and cited. Download it here →
If you are setting let-down, judging a supplier's trial sample, or investigating an intermittent defect on a running line, the measurement sections are the ones you will use.
If you have to compare two quotations that look identical on paper, the incoming-inspection section gives you a routine that produces a factual basis for the decision.
If you run thin gauge or pressure pipe, the defects section maps the symptom you are seeing to the cause that usually produces it.
Yes, and there is no registration wall. It downloads directly as a PDF — we would rather you read it than fill in a form.
Yes. Please quote it as “E-LUCK (Guangdong Yijuyuan Plastic Industry Technology Co., Ltd.), Black Masterbatch Dispersion — Filtration Pressure Testing” and link to masterbatchsource.com. We are happy to be corrected on any point — tell us what you measure differently on your own line.
Barely. It is written as a technical reference on dispersion measurement and defect diagnosis, not as a product brochure. Where a grade is mentioned it is because the mechanism needs a concrete example.
Yes — the white paper series is planned to grow. If there is a topic you would want covered, say so and it goes into the queue; the incoming-inspection routine came from exactly that kind of request.