Celuka, Forex, Foamex, Sintra? Quid Nomina Tabularum Spumosarum PVC Reapse Significant

Ask five suppliers for “PVC foam board” and you may receive five quotations for five different materials — all carrying a name that sounds like a brand, none of them describing what you are actually buying.

This is one of the most expensive communication problems in the trade. A buyer specifies “Celuka” and receives a free-foam board. Another orders “Forex” in one country and gets a completely different density than the “Forex” their colleague sourced elsewhere. The name is not the specification.

This article maps the names you will encounter to the three manufacturing processes and the density ranges they actually represent — so you can order by specification instead of by name.

Why One Material Has Twenty Names

PVC foam board is a generic material family, not a branded product. The names in circulation come from three different sources:

Nomen processuum — vocabula quae describunt quomodo tabula fabricatur, quae deinde ad tabulam ipsam breviter designandam usurpata sunt.

Nomina fabri-cantium — signa propria quae ad certos productores pertinent, quae in quibusdam mercatibus ad nomen generale categoriae evaserunt.

Nomina regionalia et distributorum — nomina quae in uno tantum mercatu orta sunt et in alio nihil significant.

Tres Processus Sub Omine Quoquo

Quocumque nomine tabula appellatur, uno ex tribus processibus facta est. Haec est classificatio quae re vera valet.

Figura 1. Tres structurae tabularum spumae PVC comparatae per sectionem physicam transversalem.

1. Spuma Libera (vulgo spuma cellulis apertis seu spuma communis)

A uniform, lower-density foam with no dense skin. Density typically 0.3–0.35 g/cm³, thickness 1–20 mm. Light, economical, and intended for flat applications: advertising boards, screen printing, CNC engraving and short-term displays.

2. Celuka / Integral Skin Foam

A controlled foaming process in which a cooled calibrating die forms a dense outer skin around a lighter core. Density typically 0.4–1.0 g/cm³, thickness 1–30 mm. The hard skin is what allows grooving, screw fixing and use as a structural component.

Figure 2. PVC foam board passing through an industrial calibration line.

Celuka is a process name that became a product name. An important clarification: Celuka is an integral-skin PVC foam board — it is not automatically the same thing as a separately co-extruded multilayer sheet.

3. Co-extrusion

Duo extrusores alimentant unum matricem, ita ut stratum superficiale et nucleus singulas compositiones habeant. Hoc est quod co-extrusionem a Celuka normali distinguit: stratum superficiale optimizari potest pro duretia, resistentia ad scabras, resistentia ad chemicas et ad tempora, independente a nucleo. Densitas typice 0.5–0.85 g/cm³, crassitudo 3–30 mm, in tribus coloribus nuclearibus (albus / niger / flavidus) et novem coloribus superficialibus disponibilis.

Nomina communia quae invenies

Nomina brandorum tertiorum supra sunt usitata ad identificationem tantum. Non sumus affines, nec fabricamus, ista branda.

Quod Processus Reapse Mutat

Densitas Nomen Revelat

Si unum ex hoc articulo meminisse debes, hoc tabula sit. Densitas est numerus qui comportamentum determinat.

Densitas superior non est automaton melior. Fortitudinem et tenacitatem vis chirothecarum augent, sed etiam pondus maius, pretium altius et rapidius instrumentorum abraditur. Densitas ad opus aptanda est.

How to Order Without Using Brand Names

Replace the name in your enquiry with a five-line specification:

Process — free foam, Celuka (integral skin) or co-extrusion

Density — with a tolerance (e.g. 0.55 g/cm³ ± 0.02)

Thickness — with a tolerance

Sheet size — and whether custom sizes are acceptable

Application — what the board will actually be used for

Five Questions to Ask When a Supplier Quotes a Brand Name

Which of the three processes is this — free foam, integral skin or co-extrusion?

Quid est densitas nominalis, et quid est tolerantia?

Quid est tolerantia crassitudinis, et an in PI aut in contractu scripta est?

Num lamina alba est per totum corpus, an tantum superficies alba super corpus coloris diversi?

Potestisne mittre TDS et exemplar physicum antequam ad ordinem me obligem?

Fornitor qui omnes quinque quaestiones respondet vobis specificatio vendit. Qui autem tantum nomen brandi repetit, vobis verbum vendit.

Quaestiones Frequenter Rogatae

Num Forex idem est ac Celuka?

Non necessario. «Forex» est nomen commerciale, dum «Celuka» processum describit — tabulam cutis-integralis cum cute externa densa. Tabula ut «Forex» vendita fortasse non est cutis-integralis, et fortasse ad unam ex pluribus densitatibus producitur. Semper confirmate processum et densitatem.

Num Sintra idem est ac tabula Celuka?

Sintra est marca registrata tabulae PVC modice expansae, dum Celuka est nomen processus pro tabula spumosa cutis-integralis. Ad eandem familiam latam materiae pertinent, sed non sunt termini intermutabiles.

Quid est differentia inter Celuka et co-extrusionem?

Celuka format suam cuticulam per processum spumationis et calibraturae. Co-extrusio utitur duobus extrusoribus et uno dysco, ita ut stratum superficiale et nucleus habeant formulationes separatas — quod permittit stratum superficiale optimari pro duritia et resistentialitate ad tempus independenter. Tabula co-extrusa melior optio est pro applicationibus exterioribus et ad contactum frequens.

Quomodo scio an mihi recta tabula sit missa?

Primum densitatem inspice — pondus partis praecise sectae et calcula. Deinde spissitudinem cum calipri examine et sectionem transversam inspice: tabula integral-skin ostendit visibiliter densiorem stratum exterius, dum tabula free-foam uniformis est per totum.

Figura 3. Controlus qualitatis in fabrica per caliprum, scalae et sectas tabulas specimen.

Potestne Pluswin tabulam ad meas proprias specificaciones facere, non ad nomen standardem?

Yes. Density is adjustable from 0.3 to 1.0 g/cm³, colour can be matched to any Pantone reference, and size, thickness, facing material (7 options) and packaging can all be customised. Send us the five-line specification above and we will quote against it.

Send us your specification

Hangzhou Jiaying Trade Co., Ltd. (Pluswin) — manufacturer of Celuka, free foam, co-extrusion, WPC, laminated, marble UV and wall panel products. Established 2006 in Hangzhou, Zhejiang, China.