Hostaform
Hostaform is Ticona's (now Celanese's) brand of acetal copolymer (POMM-C](/line-card/acetal/pom-c/) — polyoxymethylene copolymer) — the European-heritage counterpart to Celcon, widely used in German, Japanese, and European equipment specifications and available globally as molding resin and converted stock shapes for precision engineering applications.
TL;DR
| Property | Value |
|---|---|
| Parent material | Acetal copolymer |
| Chemical identity | Polyoxymethylene copolymer (POM-C) |
| Manufacturer | Ticona (now Celanese Engineering Resins) |
| Geographic prevalence | European OEM specs; global availability |
| Key grades | Hostaform C9021 (standard), C27021 (lubricated), C9021 GV3/30 (glass-filled) |
| Standards | ISO 9988 (POM molding compounds); DIN EN ISO 9988; ASTM D4181 |
What Is Hostaform?
Hostaform is a trade name for Ticona's (subsequently Celanese's) acetal copolymer resin. Chemically, it is identical in type to Celcon — both are acetal copolymers (POM-C) — but they originate from different production facilities and carry different quality documentation, lot-traceability systems, and approval listings that matter in European supply chains.
The acetal copolymer distinction (vs. Delrin homopolymer) is the same as for Celcon: the copolymer backbone improves hot-water stability, eliminates unzipping degradation in processing, and enables porosity-free large-diameter rod manufacturing.
Common Hostaform grades and their uses:
| Grade | Description |
|---|---|
| Hostaform C9021 | Standard general-purpose copolymer; baseline mechanical properties; most widely stocked |
| Hostaform C27021 | PTFE and silicone oil lubricated; lower friction coefficient; for dry-running bearing applications |
| Hostaform C9021 GV3/30 | 15% and 30% glass-fiber reinforced; higher stiffness and creep resistance |
| Hostaform C9021 K | Carbon-fiber reinforced; antistatic |
| Hostaform S9064 | UV-stabilized for outdoor applications |
| Hostaform EC90 | FDA/EU food-contact compliant grade |
Key Properties (Hostaform C9021, Standard Grade)
Hostaform C9021 test data is well-documented in Celanese's ISO-standard datasheets, which report values per ISO test methods (not ASTM). If your procurement documents reference ISO 527 (tensile) or ISO 178 (flexural) instead of ASTM D638/D790, Hostaform's published data directly answers the spec without conversion. This is a practical advantage in European or ISO-standard supply chains.
Hostaform vs. Celcon: Same Material, Different Documents
| Attribute | Hostaform | Celcon |
|---|---|---|
| Chemical type | POM copolymer (POM-C) | POM copolymer (POM-C) |
| Manufacturer | Celanese (fmr. Ticona) | Celanese |
| Data format | ISO test methods primary | ASTM test methods primary |
| Approvals emphasis | European (DIN, DVGW, NSF) | US (FDA, NSF, UL) |
| Legacy use | European OEM specs | North American OEM specs |
| Interchangeable? | Technically yes for most uses | Technically yes for most uses |
For most engineering applications, Hostaform C9021 and Celcon M90 are functionally interchangeable. The choice is typically driven by the approval documentation required (FDA lot letters vs. EU food contact declaration), the existing supplier qualification, and whether the part drawing calls out a specific brand.
Typical Applications
Hostaform stock shapes appear wherever precision acetal copolymer parts are machined:
- Automotive fuel and fluid systems — Hostaform is approved for diesel and gasoline contact in several OEM specifications; used in fuel pump gears, valve bodies, and quick-disconnect fittings.
- Plumbing and water treatment — DVGW (German water quality authority) listed Hostaform grades are used in water meter gears, valve balls, and fitting components throughout European plumbing systems.
- Food and beverage processing equipment — Hostaform EC90 and select C9021 grades carry EC 10/2011 (EU food contact plastics) documentation, enabling European food machinery compliance.
- Office and consumer electronics — gears, cams, and guide rails in printers, copiers, and scanning equipment.
- Medical devices — ISO 10993-evaluated Hostaform grades are used in surgical instrument handles and analytical equipment housings.
- Industrial machinery — self-lubricating bushings, cam followers, conveyor chain guides, and precision spacers.
Standard Sizes (Stock Shapes)
| Form | Typical size range |
|---|---|
| Sheet | 1/8 to 2 in. thick; 24 × 48 in. standard |
| Rod | 1/4 to 6 in. diameter |
| Tube | 1 to 6 in. OD; custom wall |
| Colors | Natural (white/off-white); black available |
In North America, "acetal copolymer" stock shapes from most distributors are based on Celcon or Hostaform resin interchangeably. If a specific brand name is required (e.g., drawing calls out "Hostaform C9021"), confirm with your distributor that the resin certification is available.
Standards Reference
- ISO 9988-1 / ISO 9988-2 — International standards for POM molding compounds; Hostaform C9021 is classified per ISO 9988 Type I (copolymer) Grade 1.
- ASTM D4181 — US equivalent for acetal molding compounds; Type I copolymer.
- ASTM D6778 — Standard specification for acetal rod, tube, and sheet shapes.
- EU Regulation 10/2011 — EU food contact plastics regulation; EC90 grade is listed.
- DVGW W270 / W534 — German water quality approvals for drinking water contact applications.
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