Injection Molding
Tooling and molding for your repeat plastic parts.
YOUR NITRILE COMPOUND. YOUR FLUID. YOUR FINISHED FIT.
NBR Material for Your Custom Parts
Plan custom NBR parts, nitrile rubber molding and custom nitrile gaskets around the full compound, cure state, fluid and final interfaces. Agree raw-polymer traceability when required, tooling, sample approval and inspection so your quote covers the finished component you need.
NBR is a material and compound review. Rubber molding, sheet cutting and bonding availability require drawing review; ordinary thermoplastic process settings are not implied.
Full CompoundKeep formulation, cure and batch.
Compound & CureSpecify the delivered condition.
Exposure & FitDefine media, movement and interfaces.
Your ApprovalAgree dimensions and function.
4 Starting Points for Your NBR Review
Molded Sealing Inserts
For NBR injection molding or another agreed rubber molding route, review lips, parting lines, tooling and controlled compound. Do not transfer ordinary thermoplastic resin processing assumptions.
Custom Sheet Gaskets
For custom nitrile gaskets, identify cured sheet producer, compound, thickness and cut-edge condition. The raw-polymer grade alone does not specify the sheet.
Flexible Boots & Diaphragms
Review fluid contact, movement, clamping and dimensional state. Agree the full formulation, cure and representative application tests.
Rubber-to-Metal Components
Review rubber and metal together, including surface preparation, interface, cure and agreed bond test. Confirm manufacturing scope for your drawing.
Review Your Raw Polymer and Finished Compound
Review PERBUNAN 3445 F for Your Drawing
For a PERBUNAN 3445 F custom parts quote, retain this full raw-polymer product and the separate controlled compound. Supplier raw viscosity and acrylonitrile content do not specify the finished seal.
| Your decision | What to confirm |
|---|---|
| Material identity | Full raw product plus controlled compound and batch |
| Delivered condition | Cure system and supplied condition |
| Acceptance | Tooling, sample, dimensions and function |
Confirm the Supply Form
Raw polymer, controlled compound and cured stock require distinct purchasing evidence.
| Your decision | What to confirm |
|---|---|
| Raw Polymer Into a Controlled Compound | Specify the NBR rubber material, full raw-polymer product when required, compounding source and finished compound identifier. Buna N rubber is a family-level purchasing description, not a complete formulation or part approval. |
| Cured Stock or Finished Components | For sheet and molded or bonded components, retain full compound, cure state, lot, dimensions and approved sample. Keep raw-polymer data separate from stock and finished-part records. |
Agree Your Finished Fit
Review the actual assembly and measuring state.
| Your decision | What to confirm |
|---|---|
| Seal interfaces | Groove, squeeze, motion and mating surface |
| Exposure | Media, temperature, time and load |
| Measurement | Support, critical dimensions and agreed method |
Retain Product and Part Records
Material documents and finished-part approval serve different purposes.
| Your decision | What to confirm |
|---|---|
| Identity | Manufacturer product, color, batch and supplied condition |
| Drawing | Critical dimensions, sealing edges and appearance |
| Function | Approved sample and specified tests |
Review KRYNAC 3345 F for Your Drawing
For a KRYNAC 3345 F custom parts quote, retain the exact suffix, regional product and compounding chain. Do not treat another KRYNAC or PERBUNAN grade as an automatic replacement.
| Your decision | What to confirm |
|---|---|
| Material identity | Full raw product plus controlled compound and batch |
| Delivered condition | Cure system and supplied condition |
| Acceptance | Tooling, sample, dimensions and function |
Confirm the Supply Form
Raw polymer, controlled compound and cured stock require distinct purchasing evidence.
| Your decision | What to confirm |
|---|---|
| Raw Polymer Into a Controlled Compound | Specify the NBR rubber material, full raw-polymer product when required, compounding source and finished compound identifier. Buna N rubber is a family-level purchasing description, not a complete formulation or part approval. |
| Cured Stock or Finished Components | For sheet and molded or bonded components, retain full compound, cure state, lot, dimensions and approved sample. Keep raw-polymer data separate from stock and finished-part records. |
Agree Your Finished Fit
Review the actual assembly and measuring state.
| Your decision | What to confirm |
|---|---|
| Seal interfaces | Groove, squeeze, motion and mating surface |
| Exposure | Media, temperature, time and load |
| Measurement | Support, critical dimensions and agreed method |
Retain Product and Part Records
Material documents and finished-part approval serve different purposes.
| Your decision | What to confirm |
|---|---|
| Identity | Manufacturer product, color, batch and supplied condition |
| Drawing | Critical dimensions, sealing edges and appearance |
| Function | Approved sample and specified tests |
Review NIPOL DN3335 for Your Drawing
NIPOL DN3335 identifies a manufacturer NBR raw polymer. Retain its full product and the separately approved compound, cure and finished-part evidence; DN3350 is a different designation.
| Your decision | What to confirm |
|---|---|
| Material identity | Full raw product plus controlled compound and batch |
| Delivered condition | Cure system and supplied condition |
| Acceptance | Tooling, sample, dimensions and function |
Confirm the Supply Form
Raw polymer, controlled compound and cured stock require distinct purchasing evidence.
| Your decision | What to confirm |
|---|---|
| Raw Polymer Into a Controlled Compound | Specify the NBR rubber material, full raw-polymer product when required, compounding source and finished compound identifier. Buna N rubber is a family-level purchasing description, not a complete formulation or part approval. |
| Cured Stock or Finished Components | For sheet and molded or bonded components, retain full compound, cure state, lot, dimensions and approved sample. Keep raw-polymer data separate from stock and finished-part records. |
Agree Your Finished Fit
Review the actual assembly and measuring state.
| Your decision | What to confirm |
|---|---|
| Seal interfaces | Groove, squeeze, motion and mating surface |
| Exposure | Media, temperature, time and load |
| Measurement | Support, critical dimensions and agreed method |
Retain Product and Part Records
Material documents and finished-part approval serve different purposes.
| Your decision | What to confirm |
|---|---|
| Identity | Manufacturer product, color, batch and supplied condition |
| Drawing | Critical dimensions, sealing edges and appearance |
| Function | Approved sample and specified tests |
Review KUMHO KNB 35L for Your Drawing
For a KUMHO KNB 35L custom parts quote, retain the full raw-polymer name, producer and compound traceability. Product-sheet raw values and example properties do not certify your finished gasket or seal.
| Your decision | What to confirm |
|---|---|
| Material identity | Full raw product plus controlled compound and batch |
| Delivered condition | Cure system and supplied condition |
| Acceptance | Tooling, sample, dimensions and function |
Confirm the Supply Form
Raw polymer, controlled compound and cured stock require distinct purchasing evidence.
| Your decision | What to confirm |
|---|---|
| Raw Polymer Into a Controlled Compound | Specify the NBR rubber material, full raw-polymer product when required, compounding source and finished compound identifier. Buna N rubber is a family-level purchasing description, not a complete formulation or part approval. |
| Cured Stock or Finished Components | For sheet and molded or bonded components, retain full compound, cure state, lot, dimensions and approved sample. Keep raw-polymer data separate from stock and finished-part records. |
Agree Your Finished Fit
Review the actual assembly and measuring state.
| Your decision | What to confirm |
|---|---|
| Seal interfaces | Groove, squeeze, motion and mating surface |
| Exposure | Media, temperature, time and load |
| Measurement | Support, critical dimensions and agreed method |
Retain Product and Part Records
Material documents and finished-part approval serve different purposes.
| Your decision | What to confirm |
|---|---|
| Identity | Manufacturer product, color, batch and supplied condition |
| Drawing | Critical dimensions, sealing edges and appearance |
| Function | Approved sample and specified tests |
Separate Raw-Polymer ACN Content From Seal Approval
ARLANXEO raw-polymer finder · Acrylonitrile content, wt% · ISO 24698 · supplier nominal raw-polymer values
Raw-Polymer ACN Content (wt%)
Nominal raw-polymer values from one ARLANXEO product finder, not a hardness, oil-resistance or finished seal ranking. Confirm full compound, cure and application evidence separately.
Supplier product finder →2 Purchasing Forms. Different Evidence.
Raw Polymer Into a Controlled Compound
Specify the NBR rubber material, full raw-polymer product when required, compounding source and finished compound identifier. Buna N rubber is a family-level purchasing description, not a complete formulation or part approval.
Cured Stock or Finished Components
For sheet and molded or bonded components, retain full compound, cure state, lot, dimensions and approved sample. Keep raw-polymer data separate from stock and finished-part records.
Resolve 6 NBR Material Risks
ACN & compound identity for Your Finished Part
Does NBR acrylonitrile content determine finished seal performance? No. Retain the raw-polymer grade, complete formulation, cure and specified tests. NBR acrylonitrile content is one input, not a finished seal acceptance rule.
Actual fluid & exposure for Your Finished Part
What fluid information is needed to select an NBR gasket? Identify the full fluid and additives, concentration, temperature, duration, pressure and movement. Agree representative compatibility evidence for the exact compound rather than relying on an oil-resistant label.
Cure & supplied condition for Your Finished Part
For NBR compression molding or another qualified rubber process, retain the controlled compound, current cure instructions, finishing scope and delivered condition. Agree inspection of critical sealing edges and interfaces.
Compression & hardness for Your Finished Part
NBR Shore hardness and NBR compression set answer different questions. Specify scale, method, specimen, cure and conditioning for hardness; retain deflection, temperature, duration and recovery for compression set.
NBR & HNBR alternatives for Your Finished Part
For NBR vs HNBR, compare exact products, compounds, cure, fluid exposure and final interfaces. Can HNBR replace NBR without seal validation? Do not approve the change without documented material and representative finished-part evidence.
Final fit & records for Your Finished Part
For NBR material certification, agree producer, full compound, cure state, lot and raw-polymer traceability when required. Keep dimensional inspection, appearance sample and functional approval separate.
Match the Route to Your NBR Compound
Rubber Molding Review
For NBR compression molding or another qualified rubber route, agree compound, tooling, cure, sealing edges and approved sample.
Review requirements ↓
Nitrile Sheet Gaskets
Agree cured sheet identity, thickness, cut edge, hole geometry and dimensional acceptance.
Review requirements ↓
Rubber-to-Metal Review
Agree rubber, metal, surface preparation, interface, cure and representative bond acceptance.
Review requirements ↓Manufacturing availability requires drawing review. Rubber processing is separate from ordinary thermoplastic molding settings.
Agree 3 Checks for Your Receiving Team
| Your check | Evidence to agree |
|---|---|
| 1 | Producer, full compound, cure state, lot and required raw-polymer traceability. |
| 2 | Controlled drawing, sealing lips and edges, critical fit and agreed measurement state. |
| 3 | Approved sample, agreed NBR material certification and specified fluid, compression or bond tests. |
6 Inputs for Your NBR Quote
- 01CAD + controlled drawing
- 02Full compound + cure + supplied form
- 03Quantities + tooling + manufacturing route
- 04Media + temperature + movement
- 05Critical fit + sealing edge + appearance
- 06Material records + functional tests + delivery
Material · Tooling · Cure and finishing · Quantity · Inspection · Delivery
Answers Before You Specify
What should a custom nitrile rubber molding quote include?
Send CAD and drawing, full NBR compound and cure state, quantities, molding scope, fluid details, temperature, movement, sealing surfaces and required records. An NBR molding quote must cover the same final material and inspection scope.
Does NBR acrylonitrile content determine finished seal performance?
No. The raw polymer is part of the formulation. Full compound, cure, geometry, environment and the specified finished-part tests remain necessary.
Can HNBR replace NBR without seal validation?
Do not approve a substitute from the abbreviation. Compare exact compound, cure, dimensions, fluid exposure and functional tests; retain drawing and material change approval.
Is Buna N a complete compound specification?
No. Specify producer, full formulation or controlled compound identifier, cure, required properties, lot and supplied condition.
What fluid information is needed to select an NBR gasket?
Identify the exact fluid and additives, concentration, temperature, contact time, pressure, motion and cleaning exposure. Agree compatibility review and representative testing for the chosen compound.
Can equal Shore hardness NBR compounds be interchanged?
Not automatically. Review complete formulation, cure, fluid response, compression behavior, bonding where applicable and required records, then approve a representative sample.
Retain Your Full Compound and Supplied Condition
| Reference | What it does and does not identify |
|---|---|
| NBR / nitrile rubber | Acrylonitrile-butadiene rubber direction; retain full polymer and controlled compound. |
| Buna N | Common family-level description; not a full compound specification. |
| HNBR alternative | A distinct material direction requiring exact-product and finished-part change approval. |
| Full grade + controlled compound | PERBUNAN, KRYNAC, NIPOL and KUMHO KNB trade names need full suffix, compounding chain, cure and final approval. |
Generic polymer designations do not approve a manufacturer-grade substitution. Retain the complete product, suffix and application evidence rather than inventing an EN/DIN equivalent.
Product references: ARLANXEO, ZEON and KUMHO raw-polymer information. Generated concepts illustrate geometry, not actual customer parts or material-grade identification.
