Compounded by Japan. Built in China. Tested in-House.
While 95% of rubber suppliers buy compounds off the shelf, RubberQ engineers them. From polymer chemistry to validated batch release — we own the entire value chain.
Why Compounding Matters
When you buy a rubber part from a typical Asian supplier, the compound was likely:
- ✗ Bought in bulk from a Chinese compound trader
- ✗ Mixed in a shared multi-product line with cross-contamination risk
- ✗ Untested by the molder before molding
- ✗ Impossible to reproduce 5 years later when you need replacement parts
When you work with us, every compound is:
- ✓ Designed by our Japanese formulation partners since 1995
- ✓ Mixed on our dedicated single A-line (zero cross-contamination)
- ✓ Tested in-house for every batch (aging, tensile, viscosity, cure)
- ✓ Permanently traceable — your 2030 PPAP file will still match your 2026 part
Our Single A-Mixing Line
- ▸ Capacity: 500g – 5,000kg per compound batch
- ▸ Mixer: [TBD] kg Banbury internal mixer
- ▸ Throughput: [TBD] tons / month
Three operational advantages we deliberately preserve by running ONE line, not many:
1. COMPOUND CONSISTENCY
Same Banbury, same process curve, same operator team. Your 2030 PPAP file will reproduce your 2026 part exactly. Multi-line plants can't guarantee this.
2. CROSS-CONTAMINATION CONTROL
Strict cleaning SOP between batches. Sequence-ordered scheduling: highest-purity compounds first, high-carbon-black/peroxide compounds last. Critical for semiconductor FFKM and EV battery seal applications.
3. ENGINEER-WITNESSED PRODUCTION
Every batch's rheology curve and Mooney viscosity is reviewed in real time by our lab team — not sampled. Multi-line plants only sample-check.
Inside Our R&D Laboratory
Rheometer / Mooney Viscometer
Cure characteristics & viscosity
Universal Tensile Tester
Strength & elongation
Aging Oven
Long-term thermal & ozone aging
Compression Set Tester
Sealing durability
Oil Immersion Bath
Fluid resistance
Durometer
Shore A / Shore D hardness
From Application to Production
NEED ASSESSMENT
→ Within 5 business daysYou describe operating conditions (temp, fluid, lifecycle). Mutual NDA in place.
FORMULATION DESIGN
→ 3-6 weeksJapanese formulation partners propose 2-3 candidate compounds based on application chemistry.
LAB TRIAL
→ 2-4 weeksWe mix small batches (500g) and run full property tests. You receive the test report; we iterate as needed.
PILOT MOLDING
→ 2-3 weeksPilot tooling + small-batch molded samples for your functional validation in your end environment.
PRODUCTION RELEASE
→ 4-8 weeksTooling scaled to production. First-article inspection, PPAP/FAI documentation, batch traceability live.
Total: 12-24 weeks for ground-up compound development. 4-8 weeks if optimizing an existing RubberQ compound.
Our Compound Library
[TBD: 200+] proprietary compounds developed over 30 years. Categorized by polymer family and application chemistry. Specific formulations remain proprietary; high-level capability shown below:
| Family | Typical Applications | Temp Range | Key Property |
|---|---|---|---|
| FKM | Auto / Industrial / Chemical | -20 to +200°C | Chemical resistance |
| FFKM | Semiconductor / Plasma / High-purity | -20 to +260°C | Extreme chemical & thermal purity |
| HNBR | EV thermal management / High-temp auto | -40 to +160°C | Low compression set, oil + heat |
| NBR | Hydraulic / Oil sealing / General industrial | -40 to +120°C | Cost-effective oil resistance |
| EPDM | Battery seals / Outdoor / Steam systems | -50 to +150°C | Weather, ozone, steam resistance |
| ACM | Automotive transmission / ATF | -25 to +175°C | ATF resistance |
| AEM | Automotive heat ducts / Hoses | -40 to +175°C | Heat + oil resistance |
| HCR Silicone | Industrial seals / Wide temperature | -60 to +230°C | Extreme temperature range |
| LSR | Precision overmolding / Liquid injection | -60 to +200°C | Tight-tolerance overmolding |
Need a property combination not listed? That's exactly what we develop.
Start a custom compound brief →What We Can — and Cannot — Promise
We're transparent about development scope so you can plan accordingly:
FAST (4-8 weeks)
Optimize an existing RubberQ compound (e.g., adjust hardness, cost, single property).
STANDARD (8-16 weeks)
Select + validate from our compound library for your specific application.
NDA-DEPENDENT (12-24 weeks)
Ground-up new compound from first-principles polymer chemistry. Timeline depends on Japanese team availability — disclosed in NDA.
We will not promise "new compound from scratch in 4 weeks." Anyone who does is either lying or cutting corners that will fail PPAP.
Ready to Co-Develop?
Whether you have a drawing waiting for a quote, or a material problem looking for a solution — start the conversation.