Compounded by Japan. Built in China. Tested in-House.
RubberQ develops and controls custom compound work from polymer selection to validated batch release. Japanese formulation support, Fuzhou precision manufacturing, and in-house testing work as one engineering chain.
Why Compounding Matters
For many rubber parts, the hidden risk is not the mold. It is whether the compound can be reproduced across years of supply.
- ✗ Purchased compounds can limit formulation visibility
- ✗ Shared mixing routes can increase variation risk
- ✗ Molding without batch validation makes repeat supply harder
- ✗ A future reorder may not match the original material behavior
RubberQ manages compound work as part of the manufacturing system:
- ✓ Formulation support developed through Japanese partnership since 1995
- ✓ Single A-mixing line with controlled scheduling and cleaning routines
- ✓ Batch release tests for cure, hardness, tensile, viscosity, and aging behavior
- ✓ Traceable production records for repeat orders and customer qualification files
Our Single A-Mixing Line
- ▸ Batch range: 500g – 5,000kg per compound batch
- ▸ Mixer: Banbury internal mixing process with controlled recipe and weighing records
- ▸ Production planning: matched to project volume, formulation family, and release-test needs
Three operational advantages we preserve by running a controlled single-line process:
1. COMPOUND CONSISTENCY
Same process route, same control window, and repeatable batch records make long-term supply more stable.
2. CONTAMINATION-RISK CONTROL
Sequence planning and cleaning routines help protect high-purity and long-life sealing programs.
3. ENGINEERING REVIEW AT RELEASE
Rheology, Mooney viscosity, and key batch indicators are reviewed before the compound moves to molding.
Batch release logic
A-Mixing, B-Mixing, and Batch Release Control
The process flow separates masterbatch preparation from final cure-system addition. This reduces formulation drift, improves traceability, and gives the lab a defined release gate before molding.
Release tests typically linked to this flow
Masterbatch foundation
Base polymer, filler, oil, and reinforcement materials are weighed, barcode-checked, mixed, sheeted, cooled, and screened for foreign matter before release.
Intermediate material check
A-compound can be checked for dispersion, specific gravity, and Mooney viscosity before it moves to final mixing.
Cure-system addition
Accelerators and cure-system ingredients are added later under process instruction, then the compound is matured, cut, stored, and prepared for molding.
Lab gate before molding
Rheometer curve, hardness, tensile strength, elongation, and drawing-specific checks confirm the batch is suitable for production.
Inside Our R&D Laboratory
Rheometer / Mooney Viscometer
Cure characteristics and viscosity
Universal Tensile Tester
Strength and elongation
Aging Oven
Thermal and 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 share operating conditions such as temperature, medium, movement, target life, drawing, and annual volume.
FORMULATION DESIGN
→ 3-6 weeksWe select or adjust candidate compounds based on polymer family, service chemistry, and production route.
LAB TRIAL
→ 2-4 weeksSmall batches are mixed and tested so the material window is understood before molded samples.
PILOT MOLDING
→ 2-3 weeksPilot tooling or trial molding produces samples for dimensional and functional review.
PRODUCTION RELEASE
→ 4-8 weeksFirst-article inspection, batch traceability, and production controls are aligned for repeat supply.
Typical timing: 12-24 weeks for a new compound path, or 4-8 weeks when adapting an existing RubberQ compound.
Our Compound Library
RubberQ maintains a growing compound library across major polymer families. Specific recipes remain proprietary, but the capability range is shown below.
| Family | Typical Applications | Temp Range | Key Property |
|---|---|---|---|
| FKM | Industrial / Automotive / Chemical | -20 to +200°C | Chemical resistance |
| FFKM | Semiconductor / Plasma / High-purity | -20 to +260°C | Extreme chemical and thermal purity |
| HNBR | EV thermal systems / High-temp equipment | -40 to +160°C | Low compression set, oil and heat |
| NBR | Hydraulic / Oil sealing / General industrial | -40 to +120°C | Cost-effective oil resistance |
| EPDM | Outdoor enclosures / Steam / Energy 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 and 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? Share the application conditions and we will review the material path.
Start a custom compound brief →Development Paths and Timing
We align scope and timing early so purchasing and engineering teams can plan with confidence:
EXISTING COMPOUND ADJUSTMENT (4-8 weeks)
Adjust hardness, cost target, or a single property from an existing RubberQ compound.
COMPOUND SELECTION AND VALIDATION (8-16 weeks)
Select and validate from our compound library for a specific application and drawing.
NEW COMPOUND PATH (12-24 weeks)
Develop a new compound route with agreed test plan, samples, and release criteria.
For new compound work, we pair formulation with a validation plan so sampling, testing, and production release stay aligned.
Ready to Co-Develop?
Whether you have a drawing ready for quote or an application condition that needs material guidance, start with the operating details.