Rubber Compound Selection
EPDM, SBR, TPE, TPE-SEBS, PVC and PP — and the test data that tells you which one the part actually needs.
The compounds we run
EPDM and SBR on the rubber side; TPE and TPE-SEBS where the part has to be recyclable or soft-touch; PVC, and PP with or without glass reinforcement, on the plastics side.
Choosing between them
Ozone and weather point to EPDM. Oil or fuel contact rules EPDM out. Cost-driven interior parts that never see either are usually SBR. A grip or a soft-touch surface is a job for TPE-SEBS. Tell us the service conditions and we will propose the grade.
How the choice is proven
Shore A hardness, density, ozone, ageing, tensile strength, elongation to fracture, vulcanization and insulation resistivity, oil resistance and Mooney viscosity — all run in the Beijing facility, next to the production line, with CTI in Shanghai for work that needs a certified laboratory.
Other capabilities
Overmoulded Finisher Plates
Rubber moulded directly onto a steel or aluminium face, so the insert cannot be levered out.
Press Fit Finishers
A separately moulded rubber insert pressed into the finisher plate — the lower-tooling route to the same look.
Metal Face Finishing
Brushed aluminium, sand blasted or polished stainless steel, plus laser etching, laser cutting and CNC machining.
Prototype to PPAP
Parts from a prototype tool in 4 weeks; full PPAP to ISO/TS 16949 or VDA typically in 8 weeks.
In-House Tooling
Every tool behind these parts was designed and built in our own shop.
Questions buyers ask
Is this quoted separately or inside the part price?
Inside the part price, unless it is a one-off engineering activity such as tooling. Tooling is always quoted as its own line.
How early do I need to decide this?
Before the production tool is cut. The prototype stage — parts 4 weeks from a prototype tool — exists precisely so these decisions can still be changed.
Who do I talk to about it?
Our designers, not only a salesperson. The team works in SolidWorks, Pro-E and UG and sits in the same buildings as the tool shop in Shanghai and Beijing.
Need rubber compound selection?
Send the drawing or the sample and we will tell you what it takes to make it here — tooling, compound and timing.