Valley Processing - Division, Mitchell Rubber Products
CapabilitiesCustom Elastomer and Rubber Formula DevelopmentRubber Compounding and Rubber Mixing ServicesEquipment and ServicesRubber CalenderingInternal MixersQuality AssuranceBarwell PreformsIndustry ApplicationsAerospace and DefenseAgricultureAutomotiveConstructionElectricalEnergyEngineering, Sanitation
and Public Safety
Hoses and Extruded
MiningRecreationTransportationAdditional Industrial
ISO 9001

Custom Elastomer and Rubber Formula Development


Expert chemical engineers at Valley Processing provide unique formulation and testing of rubber compounds for specialized requirements. If you need to create or develop a product, we can provide professional assistance on material selection, processing methods, and testing. Alternatively, you can also choose from our vast inventory of proven formulations. We work with all natural rubber and synthetic elastomeric compounds to meet the precise physical property or performance characteristic that you require. Existing compound formulas can also be revised to suit your new requirement after a thorough analysis.

We work with you to identify the appropriate rubber polymer, analyze its physical properties, match formulations, and finally test a sample of the material. Based on the analysis of critical parameters, such as physical applications and end-use of the part, recommendations on compounds used in formulation, processing, plus cleaning methods are provided. In addition, the chemical and thermal exposure of the finished part is also assessed.

Our operations are supported by two lab mills, a lab Banbury, and a lab extruder - all dedicated to proprietary formula development. Security and confidentiality of new formulas are rigorously maintained across all stages. We preserve all details of customer transactions with discretion to facilitate quick response to customer audits at all times.

Compounds Used Fluoroelastomer
Natural Rubber
Synthetic Elastomers
Assistance Provided

Match Formulations
Material Properties (LAR, flashpoint, viscosity, stability, etc)
Material/Ingredient Selection


Extensive R&D
Low Development Costs
Quick and Cost-effective Commercialization

Processing Capability

Clean Room
Heat Treatment
Vacuum Processing

Other Services

Inspection and Analytical Testing
Technology and Licensing

Facility 1 Lab Banbury
1 Lab Extruder
Four chemical engineers dedicated for compound development, production auditing, and customer service
Two Lab Mills


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