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Manufacturer of rubber Products

Compound Design / Technical data

DKL Medcraft Bryden - Rubber / Products & Services / Compound Design / Technical data

Rubber Colour

Compound Design

DKL has a highly experienced onsite rubber technologist, who is able to help you with compound design and selection to help get the correct compound for your requirements.

In the design process we use all types of rubber from natural to fully synthetic as well as a range of colours in delivering enhanced performance compounds this includes:


A selection Guide to Commercial Elastomers  
Properties Natural Rubber Butyl Nitrile (Buna N) Neoprene Hypalon EPDM Silicone Viton Urethanes  
Tensile Strengtyh (MPa): Economy/Quality 10/21 7/14 7/14 10/21 14/21 7/21 7/10 14 28  
Hardness Range (Durom.A) 30-90 40-70 40-95 40-95 40-90 40-90 40-80 55-95 15-95  
Adhension to Metals E E G/E F/G E  
Adhension to Fabric G G F/G G/E VG/E  
Tear Resistance G/VG F G F F/G P E  
Abrasion Resistance G E G/E P G/E E  
Compression Set G F G F/G F F F/G F  
Dielectric Strength E P G VG/G E G G/E E  
Electrical Insulation G/E G/E P F/G G E F/G F/G  
Acid Resistance                    
Dilute F/G G G VG VG  VG VG E F  
Concentrate F/G G G G VG E F E P  
Solvent Resistance                    
Aliphatic hydrocarbons P P E F/G G P P E G/E  
Aromatic hydrocarbons P P G F/G G P P E F/G  
Oxygenated (Ketones, etc) F/G G P P F G/VG F P P  
Lacquer Solvents P F/G F P P P/F P P/F P  
Resistance to:                    
Swell in lub oil P P VG G G/E P F E G/E  
Oil and Petrol P P E G G P F E G/E  
Animal and Vegetable Oils P/G VG VG G G G G/E E G/E  
Water Absorbtion VG VG G G VG VG/E VG G/F =100°CP  
Oxidation G E G VG/E E E O E  
Ozone P/F E F VG/E O O O E  
Sunlight Aging P VG P VG O O O G  
Heat aging(upper limit cont. service) 85°C 120°C 115°C 95°C 130°C 145°C 200°C 200°C 85°C  
Flame³ P P P G G P F/G E F/P  
Heat   G VG G VG E E O O G  
Cold G F/G G G E O G/E E  
Price Range 1 2 2 2 3 1 8 15 4  
Temp Rate                    
Upper Limit 70°C 90°C 140°C 100°C 100°C 100°C 250°C 250°C 70°C  
Lower Limit -50°C -40°C -50°C -40°C -30°C -40°C -60°C -10°C -40°C  
The above chart is intended to assist purchasing engineers to make comparative evaluations and is offered as a guide. Variations in formulation and specific compounding can dramatically affect optimum performance. We would be pleased to provide recommendations against our customers individual requirements.                
  P = Poor VG = Very Good        
  F = Fair E = Excellent        
  G = Good O = Outstanding        
  Price Range          
  1 = Economic          
  15 = Expensive          
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