Preview: Basic Rubber Compounding Course at Tire Technology Expo
The Basic Rubber Compounding Course will take place parallel to the Tire Technology Expo from 19 - 20 February 2018 in Hanover, Germany. It is designed for all those working in the associated tyre industries, who wish to know more about the compounding of rubber.
The course will be presented by Bob Kind MIMMM, GPRI, technical director of Polymer Recyclers UK; and John Bowen MIMMM, BSc, consultant formerly of Robinson Bros Chemicals UK. It will define the concepts in simple terms, but at the same time relate them to actual manufacturing and product circumstances.
Monday, 19 February 2018
- Chemical formula, molecular model
- Manufacture – latex, tapping, concentration, coagulation
- Chemical and physical properties - crystalinity, elasticity, hysteresis, glass transition, mastication
- Basic chemistry of vulcanisation
- Crosslinking agents
- Test methods optimum cure, cure rate, scorch, Tan Delta
- Effect of different cure systems on properties
- Relationship between temperature and time
- Heat transfer and curing methods and media
- Viscosity - Measurement, effect of strain rate, processability testers, Surface finish, shrinkage and nerve, tack.
- To change the basic properties and to make a range of products by the inclusion of different chemicals, a typical compound and the role of basic ingredients.
- The requirement for reinforcement
- Reinforcing fillers - carbon black and silica
- The effect of particle size and structure
- From degradation. Effect of Oxygen, Ozone, heat UV light
- Effect of Liquids - oil and fuel resistance, water, acid & alkali resistance
- Video of lab mill mix. Addition order, time and temperature.
- Advantages and disadvantages.
- Compatability & polarity, dispersion, distribution, solubility, bloom.
Tuesday, 20 February 2018
- Types of mixer, methods of mixing, control parameters, fill factor, automatic control of weighments and process, quality control.
- For vulcanised rubber. Basic tests – Hardness, SG, Tensile strength, Tear strength. Product specific tests – Abrasion resistance, flex cracking, ozone resistance, accelerated ageing tests, compression set, fluid resistance.
- Specifically tyre elastomers SBR, BR, IIR and halogenated IIR, methods of manufacture, property comparisons.
Specifications for vulcanised rubber
- The ASTM D 2000 classification system for automotive applications.
- Specific requirements, silica and silane technology
Moulding, extrusion & calendaring
- Steam vulcanisation, continuous vulcanisation
- Materials already in use.
- Recycled materials, tyre crumb, reclaim, devulcanised rubber, pyrolytic black and recycled process oil.