The following sections outline the different process steps of rubber- and plasticsproduction and describe their associated gas applications.
Cleaning with CO2-Snow
Plastic parts have to be cleaned before painting due to the fact that during the manufacturing or storage contaminations are on the surface which have to be removed. Snow cleaning is an effective method to clean the parts.
Cryogenic grinding of thermoplastics and elastomers
With the right grinding technique this also allows for finer products of a better quality and a significantly higher throughput than with classical grinding processes; even with tough and elastic products such as thermoplastics and elastomers. Materials with a low softening point (hot melt adhesive, bitumen) can be equally well ground.
Different materials have different coefficients of linear thermal expansion and embrittlement capabilities; cold grinding technology utilises this to separate composite materials (fibre reinforced thermoplastics, galvanised plastic parts, old tyres etc.) into their component parts or from their accompanying substances.
In the tire production process, it is important to meet the high demands on the tire while simultaneously optimizing the complex process. A very important production step is vulcanization. Conventional methods, e.g. the steam system, have some disadvantages. Process parameters, such as pressure and temperature, cannot be set independently of one another in this process, which has a negative impact on the quality of the tire. The additional use of nitrogen provides a reliable solution here.