What are the current methods for recycling low-density TPR?

Recycling low-density thermoplastic rubber (TPR) can be challenging, but several methods are being developed and utilized. Here are some current approaches:

Mechanical Recycling:
This is the most common method for recycling low-density TPR. It involves grinding the material into small particles or pellets that can be remolded or extruded into new products. The process typically requires careful sorting and cleaning to remove contaminants.

Chemical Recycling:
In this method, low-density TPR is chemically broken down into its monomers or other valuable chemicals through processes such as pyrolysis or depolymerization. This can allow for the recovery of raw materials that can be used to produce new TPR or other products.

Thermal Recycling:
Thermal recycling involves using heat to melt down low-density TPR and reform it into new products. This can be done through processes like extrusion or injection molding, although it may require additives to improve the properties of the recycled material.

Energy Recovery:
When recycling is not feasible, low-density TPR can be incinerated to recover energy. This method converts waste into energy but raises environmental concerns regarding emissions and ash residue.

Upcycling:
Some companies focus on upcycling low-density TPR by transforming it into new products with higher value, such as footwear, automotive components, or industrial materials. This approach often involves creative design and innovative manufacturing techniques.

Material Recovery Facilities:
Dedicated facilities may be established to sort and process low-density TPR waste, separating it from other materials for more efficient recycling.

Biodegradable Additives:
While not recycling in the traditional sense, some manufacturers are exploring the incorporation of biodegradable additives in low-density TPR to facilitate breakdown in landfills or composting environments.

Collaboration and Industry Initiatives:
Various industry initiatives and collaborations are being developed to improve the recycling rates of low-density TPR, focusing on better design for recyclability and creating a circular economy.