MTEC Research Enables High-Density Polyethylene Pipe Recycling for Agricultural and Drinking Water Applications

Key summary

Researchers at the National Metal and Materials Technology Center (MTEC), NSTDA, have developed a method to recycle high-density polyethylene (HDPE) production scrap into high-quality compound material. By optimizing mixing ratios, additives, and extrusion temperatures, the team determined that recycled compound can be blended with new plastic pellets at up to 50-70% while maintaining quality standards. This process allows for the manufacturing of pipes ranging from 20 mm to 1,600 mm in diameter, including agricultural pipes and drinking water pipes certified under Thai standard MOK 982-2556. The collaboration between MTEC and Vic Public Company Limited also led to the development of pipe fittings such as elbows, tees, stub ends, and reducers, all of which are eligible for inclusion in Thailand's Innovation List. The initiative supports a circular economy by reducing waste, lowering imports of new plastic pellets, and enhancing the sustainability of the Thai manufacturing sector.