top of page

Why weld plastic with nitrogen?

Porque Soldar com Nitrogenio Print-01.png

When you repair and weld a plastic part with nitrogen, you give back the original original strength and elasticity to the plastic. No other conventional method of plastics repair meets this requirement of resistance and quality. 

Why is different with nitrogen?


Using nitrogen during the welding process replaces the oxygen in the air with high temperature nitrogen, creating the ideal atmosphere for plastic welding. Nitrogen does not react with thermoplastic polymers. 

When you weld the plastic in the presence of oxygen a process that reduces the strength significantly occurs, its called  carbonization of plastic, the welding process becomes impure, it ends up causing oxidation, addition of carbon in the middle of the weld , thermal stress and decomposition of materials, which considerably weakens the repair. 

Traditional plastic welding processes like hot air plastic welding or hot iron welding processes will give an external image of a good weld, but when they are subjected to tests of resistance, will fail.

The recovery of plastics, for example, in the agroindustry requires the highest possible resistance, something that only this nitrogen welding technique can achieve.

Nitrogen plastic welding does not incorporate external chemicals in the repair process. This guarantees for example that posterior painting processes of the parts will not react with added chemicals.

The Future of Car Industry

Repairing and welding plastic is no longer trivial in the automotive industry, the desperate search for weight reduction in manufactured vehicles, the incredible need to reduce production costs and the simplification of supply chains, has led the automotive industry to grow exponentially in the number of  plastic pieces in vehicles.

A recent study carried out by the Omega Plastics Group has concluded that between 2014 and 2020 the amount of plastic used in the manufacture of cars increased by 75%, this means that on average each vehicle manufactured previously had 200 kg. of plastic parts and came to have 350 kg of plastic parts.

The change is not only happening with the metal parts, the amount of glass that has been replaced by polycarbonate has also increased at an even greater rate.

In addition to this development, many car manufacturers are now looking at ways to make their vehicles more sustainable by using recyclable plastics. An example of a particular company that is putting this into practice is the luxury giant Lexus. Lexus has a short-term goal to make 95% of the body parts of its cars made of recyclable plastic.

Large car companies are abandoning the growth of their vehicles towards aluminum and directing the future towards plastic.

The future is coming!! Currently in the Brazilian market there is already a car with its body made entirely of plastic, Cherry's I-Car is a 100% electric and 100% plastic vehicle, that fact reveals the path of where the industry is going. (

Repairing plastic will not be in the very near future only welding a bumper or a headlight and will become the core work of a car repair shop.

For those in the automotive repair industry, training their team in plastic repair, and investing in the purchase of the right equipment to carry out that task, has now become the difference between being prepared for the future of the industry or just stay welding rusty parts.

bottom of page