Domoluce — Technology
The material
that lasts.
Every Domoluce object is rotomoulded — a process that builds from within, without pressure, without waste, without seams.
Rotomoulding does not cut,
press or inject.
It grows the object from inside.
Five steps.
One object.
Rotational moulding is one of the few manufacturing processes where the object forms itself. Polyethylene powder is loaded into a hollow mould, which then rotates slowly inside an oven. Heat melts the powder against every surface. No pressure. No injection. No joints. The result is a single, hollow, unbreakable form.
The powder
The process begins with polyethylene in powder form — ground to 35 mesh, a precise particle size that allows uniform melting. A measured charge of powder is loaded into the open mould, which is then sealed. The amount determines the final wall thickness.
The rotation
The sealed mould enters the oven rotating simultaneously on two perpendicular axes at 4–20 RPM. This biaxial motion is the heart of the process — it ensures the powder reaches every corner of the mould interior, regardless of its complexity.
The heat
Inside the oven at around 180°C, the rotating mould allows the powder to tumble continuously against the hot walls. The particles melt and fuse progressively, building up a uniform layer from the inside out. No injection gun. No pressure. Just gravity and rotation.
The cooling
The mould exits the oven and is cooled — with air, water mist, or both — while still rotating. Maintaining rotation during cooling is critical: it prevents the molten PE from sagging and ensures the final piece holds its shape exactly.
The object
The mould opens and the finished piece is removed. What emerges is a single, hollow, seamless object — exactly as designed. No post-processing, no assembly, no trimming of seams. The piece is complete the moment it leaves the mould.
Polyethylene.
The most recyclable
plastic on earth.
Of the seven main plastic families, polyethylene (PE) is the one with the most established recycling infrastructure worldwide. It is classified as resin code #2 (HDPE) and #4 (LDPE) — both accepted in virtually every recycling programme globally. Unlike composite or multi-layer materials, PE is a single-polymer material: it can be reground, remelted and reused without losing its fundamental properties. A Domoluce object that reaches the end of its life re-enters the material cycle as a new PE charge.
Beyond petroleum.
The bio-based future
of rotomoulding.
Conventional PE is derived from petroleum. Bio-based polyethylene — chemically identical, but produced from renewable plant sources — represents the next step. The challenge: bio-based and biodegradable polymers have narrower processing windows and behave differently at high temperatures.
Rotomoulding at 280°C is a demanding environment. Domoluce has been researching compatible bio-based polymers and modified processing conditions that allow bio-materials to be used without compromising the structural and aesthetic qualities of the final object.
The transition to bio-based materials is in active development. Our current objects are made with recycled conventional PE. Bio-based production will be introduced progressively as our formulations are validated.
PE re-enters the recycling stream at end of life. Resin codes #2 and #4 — accepted globally in standard PE recycling infrastructure.
Near-zero scrap in rotomoulding. Any unused powder is reground and returned to the next production cycle without quality loss.
UV-stabilised PE rated for over two decades of outdoor exposure. Resistance from −40°C to +60°C. No coating, no treatment required.
Active research into bio-based polyethylene for rotomoulding. Plant-sourced feedstock, identical chemistry, circular material life.