What is PolyAl (Roof Tile)?
Approximately 25–30% of the weight of each Tetra Pak package consists of aluminum and polymer layers.
After the paper pulp is separated from the Tetra Pak packages, a polymer–aluminum composite, known as PolyAl, remains.
With innovation and technical expertise, Mehrtam Company has successfully developed a practical product from this PolyAl composite.
PolyAl composites, produced using advanced materials and processes, are converted into flat or corrugated PolyAl sheets that possess unique properties such as flexibility, light weight, thermal and acoustic insulation, shatter resistance, long lifespan, reusability, and moisture resistance.
These sheets have a wide range of applications, including:
- Roof coverings (for parking lots, warehouses, houses, villas, pergolas, and portable cabins),
- Insulated walls,
- Partitions,
- Box manufacturing,
- Container and cabin construction.
What is Long-Fiber Paper and What Are Its Applications?
- Cellulose fibers are derived from plants and trees and are used in the production of carton, paper, and cardboard. Longer fiber length increases the strength and durability of the resulting paper or cardboard.
- Fibers obtained from trees are generally longer than those extracted from plant stalks and leaves, such as sugarcane or straw. Among trees, coniferous (softwood) species have longer fibers compared to most broadleaf (hardwood) trees.
- The paper used in multi-layer packaging (like Tetra Pak) contains long fibers, and since these fibers have never been through the recycling process, they are considered long and pure fibers, giving them high commercial value.
- As mentioned, the source of these fibers—coniferous trees—is scarce in Iran, making them even more valuable domestically.
- The brown paper pulp obtained from Tetra Pak recycling contains about 60–70% long fibers and is used in the paper industry, especially for producing semi-kraft paper, test liner paper, and filter paper. Using as little as 10% of this pulp can increase the tensile strength of the final paper by up to 20%.
