EN SOLID CELLULOSE FOAM OBJECT FORMED BY ASSEMBLY OF AT LEAST TWO SOLID CELLULOSE FOAM PORTIONS

Patentradars sammanfattning

The invention addresses non-uniform shrinkage and long drying times inherent in producing large cellulose foam objects by instead manufacturing smaller individual foam portions and assembling them into a final object. Each portion, comprising 71–95 wt% cellulose fibres with water-soluble thickener and surfactants, is dried separately in geometries that minimize thickness variation, then joined via complementary protruding portions and recesses on mating connecting surfaces. The assembled object exhibits improved mechanical properties, including compression strength, due to additional stiff internal interfaces, and the overall process is more energy-efficient because smaller pieces dry faster and can be dried simultaneously.

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