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Natural latex / synthetic rubber foam spongeVulcanizer and dryer for natural latex / synthetic rubber foam sponge A very successful and mature application of Stalam RF technology is the drying of natural latex / synthetic rubber foam sponge. Since the mid-1980s, Stalam has provided a large number of RF dryers specially designed and manufactured to major manufacturers of natural latex and synthetic rubber (SBR) foam mattresses, pillows and continuous sheets in Europe and Asia. Recently, due to the cooperation with major experts and professional machinery manufacturers in the field of latex foam production, Stalam developed and launched the radio frequency vulcanization machine to the global market, thus completely changing the traditional Dunlop process.
Latex foam products are difficult to dry through the traditional hot air system for the following reasons: they are good thermal insulators, so the heat conduction in the substrate is very slow; Their physical morphology and structure make their permeability to the fluid very small, so the air convection is also seriously hindered; For the same reason, due to their chemical properties, the migration of water from the center to the product surface is essentially slow; In many cases, the products produced are thick, dense and bulky.
RF technology overcomes all these inconveniences, because: It does not rely on heat transfer, so even thick, large and dense items (mattress cores, pillow cores, etc.) can be dried quickly without overheating or yellowing on the surface; It is selective to water, so even the water in the center of the product will immediately absorb RF energy and quickly migrate to the surface, leaving no wet spots anywhere in the product; The energy transferred to the product (absorbed by the product) can be adjusted as needed, so that the evaporation rate and residual moisture content can be accurately controlled.
Similarly, these characteristics of RF equipment are also very suitable for vulcanization. Therefore, the combination of RF equipment or as an alternative to steam heating makes the process faster, so as to proportionally reduce the space required to achieve a certain production capacity, and significantly improve efficiency, thereby saving energy. In addition, due to the rapid, uniform and good permeability of RF heating (heating both inside and outside), the natural / synthetic latex is heated as a whole in a very short time, and the linear polymer quickly forms a network polymer through cross-linking. The product structure is more delicate, the density is uniform, and the physical property of the product is better.
benefit
Comparing with traditional methods, vulcanization and drying time are greatly shortened Energy saving up to 50% Better product quality Significantly reduce the floor space of equipment Higher versatility to meet changing market demands |