The vertical method continuous production of PU soft foam technology is a new technology developed and patented by British Hymon National Co., Ltd. in the 1980s. The reason why the vertical process technology has attracted the attention of the polyurethane industry and has achieved rapid development is inseparable from its outstanding advantages. The characteristics of the process are: ①The land area is greatly reduced, only 600㎡; ② The total material flow rate is reduced to 20, 40kg/min; ③The same equipment can produce round foam blocks and rectangular foam blocks, and only need to replace some parts to produce alternately; ④The size of the foam block is relatively regular, and the trimming waste can be reduced to 4%~6%; ⑤ On the same cross-section, the distribution of foam physical properties is uniform; ⑥The loss of start/stop is reduced, and the length of defective products is about lm. This process is suitable for small and medium-sized factories with an annual output of 500~4000t. At the same time, the investment cost is low and labor is saved. The vertical method process consists of several steps such as raw material storage, metering, mixing, input, foaming, aging, foam lifting, cutting, and foam delivery.

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