An eps heating and pressurized curing process

Abstract

The invention discloses an EPS temperature-increasing pressurizing curing process. The EPS temperature-increasing pressurizing curing process comprises the steps that EPS particles are conveyed to a pressure-loading tank; hot air of which the pressure ranges from 0.4 kgf / cm<2> to 0.6 kgf / cm<2> and the temperature ranges from 35 DEG C to 45 DEG C is injected into the pressure-loading tank; the pressure and temperature of the hot air in a tank body remain unchanged, and the EPS particles are stored for 0.5 h to 1 h; the hot air is injected into the pressure-loading tank again, and the pressure in the tank body is increased to 0.8 kgf / cm<2> to 1.2 kgf / cm<2>; the pressure and temperature in the tank body remain unchanged, and the EPS particles are stored for 0.8 h to 1.2 h; the hot air is injected into the pressure-loading tank again, and the pressure in the tank body is increased to 1.8 kgf / cm<2> to 2.2 kgf / cm<2>; the pressure and temperature in the tank body remain unchanged, the EPS particles are stored for 0.8 h to 1.2 h, and curing of the EPS particles is completed. Curing treatment is conducted on EPS in a temperature-increasing pressurizing mode, the curing effect is good, and the negative pressure recovery rate in cell reaches 99%.

Description

technical field [0001] The invention relates to the field of curing of expandable polystyrene, in particular to an EPS heating and pressurizing curing process. Background technique [0002] At present, there is a certain amount of foaming agent and water vapor in the pre-released EPS (Expandable Polystyrene) particles at home and abroad. After the EPS foam leaves the reactor, it condenses into a liquid, and the liquid foams. When the agent dissolves into the EPS again, the pressure in the air bubbles drops rapidly, negative pressure (vacuum state) appears in the cells in the EPS cells, the cells of the cells collapse and are prone to deformation. In order to make there is no negative pressure in the cells, the EPS cells are usually stored in the silo for at least 12 hours to stabilize the cell pressure. This process of cell pressure stabilization is called aging. The traditional curing process has the following disadvantages: 1. The curing effect is poor, and the negative p...

AI Technical Summary

Problems solved by technology

The traditional curing process has the following disadvantages: 1. The curing effect is poor, and the negative pressure recovery rate in the cells is only 90%; 2. It takes a lot of time, which prolongs the production cycle and is not conducive to changes in production plans; 3. Occupies a large number of silos , a pre-blowing machine needs to be equipped with 3 silos with a volume of 15 cubic meters, and the investment cost is huge

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