Pressure regulating device and pressure regulating method for preparing hot melt adhesive

Abstract

The invention relates to the technical field of hydraulic pressure, in particular to a pressure regulating device and pressure regulating method for preparing a hot melt adhesive, and the pressure regulating device for preparing the hot melt adhesive comprises a shell body and a piston pressure regulating assembly arranged in an inner cavity of the shell body. The piston pressure regulating assembly divides the inner cavity into an upper cavity and a lower cavity which not communicate with each other. A pressure through hole communicating with the inner cavity of an isolation sleeve is formed in the upper cavity, and a pressure guide hole communicating with the inner cavity of a reaction kettle is formed in the lower cavity. The piston pressure regulating assembly is suitable for moving up and down in the inner cavity when pressure difference is generated between the upper cavity and the lower cavity, so that the air volume of the upper cavity and the lower cavity is changed, and the pressure in the inner cavity of the isolation sleeve and the pressure in the inner cavity of the reaction kettle are further regulated until the pressures of the inner cavity of the isolation sleeve and the inner cavity of the reaction kettle reach new balance. The pressure regulating device and the pressure regulating method for preparing the hot melt adhesive can effectively solve the problem that the isolation sleeve is damaged due to a traditional pressure regulating device and a traditional pressure regulating method.

Description

technical field [0001] The invention relates to the field of hydraulic technology, in particular to a pressure regulating device and a pressure regulating method for preparing hot melt adhesives. Background technique [0002] Hot-melt adhesive is a solvent-free solid adhesive with thermoplastic resin as the main component. Because hot melt adhesive has the advantages of fast bonding speed, non-toxicity, simple bonding process and good bonding strength and flexibility, it is widely used in fiber and packaging industries. [0003] Existing hot-melt adhesives are usually prepared using high-pressure reactors. During the preparation process, the pressure inside the tank will gradually increase with the reaction process, while the pressure in the inner cavity of the isolation sleeve will remain unchanged. As a result, the isolation sleeve is broken, and the reactant infiltrates into the inner cavity of the isolation sleeve. [0004] For this reason, the patent CN 110848204 A ...

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Problems solved by technology

[0005] Since the solution realizes the pressure balance through the spring, but due to the various defects of the spring, in the actual use process, it will still cause the inner cavity of the spacer sleeve to be easily damaged

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