Improved foaming production process method for polyvinyl alcohol sponge

Abstract

The invention discloses an improved foaming production process method for polyvinyl alcohol sponge, and relates to the field of polyvinyl alcohol sponge production.The improved foaming production process method comprises the steps that under the condition that a molecular chain of polyvinyl alcohol has water solubility, the molecular side chain is modified, other functional groups are introduced, and a polyvinyl alcohol modified substance is formed; preparing the modifier into a 0.1%-2% aqueous solution to obtain bubble water with higher foaming performance, foaming the bubble water by using a foaming machine or a foaming machine, or directly stirring and foaming the bubble water to obtain stable foam slurry, adding the obtained foam slurry into a polyvinyl alcohol sponge slurry system to be foamed, uniformly stirring, and performing cross-linking curing to obtain the polyvinyl alcohol sponge slurry. In the crosslinking and curing process, the polyvinyl alcohol sponge and the polyvinyl alcohol sponge together become one part of a sponge body. The foaming agent solution is firstly foamed and then is mixed with the system slurry, so that the foam component and the system slurry can be quickly and uniformly mixed at a lower rotating speed without introducing gas by stirring the whole system slurry at a high speed, and the purpose of uniform foaming is achieved.

Description

technical field [0001] The invention relates to the field of polyvinyl alcohol sponge production, in particular to an improved foam production process for polyvinyl alcohol sponge. Background technique [0002] Polyvinyl alcohol sponge, refers to polyvinyl alcohol under the catalysis of acid, with at least one aldehyde in formaldehyde, acetaldehyde, glyoxylic acid, glyoxal, propionaldehyde, acrolein, butyraldehyde, glutaraldehyde Foam obtained by acetal reaction. [0003] The currently disclosed preparation methods of polyvinyl alcohol sponge include: pore-forming agent filling method, chemical foaming method, mechanical stirring method and the combination of the three. [0004] Pore-forming agent causes pore foaming. After dissolving polyvinyl alcohol, add pore-forming agent into the solution, then add catalyst, cross-linking agent and various improvement or dispersing agents. After cross-linking and curing, remove the pore-forming agent from the sponge removed to obtain ...

AI Technical Summary

Problems solved by technology

[0008] In the prior art, a large amount of air bubbles are generated in the cleaning process of the sponge, and the environmental pollution caused by the cleaned surfactant and its decomposition products along with the discharge of waste water, and the existing sponge needs to be cleaned to remove the harmful pollutants inside the sponge during the production process. A large amount of production water is consumed for substances such as porogens and surfactants, which may lead to relatively high labor costs, time costs and other production costs