PVA polyvinyl alcohol is a biodegradable water-soluble organic high molecular polymer. It is widely used as a raw material of vinylon in textile sizing, coatings, adhesives, emulsifiers, films and other industrial fields. It is also natural gas. An important downstream product in the chemical industry. Polyvinyl alcohol is a raw material for organic chemicals and chemical fibers. It is generally dissolved in a certain concentration of aqueous solution before being used in downstream processes. However, polyvinyl alcohol will produce a large amount of foam during the dissolution process, which will affect the use of the product. We can eliminate bubbles and improve product quality by adding polyvinyl alcohol defoamer.
(Picture: PVA polyvinyl alcohol foaming scene)
Reasons for foaming during the dissolution of polyvinyl alcohol:
PVA contains surfactants, so bubbles are likely to be generated during the dissolution process;
Encountered with strong impact and agitation, it is easy to produce a large amount of foam when the air is drawn into it;
The gas produced by the thermal decomposition or fermentation of the treatment agent produces a large amount of foam;
The surface tension of the gas-liquid interface is reduced to form blisters.
The hazards of polyvinyl alcohol foaming:
Reduction of production capacity: In order to be able to contain foam and prevent overflow, in the dissolution process, the amount of feed in the cooking pot and other equipment should be reduced by about 10 to 30%, which will lead to a decrease in production;
Rising production cost: As the foam stays in the solution, the reaction cycle is prolonged, the power consumption rises, and the output rate of a single tank will decrease, which ultimately leads to an increase in production costs;
The foam in the solution may eventually be brought into the final product, thereby affecting the product quality;
Foaming of polyvinyl alcohol will affect the service life.
(Picture: PVA polyvinyl alcohol foam hazard)
What are the advantages of PVA polyvinyl alcohol defoamer
The polyvinyl alcohol defoamer developed and designed by Nanhui defoamer manufacturer is a defoamer refined by modified polyether silicon through a special process. Nanhui polyvinyl alcohol defoamer has the following advantages
Factory direct sales, cost-effective, one-to-one solutions;
A sample of water-based adhesive defoamer can be provided free of charge.
The defoaming agent has fast defoaming speed and long-lasting foam suppression effect.
Good dispersibility, simple and convenient to use, and low dosage.
Polyvinyl alcohol defoamer has good thermal and chemical stability, can produce a stable unbalanced surface tension in the foam, control the foam in the entire production process, completely eliminate all kinds of bubbles, and improve product quality .
(Nanhui PVA polyvinyl alcohol defoamer)
