Foam refers to the dispersion of air, carbon dioxide and other gases in water, oil, slurry, dyeing fluid and other liquids.Foam has two kinds of aggregation states, one is thin bubble, the interaction between bubbles is weak, will not gather into foam;The other is a thick bubble, and the foam in a thick bubble is dense, and a thick bubble is the real foam.Usually to the slurry, dyeing liquid and other components to add a small amount of a substance, in order to achieve the suppression of foam generation, this substance is called "antifoaming agent".

    In the warp sizing process, the foam is generated in the slurry barrel or slurry tank because the gas in the slurry is in continuous and sufficient contact with the slurry. Since the gas is the dispersed phase (discontinuous phase) and the slurry is the dispersed medium (continuous phase), The density difference between the gas and the slurry is very large, so in the slurry, the foam quickly rises to the surface of the slurry, at this time, if the surface tension of the slurry is small, the gas in the slurry will break through the liquid surface and gather into foam.It can be seen that the foam must meet three conditions: only when the gas and liquid are in continuous and sufficient contact, foam can be produced;When the density difference between the gas and the liquid is very large, the foam in the liquid can quickly rise to the liquid level, as time passes, it becomes foam;The liquid with less surface tension is more likely to bubble.

    There are roughly two ways to eliminate foam: physical method and chemical method.But we focus on the chemical method of defoaming with defoaming agents.Simply put, any such substance that can make foam disappear quickly by adding a small amount is called "antifoaming agent".

    Defoaming agent, also known as defoaming agent or defoaming agent, will produce many foams affecting production in the process of industrial production, so it is necessary to add defoaming agent.Widely used to remove latex, textile sizing, food fermentation, biological medicine, coating, petrochemical, papermaking, industrial cleaning, sewage treatment and other industries in the production process of harmful foam.

    Today we talk about the use of defoaming agents need to pay attention to the following points:

    One, fully stir: before use to dilute the emulsion reasonably, and then fully stir to uniform.

    Two, prevent frost and high temperature: defoaming agent in frost and high temperature conditions will affect its performance.

    Three, short-term use up: in order to ensure the concentration of defoaming agent and defoaming effect, it is necessary to use up the defoaming agent in a short time.

    Four, the viscosity is appropriate: to maintain the appropriate viscosity can give full play to the performance of defoaming agent.

    Five, forbid shock: strong shock will destroy the stability of defoaming agent.

    PP antistatic agent is a highly efficient compound surfactant, specially designed for polyolefin (LDPE, PP) products to provide long-term antistatic performance. Antistatic agent effect in thick products, film products on the obvious effect, can greatly reduce the surface resistance of parts, eliminate electrostatic harm.