What are the main components of metalworking fluid defoamers? What are the applications?

The metalworking fluid defoamer is made of raw materials containing special modified silicon and polyether through a special process, which is easily soluble in water, and is especially suitable for continuous defoaming and foam inhibition under the conditions of high temperature, strong acid and alkali, high shear force and high pressure.

Metalworking fluid defoamer has a wide range of applications, which are used in metal cutting fluids, metal processing, high water content hydraulic fluids, glycol hydraulic fluids, solvent cleaning, acid and alkali aqueous cleaning agents, coolants, grinding (oil) fluids, wire cutting fluids, automatic assembly line cleaning machines, large cleaning machines, lubricating (oil) fluids, saponified oils, EDM working fluids, drilling fluids, fine grinding fluids, etching fluids, electrolyte wire cutting fluids, alkali extraction process defoaming, dehydrating agents and other occasions.

Look at the kind of cutting fluid defoamer you are referring to, like metal cutting fluid defoamer, which is mainly composed of special modified polyether and fluorine-containing raw materials through a special process, soluble in water, more suitable for continuous defoaming and foam inhibition under the conditions of high temperature, strong acid and alkali, high shear force and high pressure. It can be widely used for foam removal and inhibition in a wide range of harsh systems over a wide temperature range.

Defoamers include active ingredients such as silicone oils, polyethers, higher alcohols, mineral oils, vegetable oils, etc. It reduces the tension on the surface of the liquid, thus eliminating foam.

The main ingredient of metalworking fluid Longtai defoamer is polyether, which is used in the metalworking fluid stock solution and added to the groove edge of the machining site, and can also be applied to industrial cleaning degreaser.

The use of defoamers in metalworking fluids is not only dependent on their good defoaming properties, but also on other properties, such as good compatibility or their effect on paintability. Therefore, it is necessary to carefully choose the defoamer.

A large amount of foam generated by metal cutting fluids in practical applications causes the loss of cutting fluids and brings unnecessary effects to production. Therefore, a certain amount of defoamer needs to be added to the metal cutting fluid to control the foam at a normal level.

Defoaming principle. In general, an effective defoamer must meet the following conditions:

1) Must have a higher surface activity than the foamed surfactant, i.e. it must have a lower surface tension.

2) It must be insoluble (at least partially insoluble insoluble in) in the foaming medium, otherwise it will act as a surfactant itself, i.e. play a foam stabilizing role.

3) The droplet size of the defoamer should be within the thickness of the foam layer.

Defoamers in cooling lubricants (metalworking fluids)In water-miscible cooling lubricants, foaming often occurs due to the use of epoxidized emulsifiers and other surfactants. In addition, the structure of the equipment can significantly influence the foaming trend.

Requirements for metalworking fluid defoamers:

Antifoaming and defoaming properties.

It can be stably mixed with metalworking fluids.

Self-stability of the defoamer.

There is no negative impact on subsequent processing.

Classification of defoamers.

In general, there are three types of defoamers added to metalworking fluids:

Organic oil defoamer.

Silicone oil defoamer.

Organically modified siloxane defoamer.

The composition of the defoamer mainly includes the active ingredient, the emulsifier, the carrier and the emulsifying aid.

Among them, the active ingredient is the most important core part, which plays a role in breaking foam and reducing surface tension; Emulsifiers disperse the active ingredient into small particles for better dispersion into oil or water for a better defoaming effect.

The carrier accounts for a large proportion of the defoamer, and its surface tension is not high, which mainly plays the role of a support medium, which is beneficial to the foam inhibition and defoaming effect, and can reduce the cost; Emulsifying aids are used to make the emulsification effect better.

Defoamer is an additive that eliminates foam. In the production and application process of coatings, textiles, medicine, fermentation, papermaking, water treatment and petrochemical industries, a large amount of foam will be generated, which will affect product quality and production process. Based on the suppression and elimination of foam, a specific amount of defoamer is usually added to the production process.

Metalworking fluid defoamers mainly include silicone defoamers, polysiloxane defoamers, polyether defoamers, polyvinyl alcohol defoamers, etc. They are mainly used in metalworking fluids, which can effectively inhibit the formation of bubbles and foam on the surface of the liquid, and at the same time can improve the stability and durability of metalworking fluids, thereby improving production efficiency and product quality.

Here are a few types of metalworking fluid defoamers:

Silicone defoamer: Because of its high efficiency, low toxicity and low volatility, it is widely used in metalworking fluids. Silicone defoamers form a stable lipid layer on the surface of the liquid, effectively inhibiting the formation of bubbles and foam.

Polysiloxane defoamer: This defoamer has good high temperature resistance, chemical stability and biodegradability. Polysiloxane defoamers can reduce the tension on the surface of the liquid, so that the gas is not easy to form bubbles and foams in the liquid.

Polyether defoamers: Polyether defoamers are commonly used at higher temperatures in metalworking fluids and can effectively inhibit foam formation without negatively impacting processing efficiency and product quality.

Polyvinyl alcohol defoamer: This defoamer is commonly used in metalworking fluids and detergents, with good dispersion and stability, which can effectively reduce the tension on the surface of the liquid, thereby inhibiting the formation of bubbles and foam.

The types of Longtai defoamers for metalworking fluids include: Longtai polyether defoamer, silicon polyether defoamer, fluorine-containing defoamer.

Metalworking fluids often foam due to the addition of chemical additives, the intake of air from pumps, and the high-pressure environment during metalworking.

The metalworking fluid defoamer can eliminate the foam well, has a good defoaming effect, long foam inhibition time, and can quickly eliminate all kinds of micro bubbles; The addition to the metalworking fluid will not affect the performance and effect of the metalworking fluid, and will not change its appearance and color; It has good compatibility, and can be quickly dispersed when added to metalworking fluid, without oil bleaching and precipitation; It can also be quickly defoamed and suppressed for a long time in high pressure, high shear, high temperature, strong acid and other environments.

Metalworking fluids are mainly metalworking liquids, which mainly play the role of lubrication and cooling, as well as anti-rust cleaning and other functions. General metalworking fluids include cutting fluids, cutting oils, emulsions, stamping oils, quenching agents, high-temperature oils, extreme pressure cutting fluids, grinding fluids, antirust oils, cleaning agents, blackening agents, drawing oils, thickeners, etc.

Causes of foam formation.

Aqueous metalworking fluids contain surfactant components such as emulsifiers, dispersants or lubricants in addition to base oils. While these components are critical to the performance of metalworking fluids, they often form foam during production or application, affecting lubrication, resulting in inefficient cooling and plant contamination.

Defoaming principle. The addition of defoamers significantly reduces the surface tension at the site, which is generally less soluble to water, and the reduction of surface tension is limited to the part of the foam, while the surface tension around the foam hardly changes. The part of the surface tension is strongly pulled and extended in all directions, and finally the bubble bursts.

DTW Chemical's metal cutting fluid defoamer can replace imported defoamers by using a special silicone grease system and a special emulsification system, which ensures the compatibility, dilution stability and excellent shear stability of the system, and is very suitable for foam control of metal cutting fluid systems, with very low addition amount and long-term foam inhibition.

Defoamer for metalworking fluids.

Product Overview: Metalworking fluid defoamer is a defoamer developed for metal surface treatment and industrial cleaning, which can quickly eliminate stubborn foam caused by a variety of surfactants, and can be stably defoamed at strong alkali and high temperature, with long-lasting foam inhibition performance.

Product model:--HY-1040T

Appearance: - Yellow transparent liquid.

Active content: -100%.

pH: -5-8

Applications: Used in metal cleaning agents, chemical industry cleaning agents, metal processing, etc.

Product features: It has good foam inhibition and bubble breaking ability. In high-temperature and strong alkali systems, defoaming is rapid. It has good stability and is quickly compatible.

How to use: can be added directly, the general addition amount is the total foaming system, please test the specific dosage.

Packaging & Storage:

This product comes in 20kg 180kg drums. Store tightly sealed in a cool, ventilated and dry place.

The function of the defoamer is to reduce the surface tension of the processing fluid, and the intuitive effect is to defoam.

Defoamers reduce the surface tension of the process fluid, which can change the wetting ability of the liquid (easy to adhere to the surface of the object);

Certain components in metalworking fluids can cause soap-like foam to form during use, causing various adverse effects. Defoamers control the amount of foam produced.

In daily life and production, foam brings people colorful, fantasy and fun, but also increases people's troubles. In life and production, many operations or processes often become serious problems due to the production of large amounts of foam. The textile industry from spinning, spinning, weaving, printing and dyeing to the finished product in the processing process, all kinds of auxiliary chemicals are used, which give textiles a variety of excellent application properties, improve the quality of textiles, improve processing effects, improve production efficiency, simplify the production process, reduce production costs.

This auxiliary chemical is commonly known as textile dyeing and finishing auxiliaries. Due to the large use of textile dyeing and finishing auxiliaries, a large amount of foam is produced in the wet processing process of textile dyeing and finishing, which makes the production operation inconvenient, the production capacity is reduced, the product quality is reduced, and the normal operation is difficult. Therefore, the textile dyeing and finishing industry should eliminate harmful foam.

1) Products based on natural products: animal and vegetable oils, mineral oils and compounds, etc.;

2) Polyether type: block copolymer with polyoxyethylene polyoxypropylene, modified polyether, etc.;

3) Silicone defoamers with polysiloxane as the main raw material include: pure silicone oil, silicone oil solution, silicone paste, silicone oil emulsion, powder, and block.

According to the dosage form, the defoamer can be divided into: solution, emulsion, powder, paste, and block. Defoamers are divided into food, pharmaceutical, and fermentation according to their uses; papermaking, printing and dyeing auxiliaries; oil extraction, storage and transportation, refining, lubricating oil; chemical production; Metal cutting fluids, chemical cleaning, water treatment, and more.

According to the focus of the performance, defoamers can be divided into: defoamers, antifoam agents and deaerators.

Silicon-based and non-silicon-based defoamers are used in different processes in the textile printing and dyeing industry, and the actual use performance has its own advantages and disadvantages. Silicon-based defoamer has the advantages of strong defoaming performance, long-lasting foam inhibition, low dosage, stable chemical properties, high temperature resistance, non-volatile and non-toxic, etc., and is an important development direction of textile dyeing and finishing auxiliaries. In the dyeing and finishing of textile fabrics, defoamer water emulsions containing polysiloxane 1% and 2o% are usually used.

The dosage of defoamer for metalworking fluids needs to be evaluated and selected according to the situation of Shibi Xunji, and in general, the dosage of defoamer is used, and the specific amount of defoamer needs to be adjusted according to the actual situation. Here are some of the factors that affect the amount of defoamer used:

1.Types of processing fluids: Different types of processing fluids have a certain impact on the amount of defoamers, and generally speaking, high-concentration, high-viscosity, and high-temperature processing fluids need to use more defoamers.

2.Properties of the process fluid: The properties of the process fluid can also affect the amount of defoamer used, such as the grease content, surface tension, viscosity, etc. in the process fluid.

3.Conditions of use of process fluid: The conditions of use of process fluid will also affect the amount of defoamer used, such as the circulation rate of the process fluid, the degree of oxidation, the gas content, etc.

It should be noted that the amount and proportion of defoamer need to be appropriate to avoid excessive use and waste, and at the same time, it needs to be used in accordance with the instructions on the instructions to avoid harm to the human body and the environment.

The amount of metalworking fluid defoamer is 1 to 3 parts per thousand.

The main components of high-efficiency industrial defoamers usually include the following:

Silicone compounds: Silicone compounds are a commonly used defoamer ingredient with excellent defoaming properties and stability.

Polyether compounds: Polyether compounds are also commonly used as defoamer components with excellent defoaming properties and chemical stability.

Sodium carbonate: Sodium carbonate is a commonly used defoamer ingredient that can be used at high temperatures and pressures and has excellent defoaming results.

Calcium oxide: Calcium oxide is also a commonly used defoamer ingredient that can be used at lower temperatures and has excellent defoaming effects.

Chemicals: Certain chemicals or combinations can also be used as defoamer ingredients, such as aluminum sulfate, phosphate, silicate, etc.

These ingredients can be blended and processed by a variety of methods, such as solution calling, emulsion, spray drying, etc., to meet different defoamer application scenarios and needs.

The composition of defoamer mainly includes active ingredients, emulsifiers, carriers and emulsifying additives, of which the active ingredient is the most important core part, which plays the role of breaking foam and reducing surface tension; Emulsifiers disperse the active ingredient into small particles for better dispersion into oil or water for a better defoaming effect. The carrier accounts for a large proportion of the defoamer, and its surface tension is not high, which mainly plays the role of a support medium, which is beneficial to the foam inhibition and defoaming effect, and can reduce the cost; Emulsifying aids are used to make the emulsification effect better.