Silicone Based Defoamer
Delivery term:The date of payment from buyers deliver within days-
Price:
Negotiable
- minimum:
- Total supply:
-
Delivery term:
The date of payment from buyers deliver within days
-
seat:
Shanghai
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Validity to:
Long-term effective
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Last update:
2021-05-15 18:23
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Browse the number:
429
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- Contactaixin:
Contactaixin:
tiansuo(Mr.)
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Email:
telephone:
phone:
-
Area:
Shanghai
Address:Room 480, Building 3, No. 3688, Tingwei Road, Caojing Town, Jinshan District, Shanghai
- Website:
+
AFC-7610 is a silicone defoamer.
The product can maintain good stability in industrial production and use.
It can keep excellent defoaming and antifoaming properties under acid-base and high shear conditions.It has excellent stability under high temperature and strong alkali system.
Mainly used in pulping mill, industry cleaning and other high alkali working system.
Product Details
Model no.: AFC-7610 Organic silicone defoamer.
Features
●Industrial cleaning, papermaking and pulping
●Excellent defoaming effect at high temperature and strong alkali temperature
●Excellent antifoaming performance
●Excellent dispersion performance
Application
●Pulping black liquor
●Alkali recovery
●Industrial cleaning
Performance parameters
Item |
Index |
Appearance |
White or yellowish emulsion |
pH |
6.0-9.0 |
Viscosity(25℃) |
1000~5000mPa·s |
Density |
0.9~1.1g/ml |
Solid content |
12±1% |
Continuous phase |
Water |
Packaging
25 kg, 50kg, 120 kg, 200 kg plastic barrel or ton barrels packaging.
Use method
●Direct addition：Pour defoamer into the system according to the specified amount.
●Continuous addition：Use dosing pump to add defoamer to the system at fixed point and quantity.
Shelf life: 6monthes
Storage：The storage period is half a year. This product is suitable for storage at room temperature, not near the heat source or exposed to the sunWhen not in use, the container shall be sealed to avoid harmful bacteria pollution.Slight delamination will not degrade product performance.
Transport：Sealing requirement,And avoid prolonged sun exposure.
In the pulping process, because the pulping raw materials contain natural substances such as fatty acids and resin acids, they react with the added chemicals such as caustic soda and sulfide alkali to generate foaming substances such as fatty acid soaps and resin acid soaps, plus The foam stabilizing effect of polymer materials.
When a large amount of air is brought into the slurry system during the flow and mixing of the slurry, a large amount of stable foam is formed, which brings great difficulties to the subsequent processes such as washing, transportation, and bleaching. Cause scumming and reduce pulp quality.
Some factories use 'clean water pressure foam', this method has a certain effect on removing foam, but the defoaming effect is not ideal.
The black liquor washed in the pulping process also contains high-concentration fatty acid soap, resin acid soap and other foaming and foam stabilizing substances. In order to facilitate operation and improve the recovery rate of pulp alkali, the black liquor must be defoamed.
The slurry in the papermaking process also contains foaming and foam stabilizing substances similar to the slurry in the pulping process. Air will also be mixed during the operation to generate foam.
The presence of foam has a great influence on the paper and makes the sizing poor degree, poor quantitative uniformity of the banner, spots on the paper surface, light transmission points and small holes, etc., even causing paper breaks.
In addition, if a large amount of foam is produced in papermaking white water, defoamer should be added to eliminate it to improve the recovery rate of pulp.
The defoamer for paper coating refers to the defoamer added during the preparation of the coating for coated paper. Due to the presence of foaming substances such as alkali and pigments in the paint, the process of preparing the paint requires mechanical stirring and grinding.These processes will introduce air into the paint to generate foam.
The viscosity of the paint is large and the foam is very stable.It is difficult to exclude, when coating on the paper, white spots will be generated on the paper, which will reduce the quality of the paper.
Therefore, an appropriate amount of defoamer must be added during the preparation of the coating paper.
On the other hand, the antifoaming agent for coating paper is different from the antifoaming agent for pulping. The antifoaming agent for pulping will be washed away during the washing section, and it is generally rarely left in the finished paper; and the defoamer agent for paper coating will be applied to the paper with the coating and left in the paper, which will affect the quality of the paper great.
Therefore, in addition to the defoaming and antifoaming function, the requirements for defoamer agents for paper coating must also have the following requirements: there is no side effect on the adhesion, dispersion and printability of the coating, if it can improve the gloss of the paper , increase pulling speed and lubrication performance, that will be better.
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