Polyether defoamer GP-330 is typically used by direct addition or dilution before addition. The recommended dosage is generally 0.01% to 0.3% of the total system weight. The optimal dosage should be determined through experiments based on actual working conditions.
Detailed Explanation
Polyether defoamer GP-330 (glycerol polypropylene ether) is in liquid form, easy to use. It can be added directly by metering or diluted with water or system liquid before addition. Its good water dispersibility allows it to be evenly distributed in aqueous systems without easy stratification or sedimentation, thus continuously exerting defoaming and foam-inhibiting effects.
In practical use, it is recommended to add it in advance during the process stage before foam generation (such as stirring, mixing, circulation, etc.) to fully utilize its long-lasting foam inhibition. If used to break existing foam, the defoamer can be directly dripped or sprayed onto the foam surface, and GP-330 can achieve rapid foam breaking in a short time. For continuous production processes, continuous dosing via a metering pump is recommended to maintain a stable defoamer concentration in the system and ensure sustained foam inhibition.
Application Suggestions
Based on the usage characteristics of different application fields, the following addition methods are recommended for reference:
- Water-based coatings/inks: Add 0.05%~0.2% of the total formulation during the grinding and dispersion stage to effectively reduce bubbles during dispersion and filling, preventing defects such as shrinkage holes and pinholes in the coating film.
- Adhesives: Add 0.05%~0.2% during the stirring and mixing stage to eliminate foam generated during stirring and glue application, ensuring uniformity of the adhesive layer.
- Textile dyeing and printing: Add 0.02%~0.1% in the dye bath or finishing bath to inhibit foam under high temperature and high shear conditions, avoiding dye color spots and stains.
- Industrial water treatment: Add 0.01%~0.1% of the system circulating water volume, using a metering pump for continuous dosing to suppress foam in aeration and circulating water processes.
- Metalworking fluids/industrial cleaning: Add 0.05%~0.3% during the formulation stage to reduce foam accumulation during cutting, grinding, and cleaning processes.
- Paper making process: Add 0.02%~0.1% in the pulping or papermaking section to control foam and prevent paper defects and air spots.
The above dosage ranges are general industry empirical values. The database does not contain precise recommended addition amounts for GP-330 in specific application scenarios. Users are advised to conduct small-scale tests based on their own process conditions to determine the optimal dosage.
Precautions
- Shake or stir the product thoroughly before use to ensure uniformity.
- Diluted working solution should be used within 24 hours to avoid loss of efficacy due to prolonged storage.
- Add slowly and evenly while stirring to ensure full dispersion of the defoamer in the system.
- Avoid excessive addition at one time, which may cause shrinkage holes in the coating film or compatibility issues in the system.
- It is recommended to wear protective gloves and goggles during operation to avoid direct contact with skin and eyes.
- Store the product sealed in a cool, dry environment at 5℃~35℃, avoiding freezing and high temperature storage.
- The specific addition method and dosage should be based on actual process test results.
