Must-See for PVC Production! Calcium-Zinc Stabilizer Blooming? 5 Solutions to Fix It

创建于10.31

Friends engaged in PVC-related production may have encountered this: sudden blooming of calcium-zinc stabilizers, which not only affects product appearance and quality but also may delay production schedules. In fact, this problem is related to many details in actual production, such as water hardness, pH value, the dosage and method of adding stabilizers, as well as the temperature, pressure and raw material ratio during PVC processing. To address this troublesome issue, here are several practical and easy-to-operate solutions:

一、First, Adjust Water Quality: Reduce Blooming Risks at the Source

1.Control water hardness: The solubility of calcium-zinc stabilizers in water depends entirely on water hardness—the harder the water, the easier the stabilizers are to settle and bloom. Therefore, finding ways to reduce water hardness can minimize this situation at the source.

2.Adjust PH value: If the water is acidic, stabilizers are more likely to "leach out" and form blooms. Adjusting the pH value to an appropriate range (usually slightly alkaline) can significantly reduce blooming.

二、Optimize Stabilizer Usage: Correct Dosage and Method

1.Control stabilizer concentration: Many people think "the more you add, the safer it is", but this is not the case—too low a concentration is prone to blooming, while too high a concentration is a waste and may contaminate raw materials. It’s best to adjust according to actual production conditions to find a balance of "no waste and no blooming".

2.Improve feeding method: Stop adding all at once! Try "alternate feeding": add slowly first to allow the stabilizer to fully dissolve in water, and once evenly dissolved, gradually increase the concentration to the target value. This will greatly reduce the probability of blooming.

三、Improve PVC Processing Technology: Solutions Lie in Details

1.Set mixing temperature reasonably: As seasons change, temperature and humidity also change, so the mixing temperature cannot remain unchanged. Adjusting the temperature according to the season to maintain a stable mixing process will naturally reduce blooming risks.

2.Upgrade equipment and processes: For example, adding advanced equipment such as a "pre-cooling device" to the production line or optimizing the processing flow can directly reduce the generation of blooms, which is both hassle-free and efficient.

四、Strictly Control Material Quality: High-Quality Raw Materials = Fewer Problems

1.Choose high-quality stabilizers: Don’t opt for low-quality stabilizers just to save money! Substandard products are inherently prone to inducing blooming. Choosing high-quality products that meet standards can save a lot of trouble.

2.Improve material purity: The more impurities in raw materials, the faster stabilizers bloom. Usually, pay attention to reducing the proportion of impurities in materials and improving purity to fundamentally slow down blooming.

五、Do a Good Job in Storage: Post-Production Protection is Also Key

1.Control storage temperature: After pipe fittings are produced, do not leave them in places with excessively high or low temperatures for a long time—extreme temperatures will accelerate stabilizer blooming, and room temperature storage is safer.

2.Maintain a dry environment: Humidity is an "accomplice" to blooming! The storage environment must be dry to avoid pipe fittings getting damp, making it difficult for blooms to form.

In short, solving the problem of calcium-zinc stabilizer blooming cannot focus on just one link. By making joint efforts from multiple dimensions—water quality adjustment, stabilizer usage, process improvement, material selection, and post-production storage—blooming can be effectively reduced, making product quality more stable and production smoother.

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