In the production of PVC foamed profiles, the scientific formulation of stabilizers directly affects product quality. The following are the key adjustment points:

1. Stabilizer Formulation

• Recommended dosage of specialized composite stabilizers for foaming: 3.5-4.5 phr

• Epoxidized soybean oil is recommended as a co-stabilizer to enhance synergistic effects

2. Process Parameter Settings

• Processing temperature should be maintained at 165-180°C

• Screw speed is recommended at 20-35 rpm

• Special attention should be paid to maintaining uniform die temperature, which is crucial for ensuring foaming quality

3. Formulation Coordination

• Proper use of foaming modifiers to improve melt strength

• Precise balance of internal and external lubricant ratios

• Focus on controlling the decomposition temperature of foaming agents to ensure good compatibility with the stabilizer system

Practical data show that the optimized stabilizer system can improve cell uniformity by over 30%, with product density deviation stabilized within ±0.02 g/cm³. It is recommended to establish a dynamic monitoring mechanism to regularly evaluate the effectiveness of stabilizers.

Production Management Recommendations:

• New batches of stabilizers must undergo trial verification

• Strict implementation of equipment cleaning and maintenance systems

• Establishment of comprehensive process parameter archives

• Strengthen raw material quality control

Through scientific adjustment of the stabilizer system, not only can the quality stability of foamed profiles be ensured, but production efficiency can also be effectively improved, significantly reducing production costs.

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#PVC_stabilizer #PVC_foaming_agent#PVC_processing_aid#WPC_additive#PVC_lubricant#Chemicals#Chemical_auxiliary_agent#PVC#PVC_additives