PVC Stabilizer Errors and Solution Methods

Stabilizer selection and dosage are critical in PVC production. Use of wrong stabilizer; It may cause problems such as color change, burning, plaque formation, odor and mechanical performance decrease.

1. Common Stabilization Problems

1) Yellowing / Discoloration

Causes:

• Low stabilizer dosage

• Wrong Ca-Zn rate

• Long stay at high temperature

• Unsuitable lubricant

Solution:

• Optimize Ca-Zn or organic stabilizer dosage

• Reduce process temperatures

• Revise the lubricant system et

2) Plaque Formation (Plate-out)

Causes:

• Low heat stability

• Volatile component excess

• Lubricant incompatibility

Solution:

• Ca-Zn mixtures with higher stability

• Modified lubricant systems

• Low volatility plasticizers

3) Odor and Gas Output

Reasons:

• Incompatible plasticizer

• Insufficient stabilization

• Low pure raw materials

Solution:

• More stable systems such as DOTP / TOTM

• Stabilizers with low VOC level

• Purer PVC resin

4. Loss of Mechanical Performance

• Excessive stabilizer → brittleness

• Incomplete stabilizer → softening, weakening

Result

In PVC stabilization Problems can be easily resolved with correct stabilizer selection and process controls.