how to make good quality pvc seal strip for carsIn the automotive sealing strip industry, most of the sealing strip products are mainly soft PVC (hardness range is HA50-HA85). Since the glass transition temperature of PVC resin is about 75°C, it is particularly sensitive to temperature changes, and it is very brittle when the temperature is low. Therefore, for automotive PVC seal manufacturers, it is imperative to improve the cold resistance of PVC seals.
Through the following series of formula adjustment methods, the cold resistance of PVC materials can be improved to meet the low temperature requirements:
1. Choose the appropriate grade and polymerization resin
2. Select a plasticizer with better cold resistance and the appropriate dosage
3. Introduce some polymer modifiers with cold resistance
4. Add filler with small plasticizer absorption