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Key Factors Affecting Shelf Life:
1. Temperature Control:
Temperatures below 30°C significantly extend shelf life; temperatures above this accelerate the prepolymerization reaction of the resin.
2. Humidity and Moisture:
Maintaining dryness is crucial to prevent resin moisture absorption and reduce viscosity changes. A humid environment leads to resin performance degradation.
3. Light and UV Exposure:
Direct sunlight triggers photo-oxidation, causing yellowing and shortening shelf life; storage away from light is necessary.
4. Packaging Sealing:
Using sealed white PE bags or bulk packaging (e.g., 750kg) prevents air and moisture from entering, ensuring stable storage for over one year.
5. Storage Time Benchmark:
The shelf life of conventional polyester resins at room temperature is approximately six months to one year, depending on the formulation and packaging.
