How long is the shelf life of plant hollow capsules?
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The shelf life of plant hollow capsules is usually 2-3 years, but the specific duration is affected by factors such as raw materials, production processes, and storage conditions. The following are detailed explanations and suggestions for extending the shelf life:
1, Core influencing factors of shelf life
Raw material characteristics
Plant cellulose source: Capsules made from materials such as hydroxypropyl methylcellulose (HPMC) and pullulan polysaccharides have a stable molecular structure and a generally long shelf life (2-3 years).
Additive type: If it contains natural preservatives (such as rosemary extract) or antioxidants, it can extend the shelf life to more than 3 years; But if not added, the shelf life may be shortened to 1.5-2 years.
production process
Sterilization technology: Capsules sterilized by irradiation (such as gamma rays) or ethylene oxide have low microbial residues and a shelf life of up to 3 years; Ordinary high-temperature sterilization products may last for 2 years.
Sealing: The sealing process of the capsule shell (such as hot melt sealing) affects moisture penetration, and products with poor sealing are prone to moisture absorption and deterioration, shortening the shelf life to 1-1.5 years.
storage environment
Temperature: The optimal storage temperature is 15-25 ℃. If the temperature is too high (>30 ℃), it will accelerate the oxidation of the raw materials, causing the capsules to become brittle or discolored; Low temperature (<5 ℃) may cause cellulose crystallization and affect solubility.
Humidity: The relative humidity should be controlled between 30% -60%. When the humidity is above 70%, the capsule is prone to moisture absorption and adhesion, while when the humidity is below 20%, it may become brittle.
Light exposure: Avoid direct sunlight, as ultraviolet rays can degrade plant cellulose, causing the capsule to turn yellow or lose elasticity.
2, Reference for shelf life of different types of plant hollow capsules
| Capsule Type | Typical Ingredients | Shelf Life Range | Application Scenarios |
|---|---|---|---|
| Hydroxypropyl Methylcellulose Capsule | HPMC, Glycerin | 2-3 years | Pharmaceuticals, Health Supplements (require high stability) |
| Pullulan Capsule | Pullulan, Water | 1.5-2.5 years | Food, Cosmetics (require rapid dissolution) |
| Starch-based Capsule | Modified Starch, Carrageenan | 1-2 years | Low-cost Pharmaceuticals or Dietary Supplements |
| Alginate Capsule | Sodium Alginate, Calcium Chloride | 1.5-2 years | Specialty Pharmaceuticals (e.g., enteric-coated, sustained-release) |
3, Purchase suggestions
View tags: Prioritize products labeled with "shelf life until XX year XX month" to avoid vague statements that only indicate "production date".
Certification qualifications: Choose manufacturers that have passed ISO 22000, HACCP, or GMP certification to ensure product stability.
Small batch procurement: Purchase an appropriate amount of capsules based on usage frequency to reduce the risk of inventory backlog.
