The storage conditions of PET bottle preforms are crucial to ensure their quality and performance.
First, temperature is a key factor. PET bottle preforms should be stored in a relatively cool and dry environment, and the ideal temperature range is usually between 15℃ and 25℃. High temperature environment may cause thermal deformation of the preform, affecting the stability of its size and shape. For example, if the storage temperature is too high, the preform may soften, twist, etc., and thus fail to form a standard bottle in the subsequent processing.
Humidity control should not be ignored either. PET bottle preforms should be stored in an environment with low humidity, and the relative humidity is generally required to be no more than 60%. High humidity environment may cause the preform to absorb moisture, which will not only affect its physical properties, but also cause quality problems such as bubbles and cracks during processing. Moreover, moisture absorption may also reduce the transparency and strength of the preform.
In addition, light-proof storage is also necessary. PET materials may age and degrade after long-term exposure to sunlight or strong light, resulting in yellowing of color and decreased performance. Therefore, it is important to choose a cool, light-proof warehouse or storage area.
In terms of storage methods, PET bottle preforms should be placed on flat, clean shelves or pallets to avoid direct contact with the ground to prevent moisture and contamination. At the same time, the preforms should be kept at an appropriate distance to allow air circulation and avoid excessive local temperature and humidity.
In addition, attention should be paid to dust and insect prevention. Dust and insects may adhere to the surface of the preforms, affecting their hygiene and quality. Therefore, the storage area should be kept clean and appropriate protective measures should be taken, such as installing screens and using dust covers.
Take a beverage production company as an example. If PET bottle preforms are not stored in the correct storage conditions, the preforms may absorb too much moisture and be affected by high temperatures in the hot and humid summer. When the bottle is blown, it is easy to have uneven wall thickness, poor transparency or even cracks, which will lead to production delays and increased costs.
In summary, in order to ensure the quality and performance of PET bottle preforms, storage conditions must be strictly controlled, including appropriate temperature, humidity, light avoidance, reasonable storage methods, and good dust and insect prevention measures. Only when these requirements are met can we ensure that the preforms can perform optimally in subsequent processing and use and produce high-quality PET bottles.
