Hot filling is the process of sterilizing the product and inside of a bottle or container and cap or closure in order to ensure the safety of the product and prolong its shelf life. Without hot filling, harmful bacteria in the bottle or liquid could damage or contaminate the product, making it unsafe to consume or causing it to go bad before it should. This process will allow for a longer shelf life, resulting in fewer discarded products.
Hot filling can be done with glass or certain types of tough plastics that can withstand the high temperatures needed to thoroughly sterilize the bottle. It is typically used for bottles containing <4.5pH products such as:
- Juices
- Nectars
- Soups
- Spreads
- Flavored waters
- Isotonic drinks
- Vegetable drinks
- Marinades
How Hot Filling Technology Works
Hot filling can be done with glass or some plastics. A liquid is heated to a temperature of 194 degrees Fahrenheit to remove any harmful bacteria or microorganisms which may be in the product. The heated fluid is then put into the bottle, the bottle is capped, and then it is turned on its side or upside down to ensure the cap is sterilized properly as well. Finally, the bottle and product are rapidly cooled. This process must be done carefully as even a slight drop in temperature before the right time can result in improper sterilization and an unsafe product.
What Kind of Bottles to Use
While glass bottles have traditionally been used for hot filling, PET bottles can withstand the heat involved with hot filling without collapsing or becoming deformed. These bottles are growing in popularity because plastic is generally less expensive than glass.
The Benefits of Hot Filling with PET Bottles
There are many benefits to using the hot filling process with PET bottles to ensure the safety of your product. Among them are the following:
- Consumers can consistently trust the safety of your product
- Your products have a longer shelf life
- No preservatives will be needed – the product remains as natural as possible
- PET bottles are light weight and easier to transport than glass
- PET bottles are more cost effective than glass
- Taste, vitamins, and nutrients are preserved with this process
Come to MJS Packaging for all your packaging needs. We can guide you in the process of choosing the right packaging, bottles, or containers for your product, and can help you make the right choice when it comes to hot filling. We will also advise you about what kind of bottles to use to keep your products safe while staying within your budget.
To speak to one of our specialists about your hot filling needs, please contact us at 800.915.2262.
