How to disinfect plastic bottles

Plastic bottles are widely used in the food industry. Specifically, they are used for packaging and storing water, as well as for multiple household purposes. However, in order to maintain the sensory properties of the contents, it is important to disinfect the containers. Sterilization helps eliminate pathogens and preserve the contents fresh and suitable for use over an extended period of time. Therefore, the question of how to disinfect plastic bottles is highly relevant for liquid product manufacturers. Let's explore the methods used for this purpose in both industrial and home settings.


Methods of Disinfecting Plastic Bottles

PET bottles provide good protection for their contents against pathogens and various substances from the external environment. However, in order to maintain freshness and suitability, it is important for the packaging to be clean at the time of filling. For this purpose, plastic bottles undergo disinfection.

There are various methods used for disinfection. Among the most popular industrial methods are:

  • saturated steam (t°C up to 100);
  • hot dry air or superheated steam;
  • cold disinfection;
  • hydrogen peroxide. A 30-40% solution is used;
  • hydrogen peroxide + UV radiation.

Each method has its own specific features.

Steam treatment is an accessible and effective method of disinfecting packaging, providing a high degree of cleanliness and antiseptic effect. However, condensation forms after treating the bottles with saturated steam, and it needs to be eliminated as it can deteriorate the results. Superheated steam and hot dry air are less effective compared to saturated steam, so they are used less frequently.

Cold disinfection is the most complex method of industrial sterilization for bottles. It involves treating plastic bottles with gamma rays, which requires additional equipment. Radioactive isotopes of cesium and cobalt are used as a source of radiation. Purchasing such installations is not always cost-effective, especially for small-scale production, so more accessible disinfection methods are commonly used.

Hydrogen peroxide + UV rays is one of the most effective methods for treating plastic packaging. Ultraviolet disinfection enhances the antiseptic properties of hydrogen peroxide. Ultraviolet light prevents the formation of oxidants, which also contributes to improved effectiveness. Treatment of bottles is carried out using high-intensity or short-wavelength radiation.

PET bottles cleaning

Disinfecting Plastic Bottles at Home

Bottles have long been used as reusable containers for various products in households. Just like in the case of their use in the food industry, they need to be thoroughly cleaned before use.

In home settings, the usual method is washing with detergent. Bottles used for water can be washed to remove residues of different products such as milk, juice, and other beverages. However, washing alone is one of the least effective methods of disinfection. It is not capable of eliminating pathogens as effectively as industrial treatment methods.

Despite the fact that plastic bottles are easily washable and can be disinfected, it is important to understand that they have a limited lifespan. Therefore, food production companies usually order new packaging for their products. We can assist with this matter. You can order bottle molds and plastic bottle caps from us. We offer convenient and favorable ordering conditions to our clients.

Advantages of «Preform Factory»

Our company specializes in manufacturing special preforms for producing plastic bottles of any capacity. Both large and small businesses can order PET preforms from us, and we provide comfortable and beneficial conditions for every client:

  • We handle the preparation of raw materials for preforms and caps ourselves, following technological standards, and can guarantee the quality of the products;
  • Customized design options are available for preform manufacturing;
  • We offer technological support throughout our collaboration.

Our factory is equipped with high-performance modern equipment, allowing us to produce batches of products in the desired quantities within short timeframes.