In the packaging industry, the barrier properties of Pet bottle preform play a key role in ensuring the quality and shelf life of the packaging contents, and in-depth analysis of its matching with packaging application requirements is of great significance.
First of all, Pet bottle preform has certain basic barrier properties. It can provide a certain degree of barrier to gases such as oxygen, carbon dioxide, and moisture. For some products that are not very sensitive to gas and moisture, such as ordinary daily necessities or certain sauces, this basic barrier performance can basically meet the requirements. For example, when packaging some solid seasonings, Pet bottle preform can prevent the invasion of a small amount of external moisture and air, keep the seasoning dry and the flavor stable for a certain period of time, and will not deteriorate due to short-term gas and moisture exchange.
However, for some products with high requirements for barrier properties, such as food, beverages and medicines, a simple Pet bottle preform may not be able to fully meet the needs. In food packaging, fried foods such as potato chips are easily oxidized and damp due to the entry of oxygen and moisture, and lose their crisp taste; juice drinks will lose their bubble feeling due to the escape of carbon dioxide, and the entry of oxygen will also accelerate deterioration. For medicines, especially some medicines that are sensitive to moisture and oxygen, such as some biological preparations and traditional Chinese medicine preparations, higher barrier properties are required to ensure their efficacy and stability. At this time, the Pet bottle preform often needs to be further processed or compounded with other materials. For example, by using multi-layer co-extrusion technology, barrier material layers such as ethylene-vinyl alcohol copolymer (EVOH) are added to the Pet bottle preform to significantly improve the barrier capacity to oxygen and moisture to meet the packaging requirements of food and medicine.
In the field of cosmetic packaging, some high-end cosmetics contain ingredients that are easily oxidized or volatile, such as vitamin C, essential oils, etc. The barrier properties of the Pet bottle preform need to match the characteristics of these ingredients. If the barrier property is insufficient, the active ingredients will be lost quickly, affecting the efficacy and quality of the cosmetics. Through special surface coating treatment or the use of high-barrier Pet bottle preform variants, the shelf life of cosmetics can be effectively extended to maintain their efficacy and aroma.
Finally, from the perspective of market and cost, the matching of the barrier properties of the Pet bottle preform with the packaging application requirements also needs to consider economics. For general products produced on a large scale, excessive barrier performance may lead to unnecessary cost increases. Therefore, it is necessary to select a Pet bottle preform or treatment method with appropriate barrier performance to achieve a balance between cost and benefit while meeting the basic shelf life and quality requirements of the product. For example, for some beverages that are sold in the short term and are not very sensitive to quality changes, ordinary Pet bottle preform packaging can be used, while for high-end or long-shelf products, Pet bottle preform with enhanced barrier treatment can be used, thereby ensuring product packaging quality while optimizing production costs and market competitiveness.
