What are the characteristics of vacuum packaging bags?

Plastic vacuum bags, categorized by the number of layers in the plastic film, can be divided into two main types: single-layer and multi-layer vacuum bags. The细分 can include one, two, three, four, and even up to ten or more layers. These bags are extensively used in both shipping and retail packaging. So, how do we ultimately choose the right plastic vacuum bags? Today's packaging bag recommendation highlights the key selection factors.

1. The puncture resistance of vacuum-sealed plastic bags. Whether for shipping or retail packaging, one of the crucial roles of packaging bags is to preserve food. If most are punctured, they fail to fulfill this function. Therefore, we need to understand if our products contain sharp or hard substances and at what level they can be pierced. The standard method involves having the packaging manufacturer provide samples, then conducting vacuum-sealed packaging tests, followed by tossing, dropping, and compressing them to observe for any leakage.

2. Applications of vacuum bags in various environments, including processing, storage, and transportation. Different environments require the selection of different plastic films and printing processes. For instance, vacuum-packed instant braised duck feet require high-temperature sterilization and boiling sterilization, which have different material requirements for the packaging bags. High-temperature sterilization demands plastic films that can withstand temperatures above 121°C, while boiling sterilization requires films that can withstand 100°C and remain non-soluble in high-temperature conditions, with strong water resistance.

3. Other requirements for maintaining food. The use of vacuum bags for food selection is to extend shelf life and better preserve its color, aroma, and taste. In addition to being puncture-resistant, there are many other functional requirements. For example, salt baked chicken legs and salt baked chicken wings will have oil and aromatic molecules. The plastic bags must have oil resistance and fragrance retention properties.