Single crystal rock sugar is made of high-purity granulated sugar crystals, so it is crystal clear and full of particles, giving people a high-quality visual enjoyment. In order to maintain the original quality and taste of single crystal rock sugar, the packaging bag needs to have a certain degree of moisture resistance and sealing. In addition, the packaging bag of single crystal rock candy also needs to be beautiful and easy to carry, which is convenient for consumers to buy and eat.

In order to maintain the freshness and safety of food, single crystal crystal crystal sugar packaging bags usually use food-grade plastic materials, such as polyethylene (PE), polypropylene (PP) and so on. These materials can effectively prevent the penetration of moisture and oxygen, and keep the crystal sugar dry and taste. At the same time, these materials also have good heat resistance and impact resistance, which can effectively protect the rock candy from the external environment.

The packaging bag needs to have the right size and shape to hold the amount of rock sugar and be convenient for consumers to open and close. Secondly, the appearance design of the packaging bag should be consistent with the characteristics of single crystal rock candy, such as choosing transparent materials to highlight the crystal clear of rock candy; or using printing technology to display the image and brand information of rock candy on the packaging bag. In addition, the opening part of the packaging bag needs to be designed with a proper sealing method to ensure the long-term storage and edible safety of the crystal sugar.

Preservation function of single crystal rock sugar packaging bag. Since single crystal rock sugar is easy to absorb moisture, the packaging bag needs to have a certain moisture resistance. Common moisture-proof treatment methods include adding moisture-proof agents inside the packaging bag or using a double-layer packaging structure. In addition, the packaging bag also needs to have a certain degree of permeability to prevent the ice sugar from deteriorating due to excessive internal gas pressure. At the same time, the packaging bag should also have certain external protective properties, such as tear resistance, damage resistance, etc., to ensure that the crystal sugar is not damaged during transportation and storage.