Some customization considerations for liquid flexible packaging bags

Data shows that by 2016, the total demand for liquid packaging paperboard will increase by approximately 560,000 tons. During this period, the demand for dairy products and juice packaging will account for 94% of the total shopping mall, and the size of the shopping mall will increase by US$220 million. The expansion of the liquid packaging market will bring a huge impact to the entire market. The packaging market brings huge development space. When it comes to liquid packaging, the first impression of the public is bottled. However, in recent years, liquid flexible packaging has been widely recognized for its unique advantages.

Liquid flexible packaging has many advantages such as strong barrier properties, no odor, strong fragrance retention, easy to carry, not easily broken when dropped, and no squeezing or collision during collection. It is currently widely used in dairy packaging, beer packaging, juice, home care solutions, Condiment packaging and other industries.

Self-standing zipper bag manufacturer: So what should you pay attention to when customizing liquid flexible packaging bags?

1. Choose the right material

Different materials should be used for different liquids.

For example, for liquids containing vegetable oil, do not use PE film as the inner layer material. Although the PE film has high transparency and good air permeability, its permeability is average. The PE film will penetrate and swell when it comes into contact with vegetable oil. Therefore, if liquids containing vegetable oil are filled with PE film , the shelf life of the liquid will be shortened.

2. Co-extruded PE film with more than five layers is safer

PE co-extruded film is a common material for liquid flexible packaging bags. Dairy products packaging and soy sauce packaging on the market are all PE co-extruded films. Ordinary PE co-extruded films can be divided into three layers and five layers. The barrier properties of five-layer co-extruded films Higher than three-layer co-extruded film. Therefore, for foods with higher safety factor, it is recommended to choose five-layer or more PE co-extruded film.

3. Use high viscosity adhesives

The higher the composite strength of the soft liquid packaging bag, the stronger the adhesive force, and the less likely it is to fall off. Moreover, after the composite material is processed into a bag, it is likely to be damaged when exposed to harsh environments or affected by moisture and chemical components. , so it is recommended to choose high viscosity glue. Although this will increase the cost to a certain extent, the benefits brought by it are relatively objective. In addition, it is also necessary to test and analyze the quality of the composite layer after the composite is completed, such as peeling off Experiment to ensure composite bags meet higher standards.

4. Aluminized film cannot replace metal aluminum foil

Taking into account the characteristics of the liquid, liquid flexible packaging has a layer of metal aluminum foil, which acts as a barrier. However, the aluminized film is highly flat, highly decorative, and has a certain barrier property. Therefore, some manufacturers have asked whether aluminized film can be used instead of metal aluminum foil. ,the answer is negative.

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