The development prospects of the liquid food packaging industry in China are highly promising. With the rapid economic growth, the purchasing power and consumer willingness of domestic residents have been steadily increasing, leading to a stronger focus on improving quality of life. As a result, the demand for liquid foods such as beverages, alcoholic drinks, edible oils, and seasonings is expected to grow continuously alongside rising living standards. In the long term, the liquid food industry—covering areas like beverages, alcohol, oils, and condiments—still holds significant potential for expansion. Particularly, the growing spending power in rural regions will play a key role in boosting consumption of liquid products, including soft drinks and other beverages.
Moreover, the rapid development of downstream industries and consumers’ increasing pursuit of high-quality products will drive companies to invest in advanced packaging equipment that meets production needs. This will also raise the demand for high-precision, intelligent, and high-speed packaging machinery. Consequently, the Chinese liquid food packaging machinery market is expected to offer broad and sustainable growth opportunities.
In terms of classification, liquid food packaging can be divided in various ways. Based on the production process, it is commonly categorized into plastic bags and composite bags. Depending on the raw materials used, these include high-pressure polyethylene (HDPE), low-pressure polyethylene (LDPE), polypropylene (PP), polyvinyl chloride (PVC), and more. By shape, they can be classified as vest bags, straight bags, three-dimensional bags, square bottom bags, pockets, plastic strips, or special-shaped bags.
Plastic bags come in two main types: woven bags and film bags. Woven bags are made from polypropylene or polyethylene and are known for their lightweight, high strength, and resistance to corrosion. When lined with a plastic film, they become moisture-proof and dust-proof. These bags vary in carrying capacity: light-duty bags can hold less than 2.5kg, medium ones between 25–50kg, and heavy ones between 50–100kg. Container bags, on the other hand, can carry over 1000kg. Woven bags are typically produced by extruding plastic films, cutting them into flat yarns, and weaving them using warp and weft threads. They are widely used for packaging fertilizers and chemical products.
Film bags, on the other hand, are made from polyethylene and are commonly used for daily packaging. While they offer convenience, they also pose environmental challenges due to their non-biodegradable nature. Like woven bags, they can be classified by material type and shape, with options ranging from simple flat bags to more complex designs.
Composite packaging bags combine different materials to enhance properties such as permeability, moisture resistance, oil resistance, water resistance, and chemical resistance. This makes them ideal for applications requiring protection against pests, dust, bacteria, light, and odors. They also offer better mechanical strength, heat and cold resistance, impact resistance, and good printing and decorative effects.
By form, composite packaging can be classified as three-sided sealed bags, yin-yang bags, middle-sealed bags, pillow-shaped bags, five-edge sealed bags, stand-up bags, zip-lock bags, straw bags, membranes, and cover materials. Functionally, they can be designed as high-vacuum bags, cooking film bags, anti-static film bags, antibacterial film bags, anti-fog film bags, vacuum-sealed bags, anti-chemical film bags, oxygen scavenging packaging, and modified atmosphere packaging. Material-wise, they may include laser-aluminized films, laser transfer paper, paper composites, aluminum composites, plastic composites, and textile composites.
Overall, the diversity and adaptability of liquid food packaging solutions ensure that they continue to meet evolving consumer and industrial demands.
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