Brief Introduction to Coffee Packaging
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As we all know, there are various forms of coffee on the market. From liquid coffee drinks, instant coffee powder, and ground coffee powder to roasted coffee beans, their properties are different, so the demand for packaging is also different. This article simply combs the common coffee packaging, hoping to help you.
Liquid coffee drinks are mostly instant drinks for consumers, so the display effect and portability of packaging are the primary consideration. In addition, it is necessary to avoid the damage of oxidation to coffee flavor, so the packaging needs a good oxygen barrier. Based on these requirements, cans are the most typical liquid coffee packaging. Most of the high-end liquid coffee drinks are packaged in glass bottles, which improves the product display effect while achieving an oxygen barrier, to reflect the product positioning.
In recent years, liquid coffee packaging in the form of paper the aluminum-plastic aseptic packaging has also appeared. This is a low-cost but efficient packaging form for cans. The paper aluminum-plastic composite aseptic package uses the aluminum foil in the middle layer to provide excellent barrier performance, and the paper on the outside provides good printing quality. With the high-speed aseptic packaging machine, it can achieve very high packaging speed. In addition, the square aseptic bag can also make full use of space, improve the number of contents per unit space, and help reduce transportation costs. Therefore, the aseptic bag has become a rapidly growing liquid coffee packaging.
Although coffee beans will expand due to CO2 gas during baking, their internal cell structure and skin membrane will still be preserved. This allows volatile, oxygen-sensitive flavor compounds to be tightly retained. Therefore, the packaging requirements for roasted coffee beans are not very high, only a certain barrier is required. In the past, roasted coffee beans were only packed in paper bags lined with waxed paper. In recent years, only PE-coated paper has been used to replace the lined wax-coated paper.
The requirements for packaging ground coffee powder are very different. This is mainly due to the destruction of the membrane and internal cell structure of coffee beans during the grinding process, and the flavor substances begin to escape. Therefore, the ground coffee powder must be tightly packed immediately to prevent it from going stale and degrading. In the past, vacuum metal cans were used to pack ground coffee powder. With the development of flexible packaging, heat sealable aluminum foil composite packaging has gradually become the mainstream packaging form of ground coffee powder. The typical structure is PET / / aluminum foil / / PE composite structure. The inner PE film provides heat sealing, the aluminum foil provides a barrier, and the outer pet protects the aluminum foil, which also serves as the printing substrate. When the requirements are low, the aluminized film can also be used to replace the middle aluminum foil. A one-way valve is also installed on the packaging bag so that the internal gas can be eliminated and the external air can be prevented from entering.
Instant coffee is made by extracting soluble ingredients from roasted coffee. Since less oily substances are removed, a small amount of coffee oil collected from ground coffee will be added to instant coffee. This oil is often oxidized into a film, resulting in a very high surface area of instant coffee and no caking. To preserve aromatic substances, N2 gas must be filled into the package to create an environment with O2 content of less than 2%. Therefore, instant coffee is often packaged with aluminum foil.
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