Coffee packaging technology

Technical packaging of coffee

The packaging characteristics of coffee and tea also have many similarities, such as preventing aroma from escaping, preventing moisture absorption and so on. The refreshing and stimulating nature of coffee has made it one of the most popular pastimes in the world.

Packaging requirements for coffee

Coffee is divided into ordinary coffee (ground, roasted) and instant coffee made of spray, freeze-drying and so on. When packing ordinary coffee, we should pay attention to the following points.

The oil and aromatic components in antioxidant coffee are easy to oxidize when exposed to oxygen.

Moistureproof coffee will speed up the speed of dampness after it is exposed to moisture.

Gas-blocking ordinary coffee is prone to the loss of volatile aroma components, and is easily affected by peculiar smell. Therefore, when packaging ordinary coffee, we must avoid escaping aromatic gases from the packaging and absorbing odors from the outside world. Packaging materials must have a certain degree of gas barrier performance.

In the case of high temperature, it will accelerate the biochemical reaction and volatilization rate of coffee.

Instant coffee should also pay attention to moistureproof and anti-oxidation.

Packaging Technology of Coffee

At present, almost all ordinary coffee use air-tight vacuum packaging technology or inflatable packaging technology.

The vacuum packaging technology is to vacuum and seal the coffee after bagging, while the inflatable packaging technology is to vacuum and fill with other inert gases before sealing. The inflatable packaging of coffee is often filled with nitrogen or carbon dioxide. Both packaging technologies are aimed at removing oxygen. Therefore, the packaging materials must have a certain degree of air tightness and heat sealing performance. Vacuum and inflatable packaging technology can effectively prevent coffee from oxidation and moisture, and the fragrance preservation effect is better.

Selection of coffee packaging materials

The packaging materials of bagged coffee are mainly paper / cellophane and paper / hydrochloric acid rubber film, this structural material is mainly to isolate oxygen and prevent coffee oxidation, there are also polyester / aluminum foil / polyethylene, polyester / polyvinylidene chloride / polyethylene, polypropylene / polyvinylidene chloride / polyethylene and nylon / polyvinylidene chloride / polyethylene and so on. These materials are not only suitable for vacuum packaging, but also suitable for inflatable packaging. Polyester / aluminum foil / polyethylene composite material is used in the bag, and the inner polyethylene is heat-sealed, so high-density polyethylene should be used. Low-density polyethylene should not be used. Although low-density polyethylene has good heat-sealing performance, it will react with coffee oil and cause coffee deterioration.

Metal cans and glass cans are usually packed with vinyl plastic lids, which are easy to cover tightly after opening to prevent coffee from getting damp and losing its fragrance.

Instant coffee generally uses paper / aluminum foil / polyethylene packaging materials for soft packaging, which can achieve the effect of moisture-proof and oxygen insulation.

The packaging form of coffee

Ordinary coffee is usually bagged and canned, and bagged coffee usually uses vacuum and inflatable packaging technology. In addition, the sales packaging of some coffee is packed in inner packaging and bagged, and the outer packaging is packed in boxes. A boxed outer package can contain several to dozens of bags of coffee, the outer packaging is usually a carton structure, this structure packaging is easy to print, can protect the inner bagged coffee, and is easy to stack and display. Canned coffee is usually in the form of metal and glass cans, with a polyethylene plastic lid, and instant coffee is usually packaged in bags.