Research and Application of Upright Bag Food Packaging Technology
2021-05-21 15:24:55
As early as 40 years ago, France’s Doyen Company developed a new package called Doypak, which has now evolved into a Stand-uppouch (SP) that is widely used in the US food market. Nowadays, most of the food, beverage and frozen food flexible packaging that can be sterilized by high temperature, transported and stored at room temperature, and frozen foods are all packaged in stand-up pouches and used as packaging containers for new products. Previously, due to the complicated structure and high price of the stand-up pouch packaging, it could not become mainstream food packaging to participate in the market competition. However, in the past decade, as the circulators of goods have made full use of the differentiated demands of the market, they have promoted the use of stand-up pouches in food, and stand-up pouch packaging and its related equipment have almost risen in the world market.
The structure of the stand-up pouches The stand-up pouches have a flat bottom, which is a flexible packaging container that can be placed vertically on the market shelf. The structure of the bottom of the container is relatively complicated, and the panel material is adhered to the body of the container. A part of the flexible front film becomes a W-shaped reinforcement material, and the rear panel sheet is folded back and forms an elliptical bottom. The structure of the bottom of the stand-up pouch package is generally good. However, the stand-up pouches have good flowability and protection performance, but the display of goods is poor.
The structure of the stand-up pouch looks simple, but the design and production of this structure is complex. Due to factors such as gravity and nonuniform configuration of the contents, the use of a single-layer plastic film or a multi-layer structure of the trunk portion can easily cause structural "fatigue." In order to make the side walls strong, aluminum foil and thick plastic materials can be used to make bags that can stand upright, and single-layer films are also used. However, single-layer upright bags are basically made of a thicker inner layer that has a sealing function. Olefin multilayer structure.
Device and Container Material Molding Bag/Fill/Seal Device: The shape of the end face of most stand-up pouches seen in the transverse direction is triangular. Basically, the formed bag is basically used, and the conversion device is used to open the upper part of the bag and form the bag. The maximum bag making speed is 720 bags/minute, which is generally 360 bags/minute. Between the two sides of the standing pouches, heat sealing is used to form a reinforcing relationship. The formed semi-finished bags are shipped to food or beverage companies for use in mechanically packaged foods.
Forming/filling/seal devices: Most form/fill/seal devices are horizontal, starting with the laminated structural material of the roll stock. The liquid material packaging production speed is about 200 bags/minute, and the maximum can reach 300 bags/minute.
Bags: There are many types of structures for standing upright pouches, such as bottle-shaped and glove-shaped stand-up pouches. Although more materials are used, they are popular with retail stores and markets because of their attractiveness to consumers.
Accessories: Standing pouches are accompanied by nozzles, easy-opening structures, and re-sealed zippers, which are distinctive and distinct from other products. These accessories are rare when making stand-up pouches and are suitable for F/F/S devices (F/F/S, forming/filling/seal devices). Extruded nozzles are beneficial for sealing tightness at the top corners and at the center, which is also a challenge for packaging machinery technicians.
The packaging styles such as stand-up pouches and pillow-type packaging machines with re-sealing zippers and box-in-boxes are differentiated and competitive, and can be assembled on bag-making machines and F/F/S for easy use.
Due to the continuous expansion of the upright bag market, it is now mainly how to professionally classify production and suppliers.
When oxygen barrier is formed for transparent combination, EVOH material will be affected by oxygen and moisture, as well as the toughness and strength problem of using silica (silica) coating.
Upright pouches for foods packed in stand-up pouches are used to package hard baked products such as biscuits, and product lumps are formed from biscuits on reinforced sidewalls and inner surfaces and on a solid flat bottom, gable top seals. Because it is flat and weak, it requires a folded structure to reinforce it.
Drink:
The beverage product packaged with this registered trademark of CapriSun is manufactured by WildFlavols. In the United States is a new packaging system developed by the famous Kraft Food company to market such beverage products. The series began to appear in Europe in 1969, and then crossed the ocean very popular in the United States in the form of children's food/packaging products. 5-6 years ago began to participate in the market of pillow-type aseptic packaging, with hot filling upright bags and sterile paper container packaging products, the results of a major reversal of the market.
There are three different forms of stand-up pouches involved in this market competition: (1) hot-filled stand-up pouch packs made of aluminum compound and transparent film plus aluminum foil composites; (2) can have attached zipper fittings after opening once Sealing box accessories stand upright bag with screw caps and stand-up pouches with zipper accessories; (3) Stand-up pouches with drinking straws and sealing tabs (wings).
The upright bag packaging used for beverage products and other juice flavored beverage products uses the transparent packaging film EVOH, a barrier material, to continuously expand the colorfulness of the product packaging to achieve the purpose of pleasing children, thereby constituting Most of the end customers' unconfirmed consumer groups.
Dry foods:
Compared with liquid products, the technical problems of microbial spoilage and prevention of chemical spoilage of dried foods are much less, so with the successful use of stand-up pouch packaging, stand-up pouch packaging has gradually been extended to the field of dried foods. One of the most pressing issues for packaging of crackers, soda crackers, salty fast foods, chocolate, sugar, and confectionery products is the barrier to moisture problems. However, if used in combination with moisture-blocking materials, the shelf life of such dried foods can be greatly improved. This is a result of research by packaging and technical workers.
For this reason, only a few nuts and ready-to-flavored products were originally packaged in stand-up pouches, but in the field of various baked products and fast-food products, stand-up pouches have also been widely used, further expanding the use of upright pouches and packaging. market.
Other new products:
Chilled soups and sauces, dry products such as dried boxes, dishes, and blueberries, pets (cats and dogs), fast foods, salad tops, and delicate frozen foods, such as French oils with chocolate Potato chips and other foods that are difficult to use stand-up pouches have also solved technical difficulties and have adopted stand-up pouch packaging to participate in the huge food market.
Utilizes polyester (PE)/Linear Low Density Polyethylene (LLDPE) composites with excellent protection of the contents, together with zippered closures and re-sealable covers, a variety of novel stand-up pouches New varieties gradually gained favor from the market and began to be listed for consumer sales.
The use of upright bag packaging for stand-up pouch packaging for aseptically soft-packed foods at room temperature has a variety of uses. It is used in soft-packed foods that have been sterilized at high temperatures and autoclaves (commonly known as soft canned foods that can be stored and distributed at room temperature). The use is most interesting. At the beginning of this century, many companies that produced tuna and pet food began to develop and research flexible packaging products that could create new value. In addition to canned food, the effect and impact of flexible packaging is undoubtedly the largest.
The high-temperature sterilization of soft-packaged foods on the surface is to reduce the heating required for sterilization and subsequent circulation and storage at room temperature, thereby expanding the use and application of traditional flexible packaging foods. In fact, the key to flexible packaged foods is to ensure the tightness of flexible packaging bags, the convenience of opening, the high sterilization temperature conditions and the pressure resistance of soft bags, and the barrier conditions of oxygen blocking and air blocking of flexible packaging materials. The most important factor of change is the completeness of the seal. The completeness of the upright pouch flexible packaging has now met the strict regulations and restrictions of government regulations and the commitment and guarantee of the related packaging industry. This is the technical basis and guarantee for the significant market progress of the upright pouch flexible packaging.
Foods packaged in flexible pouches include tuna, salmon, chicken breast, pet food, smoked fish, rice, and soup products. As described above, stand-up pouch foods have advantages in terms of product quality, display shelf life, and economy of products. Therefore, if you change the existing foods into stand-up pouches, you can expect research and development. A new generation of food that can be stored and circulated at room temperature to adapt to the new era.
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