How to use ultrasonic welder machine in the food package sealing industry?

How to use ultrasonic welder machine in the food package sealing industry?

Packaging is the guarantee of product quality. This is especially true for the food industry, so the market needs creative packaging solutions to meet the high requirements of food packaging in terms of functional characteristics. These requirements include maximizing the shelf life of food, increasing the attractiveness of food appearance, facilitating unpacking, and improving food safety. Packaging is the guarantee of product quality. This is especially true for the food industry, so the market needs creative packaging solutions to meet the high requirements of food packaging in terms of functional characteristics. These requirements include maximizing the shelf life of food, increasing the attractiveness of food appearance, facilitating unpacking, and improving food safety. At present, the commonly used sealing technologies include high-frequency heat sealing, hot plate heat sealing, pulse heat sealing, infrared radiation heat sealing, and ultrasonic heat sealing. Among them, ultrasonic heat sealing is increasingly valued by people due to its advantages of short heat sealing time, high efficiency, cleanliness, and high heat sealing strength, and there is a trend of gradually replacing other heat sealing methods.

Here are some common applications of ultrasonic welding technology in the field of food packaging:

Shell, tea bag
Sealing of top cover film, welding of sealing rings and packaging sealing of filters are some of the most important applications solved by ultrasound. The welding mold keeps the film in place by vacuum. The mold does not need to be heated to ensure its durability and protect the product.

Spouts, Valves, Zippers
Ultrasound can be used to weld degassing valves or screw caps (spouts) and all types of films quickly and safely. Since ultrasound only causes the molecules of the sealing layer to vibrate, shrinkage of the film is avoided and the barrier properties are not affected. In addition, ultrasound can be used to safely integrate zippers into reclosable bags and to press zipper ends together (zipper pressing).

film packaging
Ultrasonic waves can safely separate the remaining product in the weld area, thereby ensuring an absolute seal. This significantly reduces the number of packaging leaks and enhances product durability. Herrmann Ultrasonic fully demonstrates this advantage in longitudinal continuous welding and transverse intermittent welding of stand-up bags, zipper bags and hose bags.
Beverage packaging
Ultrasonic welding is particularly suitable for coated cardboard packaging materials. Even though the product is wet, it can still ensure the sealing of the weld, whether it has an aluminum film or not does not matter. The spout can be integrated normally. The sealing time is short and the output is high. Repeatable welding parameters ensure consistent seal quality.

Covers, blisters, trays
Especially in PET applications, ultrasound can quickly reach high melting points and increase production. Blisters can be sealed and separated, and unsealing and authenticity anti-counterfeiting functions can also be easily achieved.
Ultrasonic sealing provides production possibilities for packaging materials with thermoplastic coatings, such as capsules, bags, beverage cartons, beverage cups and covers: even if there is filler remaining in the weld area, it can still ensure high-speed production and produce tight welds. With the help of ultrasonic technology, process optimization and product verification in food packaging can be easily achieved.