In recent years, flexible packaging has seen a rise in popularity as a result of the functional and aesthetic benefits it offers, and this trend is only expected to continue as it has been doing so far.
It is composed of one or more sheets of plastic, aluminum, cardboard, or paper that have been sealed and glued together using a variety of adhesives, the most prominent of which is polyurethane. It may also be made up of a combination of these materials.
They are distinguished from other types of materials by virtue of their resistance to wear and tear, malleability, and low density.
One more point in its favor is the fact that flexible packaging has a low impact on the surrounding natural environment.
In spite of the fact that there is still room for improvement in terms of their carbon footprint through the utilization of biopolymers, compostable materials, and recycled products such as polyurethane foam, they have a reputation that is significantly more environmentally friendly than plastic does.
In addition to this, Eva adhesive film is essential to emphasize the fact that the production of flexible packaging calls for a lower quantity of the raw materials.
In addition to this, polyurethane adhesive eva adhesive film highlights the possibility of printing on the entirety of its surface. This, in turn, produces an original packaging that enables both the brand and the product to stand out from the crowd of other similar offerings on the market. In addition, they are safe packaging that is exceptionally resistant to being handled and torn, airtight, hygienic, and work very well with liquids, powders, or granules of any kind. They are easy to transport and store, and they extend the product's shelf life by protecting it from the damaging effects of oxygen and light. Moreover, they are convenient to use.
Polyurethane adhesives that are utilized in the production of flexible packaging
The production of flexible packaging can be accomplished through a variety of processes, including extrusion, lamination (the process of bonding sheets together with an adhesive), coating, and co-extrusion. The regulations that pertain to flexible packaging that contains food cover not only the adhesives, sealants, and functional coatings, but they also cover the food itself. These regulations cover all of these things.
The characteristics of polyurethane that contribute to its efficiency as an adhesive
In addition to their resistance to water and high temperatures, polyurethane adhesive products also have a relatively quick curing time. Once they have reached their final state, the joint can no longer be undone or broken apart because it has reached its final state. They provide protection against corrosion, have an exceptionally long lifespan, and improve the overall appearance of the components on which they are used.
Laminating adhesives made of polyurethane are frequently used in the manufacturing of flexible packaging. It is recommended that you use them for applications that will be sterilized or that will spend a significant amount of time in ovens. Even packaging that houses potentially harmful chemicals can profit from their application. They have the appearance of being glossy, have a high initial tack, and are very good at being wet. In addition to this, they possess a strong initial tack. Productivity can be increased by increasing the amount of solids that are applied and decreasing the amount of solvent that is retained. Additionally, it can be utilized as an adhesive that is based on a solvent, and it can be used for the purpose of laminating films that are biodegradable. It is compliant with all of the regulations in both the European Union and the United States, and it does not include any solvents in its composition. It also has a high thermal resistance.
