Because of its functional and aesthetic benefits, flexible packaging has become increasingly popular in recent years, and this trend is only expected to continue.
It is made up 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.
They stand out from other materials due to their durability, malleability, and light weight
The fact that flexible packaging is environmentally friendly is yet another argument in its favor
They have a significantly more environmentally friendly reputation than plastic does, despite 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
Additionally, it is important to note that the production of flexible packaging requires a smaller amount of raw material
In addition to this, polyurethane adhesive film emphasizes the possibility of printing on the entirety of its surface, which, as a result, produces an original packaging that enables the brand as well as the product to stand out from the competition. In addition, they are secure packaging that is highly resistant to being handled and torn, airtight, hygienic, and excellent for use with liquid, granular, or powdered products. They are convenient to transport and store, and they lengthen the product's shelf life by shielding it from the effects of oxygen and light.
Adhesives made of polyurethane used in flexible packaging
Extrusion, lamination (the process of bonding sheets together with an adhesive), coating, and co-extrusion are all viable options for the production of flexible packaging. In addition to covering adhesives, sealants, and functional coatings, the regulations that pertain to flexible packaging that contains food also cover food itself.
The qualities that make polyurethane so effective as an adhesive
The curing time for polyurethane adhesive products is relatively short, in addition to their resistance to water and high temperatures. After they have reached their final state, the joint can no longer be undone or broken apart. They offer protection against corrosion, are exceptionally long-lasting, and enhance the appearance of the components on which they are used.
In the production of flexible packaging, polyurethane laminating adhesives are utilized. It is recommended to use them for applications that are going to be sterilized or that will spend a long time in ovens. Even packaging that contains aggressive chemicals can benefit from their use. They have a glossy appearance, a high initial tack, and very good wettability. Additionally, they have a high initial tack. Increased solids application and decreased solvent retention both contribute to increased productivity. Additionally, it can be utilized as a solvent-based adhesive for the purpose of laminating biodegradable films. It does not contain any solvents, has a high thermal resistance, and abides by all regulations in both the European Union and the United States.
What exactly is thermoplastic polyurethane (TPU), and what are some of its applications?
There are many different kinds of polyurethane, and one of them is called thermoplastic polyurethane, or TPU for short. It is a thermoplastic elastomer that can be processed by melting, and it possesses excellent flexibility, durability, and abrasion resistance. It is formed through the processes of injection molding, blow molding, and extrusion, just like other thermoplastics.
It is a material that has a wide range of applications and can be found in a variety of places, such as in furniture, automobiles (body parts, soundproofing padding, doors, floor mats, headrests, steering wheels, seats, etc.), footwear, adhesives, paints, elastic textile fibers, wheels, mobile phone casings, cable sheathing, sports equipment, machinery accessories and components, hoses, electrical parts, etc.
