If you are planning to buy a plastic package for your product, it would be a great idea to choose a plastic packaging roll film. The advantages of roll stock packaging films are numerous and are not limited to packaging products. You may also opt for a custom-made packaging that is tailored to your product. Here are a few examples of custom-made plastic packaging roll films:
The first step in the process is to prepare the film. Most films require surface preparation before printing. This process is known as activation and is the most common industrial use. It raises surface free energy values of the film. This energy will diminish over time, but will be present for printing on it. This process is known as corona activation. Once the film is ready, it can be used in printing processes like gravure or flexography.
Polyvinyl chloride, a very common type of film, has a shrink percentage of 40%. In contrast, polyvinylidene chloride is an excellent water vapor barrier, but cannot be extruded. It is commonly used as a coating on other plastic films, including polyvinyl chloride. Cold-sealed packaging films also feature a release coating. This coating helps unwind the packaging material easily, if necessary.
Apart from being cheaper than other decorating methods, plastic films can also give a 'no-label' look to transparent containers. Water and spirits bottles are popular cases where plastic films are being used. This type of packaging film also saves storage space when compared to paper. It can also be used to wrap the entire product, making it more versatile than paper. Its versatility is an important factor in choosing plastic packaging roll film.
It is important to note that these films also exhibit self-adhesion properties. As the film is wound on the roll, it sticks to itself, preventing it from dissolving and separating into multiple layers. However, this self-adhesion is inhibited by the addition of particulate additives. Particulate additives reduce surface-to-surface adhesion and minimize friction and slippage. Anti-blocking agents also reduce friction and reduce surface to surface adhesion.
Polyethylene films are produced by a process called extrusion. First, small plastic pellets are melted until they become liquid. Next, the melted plastic is forced through a circular die. This creates a tube of plastic. After this, a bubble is inflated with air and drawn up a tower. The bubble is then allowed to cool. The speed of pulling from the die determines how thick the film is. Also, the amount of air inserted into the bubble determines how thick the film is.