Polyethylene sleeve: characteristics, application
The most common types of packaging are made of polyethylene film. From it make and popular packages-T-shirts, and materials for wrapping products. However, in terms of convenience, the best option is the bag-sleeve. Its advantages include the possibility of using material of different lengths. That is, in some way, the user himself can vary the packaging parameters. At the same time, the polyethylene sleeve retains all the advantages of classic packages, which include strength, ease of handling and tightness.
Where is the polyethylene sleeve used?
The film is the basis for further production of bags. Therefore, it can be called universal. The hose can act as an expendable material in the construction sector, in providing catering enterprises, as well as in households. As a rule, the polyethylene hose for packing is used where it is supposed to work with large volumes of a product or product. For example, for packing loose materials. Absence of pronounced seams and perforations allows organizing automatic packing lines, which do not require the connection of operators.
The film is applied in the form of a sleeve and in specialized spheres. So, there is polyethylene, originally designed for use in electrical needs. With the help of such a package, you can isolate devices and devices, protect them from moisture. A polyethylene sleeve for seedlings is also common, to which high demands are made in terms of ecological purity.
Again, polyethylene is initially a raw material for making bags with handles and other specialized or household containers. The hose, in turn, is a derivative of the general process for the production of film material. For its production, plastic granules are used with certain quality characteristics. In the melting process, a polyethylene sleeve is formed for packaging in the form of a film. In the future, manufacturers can divide the roll into pieces, creating a semi-finished product for a complete package with handles.
In order to increase the strength, manufacturers also add special additives, plasticizers and modifiers to the primary composition. As a result, the polyethylene sleeve acquires enhanced tensile strength. Also, the manufacturing process may include printing and creating rebate inserts. But such operations, as a rule, are carried out under special orders.
The length of the package is usually not fixed - the sleeve is released in its entirety. As for the width, the most common formats are 20, 30 and 40 cm, although depending on the capabilities of the equipment, this corridor of sizes can increase. In thickness, most films fit within a range of 30-200 μm. Despite the fine structure, the polyethylene sleeve can withstand heavy loads - several tens of kilograms. It is noteworthy that materials made from recycled polyethylene have thicker layers, which also causes high strength characteristics.
Operational properties of the film
As already noted, the technical characteristics of polyethylene are determined to a large extent by additives that are introduced in the manufacturing process. In particular, sliding modifiers give the material a lower coefficient of friction. This simplifies the opening of the sleeve, gives the film a specific shine, but at the same time eliminates the static effect. Anti-blocking additives are also used to prevent the internal walls of the material from sticking together. With this addition, the film not only eliminates the sticking effect, but also acquires the roughness of the surfaces. The means of providing external protection are also widespread, with which polyethylene film is added. The sleeve, in the processing of which fire retardant was used, for example, is resistant to fire. The principle of fire suppression is realized through the introduction of silicate layered composites, which form the carbonaceous layer. As a result, a refractory barrier is formed, which also prevents the release of volatile products during combustion.
Cost of material
Typically, manufacturers form prices individually, focusing on the parameters of a particular order. The cost is affected by the dimensions of the web, and the thickness, as well as the performance properties that the polyethylene film is endowed with. The price of rolls with a width of 15 to 150 cm on average is 180-200 rubles per 1 kg. The thickness can vary from 40 to 120 μm. More thick film can increase the price by another 50 rubles. per kilogram, but here too much depends on the volume of the order.
Small-format products are also distributed in the form of sleeves with a width of 6 to 15 cm. With the help of such a film, small packing bags can be formed in catering establishments. However, there are many industrial enterprises where small-format polyethylene film is used. The price in this case is already 250-300 rubles per 1 kg. The increase in cost is due to the complexity of the process of making coils with a small width.
Using a practical material made of polyethylene, it is possible to provide mechanical protection of the product, and protect it from the effects of high temperatures and humidity. At the same time, technologists strive to obtain new performance qualities of the material due to improved modifiers. In particular, if you plan to use a polyethylene sleeve in places exposed to sunlight, you should pay attention to the content of the structure of light stabilizers. So, if the film is purchased to cover the greenhouse, then the open sun will not harm the heat-resistant coating. Conversely, in order to maintain elasticity and strength under low temperature conditions, a film containing frost-resistant additives should be used.