Explain the performance and transportation of shrink film.

Performance of shrink film and packaging application effect;

First, it can package goods of various shapes, and shrink-package goods of various shapes in the same shrink bag, which is convenient to carry;

Second, shrink packaging has good shock resistance, impact resistance and good protection performance;

Third, the appearance is beautiful, which can make the film close to the goods, so shrink packaging is a body-fitted packaging;

Fourth, the goods in shrink packaging are immobile, and the packaged goods will not stagger in the packaging;

5. Good transparency, allowing customers to directly observe the integrity of goods;

Six, shrink packaging is clean and dust-proof;

Principle of shrink film production The stable state of polymer chain tends to curl. When the polymer is in a high elastic state when heated and melted, the orientation of the polymer chain is stretched and straightened under the action of external force, and the orientation state of the polymer chain is frozen after rapid cooling reaches the glass transition temperature. When the temperature rises again, the polymer chain tends to be stable and curls, which is macroscopically manifested as contraction. According to its shrinkage principle, there is no chemical change, so it is called "physical reducibility". The shrink film made by blow molding is made by using the above principle and after two times of inflation and cooling.

Shrink film is a popular new packaging material, which has good transparency, good toughness, corrosion and low water vapor transmission. There is also an ideal shrinkage rate. When the film is subjected to a specific temperature, it automatically shrinks and tightly wraps the goods, thus protecting the goods, and also playing the roles of rust prevention, pollution prevention, injury prevention and theft prevention. Commodity storage stability, simple packaging technology and equipment, easy to realize automatic shrink packaging. Shrinkage film is used for the sale and transportation of various products, and its main function is to stabilize, cover and protect the products. Shrinkage film should have high puncture resistance, good shrinkage and specific shrinkage stress. In the process of shrinkage, the film cannot produce holes. Because shrink film is often suitable for outdoor use, it is necessary to add UV anti-ultraviolet agent.

The characteristics of shrink film are very obvious. At first, it has relatively high flexibility, is not easy to be damaged, and has relatively strong blasting resistance. At the same time, it also has corresponding impact resistance. It is precisely because of these characteristics that people use it to package the goods that have just been produced, in fact, it is a protective film for the goods, which protects the appearance of the goods from being damaged and enhances the impression in the eyes of customers.

Shrinkage film is widely used in the whole package of wine, cans, mineral water, various beverages, cloth and other products. PVC shrink film, adding ingredients to enhance its heat resistance, toughness, ductility and so on. The upper layer of this surface film is paint, the main component in the middle is PVC, and the lower layer is back-coated adhesive.

Shrinkage film was used in industrial packaging from the beginning of industrial production, and then it was used in food packaging, for example, PVDC casing film was used in sausage packaging. Shrinkage film uses the energy stored in the film when it is stretched longitudinally or transversely in a high elastic state, and uses the memory effect of thermoplastics on the shape before biaxial or unidirectional stretching to restore the shape before stretching when it meets heat again to achieve the packaging purpose.

Shrinkage film is mainly used in the sales and transportation of products, which is used to stabilize, cover and protect products, while plastic wrap film is mainly used to keep food fresh, which is the fundamental difference between the two. Shrinkage film can be used for insulating packaging of electrical appliances and electronic components (such as the outer packaging of dry batteries); Packaging of general goods and packaging of food contact. Using it as a packaging material can not only simplify the packaging process and reduce the packaging volume, but also be widely used in commodity packaging because the shrunk transparent film tightly wraps the packaged goods and can clearly show the color and shape of the goods.

Shrink film sleeve label is a new label printed on plastic film or plastic pipe, which mainly includes common shrink film types such as PE, PVC and PET, and has the following characteristics:

First, the shrink film sleeve is close to the goods, and the packaging is compact, and the shape of the goods can be displayed, so it is suitable for irregular goods that are difficult to package;

Second, the shrink film sleeve label can provide 360 multi-angle decoration for the packaging container, and can print the product description and other commodity information on the label, so that consumers can understand the performance of the product without opening the package;

Thirdly, the shrink film sleeve label is convenient to process, the packaging is sealed, pollution-proof and good in commodity protection;

Fourth, the printing of shrink film sleeve label belongs to the film printing, which can protect the imprint and the label can be better;

5. When labeling shrink-wrap labels, there is no need to use adhesive, and the same transparency as glass can be obtained.