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September 16, 2019

Stretch Wrapping Film Knowledge You Want To Know

Stretch wrapping film knowledge you want to know


Using the Wrapping Film for product packaging, the price of plastic packaging film can effectively reduce the cost of use. stretch wrap 18 x 1500 The wrapping film wrapped with plastic is only about 15% of the original wooden box packaging, about 35% of the heat shrinkable film, and about 50% of the carton packaging. . At the same time, it can reduce the labor intensity of workers, improve packaging efficiency and packaging grade. Stretch film is divided into mechanical film and artificial film. The stretched form of plastic packaging film of tray mechanical packaging (also called machine stretch film and clear stretch film) has direct stretching and pre-stretching.

1. The stretched film shrinks too much during the stretching process and does not reach the required width of the product;

2. The stretch film is too hot to retract during the secondary compounding process, which exceeds the standard requirements and does not reach the required width of the product. The material of the stretched film is an amorphous polymer which, when subjected to a tensile force greater than the yield strength in a certain temperature range, produces plastic elongation deformation, and polymer structural units (segments, macromolecules and crystallites) during the deformation process. Orientation begins due to stretching. As the degree of orientation increases, the force between the macromolecules increases, causing the viscosity of the polymer to increase and tend to harden, and the deformation tends to be stable and no longer develops. This phenomenon is called "stress hardening".

The stretch wrapping film is a kind of packaging method which is produced by mechanical stretching device or manual stretching of the film at normal temperature, and is wrapped in a convenient transportation and storage. It is a very popular international one. package style. Imported resin and advanced flow-through film extrusion production process. It has good tensile properties, tear resistance, strong penetration resistance, high transparency, good self-adhesiveness and high retraction rate, tight packaging and no looseness. Can be widely used in chemical raw materials, fertilizers, food, mechanical and electrical products, textile products, and Other single-piece or tray packaging and other strapping packaging. In today's society, the part of the article is packaging and in the packaging industry, stretch film is widely used, and the field is getting wider and wider! Stretch film is widely used in cargo Pallet packaging, such as electronics, building materials, chemicals, metal products, auto parts, wire and cable, daily necessities, food, paper and other industries.



With the increasing demand for stretch-wound films, the output of stretch-wound film manufacturers is also increasing, and what are the reasons for the application of stretch-wound films? It can be used to package goods, the binding is very tight and strong, and it can replace all kinds of paper boxes. For the shape-shaped articles with small irregular shapes and the combined packaging of goods, the advantage of stretch wrapping film is even greater, which can save packaging. The cost can also meet the trend of packaging. The stretch wrap film can be closely attached to the product, and the plastic wrap film manufacturer can have transparency, beautiful appearance, clean and bright, and is suitable for packaging various shapes of goods, thereby increasing the attractiveness of the product appearance. The products packaged in stretch wrap are also very clean, very hygienic and clean, and the sealed package is also dust and moisture resistant.


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