Comparison between wrap-around and shrink films

I.   Comparison between wrap-around and shrink films

There is a lot of overlap between the application areas of wrap-around films and shrink films, especially in the area of integrated packaging such as palletising, where both wrap-around and shrink packaging are often used. Wrap-around and shrink packaging have many common advantages, such as: non-toxic, odourless, hygienic, reliable binding of goods, reduction of collapses and breakages during storage and transport (maximum tilt angle of the goods can reach up to 45° when wrapped in wrap-around film), etc. Compared with wrap-around film, shrink packaging can be used in a variety of ways.

Compared with heat-shrink packaging, wrap-around film has many outstanding advantages in integrated packaging.

1. Advantages of wrap-around film

(1) Less film is used, which is conducive to the reduction of packaging cost.

Winding film before stretching, usually thickness of about 0.02mm, after stretching package, the thickness is even lower (below 0.02mm); and integrated packaging with heat shrink film, shrinkage before the thickness of 0.045mm or so, shrinkage packaging, the thickness of about 0.055mm, so even though the film partially overlap the wrapping packaging, but the amount of packaging film consumption is still significantly less than the use of heat shrink packaging, is expected to save 1/3 of the film consumption, and is expected to save 1/3 of the film consumption, and is conducive to reducing packaging costs. It is expected to save about 1/3 of the film consumption.

(2) Wrap-around packaging does not need to be heated, saving significant energy.

Regardless of whether to take the mechanical winding packaging or manual winding packaging, are at room temperature using the winding film stretching, wrapping to complete the packaging of goods, while shrink packaging must be heated, so that the film shrinks at higher temperatures to complete the packaging of goods, the use of winding film packaging, energy consumption is only about 1/20 of the contraction of the packaging, and because of the winding packaging does not need to be heated, the production of good security, the heat-sensitive commodities using the winding packaging, energy saving is significant. It is more favourable for heat-sensitive commodities to use winding packaging than heat shrinkage packaging.

(3)Convenient to use

No need or only use simple packaging device, that can complete the winding packaging, which is also in the household refrigerator film, pasture packaging has been widely used for important reasons.

This is also an important reason why it is widely used in household refrigerator film and pasture packaging. Based on the above reasons, the application of wrap-around film in integrated packaging has been developing rapidly in recent years, and wrap-around packaging has been used as a large number of alternatives to heat-shrinkable packaging in the integrated packaging of commodities.

2. Advantages of Heat Shrinkable Film

(1) Heat shrink film can get better sealing effect

When using heat shrinkable film packaging with very small holes, in the process of heat shrinkage, microporous due to film contraction and occlusion, the formation of the packaging and the atmosphere completely isolated from the sole space, not only has a good dustproof, but also compared to the winding packaging has a very good moisture resistance.

(2) Heat shrink packaging has a better appearance.

Used for sales packaging has a better promotional role, so commonly used in daily life with the packaging of small commodities, the appearance of this packaging, winding film is more inferior, in addition to fresh vegetables, food and other few commodities, the sales of commodities packaging is generally used in the heat-shrinkable packaging and not the use of winding film packaging.

(3) Heat shrink film can be used for bottle labels

Shrinkage and printing effect of the comprehensive balance, so that it has been widely used in bottle labels, not only can simplify the printing process of bottles, and decorative effect is outstanding, welcomed by users. In conclusion, although there are many common fields in the application of wrap-around film and heat-shrinkable film, as two completely different kinds of film, they are not the same.

Although there are many common fields of application, as two completely different plastic packaging materials, have their own unique characteristics and living space, are two kinds of competition, complement each other's plastic packaging materials, will be a kind of material in the near future will completely replace another kind of material that is not in line with the objective facts. In fact, many of the production of winding film enterprises, but also the production of heat shrink film.

Nanjing Suminoe Precision Machinery Co., Ltd. has professional cast film production line, the company's main cast film manufacturing production line: TPU hot melt adhesive film production line, CPP/CPE cast film production line, EVA solar encapsulation adhesive film production line, PE sanitary breathable film production line, PVDF cast film production line, PP 3D film production line, medical blood purification film production line, multi-layer co-extruded film production line, LLDPE winding film production line production line, LLDPE winding film production line and so on.

Translated with DeepL.com (free version)