Do you know how the hand stretch film is used in various industries? Let us take a look now!

Packaging of stretch film paper tube

This is one of the newer uses of stretch film, which is better than the old paper tube packaging. The suitable film thickness is 17～20μm;

Packaging of small items with stretch film

This is a newer packaging form of stretch film, which can not only reduce material consumption, but also reduce the storage space of pallets. In foreign countries, this kind of packaging was first introduced in 1984, and only one year later, it appeared on the market. Many such packaging, this packaging form has great potential. Suitable for film thickness 15～30μm;

Packaging of stretch film tubes and cables

This is an example of the application of stretch film in a special field. The packaging equipment is installed at the end of the production line. The fully automatic stretch film can not only replace the tape to bind the material, but also play a protective role. The applicable thickness is 15-30μm.

Stretching form of wrapping film tray mechanism

The packaging of stretch film must be stretched. The stretching forms of pallet mechanical packaging include direct stretch and pre-stretch. There are two types of pre-stretching, one is roll pre-stretching and the other is electric stretching.

Direct stretching is to complete the stretching between the tray and the film. This method has a low stretching ratio (about 15% to 20%). If the stretching ratio exceeds 55% to 60%, which exceeds the original yield point of the film, the film width is reduced, and the puncture performance is also lost. Easy to break. And at 60% stretch rate, the pulling force is still very large, for light goods, it is likely to deform the goods.

The pre-stretching is done by two rollers. The two rollers of the roller pre-stretching are connected together by a gear unit. The stretching ratio can be different according to the gear ratio. The pulling force is generated by the turntable. Since the stretching is generated in a short distance, the friction between the roller and the film It is also large, so the film width does not shrink, and the original puncture performance of the film is maintained. No stretching occurs during actual winding, which reduces the breakage caused by sharp edges or corners. This pre-stretching can increase the stretching ratio to 110%.

The stretching mechanism of electric pre-stretching is the same as that of roll pre-stretching. The difference is that the two rolls are driven by electricity, and the stretching is completely independent of the rotation of the tray. Therefore, it is more adaptable, suitable for light, heavy and irregular goods. Due to the low tension during packaging, the pre-stretching ratio of this method is as high as 300%, which greatly saves materials and reduces costs. Suitable for film thickness of 15-24μm.