What is the difference between a wound film and a stretch film?

What is the difference between a wound film and a stretch film?: Do you think the stretched film is similar to the stretched film, but it is actually different? Next, Hefei stretch film will take you to understand.

Do you think the wound film is similar to the stretched film, but it is actually different,Next, let me take you to understand it.

Stretch film and wound film are used to package various products for sale and transportation, and to protect the solid cover. These two names refer to the same thing. The concept of winding film is more extensive. The winding film is also called stretch film. Some wrapped films can be stretched. Some winding films cannot be stretched, or the stretching rate is low, so the stretched film belongs to the winding film.

Stretched films are also called stretched films and heat-shrinkable films. The earliest use of PVC as a substrate in China and doa as a plasticizer to produce PVC winding film. However, its cost is high. Pe stretch film first uses eva as a self-adhesive material with taste. After that, both pibv and ldpe are self-adhesive materials. The substrate is now dominated by lldpe, including c4, c6, c8 and metal pempe.

From single layer to second layer and third layer, lldpe stretched film is mainly made by casting method. Early lldpe stretched film is mostly blown film. This is because the production of delay lines has the advantages of thinness, uniformity and high transparency, and can be applied to high pre-drawing requirements. Since single-layer delay cannot do unilateral adhesion, the application field is limited. Single-layer and double-layer delays have no three-layer delay in data selection, and the formula interest rate is also higher. Therefore, the three-layer co-extruded structure is ideal. High-quality stretched film should have the characteristics of high transparency, high vertical elongation, high yield point, high transverse tear strength and good puncture performance.

Stretch film can not only meet the functions of moisture and dust prevention, touch theft, transparent display, etc., but also increase the appearance of the product. It can also replace various carton boxes, which not only saves packaging costs, but also meets the packaging trend. Winding film is widely used in the packaging of various products such as food, medicine, sterilized tableware, sports and physical products, craft gifts, printed matter, hardware and plastic products, telephones, electronic appliances and so on.

Principle of use

       1. The suitable thickness of the stretched film is 15 to 20 microns; pallet mechanical packaging This is one of the most common and widest forms of mechanical packaging. The pallet or film rotates around the pallet. The stretched film can be fixed on the bracket and move up and down. The packaging capacity is very large, about 15 to 18 tablets per hour.

       2. The appropriate thickness of the film is about 15 to 25 microns; horizontal mechanical packaging is different from other packaging. It stretches from stretched film all the way to articles and is suitable for long goods packaging such as carpets, plates, fiberboards and special shaped materials.

  3. It is suitable for manual packaging with a thickness of 17 to 35 μm, which is the simplest packaging. The tension film is installed on the frame or held by hand, and is rotated by the tray or the tension film around the tray. It is mainly used for damaged repackaging after packaging pallets, as well as ordinary pallet packaging.

       The above is the relevant knowledge about stretched film, if you want to know more, please come to consult.