Heat shrinkable film is used for the sales and transportation of various products. Its main function is to stabilize, cover and protect products. The shrink film must have high puncture resistance, good shrinkage and certain shrinkage stress. During the shrinkage process, the film cannot produce holes. Since the shrink film is often suitable for outdoor use, UV anti ultraviolet agents need to be added.
Type of heat shrinkable film
1. Pet shrink film
Pet heat shrinkable film is a new type of heat shrinkable packaging material. Because it is easy to recycle, non-toxic, tasteless, good mechanical properties, especially in line with environmental protection, pet has become an ideal substitute to replace polyvinyl chloride (PVC) heat shrinkable film in developed countries.
2. Ops shrink film
Ops (heat shrinkable film) is a new type of body fitted packaging material that meets the requirements of environmental protection. OPS heat shrinkable film has high strength, high rigidity, stable shape, and good gloss and transparency. It has the advantages of convenient processing, easy coloring, good printing performance and high printing resolution. It is a material progress for the trademark that constantly pursues exquisite printing.
3. POF shrink film
POF has the characteristics of high surface gloss, good toughness, high tear strength, uniform heat shrinkage and suitable for automatic high-speed packaging. It is a replacement product of traditional PVC heat shrinkable film. POF means heat shrinkable film. POF is fully known as multi-layer coextrusion polyolefin heat shrinkable film. It is made by plasticizing and extruding linear low-density polyethylene as the intermediate layer (LLDPE) and co polypropylene (PP) as the inner and outer layers through three extruders, and then processed by special processes such as die forming and film bubble inflation.
4. PE shrink film
PE polyethylene, which is a transparent thermoplastic. There are three common types of PE: LDPE, HDPE, LLDPE. The monomers of the three kinds of polyethylene are the same, but the process conditions used in the synthesis of these polyethylene are different. Therefore, three different polyethylene varieties are generated, and the properties of the three materials are quite different.
Application of heat shrinkable film
Heat shrinkable film is widely used in the outer packaging of various products, such as food, medicine, sterilized tableware, sporting goods, craft gifts, printing materials, hardware and plastic products, telephones, electronic appliances, etc., especially in the combined (cluster) packaging of irregular objects or commodities, which can not only meet the functions of moisture-proof and dust-proof, anti touch and sneak exchange, transparent display, etc, The shrink film (bag) can be processed into: flat bag, arc bag, trapezoidal bag, three-dimensional bag and other special-shaped bags.
Application scope of heat shrinkable film
The heat shrinkable packaging machine uses far-infrared radiation to directly heat various specifications of films. The products are transported to the shrinkable furnace through the conveyor belt. The products are loaded with shrinkable packaging film, sealed and enter the shrinkable packaging machine, and the products shrink automatically. The power consumption of the heat shrinkable packaging machine is small, and the average power consumption per hour is only 2.1kw, so as to achieve perfect shrinkable packaging effect, which will never affect the packaging materials and electronic stepless speed change, The solid-state voltage regulator controls the temperature, which is stable and reliable. It is used for heat shrinkage of food, beverage, candy, cultural goods, hardware tools, daily necessities, chemical products and so on.
