Types of Heat Shrink Wrap

2023-12-29

Heat Shrink Wrap is used for the sale and transportation of various products, and its main role is to stabilize, cover and protect products. Shrinkage film must have high puncture resistance, good shrinkage and a certain shrinkage stress. During the shrinkage process, the film cannot create holes. Since shrink films are often suitable for outdoor use, UV anti-UV agents need to be added.



Category one

PE polyethylene, which is a transparent thermoplastic. PE commonly used there are three categories, namely :LDPE HDPE LLDPE three kinds of polyethylene monomer is the same, but, in the synthesis of these polyethylene, the process conditions used are not the same, therefore, to generate three different varieties of polyethylene, the performance of the three materials have great differences.

PE Shrink Wrap is a material with good toughness and is not easy to be crushed by ordinary plastic shredders. Because PE film is soft and tough, it is not easy to cut, not to mention high tool temperature at high speed, LDPE will melt and adhere to the blade. The PE granulation can be directly into strips into the extruder feeding port, and the PE film is dragged into the cylinder by the shear force of the screw to heat and melt the extrusion granulation.


PE Shrink Wrap is widely used in wine, cans, mineral water, all kinds of beverages, cloth and other products of the whole package, the product has good flexibility, impact resistance, tear resistance, not easy to damage, not afraid of moisture, shrinkage rate.



Category two

PVC Shrink Wrap, plus components to enhance its heat resistance, toughness, ductility and so on. The top layer of this surface film is lacquer, the main component in the middle is polyvinyl chloride, and the bottom layer is backcoated adhesive. It is one of the most popular and widely used synthetic materials in the world today. Among the materials that can produce three-dimensional surface films, PVC is the most suitable material.

Due to the unique properties of PVC (rain proof, fire resistance, antistatic, easy molding) and the characteristics of low input and high output of PVC, it is widely used in the building materials industry and packaging industry, therefore, PVC Shrink Wrap has high transparency, good gloss and high shrinkage.



Category three

POF has the characteristics of high surface gloss, good toughness, high tear strength, uniform thermal shrinkage and suitable for automatic high-speed packaging. It is a replacement of traditional PVC thermal shrink film. POF is the meaning of Heat Shrink Wrap, the full name of POF multi-layer co-extruded polyolefin heat shrinkable film, it is linear low-density polyethylene as an intermediate layer (LLDPE), polypropylene (pp) as the inner and outer layers, through three extruders plasticized extrusion, and then through the die molding, film bubble blowing and other special processes.



Category four

OPS (Heat Shrink Wrap) is a new type of packaging material that meets the requirements of environmental protection. OPS heat shrink film has high strength, high rigidity, stable shape, and good gloss and transparency. Easy processing, easy coloring, good printing performance, high printing resolution, for the continuous pursuit of fine printing of trademarks, is a material progress. Due to the high shrinkage rate and strength of the OPS film, it can be closely fitted with a variety of different shapes of containers, so it can not only print beautiful patterns, but also meet the use of a variety of different shapes of novel packaging containers, this non-toxic and tasteless, grease resistant, in line with food hygiene standards of the film can allow designers to use eye-catching colors, Achieve 360° label design, give full play to creativity and imagination, so that drinks and other goods in the use of the label pattern more vivid, highlighting the image on the shelf, producing an unexpected container effect.


Category five

PET Shrink Wrap is a new kind of shrinkable packaging material. Because it is easy to recycle, non-toxic, tasteless, good mechanical properties, especially in line with environmental protection and other characteristics, in developed countries polyester (PET) has become an ideal substitute for PVC heat shrinkable film.


However, ordinary polyester is a crystalline polymer, and ordinary PET films can only get a thermal shrinkage rate of less than 30% after special processing. In order to obtain a higher thermal shrinkage polyester film, it must also be modified. In other words, in order to prepare polyester film with high thermal shrinkage, common polyester, namely polyethylene terephthalate, needs to be copolymerized. The highest thermal shrinkage rate of the copolymerized PET film can be as high as 70%.


If you want to know more about the type of heat shrink film, please contact Xiamen Guanhua Technology Co., LTD.