packaging is very important for commodities, and sometimes the way merchants package products directly determines the sales volume of commodities. Sometimes, some packaging is the management of goods by merchants, and sometimes packaging is the upgrade of products by merchants. What Xiaobian wants to tell you today is a material about packaging, which is called shrink film. The so-called shrink film may not be understood without reading the article. Let's just say that the layer of plastic paper that packs beer, cola and other drinks is called shrink film.

classification of shrink film

shrink film is used in the sales and transportation of various products. Its main function is to stabilize, cover and protect products. Shrinkage film must have high puncture resistance, good shrinkage and certain shrinkage stress. In the process of shrinkage, the film cannot produce holes. Because shrink film is often suitable for outdoor use, it is necessary to add UV anti-ultraviolet agent. Including OPS/PE/PVC/POF/PET? Shrinkage film

1)PE heat shrinkable film is widely used in the whole package of wine, cans, mineral water, various beverages, cloth and other products. The product has good flexibility, strong impact resistance and tear resistance, and is not easy to be damaged, moisture-proof and has a large shrinkage rate;

2)PVC film has the characteristics of high transparency, good gloss and high shrinkage;

3)POF has the characteristics of high surface gloss, good toughness, high tear strength, uniform thermal shrinkage and is suitable for automatic high-speed packaging. It is the replacement product of traditional PVC heat shrinkable film. POF means heat shrinkable film, and POF is the full name of multi-layer extruded polyolefin heat shrinkable film. It is made of linear low density polyethylene (LLDPE) as the middle layer and polypropylene (pp) as the inner and outer layers, plasticized and extruded by three extruders, and then processed by special processes such as die forming and film bubble inflation.

4) The ops shrink film (oriented polystyrene) heat-shrinkable film is a new type of packaging material sticking to OPS heat shrinkable film, which meets the requirements of environmental protection. The OPS heat-shrinkable film has high strength, high rigidity, stable shape, and good gloss and transparency. Convenient processing, easy coloring, good printing performance and high printing resolution, which is completely a material progress for trademarks that are constantly pursuing exquisite printing. Because of the high shrinkage and strength of OPS film, it can be closely attached to containers with different shapes, so it can not only print exquisite patterns, but also meet the use of novel packaging containers with different shapes. This kind of film, which is non-toxic, tasteless, resistant to grease and conforms to food hygiene standards, allows designers to adopt eye-catching colors, realize 36 label design, and give full play to creativity and imagination, thus making the patterns of drinks and other commodities more vivid and prominent in label use. 5) Features of 5)PET heat-shrinkable polyester film: It is stable at room temperature, shrinks when heated (above the glass transition temperature), and more than 7% of the heat shrinkage occurs in one direction.

The advantages of heat-shrinkable polyester film packaging are as follows:

① It is transparent and reflects the image of goods.

② Tight packing, good anti-scattering.

③ rain-proof, moisture-proof and mildew-proof.

④ it has no resilience and has certain anti-counterfeiting function.

Heat shrinkable polyester films are often used in convenience food, beverage market, electronic appliances and metal products, especially shrink labels. Because with the rapid development of PET beverage bottles, such as cola, sprite, all kinds of fruit juice and other beverage bottles need PET heat shrinkable film to be matched with them for heat sealing labels. They belong to polyester, are environmentally friendly materials, and are easy to recycle. Heat shrinkable polyester film is not only used as shrink label, but also used in the outer packaging of daily goods. Because it can not only protect the packaged goods from impact, rain-proof, moisture-proof and rust-proof, but also make the products win users with beautifully printed outer packaging, and at the same time, it can well show the good image of the manufacturers. Nowadays, more and more packaging manufacturers use printed shrink film to replace the traditional transparent film. Because printing shrink film can improve the appearance grade of products, is conducive to product advertising, and can make trademark brands have a deep impression on consumers.

Principle of shrink film packaging machine

Arbitrary adjustment. Casters installed at the bottom can be pushed at will, and the height can be adjusted at will according to the package size.

workflow

1,? First, set the heating time for the machine

2. After pressing the manual or automatic button, the electric output of the solenoid valve of the rack cylinder pushes the gear, and the gear drives the chain. At this time, the rear proximity switch of the rack cylinder is turned off. When the rack cylinder runs to the top dead center, the front proximity switch of the rack cylinder is turned on, and the electromagnetic valve of the oven cylinder is electrically output.

3、? When the oven cylinder runs to the top dead center, the timer starts to delay, and the rack cylinder solenoid valve is powered off.

4、? At the end of the timing, the electromagnetic valve of oven cylinder is powered off.

5、? According to the work mode flag, decide whether to continue the next workflow.

That's all the information about shrink film that Xiaobian told you today. I believe that after reading Xiaobian's story, you have a comprehensive understanding of the classification of shrink films and how to use shrink films. Shrink film is indeed a kind of packaging material which is quite convenient, easy to use and cost-saving. Knowledge This packaging material is not environmentally friendly. It is difficult to recycle after use and the reuse rate is low, so it can be said that it cannot be reused. It is expected that there will be better and more environmentally friendly shrink films in the future.

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