It's be mainly used for bopp film gelatinizing producing，The tape is mainly used to seal the box, seal the cover and bind the articles, and can also be used as office supplies.
Second, the length of the coating section changes, the spacing is unstable:
3. Reasons and countermeasures for the phenomenon of wrinkling of the pole piece during the operation of the coater
1. The overall installation accuracy is low. The installation center of each component deviates from the center line of the whole machine design, or it has an angle with the design center. The foil strip will be seriously wrinkled and the installation center must be adjusted.
2. The excessive parallelism between the rollers will cause the foil strip to wrinkle. It is necessary to check carefully whether the vertical projection surfaces are not parallel or the horizontal plane is not parallel, and then adjust.
3. The roughness of the surface of the roller is too poor, the surface of the roller is not smooth enough, and the foil is wrinkled when there is obvious processing texture. It needs to be replaced by the manufacturer.
4. The back roller and each roller are stuck with foreign matter or use too much water. Isopropyl alcohol scrubbing requires frequent inspection, timely detection and cleaning, and careful not to damage the roller surface.
5. The foil strip joint is not good. When the tension between the two sides of the foil strip is unbalanced, the pole piece is wrinkled. First adjust the tension adjusting roller under the coating head. After the foil strip is gradually stable, adjust the adjusting roller to the original state.
(7) PET shrink film
Polyester heat shrinkable film is a new type of heat shrinkable packaging material. Due to its easy recycling, non-toxicity, odorlessness, good mechanical properties, and especially environmental protection, polyester (PET) has become an ideal substitute for polyvinyl chloride (PVC) heat shrinkable film.
However, the ordinary polyester is a crystalline high polymer, and the ordinary PET film can only obtain a heat shrinkage rate of 30% or less by a special process. To obtain a polyester film with a higher heat shrinkage rate, it must also be modified. That is, in order to prepare a polyester film having a high heat shrinkage ratio, it is necessary to copolymerize a common polyester, that is, polyethylene terephthalate. The copolymerized modified PET film has a maximum heat shrinkage rate of more than 70%.
The characteristics of the heat-shrinkable polyester film: it is stable at normal temperature, shrinks upon heating (above the glass transition temperature), and is more than 70% heat shrinkage in one direction. The advantages of heat shrinkable polyester film packaging are:
1 The body is transparent, reflecting the image of the product.
2 tightly packed with good anti-scattering properties.
3 rain, moisture, mildew.
4 no recovery, there is a certain anti-counterfeiting function. Heat shrinkable polyester film is often used in the convenience food, beverage market, electronic appliances, metal products, especially shrinkage labels are its main application areas. Because with the rapid development of PET beverage bottles, beverage bottles such as cola, sprite, and various juices need PET heat shrinkable film to be used as a heat seal label. They are all polyester-based, environmentally friendly materials, and easy to recycle. use.
In addition to being used as a shrink label, heat-shrinkable polyester film has also been used in outer packaging for daily use products in recent years. Because it can protect the packaged goods from impact, rain, moisture, rust, and the product can win the user with a beautifully printed outer packaging, and it can show the good image of the manufacturer. At present, more and more packaging manufacturers use printed shrink film to replace traditional transparent film. Because the printing shrink film can improve the appearance of the product, which is conducive to the advertising of the product, the trademark brand can make a deep impression on the consumer.
Zhengzhou EAST IMPORT AND EXPORT co., ltd . ( a goulian group of company) a manufacturer and exporter for all kind of packaging machinery , like bopp tape coating machines, bopp tape slitting machines. Bopp tape core cutter, bopp tape core loader etc