1. 150m/min high speed has already reached the international most advanced level.
2. Rewind and unwind both adopt double position and equip with semi-automatic to connect paper device, The machine can change the rolls of base material nonstop， It will reduce the waste.
3. When the double sides adhesive tape coat twice, it will effect the quality of products, but the technology of double sides coating meanwhile will solve the questions.
In the coating process, the coating gap is poor and the pole piece wrinkles are analyzed:
3. The front and back are not aligned
(1) Operational aspect: the first side gap is consistent. The operating parameters are not adjusted well. The light eye is blocked. The unwinding pinch roller forgets the clip.
(2) Equipment: The tension behind the second side is large. The front tension is small.
4 When the middle is turned on, the white space becomes smaller, and the back 3-4 pieces are inaccurate.
Equipment: The tension is not allowed at the beginning of the start. The first side has no memory function. The foil strip slides forward 2-3mm when starting. The tension starts first when starting. The back roller does not turn. The coating head has no pinch roller or is not clamped.
5. The last piece is in a parallel trailing tail
Operation: coating the back roller spacing (the first side is tailed, the second side is not trailing); the back roller is pulled slowly when the machine is stopped 6. The head thickness is thin or the head is thin and thick. Operation: The head and tail parameters are not adjusted well 7 There is no effect on the action
(1) Material: The foil is tight on both sides
(2) Equipment: the foil tension is small and the moment leaves the back roller.
8. Double-sided large piece of whitening phenomenon: the light eye is not sensed. The first side gap is abnormal. The light eye is covered.
(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