Dry-Type Coating Station

Dry-Type Coating Station

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.

Dry-Type Coating Station

BOPA film ---

 

BOPA film manufacturing method
According to the different gravure printing methods of the production process, the manufacturing method of BOPA film can be divided into flat film method and tube film method, and the flat film method is mainly introduced here. At present, the production methods of flat film BOPA film are divided into two categories: two-step method and synchronous method. The synchronous biaxial stretching process is as follows: raw material drying→melt extrusion→cooling slab→casting thickness measurement→simultaneous biaxial stretching→heat setting→film thickness measurement→traction, trimming→winding→cutting→packaging Library. The two-step biaxial stretching process first performs longitudinal stretching and then transverse stretching, and the other processes are basically the same as the simultaneous biaxial stretching process. The two-step biaxial stretching technique has one of the biggest drawbacks: the bowing effect is large. This effect can result in a significant portion of the BOPA film product being produced that does not meet the very stringent requirements of the end user, such as high quality printed packaging. The synchronous biaxial stretching process can effectively improve the bowing effect problem, and the produced BOPA film has the characteristics of good quality balance and has a good market prospect.
The method of testing the bowing effect in the laboratory: determining the thermal shrinkage rate of the diagonal line, the smaller the difference between the two, the better the balance of the product; the difference is less than 1.5%, and the warp angle is not generated when the bag is formed.

Dry-Type Coating Station

Note on the use of the coater:

2.2 Method of operation:
1) Start up and clean the equipment according to the equipment operation regulations.
2) Under the manual correction, wear the belt according to the requirements of the belt, and restore the automatic correction after wearing. 3) Set the coating temperature, coating speed, speed ratio, and blade gap according to the following table.
4) Start each section of the drying tunnel fan and heating equipment, and the coating can be applied until the temperature of the drying tunnel reaches the process.
5) Pre-adjust the blade gap according to the film density requirements and experience, and fine-tune with the feeler gauge to adjust the blade after adjustment.
6) Set parameters such as coating length, interval, fiber positioning and fiber inspection according to the requirements of the process drawings and the type of ingredients.
7) Install the chute and baffle, and set the “forbidden coating” parameter to the effective state, and turn on the “stirring” kinetic energy.
8) When coating, first press “coating roller”, then press “coating”, and finally cancel “forbidden coating”;
9) After the first side is applied, the parameters should be adjusted according to the process requirements. After the temperature is stable, the second side can be driven by the vehicle.
10) During coating, the film length, empty foil length, and sheet weight of the first side and the second side should be measured at any time and recorded.
11) When the coating is stopped, first press “Forbidden Coating”, then cancel “Coating”, and finally cancel “Coating Roller”. 12) Short-term parking should keep “stirring” on, “painting roller” on and set its line speed to 500m/min.
13) The coated pole piece should be placed on a special iron frame and marked with the mark, and transferred to the next process.
14) Shut down according to the requirements of the equipment operation rules, clean the coating roller, scraper and utensils with alcohol, and do 5S work.