Packaging Film Coating

Packaging Film Coating

Suiable for common PET/double-side tape/bopp tape/foam tape/paper sereis/pe protective film.

1.     Automatic tension control.
2.     Gravure coating or semiflexo coating.
3.    Drying tunnel with sectional temperature control and recirculation adjustment.
4.    Steel idle rollers inside the drying hood driven by independent motor.
5.     Inner stainless steel frame covers of the coating section.
6.     preading roller driven by independent motor,positioning pneumatically.

 

Packaging Film Coating

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.

Packaging Film Coating

Coating operation process --

Before starting the machine, cut the PET film required for coating according to the size; check whether the coating roller, back roller and knife roller are clean. (Other auxiliary rollers include oven and also check)
? Check whether the belt is correct before and after, and whether the aluminum foil is wrinkled. Once found, correct it in time.
? Open air, open power (total power)
? Turn on the phone, press the touch screen tension button, and correct the button (and set the front and rear correction to auto-correction)
? Set the coating speed (pre-set, and then set according to the viscosity of the slurry and the humidity after drying)
? Click the heating button to preheat the drying tunnel (usually turn on the heating 30 minutes before the coating, the heating temperature can be adjusted according to the actual condition)

About

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

Got any Questions?
CALL US NOW

+86-17744612788

gl006@guolianjixie.com