Cloth Tape Coating Making Machine

Cloth Tape Coating Making Machine

It is suitable for manufacturing hot stamping film, laser film, gold and silver paperboard which need coating and laminating. 
 

Cloth Tape Coating Making Machine

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.

Cloth Tape Coating Making Machine

Note on the use of the coater:

 

2.4. Coating job related product quality issues:
1) How to judge the quality of the coating?
The surface of the pole piece is flat, smooth, uniform in dressing, good in adhesion, dry, not to be stripped, not lost, lack of material, no dust, particles, no scratches, no bubble, the pole piece is a good pole piece, defective The bad pole piece.
2) What are the factors related to the uneven density of the film? How to adjust?
Irregularity and unevenness: the slurry is not uniform, the local solid-liquid ratio is large, the membrane is dense, and the solid-liquid ratio is small, the membrane density is small, and the stirring is enhanced. Vertical and horizontal unevenness: uneven seam, adjustable skew or coating roller, scraper has been deformed, should be adjusted or replaced. Horizontal and vertical unevenness: The speed of the coating roller or the back roller motor fluctuates and should be repaired.
3) How do you judge whether the pole piece has been dried and the temperature is too high? Non-stick rolls, no curling, sticky rolls are too cold, and curling is too hot.

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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

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