BOPP Film Quality Standards

BOPP Film Quality Standards
Slitting: mother roll unwinding from the winder, due to transport inconvenience, the size of the film can not meet the talk requirements. Therefore, at the factory according to user requirements must be cut, the mother lane cut into a specific width and a certain length of the small roll, the machine to complete this work is called Slitter.<br /> After...

    Slitting: mother roll unwinding from the winder, due to transport inconvenience, the size of the film can not meet the talk requirements. Therefore, at the factory according to user requirements must be cut, the mother lane cut into a specific width and a certain length of the small roll, the machine to complete this work is called Slitter.
    After the thin slitting machine slitting, the final product quality depends not only on the film's physical, mechanical, electrical and other properties, but also with the product of the following conditions: tightness of the film winding, the end face is neat, the presence of film Dust, dust, crystal point and other products, the length and width of the meet the needs of the film with or without wrinkles, scratches, hard spots, rivets, the number of joints is within the allowable limit.
    The basic structure of the slitting machine is as follows: ① The unwinding arm can move the stone to the left of the slitting machine so as to eliminate the surface irregularity caused by the film thickness deviation. ② tension floating roller: tension is loose, will cause the volume of the film rolling volume. Tension captive roller through the change of position to adjust the tension of the film and the coiling speed of the corresponding change, and ultimately ensure the consistent effect of winding elastic. ③ slitting machine swing control system with the unwinding arm moving around the same effect. The main role of the guide roller is to change the film to make the film from the unwinding shaft to the winding shaft. ⑤ automatic transmembrane system chain, sprocket and tensioning device in three parts. ⑥ flat roller to reach the role of tension membrane. ⑦ knife and groove roll tear to fix the blade position. ⑧ winding arm
    Possible product quality incidents in the slitting process and their causes are as follows.
    Vertical stripes: ① slitting machine roll angle is not correct; ② the thickness of the film itself; ③ wobble system failure; ④ film and core viscose is not good.
Dislocation of the product end face: ① winding tension pressure is small ② winding arm imbalance; ③ cutting speed is too fast, into the air, the film slippage; ④ film surface friction coefficient is small;
    Alice side: ① cutter is not sharp; ② contact pressure is too large; ③ unwinding tension; ④ use the wrong type of cutter. .
BOPP film quality standards: Universal biaxially oriented polypropylene film implementation of GB10003-88 standard, heat sealing type: biaxially oriented polypropylene film implementation of GB12026-89 standards, biaxially oriented polypropylene film capacitors to implement GB12802-91 standards.


Source: www.handern.net