Reasons and solutions for inadequate sealing during use of the plastic bag sealing machine
(1) The heat sealing temperature of the plastic bag sealing machine is not enough
Under normal circumstances, when the total thickness of the composite bag with OPP as the lining is 80～90μm, the heat sealing temperature should reach 170～180℃; the total thickness of the composite bag with PE as the lining is 85～100μm At this time, the temperature should be controlled at 180～200℃. As long as the total thickness of the bag is increased, the heat sealing temperature must be increased accordingly.
(2) The heat sealing speed of the plastic bag sealing machine is too fast
Unsealable is also related to the speed of the sealing machine. If the speed is too fast, the sealing part will be transported to the cold pressing part for cooling treatment before it is heated in the future. Naturally, the heat sealing quality requirement will not be met.
(3) The pressure of the cold pressing rubber wheel of the plastic bag sealing machine is not suitable
There is one upper and lower cold-pressed rubber wheel, and the pressure between them should be moderate. When adjusting the pressure, you only need to clamp the spring.
(4) There is a problem with the quality of the heat sealing film of the plastic bag sealing machine
The inability to seal the seal is also related to the quality of the heat-sealed film. If the corona treatment of the composite lining is uneven, the effect is not good, and it happens to be at the seal, it will definitely not be sealed. This situation is rare, but once it occurs, the product must be scrapped. Therefore, in the color printing and packaging industry, the next process is to supervise the previous process. Once a quality problem is discovered, the cause must be analyzed and resolved in time.
If there is moisture or dirt on the seal, the seal will not be firm.
Exhibition: The 124th Canton Fair
Date：October 15th. -19th.,2018
Exhibition address:China Import and Export Complex
Booth No.: 1.1E08-09