Anti static bag manufacturer introduces ripening process requirements of boiled bag
General aging conditions: temperature 50-55 ℃, 48 hours.
In addition, attention should be paid to the aging uniformity of the whole coil: ① whether the display temperature is consistent with the actual temperature near the coil (the actual temperature at the top and bottom of the coil); ② whether the air near the coil can realize effective convection; ③ the influence of the surface temperature of the winding on the ripening: there is a certain process of heat transfer, and whether the curing conditions of the composite film of the core meet the requirements. (this may be a major cause of quality instability.)
4、 Bag making technology
The heat sealing strength of boiled bags is better, and the more important thing is that the quality of the whole batch should be stable, such as: 1) the anti-static bag has no local poor sealing phenomenon; 2) the whole batch has no individual bad sealing phenomenon.
Pay attention to the following points when making boiled bags:
① Under the condition of ensuring the sealing appearance, set a slightly higher heat sealing temperature to avoid the instability of thermal sealing quality caused by the thickness deviation of composite film.
② During normal production, the effective heat sealing times of three times should be ensured. When the machine is turned on again after shutdown, the surface of the parts that have been hot pressed once or twice may be cooled when the machine is started again (the first hot pressing can only play the role of preheating), and the actual effective heat sealing times are only two times. Therefore, it is necessary to set a higher heat sealing temperature (hot pressing twice can achieve good heat sealing), so as to avoid a small number of poor sealing phenomenon when starting up again after shutdown.
③ Most of the boiling bags are liquid packaging, so the anti-static bag has high requirements on the anti-static bag. The undercutting phenomenon of the heat sealing edge should be avoided when making the bag, especially the edge of the heat sealing knife should not be too sharp, and should be chamfered or polished properly.
Expanding knowledge: the influence of environment
The higher the ambient temperature, the faster the solvent volatilization speed, the faster the air flow in the workshop, the faster the solvent volatilization speed, and vice versa. www.ycritai.cn/
Dongguan Beite packaging materials Co., Ltd
Dongguan special bag, plastic bag, plastic bag, plastic bag