Self supporting bag manufacturer introduces test conditions of boiled bag
① Put 1 / 3 ~ 1 / 2 water into the packing bag and exhaust air as much as possible when sealing. If too much air is sealed in, it will easily lead to misjudgment. Cover during boiling test to slightly increase the pressure in the bag.
② The boiling time shall be subject to the customer's service conditions or according to relevant testing standards.
Expanding knowledge: the influence of resin release
The solvent volatilization in ink is more complex. When the resin is dissolved in the solvent, the molecules of the two substances are closely combined with each other. At this time, the evaporation rate of the solvent in the self-supporting bag is lower than that of the solvent itself. A certain viscosity of liquid ink, in the drying process attached to the solvent volatilization, resin content in the increase, the solvent volatilization speed will also slow down.
In particular, alcohol solvents have greater polarity, self-contained bags and polar polyamide resin are more attractive, especially alcohols with a slightly higher boiling point, are not easy to volatilize, which increases the amount of solvent in the remaining ink film and pollutes the packaging materials. Therefore, when selecting ink, we should try to use the ink of resin with better solvent release. www.ycritai.cn/
Dongguan Beite packaging materials Co., Ltd
Dongguan special bag, plastic bag, plastic bag, plastic bag