On the quality of antistatic bags from the firmness level of bags
The bag made of bag is usually torn by hand, which is difficult to tear. It can be used to hold heavy products such as stones and large particles. The firmness is mainly divided into two types, in accordance with firmness and hot air firmness. Because of different materials, Wuxi aluminum foil bags have different firmness levels. ? the main distinguishing method is to tear the edge of the bag by hand. The bags made of OPP heat sealing film are easy to tear, and can only hold some light products. After the bag is torn, it depends on the shape and structure of the cross section. If the bag is evenly torn from the middle of the heat sealing part of the bag, it means that the heat sealing of the bag is very poor and easy to be broken during the production process; if the bag is torn from the sealing edge, the heat sealing quality of the anti-static bag is better; it also depends on the bag The method of composite firmness is to first look at several layers of structure at the crack, and then use hand to see if it can be separated. If it is not easy to separate, it indicates that the composite firmness is good, otherwise, it is poor; in addition, to check the firmness level of the bag, at the same time, see whether there are bubbles or wrinkles on the surface of the bag.
Packaging material knowledge: solvent residue of adhesive phenomenon on the opposite side in soft antistatic bag packaging printing
Solvent residue is another cause of adhesion on the reverse side of printed matter, which is difficult to prevent in printing factories. During identification, you can press the large area of ink in the printed matter with the palms of both hands. After a few minutes, if the printed matter is found to be sticky, it indicates that there is residual solvent.
The solvent residue is mainly due to the improper proportion of the true and false solvents in the printing ink solvent and the insufficient purity of the solvent. The printing factory should choose the solvent with high purity to prepare the ink diluent, and contact the ink manufacturer to obtain the ratio of the diluted solvent to ensure that the solvent is completely volatilized and avoid the adhesion of the printed matter on the opposite side caused by the residual solvent. http://www.ycritai.cn/
Dongguan Beite packaging materials Co., Ltd
Dongguan special bag, plastic bag, plastic bag, plastic bag