How to judge whether the aluminum foil bags up to standard?
5, sealing pressure - in order to achieve the desired heat seal strength, we need to set a certain sealing pressure. If the pressure is not enough, do not make the adhesive layer and aluminum foil bags pvc film products fully fit sealing, and therefore can not achieve a good sealing effect.
4, sealing temperature - heat sealing temperature is an important factor affecting heat seal strength. Taiji temperature then bonding adhesive layer between the pvc film will not solid. If the temperature is too high, it will make the drugs affected. Therefore, the most reasonable sealing temperature is generally between 150 ℃ ~ 160 ℃.
3, the production process - under certain process parameters, the adhesive applied to the surface of aluminum foil in the original filming, filming will directly affect the quality of heat seal strength of the product. The more important parameters such as coating speed. If the speed is too fast coating, drying temperature is too high, too fast solvent evaporation coating surface, resulting in residual film of the solvent, the film dries insufficient, this will affect the heat seal strength of the product.
2, adhesive aspect - special adhesive is solvent-containing substance, which under certain conditions applied to the dark side of the original aluminum foil, and bake drying after forming an adhesive layer on the heat seal strength of the product plays decisive role.
To see whether the aluminum foil reach thr quality standard, mainly to see the heat seal strength aluminum foil bag. Heat seal strength and impact foil bag is mainly composed of the following several factors to decide:
1, aspects of raw and auxiliary materials - aluminum foil is the original carrier of the adhesive layer, heat seal strength of its quality products have a deep impact. On the one hand it is the original aluminum foil surface oil will weaken the adhesive force between the adhesive and the original aluminum foil. On the other hand, the heat seal strength and also with the metal components of the original surface finish of the aluminum foil are not enough influence heat seal strength. It is necessary strictly to good quality primary aluminum foil.
