In recent years, aluminum foil marijuana mylar bags have been favored by foodHighly sought after by the high-level industry, aluminum foil marijuana mylar bags have very high performance characteristics: non-toxic, light-proof, good sealing, not easy to break and leak, play a good role in preventing pollution and extending the shelf life, but usually aluminum foil marijuana mylar bags are heat-sealed Sometimes there will be some problems, so today the three-dimensional marijuana mylar bag manufacturer will explain the six factors that affect the heat sealing of aluminum foil marijuana mylar bags:1. Production technologyUnder the control of certain process parameters, the adhesive is coated on the surface of the original aluminum foil to form a film. The quality of the film will directly affect the heat-sealing strength of the product. Among them, the more important parameters include the speed of coating, the segmental temperature of the drying tunnel, the shape, depth, number of lines, and the position and angle of the scraper of the coating roller.The speed of coating determines the drying time of the coating in the drying tunnel. If the coating speed is too fast and the temperature of the drying tunnel is too high, the solvent on the surface of the coating film will evaporate too quickly, resulting in a surplus of solvent in the film, and the coating film will not be fully dried, and it will be difficult to form a dry, strong and strong adhesive layer. It affects the heat seal strength of the product and causes adhesion between product layers.The anilox shape, depth, number of lines of the coating roller and the position and angle of the scraper determine the thickness and uniformity of the coating film. If the selection or adjustment is not appropriate, the adhesive will not be evenly coated on the surface of the original aluminum foil, resulting in uneven film formation, the heat sealing effect of the product will not be good, and the strength will also be affected.2. Heat sealing timeThe heat sealing time will also affect the heat sealing strength of the product. Under normal circumstances, under the same heat-sealing temperature and pressure, a longer heat-sealing time can make the heat-sealing parts more solid and perfect, and better achieve the expected heat-sealing strength. However, the process conditions of modern high-speed pharmaceutical packaging machines cannot provide a long time for heat sealing. If the heat sealing time is too short, the adhesive layer andpvcThere will be insufficient heat sealing between the films. For this reason, the national standard stipulates that the scientific heat-sealing time is1s.3. Raw and auxiliary materialsThe original aluminum foil is the carrier of the adhesive layer, and its quality has a great influence on the heat sealing strength of the product.On the one hand, the oil on the surface of the original aluminum foil will weaken the adhesion between the adhesive and the original aluminum foil. If the surface of the original aluminum foil is oily and the surface tension is lower than31×10-3μmWhen, it is difficult to achieve the ideal heat sealing strength. On the other hand, the metal composition and surface gloss of the original aluminum foil will affect the strength of the heat seal, so the quality of the original aluminum foil must be strictly controlled.4. Heat sealing temperatureHeat-sealing temperature is an important factor affecting heat-sealing strength. Temperatures that are too low do not allow the bondline to bond well to thepvcFilm heat sealing, adhesive layer andpvcThe bond between the films is not strong. If the temperature is too high, it will affect the medicine. Therefore, a more reasonable heat-sealing temperature is generally150℃~160between ℃.5. AdhesivesAdhesive is a special substance containing solvent. It is coated on the dark side (or smooth side) of the original aluminum foil under certain process conditions and dried in the oven to form an adhesive layer, which plays a decisive role in the heat-sealing strength of the product. .At present, most domestic manufacturers use imported raw materials to prepare adhesives, and the products can achieve high heat sealing strength. However, the price of imported raw materials is too expensive. In order to obtain high profits for the products, some manufacturers with strong scientific research strength have started to research and develop similar domestic materials.Sixth, the heat sealing pressure To achieve the ideal heat sealing strength, it is necessary to set a certain heat sealing pressure. If the pressure is insufficient, not only the adhesive layer of the product and the PVC film cannot be fully bonded and heat-sealed, but even the air bubbles will remain between the two, and a good heat-sealing effect cannot be achieved. The equipment packaging marijuana mylar bag manufacturer tells you that the national standard stipulates that the pressure of heat sealing is 0.2×10Pa.