For aluminum foil for drugs, the quality of aluminum foil bags for drugs is largely reflected in the heat sealing strength of commodities. Therefore, the six factors that affect the heat sealing strength of drug aluminum foil bags have become important factors to improve the quality of drug aluminum foil bags. Today, noside packaging manufacturer will explain several factors affecting the heat sealing of aluminum foil bags for drugs:
1. raw material of drug blister aluminum foil : raw aluminum foil is the carrier of adhesive layer, and its quality has a great impact on the heat sealing strength of drug aluminum foil bag.
On the one hand, the oil stain on the surface of the original aluminum foil will weaken the adhesion between the adhesive and the original aluminum foil. If there is oil stain on the surface of the original aluminum foil and the boundary layer tension is less than 31×10-3um, it is difficult to achieve the ideal heat sealing strength. On the other hand, the insufficient metal composition and surface brightness of the original aluminum box affect the strength of heat sealing, so the packaging manufacturer must strictly control the quality of the original aluminum foil when producing the aluminum foil bag for medicine.
2. adhesive layer of drug aluminum foil bag: adhesive is a special substance with organic solvent. It is coated on the dark side (or bright side) of the original aluminum foil under certain processing technology standards, and becomes an adhesive layer after drying in the drying channel, which plays a decisive role in the heat sealing strength of the drug aluminum foil bag
At present, most domestic manufacturers use imported raw materials to prepare adhesives, and the aluminum foil bags for drugs can achieve high heat sealing strength. However, the imported raw materials are too expensive, so that they can obtain high profits from the pharmaceutical aluminum foil bags. Manufacturers with strong scientific research force began to research and develop similar domestic raw materials
3. production process of drug aluminum foil bag: under the control of certain main processing parameters, the adhesive is coated on the surface of the original aluminum foil to form a film. The quality of the finished composite film will immediately affect the heat sealing strength of the drug aluminum foil bag. The key parameters include the coating speed, the section temperature of the drying channel, the shape, depth, number of lines of the coating roller, and the position and angle of the scraper.
4. heat sealing temperature of drug aluminum foil bag: the heat sealing temperature is the key factor affecting the heat sealing strength. The temperature is too low to make the bonding layer heat seal with PVC film very well, and the bonding between the bonding layer and PVC film is not firm. If the temperature is too high, the medicine will be affected. Therefore, the more effective heat sealing temperature is generally between 150C and 160C.
Sales Manager :Nina
WhatsApp:+86137 9701 3688
Email: sales805@perfecthengyu.com
