High-barrier multilayer co-extrusion infusion film

Abstract

The invention relates to a high-barrier multilayer co-extrusion infusion film which is a five-layer composite film with the composition from the outer layer to the inner layer: polyethylene naphthalate modified polyester/ ethylene acrylic acid polymer/ polypropylene, ethylene- octylene copolymer blending resin/ ethylene propylene polymer/ modified polypropylene. The advantages of various functional polymer materials are combined by the high-barrier multilayer co-extrusion infusion film, so that not only are the light transmittance, the flexibility, the high barrier performance, the low-temperature thermal sealing property, the thermal bonding strength and the like of the high-barrier multilayer co-extrusion infusion film guaranteed, but also the high-temperature-resistant (121 DEG C and 30min) sterilization performance and the low-temperature-resistant (-30 DEG C) storage performance of the high-barrier multilayer co-extrusion infusion film can be improved; therefore, the matters (including nonvolatile matter, easily-oxidized matter, heavy metal and the like) dissolved out from the infusion film are fewer, a biological or chemical reaction is not caused between the infusion film and liquid medicine after filling sterilization, and toxin is not generated or environmental pollution is not caused when the infusion film is produced, used and recovered. Compared with other similar products, the high-barrier multilayer co-extrusion infusion film has excellent competitive advantages in the aspect of all technical indexes such as production formula, production technique and performances.

Description

technical field [0001] The invention relates to the technical field of medical polymer materials, in particular to a high-barrier transfusion membrane. Background technique [0002] Plastic soft bag infusion can realize fully enclosed infusion, completely avoiding air pollution during infusion. It is the main packaging form of infusion packaging at present. Based on the existing technical level, the commonly used intravenous infusion drug packaging bag in practice is made of soft polyvinyl chloride (PVC) composite film. [0003] The glass transition temperature (Tg) of PVC is high, the material is hard, and it is difficult to process and shape. Therefore, plasticizers and other additives are generally added to PVC resin. At present, dioctyl phthalate (DOP) is still used as the main plasticizer in processing. However, DOP is a low-molecular substance, which is easy to migrate and precipitate. DOP plasticized PVC is used in medical catheters or containers, because DOP is e...

AI Technical Summary

Problems solved by technology

The dry lamination process is characterized by simple operation and flexible interlayer collocation, but its biggest defect is that the surface tension of the adhesive layer is relatively high. Although the adhesive solvent is dried with a large power, it is inevitable that there will be solvent residues. , and waste of energy, dry waste gas and volatilization of organ

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