Medicinal symmetrical cold-forming aluminum-casting plate

Abstract

The invention relates to a medicinal symmetrical cold-forming aluminum-casting plate. The medicinal symmetrical cold-forming aluminum-casting plate is of a layered structure and composed of an aluminum base layer, novel functional adhesive resin (AD) closely attached on the outer side and the inner side of the aluminum base layer, an outer layer and an inner layer, wherein the outer layer sequentially comprises a polyamide (PA) layer, novel functional adhesive resin (AD) and a homo-polypropylene (PP) layer, and the inner layer comprises a PA layer, novel functional adhesive resin (AD) and a homo-polypropylene layer; the relatively thick aluminum base layer has good ductility and good mechanical property and also has good barrier property; the PA layers can well protect the aluminum base layer, can uniformly stretch especially during molding and can ensure the molding depth; the homo-polypropylene (PP) layers can ensure the barrier property and prevent the PA protective layers from being scratched; the inner layer is made of a PP material, has good stability and drug resistance, has good low-temperature heat-sealing property and high heat-seal strength; and the whole structure material is symmetrical, has uniform stress and is free from edge warping phenomenon after pit scouring.

Description

technical field [0001] The invention relates to the technical field of laminating packaging materials for pills, in particular to a symmetrical cold-formed aluminum cast hard sheet with high barrier performance and low-temperature heat sealing. Background technique [0002] At present, the cold-formed aluminum hard sheets for medicinal purposes on the market are widely used in the packaging of medicines, but the cold-formed aluminum hard sheets on the market are all produced by a dry composite process, and layers are made of special materials. Solvent functional adhesive, the heat seal layer is also coated with a solvent functional adhesive, which brings a lot of problems, one is that the solvent will evaporate and dry, and a lot of pungent odor will be produced during the production process. It takes a long time to cure and dry the product (usually more than a week). At present, high-power curing boxes are used for drying. Curing is dry, but there is always residue, and t...

AI Technical Summary

Problems solved by technology

[0002] At present, the cold-formed aluminum hard sheets for medicinal purposes on the market are widely used in the packaging of medicines, but the cold-formed aluminum hard sheets on the market are all produced by a dry composite process, and layers are made of special materials. Solvent functional adhesive, the heat seal layer is also coated with a solvent functional adhesive, which brings a lot of problems, one is that the solvent will evaporate and dry, and a lot of pungent odor will be produced during the production process. It takes a long time to cure and dry the product (usually more than a week). At present, high-power curing boxes are used for drying. Curing and drying, but there is always residue, and the residual solvent will cause different degrees of damage to the medicine

The third is that the functional adhesives with solvents have poor adaptability to the environment. Changes in the environment will affect the performance changes of the functional adhesives with solvents, resulting in layering of the material and making it unusable.

[0003] At present, the heat-sealing temperature of cold-formed aluminum hard sheets for medicinal purposes in the market is generally higher than 150°C. If the heat-sealing temperature is high, it may cause damage to the packaged medicines, especially some medicines, such as soft capsules, if the heat-sealing temperature is high. It can cause the deterioration of the medicine package, so the material with low heat sealing has great market prospect

Images