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What kind of vinyl agent is used to make black plaster?

Hot melt adhesive black plaster is a kind of external medical medicine, and the black glue in black plaster is hot melt adhesive. The advantages of using hot melt adhesive are simple process, low cost and strong viscosity, but the disadvantages are that the patch-type hot sol paste is easy to fall off when sweating, and the medicine is stuck by hot sol and is not easy to release. After being taken out, like rubber, the drug permeability is poor.