The main raw material of PVC medicinal hard sheet is polyvinyl chloride resin. The surface of the packaging material is smooth, transparent and uniform in thickness. It is easy to form, easy to seal with PTP aluminum foil, and has good oxygen barrier and water vapor barrier properties. After molding, the blister is firm and can have good support and protection for the contents. Mainly used in the packaging of solid pharmaceutical preparations, and can also be used in the packaging of medicinal injection holders, medicinal oral liquid holders, food and health care products. The physical properties of PVC hard sheets are stable, and only adverse reactions occur with a few chemical solvents, generally not with solid substances. Therefore, the safety performance of medicines and food can be guaranteed.