Abstract: An adhesive coating and perforating device for a medical adhesive tape comprises a rack (1), an unwinding roller (2), a winding roller (3), a hot melt adhesive die head (4), an adhesive coating roller (5), a support roller (6) and a perforating roller (7); the unwinding roller (2) is used for placing a cotton cloth to be coated with adhesive, the winding roller (3) is used for winding the adhesive tape coated with adhesive, the hot melt adhesive die head (4) is used for heating a hot melt adhesive and coating the hot melt adhesive on the cotton cloth, the adhesive coating roller (5) is used for pushing the cotton cloth in a direction towards the hot melt adhesive die head (4), and a surface of the perforating roller (7) is provided with protruding points for perforating the hot melt adhesive on a surface of cotton cloth.

Abstract: Provided in the present invention a method for evaluating the mixing effect of a CO2 oil-displacing and mixing agent, characterized in measuring the volume expansion of a CO2-oil interface when pressure is gradually increased, drawing a mixed-phase percentage-pressure curve (?-P curve), and evaluating the mixing effect of the CO2 oil-displacing and mixing agent by means of comparing the characteristics of the ?-P curve. Further provided in the present invention is a method for initially screening a CO2 oil-displacing and mixing agent.

Abstract: An adhesive coating and perforating device for a medical adhesive tape comprises a rack (1), an unwinding roller (2), a winding roller (3), a hot melt adhesive die head (4), an adhesive coating roller (5), a support roller (6) and a perforating roller (7); the unwinding roller (2) is used for placing a cotton cloth to be coated with adhesive, the winding roller (3) is used for winding the adhesive tape coated with adhesive, the hot melt adhesive die head (4) is used for heating a hot melt adhesive and coating the hot melt adhesive on the cotton cloth, the adhesive coating roller (5) is used for pushing the cotton cloth in a direction towards the hot melt adhesive die head (4), and a surface of the perforating roller (7) is provided with protruding points for perforating the hot melt adhesive on a surface of cotton cloth.

Abstract: Provided in the present invention a method for evaluating the mixing effect of a CO2 oil-displacing and mixing agent, characterized in measuring the volume expansion of a CO2-oil interface when pressure is gradually increased, drawing a mixed-phase percentage-pressure curve (?-P curve), and evaluating the mixing effect of the CO2 oil-displacing and mixing agent by means of comparing the characteristics of the ?-P curve. Further provided in the present invention is a method for initially screening a CO2 oil-displacing and mixing agent.