The invention discloses production equipment and process for preparing a breathable film through an one-
step method. The production equipment comprises a rack, a collecting hopper, a double-rotor continuous internal mixer and a
casting machine; the collecting hopper is fixedly installed on the rack, a feeding port is formed in the upper end of the collecting hopper, and a first discharging port isformed in the lower end of the collecting hopper; an internal mixing
barrel on the double-rotor continuous internal mixer is fixedly installed on the rack, and the internal mixing
barrel is located below the material collecting hopper; a first material receiving opening and a second material discharging opening are formed in the internal mixing
barrel, and the first material receiving opening communicates with the first material discharging opening; a
casting screw cylinder on the
casting machine is arranged on the rack through a supporting frame, a second material receiving opening is formedin the casting screw cylinder, and the second material receiving opening communicates with the second discharging opening through a pipeline; and the
tail end of the casting screw cylinder is connected with a
casting mold. Through the stirring of the internal mixing cylinder, the
raw material is fully and uniformly mixed and primarily plasticized, and continuously enters the casting screw cylinder in a semi-
molten state in the mixing motion to be plasticized again, so that the
raw material low-temperature mixing plasticizing effect is good, and the
coke phenomenon in the casting screw cylinder and the
casting mold can be reduced.