Production equipment and process for preparing breathable film through one-step method

Abstract

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.

Description

technical field [0001] The invention relates to the technical field of gas-permeable film production, and more specifically relates to a production equipment and process for preparing a gas-permeable film by one-step method. Background technique [0002] Breathable film is a film with tens of thousands of micropores (pore size ranging from a few tenths of a micron to tens of microns) made of polymer materials through a specific production process. It is characterized by breathability and impermeability. It allows water vapor , Air and other gases pass through, but liquids are not allowed to pass through. At present, breathable membranes are widely used in personal hygiene products such as baby diapers and sanitary napkins, such as medical clothing, warm patches, medical protective clothing, breathable rainproof cloth, raincoats, food packaging, crop preservation, building waterproofing, drying bags, etc. . [0003] Traditional breathable membrane production process: raw ma...

AI Technical Summary

Problems solved by technology

However, the traditional process often requires the mixture to be granulated by granulation equipment, which is complex and requires the addition of a granulator, resulting in high production costs; at the same time, the raw materials are manually stirred, which is laborious and cannot guarantee the consistency of the supply ratio of each raw material. Thus affecting the quality of the breathable membrane

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