Production equipment and process for preparing breathable film by one-step method
阅读说明：本技术 一种一步法制备透气膜的生产设备及工艺 (Production equipment and process for preparing breathable film by one-step method ) 是由 刘飚 曹志勇 郑家标 邓伟建 陈书安 于 2019-03-07 设计创作，主要内容包括：本发明的一种一步法制备透气膜的生产设备及工艺,该设备包括机架,集料斗,集料斗固定安装在机架上,集料斗上端为入料口,下端为第一出料口；双转子连续密炼机,双转子连续密炼机上的密炼筒固定安装在机架上,且位于集料斗下方,密炼筒上开设有第一接料口和第二出料口,第一接料口与第一出料口连通；流延机,流延机上的流延螺杆筒通过支撑架设置在机架上,且流延螺杆筒上开设有第二接料口,第二接料口与第二出料口通过管道连通；流延螺杆筒末端连接有流延模具。通过密炼筒的搅拌,使原料充分混合均匀并初步塑化,在混合运动以半融状态连续进入流延螺杆筒中再塑化,其原料低温混炼塑化效果好,能减少流延螺杆筒及流延模具中的焦碳现象的发生。(The invention relates to production equipment and a process for preparing a breathable film by a one-step method, wherein the production equipment comprises a rack and a collecting hopper, wherein the collecting hopper is fixedly arranged on the rack, the upper end of the collecting hopper is a feeding hole, and the lower end of the collecting hopper is a first discharging hole; the device comprises a double-rotor continuous internal mixer, a first material receiving port, a second material discharging port, a first material collecting port, a second material discharging port, a first material discharging port and a second material discharging port, wherein an internal mixing cylinder on the double-rotor continuous internal mixer is fixedly arranged on a rack and is positioned below a material collecting hopper; the casting screw cylinder on the casting machine is arranged on the frame through a support frame, a second material receiving port is formed in the casting screw cylinder, and the second material receiving port is communicated with a second material outlet through a pipeline; the tail end of the casting screw cylinder is connected with a casting die. Through the stirring of banburying section of thick bamboo, make raw materials intensive mixing even and preliminary plastify, in mixing motion with the plastify in the continuous entering tape casting screw rod section of thick bamboo of half-melt state, its raw materials low temperature mixing plastify effectually, can reduce the emergence of the coke phenomenon in tape casting screw rod section of thick bamboo and the tape casting mould.)
1. The production equipment for preparing the breathable film by the one-step method is characterized by comprising the following steps of:
a machine frame (1),
the collecting hopper (2) is fixedly arranged on the rack (1), the upper end of the collecting hopper (2) is provided with a feeding hole (21), and the lower end of the collecting hopper is provided with a first discharging hole (22);
the device comprises a double-rotor continuous internal mixer (3), wherein an internal mixing cylinder (31) on the double-rotor continuous internal mixer (3) is fixedly mounted on a rack (1) and is positioned below a collecting hopper (2), a first material receiving port (311) and a second material outlet (312) are formed in the internal mixing cylinder (31), and the first material receiving port (311) is communicated with a first material outlet (22);
the casting screw cylinder (41) on the casting machine (4) is arranged on the frame (1) through a support frame (42), a second material receiving port (411) is formed in the casting screw cylinder (41), and the second material receiving port (411) is communicated with the second material outlet (312) through a pipeline; the tail end of the casting screw cylinder (41) is connected with a casting die (43).
2. The production equipment for preparing the breathable film by the one-step method according to claim 1, further comprising:
the feeding bin (5), the feeding bin (5) is arranged at the top of the rack (1);
the weight loss scale (6) is fixedly installed on the rack (1) and arranged between the material supplementing bin (5) and the material collecting bin (2), the top of the weight loss scale (6) is communicated with the lower end of the material supplementing bin (5), and the bottom of the weight loss scale (6) is communicated with the material inlet (21).
3. The production equipment for preparing the breathable film by the one-step method according to claim 1, wherein a single screw or parallel twin screws (44) for extruding materials are arranged in the casting screw cylinder (41) along the length direction; the casting machine (4) further comprises: a driving part (45) for driving the single screw or the parallel double screws (44), and the single screw or the parallel double screws (44) are fixedly connected with the driving end of the driving part (45).
4. The production equipment for preparing the breathable film by the one-step method according to claim 3, wherein the driving part (45) comprises:
the motor (451), the motor (451) is fixedly arranged on the frame (1);
the speed reducer (452) is fixedly mounted on the rack (1), an input shaft of the speed reducer (452) is connected with an output shaft of the motor (451) through a coupler, and an output shaft of the speed reducer (452) is fixedly connected with the single screw or the parallel double screws (44).
5. The production equipment for preparing the breathable film by the one-step method according to claim 1, further comprising: the outlet of the stirrer (7) is communicated with the feeding port (21) through a conveying pipeline (8).
6. A production process for preparing a breathable film by a one-step method is characterized by comprising the following steps:
step one, raw material preparation: weighing 48-50 parts of polyethylene, 48-50 parts of calcium carbonate and 2-4 parts of auxiliary agent according to the weight ratio for later use;
step two, equipment temperature rise and heat preservation: heating an internal mixing cylinder on a double-rotor continuous internal mixer and a casting screw cylinder on a casting machine respectively, and preserving heat for later use;
step three, banburying, stirring and plasticizing: feeding 48-50 parts of polyethylene, 48-50 parts of calcium carbonate and 2-4 parts of auxiliary agent into an internal mixing drum through a collecting hopper for banburying, stirring and plasticizing, and performing preliminary plasticizing to obtain a mixture in a semi-molten state;
step four, tape casting plasticization: the mixture in the third step is plasticized again through a casting screw cylinder to obtain a mixture in a molten state, and the mixture is extruded through a casting die;
step five, post-treatment: and embossing and cooling the mixture extruded by the casting die into a casting film thick sheet through a casting steel roller and a rubber roller, stretching the casting film thick sheet through a stretching roller after preheating the casting film thick sheet through a preheating roller, trimming and winding after heat setting, cold setting and corona spark treatment, and finally producing a breathable film finished product.
7. The production process for preparing the breathable film according to the one-step method of claim 6, wherein in the second step, the temperature of the internal mixing cylinder is 160-190 degrees, the heat preservation time is 0.5h, the temperature of the casting screw cylinder is 160-230 degrees, and the heat preservation time is 0.5 h.
8. The process for preparing a breathable film according to claim 6, wherein the stirring speed in step three is 600-650 r/min.
9. The production process for preparing breathable films according to claim 6, wherein in the third step, the steps of feeding 48 to 50 parts of polyethylene, 48 to 50 parts of calcium carbonate and 2 to 4 parts of auxiliary agent into an internal mixer through a collecting hopper for internal mixing and plasticizing further comprise:
and respectively feeding 48-50 parts of polyethylene, 48-50 parts of calcium carbonate and 2-4 parts of auxiliary agent into a collecting hopper after respectively measuring through a material supplementing bin and a weight loss scale.
10. The production process for preparing breathable films according to claim 6, wherein in the third step, the steps of feeding 48 to 50 parts of polyethylene, 48 to 50 parts of calcium carbonate and 2 to 4 parts of auxiliary agent into an internal mixer through a collecting hopper for internal mixing and plasticizing further comprise:
and stirring and mixing 48-50 parts of polyethylene, 48-50 parts of calcium carbonate and 2-4 parts of auxiliary agent by a stirrer, and then feeding into a collecting hopper.
Technical Field
The invention relates to the technical field of breathable film production, in particular to production equipment and a production process for preparing a breathable film by a one-step method.
Background
The air permeable film is a film which is made of high molecular material through a specific production process and is provided with tens of thousands of micropores (the pore diameter is from a few tenths of microns to tens of microns), and is characterized by being air permeable and water impermeable, and allowing gases such as water vapor, air and the like to pass through but not allowing liquid to pass through. At present, breathable films are widely used in personal hygiene products such as baby diapers and sanitary napkins, such as medical garments, warming patches, medical protective clothing, breathable waterproof cloth, raincoats, food packaging, crop preservation, building waterproofing, drying bags and the like.
The traditional film making process flow for breathable film production: raw materials (calcium carbonate, PE colloidal particles, auxiliary agent and drying agent) are stirred, heated, cooled into granules, heated, stretched, cooled and rolled into a film. The raw materials (calcium carbonate powder, PE colloidal particles, auxiliary agent and drying agent) are put in a container at the same time, after being stirred uniformly by manpower, the uniformly stirred mixture is conveyed to a granulating device through conveying equipment to be thermally dissolved, sheared, cooled and dried to be made into mixed colloidal particles, and finally the mixed colloidal particles are heated, stretched and cooled through casting film-making equipment to be made into the breathable film. However, the traditional process usually requires granulating the mixture by granulating equipment, the process is complex, and a granulator needs to be added, so that the production cost is high; simultaneously, the raw materials are stirred manually, which is laborious and can not ensure the consistency of the proportion of each raw material supply, thereby affecting the quality of the breathable film.
Therefore, the problem to be solved by those skilled in the art is how to provide a production device and a process for preparing a breathable film by a one-step method, which does not need granulation and saves production cost.
Disclosure of Invention
In view of the above, the invention provides production equipment and a production process for preparing the breathable film by a one-step method, which do not need granulation and save production cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
a production facility of ventilated membrane of one-step preparation includes:
a machine frame, a plurality of guide rails and a plurality of guide rails,
the collecting hopper is fixedly arranged on the rack, the upper end of the collecting hopper is a feeding port, and the lower end of the collecting hopper is a first discharging port;
the internal mixing drum on the double-rotor continuous internal mixer is fixedly arranged on the rack and is positioned below the aggregate hopper, a first material receiving port and a second material outlet are formed in the internal mixing drum, and the first material receiving port is communicated with the first material outlet;
the casting screw cylinder on the casting machine is arranged on the frame through a support frame, a second material receiving port is formed in the casting screw cylinder, and the second material receiving port is communicated with the second material outlet through a pipeline; the tail end of the casting screw cylinder is connected with a casting die.
According to the technical scheme, compared with the prior art, the production equipment for preparing the breathable film by the one-step method is provided, the raw materials can be fully and uniformly mixed and preliminarily plasticized by stirring of the internal mixing cylinder, and continuously enter the casting screw cylinder for film preparation in a semi-molten state in the mixing motion to be heated and further plasticized, so that the low-temperature mixing plasticizing effect of the raw materials is better, the coke phenomenon in the casting screw cylinder and a casting die can be reduced, the granulation link is reduced, and the cost is saved.
In order to optimize the above technical solution, the method further comprises:
the feeding bin is arranged at the top of the rack;
the weightlessness scale is fixedly arranged on the rack and arranged between the feeding bin and the collecting hopper, the top of the weightlessness scale is communicated with the lower end of the feeding bin, and the bottom of the weightlessness scale is communicated with the feeding port.
The beneficial effects that adopt above-mentioned technical scheme to produce are that, with each raw materials entering banburying section of thick bamboo after weighing through weightless balance respectively, the ratio of each raw materials can accurate control, improves its membrane quality, can avoid artifical measurement to appear inaccurate pan feeding to can alleviate the labour.
In order to optimize the technical scheme, a single screw or parallel double screws for extruding materials are arranged in the casting screw cylinder along the length direction of the casting screw cylinder; the casting machine further comprises: and the driving part is used for driving the single screw or the parallel double screws, and the single screw or the parallel double screws are fixedly connected with the driving end of the driving part.
In order to optimize the above technical solution, the driving part includes:
the motor is fixedly arranged on the rack;
the speed reducer is fixedly installed on the rack, an input shaft of the speed reducer is connected with an output shaft of the motor through a coupler, and the output shaft of the speed reducer is fixedly connected with the single screw or the parallel double screws.
In order to optimize the above technical solution, the method further comprises: the outlet of the stirrer is communicated with the feeding port through a conveying pipeline.
Adopt the beneficial effect that above-mentioned technical scheme produced to be, earlier with the raw materials through the mixer stirring back reentrant birotor continuous honey smelt the stirring again for the raw materials carries out high-speed continuous stirring, and the stirring is more even, improves the membrane quality.
The invention also provides a production process for preparing the breathable film by the one-step method, which comprises the following steps:
step one, raw material preparation: weighing 48-50 parts of polyethylene, 48-50 parts of calcium carbonate and 2-4 parts of auxiliary agent according to the weight ratio for later use;
step two, heating the equipment, and respectively heating an internal mixing cylinder on the double-rotor continuous internal mixer and a casting screw cylinder on the casting machine by heat preservation, and preserving heat for later use;
step three, banburying, stirring and plasticizing: feeding 48-50 parts of polyethylene, 48-50 parts of calcium carbonate and 2-4 parts of auxiliary agent into an internal mixing drum through a collecting hopper for banburying, stirring and plasticizing, and performing preliminary plasticizing to obtain a mixture in a semi-molten state;
step four, tape casting plasticization: the mixture in the third step is plasticized again through a casting screw cylinder to obtain a mixture in a molten state, and the mixture is extruded through a casting die;
step five, post-treatment: and embossing and cooling the mixture extruded by the casting die into a casting film thick sheet through a casting steel roller and a rubber roller, stretching the casting film thick sheet through a stretching roller after preheating the casting film thick sheet through a preheating roller, trimming and winding after heat setting, cold setting and corona spark treatment, and finally producing a breathable film finished product.
In order to optimize the technical scheme, in the second step, the temperature of the internal mixing cylinder is 160-190 degrees, the heat preservation time is 0.5h, the temperature of the casting screw cylinder is 160-230 degrees, and the heat preservation time is 0.5 h.
In order to optimize the technical scheme, the stirring speed in the third step is 600-650 r/min.
In order to optimize the technical scheme, in the third step, before feeding 48-50 parts of polyethylene, 48-50 parts of calcium carbonate and 2-4 parts of an auxiliary agent into an internal mixer through a collecting hopper for internal mixing, stirring and plasticizing, the method further comprises the following steps:
and respectively feeding 48-50 parts of polyethylene, 48-50 parts of calcium carbonate and 2-4 parts of auxiliary agent into a collecting hopper after respectively measuring through a material supplementing bin and a weight loss scale.
In order to optimize the technical scheme, in the third step, before feeding 48-50 parts of polyethylene, 48-50 parts of calcium carbonate and 2-4 parts of an auxiliary agent into an internal mixer through a collecting hopper for internal mixing, stirring and plasticizing, the method further comprises the following steps:
and stirring and mixing 48-50 parts of polyethylene, 48-50 parts of calcium carbonate and 2-4 parts of auxiliary agent by a stirrer, and then feeding into a collecting hopper.
According to the technical scheme, compared with the prior art, the production process for preparing the breathable film by the one-step method is disclosed, compared with the traditional process, the granulation process is not needed, the labor and the cost are saved, the raw materials can be accurately metered, and the quality of the produced breathable film product is good.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a production facility for preparing a breathable film by a one-step method provided by the invention.
FIG. 2 is a schematic drawing showing the structure of parallel twin screws in a casting screw drum.
FIG. 3 is a schematic structural diagram of another production facility for preparing breathable films by a one-step method provided by the invention.
Wherein: 1-frame, 2-aggregate bin, 21-feeding port, 22-first discharging port, 3-double-rotor continuous internal mixer, 31-internal mixing cylinder, 311-first receiving port, 312-second discharging port, 4-casting machine, 41-casting screw cylinder, 411-second receiving port, 42-support frame, 43-casting die, 44-parallel double screw, 45-driving part, 451-motor, 452-speed reducer, 5-feeding bin, 6-weightlessness scale, 7-stirrer and 8-conveying pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses production equipment for preparing a breathable film by a one-step method, which comprises the following steps:
the machine frame (1) is provided with a frame,
the collecting hopper 2 is fixedly arranged on the frame 1, the upper end of the collecting hopper 2 is a
the double-rotor continuous internal mixer 3 is characterized in that an
the
Some embodiments of the invention further comprise:
the material supplementing bin 5 is arranged at the top of the rack 1;
the weight loss scale 6 is fixedly arranged on the frame 1 and is arranged between the material feeding bin 5 and the material collecting bin 2, the top of the weight loss scale 6 is communicated with the lower end of the material feeding bin 5, and the bottom of the weight loss scale 6 is communicated with the
A single screw or parallel twin screws 44 for extruding the material are provided inside the
The driving section 45 includes:
the motor 451, the motor 451 is fixedly arranged on the frame 1;
the speed reducer 452 is fixedly mounted on the frame 1, an input shaft of the speed reducer 452 is connected with an output shaft of the motor 451 through a coupling, and an output shaft of the speed reducer 452 is fixedly connected with the single screw or the parallel double screws 44.
It should be noted that the driving portion may also be one or more combinations of belt transmission, chain transmission and gear transmission.
Some embodiments of the invention further comprise: the outlet of the stirrer 7 is communicated with the
A production process for preparing a breathable film by a one-step method comprises the following steps:
step one, raw material preparation: weighing 48-50 parts of polyethylene, 48-50 parts of calcium carbonate and 2-4 parts of auxiliary agent according to the weight ratio for later use;
step two, equipment temperature rise and heat preservation: respectively heating the internal mixing cylinder to 160-190 ℃ and keeping the temperature for 0.5h, and heating the casting screw cylinder to 160-230 ℃ and keeping the temperature for 0.5h for later use;
step three, banburying, stirring and plasticizing: 48-50 parts of polyethylene, 48-50 parts of calcium carbonate and 2-4 parts of auxiliary agent are fed into an internal mixing cylinder through a collecting hopper to be subjected to internal mixing, stirring and plasticizing, wherein the stirring speed is 600-;
step four, tape casting plasticization: the mixture in the third step is plasticized again through a casting screw cylinder to obtain a mixture in a molten state, and the mixture is extruded through a casting die;
step five, post-treatment: and embossing and cooling the mixture extruded by the casting die into a casting film thick sheet through a casting steel roller and a rubber roller, stretching the casting film thick sheet through a stretching roller after preheating the casting film thick sheet through a preheating roller, trimming and winding after heat setting, cold setting and corona spark treatment, and finally producing a breathable film finished product.
In the third step, 48-50 parts of polyethylene, 48-50 parts of calcium carbonate and 2-4 parts of auxiliary agent are fed into an internal mixer through a collecting hopper and further comprise the following steps before internal mixing and plasticizing:
48-50 parts of polyethylene, 48-50 parts of calcium carbonate and 2-4 parts of auxiliary agent are respectively weighed by a material supplementing bin and a weight loss scale, and then are respectively fed into a material collecting hopper.
In another embodiment of the invention, in the third step, before feeding 48-50 parts of polyethylene, 48-50 parts of calcium carbonate and 2-4 parts of an auxiliary agent into an internal mixer through a collecting hopper for internal mixing, stirring and plasticizing, the method further comprises the following steps:
48-50 parts of polyethylene, 48-50 parts of calcium carbonate and 2-4 parts of auxiliary agent are stirred and mixed by a stirrer and then are sent into a collecting hopper.
Compared with the traditional equipment and process, the production equipment and process for preparing the breathable film by the one-step method provided by the invention have the advantages that a granulation process is not needed, manual stirring and metering are replaced by a weightless scale or a stirrer, the manpower and the electric power are saved, the produced breathable film has fewer crystal points, fewer holes and more uniform air permeability, and various physical performance indexes of the film, such as tensile strength, elongation, flexibility and the like, are correspondingly improved.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
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