CN114516970B - Aluminized-grade cast polypropylene film - Google Patents
Aluminized-grade cast polypropylene film Download PDFInfo
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- CN114516970B CN114516970B CN202210157880.8A CN202210157880A CN114516970B CN 114516970 B CN114516970 B CN 114516970B CN 202210157880 A CN202210157880 A CN 202210157880A CN 114516970 B CN114516970 B CN 114516970B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H18/00—Winding webs
- B65H18/02—Supporting web roll
- B65H18/028—Both ends type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H18/00—Winding webs
- B65H18/08—Web-winding mechanisms
- B65H18/14—Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/26—Registering, tensioning, smoothing or guiding webs longitudinally by transverse stationary or adjustable bars or rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H26/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
- B65H35/02—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with longitudinal slitters or perforators
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/12—Chemical modification
- C08J7/123—Treatment by wave energy or particle radiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
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- Polymers & Plastics (AREA)
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- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of preparation of cast polypropylene films, and discloses an aluminized-grade cast polypropylene film; the modified polypropylene composite material is prepared from the following components, by weight, 120-160 parts of polypropylene, 2-4 parts of an antioxidant, 3-5 parts of a dispersing agent, 1-3 parts of an antistatic agent, 1-2 parts of a stabilizer and 8-14 parts of mica powder filler; the preparation method comprises the following steps: weighing polypropylene, auxiliary additive and filler, putting into a stirring tank, stirring and mixing uniformly; putting the mixed materials into a double-screw extruder for extrusion granulation to obtain plastic particles, and controlling the temperature in the double-screw extruder to be 170-185 ℃; preparing plastic particles into a film by adopting a tape casting method, controlling the film forming temperature to be 190-220 ℃, and then carrying out spray cooling shaping; and carrying out surface corona treatment on the shaped film, trimming according to the width requirement of the film after corona treatment, carrying out tension adjustment on the trimmed film through a tension adjusting mechanism, and finally rolling.
Description
Technical Field
The invention relates to the technical field of preparation of cast polypropylene films, and particularly discloses an aluminized-grade cast polypropylene film.
Background
The cast polypropylene film is a polypropylene film produced by adopting a casting process, can be divided into a general CPP film, an aluminized CPP film and a cooking CPP film, has excellent effects of good transparency, uniform thickness, uniform longitudinal and transverse performances and the like, and is generally used as an inner layer material of the composite film. The thickness of the common CPP film is generally between 25 and 50 mu m, the transparency is better after the common CPP film is compounded with OPP, the surface is bright, the hand feeling is firm, and the common gift packaging bag adopts the material; the thickness of the boiling CPP film is generally between 60 and 80 mu m, the boiling CPP film can resist high-temperature boiling at 121 ℃ for 30min, has better oil resistance and air tightness and higher heat sealing strength, and the boiling CPP film is adopted as the inner layer of the common meat package. The existing aluminized cast polypropylene film is restricted by the existing equipment in the manufacturing process, and tension of the polypropylene film in the winding and traction process cannot be accurately controlled, so that the thickness of the prepared polypropylene film cannot be accurately controlled, and a series of poor performances are caused by uneven thickness of the polypropylene film.
The invention patent with the application of CN2020110721242 discloses a polypropylene capacitor film production device, which comprises a frame, guide rollers, a clamping mechanism, a storage roller and a vertical frame, wherein a rotating rod penetrates through one side of the vertical frame, one end of the outer side of the rotating rod is fixedly provided with a rotating disc, one end of the rotating rod, which is away from the rotating disc, is fixedly provided with a first bevel gear, the top end of the first bevel gear is meshed with a second bevel gear, the top end of the second bevel gear is fixedly provided with a screw rod, the top end of the screw rod is rotatably provided with an internal thread pipe, the top end of the internal thread pipe is fixedly provided with a connecting plate, two sides of the top end of the connecting plate are symmetrically fixedly provided with supporting rods, cutter rollers are fixedly arranged at the top ends between the two supporting rods, annular cutting cutters are uniformly rotated outside the cutter rollers, two ends of the cutter rollers are fixedly provided with limiting sliding blocks, and two top ends inside the vertical frame are provided with limiting sliding grooves; the polypropylene capacitor film production device disclosed by the invention can not realize the accurate control of the film tension before winding in the production process of the cast polypropylene film, and the thickness of the prepared cast polypropylene film is easily uneven, so that the effect of the aluminum-plated cast polypropylene film can not be achieved. Therefore, in order to overcome the defects of the existing equipment for producing propylene films, the application provides an aluminized cast polypropylene film capable of effectively solving the technical problems, and a preparation process and a preparation device thereof.
Disclosure of Invention
The invention aims at overcoming the defects of the prior equipment for producing the propylene film, and provides an aluminized-grade cast polypropylene film, a preparation process and a preparation device.
The invention is realized by the following technical scheme:
a preparation process of an aluminized-grade cast polypropylene film comprises the following steps:
1) Weighing polypropylene, auxiliary additive and filler, putting into a stirring tank, stirring and mixing uniformly;
2) Putting the mixed materials into a double-screw extruder for extrusion granulation to obtain plastic particles, and controlling the temperature in the double-screw extruder to be 170-185 ℃;
3) Preparing plastic particles into a film by adopting a tape casting method, controlling the film forming temperature to be 190-220 ℃, and then carrying out spray cooling shaping;
4) And carrying out surface corona treatment on the shaped film, trimming according to the width requirement of the film after corona treatment, carrying out tension adjustment on the trimmed film through a tension adjusting mechanism, and finally rolling.
Preferably, the film winding speed is 400-880cm/min.
The device is equipment used in the step 4 and comprises a U-shaped frame, a corona treatment device, a trimming device, a tension adjusting mechanism and a winding device, wherein the corona treatment device, the trimming device and the tension adjusting mechanism are sequentially arranged in the U-shaped frame from left to right, and the winding device is arranged on the right side of the U-shaped frame;
the corona treatment device comprises a treatment machine box, wherein a feed inlet and a discharge outlet are respectively formed in the upper ends of the left side surface and the right side surface of the treatment machine box, a row of carrier rollers are arranged in the treatment machine box at the same horizontal position of the feed inlet and the discharge outlet, a corona frame is arranged in the treatment machine box above the carrier rollers, a plurality of corona rollers are arranged on the corona frame at equal intervals, and a control main machine box is arranged on the upper surface of the treatment machine box;
the trimming device comprises a longitudinal beam arranged at the upper end of a U-shaped frame, a strip-shaped groove is formed in the lower surface of the longitudinal beam, a bidirectional screw rod is rotatably arranged in the strip-shaped groove, a hand wheel connected with the end part of the bidirectional screw rod is arranged on the front side surface of the longitudinal beam, two moving blocks matched with the strip-shaped groove are arranged in the strip-shaped groove in a mirror symmetry mode, threaded holes matched with the bidirectional screw rod are formed in the two moving blocks, a cutter holder is fixedly arranged on the lower surface of each moving block, and trimming blades are arranged in the cutter holders;
the tension adjusting mechanism comprises a portal frame fixed in a U-shaped frame, vertical sliding grooves are formed in opposite faces of a front vertical bar and a rear vertical bar of the portal frame, an electromagnet is arranged at the bottom end of each vertical sliding groove, a force sensor is arranged at the top end of each vertical sliding groove, a vertical downward guide rod is fixedly connected to each force sensor, a limiting block is arranged at the lower end of each guide rod, a spring sleeved on each guide rod is connected to each force sensor, a movable block is connected to the lower end of each spring, through holes matched with the guide rods are formed in the movable blocks, annular permanent magnets are arranged on the lower surfaces of the movable blocks, bearings are arranged on opposite faces of the two movable blocks, and a suspension roller is rotatably connected between the two bearings;
the winding device comprises a bottom plate and a vertical seat arranged at one end of the bottom plate, a round carrier plate is rotationally connected to the vertical seat, a driving device used for driving the round carrier plate to rotate is arranged on the vertical seat, a plurality of inflatable shafts are rotationally connected to the outer edge of the round carrier plate in an annular array shape, swing arms are rotationally connected to the two inner walls of the right end of the U-shaped frame, a transmission rubber roller is rotationally connected between the upper ends of the two swing arms, one of the swing arms is provided with a winding motor used for driving the rubber roller to rotate, a telescopic device is movably connected to the two inner walls of the right end of the U-shaped frame, and the movable end of the telescopic device is movably connected with the swing arms.
As a further arrangement of the scheme, the front side surface of the U-shaped rack is also provided with a control cabinet, and a control module and a switch assembly are arranged in the control cabinet.
As a further setting of the scheme, the U-shaped frames positioned at the left side and the right side below the trimming device are respectively provided with a first guide roller, the U-shaped frames positioned at the left side of the processor case are respectively provided with a second guide roller, and the U-shaped frames positioned at the left side and the right side of the tension adjusting mechanism are respectively provided with a third guide roller.
As the specific arrangement of the scheme, the number of the corona rollers arranged on the corona frame is not less than four.
As the specific setting of above-mentioned scheme, the gas expansion axle that rotates on the circular support plate and connect is 3~ 6.
As a specific setting of the scheme, the driving device comprises a reduction gear box and a driving motor, wherein an output shaft of the driving motor is connected with the reduction gear box, and an output shaft of the reduction gear box is connected with the circular carrier plate.
As a specific setting of the scheme, the telescopic device is one of a hydraulic telescopic rod and a cylinder.
The aluminized cast polypropylene film is prepared from the following components, by weight, 120-160 parts of polypropylene, 2-4 parts of an antioxidant, 3-5 parts of a dispersing agent, 1-3 parts of an antistatic agent, 1-2 parts of a stabilizer and 8-14 parts of mica powder filler.
The beneficial effects are that:
1) According to the preparation device of the aluminized cast polypropylene film, disclosed by the invention, the tension of the film is judged by measuring the thickness of the film before rolling through the tension regulating device, and then the electromagnet and the annular permanent magnet below the moving block are subjected to the attraction or repulsion action by introducing currents in different directions into the electromagnet, so that the height position of the suspension roller in the portal frame can be regulated, the tension regulation effect is realized, meanwhile, the acting force applied to the suspension roller is monitored in real time through the force sensor, then the current in the electromagnet is regulated, and the position of the suspension roller is accurately regulated, so that the accurate regulation of the traction film tension is realized, the structural design is ingenious, the accuracy of film tension regulation is high, the uniformity of the prepared film is effectively ensured, and the production requirement of the aluminized cast polypropylene film can be met.
2) According to the preparation device disclosed by the invention, the hand wheel can be rotated by means according to the width requirements of different clients on the film, and then the two moving blocks synchronously approach or depart from a circle under the action of the self threaded holes and the bidirectional screw rod, so that the distance between the two edge lifting blades is adjusted, the process of edge-cutting treatment on the film according to the requirements of the clients can be achieved, the whole operation and adjustment process is simple, and the use effect is excellent.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of the steps of the preparation process of the present invention;
FIG. 2 is a schematic view of a first angular perspective of the whole device of the present invention;
FIG. 3 is a schematic view of a second angular perspective of the entire apparatus of the present invention;
FIG. 4 is a schematic view of the internal plan view structure of the present invention;
FIG. 5 is a schematic view of the internal plan structure of a corona treatment device in accordance with the present invention;
FIG. 6 is a schematic perspective view of a trimming device according to the present invention;
FIG. 7 is a schematic view of the three-dimensional structure of the moving block, the tool holder, the trimming blade, etc. in the present invention;
FIG. 8 is a schematic perspective view of a tension adjusting mechanism according to the present invention;
FIG. 9 is a schematic perspective view of a guide rod, movable block, suspension roller, etc. in the present invention;
FIG. 10 is a schematic perspective view of a winding device according to the present invention;
fig. 11 is a schematic perspective view of a swing arm, a transmission rubber, a telescopic device and the like in the invention.
Wherein:
1-U-shaped frame, 101-first guide roller, 102-second guide roller, 103-third guide roller;
2-corona treatment device, 201-processor box, 202-carrier roller, 203-corona rack, 204-corona roller and 205-control main box;
3-edge cutting devices, 301-longitudinal beams, 302-strip-shaped grooves, 303-bidirectional lead screws, 304-handwheels, 305-moving blocks, 306-tool holders and 307-edge cutting blades;
the device comprises a 4-tension adjusting mechanism, a 401-portal frame, a 402-vertical chute, a 403-electromagnet, a 404-force sensor, a 405-guide rod, a 406-limiting block, a 407-spring, a 408-movable block, a 409-annular permanent magnet, a 410-bearing and a 411-suspension roller;
5-winding device, 501-bottom plate, 502-vertical seat, 503-round carrier plate, 504-driving device, 5041-reduction gear box, 5042-driving motor, 505-air expansion shaft, 506-swing arm, 507-transmission rubber roller, 508-winding motor and 509-telescoping device;
6-a control cabinet.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. An aluminized cast polypropylene film disclosed in the present application will be described in detail with reference to fig. 1 to 11, and examples.
Example 1
This example 1 discloses an aluminized-grade cast polypropylene film and a preparation process, the aluminized-grade cast polypropylene film comprises 145kg of polypropylene, 2.5kg of antioxidant, 3.2kg of dispersing agent, 2.2kg of antistatic agent, 1.4kg of stabilizer and 12kg of mica powder filler.
The preparation method comprises the following steps:
step one: respectively weighing polypropylene, auxiliary additive and filler according to the weight, and putting the polypropylene, the auxiliary additive and the filler into a stirring tank for stirring and mixing uniformly;
step two: putting the mixed materials into a double-screw extruder for extrusion granulation to obtain plastic particles, and controlling the temperature in the double-screw extruder within 182 ℃;
step three: preparing plastic particles into a film by adopting a tape casting method, controlling the film-making temperature within a range of 196 ℃, and then carrying out spray cooling shaping;
step four: carrying out surface corona treatment on the shaped film, carrying out trimming according to the film width requirement after corona treatment, carrying out tension adjustment on the trimmed film through a tension adjusting mechanism, and finally carrying out winding, wherein the winding speed of the film is controlled to be 560cm/min.
Wherein, the antioxidant is diphenylamine, the dispersing agent is polystyrene, the antistatic agent is sodium alkyl sulfonate, and the stabilizer is magnesium stearate.
Example 2
This example 2 discloses an aluminized-grade cast polypropylene film and a preparation process, the aluminized-grade cast polypropylene film comprises 122kg of polypropylene, 2.2kg of antioxidant, 3.0kg of dispersing agent, 1.8kg of antistatic agent, 1.2kg of stabilizer and 9.6kg of mica powder filler.
The preparation method comprises the following steps:
step one: respectively weighing polypropylene, auxiliary additive and filler according to the weight, and putting the polypropylene, the auxiliary additive and the filler into a stirring tank for stirring and mixing uniformly;
step two: putting the mixed materials into a double-screw extruder for extrusion granulation to obtain plastic particles, and controlling the temperature in the double-screw extruder within a range of 178 ℃;
step three: preparing plastic particles into a film by adopting a tape casting method, controlling the film-making temperature within a range of 196 ℃, and then carrying out spray cooling shaping;
step four: carrying out surface corona treatment on the shaped film, carrying out trimming according to the film width requirement after corona treatment, carrying out tension adjustment on the trimmed film through a tension adjusting mechanism, and finally carrying out winding, wherein the speed of film winding is controlled to be 440cm/min.
Wherein, the antioxidant is diphenylamine, the dispersing agent is polystyrene, the antistatic agent is sodium alkyl sulfonate, and the stabilizer is magnesium stearate.
Example 3
This example 3 discloses an aluminized-grade cast polypropylene film and a preparation process, the aluminized-grade cast polypropylene film comprises the following components by weight of 158kg of polypropylene, 3.2kg of antioxidant, 4.6kg of dispersing agent, 2.9kg of antistatic agent, 1.8kg of stabilizer and 13.6kg of mica powder filler.
The preparation method comprises the following steps:
step one: respectively weighing polypropylene, auxiliary additive and filler according to the weight, and putting the polypropylene, the auxiliary additive and the filler into a stirring tank for stirring and mixing uniformly;
step two: putting the mixed materials into a double-screw extruder for extrusion granulation to obtain plastic particles, and controlling the temperature in the double-screw extruder within the range of 184 ℃;
step three: preparing plastic particles into a film by adopting a tape casting method, controlling the film-making temperature within a range of 198 ℃, and then carrying out spray cooling shaping;
step four: carrying out surface corona treatment on the shaped film, carrying out trimming according to the film width requirement after corona treatment, carrying out tension adjustment on the trimmed film through a tension adjusting mechanism, and finally carrying out winding, wherein the speed of winding the film is controlled to be 620cm/min.
Wherein, the antioxidant is diphenylamine, the dispersing agent is polystyrene, the antistatic agent is sodium alkyl sulfonate, and the stabilizer is magnesium stearate.
According to the preparation process of the aluminum-plated cast polypropylene film, various additives are mixed with polypropylene for granulation, the film is prepared by using a casting method after granulation, and the tension of the film during winding is accurately regulated in the traction winding process, so that the thickness of the prepared aluminum-plated cast polypropylene film can be effectively ensured to be accurately controlled, and the film thickness is more uniform.
Example 4
A preparation device for an aluminized cast polypropylene film in examples 1-3, referring to fig. 2, 3 and 4, comprises a U-shaped frame 1, a corona treatment device 2, a trimming device 3, a tension adjusting mechanism 4 and a winding device 5. Wherein, corona treatment device 2, side cut device 3, tension adjustment mechanism 4 set gradually in U type frame 1 from left to right, and coiling mechanism 5 sets up the right side at U type frame 1.
Referring to fig. 5, the corona treatment device 2 includes a treatment box 201, a feed inlet and a discharge outlet are respectively formed at upper ends of left and right sides of the treatment box 201, a row of carrier rollers 202 are arranged in the treatment box 201 at the same horizontal position of the feed inlet and the discharge outlet, a corona frame 203 is arranged in the treatment box 201 above the carrier rollers 202, a plurality of corona rollers 204 are arranged on the corona frame 203 at equal intervals, and the number of the corona rollers 204 is not less than four when the corona rollers 204 are specifically arranged. The upper surface of the processor chassis 201 is provided with a control main chassis 205. In addition, a second guide roller 102 is also arranged in the U-shaped frame 1 positioned at the left side of the processing machine box 201, and the film with a thick shaping side enters the processing machine box 201 through the second guide roller 102 and is subjected to surface treatment by the action of a corona roller 204 in the process of conveying along the carrier roller 202 in the interior, so that the surface activity of the film is enhanced.
Referring to fig. 6 and 7, the trimming device 3 includes a longitudinal beam 301 disposed at an upper end of the U-shaped frame 1, a bar-shaped groove 302 is formed in a lower surface of the longitudinal beam 301, a bi-directional screw 303 is rotatably disposed in the bar-shaped groove 302, and a hand wheel 304 connected to an end of the bi-directional screw 303 is disposed on a front side of the longitudinal beam 301. Two moving blocks 305 matched with the strip-shaped groove are arranged in the strip-shaped groove 302 in a mirror symmetry mode, threaded holes matched with the bidirectional screw rod 303 are formed in the two moving blocks 305, a tool apron 306 is fixedly arranged on the lower surface of each moving block 305, and a trimming blade 307 is arranged in the tool apron 306. Meanwhile, first guide rollers 101 are arranged in the U-shaped frames 1 positioned on the left and right sides below the edge cutting device 3, and when the film subjected to surface treatment is fed into a space between the two first guide rollers 101 from a discharge hole, edge cutting treatment is performed by two edge cutting blades 307. In addition, the operator can rotate the hand wheel according to the needs of the customer, and then the two moving blocks 305 are mutually close to or far away from each other under the action of the self threaded holes and the bidirectional screw rod 303, so that the trimming width adjustment of the film can be realized.
Referring to fig. 8 and 9, the tension adjusting mechanism 4 includes a gantry 401 fixed in the U-shaped frame 1, and vertical sliding grooves 402 are formed in opposite surfaces of front and rear vertical bars of the gantry 401. An electromagnet 403 is arranged at the bottom end of the vertical chute 402, and a force sensor 404 is arranged at the top end of the vertical chute 402. The force sensor 404 is fixedly connected with a vertical downward guide rod 405, the lower end of the guide rod 405 is provided with a limiting block 406, the force sensor 404 is connected with a spring 407 sleeved on the guide rod 405, the lower end of the spring 407 is connected with a movable block 408, and the movable block 408 is provided with a through hole matched with the guide rod 405. An annular permanent magnet 409 is provided on the lower surface of the movable block 408, and the annular permanent magnet 409 is on the same vertical line as the force sensor 404. Bearings 410 are provided on opposite surfaces of the two movable blocks 408, and a levitation roll 411 is rotatably connected between the two bearings 410, and further, third guide rolls 103 are provided in the U-shaped frame 1 located on both left and right sides of the tension adjusting mechanism 4. According to the tension adjusting mechanism 4 disclosed by the invention, the thickness of the front end film is measured through the thickness gauge, when the thickness of the film is found to be too thick, the tension of the film during traction is too small, at the moment, the electromagnet 403 is electrified to generate a magnetic pole communicated with the lower surface of the annular permanent magnet 409, then the whole suspension roller 411 moves upwards against the gravity and the acting force of the spring 407 under the action of opposite repulsion, so that the tension of the film during winding is increased, and the tension can be adjusted by controlling the current fed into the electromagnet 403. In contrast, when the thickness of the front end film is measured by the thickness gauge, if the thickness of the film is found to be too thin, the tension of the film during traction is too high, and at this time, a reverse current may be applied to the electromagnet 403 or the current applied to the electromagnet 403 may be reduced, so that the levitation roll 411 moves downward, thereby reducing the tension during film winding.
Referring to fig. 10 and 11, the winding device 5 includes a bottom plate 501 and a stand 502 disposed at one end of the bottom plate 501, a circular carrier 503 is rotatably connected to the stand 502, a driving device 504 for driving the circular carrier 503 to rotate is disposed on the stand 502, the driving device 504 includes a reduction gear box 5041 and a driving motor 5042 when specifically disposed, an output shaft of the driving motor 5042 is connected with the reduction gear box 5041, and an output shaft of the reduction gear box 5041 is connected with the circular carrier 503. The outer edge of the circular carrier plate 503 is in an annular array shape and is rotationally connected with a plurality of air expansion shafts 505, and 3-6 air expansion shafts 505 are rotationally connected on the circular carrier plate 503 during specific setting. Swing arms 506 are rotatably connected to two inner walls of the right end of the U-shaped frame 1, a transmission rubber roller 507 is rotatably connected between the upper ends of the two swing arms 506, a winding motor 508 used for driving the rubber roller 507 to rotate is arranged at the upper end of one swing arm 506, a telescopic device 509 is movably connected to two inner walls of the right end of the U-shaped frame 1, one of a hydraulic telescopic rod or a cylinder can be selected as the telescopic device 509, and the movable end of the telescopic device 509 is movably connected with the swing arm 506. When the film is wound by the winding device 5, the circular carrier plate 503 can be controlled by the driving device 504 to rotate at a fixed angle to switch the air expansion shaft 505, meanwhile, the swing arm 506 is pressed down by the telescopic device 509 to press the transmission rubber roller 507 on the air expansion shaft 505 of the winding station, the film is wound by the friction transmission function of the transmission rubber roller 507 on the air expansion shaft 505,
finally, the invention is also provided with a control cabinet 6 on the front side of the U-shaped frame 1, a control module and a switch assembly are arranged in the control cabinet 6, wherein the control module is electrically connected with a force sensor 404 and an electromagnet 403 in the tension adjusting mechanism 4, and the switch assembly is used for controlling the start and stop of other electrical elements.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (3)
1. A preparation process of an aluminized-grade cast polypropylene film comprises the following steps: 1) Weighing polypropylene, auxiliary additive and filler, putting into a stirring tank, stirring and mixing uniformly; 2) Putting the mixed materials into a double-screw extruder for extrusion granulation to obtain plastic particles, and controlling the temperature in the double-screw extruder to be 170-185 ℃; 3) Preparing plastic particles into a film by adopting a tape casting method, controlling the film forming temperature to be 190-220 ℃, and then carrying out spray cooling shaping; 4) Carrying out surface corona treatment on the shaped film, trimming according to the width requirement of the film after corona treatment, carrying out tension adjustment on the trimmed film through a tension adjustment mechanism, and finally rolling;
the preparation process is characterized in that the preparation process is implemented by adopting a preparation device of an aluminum-plated cast polypropylene film, and comprises a U-shaped frame (1), a corona treatment device (2), a trimming device (3), a tension adjusting mechanism (4) and a winding device (5), wherein the corona treatment device (2), the trimming device (3) and the tension adjusting mechanism (4) are sequentially arranged in the U-shaped frame (1) from left to right, and the winding device (5) is arranged on the right side of the U-shaped frame (1);
the corona treatment device (2) comprises a treatment machine box (201), wherein a feed inlet and a discharge outlet are respectively formed in the upper ends of the left side surface and the right side surface of the treatment machine box (201), a row of carrier rollers (202) are arranged in the treatment machine box (201) positioned at the same horizontal position of the feed inlet and the discharge outlet, a corona frame (203) is arranged in the treatment machine box (201) positioned above the carrier rollers (202), and a plurality of corona rollers (204) are arranged on the corona frame (203) at equal intervals; the upper surface of the processor box (201) is provided with a control main box (205); a second guide roller (102) is arranged in the U-shaped frame (1) positioned at the left side of the processing machine box (201), the shaped film enters the processing machine box (201) through the second guide roller (102), and is subjected to surface treatment under the action of a corona roller (204) in the process of conveying along a carrier roller (202) in the interior, so that the surface activity of the film is enhanced;
the trimming device (3) comprises a longitudinal beam (301) arranged at the upper end of the U-shaped frame (1), a strip-shaped groove (302) is formed in the lower surface of the longitudinal beam (301), a bidirectional screw rod (303) is rotationally arranged in the strip-shaped groove (302), and a hand wheel (304) connected with the end part of the bidirectional screw rod (303) is arranged on the front side surface of the longitudinal beam (301); two moving blocks (305) matched with the strip-shaped groove are arranged in the strip-shaped groove (302) in a mirror symmetry mode, threaded holes matched with the bidirectional screw rod (303) are formed in the two moving blocks (305), a cutter holder (306) is fixedly arranged on the lower surface of each moving block (305), and a trimming blade (307) is arranged in each cutter holder (306); the U-shaped frames (1) positioned at the left side and the right side below the edge cutting device (3) are respectively provided with a first guide roller (101), and when the film subjected to surface treatment enters between the two first guide rollers (101) from the discharge hole, the film is subjected to edge cutting treatment by the two edge cutting blades (307); by rotating the hand wheel (304), the two moving blocks (305) are mutually close to or far away from each other under the action of the self threaded hole and the bidirectional screw rod (303), and the trimming width adjustment of the film can be realized;
the tension adjusting mechanism (4) comprises a portal frame (401) fixed in the U-shaped frame (1), and vertical sliding grooves (402) are formed in the opposite surfaces of the front vertical bar and the rear vertical bar of the portal frame (401); an electromagnet (403) is arranged at the bottom end of the vertical chute (402), and a force sensor (404) is arranged at the top end of the vertical chute (402); a vertical downward guide rod (405) is fixedly connected to the force sensor (404), a limiting block (406) is arranged at the lower end of the guide rod (405), a spring (407) sleeved on the guide rod (405) is connected to the force sensor (404), and a movable block (408) is connected to the lower end of the spring (407); the movable block (408) is provided with a through hole matched with the guide rod (405); the lower surface of the movable block (408) is provided with an annular permanent magnet (409), and the annular permanent magnet (409) and the force sensor (404) are positioned on the same vertical line; the opposite surfaces of the two movable blocks (408) are respectively provided with a bearing (410), a suspension roller (411) is rotatably connected between the two bearings (410), and a third guide roller (103) is also arranged in the U-shaped frame (1) positioned at the left side and the right side of the tension adjusting mechanism (4);
the winding device (5) comprises a bottom plate (501) and a vertical seat (502) arranged at one end of the bottom plate (501), a circular carrier plate (503) is rotatably connected to the vertical seat (502), a driving device (504) for driving the circular carrier plate (503) to rotate is arranged on the vertical seat (502), the driving device (504) comprises a reduction gear box (5041) and a driving motor (5042), an output shaft of the driving motor (5042) is connected with the reduction gear box (5041), and an output shaft of the reduction gear box (5041) is connected with the circular carrier plate (503); the outer edge of the circular carrier plate (503) is in annular array shape and is rotationally connected with a plurality of inflatable shafts (505); swing arms (506) are rotatably connected to two inner walls at the right end of the U-shaped frame (1), transmission rubber rollers (507) are rotatably connected between the upper ends of the two swing arms (506), a winding motor (508) for driving the rubber rollers (507) to rotate is arranged at the upper end of one swing arm (506), a telescopic device (509) is movably connected to two inner walls at the right end of the U-shaped frame (1), and the movable end of the telescopic device (509) is movably connected with the swing arms (506).
2. The process for preparing an aluminized-grade cast polypropylene film according to claim 1, wherein the film is wound at a winding speed of 400-880cm/min.
3. The process for preparing the aluminized cast polypropylene film according to claim 1, wherein the aluminized cast polypropylene film is characterized by comprising, by weight, 120-160 parts of polypropylene, 2-4 parts of an antioxidant, 3-5 parts of a dispersing agent, 1-3 parts of an antistatic agent, 1-2 parts of a stabilizer and 8-14 parts of mica powder filler.
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| CN202210157880.8A CN114516970B (en) | 2022-02-21 | 2022-02-21 | Aluminized-grade cast polypropylene film |
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| CN202210157880.8A CN114516970B (en) | 2022-02-21 | 2022-02-21 | Aluminized-grade cast polypropylene film |
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| CN114516970B true CN114516970B (en) | 2023-07-18 |
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| JP2012086494A (en) * | 2010-10-21 | 2012-05-10 | Fujifilm Corp | Method and apparatus for manufacturing solvent-cast film |
| CN210884488U (en) * | 2019-11-12 | 2020-06-30 | 杭州美孚塑胶制品有限公司 | Novel rewinding machine |
| CN111497294A (en) * | 2020-04-20 | 2020-08-07 | 中山凤纪科技有限公司 | PP decorative film casting machine |
| CN112961438A (en) * | 2021-03-15 | 2021-06-15 | 江苏宗亮新材料有限公司 | Aluminum-plated cast polypropylene film material |
| CN113292790A (en) * | 2021-05-26 | 2021-08-24 | 潘秋 | CPP film and production process thereof |
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