CN109080219B - Composite processing technology of kraft paper packaging bag - Google Patents
Composite processing technology of kraft paper packaging bag Download PDFInfo
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- CN109080219B CN109080219B CN201810813977.3A CN201810813977A CN109080219B CN 109080219 B CN109080219 B CN 109080219B CN 201810813977 A CN201810813977 A CN 201810813977A CN 109080219 B CN109080219 B CN 109080219B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/74—Auxiliary operations
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the field of packaging bag manufacturing processes, and discloses a composite processing process of a kraft paper packaging bag, which comprises the following steps: A. unreeling; B. tackifying; C. preheating; D. performing composite treatment; E. cooling treatment; F. making bags; in order to solve the problems that the molten film is easy to fall off from the kraft paper, the unreeling needs to stay for a long time after the extrusion mechanism finishes the extrusion, and the efficiency of manufacturing the composite paper is lower in the prior art, the scheme carries out tackifying treatment on the surface of the kraft paper through a corona roller, and leads the surface of the kraft paper to be rougher through preheating treatment, so that the viscosity is further improved, and the molten film is prevented from falling off from the kraft paper; the rotary disc drives the extrusion mechanisms intermittently to extrude the kraft paper into the molten film continuously, so that the whole unreeling process is only stopped within a short time when the extrusion mechanisms are replaced by the rotary disc, the unreeling stop time is prevented from being too long, and the efficiency of manufacturing the composite paper is greatly improved.
Description
Technical Field
The invention relates to the field of packaging bag manufacturing processes, in particular to a composite processing process of a kraft paper packaging bag.
Background
At present, when a kraft paper packaging bag is manufactured, composite paper of kraft paper and a plastic film is generally required to be manufactured, then the manufactured composite paper is cut and pressed, and is discharged to a bag making machine for making a bag; however, in the above process, since the surface of the kraft paper is relatively smooth, the molten film is easy to fall off in the extrusion process, and after the extrusion mechanism finishes extruding the molten film once, the unwinding roller needs to be stopped for unwinding, the material needs to be supplemented to the extrusion mechanism, and the unwinding can be continued after the material supplementation is finished, so that the efficiency of manufacturing the composite paper is relatively low.
Disclosure of Invention
The invention aims to provide a composite processing technology of kraft paper packaging bags, which can increase the surface viscosity of kraft paper, continuously extrude a molten film to the kraft paper and improve the efficiency of manufacturing composite paper.
The composite processing technology of the kraft paper packaging bag comprises the following steps:
A. unreeling: unreeling kraft paper;
B. and (3) tackifying treatment: treating the surface of kraft paper by using a corona roller;
C. preheating treatment: preheating kraft paper after corona rolling the kraft paper, wherein the preheating temperature is 50-60 ℃;
D. performing composite treatment: intermittently rotating the turntable to enable the extrusion mechanisms to be intermittently opposite to the extrusion double-roller, enabling the distance between the machine head of each extrusion mechanism and the extrusion double-roller to be 50-150mm, extruding a molten film onto kraft paper by using the extrusion mechanisms, enabling the machine head temperature of each extrusion mechanism to be 280-320 ℃, stopping unwinding the kraft paper when the turntable rotates each time, continuously unwinding the kraft paper when the extrusion mechanisms extrude the molten film, extruding the kraft paper with the molten film by using the extrusion rollers to obtain composite paper, wherein the unwinding speed is 100-145m/min, the thickness of the molten film on the kraft paper is 0.04-0.06mm, and supplementing materials by using a supplementing mechanism after the extrusion mechanisms are extruded;
E. cooling treatment: cooling the composite paper by using a cooling roller, wherein the temperature of the surface of the cooling roller is 20-35 ℃;
F. bag making: and cutting and pressing edges of the prepared composite paper, and then feeding the composite paper into a bag making machine to prepare the kraft paper packaging bag.
The technical principle of the scheme is as follows: A. unreeling: unreeling kraft paper; the whole kraft paper is conveyed, and subsequent operation is conveniently carried out on the kraft paper.
B. And (3) tackifying treatment: treating the surface of kraft paper by using a corona roller; applying high-frequency high-voltage electricity on the corona roller to enable the corona roller to carry out corona discharge, so that the surface of the kraft paper can be roughened, and the surface of the kraft paper is rougher; the viscosity of the surface of the kraft paper is improved, and simultaneously oil stain, water and dust dirt on the surface of the kraft paper can be removed, so that the adhesion degree of the molten film and the kraft paper is further improved.
C. Preheating treatment: after corona treatment of kraft paper, preheating the kraft paper at 50-60 ℃. The kraft paper is preheated, so that the kraft paper can be further dehydrated, the roughness is further improved, the viscosity of the kraft paper is further improved, and the kraft paper is prevented from being damaged due to too fast temperature change when the kraft paper is subsequently contacted with the molten thin film.
D. Performing composite treatment: intermittently rotating the turntable to enable the extrusion mechanisms to be intermittently opposite to the extrusion double-roller, enabling the distance between the machine head of each extrusion mechanism and the extrusion double-roller to be 50-150mm, extruding a molten film onto kraft paper by using the extrusion mechanisms, enabling the machine head temperature of each extrusion mechanism to be 280-320 ℃, stopping unwinding the kraft paper when the turntable rotates each time, continuously unwinding the kraft paper when the extrusion mechanisms extrude the molten film, extruding the kraft paper with the molten film by using the extrusion rollers to obtain composite paper, wherein the unwinding speed is 100-145m/min, the thickness of the molten film on the kraft paper is 0.04-0.06mm, and supplementing materials by using a supplementing mechanism after the extrusion mechanisms are extruded; the rotary table is rotated intermittently, the extruding mechanisms are continuously opposite to the kraft paper, and after the extruding mechanisms which are extruded are separated from the kraft paper, the material supplementing mechanism is used for supplementing materials, so that the whole unreeling process is only stopped within a short time when the extruding mechanisms are replaced by the rotary table, and the efficiency of manufacturing the composite paper is greatly improved.
E. Cooling treatment: cooling the composite paper by using a cooling roller, wherein the temperature of the surface of the cooling roller is 20-35 ℃; the formed composite paper is cooled, so that the composite paper can be subjected to subsequent operation more quickly, and the efficiency of the whole bag making process is improved.
F. Bag making: and cutting and pressing the prepared composite paper, and then feeding the paper into a bag making machine to prepare a packaging bag. The cutting is to obtain paper with a proper size, and the edge pressing is to enable the corners of the paper to be flat and facilitate the manufacture of the packaging bag.
Compared with the prior art, the beneficial effect of this scheme does: according to the scheme, the surface of the kraft paper is subjected to tackifying treatment through the corona roller, the surface roughness of the kraft paper is improved through preheating treatment, and the viscosity is further improved, so that the molten film can be easily extruded and formed on the kraft paper, and the molten film is prevented from falling off from the kraft paper; the rotary disc drives the extrusion mechanisms intermittently to extrude the kraft paper into the molten film continuously, so that the whole unreeling process is only stopped within a short time when the extrusion mechanisms are replaced by the rotary disc, the unreeling stop time is prevented from being too long, and the efficiency of manufacturing the composite paper is greatly improved.
And further, in the step A, the motor drives the winding roller to rotate, and the winding roller drives the unwinding roller to unwind through kraft paper. The motor is started, the motor drives the winding roller to rotate, and the winding roller drives the unwinding roller to unwind through the kraft paper, so that unwinding and winding of the kraft paper are realized while proceeding.
And further, in the step B, the corona roller is cleaned through a cleaning roller, the cleaning roller is scraped through a scraper, and dust obtained by scraping the cleaning roller through the scraper is collected. The corona roller is cleaned through the cleaning roller, the time for keeping the corona roller clean is prolonged, so that the cleaning effect of the corona roller on kraft paper can be guaranteed, the tackifying treatment time of the kraft paper is prolonged, the times for cleaning the corona roller are reduced, and the labor intensity of operators is reduced.
Further, preheating the kraft paper through a preheating shell in the step C, firstly pumping air into a cooling roller, communicating the cooling roller with the preheating shell, flowing the air subjected to heat exchange from the cooling roller into the preheating shell, and preheating the kraft paper; the heating wire is installed in the preheating shell, when the heating wire is firstly unreeled, the heating wire is started to preheat kraft paper, then the heating wire is preheated by hot air flowing from the cooling roller, and the heating wire is stopped to be electrified. The resistance wire is used as an alternative heat source for preheating, when the coil is unreeled for the first time, the temperature of the kraft paper on the cooling roller is low, the heat exchange effect with cooling air is not obvious, and the preheating effect on the kraft paper cannot be achieved, and at the moment, the resistance wire can be used for preheating the kraft paper, so that the kraft paper can be better subjected to subsequent operation; and when the temperature of the cooling air after heat exchange is not enough to preheat the kraft paper, the resistance wire can be started to complement the heat, so that the preheating temperature of the kraft paper is ensured.
And furthermore, in the step B, a collecting box is covered on the cleaning roller, a negative pressure blade is rotatably connected onto the collecting box, the negative pressure blade is coaxially connected with a turbine, a turbine shell is covered on the turbine, an opening is formed in the turbine shell, and the preheating shell is communicated with the turbine shell. The air preheated by the kraft paper flows into the turbine shell, the air flow drives the turbine to rotate, and the turbine can drive the negative pressure blade to rotate, so that negative pressure air flow generated in the collecting box is realized, dust on the cleaning roller can be adsorbed to the inner wall of the collecting box, further utilization of the air is realized, energy is saved, and emission is reduced.
Further, in the step D, the distance from the machine head of the extruding mechanism to the extruding roller is 110mm, the machine head temperature of the extruding mechanism is 300 ℃, the unreeling speed is 130m/min, and the thickness of the molten film on the kraft paper is 0.05 mm. The data can make the quality of the manufactured composite paper better, and make the kraft paper and the molten film have better molding effect, more compact and difficult to fall off.
Drawings
FIG. 1 is a schematic diagram of a composite processing technique for kraft paper packaging bags according to an embodiment of the invention;
FIG. 2 is an enlarged schematic view of the collection bin of FIG. 1;
fig. 3 is an enlarged schematic view at a1 in fig. 1.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises an unwinding roller 1, a tackifying roller 2, a corona roller 3, a first driving roller 4, a preheating roller 5, a second driving roller 6, an extrusion pair roller 7, a spring 8, a third driving roller 9, a cooling roller 10, a winding roller 11, a cleaning roller 12, a collecting box 13, a scraping plate 14, a filter cover 15, a negative pressure blade 16, a turbine shell 17, an air outlet filter hole 18, an air inlet hole 19, a preheating shell 20, a communicating pipe 21, a rotating disc 22, an extrusion cylinder 23, an extrusion rod 24, an air cylinder 25, a pulley 26, a touch rod 27, a second button 28, a wedge rod 29 and a first button 30.
The embodiment is substantially as shown in figures 1, 2 and 3 of the accompanying drawings: a composite processing technology of a kraft paper packaging bag needs to use a papermaking mechanism, the papermaking mechanism comprises a rack, an unwinding roller 1 and a winding roller 11 are rotatably connected to the rack, a first motor is fixed on the rack, an output shaft of the first motor is in flat key connection with the winding roller 11, a tackifying roller 2, a first driving roller 4, a preheating roller 5, a second driving roller 6, an extrusion pair roller 7, a third driving roller 9 and a cooling roller 10 are sequentially and rotatably connected to the position between the unwinding roller 1 and the winding roller 11 on the rack, the tackifying roller 2 is abutted against a corona roller 3, the corona roller 3 is abutted against a cleaning roller 12, a collecting box 13 is covered on the cleaning roller 12, an air inlet 19 is formed on the collecting box 13, an air outlet filtering hole 18 is formed on the collecting box 13, a negative pressure blade 16 is rotatably connected to the collecting box 13, a filtering cover 15 is covered on the negative pressure blade 16, the filtering cover 15 is fixed in the collecting box 13, and the negative pressure blade 16 is coaxially connected with a, a turbine shell 17 is covered on the turbine, an opening is formed on the turbine shell 17, a preheating shell 20 is covered on the preheating roller 5, a resistance wire is installed in the preheating shell 20, a cavity is formed in the preheating shell 20, the cooling roller 10 comprises a main roller, two ends of the main roller are communicated with communicating shells, a plurality of cooling pipes are uniformly distributed in the main roller, the two communicating shells are communicated through the plurality of cooling pipes in the main roller, one ends of the two communicating shells, far away from the main roller, are rotatably connected with communicating pipes 21, the two communicating pipes 21 are clamped on a rack, an air compressor is fixed on the rack and communicated with a cooler, one communicating pipe 21 is communicated with the cooler, the other communicating pipe 21 is communicated with the cavity of the preheating shell 20, the cavity is also communicated with the turbine shell 17, a second motor is fixed on the rack through bolts, a rotary table 22 is connected with an output shaft flat key of the second motor, and four extrusion mechanisms are arranged on the rotary table 22, the rotary table 22 is also provided with four cylinders 25 in an annular array, an output shaft of each cylinder 25 is fixedly connected with an extrusion rod of the extrusion mechanism at a corresponding position, the extrusion rod is connected in an extrusion cylinder 23 of the extrusion mechanism in a sliding manner, a head of the extrusion mechanism is connected with a pulley 26 in a rotating manner, a rack is provided with a first button 30 for closing a first motor, the rack is connected with a wedge rod 29 in a sliding manner for contacting with the first button 30, the pulley 26 is used for abutting against the wedge rod 29, a spring 8 is connected between the wedge rod 29 and the rack, the extrusion rod 24 of the extrusion mechanism is fixed with a contact rod 27, the rack is fixed with a second button 28 for starting a second motor, the contact rod 27 is used for abutting against the second button 28, and the rack is fixed with a material supplementing mechanism for supplementing materials for the extrusion mechanism which finishes extruding the molten film;
the method comprises the following steps:
A. unreeling: starting a first motor, wherein the first motor drives a winding roller 11 to rotate, and the winding roller 11 drives an unwinding roller 1 to unwind through kraft paper;
B. and (3) tackifying treatment: starting an air compressor, enabling air to enter one of the communicating pipes 21 through a cooler and flow into the communicating shell, enabling the air to enter a main roller of the cooling roller 10 through the communicating shell, enabling the air to flow into the preheating shell 20 from the other communicating shell through a cooling pipe in the main roller, enabling the air to flow into a turbine shell 17 from the preheating shell 20, enabling the flowing air flow to drive a turbine to rotate, enabling the turbine to drive a negative pressure blade 16 to rotate, enabling the negative pressure blade 16 to generate negative pressure air flow in a collecting box 13, enabling a tackifying roller 2 to rotate, driving a corona roller 3, enabling the corona roller 3 to roughen the surface of kraft paper, enabling the surface viscosity of the kraft paper to be improved, removing oil stains and dust on the surface of the kraft paper, enabling the oil stains and dust to be attached to the surface of the corona roller 3, enabling a cleaning roller 12 to rotate along with the corona roller 3 and taking the oil stains and dust away from the corona roller 3, enabling the cleaning roller 12 to continuously rotate, enabling a scraper 14, the negative pressure airflow will adsorb oil and dust on the inner wall of the collecting box 13, thereby continuously cleaning the corona roller 3;
C. preheating treatment: after the kraft paper is subjected to the corona roller 3, the resistance wire is electrified firstly, so that the temperature on the preheating shell 20 is continuously increased, the kraft paper is preheated, the preheating temperature is 55 ℃, and after the temperature of the kraft paper on the surface of the cooling roller 10 is increased, the resistance wire is stopped to be electrified;
D. performing composite treatment: the preheated kraft paper moves to the extrusion roller pair 7, the first extrusion mechanism is opposite to the extrusion roller pair 7, the distance from the machine head of the extrusion mechanism to the extrusion roller pair 7 is 110mm, the air cylinder 25 connected with the first extrusion mechanism is started, the air cylinder 25 connected with the first extrusion mechanism pushes the extrusion rod 24 to slide in the extrusion cylinder 23, the extrusion rod 24 extrudes the molten film in the extrusion mechanism to the kraft paper, the machine head temperature of the extrusion mechanism is 300 ℃, after the extrusion of one extrusion mechanism is finished, the extrusion rod 24 drives the contact rod 27 to abut against the second button 28, the second button 28 starts the second motor, the second motor drives the turntable 22 to rotate, the next extrusion mechanism drives the pulley 26 to abut against the wedge rod 29, the wedge rod 29 abuts against the first button 30, both the first motor and the second motor are closed, when the machine head of the next extrusion mechanism is opposite to the kraft paper, the wedge rod 29 is separated from the first button 30, the first motor is started, when the cylinder 25 connected with the next extrusion mechanism is started, the next extrusion mechanism extrudes a molten film on kraft paper, the kraft paper with the molten film is extruded by the extrusion roller to obtain composite paper, the unwinding speed is 130m/min, the thickness of the molten film on the kraft paper is 0.05mm, the first extrusion mechanism is in butt joint with the material supplementing mechanism, and the material supplementing mechanism is started to supplement materials by using the material supplementing mechanism;
E. cooling treatment: starting the cooler, wherein the temperature of air flowing into the cooler by the air compressor is reduced, cooling air flows into a plurality of cooling pipes of the cooling roller 10, the cooling air in the cooling roller 10 exchanges heat with kraft paper, the composite paper is cooled by the cooling roller 10, and the surface temperature of the cooling roller 10 is 27 ℃;
F. bag making: and cutting and edge pressing the prepared composite paper by using a cutting machine and an edge pressing machine, and then blanking the composite paper into a bag making machine to prepare the packaging bag.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (6)
1. The composite processing technology of the kraft paper packaging bag is characterized by comprising the following steps: the papermaking mechanism comprises a frame, an unwinding roller and a winding roller are rotatably connected to the frame, a first motor is fixed to the frame, an output shaft of the first motor is connected with a flat key of the winding roller, an adhesion increasing roller, a first transmission roller, a preheating roller, a second transmission roller, an extrusion pair roller, a third transmission roller and a cooling roller are sequentially and rotatably connected to the position between the unwinding roller and the winding roller on the frame, the adhesion increasing roller is abutted against a corona roller, the corona roller is abutted against a cleaning roller, a collecting box is covered on the cleaning roller, an air inlet hole is formed in the collecting box, an air outlet filtering hole is formed in the collecting box, a negative pressure blade is rotatably connected to the collecting box, a filtering cover is covered on the negative pressure blade and fixed in the collecting box, the negative pressure blade is coaxially connected with a turbine, a turbine shell is covered on the turbine shell, an opening is formed in the turbine shell, a preheating shell is covered on the preheating roller, and a resistance wire is installed in, the preheating shell is internally provided with a cavity, the cooling roller comprises a main roller, two ends of the main roller are communicated with a communicating shell, a plurality of cooling pipes are uniformly distributed in the main roller, the two communicating shells are communicated through the plurality of cooling pipes in the main roller, one ends of the two communicating shells, which are far away from the main roller, are rotatably connected with communicating pipes, the two communicating pipes are respectively connected with a frame in a clamping way, an air compressor is fixed on the frame and is communicated with a cooler, one of the communicating pipes is communicated with the cooler, the other communicating pipe is communicated with the cavity of the preheating shell, the cavity is also communicated with a turbine shell, a second motor is fixed on the frame through bolts, an output shaft of the second motor is in flat key connection with a rotating disc, the rotating disc is provided with four extrusion mechanisms in an annular array, the rotating disc is also provided with four cylinders in an annular array, an output shaft of each cylinder is fixedly connected with an extrusion rod of the extrusion mechanism at, the machine head of the extruding mechanism is rotatably connected with a pulley, a first button used for closing a first motor is installed on the rack, a wedge rod used for being in contact with the first button is connected to the rack in a sliding mode, the pulley is used for abutting against the wedge rod, a spring is connected between the wedge rod and the rack, a contact rod is fixed on the extruding rod of the extruding mechanism, a second button used for starting a second motor is fixed on the rack, the contact rod is used for abutting against the second button, and a material supplementing mechanism used for supplementing materials to the extruding mechanism after the molten film is extruded is fixed on the rack
A. Unreeling: unreeling kraft paper;
B. and (3) tackifying treatment: treating the surface of kraft paper by using a corona roller;
C. preheating treatment: preheating kraft paper after corona treatment, wherein the preheating temperature is 50-60 ℃;
D. performing composite treatment: intermittently rotating the turntable to enable the extrusion mechanisms to be intermittently opposite to the extrusion double-roller, enabling the distance between the machine head of each extrusion mechanism and the extrusion double-roller to be 50-150mm, extruding a molten film onto kraft paper by using the extrusion mechanisms, enabling the machine head temperature of each extrusion mechanism to be 280-320 ℃, stopping unwinding the kraft paper when the turntable rotates each time, continuously unwinding the kraft paper when the extrusion mechanisms extrude the molten film, extruding the kraft paper with the molten film by using the extrusion rollers to obtain composite paper, wherein the unwinding speed is 100-145m/min, the thickness of the molten film on the kraft paper is 0.04-0.06mm, and supplementing materials by using a supplementing mechanism after the extrusion mechanisms are extruded;
E. cooling treatment: cooling the composite paper by using a cooling roller, wherein the temperature of the surface of the cooling roller is 20-35 ℃;
F. bag making: and cutting and pressing the prepared composite paper, and then feeding the paper into a bag making machine to prepare a packaging bag.
2. The composite processing technology of the kraft paper packaging bag according to claim 1, characterized in that: and B, in the step A, the motor drives the winding roller to rotate, and the winding roller drives the unwinding roller to unwind through kraft paper.
3. The composite processing technology of kraft paper packaging bag according to claim 2, characterized in that: and B, cleaning the corona roller through the cleaning roller, scraping the cleaning roller through the scraper blade, and collecting dust obtained by scraping the cleaning roller through the scraper blade.
4. The composite processing technology of the kraft paper packaging bag according to claim 3, characterized in that: in the step C, the kraft paper is preheated through the preheating shell, air is firstly injected into the cooling roller, the cooling roller is communicated with the preheating shell, the air after heat exchange from the cooling roller flows into the preheating shell, and the kraft paper is preheated; the heating wire is installed in the preheating shell, when the heating wire is firstly unreeled, the heating wire is started to preheat kraft paper, then the heating wire is preheated by hot air flowing from the cooling roller, and the heating wire is stopped to be electrified.
5. The composite processing technology of the kraft paper packaging bag according to claim 4, characterized in that: and in the step B, a collecting box is covered on the cleaning roller, a negative pressure blade is rotatably connected to the collecting box, the negative pressure blade is coaxially connected with a turbine, a turbine shell is covered on the turbine, an opening is formed in the turbine shell, and the preheating shell is communicated with the turbine shell.
6. The composite processing technology of the kraft paper packaging bag according to claim 5, characterized in that: and D, the distance from the machine head of the extruding mechanism to the extruding double-roller is 110mm, the machine head temperature of the extruding mechanism is 300 ℃, the unreeling speed is 130m/min, and the thickness of the molten film on the kraft paper is 0.05 mm.
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| CN109591375B (en) * | 2018-12-28 | 2020-09-01 | 重庆富美包装印务有限公司 | Compound processingequipment of kraft paper wrapping bag |
| CN109440341A (en) * | 2018-12-29 | 2019-03-08 | 福建省新宏港纺织科技有限公司 | A kind of fabric cleaning equipment |
| CN110216916B (en) * | 2019-05-20 | 2021-03-16 | 温州润海机械有限公司 | Bag making machine |
| CN110253959A (en) * | 2019-06-26 | 2019-09-20 | 上海岩甄自动化设备有限公司 | A kind of high frequency Bag Making Machine |
| CN110171192B (en) * | 2019-07-02 | 2021-11-23 | 深圳市景琛智能科技有限公司 | Efficient environment-friendly paper product printing and dyeing equipment and working method thereof |
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| JP6111367B1 (en) * | 2016-08-18 | 2017-04-05 | 藤森工業株式会社 | Packaging bag manufacturing method |
| WO2018070970A2 (en) * | 2016-10-12 | 2018-04-19 | Netpak Ambalaj Sanayi̇ Ti̇caret Anoni̇m Şi̇rketi̇ | Automated manufacture system for production of three-dimensional bags |
| CN106739360A (en) * | 2017-01-05 | 2017-05-31 | 齐庆德 | Multi-layer co-extruded Biaxially-oriented polyethylene synthetic paper and its manufacture method |
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