CN113232958A

CN113232958A - High-stiffness napkin production line and production process thereof

Info

Publication number: CN113232958A
Application number: CN202110671611.9A
Authority: CN
Inventors: 徐家振; 徐家康; 傅叶丹; 袁学通; 王进
Original assignee: Longyou Xurong Paper Industry Co ltd
Current assignee: Longyou Xurong Paper Industry Co ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2021-08-10
Anticipated expiration: 2041-06-17
Also published as: CN113232958B

Abstract

The invention discloses a high-stiffness napkin production line and a production process thereof, relates to the technical field of napkin production, and solves the problems that the existing production line needs to independently utilize a crease assembly to fold napkins during the processing and production processes, so that the time consumption is more, the working efficiency is low, and the rapid processing is not facilitated. A high-stiffness napkin production line and a production process thereof comprise a napkin main roll group, wherein the main body of the napkin main roll group is of an L-shaped structure, a napkin roll is rotationally arranged at the top of the napkin main roll group through a turning shaft bracket, and the napkin roll is inclined at an angle of 60 degrees with the horizontal plane; through being provided with folding mechanism, for production line provides automatic folding function, can realize lieing in the process department that the step leaned on before in transportation process and realize the turn to the napkin, compare and utilize solitary crease subassembly more for simple and convenient saving and save the cost, the skewed roller outside is provided with the thread groove structure, can prevent effectively that one side napkin from droing.

Description

High-stiffness napkin production line and production process thereof

Technical Field

The invention relates to the technical field of napkin production, in particular to a high-stiffness napkin production line and a production process thereof.

Background

The sanitary napkin is made of cotton pulp, wood pulp, bamboo pulp, straw pulp and other natural pollution-free raw materials, and is characterized by strong water absorption, no pathogenic bacteria, soft paper, uniform thickness, no holes, uniform wrinkling, consistent color and no impurities, is a daily product with very frequent use rate and is generally automatically processed by a production line.

Through retrieval, for example, a patent with publication number CN112357256A discloses a full-automatic disposable napkin paper packaging production line, belonging to the technical field of napkin paper packaging. Including workstation, napkin folder, napkin cutting machine, napkin transmission machine, toothpick put in machine and packagine machine, the napkin folder with the napkin cutting machine is fixed to be set up the workstation upper end, the workstation front end is equipped with the stock form frame that is used for placing the stock form, the workstation rear end with the napkin transmission machine is connected, the napkin transmission machine is kept away from the one end of workstation with packagine machine connects, toothpick put in machine fixed mounting the upper end of napkin transmission machine. The full-automatic disposable napkin paper packaging production line has high automation degree, does not need manual contact in the whole packaging process, is clean and sanitary, reduces labor force and production cost, and improves production efficiency.

For another example, patent publication No. CN210029492U discloses a napkin production line, which is sequentially provided with: the paper winding module, the paper folding module, the packaging module and the paper discharging module; the paper folding module at least comprises a dustproof shell, a slotted floor is arranged at the bottom of the dustproof shell, a turnover plate is arranged below the slotted floor, a vertical plate is fixed at the top of the turnover plate, an intermittent assembly is arranged at the input end of the turnover plate, and a drawable dust collecting box is arranged below the turnover plate. The utility model discloses simple structure, the facilitate promotion can be under the prerequisite that does not influence the folding effect of paper folding module, and the wastepaper cleaning work of paper folding module is accomplished to the efficient.

Similar to the above application, the production line has the following disadvantages:

firstly, the existing production line needs to fold the napkin by using the crease assembly independently in the processing and production process, so that more time is consumed, the working efficiency is low, and the rapid processing is not facilitated; secondly, the integrated cutting and impurity removing function is not provided, so that the working steps of cutting and impurity removing are not conveniently completed synchronously in the process of conveying the napkin; and thirdly, the relative function of maintaining operation is not provided in the impurity removal process.

Therefore, the existing requirements are not met, and a high-stiffness napkin production line and a production process thereof are provided for the requirements.

Disclosure of Invention

Problem (A)

The invention aims to provide a production line and a production process for a high-stiffness napkin, which are used for solving the problems that the prior production line needs to independently utilize a crease assembly to fold the napkin in the processing and production process, so that the time consumption is more, the working efficiency is low, and the rapid processing is not facilitated; secondly, the integrated cutting and impurity removing function is not provided, so that the working steps of cutting and impurity removing are not conveniently completed synchronously in the process of conveying the napkin; third, the problem of providing a relative function of maintaining operation during the process of removing impurities is not solved.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a high-stiffness napkin production line and a production process thereof comprise a napkin main roll group, wherein the main body of the napkin main roll group is of an L-shaped structure, a napkin roll is rotationally arranged at the top of the napkin main roll group through a turning shaft bracket, and the napkin roll is inclined at an angle of 60 degrees with the horizontal plane;

the folding mechanism main body is of a flat plate structure and is fixedly arranged at the front end of the conveying channel;

the conveying channel is an L-shaped channel, and the rear side of the conveying channel is folded to the left and connected with a packaging machine;

and the number of the circulating devices is two, and the two groups of circulating devices are fixedly arranged in the middle of the upper side and the lower side of the conveying channel.

Preferably, the folding mechanism further comprises:

the front end of the right side of the top of the folding mechanism is fixedly provided with three sections of frames, and the tops of the three sections of frames are forwards deviated and turned 30 degrees leftwards;

the left sides of the lower parts of the three sections of frames are rotatably provided with two groups of transverse rollers;

the left side of the upper part of the three-section frame is rotatably provided with two groups of oblique rollers;

the wrapping roller is rotationally arranged on the left side of the top of the folding mechanism and is matched with the left side profiles of the transverse roller and the inclined roller.

Preferably, the outer parts of the inclined rollers are provided with thread groove structures, and the thread groove structures of the two groups of inclined rollers are opposite in direction.

Preferably, the conveying channel further comprises:

the upper end and the lower end of the front side of the conveying channel are both provided with arc structures, and two groups of sealed feeding rollers are rotationally arranged in the arc structures;

the transmission belt A is rotatably arranged on the front side in the conveying channel and is of a net structure, and gears are arranged at the left ends of front rotating shafts of the two groups of transmission belts A and are meshed with each other;

two groups of transmission belts B are rotatably arranged at the rear side in the conveying channel, the transmission belts B are aligned with the transmission belts A, and gears are arranged at the left ends of rear side devices of the two groups of transmission belts B for meshing; the middle of the left side of the conveying channel is provided with a motor which is in transmission connection with a transmission belt A and a transmission belt B through gears.

Preferably, the conveying channel further comprises:

the top of the middle of the conveying channel is fixedly provided with a cutting die which is of a trapezoidal structure;

the middle bottom of the conveying channel is fixedly provided with a knife collecting groove which is positioned in the middle of the transmission belt A and the transmission belt B;

the lifting guide bar is arranged in the tool retracting groove in a sliding mode, and an air cylinder is arranged between the tool retracting groove and the bottom of the lifting guide bar;

the cut-off knife, the fixed cut-off knife that is provided with in the middle of the top that promotes the gib, the ventilation hole has been seted up in the middle of the cut-off knife.

Preferably, the conveying channel further comprises:

the conveying belt C is arranged in the rear side of the conveying channel in a rotating mode, is of an inclined structure, and gradually increases in thickness from front to back;

the middle of the right side of the conveying channel is rotatably provided with a linkage shaft, and the transmission belt B is in transmission connection with the linkage shaft through a bevel gear.

Preferably, the circulation device further comprises:

the circulating device comprises a fan shaft, a circulating device and a fan shaft, wherein the main body of the circulating device is of a U-shaped structure, and three groups of fan shafts are rotatably arranged in two ends of the circulating device;

three groups of cotton plates are fixedly arranged in the middle of the circulating device;

the driven shaft is arranged at the top of the circulating device and is in transmission connection with the fan shaft through a bevel gear;

the right side of the circulating device is rotatably provided with a transmission shaft, and the transmission shaft is in transmission connection with a driven shaft through a bevel gear; the transmission shaft is in transmission connection with the linkage shaft through a bevel gear.

Preferably, the napkin formulation and production process comprises the following steps:

1) preparing raw materials:

injecting materials: kraft softwood pulp, caustic soda grass pulp, sulfite grass pulp;

auxiliary agent: magnesium stearate, ethyl acetate, sodium carbonate, bovine serum albumin, a neutral bleaching agent, a pigment, ethylene glycol, butanediol and a sulfuric acid softener;

2) and (3) prefabricating raw materials:

quantitatively mixing sulfate softwood pulp, caustic soda straw pulp and sulfite straw pulp in advance, further disinfecting and removing stains by using a neutral bleaching agent, adding magnesium stearate and ethyl acetate to dissolve the mixed pulp and further mixing;

adding pigment to dye the slurry;

adding bovine serum albumin, ethylene glycol and butanediol, solidifying the slurry, softening by using a sulfuric acid softener, and rolling the whole piece of mould paper after the napkin is softened and dried.

Preferably, the specific values of the napkin formulation:

20% of sulfate softwood pulp;

25% of caustic soda straw pulp;

30% of sulfite straw pulp;

7% of magnesium stearate;

5% of ethyl acetate;

4% of sodium carbonate;

bovine serum albumin 3%;

1% of neutral bleaching agent;

1% of pigment;

1-2% of sulfuric acid softener;

the balance of ethylene glycol and butanediol in equal proportion.

Preferably, the production process of the high-stiffness napkin production line comprises the following steps:

the folding method comprises the following steps: pre-mixing and disinfecting, and then rolling the napkin; the napkin roll is placed at the top of the napkin main roll group, the napkin is folded by passing through the folding mechanism, the napkin roll is inclined to the horizontal plane, the oblique roller is inclined to the left, so that the paper roll can be folded by utilizing the transverse roller and the oblique roller when the left half side of the paper roll passes through the transverse roller and the right half side of the paper roll passes through the oblique roller, and the napkin roll can be prevented from being rolled by the wrapping roller; the screw thread groove is arranged outside the inclined roller, so that the napkin can be prevented from falling and separating in the conveying process.

The cutting method comprises the following steps: the napkin after will folding passes in sealed feed roller insertion two sets of drive belt A, and starter motor drives drive belt A and drive belt B rotation, and when drive belt A drove the napkin and through receipts sword groove top, start-up cylinder lifted and promoted the conducting strip, utilized the cut-off knife can cut the napkin fast.

The impurity removal method comprises the following steps: in the process of rotating the transmission belt B, the linkage shaft is driven to rotate through the bevel gear, the linkage shaft drives the transmission shaft to rotate through the bevel gear, the transmission shaft drives the driven shaft to rotate through the bevel gear, the driven shaft drives the fan shaft to rotate through the bevel gear, and circulating airflow is generated inside the circulating device; the air current sweeps the edulcoration to the position that cuts of napkin to mesh and the ventilation hole that the in-process air current that cuts passes through drive belt A keep flowing, and the napkin incision that will cut off is direct to align backward, guarantees during the napkin incision gets into drive belt B, and further the napkin gets into between two sets of conveyer belts C, carries packagine machine to pack.

(III) advantageous effects

The invention provides a high-stiffness napkin production line and a production process thereof, wherein a folding mechanism is arranged to provide an automatic folding function for the production line, the napkin can be folded at a process part near the front step in the conveying process, compared with a single crease assembly, the folding mechanism is simpler, more convenient and more economical, and saves cost, and a thread groove structure is arranged on the outer side of an inclined roller, so that the napkin on one side can be effectively prevented from falling off.

Secondly, transfer passage and circulating device's setting provides cutting edulcoration integration combined function for production line, through drive belt A, drive belt B, cut-off knife and conveyer belt C, for the napkin provides complete transport structure, can effectively guarantee napkin conveying and cut, and circulating device's setting can extend drive belt B's power, further drives the fan axle and produces the circulation air current and carry out the edulcoration to the napkin, passes through cotton board with the powder and collects.

Again, the airflow is maintained through the mesh of belt A302 and vents 308 during cutting, aligning the cut napkin cuts straight back, ensuring that the napkin cuts enter belt B303, providing the relative function of maintaining airflow during trash removal.

Drawings

FIG. 1 is a schematic flow diagram according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the overall structure in an embodiment of the present invention;

FIG. 3 is a perspective view of a conveying section in an embodiment of the present invention;

FIG. 4 is a schematic axial side view of a conveying section in an embodiment of the present invention;

FIG. 5 is a schematic perspective view of a folding mechanism according to an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of a transfer passage in an embodiment of the present invention;

FIG. 7 is a schematic perspective view of a cutting knife according to an embodiment of the present invention;

FIG. 8 is an enlarged partial structural view of part A in the embodiment of the present invention;

FIG. 9 is an enlarged partial structural view of a portion B in the embodiment of the present invention;

in fig. 1 to 9, the correspondence between the part names or lines and the reference numbers is:

1. a total roll group of napkins; 101. a napkin roll; 2. a folding mechanism; 201. three sections of racks; 202. a transverse roller; 203. a skew roller; 204. wrapping the roller; 3. a delivery channel; 301. a sealing feed roller; 302. a transmission belt A; 303. a transmission belt B; 304. cutting the die; 305. a tool retracting groove; 306. lifting the guide strip; 307. a cutter; 308. a vent hole; 309. a conveyor belt C; 310. a linkage shaft; 4. a circulation device; 401. a fan shaft; 402. a cotton board; 403. a driven shaft; 404. a drive shaft; 5. a packaging machine.

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.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 9, an embodiment of the present invention includes: a high-stiffness napkin production line and a production process thereof comprise a napkin main roll group 1, wherein the main body of the napkin main roll group 1 is of an L-shaped structure, a napkin roll 101 is rotationally arranged at the top of the napkin main roll group 1 through a turning shaft bracket, and the napkin roll 101 is inclined at 60 degrees with the horizontal plane; the folding mechanism 2, the folding mechanism 2 body is the structure of the plateform, the folding mechanism 2 is fixedly arranged at the front end of the conveying channel 3; the conveying channel 3 is an L-shaped channel, and the rear side of the conveying channel 3 is folded to the left and connected with a packaging machine 5; the circulating devices 4 are arranged in two groups, and the two groups of circulating devices 4 are fixedly arranged in the middle of the upper side and the lower side of the conveying channel 3; the circulating device 4 further comprises: the circulating device 4 comprises a fan shaft 401, the main body of the circulating device 4 is of a U-shaped structure, and three groups of fan shafts 401 are rotatably arranged in two ends of the circulating device 4; three groups of cotton plates 402 are fixedly arranged in the middle of the cotton plate 402 and the circulating device 4; the driven shaft 403 is arranged at the top of the circulating device 4, and the driven shaft 403 is in bevel gear transmission connection with the fan shaft 401; the transmission shaft 404 is rotatably arranged on the right side of the circulating device 4, and the transmission shaft 404 is in bevel gear transmission connection with the driven shaft 403; the transmission shaft 404 is in bevel gear transmission connection with the linkage shaft 310.

Wherein, folding mechanism 2 still includes: the three-section frame 201 is fixedly arranged at the front end of the right side of the top of the folding mechanism 2, and the top of the three-section frame 201 deviates forwards and turns 30 degrees leftwards; the left sides of the lower parts of the three sections of frames 201 are rotatably provided with two groups of transverse rollers 202; the left side of the upper part of the three-section frame 201 is rotatably provided with two groups of oblique rollers 203; a wrapping roller 204 is rotatably arranged on the left side of the top of the folding mechanism 2, and the wrapping roller 204 is matched with the left side outlines of the horizontal roller 202 and the inclined roller 203; the outside of oblique roller 203 has all seted up the thread groove structure, and the thread groove structure opposite direction of two sets of oblique rollers 203.

Referring to fig. 2, the transverse roller 202 and the oblique roller 203 can curl both sides of the napkin, so that the napkin can be folded directly during the conveying process, and the trouble of folding the napkin manually is avoided.

Wherein, transfer passage 3 still includes: the upper end and the lower end of the front side of the conveying channel 3 are both provided with arc structures, and two groups of sealing feeding rollers 301 are rotationally arranged in the arc structures; the transmission belt A302 is rotatably arranged at the front side in the conveying channel 3, the transmission belt A302 is of a net structure, and gears are arranged at the left ends of front side rotating shafts of the two groups of transmission belts A302 and meshed with each other; the transmission belt B303, two groups of transmission belts B303 are rotatably arranged at the rear side in the transmission channel 3, the transmission belts B303 are aligned with the transmission belt A302, and gears are arranged at the left ends of the rear side devices of the two groups of transmission belts B303 for meshing; a motor arranged in the middle of the left side of the conveying channel 3 is in gear transmission connection with a transmission belt A302 and a transmission belt B303; the cutting die 304 is fixedly arranged at the top of the middle of the conveying channel 3, and the cutting die 304 is of a trapezoidal structure; a knife receiving groove 305, wherein the knife receiving groove 305 is fixedly arranged at the middle bottom of the conveying channel 3, and the knife receiving groove 305 is positioned between the conveying belt A302 and the conveying belt B303; the lifting guide bar 306 is arranged in the tool receiving groove 305 in a sliding mode, and an air cylinder is arranged between the tool receiving groove 305 and the bottom of the lifting guide bar 306; a cutter 307, wherein the middle of the top of the lifting guide bar 306 is fixedly provided with the cutter 307, and the middle of the cutter 307 is provided with a vent hole 308; the conveying belt C309 is arranged inside the rear side of the conveying channel 3 in a rotating mode, the conveying belt C309 is of an inclined structure, and the thickness of the conveying belt C309 is gradually increased from front to back; the middle of the right side of the conveying channel 3 is rotatably provided with a linkage shaft 310, and the transmission belt B303 is in bevel gear transmission connection with the linkage shaft 310.

Referring to fig. 6, belt a302 and belt B303 move in contact with each other to provide a conveying capacity, and the air flow is kept flowing through the mesh of belt a302 and the vent 308 during cutting without being obstructed, and the napkin is blown backwards by the air flow after cutting, so that sticking at the napkin cutting position can be avoided.

The formula and the production process of the napkin comprise the following steps:

1) preparing raw materials:

2) and (3) prefabricating raw materials:

adding pigment to dye the slurry;

Preferably, the specific values of the napkin formulation:

20% of sulfate softwood pulp;

25% of caustic soda straw pulp;

30% of sulfite straw pulp;

7% of magnesium stearate;

5% of ethyl acetate;

4% of sodium carbonate;

bovine serum albumin 3%;

1% of neutral bleaching agent;

1% of pigment;

1-2% of sulfuric acid softener;

the balance of ethylene glycol and butanediol in equal proportion.

The production process of the high-stiffness napkin production line comprises the following steps:

the folding method comprises the following steps: pre-mixing and disinfecting, and then rolling the napkin; the napkin roll 101 is placed at the top of the napkin general roll group 1, the napkin is folded by passing through the folding mechanism 2, the napkin roll 101 is inclined 60 degrees with the horizontal plane, the oblique roller 203 is inclined 30 degrees to the left, so that when the left half side of the paper roll passes through the horizontal roller 202 and the right half side of the paper roll passes through the oblique roller 203, the paper roll can be folded by utilizing the horizontal roller 202 and the oblique roller 203, and the napkin roll can be prevented from being rolled by the wrapping roller 204; the outside of the oblique roller 203 is provided with a thread groove, so that the napkin can be prevented from falling and separating in the conveying process.

The cutting method comprises the following steps: the napkin after will folding passes sealed feed roller 301 and presss from both sides in two sets of drive belt A302, and starting motor drives drive belt A302 and drive belt B303 and rotates, and when drive belt A302 drove the napkin and passes through receipts sword groove 305 top, start the cylinder and rise and promote gib 306, utilizes cut-off knife 307 to cut the napkin fast.

The impurity removal method comprises the following steps: in the process of rotating the transmission belt B303, the linkage shaft 310 is driven to rotate through the bevel gear, the linkage shaft 310 drives the transmission shaft 404 to rotate through the bevel gear, the transmission shaft 404 drives the driven shaft 403 to rotate through the bevel gear, the driven shaft 403 drives the fan shaft 401 to rotate through the bevel gear, and circulating air flow is generated inside the circulating device 4; the air current sweeps the edulcoration to the position that cuts of napkin to the mesh and the ventilation hole 308 that pass through drive belt A302 keep flowing at the in-process that cuts, aligns the napkin incision that will cut off directly backward, guarantees that the napkin incision gets into in the drive belt B303, and further the napkin gets into between two sets of drive belts C309, carries packagine machine 5 and packs.

The working principle is as follows: mixing materials in advance, quantitatively mixing sulfate softwood pulp, caustic soda straw pulp and sulfite straw pulp in advance, further disinfecting and removing stains by using a neutral bleaching agent, adding magnesium stearate and ethyl acetate to dissolve the mixed pulp, further mixing and disinfecting, and rolling the napkin; adding pigment to dye the slurry; adding bovine serum albumin, ethylene glycol and butanediol, solidifying the slurry, softening by using a sulfuric acid softener, and rolling the whole piece of mould paper after the napkin is softened and dried; the napkin roll 101 is placed at the top of the napkin general roll group 1, the napkin is folded by passing through the folding mechanism 2, the napkin roll 101 is inclined 60 degrees with the horizontal plane, the oblique roller 203 is inclined 30 degrees to the left, so that when the left half side of the paper roll passes through the horizontal roller 202 and the right half side of the paper roll passes through the oblique roller 203, the paper roll can be folded by utilizing the horizontal roller 202 and the oblique roller 203, and the napkin roll can be prevented from being rolled by the wrapping roller 204; the outside of the oblique roller 203 is provided with a thread groove, so that the napkin can be prevented from falling and separating in the conveying process. The napkin after will folding passes sealed feed roller 301 and presss from both sides in two sets of drive belt A302, and starting motor drives drive belt A302 and drive belt B303 and rotates, and when drive belt A302 drove the napkin and passes through receipts sword groove 305 top, start the cylinder and rise and promote gib 306, utilizes cut-off knife 307 to cut the napkin fast. In the process of rotating the transmission belt B303, the linkage shaft 310 is driven to rotate through the bevel gear, the linkage shaft 310 drives the transmission shaft 404 to rotate through the bevel gear, the transmission shaft 404 drives the driven shaft 403 to rotate through the bevel gear, the driven shaft 403 drives the fan shaft 401 to rotate through the bevel gear, and circulating air flow is generated inside the circulating device 4; the air current sweeps the edulcoration to the position that cuts of napkin to the mesh and the ventilation hole 308 that pass through drive belt A302 keep flowing at the in-process that cuts, aligns the napkin incision that will cut off directly backward, guarantees that the napkin incision gets into in the drive belt B303, and further the napkin gets into between two sets of drive belts C309, carries packagine machine 5 and packs.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A production line of high-stiffness napkins and a production process thereof are characterized in that the production line comprises:

the main body of the napkin main roll group is of an L-shaped structure, the top of the napkin main roll group is rotatably provided with a napkin roll through a turning shaft bracket, and the napkin roll is inclined by 60 degrees with the horizontal plane;

2. The production line of napkins of claim 1, wherein said folding mechanism further comprises:

3. The production line of napkins with high stiffness as in claim 2, wherein said rollers are provided with thread groove structures on the outside, and the thread groove structures of two sets of rollers are in opposite directions.

4. The production line of high stiffness napkins according to claim 1, wherein said feeding path further comprises:

5. The production line of high stiffness napkins according to claim 4, wherein said feeding path further comprises:

6. A production line of napkins of high stiffness according to claim 5, wherein said feeding path 3 further comprises:

7. The production line of high stiffness napkins according to claim 1, wherein said recycling means further comprises:

8. The production line and the production process of the high-stiffness napkin according to claim 1, wherein the napkin formulation and the production process comprise the following steps:

1) preparing raw materials:

2) and (3) prefabricating raw materials:

adding pigment to dye the slurry;

9. The production line and the production process of the high-stiffness napkin according to claim 8, wherein in the step 1), the specific values of the napkin formula are as follows:

20% of sulfate softwood pulp;

25% of caustic soda straw pulp;

30% of sulfite straw pulp;

7% of magnesium stearate;

5% of ethyl acetate;

4% of sodium carbonate;

bovine serum albumin 3%;

1% of neutral bleaching agent;

1% of pigment;

1-2% of sulfuric acid softener;

the balance of ethylene glycol and butanediol in equal proportion.

10. A process for producing a high stiffness napkin production line according to claims 1-9, comprising the steps of:

the folding method comprises the following steps: pre-mixing and disinfecting, and then rolling the napkin; the napkin roll is placed at the top of the napkin main roll group, the napkin is folded by passing through the folding mechanism, the napkin roll is inclined 60 degrees with the horizontal plane, the oblique roller is inclined 30 degrees to the left, so that when the left half side of the paper roll passes through the transverse roller and the right half side of the paper roll passes through the oblique roller, the paper roll can be folded by utilizing the transverse roller and the oblique roller, and the napkin roll can be prevented from rolling by the wrapping roller; the screw thread groove is arranged outside the inclined roller, so that the napkin can be prevented from falling and separating in the conveying process.