CN114318681B - Production process of dry-wet combined sanitary composite material core layer - Google Patents
Production process of dry-wet combined sanitary composite material core layer Download PDFInfo
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- CN114318681B CN114318681B CN202111677439.4A CN202111677439A CN114318681B CN 114318681 B CN114318681 B CN 114318681B CN 202111677439 A CN202111677439 A CN 202111677439A CN 114318681 B CN114318681 B CN 114318681B
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- 239000012792 core layer Substances 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 239000002131 composite material Substances 0.000 title claims abstract description 18
- 239000010410 layer Substances 0.000 claims abstract description 52
- 239000000835 fiber Substances 0.000 claims abstract description 38
- 238000001035 drying Methods 0.000 claims abstract description 33
- 239000007921 spray Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000005516 engineering process Methods 0.000 claims abstract description 5
- 238000009960 carding Methods 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims description 80
- 238000005507 spraying Methods 0.000 claims description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 238000003825 pressing Methods 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000001179 sorption measurement Methods 0.000 claims description 7
- 239000003595 mist Substances 0.000 claims description 5
- 210000001503 joint Anatomy 0.000 claims description 4
- 239000002351 wastewater Substances 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 description 12
- 239000000853 adhesive Substances 0.000 description 6
- 239000004744 fabric Substances 0.000 description 5
- 239000002002 slurry Substances 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
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Abstract
The application relates to the field of sanitary composite materials, and particularly discloses a production process of a dry-wet combined sanitary composite material core layer. The production process of the dry-wet combined sanitary composite material core layer comprises the following steps: s1, crushing and carding fluff pulp fibers in sequence to obtain dry raw material fibers; s2, dispersing the raw material fiber prepared in the step S1 into single fiber by a wind power airflow forming technology, and forming a pretreatment layer under the condition that the negative pressure is 0.01-0.02 MPa; s3, carrying out multistage spray treatment on the pretreatment layer prepared in the step S2 to obtain a pre-core layer C, and drying the pre-core layer C to obtain the product. The preparation method has the advantages that redundant waste water cannot be generated in the production process, and the environment-friendly performance of the production process is improved.
Description
Technical Field
The present application relates to the field of sanitary composite materials, and more particularly, to a process for producing a dry-wet bonded sanitary composite core.
Background
The composite material core layer is a non-woven material for absorbing and storing liquid, and is widely applied to different products such as paper diapers, sanitary napkins and the like.
The production process of the composite material core layer generally comprises the steps of dispersing fluff pulp fibers in water uniformly, finely crushing the fluff pulp fibers by a pulping machine to obtain slurry, wherein the concentration of the fibers in the slurry is 0.2%, pumping the slurry into a net part for dehydration and molding, so that the water content in the molded net layer is reduced to about 80%, then, passing the net layer through a plurality of high-pressure water absorbing tanks (negative pressure is 0.2 MPa), further removing the water to reduce the water content in the net layer to about 65%, further removing the water by a diameter pressing part, then, reducing the water content in the net layer to about 52%, and finally, obtaining the composite material core layer by a drying part.
However, in the process of dispersing fluff pulp fibers in water to prepare slurry, a large amount of wastewater is generated, and environmental pollution is easily caused.
Disclosure of Invention
In order to reduce waste water in the production process, the application provides a production process of a dry-wet combined sanitary composite material core layer.
The production process of the dry-wet combined sanitary composite material core layer adopts the following technical scheme:
a process for producing a dry-wet combined sanitary composite core layer, comprising the following steps:
s1, crushing and carding fluff pulp fibers in sequence to obtain dry raw material fibers;
s2, dispersing the raw material fiber prepared in the step S1 into single fiber by a wind power airflow forming technology, and forming a pretreatment layer under the condition that the negative pressure is 0.01-0.02 MPa;
s3, carrying out multistage spray treatment on the pretreatment layer prepared in the step S2 to obtain a pre-core layer C, and drying the pre-core layer C to obtain the product.
Through adopting above-mentioned technical scheme, and through multistage spray treatment in this application to can realize controlling product thickness and fluffy performance. Through wind-force air current shaping technique in this application, through negative pressure adsorption preparation pretreatment layer, and this application does not set up high-pressure suction box and net portion, on the one hand, reduced the process of this application and reduced the energy consumption of production process, on the other hand, this application can not produce unnecessary waste water in the production process, and then has improved the environmental protection performance of production process.
Preferably, the water content of the pre-core layer C in the step S3 is 25-35%.
Through adopting above-mentioned technical scheme, this application is through multistage spray treatment back, and the water content of core layer C in advance before the control hot pressing is compound can reduce the water consumption of production process on the one hand, on the other hand, because core layer C in advance has compared the water content of traditional surface course and has reduced nearly half to the energy consumption when drying treatment has been reduced.
Preferably, the thickness of the product prepared in the step S3 is 0.48-0.52mm. By adopting the technical scheme, the product prepared by the method has proper thickness, excellent water absorbability and lighter mass.
Preferably, S2 and S3 are both performed in a forming bed, and the forming bed comprises a preforming mechanism for preparing the pretreatment layer, a conveying mechanism and a drying mechanism, and the conveying mechanism comprises a first conveying assembly and a second conveying assembly which are sequentially arranged along a direction away from the preforming mechanism, the first conveying assembly comprises a first conveying net for conveying the pretreatment layer, a first spraying mechanism for spraying water is arranged on the first conveying net, and a water outlet of the first spraying mechanism is arranged towards the first conveying net.
Through adopting above-mentioned technical scheme, through setting up first spraying mechanism in this application to can carry out humidification to the pretreatment layer and handle, be favorable to preparing the product that has good fluffiness ability.
Preferably, the second conveying assembly comprises a second conveying net for conveying the pretreatment layer, the second conveying net is arranged on one side, close to the drying mechanism, of the first conveying net, the second conveying net and the first conveying net are arranged in a step shape on a vertical plane, and the rotation directions of the second conveying net and the first conveying net are opposite.
Through adopting above-mentioned technical scheme, through the position that prescribes a limit to first conveying net, second conveying net and first spraying mechanism in this application to carry out the humidification back to the pretreatment layer, be favorable to the pretreatment layer to peel off to the second conveying net from first conveying net surface, be favorable to the conveying of pretreatment layer, and then improved the production efficiency of product.
Preferably, the conveying mechanism further comprises a pressing assembly, the pressing assembly comprises a first pressing roller and a second pressing roller, the first pressing roller is in transmission connection with the second conveying net, the second pressing roller is in transmission connection with the first conveying net, a second spraying mechanism for spraying water is arranged on the second conveying net, and a water outlet of the second spraying mechanism is arranged towards the first pressing roller.
Through adopting above-mentioned technical scheme, through setting up the third and spray the mechanism in this application, be favorable to improving the intraformational water content of preliminary treatment on the one hand, on the other hand can also clear up first pressfitting roller for the production of this application can carry out serialization production for a long time.
Preferably, the drying mechanism comprises a drying cylinder for drying the pretreatment layer, a third spraying mechanism for spraying water is further installed on the second conveying net, and the third spraying mechanism is arranged on one side, close to the drying cylinder, of the second conveying net.
Through adopting above-mentioned technical scheme, through setting up the third in this application and spray the mechanism to be favorable to improving the control of user to the pretreatment in situ water content before the stoving, and then be favorable to improving the quality of product.
Preferably, the water outlet of the third spraying mechanism faces to the joint of the pretreatment layer and the drying cylinder.
Through adopting above-mentioned technical scheme, through inject the delivery port orientation that the third sprays the mechanism in this application, and then be favorable to reducing the steam explosion phenomenon, be favorable to the pretreatment layer to adhere to the dryer surface, and then improved the production efficiency of product.
Preferably, the temperature of water sprayed by the first spraying mechanism, the second spraying mechanism and the third spraying mechanism is 25-30 ℃.
Through adopting above-mentioned technical scheme, through the temperature that controls first spraying mechanism, second spraying mechanism and third spraying mechanism in this application, be favorable to preparing to obtain the product that has good fluffiness and thickness, and through limiting the temperature that the third sprayed mechanism, be favorable to further reducing the temperature on stoving surface, and then reduce the steam explosion phenomenon.
Preferably, the transmission rate of the first transmission network and the second transmission network is 80-120m/min.
Through adopting above-mentioned technical scheme, this application is because the mode that adopts multistage spraying for first conveying net with the quality on the pretreatment layer of second conveying net conveying is less, so can increase the speed of conveying, further improves the production efficiency of product.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the pretreatment layer is prepared through the wind power air flow forming technology, and is dried after being subjected to multistage spraying treatment, so that the thickness and the fluffiness of a product can be controlled, the working procedures of the application are reduced, the energy consumption of a production process is reduced, excessive waste water cannot be generated in the production process, and the environment-friendly performance of the production process is improved.
Drawings
FIG. 1 is a schematic overall structure of an embodiment of the present application;
FIG. 2 is a schematic illustration of the structure of a preforming mechanism in an embodiment of the present application;
FIG. 3 is an enlarged view of a portion of FIG. 2A;
FIG. 4 is a schematic view of a structure for embodying the position of a transfer mechanism and thus a preform mechanism in an embodiment of the present application;
FIG. 5 is an enlarged view of a portion of B in FIG. 4;
FIG. 6 is a schematic diagram of a structure for embodying the position of the transport mechanism and the drying mechanism in an embodiment of the present application;
fig. 7 is a partial enlarged view of C in fig. 6.
Reference numerals: 1. a preforming mechanism; 2. a conveying mechanism; 3. a drying mechanism; 4. a feed pipe; 5. a fiber guide box; 6. a screen cylinder; 7. adsorption holes; 71. a first hole; 72. a second hole; 8. forming a net; 9. a first transfer assembly; 10. a second transfer assembly; 11. a press assembly; 12. a first guide roller; 13. a first conveying roller; 14. a first transport network; 141. a first fleece web; 142. a first non-setting adhesive gridding cloth; 15. a second conveying roller; 16. a limit roller; 17. a second transport network; 18. a first press roller; 19. a second press roller; 20. a second fleece web; 21. a second non-setting adhesive gridding cloth; 22. a first spray mechanism; 23. a second spraying mechanism; 24. a drying cylinder; 25. and a third spraying mechanism.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-7 and the examples.
Referring to fig. 1, a molding bed used in the embodiment of the present application includes a preforming mechanism 1, a conveying mechanism 2, and a drying mechanism 3, which are disposed in this order.
Referring to fig. 2 and 3, preforming mechanism 1 includes conveying pipe 4 through fan conveying fibre, fixed mounting in the lateral wall and with conveying pipe 4 inside butt joint intercommunication guide box 5 and set up in guide box 5 keep away from conveying pipe 4 one side and rotatable screen cylinder 6, guide box 5 keep away from conveying pipe 4 one side and external intercommunication, screen cylinder 6 inside is provided with updraft ventilator, a plurality of absorption hole 7 have been seted up to screen cylinder 6 outer wall circumference equidistance, every absorption hole 7 all communicates with the external world along its axis direction's both ends, and screen cylinder 6 external fixation cover is equipped with shaping net 8. Each adsorption hole 7 comprises a first hole 71 and a second hole 72 which are in butt joint communication in sequence along the direction deviating from the forming net 8, the inner wall of the first hole 71 is in a round table shape, the inner wall of the second hole 72 is in a cylindrical shape, and the radial length of the end face of the first hole 71, which is close to one end of the forming net 8, is smaller than that of the end face of the first hole 71, which is far away from one end of the forming net 8. And the pore diameter of the mesh of the forming wire 8 is always smaller than the pore diameters of the first holes 71 and the second holes 72.
In other embodiments, the suction hole 7 is a cylindrical hole or a circular truncated cone formed by the abutting communication of the first hole 71 and the second hole 72.
Referring to fig. 4 and 5, the transfer mechanism 2 includes a first transfer assembly 9, a second transfer assembly 10, and a press assembly 11. The first transfer assembly 9 comprises a first guide roll 12 arranged below the screen cylinder 6, four first transfer rolls 13 and a first transfer wire 14 rotating counter-clockwise, and the first guide roll 12 is arranged between the screen cylinder 6 and the first transfer wire 14 for transferring the pre-treatment layer to the first transfer wire 14. The first conveying net 14 comprises a first felt net 141 and a first self-adhesive mesh cloth 142 which are sequentially compounded, and the lower surface of the pretreatment layer is arranged on one side, far away from the first self-adhesive mesh cloth 142, of the first felt net 141.
Referring to fig. 6, the second transfer assembly 10 includes two second transfer rolls 15, a spacing roll 16 and a second transfer net 17, and the spacing roll 16, the first guide roll 12 and the second transfer net 17 are all disposed above the first transfer net 14.
Referring to fig. 4 and 6, the press assembly 11 includes a first press roll 18 and a second press roll 19 sequentially disposed from top to bottom in a height direction, axes of the first press roll 18 and the second press roll 19 are located on the same vertical plane, and a gap for passing the transfer pretreatment layer, the first transfer web 14, and the second transfer web 17 is left between the first press roll 18 and the second press roll 19. The first conveying net 14 is driven by the second pressing roller 19 and the four first conveying rollers 13 to rotate anticlockwise; the second transfer web 17 is driven to rotate clockwise by the first nip roller 18, the limit roller 16 and the two second transfer rollers 15.
Referring to fig. 6 and 7, the second transfer net 17 includes a second felt net 20 and a second self-adhesive mesh cloth 21, which are sequentially combined, and the upper surface of the pretreatment layer is disposed at a side of the second felt net 20 away from the second self-adhesive net.
Referring to fig. 4 and 6, a first spraying mechanism 22 for spraying water is installed on one side of the first pressing roller 18 near the first guide roller 12, and a water outlet of the first spraying mechanism 22 is disposed toward the first conveying net 14, so that the lower surface of the pretreatment layer is separated from the upper surface of the first felt net 141, and the upper surface of the pretreatment layer is compounded on the lower surface of the second felt net 20; the second spraying mechanism 23 for spraying water is arranged on the side, far away from the first guide roller 12, of the second pressing roller 19, and the second spraying mechanism 23 can clean the surface of the first pressing roller 18 on one hand and can further improve the water content in the pretreatment layer on the other hand.
Referring to fig. 6, the drying mechanism 3 includes a drying cylinder 24 rotating counterclockwise for heating the shaping pretreatment layer, and the drying cylinder 24 is disposed above the limit roller 16. The spacing roller 16 is kept away from second pressfitting roller 19 one side and is provided with the third mechanism 25 that sprays that is used for spraying water, and third mechanism 25 that sprays sets up in dryer 24 is close to spacing roller 16 one side, and third mechanism 25 delivery port that sprays towards pretreatment layer and dryer 24 laminating department, on the one hand is favorable to breaking away from the second felt 20 and compounding in dryer 24 outer wall circumference with the pretreatment layer, on the other hand is favorable to cooling the dryer 24 surface that is about to laminate with the pretreatment layer.
Referring to fig. 1-7, a process for producing a dry-wet bonded sanitary composite core comprises the steps of:
s1, sequentially carrying out coarse crushing on fluff pulp fibers by a coarse crusher, fine crushing by a fine crusher, and carding by a fiber weaving machine to obtain dry raw material fibers;
s2, conveying the dried raw material fibers prepared in the step S1 to a forming bed, and driving the dried raw material fibers to flow into a fiber guide box 5 along the length direction of a feed pipe 4 by using a wind power airflow forming technology under the driving of airflow generated by a fan so as to enable most of the fibers to be dispersed into single fibers, enabling an air draft device in a screen cylinder 6 to drive wind to flow into the screen cylinder 6 sequentially through a forming net 8, a first hole 71 and a second hole 72 to form negative pressure, and adsorbing the dispersed single fibers onto the forming net 8 under the action of the negative pressure (controlling the negative pressure difference to be 0.015 MPa), so as to form a pretreatment layer;
s3, conveying the pretreated layer formed in the step S2 to a first felt layer through a first guide roller 12 in the rotation process of the rotary screen cylinder 6, so that the pretreated layer is adsorbed on the upper surface of the first felt layer after being separated from the first guide roller 12;
s4, in the anticlockwise rotation process of the first conveying net 14, the conveying speed is 100m/min, so that the pretreatment layer adsorbed on the surface of the first felt layer in S3 firstly passes through the mist spraying of the first spraying mechanism 22 to obtain a pre-core layer A with the water content of 9+/-1%, and the water temperature sprayed by the first spraying mechanism 22 is 25 ℃;
s5, under the condition that the conveying speed is kept unchanged, after the pre-core layer A is pressed by a first pressing roller and a second pressing roller, the pre-core layer A is separated from the surface of the first felt layer and is compounded on the lower surface of the second felt layer, the water content of the pre-core layer A is further increased under the mist spraying of a second spraying mechanism 23, so that a pre-core layer B is prepared, and the water temperature sprayed by the second spraying mechanism 23 is 25 ℃;
s6, in the clockwise rotation process of the second conveying net 17, the conveying speed is 100m/min, so that the pre-core layer B adsorbed on the surface of the second felt layer in S5 is sprayed by the third spraying mechanism 25 to obtain a pre-core layer C with the water content of 30+/-1%, the water temperature sprayed by the third spraying mechanism 25 is 25 ℃, the third spraying mechanism 25 is sprayed on one side, close to the drying cylinder 24, of the pre-core layer A in the spraying process, and the third spraying mechanism 25 is sprayed on the outer wall, to be compounded with the pre-core layer B, of the drying cylinder 24 in the spraying process, the temperature of the position of the drying cylinder 24 is reduced, and the possibility of instantaneous vapor explosion of water vapor is reduced, wherein the outer wall of the drying cylinder 24 is made of stainless steel materials;
s7, in the conveying process of the second conveying net 17, the pre-core layer C prepared in the step S6 is absorbed on the circumferential direction of the outer wall of the drying cylinder 24 rotating anticlockwise through separating from the surface of the second felt layer to be subjected to heat setting, and then a product with the thickness of 0.5+/-0.02 mm is prepared through scraping by a scraper, wherein the surface temperature of the drying cylinder 24 is 120 ℃, and the diameter of the drying cylinder 24 is 3m.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (4)
1. A production process of a dry-wet combined sanitary composite material core layer is characterized by comprising the following steps of: the method comprises the following steps:
s1, crushing and carding fluff pulp fibers in sequence to obtain dry raw material fibers;
s2, dispersing the raw material fiber prepared in the step S1 into single fiber by a wind power airflow forming technology, and forming a pretreatment layer under the condition that the negative pressure is 0.01-0.02 MPa;
s3, carrying out multistage spray treatment on the pretreatment layer prepared in the step S2 to prepare a pre-core layer C, and drying the pre-core layer C to prepare a product;
wherein S2 and S3 are both carried out in a forming bed, the forming bed comprises a preforming mechanism (1) for preparing a pretreatment layer, a conveying mechanism (2) and a drying mechanism (3), the conveying mechanism (2) comprises a first conveying component (9) and a second conveying component (10) which are sequentially arranged along the direction away from the preforming mechanism (1), the first conveying component (9) comprises a first conveying net (14) for conveying the pretreatment layer, a first spraying mechanism (22) for spraying water is arranged on the first conveying net (14), and a water outlet of the first spraying mechanism (22) is arranged towards the first conveying net (14);
the preforming mechanism (1) comprises a feeding pipe (4) for conveying fibers through a fan, a fiber guide box (5) fixedly installed on the side wall of the feeding pipe (4) and communicated with the inside of the feeding pipe (4) in a butt joint mode, and a rotatable screen cylinder (6) arranged on one side of the fiber guide box (5) away from the feeding pipe (4), wherein one side of the fiber guide box (5) is communicated with the outside, an air exhausting device is arranged inside the screen cylinder (6), a plurality of adsorption holes (7) are circumferentially and equidistantly formed in the outer wall of the screen cylinder (6), two ends of each adsorption hole (7) in the axial direction of the adsorption hole are communicated with the outside, a forming net (8) is fixedly sleeved outside the screen cylinder (6), each adsorption hole (7) comprises a first hole (71) and a second hole (72) which are communicated in a butt joint mode in sequence in the direction away from the forming net (8), the inner wall of the first hole (71) is cylindrical, the inner wall of the second hole (72) is close to one end face of the forming net (8), the radial length of the end face of the first hole (71) is larger than the radial length of the first hole (71) away from the forming net (8) and the radial length of the first hole (72) of the forming net (8) is always smaller than the first hole (72) of the forming net (8); the screen cylinder (6) is positioned below the fiber guide box (5), the connecting lines of the fiber guide box (5) and the screen cylinder (6) are inclined to the vertical direction, the inner side wall of the fiber guide box (5) is tightly abutted against the outer side wall of the screen cylinder (6), the inner side of the fiber guide box is set to be the inner inlet side of the screen cylinder (6) and the outer side of the fiber guide box (5) along the rotation direction of the screen cylinder (6), a gap for a pretreatment layer to pass through is reserved between the outer side of the screen cylinder (6) and the fiber guide box (5), and the projection area from the discharge port of the fiber guide box (5) to the outer side wall of the screen cylinder (6) is larger than the projection area of the outlet side of the screen cylinder (6);
the pretreatment layer is sprayed in a mist form through a first spraying mechanism (22) to obtain a pre-core layer A with the water content of 9+/-1%;
the second conveying assembly (10) comprises a second conveying net (17) for conveying the pretreatment layer, the second conveying net (17) is arranged on one side, close to the drying mechanism (3), of the first conveying net (14), the second conveying net (17) and the first conveying net (14) are arranged in a stepped manner on a vertical plane, and the rotation directions of the second conveying net (17) and the first conveying net (14) are opposite;
the conveying mechanism (2) further comprises a pressing assembly (11), the pressing assembly (11) comprises a first pressing roller (18) and a second pressing roller (19), the first pressing roller (18) is in transmission connection with the second conveying net (17), the second pressing roller (19) is in transmission connection with the first conveying net (14), a second spraying mechanism (23) for spraying water is arranged on the second conveying net (17), and a water outlet of the second spraying mechanism (23) is arranged towards the first pressing roller (18);
the pre-core layer A is pressed by a first pressing roller (18) and a second pressing roller (19), and then is sprayed by a mist spraying mechanism (23) to prepare a pre-core layer B;
the drying mechanism (3) comprises a drying cylinder (24) for drying the pretreatment layer, a third spraying mechanism (25) for spraying water is further arranged on the second conveying net (17), and the third spraying mechanism (25) is arranged on one side, close to the drying cylinder (24), of the second conveying net (17);
the water outlet of the third spraying mechanism (25) faces the joint of the pretreatment layer and the drying cylinder (24);
the pre-core layer B is sprayed in a mist mode through a third spraying mechanism (25) to obtain a pre-core layer C with the water content of 30+/-1%.
2. The process for producing a dry-wet bonded sanitary composite core according to claim 1, wherein: the thickness of the product prepared in the step S3 is 0.48-0.52mm.
3. The process for producing a dry-wet bonded sanitary composite core according to claim 1, wherein: the temperature of water sprayed by the first spraying mechanism (22), the second spraying mechanism (23) and the third spraying mechanism (25) is 25-30 ℃.
4. The process for producing a dry-wet bonded sanitary composite core according to claim 1, wherein: the transfer rate of the first transfer network (14) and the second transfer network (17) is 80-120m/min.
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| CN103381114A (en) * | 2012-08-10 | 2013-11-06 | 北京倍舒特妇幼用品有限公司 | Health nursing pad absorber processing method and equipment thereof |
| CN111411529A (en) * | 2020-01-14 | 2020-07-14 | 华南理工大学 | Thermal bonding method dust-free expanded paper and preparation method and application thereof |
| WO2021156190A1 (en) * | 2020-02-06 | 2021-08-12 | Södra Skogsägarna Ekonomisk Förening | Process for manufacturing a fiber based cellulose web for dry forming |
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