CN115414184B - Preparation method of quick-drying absorbent core - Google Patents
Preparation method of quick-drying absorbent core Download PDFInfo
- Publication number
- CN115414184B CN115414184B CN202211046207.3A CN202211046207A CN115414184B CN 115414184 B CN115414184 B CN 115414184B CN 202211046207 A CN202211046207 A CN 202211046207A CN 115414184 B CN115414184 B CN 115414184B
- Authority
- CN
- China
- Prior art keywords
- woven fabric
- absorbent core
- longitudinal
- resin material
- core body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002250 absorbent Substances 0.000 title claims abstract description 126
- 230000002745 absorbent Effects 0.000 title claims abstract description 105
- 238000001035 drying Methods 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 192
- 238000010521 absorption reaction Methods 0.000 claims abstract description 124
- 239000000463 material Substances 0.000 claims abstract description 76
- 229920005989 resin Polymers 0.000 claims abstract description 72
- 239000011347 resin Substances 0.000 claims abstract description 72
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000012792 core layer Substances 0.000 claims abstract description 26
- 239000010410 layer Substances 0.000 claims abstract description 25
- 229920000642 polymer Polymers 0.000 claims description 24
- 238000003466 welding Methods 0.000 claims description 24
- 238000007731 hot pressing Methods 0.000 claims description 13
- 239000011148 porous material Substances 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 238000004026 adhesive bonding Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 9
- 238000009826 distribution Methods 0.000 description 5
- YTAHJIFKAKIKAV-XNMGPUDCSA-N [(1R)-3-morpholin-4-yl-1-phenylpropyl] N-[(3S)-2-oxo-5-phenyl-1,3-dihydro-1,4-benzodiazepin-3-yl]carbamate Chemical compound O=C1[C@H](N=C(C2=C(N1)C=CC=C2)C1=CC=CC=C1)NC(O[C@H](CCN1CCOCC1)C1=CC=CC=C1)=O YTAHJIFKAKIKAV-XNMGPUDCSA-N 0.000 description 4
- 239000002952 polymeric resin Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15764—Transferring, feeding or handling devices; Drives
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Vascular Medicine (AREA)
- Epidemiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Absorbent Articles And Supports Therefor (AREA)
Abstract
The invention relates to the field of disposable sanitary products, in particular to a preparation method of a quick-drying absorbent core with high water absorption efficiency, which comprises the following steps: preparing a core layer; unwinding and conveying the bulked non-woven fabric; c, acquiring a conveying starting point, a conveying speed and longitudinal length dimensions of the absorption units of the bulk non-woven fabric in the step a, and determining the limit of each absorption unit; periodically adding a high-molecular water-absorbing resin material into the continuous absorption units on the upper surface of the bulk non-woven fabric; the upper layer of non-woven fabric is adhered to the upper surface of the bulked non-woven fabric; periodically adding a high molecular water-absorbing resin material into the continuous absorption units on the lower surface of the bulk non-woven fabric; adhering a lower layer of non-woven fabric to the lower surface of the bulk non-woven fabric; the water absorption capacity of the absorbent core body is increased stepwise from one longitudinal end to the other longitudinal end and then reduced stepwise.
Description
Technical Field
The invention relates to the field of disposable sanitary products, in particular to a preparation method of a quick-drying absorbent core.
Background
The absorbent core is widely used in nursing absorbent articles such as paper diapers and sanitary napkins. The traditional absorption core is formed by mixing wood pulp fiber and a high-molecular water-absorbing resin material and coating the wood pulp fiber and the high-molecular water-absorbing resin material by a non-woven fabric, so that the absorption core has the problems of easy lump formation and breakage in the use process, has larger thickness and poorer air permeability, and reduces the comfort of a user.
The comparatively extensive absorption core that uses in the present market is by double-deck non-woven fabrics centre clamp polymer resin material that absorbs water, and polymer resin material spreads on the upper surface of one of them layer non-woven fabrics, and rethread spouts gluey compound another layer non-woven fabrics, and this kind of absorption core's thickness is thinner, but polymer resin material is difficult for fixing, easily causes polymer resin material off tracking or leakage, seriously influences water absorption efficiency.
Disclosure of Invention
Accordingly, in view of the above problems, the present invention provides a method for producing a quick-drying absorbent core with high water absorption efficiency.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a preparation method of a quick-drying absorbent core comprises the following steps:
1) Preparing a core layer, wherein the core layer is provided with a continuously conveyed absorption unit, and the absorption unit is defined to extend along the conveying direction of the core layer to be a longitudinal direction and extend along the width direction of the core layer to be a transverse direction;
a) Unwinding and conveying the bulked non-woven fabric;
b) C, acquiring a conveying starting point, a conveying speed and longitudinal length dimensions of the absorption units of the bulk non-woven fabric in the step a, and determining the limit of each absorption unit;
c) B, obtaining the limit of each absorption unit in the step b, and periodically adding a high-molecular water-absorbing resin material into the absorption units with continuous upper surfaces of the bulked non-woven fabrics, wherein the high-molecular water-absorbing resin material is embedded in the pores of the bulked non-woven fabrics;
d) Uncoiling and conveying the upper non-woven fabric, gluing the lower surface of the upper non-woven fabric, and adhering the upper non-woven fabric to the upper surface of the bulked non-woven fabric;
e) Obtaining the limit of each absorption unit in the step b, and pressing a diversion trench on the product in the step d and positioned in the longitudinal middle of each absorption unit;
f) C, turning the product in the step e for 180 degrees, so that the positions of the upper surface and the lower surface of the bulked non-woven fabric are exchanged, and the lower surface of the bulked non-woven fabric is positioned on the upper side;
g) B, obtaining the limit of each absorption unit in the step b, and periodically adding a high-molecular water-absorbing resin material into the continuous absorption units on the lower surface of the bulked non-woven fabric, wherein the high-molecular water-absorbing resin material is embedded in the pores of the bulked non-woven fabric;
h) Uncoiling and conveying the lower non-woven fabric, gluing the lower surface of the lower non-woven fabric, and adhering the lower non-woven fabric to the lower surface of the bulked non-woven fabric, wherein the transverse width dimension of the lower non-woven fabric is 8-25 mm larger than that of the bulked non-woven fabric;
i) Turning over the product in the step h for 180 degrees to enable the positions of the upper non-woven fabric and the lower non-woven fabric to be exchanged;
j) The two lateral sides of the lower non-woven fabric are folded upwards and inwards to be attached to the upper surface of the upper non-woven fabric, and then the upper non-woven fabric is fixed through hot pressing or ultrasonic welding;
k) Acquiring the limit of each absorption unit in the step b and the position of the diversion trench in the step e, and fixedly connecting the upper non-woven fabric, the bulked non-woven fabric and the lower non-woven fabric in the longitudinal middle area of the diversion trench of the product in the step j through hot press or ultrasonic welding;
2) Acquiring the limit of each absorption unit in the step b, and fixedly connecting the upper non-woven fabric, the bulk non-woven fabric and the lower non-woven fabric on the two longitudinal sides of the limit of the absorption unit of the core layer in the step 1 through hot pressing or ultrasonic welding;
3) The boundary of each absorption unit in the step b is obtained, and the absorption units of the product in the step 2 are cut along the boundary to form a single absorption core body, wherein the water absorption amount of the absorption core body is increased stepwise from one longitudinal end to the other longitudinal end and then reduced stepwise.
Further, the density of the high molecular water-absorbing resin material of the absorbent core body is reduced stepwise from the longitudinal middle part of the absorbent core body to the two longitudinal ends, and the density of the high molecular water-absorbing resin material of the absorbent core body is reduced stepwise from the longitudinal middle part of the absorbent core body to the two longitudinal ends.
Further, the density of the high molecular water-absorbing resin material of the absorbent core body is reduced in a step shape from the longitudinal middle part of the absorbent core body to the longitudinal two ends, and the density of the high molecular water-absorbing resin material of the absorbent core body is uniformly distributed from the longitudinal middle part of the absorbent core body to the longitudinal two ends.
Further, the density of the high molecular water-absorbing resin material of the absorbent core body is uniformly distributed from the longitudinal middle part of the absorbent core body to the two longitudinal ends, and the density of the high molecular water-absorbing resin material of the absorbent core body is reduced from the longitudinal middle part of the absorbent core body to the two longitudinal ends in a step-like manner.
Further, no polymer water-absorbent resin material is added in the diversion trench area.
Further, the ratio of the longitudinal length dimension of the welding area in the diversion trench to the longitudinal length dimension of the diversion trench is 0.5-0.85:1.
Further, the ratio of the longitudinal length dimension of the diversion trench to the longitudinal length dimension of the absorbent core body is 0.6-0.8:1.
Further, in the step j, the transverse width dimension of the upper nonwoven fabric is 8mm to 25mm greater than the transverse width dimension of the bulky nonwoven fabric, and the transverse sides of the upper nonwoven fabric and the transverse sides of the lower nonwoven fabric are folded upward and inward together and are sandwiched between the folded region of the lower nonwoven fabric and the upper nonwoven fabric.
A preparation method of a quick-drying absorbent core comprises the following steps:
1) Preparing a core layer, wherein the core layer is provided with a continuously conveyed absorption unit, and the absorption unit is defined to extend along the conveying direction of the core layer to be a longitudinal direction and extend along the width direction of the core layer to be a transverse direction;
a) Unwinding and conveying the bulked non-woven fabric;
b) C, acquiring a conveying starting point, a conveying speed and longitudinal length dimensions of the absorption units of the bulk non-woven fabric in the step a, and determining the limit of each absorption unit;
c) B, obtaining the limit of each absorption unit in the step b, and periodically adding a high molecular water-absorbing resin material (4) into the absorption units with continuous upper surfaces of the bulked non-woven fabrics (1), wherein the high molecular water-absorbing resin material is embedded in the pores of the bulked non-woven fabrics;
d) Uncoiling and conveying the upper non-woven fabric, gluing the lower surface of the upper non-woven fabric, and adhering the upper non-woven fabric to the upper surface of the bulked non-woven fabric;
e) Obtaining the limit of each absorption unit in the step b, and pressing a diversion trench on the product in the step d and positioned in the longitudinal middle of each absorption unit;
f) C, turning the product in the step e for 180 degrees, so that the positions of the upper surface and the lower surface of the bulked non-woven fabric are exchanged, and the lower surface of the bulked non-woven fabric is positioned on the upper side;
g) B, obtaining the limit of each absorption unit in the step b, and periodically adding a high-molecular water-absorbing resin material into the continuous absorption units on the lower surface of the bulked non-woven fabric, wherein the high-molecular water-absorbing resin material is embedded in the pores of the bulked non-woven fabric;
h) Uncoiling and conveying the lower non-woven fabric, gluing the lower surface of the lower non-woven fabric, and adhering the lower non-woven fabric to the lower surface of the bulked non-woven fabric, wherein the transverse width dimension of the lower non-woven fabric is 8-25 mm larger than that of the bulked non-woven fabric;
i) Folding and attaching the two lateral sides of the lower non-woven fabric to the surface of the upper non-woven fabric downwards and inwards, and fixing the upper non-woven fabric by hot pressing or ultrasonic welding;
j) Acquiring the limit of each absorption unit in the step b and the position of the diversion trench in the step e, and fixedly connecting the upper non-woven fabric, the bulked non-woven fabric and the lower non-woven fabric in the longitudinal middle area of the diversion trench of the product in the step i through hot pressing or ultrasonic welding;
2) Acquiring the limit of each absorption unit in the step b, and fixedly connecting the upper non-woven fabric, the bulk non-woven fabric and the lower non-woven fabric on the two longitudinal sides of the limit of the absorption unit of the core layer in the step 1 through hot pressing or ultrasonic welding;
3) The boundary of each absorption unit in the step b is obtained, and the absorption units of the product in the step 2 are cut along the boundary to form a single absorption core body, wherein the water absorption amount of the absorption core body is increased stepwise from one longitudinal end to the other longitudinal end and then reduced stepwise.
By adopting the technical scheme, the invention has the beneficial effects that: the preparation method of the quick-drying absorbent core body comprises periodically adding high molecular absorbent resin materials on the upper and lower surfaces of the bulk non-woven fabrics, so that the absorbent capacity of the prepared absorbent core body is increased stepwise from one end to the other end in the longitudinal direction and then reduced stepwise, namely the high molecular absorbent resin content on both sides in the longitudinal direction of the absorbent core body is reduced, further the cost is reduced, the high molecular absorbent resin materials are embedded in the pores of the bulk non-woven fabrics to limit and fix in the transmission shaking of the bulk non-woven fabrics, meanwhile, the distribution characteristic of the high molecular absorbent resin material content in the single absorbent core body is maintained, the high molecular absorbent resin materials are intensively distributed in the longitudinal middle area of the absorbent core body, the preferential absorption effect is realized, the production cost is reduced while the absorption efficiency is improved, the quick absorption effect is realized, and the leakage of the high molecular absorbent resin materials is reduced, the preparation method can realize product improvement and upgrading on the existing core production line through minor modification, reduce input cost, simultaneously, after the bulk non-woven fabric and the upper non-woven fabric are glued and compounded, the diversion trench is pressed, after the lower non-woven fabric is compounded, the upper non-woven fabric, the bulk non-woven fabric and the lower non-woven fabric in the longitudinal middle area of the diversion trench are fixedly connected in a hot pressing or ultrasonic welding mode, material deviation during pressing the diversion trench can be avoided, pressing accuracy is improved, and a welding area on the diversion trench can maintain a good diversion trench structure after absorbing a large amount of liquid, thereby providing good diversion effect, improving the absorption speed of the product, and realizing a viscose compounding mode at the two longitudinal ends of the diversion trench, when the water absorption expansion of the high polymer water absorbent resin material is overlarge, the expansion buffer space is provided, and the upper layer non-woven fabric, the lower layer non-woven fabric and the bulk non-woven fabric are separated, so that the high polymer water-absorbent resin material on the periphery of the region can further improve the water absorption expansion and further improve the water absorption.
Drawings
FIG. 1 is a schematic flow diagram of an embodiment of the present invention;
FIG. 2 is a schematic flow diagram of a three-dimensional structure according to an embodiment of the present invention;
FIG. 3 is a schematic top view of an absorbent core body in an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of the structure at A-A in FIG. 3;
FIG. 5 is a schematic cross-sectional view of the structure at B-B in FIG. 3;
FIG. 6 is a graph showing the distribution of the water absorption capacity when the absorbent core body is extended in the longitudinal length direction in the embodiment of the present invention;
fig. 7 is a schematic cross-sectional view of a feed roll in an embodiment of the present invention.
Detailed Description
The invention will now be further described with reference to the drawings and detailed description.
The embodiment of the invention comprises the following steps:
referring to fig. 1 to 7, a method for preparing a quick-drying absorbent core comprises the following steps:
1) Preparing a core layer, wherein the core layer is provided with a continuously conveyed absorption unit, and the absorption unit is defined to extend along the conveying direction of the core layer to be a longitudinal direction and extend along the width direction of the core layer to be a transverse direction;
a) The method comprises the steps that the bulk non-woven fabric 1 is unwound and conveyed through a first unwinding unit 11, the first unwinding unit 11 is provided with a servo motor and is connected with a control unit, the starting time of the servo motor and the rotating speed of the servo motor can be determined through the control unit, and then the conveying starting point and the conveying speed of the bulk non-woven fabric 1 are determined;
b) Acquiring a conveying starting point and a conveying speed of the bulk non-woven fabric 1 in the step a, and determining the limit of each absorption unit by inputting the longitudinal length dimension of the absorption unit in the control unit in advance;
c) Acquiring the limit of each absorption unit in the step b, and periodically adding a high-molecular water-absorbent resin material 4 into the continuous absorption units on the upper surface a' of the bulked non-woven fabric 1 through a first blanking unit 12, wherein the high-molecular water-absorbent resin material 4 is embedded in the pores of the bulked non-woven fabric 1, the first blanking unit 12 comprises a blanking roller 120, at least one blanking area 121 matched with the absorption units is arranged on the outer surface surrounding the blanking roller 120, the coverage area of the blanking area 121 is the area of a single absorption unit, preferably, the blanking roller 120 is provided with two blanking areas 121, and a storage tank 122 for storing the high-molecular water-absorbent resin material is arranged on the blanking area 121, namely, when the limit of each absorption unit is acquired, the blanking roller 120 corresponds to the blanking area 121 on the blanking roller 120, and when the blanking roller 120 rotates for blanking, the corresponding single absorption unit is accurately subjected to blanking of the high-molecular water-absorbent resin material 4 through the single blanking area 121;
d) The upper layer non-woven fabric 2 is unwound and conveyed through the second unwinding unit 13, the lower surface of the upper layer non-woven fabric 2 is sized, and the upper layer non-woven fabric 2 is adhered to the upper surface a' of the bulk non-woven fabric 1;
e) Acquiring the limit of each absorption unit in the step b, and pressing a diversion trench 6 on the product in the step d and positioned in the longitudinal middle of each absorption unit through a concave-convex roller unit 14;
f) Turning the product of step e 180 ° so that the upper surface a ' and the lower surface b ' of the bulky nonwoven 1 are positioned opposite to each other, the lower surface b ' of the bulky nonwoven 1 being on the upper side;
g) Acquiring the limit of each absorption unit in the step b, and periodically adding a high-molecular water-absorbent resin material 5 into the continuous absorption units on the lower surface b' of the bulked non-woven fabric 1 through a second blanking unit 15, wherein the high-molecular water-absorbent resin material 5 is embedded in the pores of the bulked non-woven fabric 1;
h) The lower non-woven fabric 3 is unwound and conveyed through the third unwinding unit 16, the lower surface of the lower non-woven fabric 3 is glued, and the lower non-woven fabric 3 is adhered to the lower surface of the bulky non-woven fabric 1, wherein the transverse width dimension of the lower non-woven fabric 3 is 8 mm-25 mm, preferably 16mm, larger than the transverse width dimension of the bulky non-woven fabric 1;
i) Turning over the product in the step h for 180 degrees so that the positions of the upper layer non-woven fabric 2 and the lower layer non-woven fabric 3 are exchanged;
j) The two lateral sides of the lower non-woven fabric 3 are folded upwards and inwards to be attached to the upper surface of the upper non-woven fabric 2, and then are fixed by hot pressing or ultrasonic welding, preferably ultrasonic welding;
k) Acquiring the limit of each absorption unit in the step b and the position of the diversion trench 6 in the step e, and fixedly connecting the upper non-woven fabric 2, the bulk non-woven fabric 1 and the lower non-woven fabric 3 in the longitudinal middle area of the diversion trench 6 of the product in the step j through hot press or ultrasonic welding;
2) Acquiring the limit of each absorption unit in the step b, and fixedly connecting the upper non-woven fabric 2, the bulked non-woven fabric 1 and the lower non-woven fabric 3 on the two longitudinal sides of the limit of the absorption unit of the core layer in the step 1 through hot pressing or ultrasonic welding;
3) The boundaries of the individual absorbent units in step b are obtained and cut along the boundaries of the absorbent units of the product of step 2 by means of a slitting unit 17, forming a single absorbent core body 10, the absorbent capacity of the absorbent core body 10 increasing stepwise from one longitudinal end to the other longitudinal end and decreasing stepwise.
The preparation method of the quick-drying absorbent core comprises periodically adding polymer absorbent resin materials on the upper and lower surfaces of the bulk non-woven fabric 1, so that the absorbent capacity of the prepared absorbent core body 10 is increased stepwise from one end to the other end in the longitudinal direction and then reduced stepwise, namely, the polymer absorbent resin content on both sides of the absorbent core body 10 in the longitudinal direction is reduced, thereby reducing the cost, embedding the polymer absorbent resin materials in the pores of the bulk non-woven fabric 1 for limiting and fixing in the transmission shaking of the bulk non-woven fabric 1, simultaneously maintaining the distribution characteristic of the polymer absorbent resin material content in a single absorbent core body 10, enabling the polymer absorbent resin materials to be intensively distributed in the longitudinal middle area of the absorbent core body 10, realizing the preferential absorption effect, improving the absorption efficiency, simultaneously reducing the production cost and realizing the quick-absorption effect, the leakage of the high polymer water absorbent resin material is reduced, the better water absorption performance is kept, the product improvement and the upgrading can be realized on the existing core production line through minor modification by the preparation method, the input cost is reduced, meanwhile, after the bulk non-woven fabric 1 and the upper non-woven fabric 2 are glued and compounded, the diversion trench 6 is pressed, after the lower non-woven fabric 3 is compounded, the upper non-woven fabric 2, the bulk non-woven fabric 1 and the lower non-woven fabric 3 in the longitudinal middle area of the diversion trench 6 are fixedly connected in a hot press or ultrasonic welding way, the material deflection during pressing the diversion trench 6 can be avoided, the pressing accuracy is improved, the welding area on the diversion trench 6 can keep a better diversion trench 6 structure after absorbing a large amount of liquid, the better diversion effect is provided, the absorption speed of the product is improved, and the viscose compounding way is realized at the two longitudinal ends of the diversion trench 6, when the water absorption expansion of the high polymer water absorption resin material is too large, an expansion buffer space is provided, and the upper layer non-woven fabric 2 and the lower layer non-woven fabric 3 are separated from the bulk non-woven fabric 1, so that the water absorption expansion of the high polymer water absorption resin material at the periphery of the region can be further improved, and the water absorption is further improved.
Specifically, the density of the polymer water-absorbent resin material 4 of the absorbent core body 10 is reduced stepwise from the middle part of the absorbent core body 10 to the two ends of the absorbent core body 10, and the density of the polymer water-absorbent resin material 5 of the absorbent core body 10 is reduced stepwise from the middle part of the absorbent core body 10 to the two ends of the absorbent core body, so that the volume of the storage tank 122 located in the blanking area 121 is increased and then reduced along the circumferential direction of the blanking area 121 of the blanking roller 120, and the polymer water-absorbent resin material is added to the bulk non-woven fabric 1 periodically through the rotation of the storage tank 122 to form stepwise distribution, so that the equipment input cost of the blanking roller can be reduced, and the formed polymer water-absorbent resin material with stepwise distribution trend can improve the blanking accuracy of the polymer water-absorbent resin material, so as to ensure the increase of the manufactured product on the water absorption efficiency.
Alternatively, the density of the polymer water absorbent resin material 4 of the absorbent core body 10 is reduced stepwise from the longitudinal middle part of the absorbent core body 10 to the longitudinal two ends, and the density of the polymer water absorbent resin material 5 of the absorbent core body 10 is distributed uniformly from the longitudinal middle part of the absorbent core body 10 to the longitudinal two ends; alternatively, the density of the polymer water absorbent resin material 4 of the absorbent core body 10 is uniformly distributed from the longitudinal middle portion of the absorbent core body 10 to the longitudinal ends, and the density of the polymer water absorbent resin material 5 of the absorbent core body 10 is reduced stepwise from the longitudinal middle portion of the absorbent core body 10 to the longitudinal ends, so that the above-mentioned effects can be achieved.
It is worth noting that the macromolecule water-absorbent resin materials 4 and 5 are not periodically added in the area of the diversion trench 6, so that the diversion effect of the diversion trench 6 can be ensured, the water absorption efficiency is improved, and a further expansion space of the macromolecule water-absorbent resin material is provided, thereby improving the water absorption capacity.
In this embodiment, the ratio of the longitudinal length dimension of the welding area in the diversion trench 6 to the longitudinal length dimension of the diversion trench 6 is 0.5-0.85:1, preferably, the ratio is 0.75:1, and the ratio of the longitudinal length dimension of the diversion trench 6 to the longitudinal length dimension of the absorbent core body 10 is 0.6-0.8:1, preferably, the ratio is 0.7:1, so that the diversion trench 6 is distributed in the area covered with more high polymer water absorbent resin material in the absorbent core body 10 along the longitudinal direction, and can be quickly absorbed in diversion, and the setting of the welding area in the diversion trench 6 optimizes the absorption efficiency and absorption capacity of the absorbent core body 10.
In the step j, the lateral width dimension of the upper nonwoven fabric 2 is 8mm to 25mm, preferably 14mm, larger than the lateral width dimension of the bulk nonwoven fabric 1, and the lateral sides of the upper nonwoven fabric 2 are folded upward and inward together with the lateral sides of the lower nonwoven fabric 3, and are sandwiched between the folded region of the lower nonwoven fabric 3 and the upper nonwoven fabric 2, so that the side leakage of the polymer water absorbent resin material is prevented, and the lateral sides of the surface of the absorbent core body 10 form a side blocking effect during use, so that the side leakage of liquid is prevented, and the use effect is improved.
And the prepared absorbent core body 10 was tested as follows:
another implementation in this example:
a preparation method of a quick-drying absorbent core comprises the following steps:
1) Preparing a core layer, wherein the core layer is provided with a continuously conveyed absorption unit, and the absorption unit is defined to extend along the conveying direction of the core layer to be a longitudinal direction and extend along the width direction of the core layer to be a transverse direction;
a) The method comprises the steps that the bulk non-woven fabric 1 is unwound and conveyed through a first unwinding unit 11, the first unwinding unit 11 is provided with a servo motor and is connected with a control unit, the starting time of the servo motor and the rotating speed of the servo motor can be determined through the control unit, and then the conveying starting point and the conveying speed of the bulk non-woven fabric 1 are determined;
b) Acquiring a conveying starting point and a conveying speed of the bulk non-woven fabric 1 in the step a, and determining the limit of each absorption unit by inputting the longitudinal length dimension of the absorption unit in the control unit in advance;
c) Acquiring the limit of each absorption unit in the step b, and periodically adding a high-molecular water-absorbent resin material 4 into the continuous absorption units on the upper surface a' of the bulked non-woven fabric 1 through a first blanking unit 12, wherein the high-molecular water-absorbent resin material 4 is embedded in the pores of the bulked non-woven fabric 1, the first blanking unit 12 comprises a blanking roller 120, at least one blanking area 121 matched with the absorption units is arranged on the outer surface surrounding the blanking roller 120, the coverage area of the blanking area 121 is the area of a single absorption unit, preferably, the blanking roller 120 is provided with two blanking areas 121, and a storage tank 122 for storing the high-molecular water-absorbent resin material is arranged on the blanking area 121, namely, when the limit of each absorption unit is acquired, the blanking roller 120 corresponds to the blanking area 121 on the blanking roller 120, and when the blanking roller 120 rotates for blanking, the corresponding single absorption unit is accurately subjected to blanking of the high-molecular water-absorbent resin material 4 through the single blanking area 121;
d) The upper layer non-woven fabric 2 is unwound and conveyed through the second unwinding unit 13, the lower surface of the upper layer non-woven fabric 2 is sized, and the upper layer non-woven fabric 2 is adhered to the upper surface a' of the bulk non-woven fabric 1;
e) Acquiring the limit of each absorption unit in the step b, and pressing a diversion trench 6 on the product in the step d and positioned in the longitudinal middle of each absorption unit through a concave-convex roller unit 14;
f) Turning the product of step e 180 ° so that the upper surface a ' and the lower surface b ' of the bulky nonwoven 1 are positioned opposite to each other, the lower surface b ' of the bulky nonwoven 1 being on the upper side;
g) Acquiring the limit of each absorption unit in the step b, and periodically adding a high-molecular water-absorbent resin material 5 into the continuous absorption units on the lower surface b' of the bulked non-woven fabric 1 through a second blanking unit 15, wherein the high-molecular water-absorbent resin material 5 is embedded in the pores of the bulked non-woven fabric 1;
h) The lower non-woven fabric 3 is unwound and conveyed through the third unwinding unit 16, the lower surface of the lower non-woven fabric 3 is glued, and the lower non-woven fabric 3 is adhered to the lower surface of the bulky non-woven fabric 1, wherein the transverse width dimension of the lower non-woven fabric 3 is 8 mm-25 mm, preferably 16mm, larger than the transverse width dimension of the bulky non-woven fabric 1;
i) The two lateral sides of the lower non-woven fabric 3 are folded downwards and inwards to be attached to the upper surface of the upper non-woven fabric 2, and then are fixed through hot pressing or ultrasonic welding;
j) Acquiring the limit of each absorption unit in the step b and the position of the diversion trench 6 in the step e, and fixedly connecting the upper non-woven fabric 2, the bulk non-woven fabric 1 and the lower non-woven fabric 3 in the longitudinal middle area of the diversion trench 6 of the product in the step i through hot press or ultrasonic welding;
2) Acquiring the limit of each absorption unit in the step b, and fixedly connecting the upper non-woven fabric 2, the bulked non-woven fabric 1 and the lower non-woven fabric 3 on the two longitudinal sides of the limit of the absorption unit of the core layer in the step 1 through hot pressing or ultrasonic welding;
3) The boundaries of the individual absorbent units in step b are obtained and cut along the boundaries of the absorbent units of the product of step 2 by means of a slitting unit 17, forming a single absorbent core body 10, the absorbent capacity of the absorbent core body 10 increasing stepwise from one longitudinal end to the other longitudinal end and decreasing stepwise.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A preparation method of a quick-drying absorbent core is characterized in that: the method comprises the following steps:
1) Preparing a core layer, wherein the core layer is provided with a continuously conveyed absorption unit, and the absorption unit is defined to extend along the conveying direction of the core layer to be a longitudinal direction and extend along the width direction of the core layer to be a transverse direction;
a) Unwinding and conveying the bulk non-woven fabric (1);
b) Acquiring a conveying starting point, a conveying speed and longitudinal length dimensions of the absorption units of the bulk non-woven fabric (1) in the step a, and determining the limit of each absorption unit;
c) B, obtaining the limit of each absorption unit in the step b, and periodically adding a first high-molecular water-absorbing resin material (4) into the continuous absorption units on the upper surface (a') of the bulked non-woven fabric (1), wherein the first high-molecular water-absorbing resin material (4) is embedded in the pores of the bulked non-woven fabric (1);
d) The upper layer non-woven fabric (2) is unwound and conveyed, the lower surface of the upper layer non-woven fabric (2) is glued, and the upper layer non-woven fabric (2) is adhered to the upper surface (a') of the bulk non-woven fabric (1);
e) Obtaining the limit of each absorption unit in the step b, and pressing a diversion trench (6) on the product in the step d and positioned in the longitudinal middle of each absorption unit;
f) Turning the product of step e 180 ° so that the upper surface (a ') and the lower surface (b ') of the lofty nonwoven fabric (1) are positioned opposite to each other, the lower surface (b ') of the lofty nonwoven fabric (1) being on the upper side;
g) B, obtaining the limit of each absorption unit in the step b, and periodically adding a second high-molecular water-absorbing resin material (5) into the continuous absorption units on the lower surface (b') of the bulked non-woven fabric (1), wherein the second high-molecular water-absorbing resin material (5) is embedded in the pores of the bulked non-woven fabric (1);
h) Uncoiling and conveying a lower non-woven fabric (3), gluing the lower surface of the lower non-woven fabric (3), and adhering the lower non-woven fabric (3) to the lower surface of the bulk non-woven fabric (1), wherein the transverse width dimension of the lower non-woven fabric (3) is 8-25 mm larger than the transverse width dimension of the bulk non-woven fabric (1);
i) The transverse two sides of the lower non-woven fabric (3) are folded downwards and inwards to be attached to the surface of the upper non-woven fabric (2), and then the upper non-woven fabric (2) is fixed through hot pressing or ultrasonic welding, wherein the transverse width dimension of the upper non-woven fabric (2) is 8-25 mm larger than that of the bulked non-woven fabric (1), and the transverse two sides of the upper non-woven fabric (2) and the transverse two sides of the lower non-woven fabric (3) are folded upwards and inwards together and are clamped between the folding area of the lower non-woven fabric (3) and the upper non-woven fabric (2);
j) Acquiring the limit of each absorption unit in the step b and the position of the guide groove (6) in the step e, and fixedly connecting an upper layer non-woven fabric (2), a bulked non-woven fabric (1) and a lower layer non-woven fabric (3) in the longitudinal middle area of the guide groove (6) of the product in the step i through hot pressing or ultrasonic welding, wherein the ratio of the longitudinal length dimension of the welding area in the guide groove (6) to the longitudinal length dimension of the guide groove (6) is 0.5-0.85:1, the ratio of the longitudinal length dimension of the guide groove (6) to the longitudinal length dimension of the absorbent core body (10) is 0.6-0.8:1, and a first high polymer water-absorbing resin material (4) and a second high polymer water-absorbing resin material (5) are not added in the guide groove (6) area;
2) Acquiring the limit of each absorption unit in the step b, and fixedly connecting an upper layer non-woven fabric (2), a bulked non-woven fabric (1) and a lower layer non-woven fabric (3) on two longitudinal sides of the limit of the absorption unit of the core layer in the step 1 through hot pressing or ultrasonic welding;
3) The limit of each absorption unit in the step b is obtained, and the absorption units are cut along the limit of the absorption unit of the product in the step 2 to form a single absorption core body (10), wherein the water absorption amount of the absorption core body (10) is increased stepwise from one longitudinal end to the other longitudinal end and then is reduced stepwise.
2. The method for preparing a quick-drying absorbent core according to claim 1, characterized in that: the step h and the step i further include: and (3) turning the product in the step (h) 180 degrees so that the positions of the upper layer non-woven fabric (2) and the lower layer non-woven fabric (3) are exchanged.
3. The method for producing a quick-drying absorbent core according to claim 1 or 2, characterized in that: the density of the first high-molecular water-absorbing resin material (4) of the absorbent core body (10) is reduced stepwise from the longitudinal middle part of the absorbent core body (10) to the longitudinal two ends, and the density of the second high-molecular water-absorbing resin material (5) of the absorbent core body (10) is reduced stepwise from the longitudinal middle part of the absorbent core body (10) to the longitudinal two ends.
4. The method for producing a quick-drying absorbent core according to claim 1 or 2, characterized in that: the density of the first high-molecular water-absorbing resin material (4) of the absorbent core body (10) is reduced stepwise from the longitudinal middle part of the absorbent core body (10) to the longitudinal two ends, and the density of the second high-molecular water-absorbing resin material (5) of the absorbent core body (10) is distributed uniformly from the longitudinal middle part of the absorbent core body (10) to the longitudinal two ends.
5. The method for producing a quick-drying absorbent core according to claim 1 or 2, characterized in that: the density of the first high-molecular water-absorbing resin material (4) of the absorbent core body (10) is uniformly distributed from the longitudinal middle part of the absorbent core body (10) to the two longitudinal ends, and the density of the second high-molecular water-absorbing resin material (5) of the absorbent core body (10) is reduced from the longitudinal middle part of the absorbent core body (10) to the two longitudinal ends in a stepped manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211046207.3A CN115414184B (en) | 2022-08-30 | 2022-08-30 | Preparation method of quick-drying absorbent core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211046207.3A CN115414184B (en) | 2022-08-30 | 2022-08-30 | Preparation method of quick-drying absorbent core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115414184A CN115414184A (en) | 2022-12-02 |
| CN115414184B true CN115414184B (en) | 2024-04-12 |
Family
ID=84200936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211046207.3A Active CN115414184B (en) | 2022-08-30 | 2022-08-30 | Preparation method of quick-drying absorbent core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115414184B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118319610B (en) * | 2024-06-14 | 2024-11-12 | 美佳爽（中国）有限公司 | A preparation process of a high diffusivity absorbent core |
| CN119523735B (en) * | 2025-01-23 | 2025-05-02 | 美佳爽（中国）有限公司 | A preparation process of a high diffusivity absorbent core |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007039835A (en) * | 2005-08-03 | 2007-02-15 | Daiwabo Co Ltd | Bulky nonwoven fabric and nonwoven filter and method for producing them |
| CN105997367A (en) * | 2016-08-04 | 2016-10-12 | 重庆百亚卫生用品股份有限公司 | Paper diaper absorbing core body, production technology thereof and adhesive spraying technology |
| CN106726168A (en) * | 2017-03-09 | 2017-05-31 | 湖南爽洁卫生用品有限公司 | The liquid absorbent wick and its preparation technology of a kind of network |
| CN207306797U (en) * | 2017-02-20 | 2018-05-04 | 厦门源创力科技服务有限公司 | A kind of compound core body absorbent cores for being provided with staged and absorbing weakening region |
| CN210096099U (en) * | 2019-01-11 | 2020-02-21 | 厦门源创力科技服务有限公司 | Composite core body and absorbent article provided with stepped high-density pressure difference diversion area |
| WO2020177772A1 (en) * | 2019-03-01 | 2020-09-10 | 滕州市华宝卫生制品有限公司 | Composite absorbent core and preparation process therefor, and absorbent article |
| CN215606923U (en) * | 2021-06-09 | 2022-01-25 | 乐澄（中国）生活用品有限公司 | Quick water conservancy diversion absorbs core |
| CN216091077U (en) * | 2021-07-05 | 2022-03-22 | 福建兰斯贝儿卫生用品有限公司 | Absorbent core with stepped differential density structure |
| CN114931467A (en) * | 2022-05-09 | 2022-08-23 | 美佳爽（中国）有限公司 | Preparation method of novel ultrathin core |
-
2022
- 2022-08-30 CN CN202211046207.3A patent/CN115414184B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007039835A (en) * | 2005-08-03 | 2007-02-15 | Daiwabo Co Ltd | Bulky nonwoven fabric and nonwoven filter and method for producing them |
| CN105997367A (en) * | 2016-08-04 | 2016-10-12 | 重庆百亚卫生用品股份有限公司 | Paper diaper absorbing core body, production technology thereof and adhesive spraying technology |
| CN207306797U (en) * | 2017-02-20 | 2018-05-04 | 厦门源创力科技服务有限公司 | A kind of compound core body absorbent cores for being provided with staged and absorbing weakening region |
| CN106726168A (en) * | 2017-03-09 | 2017-05-31 | 湖南爽洁卫生用品有限公司 | The liquid absorbent wick and its preparation technology of a kind of network |
| CN210096099U (en) * | 2019-01-11 | 2020-02-21 | 厦门源创力科技服务有限公司 | Composite core body and absorbent article provided with stepped high-density pressure difference diversion area |
| WO2020177772A1 (en) * | 2019-03-01 | 2020-09-10 | 滕州市华宝卫生制品有限公司 | Composite absorbent core and preparation process therefor, and absorbent article |
| CN215606923U (en) * | 2021-06-09 | 2022-01-25 | 乐澄（中国）生活用品有限公司 | Quick water conservancy diversion absorbs core |
| CN216091077U (en) * | 2021-07-05 | 2022-03-22 | 福建兰斯贝儿卫生用品有限公司 | Absorbent core with stepped differential density structure |
| CN114931467A (en) * | 2022-05-09 | 2022-08-23 | 美佳爽（中国）有限公司 | Preparation method of novel ultrathin core |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115414184A (en) | 2022-12-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115414184B (en) | Preparation method of quick-drying absorbent core | |
| CN115517861B (en) | A quick-absorbing and dry absorbent core | |
| US4595441A (en) | Fabrication method for disposable articles and a liquid-absorbing disposable article | |
| KR100312852B1 (en) | A layered, absorbent structure | |
| CN1069649A (en) | Absorbent core for menstrual products | |
| CN1091029C (en) | Process for manufacturing individual layered structures comprising particulate material, and layered structures therefrom | |
| CA2280396C (en) | A sanitary absorbent napkin | |
| CN103261520B (en) | Tissue paper and method for producing tissue paper | |
| CN110063843B (en) | Composite core and manufacturing device and process thereof | |
| CN219423157U (en) | Quick-drying absorbent core | |
| CN108852625A (en) | A kind of preparation method of compound core body | |
| CN1365655A (en) | Sanitary napkin possessing enhanced flexibility region | |
| CN113730107A (en) | Absorption core and process production line thereof | |
| CN109106513B (en) | Composite absorption core | |
| CN118319610B (en) | A preparation process of a high diffusivity absorbent core | |
| CN112972119B (en) | Preparation method of paper diaper core | |
| CN118340622A (en) | High diffusivity absorption core | |
| CN115670802B (en) | A disposable absorbent product with good diversion effect and preparation method thereof | |
| CN117224319A (en) | Absorption core production line | |
| CN210330918U (en) | Core body for hygienic product and production device | |
| CN215535687U (en) | Disposable absorption core | |
| CN211326181U (en) | Core body for hygienic product | |
| CN206630777U (en) | A kind of compound core body | |
| AU778547B2 (en) | Sanitary absorbent napkin | |
| CN212547406U (en) | Absorption core, sanitary towel comprising same and production mechanism thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |