阅读说明：本技术 一种复合芯体纸尿裤的制备方法 (Preparation method of composite core paper diaper ) 是由 郑佳明 蔡坤芳 谯志勇 于 2021-08-23 设计创作，主要内容包括：本发明涉及卫生用品领域,提供一种复合芯体纸尿裤的制备方法,解决现有技术的纸尿裤下渗速度慢、易发生反渗及制备工艺复杂的缺陷,包括制备透液性面层、制备复合吸收体、制备不透液性底层以及将透液性面层、复合吸收体、不透液性底层在线复合为一体的步骤,定义复合吸收体具有沿着长度方向的纵向和沿着宽度方向的横向。(The invention relates to the field of sanitary products, and provides a preparation method of a composite core paper diaper, which solves the defects of low infiltration speed, easy reverse osmosis and complex preparation process of the paper diaper in the prior art.)

1. The preparation method of the composite core paper diaper comprises the steps of preparing a liquid-permeable surface layer, preparing a composite absorber, preparing a liquid-impermeable bottom layer and compounding the liquid-permeable surface layer, the composite absorber and the liquid-impermeable bottom layer into a whole on line, wherein the composite absorber is defined to have a longitudinal direction along a length direction and a transverse direction along a width direction, and the preparation method is characterized in that the step of preparing the composite absorber is as follows:

(1) preparing a first absorbent;

(2) preparing a second absorbent;

(3) the first absorber prepared in the step (1) is conveyed on line, the two transverse sides of the first absorber are bent downwards after being processed by a pressing wheel device, and the two bent transverse sides of the first absorber are folded inwards after being processed by a folding device to form the first absorber with the two transverse sides folded downwards and inwards; the pinch roller device comprises a pinch roller body and a supporting part, the pinch roller body is rotatably arranged on the supporting part and is of a wheel-shaped structure, the width of the circumferential surface of the pinch roller body is smaller than the transverse width of a first absorber, the folding device comprises a first folding rod, a second folding rod and a fixing device for fixing the first folding rod and the second folding rod, the first folding rod and the second folding rod are fixed on the fixing device and then are provided with a first opening far away from the pinch roller device and a second opening close to the pinch roller device, the caliber of the second opening is larger than the width of the circumferential surface of the pinch roller body and smaller than the transverse width of the first absorber, and the caliber of the first opening is smaller than the caliber of the second opening;

(4) spraying glue on the surface of the second absorber prepared in the step (2), carrying out online transmission, and compounding the glue and the first absorber with two transverse sides folded downwards and inwards after the treatment in the step (3), wherein the glue spraying surface of the second absorber and the folding surfaces with two transverse sides folded downwards and inwards are compounded into a whole through roller pressing during compounding;

(5) and the steel wire is conveyed to the next processing procedure through the deviation rectifying and drawing roller.

2. The method for manufacturing a composite core paper diaper according to claim 1, wherein the method comprises the following steps: the preparation steps of the first absorber are as follows: (1) preparing a perforated material layer; (2) the perforated material layer is transmitted to the net curtain on line, a negative pressure adsorption device is arranged at the bottom of the net curtain, then the bulky fibers are sent to the net curtain paved with the perforated material layer, the bulky fibers are adsorbed into the holes of the perforated material layer through the negative pressure adsorption of the negative pressure adsorption device, and the bulky fibers and the perforated material layer are entangled; (3) spraying a layer of high-molecular water-absorbent resin on the non-woven fabric, and bonding and fixing the high-molecular water-absorbent resin and the non-woven fabric through glue; (4) and (3) compounding the pre-manufactured non-woven fabric sprayed with the high-molecular water-absorbent resin in the step (3) with the product treated in the step (2), and forming a first absorber with a bulky fiber, a perforated material layer, the high-molecular water-absorbent resin and non-woven fabric structure which are sequentially laminated from top to bottom.

3. The method for manufacturing the composite core paper diaper according to claim 2, wherein the method comprises the following steps: the perforated material layer is perforated non-woven fabric, needle punched non-woven fabric or perforated dust-free paper.

4. The method for manufacturing the composite core paper diaper according to claim 2, wherein the method comprises the following steps: the loose fibers are loose water-absorbing fibers, loose bicomponent fibers, polyester fibers, PP fibers, PE fibers or viscose fibers.

5. The method for manufacturing the composite core paper diaper according to claim 2, wherein the method comprises the following steps: the gram weight of the non-woven fabric is 6-60 g/m2, and the dosage of the high polymer water-absorbing resin is 10-400 g/m 2.

6. The method for manufacturing the composite core paper diaper according to claim 2, wherein the method comprises the following steps: the bulky fiber is polyester fiber or bi-component fiber.

7. The method for manufacturing a composite core paper diaper according to claim 6, wherein the method comprises the following steps: the bicomponent fiber is formed by mixing viscose fiber and bamboo fiber in any ratio.

8. The method for manufacturing a composite core paper diaper according to claim 1, wherein the method comprises the following steps: the second absorber is wet strength paper or non-woven fabric.

9. The method for manufacturing a composite core paper diaper according to claim 1, wherein the method comprises the following steps: the second absorber is a non-woven fabric sprayed with high-molecular water-absorbent resin.

10. The method for manufacturing a composite core paper diaper according to claim 9, wherein the method comprises the following steps: the preparation method of the second absorber comprises the following steps: the non-woven fabric is uncoiled on line and continuously conveyed, a layer of high molecular water-absorbing resin is sprayed on the surface of the non-woven fabric, and then the high molecular water-absorbing resin is fixedly bonded with the non-woven fabric through on-line glue spraying.

Technical Field

The invention relates to the field of sanitary products, in particular to a preparation method of a composite core paper diaper.

Background

The disposable sanitary article comprises a baby diaper, an adult diaper, a sanitary towel and corresponding pants-type products, and generally comprises a liquid-permeable surface layer, an absorber and a liquid-impermeable bottom layer which are sequentially stacked from top to bottom, wherein the absorber of the traditional type is formed by mixing fluff pulp and high-molecular water-absorbent resin. The absorber of traditional structure often has the absorption capacity not enough, absorption rate too slow, infiltration speed is slow, reverse osmosis volume defect such as big, and in order to solve these problems, prior art improves the absorption capacity through the polymer water-absorbent resin who increases in the absorber usually, increases infiltration speed through the fluting, solves the big problem of reverse osmosis volume through increasing reverse osmosis resistant layer.

Chinese patent No. 201921551480.5 discloses a take 3D composite core, disposable diaper, panty-shape diapers and training trousers of guiding gutter, including upper dustless paper, the super absorbent resin layer and the lower floor non-woven fabrics that the layer in proper order connects the setting, be provided with horizontal guiding gutter and vertical guiding gutter in the super absorbent resin layer, the super absorbent resin layer passes through the hot melt adhesive and is fixed together with upper dustless paper and lower floor non-woven fabrics. The patent also provides a paper diaper which comprises a leakage-proof separating edge, a surface layer, a leakage-proof bottom film and the composite core body; the composite core body is arranged between the surface layer and the leakage-proof basement membrane, and the leakage-proof separation edges are fixed on two side edges of the surface layer and the leakage-proof basement membrane. The patent also provides a paper diaper which comprises a protective enclosure paste, a leakage-proof separation edge, a surface layer, a leakage-proof bottom film and the composite core body. The composite core body in the patent scheme is thin and is provided with transverse and longitudinal flow guide grooves, so that the flow guide performance and the air permeability are improved; scattering high molecules of the composite core body in the production process; when the finished product is produced, the non-woven fabric is not required to be coated, so that the production cost is reduced. This patent provides a composite core with guiding gutter, can accelerate the absorption of liquid, but this composite core need carry out the fluting in the preparation process and handle, and production technology is comparatively complicated.

Disclosure of Invention

Therefore, aiming at the problems, the invention provides a preparation method of a paper diaper with a composite core, which solves the defects of low infiltration speed, easy reverse infiltration and complex preparation process of the paper diaper in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: a method for preparing a composite core paper diaper comprises the steps of preparing a liquid-permeable surface layer, preparing a composite absorber, preparing a liquid-impermeable bottom layer and compositing the liquid-permeable surface layer, the composite absorber and the liquid-impermeable bottom layer into a whole on line, wherein the composite absorber is defined to have a longitudinal direction along a length direction and a transverse direction along a width direction, and the step of preparing the composite absorber is as follows:

(1) preparing a first absorbent;

(2) preparing a second absorbent;

(3) the first absorber prepared in the step (1) is conveyed on line, the two transverse sides of the first absorber are bent downwards after being processed by a pressing wheel device, and the two bent transverse sides of the first absorber are folded inwards after being processed by a folding device to form the first absorber with the two transverse sides folded downwards and inwards; the pinch roller device comprises a pinch roller body and a supporting part, the pinch roller body is rotatably arranged on the supporting part and is of a wheel-shaped structure, the width of the circumferential surface of the pinch roller body is smaller than the transverse width of a first absorber, the folding device comprises a first folding rod, a second folding rod and a fixing device for fixing the first folding rod and the second folding rod, the first folding rod and the second folding rod are fixed on the fixing device and then are provided with a first opening far away from the pinch roller device and a second opening close to the pinch roller device, the caliber of the second opening is larger than the width of the circumferential surface of the pinch roller body and smaller than the transverse width of the first absorber, and the caliber of the first opening is smaller than the caliber of the second opening;

(4) spraying glue on the surface of the second absorber prepared in the step (2), carrying out online transmission, and compounding the glue and the first absorber with two transverse sides folded downwards and inwards after the treatment in the step (3), wherein the glue spraying surface of the second absorber and the folding surfaces with two transverse sides folded downwards and inwards are compounded into a whole through roller pressing during compounding;

(5) and the steel wire is conveyed to the next processing procedure through the deviation rectifying and drawing roller.

The further improvement is that: the preparation steps of the first absorber are as follows: (1) preparing a perforated material layer; (2) the perforated material layer is transmitted to the net curtain on line, a negative pressure adsorption device is arranged at the bottom of the net curtain, then the bulky fibers are sent to the net curtain paved with the perforated material layer, the bulky fibers are adsorbed into the holes of the perforated material layer through the negative pressure adsorption of the negative pressure adsorption device, and the bulky fibers and the perforated material layer are entangled; (3) spraying a layer of high-molecular water-absorbent resin on the non-woven fabric, and bonding and fixing the high-molecular water-absorbent resin and the non-woven fabric through glue; (4) and (3) compounding the pre-manufactured non-woven fabric sprayed with the high-molecular water-absorbent resin in the step (3) with the product treated in the step (2), and forming a first absorber with a bulky fiber, a perforated material layer, the high-molecular water-absorbent resin and non-woven fabric structure which are sequentially laminated from top to bottom.

The further improvement is that: the perforated material layer is perforated non-woven fabric, needle punched non-woven fabric or perforated dust-free paper.

The further improvement is that: the loose fibers are loose water-absorbing fibers, loose bicomponent fibers, polyester fibers, PP fibers, PE fibers or viscose fibers.

The further improvement is that: the gram weight of the non-woven fabric is 6-60 g/m2, and the dosage of the high polymer water-absorbing resin is 10-400 g/m 2.

The further improvement is that: the bulky fiber is polyester fiber or bi-component fiber.

The further improvement is that: the bicomponent fiber is formed by mixing viscose fiber and bamboo fiber in any ratio.

The further improvement is that: the second absorber is wet strength paper or non-woven fabric.

The further improvement is that: the second absorber is a non-woven fabric sprayed with high-molecular water-absorbent resin.

The further improvement is that: the preparation method of the second absorber comprises the following steps: the non-woven fabric is uncoiled on line and continuously conveyed, a layer of high molecular water-absorbing resin is sprayed on the surface of the non-woven fabric, and then the high molecular water-absorbing resin is fixedly bonded with the non-woven fabric through on-line glue spraying.

By adopting the technical scheme, the invention has the beneficial effects that:

1. according to the paper diaper prepared by the preparation method of the composite core body paper diaper, the first absorber is of a structure with two transverse sides folded downwards and inwards, glue is not applied to the folded part, the second absorber is arranged on the bottom surface of the first absorber and fixedly connected with the first absorber through glue, through the design of the composite structure, the folded part of the first absorber is in a 'Swiss roll' structure after absorbing water, namely the first absorber expands after absorbing water, and the middle area of the first absorber is in a concave structure compared with the folded areas on the two sides, so that the first absorber can be in a three-dimensional structure, the diffusion and absorption of the liquid are accelerated, and the contact area with the skin can be reduced due to the fact that the composite core body is not in a flat continuous structure, and the integral air permeability of the product is improved.

Further, the second absorber is wet strength paper or non-woven fabric sprayed with high molecular water absorbent resin, and can provide strong mechanical strength, so that the second absorber has strong tensile force, and can provide higher absorption capacity when the second absorber is non-woven fabric sprayed with high molecular water absorbent resin.

Furthermore, in the preparation process of the first absorber, bulk fibers, a perforated material layer, high-molecular water-absorbent resin and non-woven fabrics are compounded, the bulk fibers are adsorbed and tangled in the perforated material layer by means of a net curtain, negative pressure adsorption and other devices, and the entanglement fixation can be realized without using glue, so that the use amount of the glue is reduced, the economic cost is saved, and the bulkiness of the material and the use comfort are improved.

Furthermore, the bulky fiber adopts polyester bi-component fiber, and the polyester bi-component fiber is formed by mixing viscose fiber and bamboo fiber in any ratio, so that the bulked fiber has better hydrophilicity and diffusivity.

The first absorber is bent downwards and inwards in the preparation process by adopting the pressing wheel device with a specific structure, the pressing wheel device is different from the traditional device, the width of the circumferential surface of the pressing wheel body is set to be smaller than the transverse width of the first absorber, the first absorber is enabled to generate a curling structure after passing through the pressing wheel body, the inward folding is realized by the folding device, and then the first absorber and the second absorber are compounded into a whole by virtue of the pressing roller.

Drawings

FIG. 1 is a schematic flow chart illustrating the preparation of a composite absorbent according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a folding apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a pressing wheel device according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a composite absorbent body according to one embodiment of the present invention;

FIG. 5 is a schematic view of a first absorbent structure according to one embodiment of the present invention;

FIG. 6 is a schematic structural view of a diaper with a composite core according to an embodiment of the present invention;

FIG. 7 is a schematic view showing the structure of a second absorbent in the second embodiment of the present invention;

fig. 8 is a schematic structural view of a composite core diaper in the second embodiment of the present invention.

Detailed Description

Example one

Referring to fig. 1 to 6, a method for manufacturing a composite core diaper, comprising the steps of preparing a liquid-permeable top sheet 1, preparing a composite absorbent body 2, preparing a liquid-impermeable bottom sheet 3, and combining the liquid-permeable top sheet 1, the composite absorbent body 2, and the liquid-impermeable bottom sheet 3 into a whole on line, defining that the composite absorbent body 2 has a longitudinal direction along a length direction and a transverse direction along a width direction, the steps of preparing the composite absorbent body 2 being:

(1) preparation of the first absorbent 21: a. preparing a perforated non-woven fabric 4; b. the perforated non-woven fabric 4 is transmitted to the net curtain on line, the bottom of the net curtain is provided with a negative pressure adsorption device, the bulky water-absorbing fiber 5 is sent to the net curtain paved with the perforated non-woven fabric 4, the bulky water-absorbing fiber 5 is adsorbed into the holes of the perforated non-woven fabric 4 through the negative pressure adsorption of the negative pressure adsorption device, and the bulky water-absorbing fiber 5 is entangled with the perforated non-woven fabric 4; c. spraying a layer of high molecular water-absorbent resin 7 on the non-woven fabric 6, and adhering and fixing the high molecular water-absorbent resin 7 and the non-woven fabric 6 by glue; d. compounding the pre-manufactured non-woven fabric 6 sprayed with the high molecular water-absorbing resin 7 in the step c with the product treated in the step b to form a first absorber with a structure of bulky water-absorbing fibers 5, perforated non-woven fabric 4, high molecular water-absorbing resin 7 and non-woven fabric 6 which are sequentially laminated from top to bottom; the bulky fiber is viscose fiber and bamboo fiber, and the weight ratio of the viscose fiber to the bamboo fiber is 1: 1, mixing; the gram weight of the perforated non-woven fabric is 10g/m 2; the dosage of the high molecular water-absorbing resin is 50g/m2

(2) Preparation of the second absorbent 22: the wet strength paper is used as a second absorber, and the preparation method of the wet strength paper is the same as that of the prior art and is not repeated herein;

(3) the first absorber 21 prepared in the step (1) is conveyed on line, the two transverse sides of the first absorber are bent downwards after being processed by a pressing wheel device 8, and the two bent transverse sides of the first absorber are folded inwards after being processed by a folding device 9 to form the first absorber with the two transverse sides folded inwards; the pinch roller device 8 comprises a pinch roller body 81 and a supporting part 82, the pinch roller body 81 is rotatably arranged on the supporting part 82, the pinch roller body 81 is of a wheel-shaped structure, the width of the circumferential surface of the pinch roller body 81 is smaller than the transverse width of the first absorber 21, the folding means 9 comprises a first folding bar 91, a second folding bar 92 and fixing means 93 for fixing the first folding bar 91 and the second folding bar 92, the first folding bar 91 and the second folding bar 92 have a first opening far from the pinch roller device 8 and a second opening near the pinch roller device after being fixed to the fixing device 93, the caliber of the second opening is larger than the width of the circumferential surface of the pinch roller body and smaller than the transverse width of the first absorber, the caliber of the first opening is smaller than the caliber of the second opening, that is, the first folding bar 91 and the second folding bar 92 of the folding device 9 are distributed in an overall "eight" shape;

(4) wet strength paper is uncoiled and conveyed on line, glue is sprayed on the surface of the wet strength paper, the wet strength paper is conveyed on line and compounded with the first absorber with two transverse sides folded downwards and inwards after being treated in the step (3), the glue spraying surface of the second absorber and the folded side of the two transverse sides folded downwards and inwards of the first absorber are compounded into a whole through roller pressing, namely, on a production line, a transmission line of the wet strength paper is arranged below the transmission line of the first absorber, so that the wet strength paper is compounded on the bottom surface of the first absorber, the first absorber is of an inverted C-shaped structure, the opening faces downwards, and the wet strength paper is used for covering the opening;

(5) the liquid-permeable surface layer and the liquid-impermeable bottom layer are compounded by conveying the raw materials to the next processing procedure through the deviation rectifying and traction roller for slitting treatment.

Example two

Referring to fig. 7 and 8, compared with the first embodiment, the second absorber of the composite absorber of the present embodiment is a nonwoven fabric sprayed with a high molecular water absorbent resin, and the preparation method thereof is as follows: the non-woven fabric is uncoiled on line and continuously conveyed, a layer of high molecular water-absorbing resin is sprayed on the surface of the non-woven fabric, and then the high molecular water-absorbing resin is fixedly bonded with the non-woven fabric through on-line glue spraying.

After the composite deviation correction in the step (5), the composite absorber 2' is further subjected to one-step overturning treatment, namely the first absorber is arranged below the second absorber through overturning, and the C-shaped opening of the first absorber faces upwards. Other preparation steps are the same as the first embodiment.

In the invention, the gram weight of the perforated non-woven fabric 4 is 8-60 g/m2, and the dosage of the high molecular water-absorbing resin 7 is 50-300 g/m2, which can achieve the aim of the invention.

Wherein, a layer of bulky water-absorbing fiber can be arranged below the perforated non-woven fabric 4 for increasing the diffusion speed of liquid and improving the water absorption performance, and the first absorber can also be a spun-bonded non-woven fabric, a high-molecular water-absorbing resin, a mixture of the bulky non-woven fabric and the high-molecular water-absorbing resin mixed in any ratio, and the spun-bonded non-woven fabric are sequentially compounded by gluing from top to bottom; the first absorber can also be formed by sequentially compounding non-woven fabrics, bulky cotton sprayed with high-molecular water-absorbent resin, high-molecular water-absorbent resin and non-woven fabrics from top to bottom, and the non-woven fabrics can be hot air non-woven fabrics or spunlace non-woven fabrics or spun-bonded non-woven fabrics. The second absorbent may be a single nonwoven fabric other than the wet strength paper and the nonwoven fabric sprayed with the high-molecular water-absorbent resin, and the above options can achieve the object of the present invention.

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 detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.