CN111764047A - Manufacturing process of paper diaper surface material with urine test function - Google Patents
Manufacturing process of paper diaper surface material with urine test function Download PDFInfo
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- CN111764047A CN111764047A CN202010595358.9A CN202010595358A CN111764047A CN 111764047 A CN111764047 A CN 111764047A CN 202010595358 A CN202010595358 A CN 202010595358A CN 111764047 A CN111764047 A CN 111764047A
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- 239000000463 material Substances 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 238000009535 clinical urine test Methods 0.000 title claims abstract description 17
- 239000000835 fiber Substances 0.000 claims abstract description 145
- 229920000742 Cotton Polymers 0.000 claims abstract description 126
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims abstract description 44
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 38
- 230000008569 process Effects 0.000 claims abstract description 35
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 30
- FOCAUTSVDIKZOP-UHFFFAOYSA-N chloroacetic acid Chemical compound OC(=O)CCl FOCAUTSVDIKZOP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229940106681 chloroacetic acid Drugs 0.000 claims abstract description 21
- 238000005507 spraying Methods 0.000 claims abstract description 19
- 239000002344 surface layer Substances 0.000 claims abstract description 19
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000243 solution Substances 0.000 claims abstract description 14
- 230000004048 modification Effects 0.000 claims abstract description 13
- 238000012986 modification Methods 0.000 claims abstract description 13
- 239000007864 aqueous solution Substances 0.000 claims abstract description 12
- 238000009960 carding Methods 0.000 claims abstract description 10
- 239000002131 composite material Substances 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 25
- 238000001035 drying Methods 0.000 claims description 17
- 229920002678 cellulose Polymers 0.000 claims description 10
- 239000001913 cellulose Substances 0.000 claims description 10
- 239000003513 alkali Substances 0.000 claims description 9
- 230000003472 neutralizing effect Effects 0.000 claims description 8
- 230000002787 reinforcement Effects 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 8
- 239000011148 porous material Substances 0.000 abstract description 7
- 210000002700 urine Anatomy 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 description 9
- 239000010410 layer Substances 0.000 description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 2
- 239000012792 core layer Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000006266 etherification reaction Methods 0.000 description 1
- 238000007306 functionalization reaction Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/425—Cellulose series
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/498—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres entanglement of layered webs
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/07—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with halogens; with halogen acids or salts thereof; with oxides or oxyacids of halogens or salts thereof
- D06M11/11—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with halogens; with halogen acids or salts thereof; with oxides or oxyacids of halogens or salts thereof with halogen acids or salts thereof
- D06M11/13—Ammonium halides or halides of elements of Groups 1 or 11 of the Periodic Table
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/144—Alcohols; Metal alcoholates
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
- D06M13/188—Monocarboxylic acids; Anhydrides, halides or salts thereof
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/02—Natural fibres, other than mineral fibres
- D06M2101/04—Vegetal fibres
- D06M2101/06—Vegetal fibres cellulosic
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The invention relates to a process for manufacturing a paper diaper surface layer material with a urine detection function, which comprises the steps of opening and removing impurities of colored cotton fibers and white cotton fibers through a bale opener and a cotton mixing box; inputting color cotton fibers and white cotton fibers into a carding machine to prepare a first fiber web and a second fiber web, and paving the first fiber web on the second fiber web to obtain a composite third fiber web; conveying the third fiber net into a spunlace machine, and carrying out a plurality of spunlace processes to obtain spunlace nonwoven fabrics; spraying ethanol and sodium hydroxide solution on the second fiber net surface in the spunlace nonwoven fabric, and then spraying mixed aqueous solution of isopropanol and chloroacetic acid on the second fiber net surface; due to the color change phenomenon of the natural colored cotton on the PH value, and the combination of the difference of the natural colored cotton and the white cotton in the fiber fineness and the carboxymethylation modification of the white cotton fiber, the prepared diaper surface layer material not only realizes the urine test function, but also has the quick one-way permeation function of hydrophilicity-super-hydrophilicity with different pore size structures.
Description
Technical Field
The invention relates to the field of diaper materials, in particular to a process for manufacturing a diaper surface layer material with a urine detection function.
Background
The paper diaper is a liquid absorption control system established by a plurality of layers of non-woven materials, generally comprises a surface layer, a flow guide layer, an absorption core layer and a bottom layer, and all the layers of structures forming the paper diaper have respective functions. At present, the paper diapers in China are mainly classified into baby paper diapers and adult paper diapers. In the face of the huge market capacity of the existing paper diapers and the higher use requirements of consumers, the paper diapers are developed towards functionalization and high performance, and the paper diapers for detecting the health of the consumers through urine become a research hotspot. In addition, the surface layer material of the paper diaper not only has better moisture absorption performance, but also often requires certain moisture permeability and moisture conductivity so as to be beneficial to the directional transportation of urine from the surface layer to the absorption core layer and enable the skin to feel dry and comfortable. Numerous research results indicate that two challenges remain in the field of liquid directional transport: (1) the multilayer porous structure material has poor and unstable mechanical properties and is easy to delaminate; (2) for hydrophilic-hydrophobic double-sided materials, a large initial driving force is required and the liquid is prone to clogging; for purely hydrophilic materials, it is difficult to manipulate the direction of transport of the liquid.
Disclosure of Invention
In order to solve the technical problems, the invention provides a process for manufacturing a paper diaper surface layer material with a urine test function. The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a process for manufacturing a paper diaper surface layer material with a urine test function comprises the following steps:
the first step is as follows: standing the natural colored cotton fiber and the white cotton fiber for 24 hours in a production environment, and then opening and removing impurities of the colored cotton fiber and the white cotton fiber through a bale opener and a cotton mixing box;
the second step is that: inputting the opened colored cotton fibers and white cotton fibers into a carding machine in sequence to form a first fiber web and a second fiber web, and then laying the first fiber web on the second fiber web to obtain a composite third fiber web;
the third step: conveying the third fiber net into a spunlace machine, and reinforcing the third fiber net by a plurality of spunlace processes; after the reinforcement is finished, drying the third fiber net, cutting edges, and winding into rolls to obtain spunlace nonwoven fabric;
the fourth step: spraying ethanol and sodium hydroxide solution on the second fiber net surface in the spunlace nonwoven fabric in sequence to enable the white cotton fibers to obtain alkali cellulose, drying, and then spraying mixed aqueous solution of isopropanol and chloroacetic acid on the second fiber net surface to realize carboxymethylation modification of the white cotton fibers;
the fifth step: and sealing, baking, washing, neutralizing and airing the treated spunlaced non-woven fabric to obtain the surface material of the paper diaper.
The natural colored cotton fiber is one of green cotton, brown cotton, red cotton, blue cotton, purple cotton and gray cotton, the fineness of the main fiber is 1.20-1.58dtex, the fiber length is 15-30mm, and the strength is 10-20 cN/tex; the main fiber fineness of the white cotton is 1.60-1.65dtex, the fiber length is 25-35mm, and the strength is 15-25 cN/tex.
The production environment is at 15-30 deg.C and relative humidity of 20-70 deg.C.
The gram weight of the first fiber web is 5-40g/m2(ii) a The gram weight of the second fiber web is 5-40g/m2(ii) a The gram weight of the third fiber web is 10-80g/m2。
And in the third step, the third fiber net is reinforced by six spunlace processes in a spunlace machine, and simultaneously, high-pressure water flow of a water needle plate in the spunlace machine acts on the surface of the first fiber net.
The pressure of a water needle plate in the hydro-entangling machine is 5 to 10MPa, 15 to 20MPa, 10 to 20MPa, 15 to 30MPa and 5 to 15MPa in sequence, and the thickness of the non-woven fabric is 0.15 to 0.45 mm.
The liquid carrying rate of the sodium hydroxide solution is 80-120%.
And in the fifth step, 10-20mL of mixed aqueous solution of isopropanol and chloroacetic acid is sprayed on the second fiber net surface every 5-10min for 60 min.
The mixture ratio of the isopropanol and the chloroacetic acid is that the isopropanol accounts for 30 wt%, the chloroacetic acid accounts for 30 wt% and the water accounts for 40 wt%.
The invention has the beneficial effects that: 1. the natural colored cotton spunlace nonwoven fabric is prepared by spunlace carding and spunlace processes according to the principle that the color of natural colored cotton changes due to the change of the PH value, and is used as a surface material of the paper diaper, so that the urine test function of the paper diaper can be realized by replacing the conventional test paper, and the pH value of urine can be directly and quickly observed by naked eyes so as to know the health condition of consumers;
2. due to the color change phenomenon of the natural colored cotton on the PH value, and the combination of the difference of the natural colored cotton and the white cotton in the fiber fineness and the carboxymethylation modification of the white cotton fiber, the prepared diaper surface layer material not only realizes the urine test function, but also has the quick one-way permeation function of hydrophilicity-super-hydrophilicity with different pore size structures. The directional transportation of urine from natural colored cotton to white cotton in the paper diaper is realized by the 'liquid diode' behavior of different pore size structures and the 'one-way permeation' action of hydrophilicity-super hydrophilicity, so that the dryness and comfort of the skin can be ensured;
3. the pH value of the natural color cotton fabric is faintly acid and is very similar to that of human skin, and the natural color cotton fabric does not irritate the skin.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of the construction of a third web of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be described more clearly and more completely with reference to the drawings in the following embodiments, and it is understood that the described embodiments are only a part of the present invention, rather than all of the present invention, and based on the embodiments, other embodiments obtained by those skilled in the art without inventive exercise are within the protection scope of the present invention.
A process for manufacturing a paper diaper surface layer material with a urine test function comprises the following steps:
the first step is as follows: standing the natural colored cotton fiber and the white cotton fiber for 24 hours in a production environment, and then opening and removing impurities of the colored cotton fiber and the white cotton fiber through a bale opener and a cotton mixing box;
the second step is that: inputting the opened colored cotton fibers and white cotton fibers into a carding machine in sequence to form a first fiber web and a second fiber web, and then laying the first fiber web on the second fiber web to obtain a composite third fiber web;
the third step: conveying the third fiber net into a spunlace machine, and reinforcing the third fiber net by a plurality of spunlace processes; after the reinforcement is finished, drying the third fiber net, cutting edges, and winding into rolls to obtain spunlace nonwoven fabric;
the fourth step: spraying ethanol and sodium hydroxide solution on the second fiber net surface in the spunlace nonwoven fabric in sequence to enable the white cotton fibers to obtain alkali cellulose, drying, and then spraying mixed aqueous solution of isopropanol and chloroacetic acid on the second fiber net surface to realize carboxymethylation modification of the white cotton fibers;
the fifth step: and sealing, baking, washing, neutralizing and airing the treated spunlaced non-woven fabric to obtain the surface material of the paper diaper.
The colored cotton fiber is one of green cotton, brown cotton, red cotton, blue cotton, purple cotton and gray cotton, the fineness of the main fiber is 1.20-1.58dtex, the fiber length is 15-30mm, and the strength is 10-20 cN/tex; the main fiber fineness of the white cotton is 1.60-1.65dtex, the fiber length is 25-35mm, and the strength is 15-25 cN/tex; the color of natural colored cotton can be changed due to the change of PH value, and the green cotton is particularly remarkable. The color of the green cotton can change towards the red and blue direction under the acidic condition, and can change towards the green and blue direction under the alkaline condition; the color of the brown cotton can change towards green yellow under an acidic condition, and can change towards red yellow under an alkaline condition; the fineness of the main fiber of the colored cotton fiber is 1.20-1.58dtex, and the fineness of the main fiber of the white cotton fiber is 1.60-1.65dtex, and the 'liquid diode' behavior caused by the pore size structure is more obvious.
The production environment is at 15-30 deg.C and relative humidity of 20-70 deg.C.
The gram weight of the first fiber web is 5-40g/m2(ii) a The gram weight of the second fiber web is 5-40g/m2(ii) a The gram weight of the third fiber web is 10-80g/m2。
And in the third step, the third fiber net is reinforced by six spunlace processes in a spunlace machine, and simultaneously, high-pressure water flow of a water needle plate in the spunlace machine acts on the surface of the first fiber net. As shown in fig. 1, it is a schematic structural diagram of a No. three fiber web, wherein 1 is a No. one fiber web, 2 is a No. two fiber web, and the arrow direction is the high-pressure water flow acting direction in a spunlace machine; the high-pressure water flow acts on the first fiber mesh surface, so that a structure with small pores of the natural colored cotton layer and large pores of the white cotton layer is formed, and the 'liquid diode' behavior caused by the pore size structure is more obvious.
The pressure of a water needle plate in the hydro-entangled machine is 5 to 10MPa, 15 to 20MPa, 10 to 20MPa, 15 to 30MPa, 5 to 15MPa in sequence, and the thickness of the non-woven fabric is 0.15 to 0.45 mm; the pressure of a water needle plate in the spunlace machine is gradually increased and then gradually reduced, the static electricity on the surface of the fiber is eliminated at low pressure, then the pressure is increased to realize the effect of spunlace fixation, the pressure is reduced again to trim the surface of the spunlace, and the water needle marks on the surface are eliminated.
The liquid carrying rate of the sodium hydroxide solution is 80-120%; the sodium hydroxide solution reacts with the cellulose to generate alkali cellulose, plays a role in promoting fiber swelling and destroying a cotton fiber crystal region, and is beneficial to the etherification reaction of isopropanol and chloroacetic acid with the fiber.
In the fifth step, 10-20mL of mixed aqueous solution of isopropanol and chloroacetic acid is sprayed on the second fiber net surface every 5-10min for 60 min; the white cotton fiber is subjected to carboxymethylation modification through isopropanol and chloroacetic acid, and meanwhile, the speed and the amount of isopropanol and chloroacetic acid infiltration are reduced, so that the second fiber web surface is prevented from being treated by adopting interval spraying.
The mixture ratio of the isopropanol and the chloroacetic acid is that the isopropanol accounts for 30 wt%, the chloroacetic acid accounts for 30 wt% and the water accounts for 40 wt%; the method prevents the substitution degree of carboxymethyl in carboxymethylation modification of the white cotton fiber from being influenced by too high or too low concentration of isopropanol and chloroacetic acid.
In order to make the present invention better understood by those skilled in the art, the following five examples are listed:
the first embodiment is as follows:
standing green cotton fibers with the main fiber fineness of 1.20dtex, the fiber length of 25mm and the strength of 15cN/tex and white cotton fibers with the main fiber fineness of 1.65dtex, the fiber length of 30mm and the strength of 20cN/tex for 24 hours in a production environment with the temperature of 25 ℃ and the relative humidity of 55 ℃, and then opening and removing impurities of the green cotton fibers and the white cotton fibers through a bale opener and a cotton mixing box; the green cotton fiber and the white cotton fiber which are opened are input into a carding machine in sequence to be made into the cotton fiber with the gram weight of 15g/m2And a grammage of 15g/m2Then laying the first fiber web on the second fiber web to obtain a composite third fiber web; conveying the third fiber net into a spunlace machine, reinforcing the third fiber net by six spunlace processes, and allowing a water needle to act on the surface of the first fiber net, wherein the pressure of a water needle plate is 5MPa, 15MPa, 20MPa, 20MPa, 15MPa and 5MPa in sequence; after the reinforcement is finished, drying the third fiber net, cutting edges, and winding into rolls to obtain spunlace nonwoven fabric; spraying ethanol and sodium hydroxide solution on the second fiber net surface in the spunlace nonwoven fabric in sequence to obtain alkali cellulose with the liquid carrying rate of 100%, drying, and spraying 20mL of mixed aqueous solution (the mass ratio is 30:30:40) of isopropanol and chloroacetic acid on the second fiber net surface every 5min to realize carboxymethylation modification of the white cotton fiber; sealing, baking, washing, neutralizing and drying the treated spunlaced nonwoven fabric,and obtaining the paper diaper surface material.
Example one diaper topsheet material prepared in this manner had a grammage of 30g/m2The thickness was 0.20mm, the liquid absorption rate was 123%, and the liquid permeation time was 0.35 s.
Example two:
standing green cotton fibers with the main fiber fineness of 1.58dtex, the fiber length of 25mm and the strength of 15cN/tex and white cotton fibers with the main fiber fineness of 1.60dtex, the fiber length of 30mm and the strength of 20cN/tex for 24 hours in a production environment with the temperature of 25 ℃ and the relative humidity of 55 ℃, and then opening and removing impurities of the green cotton fibers and the white cotton fibers through a bale opener and a cotton mixing box; the green cotton fiber and the white cotton fiber which are opened are input into a carding machine in sequence to be made into the cotton fiber with the gram weight of 15g/m2And a grammage of 15g/m2Then laying the first fiber web on the second fiber web to obtain a composite third fiber web; conveying the third fiber net into a spunlace machine, reinforcing the third fiber net by six spunlace processes, and allowing a water needle to act on the surface of the first fiber net, wherein the pressure of a water needle plate is 5MPa, 15MPa, 20MPa, 20MPa, 15MPa and 5MPa in sequence; after the reinforcement is finished, drying the third fiber net, cutting edges, and winding into rolls to obtain spunlace nonwoven fabric; spraying ethanol and sodium hydroxide solution on the second fiber net surface in the spunlace nonwoven fabric in sequence to obtain alkali cellulose with the liquid carrying rate of 100%, drying, and spraying 10mL of mixed aqueous solution (mass ratio of 30:30:40) of isopropanol and chloroacetic acid on the second fiber net surface every 10min to realize carboxymethylation modification of the white cotton fiber; and sealing, baking, washing, neutralizing and airing the treated spunlaced non-woven fabric to obtain the surface material of the paper diaper.
Example two diaper topsheet materials prepared having a grammage of 30g/m2The thickness was 0.23mm, the liquid absorption rate was 105%, and the liquid permeation time was 0.70 s.
Example three:
green cotton fiber with main fiber fineness of 1.45dtex, fiber length of 25mm and strength of 15cN/tex and white cotton fiber with main fiber fineness of 1.62dtex, fiber length of 30mm and strength of 20cN/tex are mixedStanding the cotton fibers for 24 hours in a production environment with the temperature of 25 ℃ and the relative humidity of 55 ℃, and then opening and removing impurities from the green cotton fibers and the white cotton fibers by a bale opener and a cotton mixing box; the green cotton fiber and the white cotton fiber which are opened are input into a carding machine in sequence to be made into the cotton fiber with the gram weight of 15g/m2And a grammage of 15g/m2Then laying the first fiber web on the second fiber web to obtain a composite third fiber web; conveying the third fiber net into a spunlace machine, reinforcing the third fiber net by six spunlace processes, and allowing a water needle to act on the surface of the first fiber net, wherein the pressure of a water needle plate is 5MPa, 15MPa, 20MPa, 20MPa, 15MPa and 5MPa in sequence; after the reinforcement is finished, drying the third fiber net, cutting edges, and winding into rolls to obtain spunlace nonwoven fabric; spraying ethanol and sodium hydroxide solution on the second fiber net surface in the spunlace nonwoven fabric in sequence to obtain alkali cellulose with the liquid carrying rate of 100%, drying, and spraying 15mL of mixed aqueous solution (mass ratio of 30:30:40) of isopropanol and chloroacetic acid on the second fiber net surface every 8min to realize carboxymethylation modification of the white cotton fiber; and sealing, baking, washing, neutralizing and airing the treated spunlaced non-woven fabric to obtain the surface material of the paper diaper.
Example three-prepared diaper topsheet material having a grammage of 30g/m2The thickness was 0.21mm, the liquid absorption rate was 111%, and the liquid permeation time was 0.54 s.
Example four:
standing green cotton fibers with the main fiber fineness of 1.45dtex, the fiber length of 25mm and the strength of 15cN/tex and white cotton fibers with the main fiber fineness of 1.62dtex, the fiber length of 30mm and the strength of 20cN/tex for 24 hours in a production environment with the temperature of 25 ℃ and the relative humidity of 55 ℃, and then opening and removing impurities of the green cotton fibers and the white cotton fibers through a bale opener and a cotton mixing box; the green cotton fiber and the white cotton fiber which are opened are input into a carding machine in sequence to be made into the cotton fiber with the gram weight of 40g/m2And a grammage of 40g/m2Then laying the first fiber web on the second fiber web to obtain a composite third fiber web; conveying the third fiber net into a spunlace machine, and carrying out the sixth stepReinforcing the third fiber net by a spunlace process, and enabling a water needle to act on the surface of the first fiber net, wherein the pressure of a water needle plate is 5MPa, 15MPa, 20MPa, 20MPa, 15MPa and 5MPa in sequence; after the reinforcement is finished, drying the third fiber net, cutting edges, and winding into rolls to obtain spunlace nonwoven fabric; spraying ethanol and sodium hydroxide solution on the second fiber net surface in the spunlace nonwoven fabric in sequence to obtain alkali cellulose with the liquid carrying rate of 100%, drying, and spraying 15mL of mixed aqueous solution (mass ratio of 30:30:40) of isopropanol and chloroacetic acid on the second fiber net surface every 8min to realize carboxymethylation modification of the white cotton fiber; and sealing, baking, washing, neutralizing and airing the treated spunlaced non-woven fabric to obtain the surface material of the paper diaper.
Example four diaper topsheet materials prepared having a grammage of 80g/m2The thickness was 0.40mm, the liquid absorption rate was 127%, and the liquid permeation time was 1.04 s.
Example five:
the method comprises the following steps of standing brown cotton fibers with the main fiber fineness of 1.50dtex, the fiber length of 27mm and the strength of 16cN/tex and white cotton fibers with the main fiber fineness of 1.62dtex, the fiber length of 30mm and the strength of 20cN/tex for 24 hours in a production environment with the temperature of 25 ℃ and the relative humidity of 55 ℃, and then opening and removing impurities of the brown cotton fibers and the white cotton fibers through a bale opener and a cotton mixing box; sequentially inputting the opened brown cotton fiber and white cotton fiber into a carding machine to obtain the product with a grammage of 15g/m2And a grammage of 15g/m2Then laying the first fiber web on the second fiber web to obtain a composite third fiber web; conveying the third fiber net into a spunlace machine, reinforcing the third fiber net by six spunlace processes, and allowing a water needle to act on the surface of the first fiber net, wherein the pressure of a water needle plate is 5MPa, 15MPa, 20MPa, 20MPa, 15MPa and 5MPa in sequence; after the reinforcement is finished, drying the third fiber net, cutting edges, and winding into rolls to obtain spunlace nonwoven fabric; spraying ethanol and sodium hydroxide solution on the second fiber net surface of the spunlaced nonwoven fabric in sequence to obtain alkali cellulose with the liquid carrying rate of 100%, drying, and spraying isopropanol and chlorine on the second fiber net surface every 8min15mL of acetic acid mixed aqueous solution (mass ratio is 30:30:40) realizes carboxymethylation modification of white cotton fibers; and sealing, baking, washing, neutralizing and airing the treated spunlaced non-woven fabric to obtain the surface material of the paper diaper.
Example five diaper topsheet materials prepared with a grammage of 30g/m2The thickness was 0.21mm, the liquid absorption rate was 107%, and the liquid permeation time was 0.63 s.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A process for manufacturing a paper diaper surface layer material with a urine test function is characterized by comprising the following steps: the method comprises the following steps:
the first step is as follows: standing the natural colored cotton fiber and the white cotton fiber for 24 hours in a production environment, and then opening and removing impurities of the colored cotton fiber and the white cotton fiber through a bale opener and a cotton mixing box;
the second step is that: inputting the opened colored cotton fibers and white cotton fibers into a carding machine in sequence to form a first fiber web and a second fiber web, and then laying the first fiber web on the second fiber web to obtain a composite third fiber web;
the third step: conveying the third fiber net into a spunlace machine, and reinforcing the third fiber net by a plurality of spunlace processes; after the reinforcement is finished, drying the third fiber net, cutting edges, and winding into rolls to obtain spunlace nonwoven fabric;
the fourth step: spraying ethanol and sodium hydroxide solution on the second fiber net surface in the spunlace nonwoven fabric in sequence to enable the white cotton fibers to obtain alkali cellulose, drying, and then spraying mixed aqueous solution of isopropanol and chloroacetic acid on the second fiber net surface to realize carboxymethylation modification of the white cotton fibers;
the fifth step: and sealing, baking, washing, neutralizing and airing the treated spunlaced non-woven fabric to obtain the surface material of the paper diaper.
2. The process for manufacturing the diaper surface layer material with the urine test function as claimed in claim 1, wherein the process comprises the following steps: the natural colored cotton fiber is one of green cotton, brown cotton, red cotton, blue cotton, purple cotton and gray cotton, the fineness of the main fiber is 1.20-1.58dtex, the fiber length is 15-30mm, and the strength is 10-20 cN/tex; the main fiber fineness of the white cotton is 1.60-1.65dtex, the fiber length is 25-35mm, and the strength is 15-25 cN/tex.
3. The process for manufacturing the diaper surface layer material with the urine test function as claimed in claim 1, wherein the process comprises the following steps: the production environment is at 15-30 deg.C and relative humidity of 20-70 deg.C.
4. The process for manufacturing the diaper surface layer material with the urine test function as claimed in claim 1, wherein the process comprises the following steps: the gram weight of the first fiber web is 5-40g/m2(ii) a The gram weight of the second fiber web is 5-40g/m2(ii) a The gram weight of the third fiber web is 10-80g/m2。
5. The process for manufacturing the diaper surface layer material with the urine test function as claimed in claim 1, wherein the process comprises the following steps: and in the third step, the third fiber net is reinforced by six spunlace processes in a spunlace machine, and simultaneously, high-pressure water flow of a water needle plate in the spunlace machine acts on the surface of the first fiber net.
6. The process for manufacturing the diaper surface layer material with the urine test function as claimed in claim 5, wherein the process comprises the following steps: the pressure of a water needle plate in the hydro-entangling machine is 5 to 10MPa, 15 to 20MPa, 10 to 20MPa, 15 to 30MPa and 5 to 15MPa in sequence, and the thickness of the non-woven fabric is 0.15 to 0.45 mm.
7. The process for manufacturing the diaper surface layer material with the urine test function as claimed in claim 1, wherein the process comprises the following steps: the liquid carrying rate of the sodium hydroxide solution is 80-120%.
8. The process for manufacturing the diaper surface layer material with the urine test function as claimed in claim 1, wherein the process comprises the following steps: and in the fifth step, 10-20mL of mixed aqueous solution of isopropanol and chloroacetic acid is sprayed on the second fiber net surface every 5-10min for 60 min.
9. The process for manufacturing the diaper surface layer material with the urine test function as claimed in claim 1, wherein the process comprises the following steps: the mixture ratio of the isopropanol and the chloroacetic acid is that the isopropanol accounts for 30 wt%, the chloroacetic acid accounts for 30 wt% and the water accounts for 40 wt%.
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