CN116602820A - Soft and breathable adult nursing pad and preparation process thereof - Google Patents
Soft and breathable adult nursing pad and preparation process thereof Download PDFInfo
- Publication number
- CN116602820A CN116602820A CN202310584671.6A CN202310584671A CN116602820A CN 116602820 A CN116602820 A CN 116602820A CN 202310584671 A CN202310584671 A CN 202310584671A CN 116602820 A CN116602820 A CN 116602820A
- Authority
- CN
- China
- Prior art keywords
- cellulose
- parts
- fiber
- aramid
- breathable
- 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.)
- Granted
Links
- 230000000474 nursing effect Effects 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 63
- 239000000835 fiber Substances 0.000 claims abstract description 54
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 53
- 238000010521 absorption reaction Methods 0.000 claims abstract description 51
- 229920002749 Bacterial cellulose Polymers 0.000 claims abstract description 42
- 239000005016 bacterial cellulose Substances 0.000 claims abstract description 42
- 239000007788 liquid Substances 0.000 claims abstract description 42
- 229920006231 aramid fiber Polymers 0.000 claims abstract description 41
- 239000010410 layer Substances 0.000 claims abstract description 34
- 239000011550 stock solution Substances 0.000 claims abstract description 28
- 229920005989 resin Polymers 0.000 claims abstract description 27
- 239000011347 resin Substances 0.000 claims abstract description 27
- 239000011248 coating agent Substances 0.000 claims abstract description 26
- 238000000576 coating method Methods 0.000 claims abstract description 26
- 239000004760 aramid Substances 0.000 claims abstract description 25
- 239000002250 absorbent Substances 0.000 claims abstract description 22
- 238000001035 drying Methods 0.000 claims abstract description 22
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 21
- 239000000243 solution Substances 0.000 claims abstract description 21
- 238000005406 washing Methods 0.000 claims abstract description 21
- 229920003235 aromatic polyamide Polymers 0.000 claims abstract description 20
- 239000012792 core layer Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 239000007853 buffer solution Substances 0.000 claims abstract description 15
- 108010059892 Cellulase Proteins 0.000 claims abstract description 13
- 229940106157 cellulase Drugs 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 239000002344 surface layer Substances 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 7
- 238000003892 spreading Methods 0.000 claims abstract description 7
- 230000007480 spreading Effects 0.000 claims abstract description 7
- 238000005303 weighing Methods 0.000 claims abstract description 7
- 238000013329 compounding Methods 0.000 claims abstract description 6
- 238000007731 hot pressing Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000004537 pulping Methods 0.000 claims abstract description 6
- 229920002678 cellulose Polymers 0.000 claims description 30
- 239000001913 cellulose Substances 0.000 claims description 30
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 21
- 239000007864 aqueous solution Substances 0.000 claims description 21
- 239000006185 dispersion Substances 0.000 claims description 20
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 238000002791 soaking Methods 0.000 claims description 12
- 230000002745 absorbent Effects 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 241000894006 Bacteria Species 0.000 claims description 10
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 9
- 239000008367 deionised water Substances 0.000 claims description 9
- 229910021641 deionized water Inorganic materials 0.000 claims description 9
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 claims description 8
- JQWHASGSAFIOCM-UHFFFAOYSA-M sodium periodate Chemical compound [Na+].[O-]I(=O)(=O)=O JQWHASGSAFIOCM-UHFFFAOYSA-M 0.000 claims description 8
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 7
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 6
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 5
- 229910002090 carbon oxide Inorganic materials 0.000 claims description 5
- 239000002071 nanotube Substances 0.000 claims description 5
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 4
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 4
- RNIHAPSVIGPAFF-UHFFFAOYSA-N Acrylamide-acrylic acid resin Chemical compound NC(=O)C=C.OC(=O)C=C RNIHAPSVIGPAFF-UHFFFAOYSA-N 0.000 claims description 3
- 229920002126 Acrylic acid copolymer Polymers 0.000 claims description 3
- -1 acrylic ester Chemical class 0.000 claims description 3
- 239000007822 coupling agent Substances 0.000 claims description 3
- MWGMEGAYPPQWFG-UHFFFAOYSA-N [SiH4].OC(=O)C=C Chemical compound [SiH4].OC(=O)C=C MWGMEGAYPPQWFG-UHFFFAOYSA-N 0.000 claims description 2
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 claims description 2
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 11
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- 239000011148 porous material Substances 0.000 description 6
- 210000001124 body fluid Anatomy 0.000 description 5
- 239000010839 body fluid Substances 0.000 description 5
- 239000002041 carbon nanotube Substances 0.000 description 5
- 229910021393 carbon nanotube Inorganic materials 0.000 description 5
- 239000012528 membrane Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 230000035699 permeability Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- 230000008961 swelling Effects 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 208000015181 infectious disease Diseases 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical group CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229920002334 Spandex Polymers 0.000 description 1
- 239000007983 Tris buffer Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 125000003172 aldehyde group Chemical group 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 150000004968 peroxymonosulfuric acids Chemical class 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920005614 potassium polyacrylate Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 239000004759 spandex Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
Classifications
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Abstract
The invention relates to the technical field of nursing pads, in particular to a soft and breathable adult nursing pad and a preparation process thereof. The method comprises the following steps: step 1: (1) Bacterial cellulose, alpha cellulose and aramid fiber are used as raw materials to prepare an aramid stock solution; (2) Coating aramid fiber stock solution on one surface of an ES fiber non-woven fabric, and solidifying and forming; obtaining a coated non-woven fabric; (3) Placing the coated non-woven fabric in an acetic acid buffer solution, adding cellulase, oscillating, washing and drying to obtain a diversion anti-seepage layer; step 2: (1) Weighing high liquid absorption resin, ES fiber and wood pulp fiber for standby; (2) Pulping wood pulp fibers to obtain a wood pulp solution with the weight percent of 5%, adding high-absorbent resin and ES fibers, and fully and uniformly mixing; spreading the liquid into a net to obtain a liquid absorption core layer; step 3: combining the soft surface layer, the diversion anti-seepage layer, the absorption core layer and the breathable bottom film, hot-pressing and compounding, and cutting to obtain the adult nursing pad.
Description
Technical Field
The invention relates to the technical field of nursing pads, in particular to a soft and breathable adult nursing pad and a preparation process thereof.
Background
The adult nursing pad is a common adult sanitary product, has the characteristics of comfort, adjustability and the like, and is widely used in places such as medical institutions, nursing homes, families and the like; the skin care product has the functions of absorbing and controlling urine or other body fluids, preventing leakage, keeping skin clean and dry, and reducing infection risk.
Adult care pads are typically composed of a top layer, a baffle layer, an absorbent layer, and a bottom layer; the diversion layer mainly directs the liquid flow to the next layer, so as to ensure the maximum absorption efficiency of the absorption layer. However, in the prior art, the diversion layer generally has only diversion effect, has no anti-rewet function, generally has larger pores, and when the body fluid amount is larger, the absorption rate of the absorption layer is lower, so that rewet can be generated, and the comfort level is reduced. On the other hand, the absorbent layer is usually composed of materials such as a high-molecular absorbent resin and wood pulp, and the liquid-absorbent resin has low retention force and poor swelling resistance, so that the air permeability and the liquid absorption are insufficient.
In summary, the adult care pad is a high-performance care device with wide application prospect, and innovative materials are required to be continuously explored to meet the continuously improved requirements of patients on comfort and rehabilitation effect.
Disclosure of Invention
The invention aims to provide a soft and breathable adult care cushion and a preparation process thereof, so as to solve the problems in the background art.
In order to solve the technical problems, the invention provides the following technical scheme:
a process for preparing a soft and breathable adult care pad, comprising the steps of:
step 1: (1) Bacterial cellulose, alpha cellulose and aramid fiber are used as raw materials to prepare an aramid stock solution; (2) Coating aramid fiber stock solution on one surface of an ES fiber non-woven fabric, and solidifying and forming; obtaining a coated non-woven fabric; (3) Placing the coated non-woven fabric in an acetic acid buffer solution, adding cellulase, oscillating, washing and drying to obtain a diversion anti-seepage layer;
step 2: (1) Weighing high liquid absorption resin, ES fiber and wood pulp fiber for standby; (2) Pulping wood pulp fibers to obtain a wood pulp solution with the weight percent of 5%, adding high-absorbent resin and ES fibers, and fully and uniformly mixing; spreading the liquid into a net to obtain a liquid absorption core layer;
step 3: combining the soft surface layer, the diversion anti-seepage layer, the absorption core layer and the breathable bottom film, hot-pressing and compounding, and cutting to obtain the adult nursing pad.
Further, the specific preparation process of the diversion anti-back-seepage layer comprises the following steps:
(1) Sequentially dispersing bacterial cellulose and alpha cellulose in deionized water to obtain cellulose dispersion liquid; sequentially dispersing potassium hydroxide and aramid fibers in a dimethyl sulfoxide solution to obtain an aramid dispersion; mixing the cellulose dispersion liquid and the aramid fiber dispersion liquid in equal volume, and homogenizing for 3-5 hours at 55-65 ℃ to obtain aramid fiber stock solution;
(2) Coating aramid stock solution on one surface of an ES fiber non-woven fabric, sequentially soaking the ES fiber non-woven fabric in 25-35 wt% of N-methyl pyrrolidone aqueous solution for 30-40 minutes, soaking the ES fiber non-woven fabric in 10-20 wt% of N-methyl pyrrolidone aqueous solution for 20-30 minutes, soaking the ES fiber non-woven fabric in 1-1.2 wt% of sodium hydroxide aqueous solution for 20-30 minutes, solidifying and molding, washing and drying to obtain a coated non-woven fabric;
(3) Immersing the coated non-woven fabric in acetic acid buffer solution with pH value of 5.5+/-0.2, adding cellulase, oscillating for 2-3 hours at 45-55 ℃, washing and drying to obtain the diversion anti-seepage layer.
Further, the raw materials of the aramid stock solution comprise the following components: 10-15 parts of bacterial cellulose, 35-40 parts of alpha cellulose, 38-43 parts of potassium hydroxide, 48-52 parts of aramid fiber, 50-60 parts of deionized water and 220-230 parts of dimethyl sulfoxide.
Further, the coating amount of the aramid stock solution is 3.5-4.5 g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The volume ratio of the coated non-woven fabric to the acetic acid buffer solution is 1:4; the ratio of cellulase to acetic acid buffer solution was 10mL:0.01g.
Further, the raw materials of the absorbent core layer comprise the following components: 20 to 28 weight percent of high absorbent resin, 12 to 20 weight percent of ES fiber and 60 weight percent of wood pulp fiber.
Further, the thickness of the absorbent core layer is 0.5-1 mm.
Further, the bacterial cellulose is modified in advance to obtain modified bacterial cellulose; taking modified bacterial cellulose, alpha cellulose and aramid fiber as raw materials to prepare an aramid stock solution;
the preparation process of the modified bacterial cellulose comprises the following steps: (1) Placing the carbon oxide nano tube in an ethanol water solution, adding acetic acid to adjust the pH value to be 4.5+/-0.2, adding an aminosilane coupling agent and an acrylate silane coupling agent, stirring for 0.5-1 hour at room temperature, washing and drying to obtain a modified carbon nano tube;
(2) Aldehyde-forming bacterial cellulose to obtain aldehyde-formed bacterial cellulose; (3) Adding bacterial cellulose into 0.09-0.11 mol/L sodium periodate solution, adding methanol, stirring for 2 hours at a temperature of between 30 and 40 ℃ in a dark place, washing and drying to obtain aldehyde bacterial cellulose;
(3) Dispersing the modified carbon nano tube in 1.8-2.2 wt% acetic acid aqueous solution, uniformly dispersing, adding aldehyde bacteria cellulose, stirring for 2-3 hours at 40-50 ℃, washing and drying to obtain the modified bacteria cellulose.
Further, in the raw material of the modified cellulose, the modified carbon nano tube accounts for 20-25 wt% of the aldehyde bacteria cellulose; the raw materials of the modified cellulose comprise the following components: 9 to 11 parts of carbon oxide nano tube, 9.5 to 10.5 parts of amino silane coupling agent and 4.5 to 5.5 parts of acrylic ester silane coupling agent.
Further, the high-liquid-absorption resin is an acrylamide-acrylic acid copolymer; the raw materials of the high-liquid-absorption resin comprise the following components: 48 to 55 parts of acrylic acid, 30 to 34 parts of sodium hydroxide, 13 to 16 parts of acrylamide, 2 to 3 parts of alpha cellulose, 5 to 7 parts of modified bacterial cellulose, 0.04 to 0.06 part of methylene bisacrylamide and 0.15 to 0.25 part of potassium persulfate.
Wherein the soft surface layer adopts a gram weight of 18-30 g/m 3 Is made of pearl cotton non-woven fabrics; the diversion anti-back seepage layer is prepared by coating an aramid fiber stock solution with an ES fiber non-woven fabric; the ES fiber non-woven fabric consists of 100% ES fibers with the gram weight of 30-40 g/m 2 It is subjected to laser drilling, and the drilling density is 150 pieces/cm 2 The average pore diameter is 50 μm; the breathable bottom film adopts the gram weight of 18-30 g/m 3 Polyolefin microporous membranes of (a).
In the technical scheme, the composite diversion anti-rewet layer is prepared for application in an adult nursing pad, and on the basis of guaranteeing diversion performance, the anti-rewet performance is improved, so that the comfort level of the nursing pad is improved.
The preparation of the diversion and infiltration layer is formed by taking the ES fiber non-woven fabric as a base and then coating the aramid fiber stock solution to form an aramid fiber coating film, wherein the ES fiber non-woven fabric has good air permeability and flexibility, and is a diversion channel; but it is poor in hydrophilicity, small in water absorption, difficult to keep dry for a long time, and poor in rewet resistance. Therefore, in the scheme, the aramid fiber stock solution is coated on one surface of the material to form an aramid fiber film for promoting absorption and diffusion, further enhancing the diversion dispersibility, reducing rewet, effectively reducing side leakage and enhancing rewet resistance.
The formation of the aramid fiber coating film is to take aramid fiber as a main framework, then mix bacterial cellulose and cellulose in alpha, and then solidify in a gradient solvent. Wherein, aramid fiber is a safe soft sanitary material, and its setting can increase air utilization in nursing pad inside, reduces patient's moist and the risk of infection, is difficult for causing harmful effect to the human body, and is difficult for breeding the bacterium. The coating is put into solvents with different concentrations to be solidified and molded, so as to form gradient pores; the contact surface with the ES fiber non-woven fabric and the inside of the aramid fiber coating film are porous, while the outer layer is more compact porous, and the rewet is reduced while the flow is guided by using the pore distribution. On the other hand, in order to further increase the pores, the flow guiding and the air permeability are promoted; in the scheme, cellulose in the membrane is degraded by cellulose in acetic acid solution, and small pores can be formed after degradation, so that the air permeability is increased, and the flow conductivity is enhanced; due to the degradation process, hydroxyl and carboxyl can remain after the glycosidic bond of cellulose is broken, so that the hydrophilicity is increased, the hygroscopicity of the membrane is improved, and the liquid absorption and diffusion properties are enhanced. In addition, compared with bacterial cellulose, the alpha cellulose is easier to degrade, so that the alpha cellulose is added in a larger amount in the scheme in order to improve the porosity formed by degradation.
Therefore, the ES fiber non-woven fabric has one surface as the ES fiber surface and one surface as the aramid fiber coating film surface, and the different hydrophilicities of the two sides are utilized, so that good absorption and anti-rewet effects are generated.
In a further scheme, bacterial cellulose is pretreated, the bacterial cellulose is aldehyde-formed, and the carbon nano tube is aminated, so that the carbon nano tube is grafted by utilizing the reaction of aldehyde groups and amino groups to obtain modified bacterial cellulose; the carbon nano tube has a certain antibacterial effect and can inhibit bacterial growth in body fluid. On the other hand, in the fiber cross-linked structure of the membrane, the absorption swelling resistance is increased, and the rewet resistance in the repeated absorption process is ensured.
In a further embodiment, the high-absorbent resin in the present embodiment is an acrylamide-acrylic acid copolymer incorporating modified bacterial cellulose and alpha cellulose; in the scheme, alpha cellulose is swelled, so that acrylic acid and acrylamide are copolymerized on alpha cellulose chains, and unsaturated groups in modified cellulose are utilized simultaneously, so that the alpha cellulose is grafted on copolymer species. The obtained high-liquid-absorption resin has higher liquid absorption and liquid retention capacity compared with common sodium polyacrylate serving as the liquid-absorption resin. As the modified cellulose is bacterial cellulose, the modified cellulose has unique morphological structure, high permeability and high water absorption. Meanwhile, the carbon nano tube not only strengthens the cross-linked network, but also generates more free volume and increases the water-retaining area. On the other hand, common body fluid contains sodium salt, after absorption, crosslinking can be generated, liquid absorption is reduced, and the introduction of modified bacterial cellulose effectively improves the absorption of body fluid containing sodium salt.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that the manufacturers of all the raw materials according to the present invention include, without any particular limitation: the model of the aminosilane coupling agent is KH-729, the model of the acrylate-based silane coupling agent is Dow Corning Z-6030, the CAS number of sodium periodate is 7790-29-5, the CAS number of acrylic acid is 79-10-7, the CAS number of acrylamide is 79-06-1, the CAS number of methylene bisacrylamide is 110-26-9, bacterial cellulose is in gel powder form, the diameter is 50-100 nm, and the length is 10000-20000; provided by caramarl; emamai fiberThe density of the element is 210-300 g/cm 3 Provided by Zibo permanent cell chemical industry sales limited company; the aramid fiber was aramid 1313, 1.5d×51mm, supplied by tabacco spandex stock, inc.
The soft surface layer adopts gram weight of 20g/m 3 Is made of pearl cotton non-woven fabrics; the gram weight of the ES fiber nonwoven fabric is 35g/m 2 The breathable bottom film adopts a gram weight of 25g/m 3 Polyolefin microporous membranes of (a); the thickness of the liquid absorbing layer is 0.8mm. Wherein the following parts are mass parts, 1 part is 100g.
The preparation process of the carbon oxide nano tube comprises the following steps: 0.1 part of carbon nanotubes was immersed in 1.5L of a mixed acid (65% concentrated nitric acid and 96% concentrated sulfuric acid in a volume ratio of 3:1), sonicated for 4 hours, stirred at 50℃for 24 hours, washed and dried, and then oxidized.
The preparation process of the modified bacterial cellulose comprises the following steps: 1 part of bacterial cellulose is added to 1.5 parts of 0.1mol/L sodium periodate solution, and 0.2 part of methanol is added; light shielding, stirring for 2 hours at 35 ℃, washing and drying to obtain the aldehyde bacteria cellulose; dispersing 0.3 part of modified carbon nano tube in 10 parts of 2wt% acetic acid aqueous solution, uniformly dispersing, adding 1.2 parts of aldehyde bacteria cellulose, stirring for 2 hours at 45 ℃, washing and drying to obtain the modified bacteria cellulose.
The preparation process of the high-liquid-absorption resin comprises the following steps: adding 5 parts of acrylic acid into 2 parts of deionized water, adding 8 parts of 40wt% sodium hydroxide aqueous solution, uniformly stirring, adding 1.5 parts of acrylamide and 0.7 part of modified bacterial cellulose, and uniformly mixing to obtain a mixed solution; adding 0.3 part of alpha cellulose into 100 parts of deionized water, swelling for 4 hours at 75 ℃, cooling to 40 ℃, adding the mixed solution under the nitrogen atmosphere, and stirring for 1.5 hours; heating to 55 ℃, adding 0.2 part of 10wt% aqueous persulfuric acid, stirring for 20 minutes, adding 0.05 part of 10wt% aqueous solution of methylene acrylamide, heating to 65 ℃ for reaction for 4 hours, filtering and drying to obtain the high-liquid-absorption resin.
Example 1:
step 1: (1) Sequentially dispersing 1.2 parts of modified bacterial cellulose and 3.8 parts of alpha cellulose in 50 parts of deionized water to obtain cellulose dispersion; sequentially dispersing 4 parts of potassium hydroxide and 5 parts of aramid fibers in 230 parts of dimethyl sulfoxide solution to obtain an aramid dispersion; mixing the cellulose dispersion liquid and the aramid fiber dispersion liquid in equal volume, and homogenizing for 4 hours at 60 ℃ to obtain an aramid fiber stock solution;
(2) Coating the aramid stock solution on one surface of the ES fiber non-woven fabric with the coating amount of 4g/m 2 Sequentially soaking the nonwoven fabric in 30wt% of N-methyl pyrrolidone aqueous solution for 40 minutes, soaking the nonwoven fabric in 15wt% of N-methyl pyrrolidone aqueous solution for 20 minutes, soaking the nonwoven fabric in 1wt% of sodium hydroxide aqueous solution for 20 minutes, solidifying and molding the nonwoven fabric, washing and drying the nonwoven fabric to obtain a coated nonwoven fabric;
(3) Immersing the coated non-woven fabric in an acetic acid buffer solution with pH=5.5, wherein the volume ratio is 1:4, adding cellulase (the ratio of the added amount of the cellulase to the acetic acid buffer solution is 10mL:0.01 g), oscillating for 2 hours at 50 ℃, washing and drying to obtain a diversion anti-seepage layer;
step 2: (1) Weighing 2.5 parts of high-absorbent resin, 1.5 parts of ES fibers and 6 parts of wood pulp fibers for later use; (2) Pulping wood pulp fibers to obtain a wood pulp solution with the weight percent of 5%, adding high-absorbent resin and ES fibers, and fully and uniformly mixing; spreading the liquid into a net to obtain a liquid absorption core layer;
step 3: combining the soft surface layer, the diversion anti-seepage layer, the absorption core layer and the breathable bottom film, hot-pressing and compounding, and cutting to obtain the adult nursing pad.
Example 2:
step 1: (1) Sequentially dispersing 1 part of modified bacterial cellulose and 4 parts of alpha cellulose in 50 parts of deionized water to obtain cellulose dispersion liquid; sequentially dispersing 3.8 parts of potassium hydroxide and 4.8 parts of aramid fibers in 230 parts of dimethyl sulfoxide solution to obtain an aramid dispersion; mixing the cellulose dispersion liquid and the aramid fiber dispersion liquid in equal volume, and homogenizing for 4 hours at 60 ℃ to obtain an aramid fiber stock solution;
(2) Coating the aramid stock solution on one surface of the ES fiber non-woven fabric with the coating amount of 4.5g/m 2 It was immersed in 30wt% of an aqueous solution of N-methylpyrrolidone for 40 minutes, 15wt% of an aqueous solution of N-methylpyrrolidone for 20 minutes, and 1wt% of the aqueous solution of N-methylpyrrolidoneImmersing in sodium hydroxide aqueous solution for 20 min, solidifying, washing and drying to obtain coated non-woven fabric;
(3) Immersing the coated non-woven fabric in an acetic acid buffer solution with pH=5.5, wherein the volume ratio is 1:4, adding cellulase (the ratio of the added amount of the cellulase to the acetic acid buffer solution is 10mL:0.01 g), oscillating for 2 hours at 50 ℃, washing and drying to obtain a diversion anti-seepage layer;
step 2: (1) Weighing 2 parts of high-absorbency resin, 2 parts of ES fibers and 6 parts of wood pulp fibers for later use; (2) Pulping wood pulp fibers to obtain a wood pulp solution with the weight percent of 5%, adding high-absorbent resin and ES fibers, and fully and uniformly mixing; spreading the liquid into a net to obtain a liquid absorption core layer;
step 3: combining the soft surface layer, the diversion anti-seepage layer, the absorption core layer and the breathable bottom film, hot-pressing and compounding, and cutting to obtain the adult nursing pad.
Example 3:
step 1: (1) Sequentially dispersing 1.5 parts of modified bacterial cellulose and 3.8 parts of alpha cellulose in 50 parts of deionized water to obtain cellulose dispersion; sequentially dispersing 4.3 parts of potassium hydroxide and 5.2 parts of aramid fibers in 230 parts of dimethyl sulfoxide solution to obtain an aramid dispersion; mixing the cellulose dispersion liquid and the aramid fiber dispersion liquid in equal volume, and homogenizing for 4 hours at 60 ℃ to obtain an aramid fiber stock solution;
(2) Coating the aramid stock solution on one surface of the ES fiber non-woven fabric with the coating amount of 3.5g/m 2 Sequentially soaking the nonwoven fabric in 30wt% of N-methyl pyrrolidone aqueous solution for 40 minutes, soaking the nonwoven fabric in 15wt% of N-methyl pyrrolidone aqueous solution for 20 minutes, soaking the nonwoven fabric in 1wt% of sodium hydroxide aqueous solution for 20 minutes, solidifying and molding the nonwoven fabric, washing and drying the nonwoven fabric to obtain a coated nonwoven fabric;
(3) Immersing the coated non-woven fabric in an acetic acid buffer solution with pH=5.5, wherein the volume ratio is 1:4, adding cellulase (the ratio of the added amount of the cellulase to the acetic acid buffer solution is 10mL:0.01 g), oscillating for 2 hours at 50 ℃, washing and drying to obtain a diversion anti-seepage layer;
step 2: (1) Weighing 2.8 parts of high-absorbent resin, 1.2 parts of ES fibers and 6 parts of wood pulp fibers for later use; (2) Pulping wood pulp fibers to obtain a wood pulp solution with the weight percent of 5%, adding high-absorbent resin and ES fibers, and fully and uniformly mixing; spreading the liquid into a net to obtain a liquid absorption core layer;
step 3: combining the soft surface layer, the diversion anti-seepage layer, the absorption core layer and the breathable bottom film, hot-pressing and compounding, and cutting to obtain the adult nursing pad.
Comparative example 1: an ES fiber nonwoven fabric was directly used as a flow guiding layer, and the rest was the same as in example 1;
comparative example 2: the coating amount of the aramid fiber stock solution is 1g/m 2 The remainder was the same as in example 1.
Comparative example 3: the coating amount of the aramid fiber stock solution is 9g/m 2 The remainder was the same as in example 1.
Comparative example 4: bacterial cellulose was directly used in the aramid fiber stock solution, and the rest was the same as in example 1.
Comparative example 5: the remainder was the same as in example 1, except that potassium polyacrylate was used instead of the high-absorbent resin (supplied by the chemical technology Co., ltd. In Tosoh, hubei).
Experiment: performing liquid absorption experiments by using 0.9wt% sodium chloride solution, cutting the prepared adult nursing pad into a size of 140mm multiplied by 280mm at room temperature, spreading the size on an experiment table, taking 30mL sodium chloride solution, and dripping the 30mL sodium chloride solution into the front end of the nursing pad by using a funnel with an electromagnetic valve, wherein the distance between the front end and the nursing pad is 0.5cm; one drop was 5mL, at 2 minute intervals, 6 drops, and the product contact time and the complete absorption time were recorded to obtain the pipetting speed. After the dripping is finished, the mixture is placed for 2 minutes, standard absorbent paper is taken and weighed, the standard absorbent paper is placed on the surface of the mixture, the mixture is pressed for 10 seconds by using a 1Kg pressing block, the mixture is weighed again, and the rewet amount is obtained by two weighing calculation. The prepared adult care pad was cut to a size of 100mm×100mm, weighed, immersed in Tris buffer with ph=7.5, allowed to stand for 24 hours, then hung vertically without tension for 120s, weighed again, and calculated to obtain the liquid absorption. The data obtained are shown below:
experimental results: the data in the above table indicate that: after repeated liquid absorption, the liquid absorption can still be kept faster, and the diversion and anti-rewet layer prepared by the technical scheme has good diversion and anti-rewet properties. The data of example 1 is compared with the data of comparative examples 1 to 5, and in comparative example 1, since the ES fiber nonwoven fabric is directly used as the flow guiding layer, the flow guiding property and the rewet resistance are lowered. In comparative example 2, since the coating amount was 1g/m 2 The thickness of the aramid fiber coating film is reduced, so that the absorption and leakage resistance are affected, and the rewet resistance is reduced; in comparative example 3, the coating amount was 9g/m 2 The thickness of the aramid fiber coating film is increased, the conductivity is reduced, and the subsequent absorption rate is reduced. In comparative example 4, the bacterial cellulose was not modified, so that the flow conductivity was lowered, thereby lowering the subsequent absorption rate. In comparative example 5, since the high liquid absorbent resin was not used, the liquid absorption was lowered, so that the subsequent absorption rate and rewet amount were increased, and the liquid absorption was lowered.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A process for preparing a soft and breathable adult care pad, which is characterized by comprising the following steps: the method comprises the following steps:
step 1: (1) Bacterial cellulose, alpha cellulose and aramid fiber are used as raw materials to prepare an aramid stock solution; (2) Coating aramid fiber stock solution on one surface of an ES fiber non-woven fabric, and solidifying and forming; obtaining a coated non-woven fabric; (3) Placing the coated non-woven fabric in an acetic acid buffer solution, adding cellulase, oscillating, washing and drying to obtain a diversion anti-seepage layer;
step 2: (1) Weighing high liquid absorption resin, ES fiber and wood pulp fiber for standby; (2) Pulping wood pulp fibers to obtain a wood pulp solution with the weight percent of 5%, adding high-absorbent resin and ES fibers, and fully and uniformly mixing; spreading the liquid into a net to obtain a liquid absorption core layer;
step 3: combining the soft surface layer, the diversion anti-seepage layer, the absorption core layer and the breathable bottom film, hot-pressing and compounding, and cutting to obtain the adult nursing pad.
2. A process for preparing a soft, breathable adult care pad according to claim 1, wherein: the specific preparation process of the diversion anti-seepage layer comprises the following steps:
(1) Sequentially dispersing bacterial cellulose and alpha cellulose in deionized water to obtain cellulose dispersion liquid; sequentially dispersing potassium hydroxide and aramid fibers in a dimethyl sulfoxide solution to obtain an aramid dispersion; mixing the cellulose dispersion liquid and the aramid fiber dispersion liquid in equal volume, and homogenizing for 3-5 hours at 55-65 ℃ to obtain aramid fiber stock solution;
(2) Coating aramid stock solution on one surface of an ES fiber non-woven fabric, sequentially soaking the ES fiber non-woven fabric in 25-35 wt% of N-methyl pyrrolidone aqueous solution for 30-40 minutes, soaking the ES fiber non-woven fabric in 10-20 wt% of N-methyl pyrrolidone aqueous solution for 20-30 minutes, soaking the ES fiber non-woven fabric in 1-1.2 wt% of sodium hydroxide aqueous solution for 20-30 minutes, solidifying and molding, washing and drying to obtain a coated non-woven fabric;
(3) Immersing the coated non-woven fabric in acetic acid buffer solution with pH value of 5.5+/-0.2, adding cellulase, oscillating for 2-3 hours at 45-55 ℃, washing and drying to obtain the diversion anti-seepage layer.
3. A process for preparing a soft, breathable adult care pad according to claim 2, wherein: the raw materials of the aramid stock solution comprise the following components: 10-15 parts of bacterial cellulose, 35-40 parts of alpha cellulose, 38-43 parts of potassium hydroxide, 48-52 parts of aramid fiber, 50-60 parts of deionized water and 220-230 parts of dimethyl sulfoxide.
4. A process for preparing a soft, breathable adult care pad according to claim 2, wherein: the coating amount of the aramid stock solution is 3.5-4.5 g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The volume ratio of the coated non-woven fabric to the acetic acid buffer solution is 1:4; the ratio of cellulase to acetic acid buffer solution was 10mL:0.01g.
5. A process for preparing a soft, breathable adult care pad according to claim 1, wherein: the raw materials of the absorbent core layer comprise the following components: 20 to 28 weight percent of high absorbent resin, 12 to 20 weight percent of ES fiber and 60 weight percent of wood pulp fiber.
6. A process for preparing a soft, breathable adult care pad according to claim 1, wherein: the thickness of the absorption core layer is 0.5-1 mm.
7. A process for preparing a soft, breathable adult care pad according to claim 1, wherein: the bacterial cellulose is modified in advance to obtain modified bacterial cellulose; taking modified bacterial cellulose, alpha cellulose and aramid fiber as raw materials to prepare an aramid stock solution;
the preparation process of the modified bacterial cellulose comprises the following steps: (1) Placing the carbon oxide nano tube in an ethanol water solution, adding acetic acid to adjust the pH value to be 4.5+/-0.2, adding an aminosilane coupling agent and an acrylate silane coupling agent, stirring for 0.5-1 hour at room temperature, washing and drying to obtain a modified carbon nano tube;
(2) Aldehyde-forming bacterial cellulose to obtain aldehyde-formed bacterial cellulose; (3) Adding bacterial cellulose into 0.09-0.11 mol/L sodium periodate solution, adding methanol, stirring for 2 hours at a temperature of between 30 and 40 ℃ in a dark place, washing and drying to obtain aldehyde bacterial cellulose;
(3) Dispersing the modified carbon nano tube in 1.8-2.2 wt% acetic acid aqueous solution, uniformly dispersing, adding aldehyde bacteria cellulose, stirring for 2-3 hours at 40-50 ℃, washing and drying to obtain the modified bacteria cellulose.
8. The process for preparing a soft, breathable adult care pad of claim 7, wherein: in the raw materials of the modified cellulose, the modified carbon nano tube accounts for 20-25 wt% of the aldehyde bacteria cellulose; the raw materials of the modified cellulose comprise the following components: 9 to 11 parts of carbon oxide nano tube, 9.5 to 10.5 parts of amino silane coupling agent and 4.5 to 5.5 parts of acrylic ester silane coupling agent.
9. The process for preparing a soft, breathable adult care pad of claim 7, wherein: the high-liquid-absorption resin is an acrylamide-acrylic acid copolymer; the raw materials of the high-liquid-absorption resin comprise the following components: 48 to 55 parts of acrylic acid, 30 to 34 parts of sodium hydroxide, 13 to 16 parts of acrylamide, 2 to 3 parts of alpha cellulose, 5 to 7 parts of modified bacterial cellulose, 0.04 to 0.06 part of methylene bisacrylamide and 0.15 to 0.25 part of potassium persulfate.
10. An adult care pad prepared by the process of preparing a soft and breathable adult care pad according to any one of claims 1 to 9.
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| US20230002976A1 (en) * | 2019-12-23 | 2023-01-05 | Stora Enso Oyj | A method for coating a fibrous web, and a surface coated fibrous web |
| US12006633B2 (en) * | 2019-12-23 | 2024-06-11 | Stora Enso Oyj | Method for coating a fibrous web, and a surface coated fibrous web |
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