CN114272020B - Preparation method of deodorizing paper diaper - Google Patents
Preparation method of deodorizing paper diaper Download PDFInfo
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- CN114272020B CN114272020B CN202111598123.6A CN202111598123A CN114272020B CN 114272020 B CN114272020 B CN 114272020B CN 202111598123 A CN202111598123 A CN 202111598123A CN 114272020 B CN114272020 B CN 114272020B
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Abstract
The invention relates to the field of disposable sanitary products, and provides a preparation method of a deodorizing paper diaper, which comprises the steps of preparing a skin-friendly surface layer, preparing an absorbing layer, preparing a leakage-proof bottom layer, sequentially and compositely connecting the skin-friendly surface layer, the absorbing layer and the leakage-proof bottom layer, and then cutting the skin-friendly surface layer, the absorbing layer and the leakage-proof bottom layer into single products.
Description
Technical Field
The invention relates to the field of disposable sanitary products, in particular to a preparation method of a deodorizing paper diaper.
Background
Methods for removing off-flavors mainly include physical adsorption and chemical adsorption. The physical adsorption is also called van der waals adsorption because the force between the adsorbate molecule and the adsorbent molecule is intermolecular attractive force, i.e., van der waals force. Chemisorption, in turn, is the result of the chemical bond forces between the adsorbate and the adsorbent, involving the destruction and recombination of chemical bonds in the molecule. Chemisorption has the disadvantage of strong adsorption selectivity and the ability to produce chemically reactive species that are only adsorbed by the chemisorber. Activated carbon is a common material for purifying air, has the dual characteristics of physical adsorption and chemical adsorption, and can adsorb substances in the air so as to achieve the purpose of deodorizing. The adsorption principle is as follows: (1) The surface of the activated carbon is provided with numerous tiny pores, has a large surface area, can be fully contacted with impurities, and can adsorb the impurities into the pores in a physical adsorption mode. (2) The activated carbon surface contains a small amount of oxygen and hydrogen in the form of chemical bonds, functional groups, such as carboxyl groups, hydroxyl groups, phenols, etc., which can chemically react with the adsorbed substances to be aggregated to the surface of the activated carbon in combination with the adsorbed substances.
Chinese patent No.: 201921472845.5 an activated carbon paper diaper comprises a paper diaper and a protection wall, wherein the paper diaper comprises a surface layer, an absorption layer and a bottom film which are sequentially attached from top to bottom, the absorption layer comprises a mixed layer and a high-molecular water-absorbing resin layer, the mixed layer is formed by mixing activated carbon particles and fluff pulp, the high-molecular water-absorbing resin layer is arranged in the mixed layer, and an anti-seepage layer is arranged between the absorption layer and the bottom film. This panty-shape diapers utilize the adsorptivity of active carbon, adsorb harmful substance and peculiar smell gas in the panty-shape diapers and handle, improve the protection effect to skin to through with active carbon granule and fine fixed on fashioned fine hair thick liquid layer of active carbon granule, thereby effectively avoid the active carbon granule to take place the condition of drunkenness in the panty-shape diapers, ensure that the panty-shape diapers possess stable deodorization effect of disinfecting. Chinese patent No.: 201810711290.9 discloses a paper diaper of various functions, install first test paper on elasticity waist, the below is connected first paper of easily permeating, first paper of easily permeating is connected in the urine district, when the baby wears the paper diaper of this function various and urinates, urine will be passed on first test paper through first paper of easily permeating, first test paper runs into urine and will change color, so someone will know that the baby has urinated, will help her to become paper diaper, so that the red buttocks of baby has been solved, change untimely. Meanwhile, the active carbon is arranged on the lower layer of the paper diaper, and the active carbon can adsorb peculiar smell generated by the toilet to the greatest extent. However, adsorption of odor using activated carbon has the following problems: first, the commercial activated carbon has a relatively large particle size, and is uncomfortable to wear when applied to paper diapers. Secondly, the activated carbon is black, and the activated carbon is placed on the paper diaper, so that many consumers cannot accept the paper diaper.
In addition, the deodorizing paper diaper mainly depends on a deodorizing core body, and the traditional deodorizing core body is prepared by the following steps: firstly, spraying an adsorbent (such as active carbon particles) on the surface of fluff pulp, sizing the surface of an upper wrapping layer by a glue spraying device, then spraying a layer of super absorbent resin on the sizing surface, and compositing the upper wrapping layer with the fluff pulp after the upper wrapping layer is turned by 180 degrees; the lower wrapping layer is also subjected to the operation of sizing and spraying the super absorbent resin; the fluff pulp continues to be transported through a 180 degree turn and then compounded with the lower cover layer above it (as shown in fig. 1). In the preparation process, the fluff pulp is easy to throw out powder falling on the surface or in gaps of the fluff pulp due to high speed in the overturning process, a large amount of powder is scattered in the air to form flying dust, the health of workers is endangered, machine equipment is damaged, the environment is polluted, and the powder with a certain concentration in the air is easy to explode when meeting fire.
Disclosure of Invention
Therefore, the invention provides a preparation method of the deodorizing paper diaper aiming at the technical defects pointed out by the background technology.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
the preparation method of the deodorizing paper diaper comprises the steps of preparing a skin-friendly surface layer, preparing an absorption layer, preparing a leakage-proof bottom layer, and sequentially and compositely connecting the skin-friendly surface layer, the absorption layer and the leakage-proof bottom layer and then cutting the skin-friendly surface layer, the absorption layer and the leakage-proof bottom layer into single products, wherein the preparation of the absorption layer comprises the following steps:
(1) Uncoiling and online conveying a material serving as a lower wrapping layer, uniformly spraying a layer of high-water-absorptivity resin on the upper surface of the lower wrapping layer after sizing to form a lower high-water-absorptivity resin layer, continuously conveying the lower high-water-absorptivity resin layer to form an upper high-water-absorptivity resin layer by spraying a layer of high-water-absorptivity resin on the fluff pulp layer or the fluffy non-woven fabric layer, and compositing an upper wrapping layer on the upper surface of the upper high-water-absorptivity resin layer to obtain a composite core, wherein hot melt adhesives are sprayed between the lower high-water-absorptivity resin layer and the fluff pulp layer or the fluffy non-woven fabric layer, between the fluff pulp layer or the fluffy non-woven fabric layer and the upper high-water-absorptivity resin layer and between the upper wrapping layer;
(2) The lower non-woven fabric is uncoiled and transported on line, aluminum silicate powder is evenly sprayed after the upper surface of the lower non-woven fabric is glued, the lower non-woven fabric is transported continuously and is composited with the composite core on line, and hot melt adhesive is sprayed between the aluminum silicate powder and the lower wrapping layer;
(3) And (3) compositing the upper non-woven fabric with the composite core body, namely uncoiling the upper non-woven fabric, carrying out online transmission, and carrying out online compositing with an upper wrapping layer of the composite core body after sizing on the upper surface of the upper non-woven fabric.
The further improvement is that: the upper wrapping layer and the lower wrapping layer are non-woven fabrics, dust-free paper or wet strength paper.
The further improvement is that: the aluminosilicate powder spray amount is 20-500gsm.
The further improvement is that: the mesh number of the aluminosilicate powder is 200-1500 mesh.
In order to solve the above-mentioned technical defect, the invention also provides another technical scheme, specifically as follows: the preparation method of the deodorizing paper diaper comprises the steps of preparing a skin-friendly surface layer, preparing an absorption layer, preparing a leakage-proof bottom layer and sequentially and compositely connecting the skin-friendly surface layer, the absorption layer and the leakage-proof bottom layer and then cutting the skin-friendly surface layer, the absorption layer and the leakage-proof bottom layer into single products, wherein the preparation of the absorption layer comprises the following steps:
s1, forming a mixed layer of fluff pulp and high water absorbent resin by using a forming device, uncoiling and online transmitting a lower non-woven fabric, and online compounding the mixed layer of the fluff pulp and the high water absorbent resin after sizing the upper surface of the lower non-woven fabric;
s2, when the mixed layer of the fluff pulp and the high water-absorbing resin is conveyed to the lower part of a bin filled with aluminosilicate powder, the aluminosilicate powder falls into the mixed layer of the fluff pulp and the high water-absorbing resin through a spraying device;
s3, uncoiling and online transmitting the upper non-woven fabric, and online compounding the upper non-woven fabric with a mixed layer of fluff pulp and high-hydroscopicity resin after sizing the upper surface of the upper non-woven fabric.
The further improvement is that: the upper non-woven fabric and the lower non-woven fabric are made of composite fibers with a sheath-core structure, the mass ratio of a sheath layer to a core layer of the composite fibers is 35:65-65:35, and the sheath layer comprises the following raw materials in parts by weight: 15-25 parts of polyethylene, 45-65 parts of modified polyethylene and 1-4 parts of maleic anhydride grafted ethylene-octene copolymer, wherein the core layer is composed of 90-100 parts of polypropylene, 1.2-2.4 parts of maleic anhydride grafted polypropylene and 0.6-1.2 parts of ethylene-vinyl acetate copolymer.
The further improvement is that: the modified polyethylene is prepared by melting, extruding and granulating the following raw materials in parts by weight: 40-60 parts of polyethylene, 28-40 parts of nano montmorillonite, 25-32 parts of chitosan quaternary ammonium salt and 2-4 parts of dispersing agent.
The further improvement is that: the upper layer non-woven fabric and the lower layer non-woven fabric are obtained by the composite fiber through a water jet process or a thermal bonding process, the non-woven fabric is immersed in finishing liquid for 30-60min, the immersion temperature is 30-40 ℃, and finally the non-woven fabric is dried.
The further improvement is that: the finishing liquid comprises, by weight, 6-12% of tartaric acid, 10-20% of epsilon-polylysine, 1-3% of a coupling agent, 4-8% of ethanol, 3-6% of dodecyl dimethyl tertiary amine, 5-10% of polyvinylpyrrolidone and the balance of water.
By adopting the technical scheme, the invention has the beneficial effects that:
according to the technical scheme, the defect that dust flies in the production and processing processes of the traditional deodorizing core body is overcome, air pollution and body harm to operators are avoided, and the environment of a production workshop is improved. The aluminosilicate has strong adsorption capacity and ultrahigh affinity to polar molecules, can be effectively adsorbed even under the condition of low concentration, and the main factors of odor generation of stool are indole, skatole, hydrogen sulfide and ammonia gas, and the substances are just polar molecules, so that the aluminosilicate can be utilized to the greatest extent, and the effect of removing the odor is achieved.
The composite fiber has a sheath-core structure, and the physical and chemical characteristics of the raw materials are fully exerted by adjusting and optimizing the raw material composition and the content of the sheath layer and the core layer, and the raw materials are mutually promoted, so that the prepared non-woven fabric has good antibacterial property and mechanical property. The maleic anhydride grafted ethylene-octene copolymer is added into the skin raw material, so that the toughness of the system is improved; the maleic anhydride grafted polypropylene and the ethylene-vinyl acetate copolymer are added into the core layer raw material, so that the softness and mechanical property of the system are improved. In addition, the addition of the maleic anhydride grafted ethylene-octene copolymer and the maleic anhydride grafted polypropylene can also effectively improve the compatibility of the raw materials between the core layer and the skin layer and in the core layer and the skin layer, so that the adhesive force between the composite fiber skin layer and the core layer is enhanced, the composite fiber skin layer is tightly combined, and the strength and the toughness of the composite fiber are improved.
In order to endow the upper layer non-woven fabric and the lower layer non-woven fabric with excellent antibacterial performance, the invention starts from the following aspects that firstly, modified polyethylene is added into a skin layer, and the modified polyethylene is prepared by melting, extruding and granulating the following raw materials in parts by weight: 40-60 parts of polyethylene, 28-40 parts of nano montmorillonite, 25-32 parts of chitosan quaternary ammonium salt and 2-4 parts of dispersing agent, wherein the chitosan quaternary ammonium salt has good antibacterial and bacteriostatic properties of the quaternary ammonium salt, meanwhile, the original good film forming property, biocompatibility and degradability of chitosan are reserved, the nano montmorillonite has the characteristics of being porous and large in specific surface area, the nano montmorillonite can be covalently grafted with the chitosan quaternary ammonium salt, and the nano montmorillonite is used as an inorganic material and has antibacterial and bacteriostatic properties, and after being grafted and modified with the chitosan quaternary ammonium salt, the inorganic material is organized, so that the antibacterial effect is improved. Second, after finishing treatment, the antibacterial property of the non-woven fabric is further improved. Epsilon-polylysine in the finishing liquid can damage the normal structure of large bacterial cells, degrade cellular proteins, interfere protein synthesis and even cause protein aggregation, inhibit the activity of bacterial enzymes, destroy the cellular DNA structure and interfere the normal synthesis of DNA. The carboxyl functional group of tartaric acid can be combined with amino in the molecular structure of enzyme in microbial cells to inhibit the activity of the enzyme, so that the normal physiological activities of the microorganisms are disturbed, and the breeding of microbial cells is reduced. Tartaric acid and epsilon-polylysine are mutually promoted, and the epsilon-polylysine damages the cell membrane structure, so that substances in cells flow out, the combination probability of the tartaric acid and enzyme is increased, and the antibacterial effect is improved. The dodecyl dimethyl tertiary amine is added into the finishing liquid, so that the antibacterial property is slightly improved, and the antibacterial property is probably due to the fact that tartaric acid reacts with the dodecyl dimethyl tertiary amine, the molecular structure of a reaction product is provided with positively charged nitrogen atoms, and the positively charged nitrogen atoms are combined with negatively charged microorganisms through electrostatic force to break the normal activity of cells, so that the growth of the microorganisms is frustrated and the microorganisms die.
Drawings
FIG. 1 is a flow chart of a conventional deodorizing core production process;
FIG. 2 is a schematic view showing the structure of an absorbent layer in example 1 of the present invention;
FIG. 3 is a schematic structural view of the composite core in example 1;
fig. 4 is a schematic view showing the structure of an absorbent layer in example 2 of the present invention.
The meaning of the labels in fig. 1 is as follows: a-fluff pulp; b-a glue spraying device; c-upper wrapping layer; d-a superabsorbent resin; e-lower wrapping layer.
Detailed Description
The following describes embodiments of the present invention in detail with reference to specific examples, so as to solve the technical problem by applying the technical means to the present invention, and the implementation process for achieving the technical effect can be fully understood and implemented accordingly.
Unless otherwise indicated, the technical means employed in the examples are conventional means well known to those skilled in the art, and the reagents and products employed are also commercially available. The sources of the reagents used, the trade names and the members of the list of constituents which are necessary are all indicated at the first occurrence.
Example 1
The preparation method of the deodorizing paper diaper comprises the steps of preparing a skin-friendly surface layer, preparing an absorption layer, preparing a leakage-proof bottom layer, and sequentially and compositely connecting the skin-friendly surface layer, the absorption layer and the leakage-proof bottom layer and then cutting the skin-friendly surface layer, the absorption layer and the leakage-proof bottom layer into single products, wherein the preparation of the absorption layer comprises the following steps:
(1) Uncoiling dust-free paper serving as a lower wrapping layer, carrying out on-line transmission, uniformly spraying a layer of high-absorbent resin after sizing the upper surface of the lower wrapping layer to form a lower high-absorbent resin layer, continuously transmitting the lower high-absorbent resin layer to form a composite fluff pulp layer, spraying a layer of high-absorbent resin on the fluff pulp layer to form an upper high-absorbent resin layer, and compositing an upper wrapping layer on the upper surface of the upper high-absorbent resin layer, wherein the upper wrapping layer is also dust-free paper to obtain a composite core, and hot melt adhesives are sprayed between the lower high-absorbent resin layer and the fluff pulp layer, between the fluff pulp layer and the upper high-absorbent resin layer and between the upper high-absorbent resin layer and the upper wrapping layer;
(2) The lower non-woven fabric is uncoiled and transported on line, aluminum silicate powder is evenly sprayed after the upper surface of the lower non-woven fabric is glued, the lower non-woven fabric is transported continuously and is composited with the composite core on line, and hot melt adhesive is sprayed between the aluminum silicate powder and the lower wrapping layer;
(3) And (3) compositing the upper non-woven fabric with the composite core body, namely uncoiling the upper non-woven fabric, carrying out online transmission, and carrying out online compositing with an upper wrapping layer of the composite core body after sizing on the upper surface of the upper non-woven fabric.
The absorbent layer structure of this embodiment refers to fig. 2, and the meaning of the marks in fig. 2 is as follows: 1-a lower layer of non-woven fabric; 2-aluminosilicate powder; 3-a composite core; 4-upper layer non-woven fabrics. The structure of the composite core referring to fig. 3, comprises an upper wrapping layer 31, an upper superabsorbent resin layer 32, a fluff pulp layer 33, a lower superabsorbent resin layer 34, and a lower wrapping layer 35 from top to bottom.
The upper wrapping layer and the lower wrapping layer can be non-woven fabrics or wet strength paper besides dust-free paper.
The aluminosilicate powder spray amount is 20 to 500gsm, for example 20gsm, 30gsm, 40gsm, 50gsm, 60gsm, 70gsm, 80gsm, 90gsm, 100gsm, 110gsm, 120gsm, 130gsm, 140gsm, 150gsm, 160gsm, 170gsm, 180gsm, 190gsm, 200gsm, 250gsm, 300gsm, 350gsm, 400gsm, 450gsm, 500gsm, and the spray amount of this embodiment is 200gsm. The mesh number of the aluminosilicate powder is 200-1500 mesh, for example 200 mesh, 300 mesh, 400 mesh, 500 mesh, 600 mesh, 700 mesh, 800 mesh, 900 mesh, 1000 mesh, 1100 mesh, 1200 mesh, 1300 mesh, 1400 mesh, 1500 mesh, and the mesh number of the aluminosilicate powder of this embodiment is 400 mesh. The fluff pulp layer may also be replaced by a fluff nonwoven layer.
The upper non-woven fabric and the lower non-woven fabric are made of composite fibers with sheath-core structures, the mass ratio of the sheath layer to the core layer of the composite fibers is 35:65, and the preparation method comprises the following specific steps:
(1) Preparation of modified polyethylene
Weighing the following raw materials in parts by weight: 40 parts of polyethylene, 28 parts of nano montmorillonite, 25 parts of chitosan quaternary ammonium salt and 2 parts of dispersing agent, and uniformly mixing, and then carrying out melt extrusion granulation to obtain modified polyethylene;
(2) Preparation of composite fibers:
weighing the following raw materials in parts by weight: 15 parts of polyethylene, 45 parts of modified polyethylene and 1 part of maleic anhydride grafted ethylene-octene copolymer are fed into a screw extruder to be melted into a skin mixed melt;
weighing the following raw materials in parts by weight: 90 parts of polypropylene, 1.2 parts of maleic anhydride grafted polypropylene and 0.6 part of ethylene-vinyl acetate copolymer are fed into a screw extruder to be melted into a core layer mixed melt;
sending the sheath mixed melt and the core mixed melt into a composite spinning machine, distributing the melt, spraying the melt from a composite spinneret plate to form a filament with a sheath-core structure, and then carrying out air-blast cooling, oiling, bundling, stretching, heat setting, crimping and cutting to obtain composite fibers;
(3) Preparation of spunlaced nonwoven fabric
Taking composite fibers as raw materials, and obtaining non-woven fabrics through the working procedures of opening, carding, lapping, drafting, hydroentangling and drying;
in addition to the hydroentanglement process, the composite fibers may also be thermally bonded to make nonwoven fabrics.
(4) Post-finishing
Soaking the spunlaced non-woven fabric in the finishing liquid for 30min at 40 ℃, and finally drying. The finishing liquid comprises the following raw materials in percentage by weight, 6% of tartaric acid, 10% of epsilon-polylysine, 1% of vinyl triethoxysilane, 4% of ethanol, 3% of dodecyl dimethyl tertiary amine, 5% of polyvinylpyrrolidone and the balance of water.
Example 2
The preparation method of the deodorizing paper diaper comprises the steps of preparing a skin-friendly surface layer, preparing an absorption layer, preparing a leakage-proof bottom layer and sequentially and compositely connecting the skin-friendly surface layer, the absorption layer and the leakage-proof bottom layer and then cutting the skin-friendly surface layer, the absorption layer and the leakage-proof bottom layer into single products, and is different from example 1 in that: the preparation process of the upper layer non-woven fabric and the lower layer non-woven fabric used in the absorption layer. The upper non-woven fabric and the lower non-woven fabric are made of composite fibers with a sheath-core structure, the mass ratio of the sheath layer to the core layer of the composite fibers is 50:50, and the preparation method comprises the following specific steps:
(1) Preparation of modified polyethylene
Weighing the following raw materials in parts by weight: 50 parts of polyethylene, 35 parts of nano montmorillonite, 28 parts of chitosan quaternary ammonium salt and 3 parts of dispersing agent, and uniformly mixing, and then carrying out melt extrusion granulation to obtain modified polyethylene;
(2) Preparation of composite fibers:
weighing the following raw materials in parts by weight: 20 parts of polyethylene, 55 parts of modified polyethylene and 3 parts of maleic anhydride grafted ethylene-octene copolymer are fed into a screw extruder to be melted into a skin mixed melt;
weighing the following raw materials in parts by weight: 95 parts of polypropylene, 1.8 parts of maleic anhydride grafted polypropylene and 0.9 part of ethylene-vinyl acetate copolymer are fed into a screw extruder to be melted into a core layer mixed melt;
sending the sheath mixed melt and the core mixed melt into a composite spinning machine, distributing the melt, spraying the melt from a composite spinneret plate to form a filament with a sheath-core structure, and then carrying out air-blast cooling, oiling, bundling, stretching, heat setting, crimping and cutting to obtain composite fibers;
(3) Preparation of spunlaced nonwoven fabric
Taking composite fibers as raw materials, and obtaining non-woven fabrics through the working procedures of opening, carding, lapping, drafting, hydroentangling and drying;
(4) Post-finishing
Soaking the spunlaced non-woven fabric in the finishing liquid for 50min at 35 ℃, and finally drying. The finishing liquid comprises the following raw materials in percentage by weight, 9% of tartaric acid, 15% of epsilon-polylysine, 2% of vinyl tri (beta-methoxyethoxy) silane, 6% of ethanol, 5% of dodecyl dimethyl tertiary amine, 8% of polyvinylpyrrolidone and the balance of water.
Example 3
The preparation method of the deodorizing paper diaper comprises the steps of preparing a skin-friendly surface layer, preparing an absorption layer, preparing a leakage-proof bottom layer and sequentially and compositely connecting the skin-friendly surface layer, the absorption layer and the leakage-proof bottom layer, and is different from the embodiment 1 in that: the preparation process of the upper layer non-woven fabric and the lower layer non-woven fabric used in the absorption layer. The upper non-woven fabric and the lower non-woven fabric are made of composite fibers with sheath-core structures, the mass ratio of the sheath layer to the core layer of the composite fibers is 65:35, and the preparation method comprises the following specific steps:
(1) Preparation of modified polyethylene
Weighing the following raw materials in parts by weight: 60 parts of polyethylene, 40 parts of nano montmorillonite, 32 parts of chitosan quaternary ammonium salt and 4 parts of dispersing agent, and uniformly mixing, and then carrying out melt extrusion granulation to obtain modified polyethylene;
(2) Preparation of composite fibers:
weighing the following raw materials in parts by weight: 25 parts of polyethylene, 65 parts of modified polyethylene and 4 parts of maleic anhydride grafted ethylene-octene copolymer are fed into a screw extruder to be melted into a skin mixed melt;
weighing the following raw materials in parts by weight: 100 parts of polypropylene, 2.4 parts of maleic anhydride grafted polypropylene and 1.2 parts of ethylene-vinyl acetate copolymer are fed into a screw extruder to be melted into a core layer mixed melt;
sending the sheath mixed melt and the core mixed melt into a composite spinning machine, distributing the melt, spraying the melt from a composite spinneret plate to form a filament with a sheath-core structure, and then carrying out air-blast cooling, oiling, bundling, stretching, heat setting, crimping and cutting to obtain composite fibers;
(3) Preparation of spunlaced nonwoven fabric
Taking composite fibers as raw materials, and obtaining non-woven fabrics through the working procedures of opening, carding, lapping, drafting, hydroentangling and drying;
(4) Post-finishing
Soaking the spunlaced non-woven fabric in the finishing liquid for 60min at the soaking temperature of 30 ℃, and finally drying. The finishing liquid comprises the following raw materials in percentage by weight, 12% of tartaric acid, 20% of epsilon-polylysine, 3% of gamma-aminopropyl triethoxysilane, 8% of ethanol, 6% of dodecyl dimethyl tertiary amine, 10% of polyvinylpyrrolidone and the balance of water.
Example 4
The preparation method of the deodorizing paper diaper comprises the steps of preparing a skin-friendly surface layer, preparing an absorption layer, preparing a leakage-proof bottom layer and sequentially and compositely connecting the skin-friendly surface layer, the absorption layer and the leakage-proof bottom layer and then cutting the skin-friendly surface layer, the absorption layer and the leakage-proof bottom layer into single products, and is different from example 1 in that: a method for preparing an absorption layer. The method specifically comprises the following steps:
s1, forming a mixed layer of fluff pulp and high water absorbent resin by using a forming device, uncoiling and online transmitting a lower non-woven fabric, and online compounding the mixed layer of the fluff pulp and the high water absorbent resin after sizing the upper surface of the lower non-woven fabric;
s2, when the mixed layer of the fluff pulp and the high water-absorbing resin is conveyed below a storage bin filled with the aluminosilicate powder, the aluminosilicate powder falls into the mixed layer of the fluff pulp and the high water-absorbing resin through a spraying device, wherein the spraying device is a plurality of discharging spray guns which are arranged side by side, the height of each discharging spray gun from the mixed layer of the fluff pulp and the high water-absorbing resin is 50-200mm, and the air pressure of an air pressure control valve in each discharging spray gun is controlled to be 0.2-0.6MPa; the dust-raising phenomenon during spraying can be reduced by adjusting the height of the spray gun and controlling the air pressure, so that the aluminosilicate powder falls into the mixed layer of the fluff pulp and the high-water-absorptivity resin more than on the surface of the mixed layer of the fluff pulp and the high-water-absorptivity resin, and is not easy to blow up and throw out in the high-speed production process;
s3, uncoiling and online transmitting the upper non-woven fabric, and online compounding the upper non-woven fabric with a mixed layer of fluff pulp and high-hydroscopicity resin after sizing the upper surface of the upper non-woven fabric.
The absorbent layer structure of this embodiment refers to fig. 4, and the meaning of the marks in fig. 4 is as follows: 1-a lower layer of non-woven fabric; 2-aluminosilicate powder; 4-upper layer non-woven fabric; a mixed layer of 5-fluff pulp and a super absorbent resin.
Comparative example 1
The difference from example 1 is that the finishing step is omitted.
Comparative example 2
The difference from example 1 is that no tartaric acid was added to the finishing liquor.
Comparative example 3
The difference from example 1 is that the raw material component tartaric acid of the finishing liquor is replaced by succinic acid.
Comparative example 4
The difference from example 1 is that no dodecyldimethyl tertiary amine was added to the finishing liquor.
Comparative example 5
The difference from example 1 is that epsilon-polylysine is not added to the finishing liquor.
Comparative example 6
The difference from example 1 is that the raw material component epsilon-polylysine of the finishing liquor is replaced by tartaric acid in its entirety.
Comparative example 7
The difference from example 1 is that the maleic anhydride grafted ethylene-octene copolymer is replaced by a polyether polyurethane elastomer.
Comparative example 8
The difference from example 1 is that the maleic anhydride grafted ethylene-octene copolymer is replaced by a polyether polyurethane elastomer.
Performance testing
The tensile strength, elongation at break and antibacterial rate of the upper (lower) layer nonwoven fabrics prepared in examples 1 to 3 and comparative examples 1 to 8 were measured, and the results are shown in tables 1 to 2.
TABLE 1
As can be seen from table 1, the antibacterial effect of the nonwoven fabric can be significantly improved by performing the post-finishing process. The addition of tartaric acid in a proper proportion can improve the antibacterial rate of the non-woven fabric, probably because the carboxyl functional group of the tartaric acid can be combined with amino groups in the molecular structure of enzymes in microbial cells to inhibit the activity of the enzymes. Tartaric acid and epsilon-polylysine are mutually promoted, and the epsilon-polylysine damages the cell membrane structure, so that substances in cells flow out, the combination probability of the tartaric acid and enzyme is increased, and the antibacterial effect is improved. Compared with succinic acid, tartaric acid has better antibacterial effect after being added, probably because the molecular structure of tartaric acid contains nonpolar carbon chains and polar group hydroxyl groups, and the nonpolar carbon chains and the polar hydroxyl groups act together to destroy the cell structure of microorganisms, thereby leading to death of the microorganisms. The applicant has found that, by adding dodecyl dimethyl tertiary amine into the finishing liquid, the antibacterial property is improved to a small extent, probably because tartaric acid reacts with dodecyl dimethyl tertiary amine, and the molecular structure of the reaction product has positively charged nitrogen atoms, so that the reaction product is combined with negatively charged microorganisms through electrostatic force to break the normal activity of the cells, and the growth of the microorganisms is frustrated and the microorganisms die.
TABLE 2
From table 2, it can be seen that the addition of the maleic anhydride grafted ethylene-octene copolymer and the maleic anhydride grafted polypropylene can effectively improve the compatibility of the core layer and the skin layer and the raw materials in the core layer and the skin layer, thereby enhancing the adhesive force between the skin layer and the core layer of the composite fiber, ensuring that the skin layer and the core layer are tightly combined, and improving the strength and the toughness of the composite fiber.
The above description is illustrative of the embodiments using the present teachings, and is not intended to limit the scope of the present teachings to any particular modification or variation of the present teachings by those skilled in the art.
Claims (1)
1. The preparation method of the deodorizing paper diaper comprises the steps of preparing a skin-friendly surface layer, preparing an absorption layer, preparing a leakage-proof bottom layer and sequentially and compositely connecting the skin-friendly surface layer, the absorption layer and the leakage-proof bottom layer and then cutting the skin-friendly surface layer, the absorption layer and the leakage-proof bottom layer into single products, and is characterized in that: the preparation of the absorption layer comprises the following steps:
s1, forming a mixed layer of fluff pulp and high water absorbent resin by using a forming device, uncoiling and online transmitting a lower non-woven fabric, and online compounding the mixed layer of the fluff pulp and the high water absorbent resin after sizing the upper surface of the lower non-woven fabric;
s2, when the mixed layer of the fluff pulp and the high water-absorbing resin is conveyed to the lower part of a bin filled with aluminosilicate powder, the aluminosilicate powder falls into the mixed layer of the fluff pulp and the high water-absorbing resin through a spraying device;
the spraying device is a plurality of discharging spray guns which are arranged side by side, the height of each discharging spray gun from the mixing layer of the fluff pulp and the high water absorbent resin is 50-200mm, and the air pressure of an air pressure control valve in each discharging spray gun is controlled to be 0.2-0.6MPa;
s3, uncoiling and online transmitting an upper non-woven fabric, online compounding the upper non-woven fabric with a mixed layer of fluff pulp and high-water-absorptivity resin after sizing the upper surface of the upper non-woven fabric, wherein the upper non-woven fabric and the lower non-woven fabric are made of composite fibers with a sheath-core structure, the mass ratio of a skin layer to a core layer of the composite fibers is 35:65-65:35, and the skin layer comprises the following raw materials in parts by weight: 15-25 parts of polyethylene, 45-65 parts of modified polyethylene and 1-4 parts of maleic anhydride grafted ethylene-octene copolymer, wherein the core layer is prepared by melting, extruding and granulating the following raw materials in parts by weight: 40-60 parts of polyethylene, 28-40 parts of nano montmorillonite, 25-32 parts of chitosan quaternary ammonium salt and 2-4 parts of dispersing agent;
the upper layer non-woven fabric and the lower layer non-woven fabric are prepared from composite fibers by a water jet process or a thermal bonding process, the non-woven fabric is immersed in a finishing liquid for 30-60min at the immersion temperature of 30-40 ℃ and finally dried, and the finishing liquid comprises the following raw materials, by weight, 6-12% of tartaric acid, 10-20% of epsilon-polylysine, 1-3% of a coupling agent, 4-8% of ethanol, 3-6% of dodecyl dimethyl tertiary amine, 5-10% of polyvinylpyrrolidone,
The balance being water.
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| CN115581792B (en) * | 2022-11-20 | 2023-12-19 | 上海护理佳实业有限公司 | Self-adhesive high-absorption material and absorption core |
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