CN111850830B - Alcohol-washing-resistant non-fading printing spunlaced nonwoven fabric - Google Patents
Alcohol-washing-resistant non-fading printing spunlaced nonwoven fabric Download PDFInfo
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- CN111850830B CN111850830B CN201910981026.1A CN201910981026A CN111850830B CN 111850830 B CN111850830 B CN 111850830B CN 201910981026 A CN201910981026 A CN 201910981026A CN 111850830 B CN111850830 B CN 111850830B
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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
- D04H1/44—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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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
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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
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
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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
- D04H1/44—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
- D04H1/48—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 in combination with at least one other method of consolidation
- D04H1/485—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 in combination with at least one other method of consolidation in combination with weld-bonding
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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
- D04H1/44—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
- D04H1/48—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 in combination with at least one other method of consolidation
- D04H1/49—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 in combination with at least one other method of consolidation entanglement by fluid jet in combination with another consolidation means
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- 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
- D06M13/207—Substituted carboxylic acids, e.g. by hydroxy or keto groups; Anhydrides, halides or salts thereof
- D06M13/21—Halogenated carboxylic acids; Anhydrides, halides or salts thereof
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- 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
- D06M13/322—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 nitrogen
- D06M13/325—Amines
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- 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
- D06M13/322—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 nitrogen
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- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
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Abstract
The invention discloses alcohol washing resistant non-fading printed spunlace nonwoven fabric, which is characterized in that an obtained corn fiber net and an alcohol resistant acrylic resin fiber net are sprayed with moisture in an atomizing mode, the fluffy fiber net is compacted, air in the fiber net is removed, the energy of water jet can be effectively absorbed after the fiber net enters a spunlace area, and finally, a wet corn fiber net and a wet alcohol resistant acrylic resin fiber net are obtained; laminating the obtained wet corn fiber net and the wet alcohol-resistant acrylic resin fiber net, wherein the number of the laminated layers is 3-6, trimming is carried out after the lamination is finished, so that the length and the width of the fiber net are consistent, and then the fiber net is used for later use; and (3) sending the laminated wet corn fiber web and the wet alcohol-resistant acrylic resin fiber web to a hot rolling mill for hot rolling at the temperature of 110-145 ℃ and at the pressure of 3-6MPa to obtain the alcohol washing-resistant non-fading printed spunlace nonwoven fabric. The invention can effectively improve the alcohol resistance and the fading prevention function of the non-woven fabric and prolong the service life of the non-woven fabric.
Description
Technical Field
The invention relates to the technical field of non-woven fabrics, in particular to an alcohol washing resistant non-fading printed spunlace non-woven fabric.
Background
Nonwoven fabrics, also known as nonwovens, are composed of oriented or random fibers. It is called a cloth because of its appearance and certain properties. The non-woven fabric has the characteristics of moisture resistance, air permeability, flexibility, light weight, no combustion supporting, easy decomposition, no toxicity or irritation, rich color, low price, recycling and the like. For example, the polypropylene (pp material) granules are mostly adopted as raw materials and are produced by a continuous one-step method of high-temperature melting, spinning, laying a line and hot-pressing coiling.
The existing preparation method of alcohol washing resistant non-fading printed spunlace nonwoven fabric generally comprises the steps of firstly manufacturing non-woven fabric without functionality, and then adding the non-woven fabric into finishing liquid with corresponding functions for impregnation, so that the non-woven fabric has short efficacy within a certain time, and the corresponding functions of the non-woven fabric are easy to lose after long-time use. Therefore, it is necessary to design a printed spunlaced nonwoven fabric which is resistant to alcohol washing and does not fade.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the alcohol-washing-resistant non-fading printed spunlaced nonwoven fabric, which can effectively improve the alcohol-resisting and fading-preventing functions of the nonwoven fabric and prolong the service life of the nonwoven fabric.
In order to achieve the purpose, the invention provides the following technical scheme: an alcohol-washing-resistant non-fading printed spunlace nonwoven fabric specifically comprises the following steps:
the method comprises the following steps of extracting corn fiber:
s1, fluffing the corn fibers on a combined opening and picking machine, removing impurities in the corn fibers, carding the corn fibers by using comb teeth to arrange the corn fibers in order, further extracting short fibers and impurities in the corn fibers, soaking the corn fibers in a color fixing agent for 1-2 hours, and drying;
s2, enabling the corn fiber to pass through the inclined curtain to the transverse curtain at the top end, then enabling the corn fiber to downwards enter the vertical clamping curtain, driving the clamping curtain to swing back and forth by the pulley, enabling the thin fiber web to do transverse reciprocating motion on the net forming curtain, and overlapping the thin fiber web to be 0.1-0.5mm thick to obtain a primary material;
s3, stretching the obtained initial material regularly and elastically, namely stretching for 2mm each time, relaxing for 1mm, repeating for more than 10 times, and finally obtaining a corn fiber net;
step two, preparing the alcohol-resistant acrylic resin, specifically:
s1, adding methyl methacrylate, butyl methacrylate and methacrylic acid into a four-neck flask with a molar mass ratio of 6.0-8.0: 2.0-2.5: 1 under the protection of nitrogen, heating to 110-;
s2, adding the mixture of dibenzoyl peroxide and tert-butyl peroxybenzoate into a four-neck flask according to the molar mass ratio of 3: 1, dropwise adding the mixture at a constant speed, heating to 145 ℃ at a temperature of 130-;
s3, preserving heat for 2 hours at 130 ℃, wherein the molar mass ratio is 2: 1, selecting a mixed solution of a polyurethane thickener and butyl acetate, heating to 145-155 ℃, preserving heat and refluxing for 2 hours, cooling and discharging to obtain a premixed mixture;
s4, adding the premixed mixture into a screw extruder, heating, melting and extruding, extruding the melt through the screw extruder, then feeding the melt into a spinning assembly through a metering pump, and extruding a trickle from a spinning nozzle, wherein the trickle of the melt is drawn and cooled to form an alcohol-resistant acrylic resin fiber net;
step three, preparing the wet fiber net, specifically:
the obtained corn fiber net and the alcohol-resistant acrylic resin fiber net are sprayed with moisture in an atomizing mode, the fluffy fiber net is compacted, air in the fiber net is removed, the fiber net can effectively absorb energy of water jet after entering a spunlace area, and finally, the wet corn fiber net and the wet alcohol-resistant acrylic resin fiber net are obtained;
step four, stacking the wet fiber nets, which specifically comprises the following steps:
laminating the obtained wet corn fiber net and the wet alcohol-resistant acrylic resin fiber net, wherein the number of the laminated layers is 3-6, trimming is carried out after the lamination is finished, so that the length and the width of the fiber net are consistent, and then the fiber net is used for later use;
step five, forming the alcohol washing resistant non-fading printed spunlaced nonwoven fabric, which specifically comprises the following steps:
and (3) conveying the laminated wet corn fiber net and the wet alcohol-resistant acrylic resin fiber net into a hot rolling mill for hot rolling at the temperature of 110-145 ℃ and under the pressure of 3-6MPa to obtain the alcohol washing-resistant non-fading printed spunlace nonwoven fabric.
According to the technical scheme, the preparation of the color fixing agent specifically comprises the following steps:
adding diethylenetriamine, sodium polyacrylate, partial hexamethylenediamine and deionized water into a reaction container, heating while stirring to 45-55 ℃, slowly dropwise adding difluorosalicylic acid for addition reaction, wherein the dropwise adding time is 2.5-3h, continuing the heat preservation reaction for 30-40min after the dropwise adding is finished, dropwise adding the rest hexamethylenediamine solution for 0.5-1h, continuing the heat preservation reaction for 3-4h after the dropwise adding is finished, cooling to below 40 ℃, and adding hydrochloric acid to adjust the pH value to 5-6 to obtain the color fixing agent.
According to the technical scheme, the part added in the early stage of the hexamethylene diamine accounts for 25-35% of the total weight of the hexamethylene diamine, and the temperature of the heat preservation reaction is 50 ℃.
According to the technical scheme, the preparation of the butyl methacrylate specifically comprises the following steps:
firstly, hydrolyzing methacrylamide sulfate into methacrylic acid, wherein the method comprises the following steps: methacrylamide sulfate, water and phenothiazine in a ratio of 1: 0.255: 0.0001 were heated to boiling and refluxed for one hour, then methacrylic acid was distilled off under reduced pressure, the distillate was then esterified with 0.05% phenothiazine as polymerization inhibitor, and methacrylic acid and butanol were subsequently esterified to butyl esters by the method: adding methacrylic acid and butanol into the esterification kettle according to the molar ratio of 1:1.05, heating to 150-.
According to the technical scheme, the preparation of the polyurethane thickener specifically comprises the following steps:
firstly, adding polyethylene glycol into a 500mL three-neck flask provided with an electric stirrer, a thermometer and a nitrogen inlet and outlet, carrying out vacuum drying dehydration for 1h at 120 ℃, introducing dry nitrogen, cooling to 80-90 ℃, adding hexamethylene diisocyanate and isophorone diisocyanate, dropwise adding a proper amount of catalyst dibutyltin dilaurate, reacting for 1-2h at 80-85 ℃, adding a proper amount of aromatic amine or aliphatic alcohol, reacting for 12h at 80-85 ℃, adding a proper amount of deionized water, and preparing into a solution with 20% solid content to obtain the polyurethane thickener.
According to the technical scheme, the diameter of the screw extruder in the second step is 50mm, the temperature of the feeding section of the screw extruder is 240-255 ℃, and the temperature of the compression section of the screw extruder is 280-295 ℃.
According to the technical scheme, the temperature of the spinneret in the second step is 250-280 ℃, and the spray aperture of the spinneret is 230-250 nm.
The invention has the beneficial effects that:
1. according to the invention, the obtained wet corn fiber net and the wet alcohol-resistant acrylic resin fiber net are laminated, the number of the laminated layers is 3-6, so that the wet corn fiber net and the wet alcohol-resistant acrylic resin fiber net are distributed in a crossed manner, the formed non-woven fabric has good alcohol resistance and fading prevention functions, and the service life of the non-woven fabric is prolonged;
2. according to the invention, the corn fiber is soaked in the color fixing agent, the color fixing agent takes diethylenetriamine, sodium polyacrylate and hexamethylenediamine solution as main raw materials, and difluorobenzene salicylic acid as an auxiliary material, so that the color fixing performance of non-woven fabrics can be improved, and the non-woven fabrics are prevented from fading;
3. the forming of the alcohol-resistant acrylic resin fiber web takes methyl methacrylate, butyl methacrylate and methacrylic acid as main raw materials, and the special long-carbon-chain ester monomer of the alcohol-resistant acrylic resin fiber web obviously improves the alcohol resistance, so that the alcohol resistance of the non-woven fabric is effectively improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of the forming process of the alcohol washing resistant non-fading printed spunlaced nonwoven fabric of the invention.
Detailed Description
The following describes the present invention in further detail with reference to fig. 1.
Example 1: as shown in fig. 1, the present invention provides the following technical solutions: an alcohol-washing-resistant non-fading printed spunlace nonwoven fabric specifically comprises the following steps:
the method comprises the following steps of extracting corn fiber:
s1, fluffing the corn fibers on a combined opening and picking machine, removing impurities in the corn fibers, carding the corn fibers by using comb teeth to arrange the corn fibers in order, further extracting short fibers and impurities in the corn fibers, soaking the corn fibers in a color fixing agent for 1-2 hours, and drying;
s2, enabling the corn fiber to pass through the inclined curtain to the transverse curtain at the top end, then enabling the corn fiber to downwards enter the vertical clamping curtain, driving the clamping curtain to swing back and forth by the pulley, enabling the thin fiber web to do transverse reciprocating motion on the net forming curtain, and overlapping the thin fiber web to be 0.1-0.5mm thick to obtain a primary material;
s3, stretching the obtained initial material regularly and elastically, namely stretching for 2mm each time, relaxing for 1mm, repeating for more than 10 times, and finally obtaining a corn fiber net;
step two, preparing the alcohol-resistant acrylic resin, specifically:
s1, selecting methyl methacrylate, butyl methacrylate and methacrylic acid in a four-neck flask with a thermometer, a stirrer and a reflux condenser under the protection of nitrogen according to the molar mass ratio of 6.0: 2.0: 1, adding the methyl methacrylate, the butyl methacrylate and the methacrylic acid into the four-neck flask, and heating to 110-;
s2, adding the mixture of dibenzoyl peroxide and tert-butyl peroxybenzoate into a four-neck flask according to the molar mass ratio of 3: 1, dropwise adding the mixture at a constant speed, heating to 145 ℃ at a temperature of 130-;
s3, preserving heat for 2 hours at 130 ℃, wherein the molar mass ratio is 2: 1, selecting a mixed solution of a polyurethane thickener and butyl acetate, heating to 145-155 ℃, preserving heat and refluxing for 2 hours, cooling and discharging to obtain a premixed mixture;
s4, adding the premixed mixture into a screw extruder, heating, melting and extruding, extruding the melt through the screw extruder, then feeding the melt into a spinning assembly through a metering pump, and extruding a trickle from a spinning nozzle, wherein the trickle of the melt is drawn and cooled to form an alcohol-resistant acrylic resin fiber net;
step three, preparing the wet fiber net, specifically:
the obtained corn fiber net and the alcohol-resistant acrylic resin fiber net are sprayed with water in an atomizing mode, the fluffy fiber net is compacted, air in the fiber net is removed, the fiber net can effectively absorb the energy of water jet after entering a spunlace area, and finally, the wet corn fiber net and the wet alcohol-resistant acrylic resin fiber net are obtained;
step four, stacking the wet fiber nets, specifically:
laminating the obtained wet corn fiber net and the wet alcohol-resistant acrylic resin fiber net, wherein the number of the laminated layers is 3-6, trimming is carried out after the lamination is finished, so that the length and the width of the fiber net are consistent, and then the fiber net is used for later use;
step five, forming the alcohol-washing-resistant non-fading printed spunlaced nonwoven fabric, which specifically comprises the following steps:
and (3) conveying the laminated wet corn fiber net and the wet alcohol-resistant acrylic resin fiber net into a hot rolling mill for hot rolling at the temperature of 110-145 ℃ and under the pressure of 3-6MPa to obtain the alcohol washing-resistant non-fading printed spunlace nonwoven fabric.
According to the technical scheme, the preparation of the color fixing agent specifically comprises the following steps:
adding diethylenetriamine, sodium polyacrylate, partial hexamethylenediamine and deionized water into a reaction container, heating while stirring to 45-55 ℃, slowly dropwise adding difluorosalicylic acid for addition reaction, wherein the dropwise adding time is 2.5-3h, continuing the heat preservation reaction for 30-40min after the dropwise adding is finished, dropwise adding the rest hexamethylenediamine solution for 0.5-1h, continuing the heat preservation reaction for 3-4h after the dropwise adding is finished, cooling to below 40 ℃, and adding hydrochloric acid to adjust the pH value to 5-6 to obtain the color fixing agent.
According to the technical scheme, the part added at the early stage of the hexamethylene diamine accounts for 25-35% of the total weight of the hexamethylene diamine, and the temperature of the heat preservation reaction is 50 ℃.
According to the technical scheme, the preparation of the butyl methacrylate specifically comprises the following steps:
firstly, hydrolyzing methacrylamide sulfate into methacrylic acid, wherein the method comprises the following steps: methacrylamide sulfate, water and phenothiazine in a ratio of 1: 0.255: 0.0001 were heated to boiling and refluxed for one hour, then methacrylic acid was distilled off under reduced pressure, the distillate was then esterified with 0.05% phenothiazine as polymerization inhibitor, and methacrylic acid and butanol were subsequently esterified to butyl esters by the method: adding methacrylic acid and butanol into the esterification kettle according to the molar ratio of 1:1.05, heating to 150-.
According to the technical scheme, the preparation of the polyurethane thickener specifically comprises the following steps:
firstly, adding polyethylene glycol into a 500mL three-neck flask provided with an electric stirrer, a thermometer and a nitrogen inlet and outlet, carrying out vacuum drying dehydration for 1h at 120 ℃, introducing dry nitrogen, cooling to 80-90 ℃, adding hexamethylene diisocyanate and isophorone diisocyanate, dropwise adding a proper amount of catalyst dibutyltin dilaurate, reacting for 1-2h at 80-85 ℃, adding a proper amount of aromatic amine or aliphatic alcohol, reacting for 12h at 80-85 ℃, adding a proper amount of deionized water, and preparing into a solution with 20% solid content to obtain the polyurethane thickener.
According to the technical scheme, in the second step, the diameter of the screw extruder is 50mm, the temperature of the feeding section of the screw extruder is 240-255 ℃, and the temperature of the compression section of the screw extruder is 280-295 ℃.
According to the technical scheme, the temperature of the spinneret in the second step is 250-280 ℃, and the spray aperture of the spinneret is 230-250 nm.
Example 2: as shown in fig. 1, the present invention provides the following technical solutions: an alcohol-washing-resistant non-fading printed spunlace nonwoven fabric specifically comprises the following steps:
the method comprises the following steps of extracting corn fiber:
s1, fluffing the corn fibers on a combined opening and picking machine, removing impurities in the corn fibers, carding the corn fibers by using comb teeth to arrange the corn fibers in order, further extracting short fibers and impurities in the corn fibers, soaking the corn fibers in a color fixing agent for 1-2 hours, and drying;
s2, enabling the corn fiber to pass through the inclined curtain to the transverse curtain at the top end, then enabling the corn fiber to downwards enter the vertical clamping curtain, driving the clamping curtain to swing back and forth by the pulley, enabling the thin fiber web to do transverse reciprocating motion on the net forming curtain, and overlapping the thin fiber web to be 0.1-0.5mm thick to obtain a primary material;
s3, stretching the obtained initial material regularly and elastically, namely stretching for 2mm each time, relaxing for 1mm, repeating for more than 10 times, and finally obtaining a corn fiber net;
step two, preparing the alcohol-resistant acrylic resin, which comprises the following steps:
s1, selecting methyl methacrylate, butyl methacrylate and methacrylic acid in a four-neck flask with a thermometer, a stirrer and a reflux condenser under the protection of nitrogen according to the molar mass ratio of 8.0: 2.5: 1, adding the methyl methacrylate, the butyl methacrylate and the methacrylic acid into the four-neck flask, and heating to 110-;
s2, adding the mixture of dibenzoyl peroxide and tert-butyl peroxybenzoate into a four-neck flask according to the molar mass ratio of 3: 1, dropwise adding the mixture at a constant speed, heating to 145 ℃ at a temperature of 130-;
s3, preserving heat for 2h at 130 ℃, with the molar mass ratio of 2: 1, selecting a mixed solution of polyurethane thickener and butyl acetate, heating to 145-155 ℃, preserving heat and refluxing for 2h, cooling and discharging to obtain a premixed mixture;
s4, adding the premixed mixture into a screw extruder, heating, melting and extruding, extruding the melt through the screw extruder, then feeding the melt into a spinning assembly through a metering pump, and extruding a trickle from a spinning nozzle, wherein the trickle of the melt is drawn and cooled to form an alcohol-resistant acrylic resin fiber net;
step three, preparing the wet fiber net, specifically:
the obtained corn fiber net and the alcohol-resistant acrylic resin fiber net are sprayed with moisture in an atomizing mode, the fluffy fiber net is compacted, air in the fiber net is removed, the fiber net can effectively absorb energy of water jet after entering a spunlace area, and finally, the wet corn fiber net and the wet alcohol-resistant acrylic resin fiber net are obtained;
step four, stacking the wet fiber nets, which specifically comprises the following steps:
laminating the obtained wet corn fiber net and the wet alcohol-resistant acrylic resin fiber net, wherein the number of the laminated layers is 3-6, trimming is carried out after the lamination is finished, so that the length and the width of the fiber net are consistent, and then the fiber net is used for later use;
step five, forming the alcohol-washing-resistant non-fading printed spunlaced nonwoven fabric, which specifically comprises the following steps:
and (3) conveying the laminated wet corn fiber net and the wet alcohol-resistant acrylic resin fiber net into a hot rolling mill for hot rolling at the temperature of 110-145 ℃ and under the pressure of 3-6MPa to obtain the alcohol washing-resistant non-fading printed spunlace nonwoven fabric.
According to the technical scheme, the preparation of the color fixing agent specifically comprises the following steps:
adding diethylenetriamine, sodium polyacrylate, partial hexamethylenediamine and deionized water into a reaction container, heating while stirring to 45-55 ℃, slowly dropwise adding difluorosalicylic acid for addition reaction, wherein the dropwise adding time is 2.5-3h, continuing the heat preservation reaction for 30-40min after the dropwise adding is finished, dropwise adding the rest hexamethylenediamine solution for 0.5-1h, continuing the heat preservation reaction for 3-4h after the dropwise adding is finished, cooling to below 40 ℃, and adding hydrochloric acid to adjust the pH value to 5-6 to obtain the color fixing agent.
According to the technical scheme, the part added in the early stage of the hexamethylene diamine accounts for 25-35% of the total weight of the hexamethylene diamine, and the temperature of the heat preservation reaction is 50 ℃.
According to the technical scheme, the preparation of the butyl methacrylate specifically comprises the following steps:
firstly, hydrolyzing methacrylamide sulfate into methacrylic acid, wherein the method comprises the following steps: methacrylamide sulfate, water and phenothiazine in a ratio of 1: 0.255: 0.0001 were heated to boiling and refluxed for one hour, then methacrylic acid was distilled off under reduced pressure, the distillate was then esterified with 0.05% phenothiazine as polymerization inhibitor, and methacrylic acid and butanol were subsequently esterified to butyl esters by the method: adding methacrylic acid and butanol into the esterification kettle according to the molar ratio of 1:1.05, heating to 150-.
According to the technical scheme, the preparation of the polyurethane thickener specifically comprises the following steps:
firstly, adding polyethylene glycol into a 500mL three-neck flask provided with an electric stirrer, a thermometer and a nitrogen inlet and outlet, carrying out vacuum drying dehydration for 1h at 120 ℃, introducing dry nitrogen, cooling to 80-90 ℃, adding hexamethylene diisocyanate and isophorone diisocyanate, dropwise adding a proper amount of catalyst dibutyltin dilaurate, reacting for 1-2h at 80-85 ℃, adding a proper amount of aromatic amine or aliphatic alcohol, reacting for 12h at 80-85 ℃, adding a proper amount of deionized water, and preparing into a solution with 20% solid content to obtain the polyurethane thickener.
According to the technical scheme, in the second step, the diameter of the screw extruder is 50mm, the temperature of the feeding section of the screw extruder is 240-255 ℃, and the temperature of the compression section of the screw extruder is 280-295 ℃.
According to the technical scheme, the temperature of the spinneret in the second step is 250-280 ℃, and the spray aperture of the spinneret is 230-250 nm.
Experimental example:
alcohol-resistant acrylic resin fiber web test index table:
the experimental results show that the alcohol-resistant acrylic resin fiber net prepared by the invention has good alcohol resistance and good washability.
When the wet corn fiber net and the wet alcohol-resistant acrylic resin fiber net are used, the obtained wet corn fiber net and the wet alcohol-resistant acrylic resin fiber net are laminated, the number of the laminated layers is 3-6, so that the wet corn fiber net and the wet alcohol-resistant acrylic resin fiber net are distributed in a crossed manner, the formed non-woven fabric has good alcohol resistance and fading resistance, and the service life of the non-woven fabric is prolonged;
according to the invention, the corn fiber is soaked in the color fixing agent, the color fixing agent takes diethylenetriamine, sodium polyacrylate and hexamethylenediamine solution as main raw materials, and difluorobenzene salicylic acid as an auxiliary material, so that the color fixing performance of the non-woven fabric can be improved, and the non-woven fabric is prevented from fading;
the forming of the alcohol-resistant acrylic resin fiber web takes methyl methacrylate, butyl methacrylate and methacrylic acid as main raw materials, and the special long-carbon-chain ester monomer of the alcohol-resistant acrylic resin fiber web obviously improves the alcohol resistance, so that the alcohol resistance of the non-woven fabric is effectively improved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides an alcohol-resistant washing does not fade stamp spunlace nonwoven cloth which characterized in that: the preparation method comprises the following steps:
the method comprises the following steps of extracting corn fiber:
s1, fluffing the corn fibers on a combined opening and picking machine, removing impurities in the corn fibers, carding the corn fibers by using comb teeth to arrange the corn fibers in order, further removing short fibers and impurities in the corn fibers, soaking the corn fibers in a color fixing agent for 1-2 hours, and drying; the preparation of the color fixing agent specifically comprises the following steps: adding diethylenetriamine, sodium polyacrylate, partial hexamethylenediamine and deionized water into a reaction container, heating while stirring to 45-55 ℃, slowly dropwise adding difluorosalicylic acid for addition reaction, wherein the dropwise adding time is 2.5-3h, continuing the heat preservation reaction for 30-40min after the dropwise adding is finished, dropwise adding the rest hexamethylenediamine solution for 0.5-1h, continuing the heat preservation reaction for 3-4h after the dropwise adding is finished, cooling to below 40 ℃, and adding hydrochloric acid to adjust the pH value to 5-6 to obtain a color fixing agent;
s2, enabling the corn fiber to pass through the inclined curtain to the transverse curtain at the top end, then enabling the corn fiber to downwards enter the vertical clamping curtain, driving the clamping curtain to swing back and forth by the pulley, enabling the thin fiber web to do transverse reciprocating motion on the net forming curtain, and overlapping the thin fiber web to be 0.1-0.5mm thick to obtain a primary material;
s3, stretching the obtained initial material regularly and elastically, namely stretching for 2mm each time, relaxing for 1mm, repeating for more than 10 times, and finally obtaining a corn fiber net;
step two, preparing the alcohol-resistant acrylic resin, specifically:
s1, adding methyl methacrylate, butyl methacrylate and methacrylic acid into a four-neck flask with a molar mass ratio of 6.0-8.0: 2.0-2.5: 1 under the protection of nitrogen, heating to 110-;
s2, adding the mixture of dibenzoyl peroxide and tert-butyl peroxybenzoate into a four-neck flask according to the molar mass ratio of 3: 1, dropwise adding the mixture at a constant speed, heating to 145 ℃ at a temperature of 130-;
s3, preserving heat for 2 hours at 130 ℃, wherein the molar mass ratio is 2: 1, selecting a mixed solution of a polyurethane thickener and butyl acetate, heating to 145-155 ℃, preserving heat and refluxing for 2 hours, cooling and discharging to obtain a premixed mixture;
s4, adding the premixed mixture into a screw extruder, heating, melting and extruding, extruding the melt through the screw extruder, then feeding the melt into a spinning assembly through a metering pump, and extruding a trickle from a spinning nozzle, wherein the trickle of the melt is drawn and cooled to form an alcohol-resistant acrylic resin fiber net;
step three, preparing the wet fiber net, specifically:
the obtained corn fiber net and the alcohol-resistant acrylic resin fiber net are sprayed with water in an atomizing mode, the fluffy fiber net is compacted, air in the fiber net is removed, the fiber net can effectively absorb the energy of water jet after entering a spunlace area, and finally, the wet corn fiber net and the wet alcohol-resistant acrylic resin fiber net are obtained;
step four, stacking the wet fiber nets, specifically:
laminating the obtained wet corn fiber net and the wet alcohol-resistant acrylic resin fiber net, wherein the number of the laminated layers is 3-6, trimming is carried out after the lamination is finished, so that the length and the width of the fiber net are consistent, and then the fiber net is used for later use;
step five, forming the alcohol-washing-resistant non-fading printed spunlaced nonwoven fabric, which specifically comprises the following steps:
and (3) conveying the laminated wet corn fiber net and the wet alcohol-resistant acrylic resin fiber net into a hot rolling mill for hot rolling at the temperature of 110-145 ℃ and under the pressure of 3-6MPa to obtain the alcohol washing-resistant non-fading printed spunlace nonwoven fabric.
2. The alcohol wash resistant non-fading printed spunlace nonwoven fabric according to claim 1, wherein: the early-stage added part of the hexamethylene diamine is 25-35% of the total weight of the hexamethylene diamine, and the temperature of the heat preservation reaction is 50 ℃.
3. The alcohol wash resistant non-fading printed spunlace nonwoven fabric according to claim 1, wherein: the preparation of the butyl methacrylate specifically comprises the following steps:
firstly, hydrolyzing methacrylamide sulfate into methacrylic acid, wherein the method comprises the following steps: methacrylamide sulfate, water and phenothiazine in a ratio of 1: 0.255: 0.0001 were heated to boiling and refluxed for one hour, then methacrylic acid was distilled off under reduced pressure, the distillate was then esterified with 0.05% phenothiazine as polymerization inhibitor, and methacrylic acid and butanol were subsequently esterified to butyl esters by the method: adding methacrylic acid and butanol into the esterification kettle according to the molar ratio of 1:1.05, heating to 165 ℃ for esterification reaction for 2-4h, and continuously preserving the heat for 3h at 150 ℃ to obtain the butyl methacrylate.
4. The alcohol wash resistant non-fading printed spunlace nonwoven fabric according to claim 1, wherein: the preparation of the polyurethane thickener specifically comprises the following steps:
firstly, adding polyethylene glycol into a 500mL three-neck flask provided with an electric stirrer, a thermometer and a nitrogen inlet and outlet, carrying out vacuum drying dehydration for 1h at 120 ℃, introducing dry nitrogen, cooling to 80-90 ℃, adding hexamethylene diisocyanate and isophorone diisocyanate, dropwise adding a proper amount of catalyst dibutyltin dilaurate, reacting for 1-2h at 80-85 ℃, adding a proper amount of aromatic amine or aliphatic alcohol, reacting for 12h at 80-85 ℃, adding a proper amount of deionized water, and preparing into a solution with 20% solid content to obtain the polyurethane thickener.
5. The alcohol wash resistant non-fading printed spunlace nonwoven fabric according to claim 1, wherein: the diameter of the screw extruder in the second step is 50mm, the temperature of the feeding section of the screw extruder is 240-255 ℃, and the temperature of the compression section of the screw extruder is 280-295 ℃.
6. The alcohol wash resistant non-fading printed spunlace nonwoven fabric according to claim 1, wherein: the temperature of the spinneret in the second step is 250-280 ℃, and the spray aperture of the spinneret is 230-250 nm.
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