CN114262986B - Soft SMS water-repellent non-woven fabric and preparation method thereof - Google Patents
Soft SMS water-repellent non-woven fabric and preparation method thereof Download PDFInfo
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Abstract
The application relates to the field of non-woven fabrics, and particularly discloses a soft SMS water-repellent non-woven fabric and a preparation method thereof. The soft SMS water-repellent non-woven fabric comprises spunbond layers and a melt-blown layer, wherein the melt-blown layer is fixed between the adjacent spunbond layers and is made of a spunbond material; the spun-bonded material comprises the following substances in parts by weight: 84-92.2 parts of polypropylene, 0.3-2.5 parts of extinction white, 5-10 parts of elastomer and 2.5-3.5 parts of soft master batch; the softening master batch comprises a softening agent, and the softening agent comprises polyether modified organic silicon oil; the melt-blown material comprises the following substances in parts by weight: 100 parts of modified polypropylene, wherein the modified polypropylene is prepared by modifying polypropylene with a modifier. The soft SMS water repellent non-woven fabrics of this application can be used to three-dimensional enclosure of sanitary towel, panty-shape diapers, and it has the advantage of compliance, use comfort, waterproof gas permeability preferred.
Description
Technical Field
The application relates to the field of non-woven fabric materials, in particular to a soft SMS water-repellent non-woven fabric and a preparation method thereof.
Background
The non-woven fabric has the advantages of high strength, good filtering performance, no adhesive, no toxicity and the like, and is further widely applied to surgical gowns, protective clothing and disposable articles, and the non-woven fabric is frequently used for preparing three-dimensional enclosures of sanitary towels, sanitary pads, paper diapers and the like in the disposable articles, so that urine and menstrual blood are prevented from being exposed along the edges of the paper diapers and the sanitary towels, and the side leakage prevention effect is achieved.
In order to enable the three-dimensional enclosure to stably play a role in preventing side leakage, the non-woven fabric is required to have a waterproof effect, the water-repellent non-woven fabric generally comprises a film-coated non-woven fabric, a spunlace non-woven fabric and the like, the film-coated non-woven fabric is widely applied, and when the film-coated non-woven fabric is manufactured, the manufactured non-woven fabric is covered with a layer of polypropylene film, urine, menstrual blood and the like are blocked by the polypropylene film, so that the side leakage preventing effect of the three-dimensional enclosure is stably improved.
Aiming at the related technology, along with the improvement of the economic level, the requirements of users on the quality and the use comfort of disposable articles are gradually improved, the inventor thinks that the polypropylene film is coated outside the non-woven fabric, so that the hardness of the non-woven fabric is increased, and the non-woven fabric has the defect of poor softness, namely, the use comfort of the non-woven fabric is poor.
Disclosure of Invention
In order to improve the defect that the non-woven fabric has poor softness, namely the non-woven fabric is poor in comfort in use, the application provides a soft SMS water-repellent non-woven fabric and a preparation method thereof.
In a first aspect, the application provides a soft SMS water repellent non-woven fabric, which adopts the following technical scheme:
a soft SMS water repellent non-woven fabric comprises spunbond layers and meltblown layers, wherein the meltblown layers are fixed between adjacent spunbond layers and are made of spunbond materials, and the meltblown layers are made of meltblown materials; the spun-bonded material comprises the following substances in parts by weight: 84-92.2 parts of polypropylene, 0.3-2.5 parts of extinction white, 5-10 parts of elastomer and 2.5-3.5 parts of soft master batch; the softening master batch comprises a softening agent, and the softening agent comprises polyether modified organic silicone oil; the melt-blown material comprises the following substances in parts by weight: 100 parts of modified polypropylene, wherein the modified polypropylene is prepared by modifying polypropylene with a modifier.
By adopting the technical scheme, the non-woven fabric is prepared by compounding the spunbond layer and the melt-blown layer to form a multilayer composite structure of the spunbond layer, the melt-blown layer and the spunbond layer, a three-layer composite structure is usually adopted, fibers of the fiber web in the spunbond layer are of a continuous filament structure and have high strength and better mechanical strength, the fiber web in the melt-blown layer is of a superfine fiber structure and further has a higher specific surface area, so that a stable bonding effect can be performed between the spunbond layer, the melt-blown layer and the spunbond layer, meanwhile, the porosity of the fiber web in the melt-blown layer is smaller, certain blocking can be performed on menstrual blood, urine and the like, the waterproof effect of the non-woven fabric is improved, a thinner pp waterproof film can be loaded outside the non-woven fabric, the better waterproof effect can be achieved, and the softness of the non-woven fabric is effectively improved.
Because the soft master batch is added into the spun-bonded layer, the soft master batch adopts poly and polyether modified organic silicon oil as the softening agent, and the polypropylene is modified by the polyether modified organic silicon oil, on one hand, the polyether modified organic silicon oil can coat the polypropylene, on the other hand, the polyether modified organic silicon oil is loaded with an amino group and an ether group, and a layer of smooth coating film is formed outside the spun-bonded fiber in the spun-bonded layer in cooperation, so that the friction force between the spun-bonded fibers is reduced, the fibers can move with small force, the softness of the non-woven fabric is improved, the spun-bonded fibers are separated from the outside, and the water repellency of the non-woven fabric is improved, therefore, the non-woven fabric obtains better softness and water repellency.
Preferably, the soft master batch comprises the following substances in parts by weight: 20-30 parts of carrier, 2-4 parts of softening agent, 1-2 parts of auxiliary agent and 3-5 parts of dispersing agent, wherein the softening agent also comprises one or two of amino silicone and lauryl alcohol ether sodium sulfate.
By adopting the technical scheme, the amino silicone and the polyether modified organic silicon oil are matched with each other to be used as the softening agent, and the amino silicone has a softer main chain, so that the chain structure of the amino silicone can rotate freely around a silicon-oxygen bond, that is, the friction force between fibers in the spun-bonded fiber net in the spun-bonded layer is reduced, that is, the spun-bonded fiber net fibers can slide mutually under the action of smaller force, and the softness of the spun-bonded layer is further improved. Meanwhile, because the amino silicone is loaded on the fiber structure of the spun-bonded fiber web, in the process of forming the spun-bonded layer, the water and carbon dioxide in the air can be absorbed, the amino silicone is subjected to self-condensation, the crosslinking density in the spun-bonded fiber web is enhanced, the softness of the non-woven fabric is improved, and the water repellency of the non-woven fabric is also improved.
Secondly, the sodium laureth sulfate has a better surface modification effect on the polypropylene, wets the polypropylene, can enhance the surface activity of the polypropylene, improves the combination effect between the polypropylene and the softening agent, enhances the compatibility between the soft master batch and the polypropylene, and stably improves the softness of the non-woven fabric. Meanwhile, after the sodium lauryl ether sulfate and the polyether modified organic silicone oil are matched with each other, the surface modification can be performed on the polypropylene in a synergistic manner, so that a compact adsorption film is formed on the surface of the spun-bonded fiber, the bonding effect between the spun-bonded layer and the melt-blown layer is further enhanced, and the water repellency of the non-woven fabric is improved.
And finally, amino silicone, sodium lauryl ether sulfate and polyether modified organic silicone oil are matched with one another, so that on one hand, a freely rotating long-chain structure is introduced into the spun-bonded fibers, and a self-condensation structure is introduced to improve the crosslinking degree in the spun-bonded fibers, on the other hand, active groups are introduced into the spun-bonded fibers to form an adsorption film, the friction force between the spun-bonded fibers is synergistically reduced, the softness of the non-woven fabric is improved, meanwhile, the crosslinking density between spun-bonded fiber networks can be improved, and the water repellency effect of the non-woven fabric is enhanced.
Preferably, the softening agent further comprises a swelling body, the swelling body comprises a shell material and a core material, the shell material comprises gel liquid, the core material comprises lavender essential oil and nano zinc oxide, and the mass ratio of the lavender essential oil to the nano zinc oxide is 1-2.
By adopting the technical scheme, the gel liquid is used as the swelling body shell, and the gel liquid has a three-dimensional network structure, so that the crosslinking density in the spunbond layer can be effectively enhanced, the softness of the spunbond layer can be further improved, and the water repellency of the spunbond layer can be improved. The lavender essential oil and the nano zinc oxide are adopted as the core material, and after the lavender essential oil and the nano zinc oxide are mixed, a semi-flowing mixture is formed, so that the core material can be wrapped by gel liquid stably, and after the shell material is swelled and broken, the core material can flow outwards, bacteriostasis can be rapidly and stably carried out, the possibility of bacterial breeding caused by long-time contact of urine or menstrual blood with skin is reduced, and the use comfort of a user is improved.
In addition, after urine and menstrual blood contact with the water-repellent non-woven fabric, the gel liquid shell absorbs water and swells, and pores in the non-woven fabric can be filled in the swelling process, so that the water-repellent effect of the non-woven fabric is further improved, and the side leakage prevention effect of the three-dimensional enclosure is stably improved.
Preferably, the preparation of the swelling body comprises the following steps: respectively weighing 10-20 parts by weight of K-carrageenan, 12-20 parts by weight of N-isopropylacrylamide, 1-2 parts by weight of cross-linking agent, 3-5 parts by weight of potassium chloride and 5-8 parts by weight of water, stirring and mixing the K-carrageenan, the N-isopropylacrylamide and the cross-linking agent to prepare a mixed solution, adding the potassium chloride and the water into the mixed solution, stirring and mixing, and preserving heat for dissolution to prepare a gel solution; and (3) taking 10-15 parts of gel liquid and 2-3 parts of core material, stirring and mixing, and performing irradiation curing to obtain the swelling body.
By adopting the technical scheme, the gel solution prepared by crosslinking the K-type carrageenan, the N-isopropyl acrylamide and the potassium chloride has better flexibility and certain environmental sensitivity. After the non-woven fabrics and human skin are contacted for a long time, the swelling body absorbs sweat, chloride ions in the sweat and chloride ions in gel liquid are dissolved out, after free chloride ions in the non-woven fabrics reach a certain degree, the swelling body can be subjected to phase transition to separate out water, and the swelling body shrinks, namely, the dissolution of the core material is controlled, so that the non-woven fabrics have a relatively long-acting antibacterial effect, can block urine and menstrual blood for a long time, a better side leakage prevention effect is achieved, and the use comfort of a user is improved.
Preferably, the carrier comprises polypropylene, polyurethane and SBS elastomer, and the mass ratio of the polypropylene to the polyurethane to the SBS elastomer is 5-8.
Through adopting above-mentioned technical scheme, adopt polypropylene, polyurethane and SBS elastomer to mutually support, the three all has the compliance and the elasticity of preferred, stably improves the compliance of non-woven fabrics. The polypropylene is added into the carrier, so that the dispersion effect and compatibility of the soft master batch in the spun-bonded material are enhanced, and the spun-bonded material obtains more uniform softness. At the same time, spiral microfibers can be introduced into the spunbond web to further improve the softness of the spunbond layer.
And secondly, graft modification can be carried out between the polyurethane and SBS elastomer and the polyether modified silicone oil to form an interpenetrating network structure, so that the combination effect among the components of the soft master batch is further enhanced, the water absorption effect of the soft master batch can be reduced, and the water repellency of the non-woven fabric is improved.
Preferably, the modifier comprises one or more of silica aerogel, polyethylene glycol and activated carbon.
Through adopting above-mentioned technical scheme, at first, adopt silica aerogel to modify polypropylene for modified polypropylene's viscosity increases, introduces more pore structure at modified polypropylene simultaneously, and the aperture between the increase melt-blown fibre net effectively improves the ventilation effect on melt-blown layer. In addition, the specific surface area and the adsorption effect of the melt-blown fibers can be increased, so that the combination effect between the melt-blown layer and the spunbond layer is enhanced, the interception effect of the melt-blown layer on particles can be improved, and the non-woven fabric can obtain a better waterproof and breathable effect.
Secondly, the polyethylene glycol is adopted to modify the polypropylene, so that the viscosity of the modified polypropylene is reduced, the fluidity of the modified polypropylene is increased, the modified polypropylene is easier to stretch, the formed melt-blown fibers are thinner, the arrangement among the melt-blown fibers is finer, and the water repellency effect of the non-woven fabric is further improved.
In addition, the polypropylene is modified by adopting the activated carbon, so that the modified polypropylene has a better specific surface area, namely, the surface adsorption effect of the modified polypropylene is enhanced, the combination effect between the spunbond layer and the melt-blown layer is enhanced, meanwhile, the activated carbon can block fiber pores in the non-woven fabric, and the waterproof effect of the non-woven fabric is improved.
Finally, the silicon dioxide aerogel, the polyethylene glycol and the activated carbon are matched to modify the polypropylene, the combination effect between the modifier and the polypropylene can be effectively enhanced through the polyethylene glycol, and meanwhile, the viscosity and the fluidity of the modified polypropylene are improved, so that the melt-blown layer not only can obtain better fiber crosslinking density, but also can obtain better ventilation effect, and the use comfort of the non-woven fabric is synergistically improved.
Preferably, the modifier is a modifier pretreated by butyl methacrylate.
By adopting the technical scheme, the polypropylene can be stably crosslinked and grafted with the butyl methacrylate, so that ester groups are grafted on the polypropylene, the bonding effect between the spunbond layer and the melt-blown layer is improved, the oleophylic effect of the non-woven fabric is also improved, and the water repellency of the non-woven fabric is improved.
In a second aspect, the application provides a method for preparing a soft SMS water-repellent non-woven fabric, which adopts the following technical scheme:
a preparation method of soft SMS water-repellent non-woven fabric comprises the following preparation steps: s1, preparing a first spunbond layer: weighing a half mass of the spun-bonded material according to a formula, stirring and mixing, extruding and melting, filtering and removing impurities, spinning and spinning, processing by a cold air process, stretching and shaping, dividing filaments and forming a first fiber web; s2, preparing a melt-blown layer: weighing the melt-blown materials according to a formula, stirring and mixing, extruding and melting, filtering and removing impurities, spinning and spinning, carrying out hot air process treatment, and adsorbing onto a first fiber web to form a second fiber web; s3, a second spunbond layer: weighing the rest half of the spun-bonded material according to the formula, stirring and mixing, extruding and melting, filtering and removing impurities, spinning, cold air processing, stretching and shaping, dividing filaments, and adsorbing onto a second fiber net to form a third fiber net; s4, preparing non-woven fabric: and (5) carrying out hot-pressing treatment on the third fiber web to obtain the non-woven fabric.
By adopting the technical scheme, the melt-blown layer is directly loaded on the first fiber mesh, the second spunbond layer is loaded on the second fiber mesh, the melt-blown layer and the spunbond layer are stably bonded under the pressure of spinning, and meanwhile, hot pressing treatment is adopted, so that the bonding between the melt-blown layer and the spunbond layer is further improved, and the water repellency effect of the non-woven fabric is improved.
Preferably, the extrusion melting process in the steps S1 and S3 adopts stepped temperature treatment, the temperature treatment range is 180-235 ℃, and the extrusion melting process in the step S2 adopts stepped temperature treatment, and the temperature treatment range is 190-255 ℃.
Through adopting above-mentioned technical scheme, adopt the mode that the ladder ization temperature was handled for spunbond material and melt-blown material stably form even melt, and then at spinning in-process, the spunbond fibre and the melt-blown fibre that form are more even and the diameter is less, make the non-woven fabrics obtain comparatively even compliance.
Preferably, the temperature of the hot pressing treatment in the step S4 is 135-145 ℃, and the roller pressure is 50-70N.
Through adopting above-mentioned technical scheme, adopt suitable hot pressing temperature and roll pressure for can carry out comparatively stable bonding between spunbond layer and the melt-blown layer, make the non-woven fabrics obtain the thickness and the waterproof ventilation effect of preferred. When the temperature of the hot pressing treatment and the pressure of the roller are too high, the nip point can break the non-woven fabric, or the spun-bonded material is melted and attached to the roller, so that the surface of the non-woven fabric is rough, the softness is poor, and the use comfort is poor.
In summary, the present application has the following beneficial effects:
1. because this application adopts spunbond layer and melt-blown layer complex preparation non-woven fabrics, because the spunbond layer has elasticity and the compliance of preferred, the melt-blown layer has higher specific surface area and less hole, and then after compounding, obtain the non-woven fabrics that has waterproof nature and compliance preferred, and then at the thinner waterproof film of non-woven fabrics external load, can reach the water repellent effect of preferred, and add soft master batch in the spunbond layer, modify polypropylene through polyether modified silicone oil, make the last load of polypropylene have amino group and ether group, make the outer smooth coating film that forms of spunbond fiber, reduce the frictional force between the spunbond fiber, therefore the non-woven fabrics has obtained the effect of compliance preferred.
2. Preferably adopt in this application and add the swelling body in the spunbond layer, when non-woven fabrics and skin contact for a long time, easily produce the sweat, the non-woven fabrics can absorb sweat etc. the swelling body takes place the inflation simultaneously, hole in the shutoff non-woven fabrics, improve the water repellent effect of non-woven fabrics, the kernel material can outflow simultaneously, reduce the possibility that non-woven fabrics and skin contact department produced the bacterium, and when chloride ion content reached a definite value, the swelling body can take place the phase transition, wrap up the kernel material steadily once more, therefore, the non-woven fabrics has obtained long-term antibacterial and water repellent effect, and the use comfort of preferred.
3. According to the method, the melt-blown layer is directly sprayed on the first fiber web, the second spunbond layer is sprayed on the second fiber web, the bonding effect between the spunbond layer and the melt-blown layer is enhanced under the pressure impact of the spraying, and the bonding effect between the spunbond layer and the melt-blown layer is further enhanced through hot pressing treatment, so that the non-woven fabric obtains better softness and water repellent effect.
Detailed Description
The present application will be described in further detail with reference to examples.
In the embodiments of the present application, the selected drugs are as follows, but not limited to:
medicine preparation: CY-TM type polyether modified organic silicone oil of Guangzhou Changyun chemical industry Co Ltd, S2040 type polypropylene of Shanghai Seisaku petrochemical industry Co Ltd, 6202 transparent elastomer of Suzhou hong superplasticization Co Ltd, RPFW-61 type extinction white of Yancheng Ruze masterbatch Co Ltd, DM type accelerator of Guangzhou Lianli rubber raw material trade Co Ltd, RXY-5040 type dispersant of Wuhan Runxing Source science and technology Co Ltd, DHT type cross-linking agent of Qingdao Enze chemical industry Co Ltd, KH560 type cross-linking agent of Changzhou Xinze polymer material Co Ltd, and amino silicone is amino modified polysiloxane of Shandong national chemical Co Ltd.
Preparation examples
Example of preparation of the support
Preparation examples 1 to 3
Respectively weighing polypropylene, polyurethane and SBS elastomer, wherein the specific mass is shown in Table 1, stirring and mixing at 80 ℃, and melting and co-extruding to obtain the carrier 1-3.
TABLE 1 preparation examples 1-3 Carrier compositions
Preparation of housing Material
Preparation examples 4 to 6
Respectively weighing 5% by mass of K-carrageenan, 5% by mass of N-isopropylacrylamide, a crosslinking agent, potassium chloride and water, wherein the specific mass is shown in Table 2, adding the K-carrageenan, the N-isopropylacrylamide and the crosslinking agent into a sample bottle, stirring and mixing to obtain a mixed solution, adding the potassium chloride into the mixed solution, adding water with equal mass twice, continuously stirring and mixing, and keeping the temperature at 100 ℃ for dissolving for 2 hours to obtain a gel solution 1-3.
TABLE 2 PREPARATION EXAMPLES 4-6 GEL LIQUID COMPOSITION
Preparation of core Material
Preparation examples 7 to 9
And (3) respectively weighing the lavender essential oil and the nano zinc oxide, wherein the specific mass is shown in Table 3, and stirring and mixing to obtain the core material 1-3.
TABLE 3 PREPARATION EXAMPLES 7-9 CORE MATERIAL COMPOSITION
Examples of preparation of swelling Compounds
Preparation examples 10 to 12
Respectively weighing the gel liquid 1 and the core material 1, wherein the specific mass is shown in Table 4, stirring, mixing, and performing irradiation curing to obtain the swelling bodies 1-3.
TABLE 4 preparation examples 10-12 core Material compositions
Preparation examples 13 to 14
The difference from preparation example 11 is that: swelling bodies 4 to 5 were prepared using gel liquids 2 to 3 instead of gel liquid 1 in preparation example 11.
Preparation examples 15 to 16
The difference from preparation example 11 is that: instead of the core material 1 of preparation example 11, the core materials 2 to 3 were used to prepare swelling bodies 6 to 7.
Preparation of softening agent
Preparation examples 17 to 21
Respectively weighing polyether modified organic silicone oil, amino silicone, polysiloxane foam and a swelling body 1, wherein the specific mass is shown in Table 5, and stirring and mixing to obtain the softening agents 1-5.
TABLE 5 preparation examples 17-21 softener compositions
Preparation examples 22 to 27
The difference from preparation 21 is that: softeners 6 to 11 were prepared using the swelling bodies 2 to 7, respectively, instead of the swelling body 1 in preparation example 21.
Examples of preparation of softening Master batch
Preparation examples 28 to 30
Respectively weighing the carrier 1, the softening agent 1, the auxiliary agent and the dispersing agent, wherein the specific mass is shown in package 6, stirring and mixing, and carrying out melt co-extrusion to obtain the soft master batch 1-3.
TABLE 6 PREPARATION EXAMPLES 28-30 SOFT MASTER BATTERY COMPOSITION
Preparation examples 31 to 32
The difference from preparation 29 is that: soft master batches 4 to 5 were prepared using carriers 2 to 3, respectively, instead of carrier 1 in preparation example 29.
Preparation examples 33 to 42
The difference from preparation 29 is that: softening master batches 6 to 15 were prepared by using softening agents 2 to 11, respectively, instead of the softening agent 1 in preparation example 29.
Examples of preparation of modifier
Preparation examples 43 to 48
Respectively weighing the silicon dioxide aerogel, the polyethylene glycol and the activated carbon, wherein the specific mass is shown in Table 7, and stirring and mixing to obtain 1-6 of the modifier.
TABLE 7 preparation examples 43 to 48 modifier compositions
Preparation example 49
Taking 2kg of modifier 6, 1kg of silane coupling agent and 1kg of butyl methacrylate, stirring and mixing, and carrying out ultrasonic treatment for 5min to obtain the pretreated modifier 1.
Preparation examples 50 to 55
1-6 kg of modifier and 3kg of polypropylene are respectively adopted, stirred, mixed, melted and extruded to prepare 1-6 of modified polypropylene.
Preparation example 56
1kg of the pretreated modifier and 3kg of polypropylene are adopted, stirred and mixed, subjected to ultrasonic treatment for 5min and ultraviolet irradiation for 20min, and melted and extruded to prepare the modified polypropylene 7.
Examples
Example 1
On the one hand, this application provides a non-woven fabrics is refused to soft SMS, including two-layer spunbond layer and one deck melt-blown layer, the melt-blown layer is fixed in between two-layer spunbond layer. The spun-bonded layer is made of a spun-bonded material, the melt-blown layer is made of a melt-blown material, and the spun-bonded material comprises the following substances: polypropylene, delustering white, elastomer and soft master batch 1, and the specific mass is shown in table 8. The meltblown material comprised 100kg of modified polypropylene 1.
On the other hand, the application provides a preparation method of the soft SMS water-repellent non-woven fabric, which comprises the following steps:
preparation of the first spunbond layer: half the mass of the spunbond material was sucked into a compounder and conveyed to a screw extruder and extrusion melted at 235 ℃.
Filtering at 235 deg.c to eliminate impurity and to obtain filter precision of 300 mesh.
Spinning at 235 deg.c with 8000 spinneret holes and 2500 m spinning die head monomer sucking flow 3 A/h, cold air treatment, wherein the temperature of the cold air is 17 DEG CThe flow of partial process cold air on the side blowing is 5800m 3 H, the flow of process cold air at the lower part of the side blowing is 11800m 3 /h。
The melt is formed into nascent fiber trickle through a spinneret plate base, is cooled, stretched and qualified through process cold air, is divided into filaments through a diffusion channel, and is further uniformly adsorbed on a mesh forming curtain conveying belt to form a first fiber web.
Preparing a melt-blown layer: the melt-blown material is sucked into a dosing machine and conveyed to a screw extruder to be extruded and melted at 255 ℃.
Filtering at 255 ℃ to remove impurities, wherein the filtering precision is 300 meshes.
Spinning at 255 deg.C, wherein the number of spinneret holes of the spinneret plate is 8000, hot air is processed at 255 deg.C, and the flow rate of hot air is 200000m 3 /h。
And (3) enabling the melt to pass through a spinneret plate base to form a nascent fiber trickle, maintaining the melt through process hot air, and further uniformly adsorbing the melt on the first fiber web to form a second fiber web.
Preparation of a second spunbond layer: the preparation method is the same as that of the first spunbond layer, and details are not repeated here, so that a third fiber web is prepared.
Preparing non-woven fabrics: and continuously conveying the third fiber net to a hot rolling mill by using a net forming curtain with the air permeability of 9500cm & lt 3 & gt/m & lt 2 & gt d & atm, and controlling the temperature of the hot rolling mill to be 140 ℃ and the pressure to be 55N to obtain the soft non-woven fabric 1-3.
TABLE 8 examples 1-3 spunbond Material compositions
Examples 4 to 9
The difference from example 2 is that: the modified polypropylene 2 to 7 was used in place of the modified polypropylene 1 in example 2 to obtain flexible nonwoven fabrics 4 to 9.
Examples 10 to 23
The difference from example 2 is that: soft nonwoven fabrics 10 to 23 were produced using the soft master batches 2 to 15 in place of the modified polypropylene 1 in example 2.
Example 24
The difference from example 2 is that:
in the step of preparing the first spunbond layer, stepped temperature treatment is carried out in the pressurizing and melting process, wherein a first temperature control area is 180 ℃, a second temperature control area is 210 ℃, a third temperature control area is 230 ℃, a fourth temperature control area is 235 ℃, a sixth temperature control area is 235 ℃, and a seventh temperature control area is 235 ℃;
in the step of preparing the meltblown layer, a stepped temperature treatment is performed during the pressure melting process, wherein the first temperature control zone is 190 ℃, the second temperature control zone is 215 ℃, the third temperature control zone is 235 ℃, the fourth temperature control zone is 255 ℃, the sixth temperature control zone is 255 ℃, and the seventh temperature control zone is 255 ℃, so that the soft nonwoven fabric 24 is prepared.
Example 25
The difference from example 2 is that: in the step of preparing the non-woven fabric, the pressure of a hot press is 50N, the temperature is 135 ℃, the air permeability of the net forming curtain is 9000 cm3/m 2. D. Atm, and the soft non-woven fabric 25 is prepared.
Example 26
The difference from example 2 is that: in the step of preparing the non-woven fabric, the pressure of a hot press is 70N, the temperature is 145 ℃, the air permeability of a net curtain is 11000cm < 3 >/m < 2 >. D.atm, and the soft non-woven fabric 26 is prepared.
Example 27
The difference from example 2 is that: in the step of preparing the first spunbond layer, a spinneret plate with 8000 spinneret holes is adopted, and in the step of preparing the meltblown layer, a spinneret plate with 5500 spinneret holes is adopted to prepare the soft non-woven fabric 27.
Example 28
The difference from example 2 is that: in the step of preparing the first spunbond layer, a spinneret plate with the number of spinneret holes of 12000 is adopted, and in the step of preparing the meltblown layer, a spinneret plate with the number of spinneret holes of 6000 is adopted, so that the soft non-woven fabric 28 is prepared.
Example 29
The difference from example 2 is that: in the step of preparing the first spunbond layerAnd the monomer suction flow rate of the spinning die head adopted in the spinning and spinning process is 2000 m 3 The temperature of the process cold air is 15 ℃, and the flow of the process cold air on the side blowing is 5000m 3 H, the flow of process cold air at the lower part of the side blowing is 10000m 3 And h, preparing the soft non-woven fabric 29.
Example 30
The difference from example 2 is that: in the step of preparing the first spunbond layer, the monomer suction flow rate of a spinning die head adopted in the spinning and spinning process is 4000m 3 The temperature of the process cold air is 20 ℃, and the flow of the partial process cold air on the side blowing is 7000m 3 The flow rate of process cold air at the lower part of the side blowing is 14000m 3 And h, preparing the soft non-woven fabric 30.
Examples 31 to 32
The difference from example 2 is that: in the step of preparing the melt-blown layer, the process hot air flow is 18000 m 3 /h、24000m 3 And h, preparing the soft non-woven fabric 31-32.
Example 33
The difference from example 2 is that: the filtration precision was 200 mesh, and a soft nonwoven fabric 33 was produced.
Comparative example
Comparative example 1
The difference from example 2 is that: only the spunbond layer was prepared to produce a soft nonwoven 34.
Comparative example 2
The difference from example 2 is that: the spunbond layer was prepared without adding the soft masterbatch to make a soft nonwoven 35.
Comparative example 3
The difference from example 2 is that: the melt-blown layer was prepared using only polypropylene to produce a soft nonwoven 36.
Performance test
(1) And (3) softness testing: the softness of the soft non-woven fabric is tested by adopting a GL005 type fabric softness tester of Wuhan national instruments Limited.
(2) And (3) detecting the air permeability: according to GB/T5453-1997 determination of fabric air permeability, an automatic air permeability measuring instrument is adopted to detect the air permeability of the soft non-woven fabric;
(3) And (3) detecting the water repellency: the water repellency of the soft non-woven fabric is detected according to the national standard GB/T4744-1997 hydrostatic test for measuring the water impermeability of the textile fabric.
TABLE 9 Performance test of examples 1-33 and comparative examples 1-3
In combination with the comparison of the performance tests in table 9, it can be found that:
(1) Combining the ratios of examples 1-3 and comparative examples 1-3, it can be found that: the softness, air permeability and water repellency of the soft nonwoven fabrics prepared in examples 1-3 are improved, which shows that the soft nonwoven fabrics with three-layer structures are prepared by adopting a spunbond layer, a melt-blown layer and a spunbond layer, the softness of the spunbond layer and the water repellency of the melt-blown layer are combined, and the soft master batch is added into the spunbond layer, so that the softness of the soft nonwoven fabrics is stably improved, and the softness, air permeability and water repellency of the soft nonwoven fabrics prepared in example 2 are better as shown in table 9, which shows that the components in the spunbond materials are more suitably mixed.
(2) A comparison of the combinations of examples 2, 4 to 5, 6 to 7, 8 and 9 shows that: the softness, air permeability and water repellency of the soft nonwoven fabrics prepared in examples 4 to 9 are all improved to some extent, which indicates that the polypropylene is modified by using the silica aerogel, the polyethylene glycol and the activated carbon, so that not only is the combination effect between the modifier and the polypropylene improved, but also the crosslinking effect between the melt-blown fibers can be enhanced, and the driving air permeability and softness of the soft nonwoven fabrics are improved. As can be seen from table 9, the soft nonwoven fabrics prepared in examples 8 and 9 have better softness, air permeability and water repellency, which indicates that the ratio of each component in the modifier is more suitable in example 8, and the water repellency of the soft nonwoven fabric can be improved by pretreating the modifier in example 9.
(3) A comparison of the results obtained in example 2, examples 10 to 11 and examples 12 to 13 shows that: the softness, air permeability and water repellency of the soft nonwoven fabrics prepared in examples 10 to 13 are improved, which shows that in the present application, the polyether modified silicone oil is used in combination with the polypropylene, polyurethane and SBS elastomer to prepare the soft masterbatch, the compatibility among the components of the carrier is better, the viscosity of the carrier is reduced, and the carrier is loaded with free long chain groups, so that the soft masterbatch obtains better viscosity and softness, and further, the friction force between the spun-bonded fibers formed by spinning is lower, and the softness of the soft nonwoven fabrics is stably improved. It can be seen from table 9 that the ratio of each component in the soft masterbatch is suitable in example 10, and the ratio of each component in the vehicle is suitable in example 12.
(4) Comparison with example 2, examples 14-15 and example 16 shows that: the softness, air permeability and water repellency of the soft nonwoven fabrics prepared in examples 14-16 are all improved, which shows that the application adopts the mutual cooperation of amino silicone, sodium lauryl ether sulfate and polyether modified silicone oil to introduce a free long chain structure, a self-condensation crosslinking structure and an adsorption film structure into the spunbond fibers, so that the friction force between the spunbond fibers is stably reduced, and the softness of the nonwoven fabrics is improved. As can be seen from table 9, the soft nonwoven fabric produced in example 16 is excellent in softness, air permeability and water repellency, and the respective component proportions in the softener are appropriate in this case.
(5) A comparison of the combinations of examples 2, 17 to 19, 20 to 21 and 22 to 23 shows that: the softness, air permeability and water repellency of the soft non-woven fabrics prepared in examples 17-23 are improved, which shows that the gel liquid is adopted to coat the nano zinc oxide and the lavender essential oil, sweat at the contact position of the non-woven fabrics and the skin is absorbed, the core material is released, the bacterial growth is inhibited, the use comfort is improved, a cross-linked structure is formed, and the softness and the water repellency of the non-woven fabrics are improved. As can be seen from table 9, the ratio of each component in the swelling agent in example 18 is suitable, the ratio of each component in the gel liquid in example 20 is suitable, and the ratio of each component in the core material in example 22 is suitable.
(6) A comparison of example 2 with example 24 shows that: the softness, air permeability and water repellency of the soft nonwoven fabric prepared in example 24 are all improved, which indicates that the application adopts the stepped temperature treatment, so that the spunbond material and the meltblown material form a molten mass with relatively uniform viscosity, which is beneficial to stretch forming of the spunbond material and the meltblown material, and stably improves the softness and water repellency of the soft nonwoven fabric.
(7) A comparison of example 2 with examples 25 to 26 shows that: the softness, air permeability, and water repellency of the soft nonwoven fabrics produced in examples 25-26 are all reduced, which indicates that the present application, at a relatively suitable temperature, roll pressure, and web formation air permeability, enables the bonding effect of the spunbond layer and the meltblown layer to be better, enables the thickness and compactness of the soft nonwoven fabric to be improved, and further improves the softness and water repellency of the soft nonwoven fabric.
(8) Comparison with example 2, examples 27-28, examples 29-30, examples 31-32 and example 33 can be found: the softness, air permeability and water repellency of the soft non-woven fabrics prepared in examples 27 to 33 are reduced, which shows that the spinneret plate, the cold air process, the hot air process and the filtering precision suitable for the application enable the spun-bonded fibers and the melt-blown fibers to be uniformly spun, the forming is stable, the doubling is not easy, the spun-bonded layer and the melt-blown layer with stable cross-linking are formed, and the non-woven fabrics obtain uniform softness and water repellency.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (4)
1. The soft SMS water-repellent non-woven fabric is characterized by comprising spunbond layers and melt-blown layers, wherein the melt-blown layers are fixed between the adjacent spunbond layers and are made of spunbond materials, and the melt-blown layers are made of melt-blown materials;
the spun-bonded material comprises the following substances in parts by weight: 84-92.2 parts of polypropylene, 0.3-2.5 parts of extinction white, 5-10 parts of elastomer and 2.5-3.5 parts of soft master batch;
the soft master batch comprises the following substances in parts by weight: 20-30 parts of a carrier, 2-4 parts of a softening agent, 1-2 parts of an auxiliary agent and 3-5 parts of a dispersing agent, wherein the softening agent also comprises one or two of amino silicone and lauryl alcohol ether sodium sulfate; the softening agent comprises polyether modified organic silicone oil;
the melt-blown material comprises the following substances in parts by weight: 100 parts of modified polypropylene, wherein the modified polypropylene is prepared by modifying polypropylene with a modifier;
the softening agent also comprises a swelling body, wherein the swelling body comprises a shell material and a core material, the shell material comprises gel liquid, the core material comprises lavender essential oil and nano zinc oxide, and the mass ratio of the lavender essential oil to the nano zinc oxide is (1-2);
the preparation of the swelling body comprises the following steps: respectively weighing 10-20 parts by weight of K-carrageenan, 12-20 parts by weight of N-isopropylacrylamide, 1-2 parts by weight of cross-linking agent, 3-5 parts by weight of potassium chloride, 5-8 parts by weight of water, stirring and mixing the K-carrageenan, the N-isopropylacrylamide and the cross-linking agent to prepare a mixed solution, adding the potassium chloride and the water into the mixed solution, stirring and mixing, and keeping the temperature to dissolve to prepare a gel solution; taking 10-15 parts of gel liquid and 2-3 parts of core material, stirring and mixing, and performing irradiation curing to obtain a swelling body;
the carrier comprises polypropylene, polyurethane and an SBS elastomer, wherein the mass ratio of the polypropylene to the polyurethane to the SBS elastomer is 5-8;
the modifier comprises one or more of silicon dioxide aerogel, polyethylene glycol and activated carbon;
the modifier is pretreated by butyl methacrylate.
2. The preparation method of the soft SMS water-repellent non-woven fabric according to claim 1, characterized in that: the preparation method comprises the following preparation steps:
s1, preparing a first spunbond layer: weighing a half mass of the spun-bonded material according to a formula, stirring and mixing, extruding and melting, filtering and removing impurities, spinning and spinning, processing by a cold air process, stretching and shaping, dividing filaments and forming a first fiber web;
s2, preparing a melt-blown layer: weighing the melt-blown material according to a formula, stirring and mixing, extruding and melting, filtering and removing impurities, spinning, carrying out hot air process treatment, and adsorbing onto a first fiber web to form a second fiber web;
s3, preparing a second spunbond layer: weighing the rest half of the spun-bonded material according to the formula, stirring and mixing, extruding and melting, filtering and removing impurities, spinning and spraying, processing by a cold air process, stretching and shaping, dividing filaments, and adsorbing onto a second fiber net to form a third fiber net;
s4, preparing non-woven fabric: and (5) carrying out hot-pressing treatment on the third fiber web to obtain the non-woven fabric.
3. The preparation method of the soft SMS water-repellent non-woven fabric according to claim 2, characterized in that: the extrusion melting process in the steps S1 and S3 adopts stepped temperature treatment, the temperature treatment range is 180-235 ℃, the extrusion melting process in the step S2 adopts stepped temperature treatment, and the temperature treatment range is 190-255 ℃.
4. The preparation method of the soft SMS water-repellent non-woven fabric according to claim 2, characterized in that: the temperature of the hot pressing treatment in the step S4 is 135-145 ℃, and the roller pressure is 50-70N.
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