CN114561749A - Non-woven material capable of releasing negative ions and preparation method thereof - Google Patents

Non-woven material capable of releasing negative ions and preparation method thereof Download PDF

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Publication number
CN114561749A
CN114561749A CN202111674427.6A CN202111674427A CN114561749A CN 114561749 A CN114561749 A CN 114561749A CN 202111674427 A CN202111674427 A CN 202111674427A CN 114561749 A CN114561749 A CN 114561749A
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fiber layer
fiber
melting
fibers
low
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CN114561749B (en
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赵程波
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HANGZHOU NBOND NONWOVENS CO LTD
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HANGZHOU NBOND NONWOVENS CO LTD
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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
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
    • D04H5/03—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling by fluid jet
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
    • D04H3/147—Composite yarns or filaments
    • 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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/13—Physical properties anti-allergenic or anti-bacterial
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

The invention relates to the field of non-woven materials, and discloses a non-woven material capable of releasing negative ions and a preparation method thereof, wherein the non-woven material comprises a first fiber layer, a second fiber layer and a third fiber layer which are sequentially connected in a superposed manner; the first fiber layer contains super absorbent fibers and antibacterial fibers; the second fiber layer comprises low-melting-point fibers and negative ion powder particles; the third fibrous layer is comprised of hydrophobic fibers. According to the invention, the negative ion powder particles are fixed in the fiber net, so that the negative ion powder particles are high in addition amount and are not easy to fall off; the super-absorbent fiber is arranged in the first fiber layer connected with the negative ion powder particles to fully absorb moisture in the surrounding environment, so that the generation amount of negative ions can be effectively increased, and the air purification effect is improved; antibacterial fibers are added into the first fiber layer, so that the material is prevented from mildewing under the condition that the first fiber layer has high humidity; the production device of the non-woven material capable of releasing the negative ions has the advantages of reasonable design, simple structure, convenience in operation, high production efficiency and suitability for practical popularization.

Description

Non-woven material capable of releasing negative ions and preparation method thereof
Technical Field
The invention relates to the field of non-woven materials, in particular to a non-woven material capable of releasing negative ions and a preparation method thereof.
Background
With the increasing improvement of the living standard of people, people pay more and more urgent attention to life, health and safety. In recent years, the number of patients with various cancers is increasing, people also put forward new requirements on the safety of various soft decorative materials, and the soft decorative materials not only have various special functions, but also have the characteristics of health and environmental protection.
Currently, a large amount of polymer materials are included in some interior materials for indoor use and vehicle use. In daily life, small-molecule toxic gases (such as benzene, formaldehyde, acetone and the like) in the interior decoration materials are gradually released, and the interior decoration materials are unconsciously harmful to physical and psychological health of people. In the closed environments such as indoor and transportation means, the peculiar smell accumulated by cigarettes, dirty fermentation and the like seriously affects the body health. Therefore, the development of healthy and safe interior decoration materials has been a hot spot of industrial technical research.
Patent CN201920569651.0 discloses a novel compound surface fabric, concretely relates to interior decoration field, this novel compound surface fabric top-down includes fabric layer, active carbon + hot melt adhesive layer and non-woven fabrics layer in proper order, and it is high density cloth to weave the cloth layer, and active carbon + hot melt adhesive layer evenly sprays between fabric layer and non-woven fabrics layer through the dusting system, and fabric layer, non-woven fabrics layer pass through active carbon + hot melt adhesive hot pressing composite connection. The invention uses the active carbon adsorption material to adsorb harmful gas and purify indoor air. The scheme has the defects that the active carbon adsorption material is easy to desorb at high temperature, and the adsorption effect is greatly reduced when the adsorption material is saturated.
The patent CN201810406028.3 discloses a method for manufacturing a nano negative ion vehicle interior fabric with an improved structure, which comprises the steps of taking 16 parts of nano tourmaline powder, 5 parts of a dispersant, 4 parts of a coupling agent, 3 parts of an antioxidant and 70 parts of water as finishing liquid, adopting a rolling-drying-baking process, pouring the finishing liquid into a padding device, impregnating knitted fabrics, carrying out two times of soaking and two times of rolling, pre-drying and baking the knitted fabrics, and finally shaping the treated knitted fabrics and attaching the knitted fabrics to non-woven fabrics to obtain the nano negative ion vehicle interior fabric. The finishing liquid is coated on the surface of the knitted fabric, so that the knitted fabric generates negative ions, and the problem of automotive interior pollution is effectively solved.
Patent CN201710674055.4 discloses a method for preparing high-efficiency antibacterial non-woven fabric by adopting a co-blending weaving method and using negative ions 4.5d 65mm polyester fiber is hot-melt drawn at a high temperature of 280-300 ℃ and made into 35-50 g/m by a common non-woven fabric process2High-efficient antibiotic non-woven fabrics, this non-woven fabrics is water-fast to wash and can release anion when using. The scheme adopts a granulation method to prepare the anion fiber, and has the defects that the addition amount of inorganic mineral substances is limited due to the influence of fiber spinnability, so that the air purification effect of the material is influenced.
As described above, the interior materials currently used in the interior and transportation are mainly woven fabrics, nonwoven fabrics, composite materials, artificial leathers, and the like. The technical methods for eliminating indoor harmful gas and peculiar smell mainly comprise the following steps:
1. the interior decoration material is provided with an adsorption layer, and generally, the interior decoration material adopts adsorption materials such as active carbon, montmorillonite and the like to adsorb indoor peculiar smell and purify the air environment. However, the material of the adsorption layer is easy to desorb under the condition of high temperature, the adsorption effect is gradually reduced along with the time, and the adsorption material is saturated;
2. active component substances generating negative ions are directly connected with the surface of the decorative fabric in the modes of padding, coating and the like, and the negative ions in the air adsorb peculiar smell and harmful gases. But the bonding force between the active substance and the fabric is low, and the active substance is easy to fall off under long-time friction;
3. directly adding active particles generating negative ions into a fiber solution, spinning into negative ion fibers, and then preparing the negative ion fibers into the decorative fabric. In the mode, the active particles can influence the spinnability of the fiber, the incompatibility of inorganic mineral components and polymer macromolecules exists, the active particles are easy to agglomerate, the adding amount in the spinning is limited, and the physical performance of the fiber can be reduced.
In order to solve the above problems in the prior art, a new nonwoven material with high content of adsorptive material, stable combination and remarkable adsorption and purification functions needs to be developed.
Disclosure of Invention
The invention provides a non-woven material capable of releasing negative ions and a preparation method thereof, aiming at improving the performances of decontamination, deodorization and formaldehyde removal of the existing interior decoration material and solving the technical problems of low content of adsorptive substances, unstable combination and poor adsorption and purification effects of the existing product.
The specific technical scheme of the invention is as follows:
in a first aspect, the present invention provides a nonwoven material capable of releasing negative ions, comprising a first fiber layer, a second fiber layer and a third fiber layer which are sequentially connected in an overlapped manner; the first fiber layer contains super absorbent fibers and antibacterial fibers; the second fiber layer comprises low-melting-point fibers and negative ion powder particles attached to the low-melting-point fibers; the third fibrous layer is comprised of hydrophobic fibers.
The non-woven material capable of releasing negative ions is characterized in that:
(1) research of the invention finds that increasing the moisture content around the anion powder particles is beneficial to improving the anion release amount and the effect of deodorizing and removing formaldehyde; the relationship between the release amount of negative ions and the surrounding water content shows a change rule of increasing gradually and then stabilizing. The reason is that the negative ion powder particles need the participation of moisture in the process of generating negative ions, and the negative ion powder particles ionize H in the air through a strong electric field2O is changed into OH-, and then is combined with other air water or air particles to form active negative ion groups with adsorption and decomposition effects. Therefore, the super-absorbent fiber is added in the first fiber layer which is directly contacted with the external environment, so that the super-absorbent fiber can absorb the water in the surrounding environment, the water content of the non-woven material capable of releasing negative ions is kept in a specific range (preferably 10-40%), the first fiber layer is equivalent to a weak water storage tank, the ionization reaction of negative ion powder particles in the second fiber layer can be continuously enhanced, the generation amount of negative ions is greatly enhanced, and the air purification effect is enhanced.
(2) Since the first fiber layer has a high water content, it is likely to be mildewed. Therefore, the invention adds antibacterial fiber (such as antibacterial polyester fiber) in the first fiber layer to enhance the durability of the material and prevent the mildew problem caused by high humidity in the material.
(3) The second fiber layer is positioned in the middle layer, wherein the negative ion powder particles are fixed on the low-melting-point fiber which is re-solidified after melting, so that the firmness of the powder particles is improved. Compare traditional flooding arrangement technology, this scheme can not produce the problem that the anion powder grain breaks away from, can not produce dust pollution, and simultaneously, the anion powder grain is located in the middle of the material, not with human direct contact, the security is high.
(4) The third fiber layer is used for adhering the interior decoration material (the non-woven material capable of releasing negative ions) to the wall surface or the automobile roof surface, and the hydrophobic fiber is adopted, so that the adhesive strength is high, and the moisture-proof and mildew-proof effects are achieved. The third fiber layer adopts hot-melt synthetic fibers, and can also play a role in thermal bonding, so that the forming processing is facilitated.
Preferably, the water absorption rate of the super absorbent fiber is 50 to 100 times.
Preferably, the first fiber layer accounts for 10-40% of the total mass of the material; the super-absorbent fibers account for 10-50% of the mass of the first fiber layer; the second fiber layer accounts for 40-60% of the total mass of the material; the negative ion powder particles account for 10-20% of the total mass of the material; the third fiber layer accounts for 10-30% of the total mass of the material.
The research of the invention group finds that the water absorption humidity has an upper limit on the synergy of the anion generation amount, the synergy is very little after reaching a certain humidity, the surface mildew probability is increased, and the hand feeling is poor. Therefore, it is required to control the mixing ratio of the antibacterial fiber and the super absorbent fiber.
Preferably, the antibacterial fibers in the first fiber layer are synthetic antibacterial fibers;
preferably, the low-melting-point fibers in the second fiber layer are polypropylene/polyester (PP/PET) sheath-core bicomponent fibers.
Compared with common PE/PET or PE/PP low-melting-point fibers, the polypropylene/polyester (PP/PET) low-melting-point fibers are adopted, and the PP has higher specific strength and melting temperature, so that the subsequent drying temperature can be properly increased without being secondarily melted, and the production efficiency is improved. The moisture regain of the PP fiber is 0, so that the PP fiber has excellent waterproof performance, and can prevent moisture in the first fiber layer from being conducted into the third fiber layer to cause the risk of material mildew.
Further preferably, the ratio of the sheath to the core in the sheath-core fiber is 30/70-70/30.
The skin-core structure proportion has the best proportion, the skin layer is used as a carrier for bonding the negative ion powder particles, the quality requirement of the skin layer is matched with the quality of the negative ion powder particles, the core layer terylene is too little due to high degree, the size stability is greatly changed after the product is baked and melted, the structural strength and the toughness can be reduced, the fiber can not be adhered with the powder particles due to less fibers, and the desorption phenomenon is increased. Therefore, the team of the present invention has conducted a great deal of research to determine the optimum range of the skin-core ratio.
Preferably, the polypropylene/polyester sheath-core bicomponent fiber is a filament.
Preferably, the particle size range of the negative ion powder particles is 800-2000 meshes.
Because the particle size of the powder particles is too small, the dust generated in the previous processing is seriously scattered, the processing is not facilitated, the uneven adhesion on the surface of the fiber is caused due to the too large particle size, and the uniformity of the negative ions generated in the product is reduced, so the particle size range of the negative ion powder particles needs to be reasonably selected. The group of the invention determines the optimal range of the particle size of the negative ion powder on the basis of a large number of experimental researches.
Preferably, the third fiber layer is a polypropylene (PP) spun-bonded hot-rolled nonwoven fabric.
The PP material has excellent waterproof and hydrophobic properties, the overall strength of the fabric is improved by a spun-bonded hot rolling mode, and meanwhile, the PP material is bonded in the shade of the back layer and can be effectively prevented from being wetted, so that the mildew risk is reduced. PP is used as hot melt fiber and can be used as gum to bond the ceiling and the bottom plate in the processing of some automotive interiors.
Preferably, the mass per unit area of the non-woven material capable of releasing negative ions is 60-200 g/m2。
In a second aspect, the present invention provides a method for preparing a nonwoven material capable of releasing negative ions, comprising the steps of:
(1) and performing electret treatment on the low-melting-point fiber web, and then performing adsorption treatment on the negative ion powder particles to obtain the low-melting-point fiber web adsorbed with the negative ion powder particles.
(2) And heating the low-melting-point fiber web adsorbed with the negative ion powder particles to melt the low-melting-point fibers so as to fix the negative ion powder particles, and preparing a second fiber layer.
(3) Mixing the super absorbent fibers and the antibacterial fibers, and forming a net by a dry method to prepare a first fiber layer.
(4) And sequentially superposing the first fiber layer, the second fiber layer and the third fiber layer, performing front-back spunlace to connect and reinforce the first fiber layer, the second fiber layer and the third fiber layer, and removing excessive moisture in the material to obtain the wet material.
(5) And drying the wet material to prepare the non-woven material capable of releasing the negative ions.
Preferably, in the step (1), the low-melting-point fiber web is a filament fiber web, and before electret treatment, the low-melting-point fiber web is formed into a web by directly laying the low-melting-point fiber web after spinning without any rolling and reinforcement.
The limitation is to increase the porosity among the filament fibers, so that the anion powder particles are more uniformly and stereoscopically adsorbed in the filament fiber web entering the particle applying unit, and the anion powder particles are prevented from being adsorbed on two surfaces of the fiber web, so that a plurality of particles can not be effectively bonded and desorbed during the subsequent thermal bonding reinforcement.
Preferably, in the step (1), the electret voltage of the electret treatment is 25-50 kV, and the electret distance is 4-8 cm.
Because the low-melting-point fiber is not subjected to electret modification treatment, the charge carried by the low-melting-point fiber web during the electret treatment has the characteristic of short duration, and the surface potential is gradually reduced along with the time, so that proper voltage needs to be controlled, and the low-melting-point fiber web still has proper surface potential in subsequent processes, so that a certain amount of negative ion powder particles can be adsorbed. But the voltage cannot be too high, the surface potential of the low-melting-point fiber net is easily high due to the too high voltage, the mass of the adsorbed negative ion powder particles exceeds the designed value, and meanwhile, the risk that the fibers are broken down by the potential and fire occurs is also brought.
Preferably, in the step (1), in the adsorption process, the flow rate of the powder is 5-10 g/s, and the temperature is 80-120 ℃.
The proper flow rate is used for controlling the number of powder particles existing in the unit time in the powder applying unit and is a key parameter for controlling the adsorption quantity of the fiber surface, and the powder applying unit is internally provided with a certain temperature so as to ensure that the powder particles are fully dried to achieve the floating effect, and meanwhile, the dried powder particles have certain charges.
Preferably, in the step (1), the low-melting-point fiber web adsorbed with the anion powder particles is subjected to roll pressing to control the thickness of the fiber web.
Preferably, in the step (2), the heating treatment adopts far infrared drying, and the temperature is 150-170 ℃.
The melting point of PP is 165 ℃, the melting temperature must be well matched according to the linear speed and the sheath-core ratio, otherwise, the fiber is excessively melted or insufficiently melted, and the reinforcing effect of powder particles is greatly influenced.
Preferably, in the step (5), the drying is carried out by hot air through drying, and the temperature is 140-160 ℃.
The optimal moisture drying temperature is matched according to the linear speed in the material drying process, so that the moisture content in the first fiber layer is controlled to be 10-40%, and the initial negative ion release effect of the material is influenced when the moisture content is lower than the moisture content.
The research of the team of the invention finds that when the water content of the material is too high, the release concentration of negative ions is not greatly improved, and the risk of fiber mildew is increased. Therefore, the drying temperature is controlled according to the production line speed, the drying efficiency of the production line is improved, the yield is improved, and the material deformation caused by secondary drying and melting of a large amount of PP fibers in the material due to overhigh temperature is avoided.
In a third aspect, the invention provides a device for producing a non-woven material capable of releasing negative ions, which comprises a powder particle applying unit, a superposition reinforcing unit and a drying unit which are connected in sequence according to the advancing direction of a low-melting-point fiber web.
Preferably, the powder particle applying unit comprises an electret area, an adsorption area and a reinforcement area which are mutually isolated and sequentially connected in the advancing direction of the low-melting-point fiber web; a plurality of transmission rollers for conveying the low-melting-point fiber web are arranged between the zones;
preferably, the adsorption area comprises a powder particle storage container, a feed hopper, a powder homogenizing roller, a powder stripping roller, a vibrating screen and a material returning hopper; a feed hopper heater is arranged on the feed hopper, a powder homogenizing roller and a powder stripping roller which are matched with each other are sequentially arranged below the feed hopper, a vibrating screen is arranged below the powder stripping roller, and the vibrating screen is positioned right above the low-melting-point fiber net; the return hopper is positioned right below the low-melting-point fiber web; the powder storage container and the return hopper each feed the feed hopper via a line and a suction pump.
Preferably, a high-voltage electrostatic generator and an electret needle plate which are matched with each other are arranged in the electret area; the electret fallers are respectively arranged on the upper side and the lower side of the low-melting-point fiber web and face the low-melting-point fiber web.
Preferably, a plurality of far infrared heating pipes distributed on the upper side and the lower side of the low-melting-point fiber net are arranged in the reinforcing area.
Preferably, the superposition and reinforcement unit comprises a composite guide roller, a flat screen hydro-entangling device and a circular drum hydro-entangling device which are sequentially connected.
The flat-net hydro-entangled device comprises an endless circularly rotating net supporting curtain and a plurality of guide rollers for conveying the net supporting curtain; the composite guide roller is arranged in front of the flat screen spunlace device and above the screen supporting curtain; and an unwinding frame is arranged in front of the flat screen spunlace device and below the screen supporting curtain.
Preferably, a plurality of water stabs facing the low-melting-point fiber net are arranged above the net supporting curtain; a suction device is arranged below the net supporting curtain and opposite to the water stabs; the circular drum spunlace device comprises a circular drum and a plurality of spunlace heads which are arranged on the outer side of the circular drum and face the surface of the circular drum.
Preferably, the drying unit comprises a hot air through-air oven.
The production device of the invention has the working process that: the low-melting-point fiber web is conveyed into an electret area of the powder particle applying unit through a conveying roller and passes through the middle of an upper electret needle plate and a lower electret needle plate; the high-voltage electrostatic generator generates a high-voltage electric field, the tail end of the electret needle plate generates corona discharge, and corona ionic charges are deposited on the fiber web to enable the fiber web with low melting point to obtain charges; feeding the low-melting-point fiber web with charges into an adsorption zone, and transferring the negative ion powder particles to a vibrating screen through a powder homogenizing roller and a powder stripping roller after the negative ion powder particles are heated from a feed hopper; through the shaking of the vibrating screen, the negative ion powder particles are uniformly distributed on the low-melting-point fiber net and are adsorbed by the charged fibers; the non-adsorbed powder particles fall into a recovery device and are sent back to the feed hopper again; sending the low-melting-point fiber net adsorbing the powder particles into a reinforcing area and allowing the low-melting-point fiber net to pass through the middle of a far infrared heating pipe; melting the low-melting-point component in the low-melting-point fiber at high temperature, and bonding the negative ion powder particles and the fiber into a whole to prepare a second fiber layer;
unwinding a third fiber layer (such as polypropylene spun-bonded hot-rolled non-woven fabric) and introducing the unwound third fiber layer onto a supporting screen; the second fiber layer and the first fiber layer are sequentially superposed on the third fiber layer; the laminated material advances along with the supporting net curtain, and a flat net water stabbing head above the laminated material sprays high-pressure water flow to impact the front side of the laminated material; then the material is sent into a circular drum, and the reverse side of the material is impacted by a circular drum spunlace head, so that the three layers of laminated materials are consolidated into a whole; removing excessive water from the spunlaced material, and drying in a drying unit to obtain the finished product.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention adopts the double-component low-melting-point fiber, and fixes the negative ion powder particles in the fiber net through the powder particle applying unit, thereby solving the problems of low addition amount of the negative ion powder particles, easy falling off and the like of the product in the prior art;
(2) according to the invention, the super-absorbent fiber is arranged in the first fiber layer connected with the negative ion powder particles, so that the super-absorbent fiber can fully absorb moisture in the surrounding environment, the first fiber layer is in a high humidity range, the generation amount of negative ions is effectively increased, the air purification effect is improved, and the problems of small release amount of negative ions, unstable air purification effect and the like of the product in the prior art are solved;
(3) according to the invention, the synthetic antibacterial fiber is added into the first fiber layer which is in contact with the outside, so that the material is prevented from mildewing under the condition that the first fiber layer has high humidity, and the problem that the existing interior decoration material is easy to mildewe is solved;
(4) the production device of the non-woven material capable of releasing the negative ions has the advantages of reasonable design, simple structure, convenience in operation, high production efficiency and suitability for practical popularization.
Drawings
FIG. 1 is a schematic structural view of a nonwoven material capable of releasing negative ions according to example 1 of the present invention;
FIG. 2 is a schematic view showing the connection of the apparatus for producing a negative ion releasable nonwoven material of example 1 of the present invention;
FIG. 3 is a schematic side view of a partial structure of a powder particle applying unit according to embodiment 1 of the present invention;
fig. 4 is a schematic front view of a hopper of an adsorption region of a powder particle application unit in accordance with embodiment 1 of the present invention.
The reference signs are:
the negative ion-releasing nonwoven fabric comprises a first fiber layer 1, a second fiber layer 2, a third fiber layer 3, a low-melting-point fiber web 4, a powder applying unit 5, a superposition and reinforcement unit 6, a drying unit 7 and a nonwoven material 8 capable of releasing negative ions;
an electret region 501, an adsorption region 502, a reinforcement region 503, a transmission roller 504, a high-voltage electrostatic generator 5011, an electret faller 5012, a feed hopper 5021, a feed hopper heater 5022, a flour homogenizing roller 5023, a flour peeling roller 5024, a vibrating screen 5025, a pipeline 5026, a powder storage container 5027, a return hopper 5028, a suction pump 5029 and a far infrared heating pipe 5031;
a composite guide roller 601, a unreeling frame 602, a flat screen spunlace head 603, a suction device 604, a supporting screen curtain 605, a round drum 606, a guide roller 607 and a round drum spunlace head 608;
a hot air penetrating type oven 701 and a lap former 702.
Detailed Description
The present invention will be further described with reference to the following examples.
General examples
A non-woven material capable of releasing negative ions, the mass per unit area is 60-200 g/m2As shown in fig. 1, the fabric comprises a first fiber layer 1, a second fiber layer 2 and a third fiber layer 3 which are sequentially overlapped and connected; the first fiber layer contains super absorbent fibers with water absorption rate of 50-100 times and antibacterial fibers (preferably synthetic antibacterial fibers)Dimension); the second fiber layer comprises low-melting-point fibers (preferably polypropylene/polyester sheath-core bicomponent fiber filaments with a sheath-core ratio of 30/70-70/30) and negative ion powder particles (800-2000 meshes) attached to the low-melting-point fibers; the third fibrous layer is composed of hydrophobic fibers (preferably polypropylene spun-bonded thermo-bonded nonwoven).
Wherein the first fiber layer accounts for 10-40% of the total mass of the material; the super-absorbent fibers account for 10-50% of the mass of the first fiber layer; the second fiber layer accounts for 40-60% of the total mass of the material; the negative ion powder particles account for 10-20% of the total mass of the material; the third fiber layer accounts for 10-30% of the total mass of the material.
A non-woven material production device capable of releasing negative ions comprises a powder applying unit 5, a superposition and reinforcement unit 6 and a drying unit 7 which are connected in sequence according to the advancing direction of a low-melting-point fiber web 4 as shown in figure 2. Wherein:
as shown in fig. 2, the powder particle applying unit comprises an electret area 501, an adsorption area 502 and a reinforcement area 503 which are isolated from each other and sequentially connected in the low-melting-point fiber web advancing direction; between the zones are transfer rolls 504 for the transport of the low melting web.
As shown in fig. 3-4, the adsorption zone comprises a powder storage container 5027, a feed hopper 5021, a flour homogenizing roller 5023, a flour stripping roller 5024, a vibrating screen 5025 and a return hopper 5028; a feed hopper heater 5022 is arranged on the feed hopper, a powder homogenizing roller and a powder stripping roller which are matched with each other are sequentially arranged below the feed hopper, a vibrating screen is arranged below the powder stripping roller, and the vibrating screen is positioned right above the low-melting-point fiber net; the return hopper is positioned right below the low-melting-point fiber web; the powder storage container and the return hopper each feed the feed hopper via line 5026 and suction pump 5029. A high-voltage electrostatic generator 5011 and an electret needle plate 5012 which are matched with each other are arranged in the electret area; the electret fallers are respectively arranged on the upper side and the lower side of the low-melting-point fiber web and face the low-melting-point fiber web. As shown in fig. 2, a plurality of far infrared heating pipes 5031 distributed on the upper and lower sides of the low melting point fiber web are arranged in the reinforcing area.
As shown in fig. 2, the folding and reinforcing unit includes a composite guide roller 601, a flat-screen hydroentangling device and a circular drum hydroentangling device which are connected in sequence. The flat-web hydroentangling device comprises an endless circularly rotating supporting web curtain 605 and a plurality of guide rollers 607 for conveying the supporting web curtain; the composite guide roller is arranged in front of the flat screen spunlace device and above the screen supporting curtain; an unreeling frame 602 is arranged in front of the flat screen spunlace device and below the screen supporting curtain. A plurality of flat net water stabs 603 facing to the low-melting-point fiber net are arranged above the net supporting curtain; a suction device 604 is arranged below the net supporting curtain and opposite to the flat net water stabs; the drum hydro-entangling device includes a drum 606 and a plurality of drum hydro-entangling heads 608 disposed outside the drum and facing the surface of the drum.
The drying unit includes a hot air through-type oven 701 and a lap former 702.
A method of making a negative ion releasable nonwoven material comprising the steps of:
(1) carrying out electret treatment (electret voltage is 25-50 kV, electret distance is 4-8 cm) on a low-melting-point fiber net (a net is formed by directly laying after spinning without any rolling and reinforcing), adsorbing negative ion powder particles on the low-melting-point fiber net through a powder particle applying unit (the powder flow rate is 5-10 g/s, the temperature is 80-120 ℃), and obtaining the low-melting-point fiber net adsorbed with the negative ion powder particles; continuing to roll the low-melting-point fiber web;
(2) carrying out far infrared drying treatment at 150-170 ℃ on the low-melting-point fiber web adsorbed with the negative ion powder particles to melt low-melting-point fibers so as to fix the negative ion powder particles, and preparing a second fiber layer;
(3) mixing super absorbent fibers and antibacterial fibers, and forming a first fiber layer by a dry method;
(4) sequentially superposing the first fiber layer, the second fiber layer and the third fiber layer, and then carrying out front-side and back-side spunlace to connect and reinforce the first fiber layer, the second fiber layer and the third fiber layer with each other, and then removing redundant moisture in the material to obtain a wet material;
(5) and (3) carrying out hot air penetration drying at 140-160 ℃ on the wet material to prepare the non-woven material capable of releasing the negative ions.
Example 1
Anion-releasing nonWoven material having a mass per unit area of 60g/m2As shown in fig. 1, the fabric comprises a first fiber layer 1, a second fiber layer 2 and a third fiber layer 3 which are sequentially overlapped and connected; the first fiber layer contains super absorbent fibers with water absorption rate of 80 times and synthetic antibacterial fibers; the second fiber layer comprises low-melting-point fibers (polypropylene/polyester sheath-core bicomponent fiber filaments with a sheath-core ratio of 30/70) and negative ion powder particles (800 meshes) attached to the low-melting-point fibers; the third fiber layer is polypropylene spun-bonded hot-rolled non-woven fabric.
Wherein the first fiber layer accounts for 10% of the total mass of the material; the super absorbent fibers account for 10% of the mass of the first fiber layer; the second fiber layer accounts for 60% of the total mass of the material; the negative ion powder particles account for 20% of the total mass of the material; the third fibrous layer accounted for 30% of the total mass of the material.
A non-woven material production device capable of releasing negative ions comprises a powder applying unit 5, a superposition and reinforcement unit 6 and a drying unit 7 which are connected in sequence according to the advancing direction of a low-melting-point fiber web 4 as shown in figure 2. Wherein:
as shown in fig. 2, the powder particle applying unit comprises an electret area 501, an adsorption area 502 and a reinforcement area 503 which are isolated from each other and sequentially connected in the low-melting-point fiber web advancing direction; the zones are located in an enclosed box with transfer rolls 504 for low melt web transfer therebetween.
As shown in fig. 3-4, the adsorption zone comprises a powder storage container 5027, a feed hopper 5021, a flour homogenizing roller 5023, a flour stripping roller 5024, a vibrating screen 5025 and a return hopper 5028; a feed hopper heater 5022 is arranged on the feed hopper, a powder homogenizing roller and a powder stripping roller which are matched with each other are sequentially arranged below the feed hopper, a vibrating screen is arranged below the powder stripping roller, and the vibrating screen is positioned right above the low-melting-point fiber net; the return hopper is positioned right below the low-melting-point fiber web; the powder storage container and the return hopper each feed the feed hopper via line 5026 and suction pump 5029. A high-voltage electrostatic generator 5011 and an electret needle plate 5012 which are matched with each other are arranged in the electret area; the electret fallers are respectively arranged on the upper side and the lower side of the low-melting-point fiber web and face the low-melting-point fiber web. As shown in fig. 2, far infrared heating pipes 5031 distributed on the upper and lower sides (7 upper and lower sides) of the low melting point fiber web are arranged in the reinforcing region.
As shown in fig. 2, the folding and reinforcing unit includes a composite guide roller 601, a flat-screen hydroentangling device and a circular drum hydroentangling device which are connected in sequence. The flat-wire hydroentangling device comprises an endless, circularly rotating supporting wire curtain 605 and a guide roller 607 for conveying the supporting wire curtain; the composite guide roller is arranged in front of the flat screen spunlace device and above the screen supporting curtain; an unreeling frame 602 is arranged in front of the flat screen spunlace device and below the screen supporting curtain. 3 flat net water stabs 603 facing to the low-melting-point fiber net are arranged above the net supporting curtain; a suction device 604 is arranged below the net supporting curtain and opposite to the flat net water stabs; the drum hydro-entangled device includes a drum 606 and 2 drum hydro-entangled heads 608 arranged outside the drum and facing the surface of the drum.
The drying unit includes a hot air through-type oven 701 and a lap former 702.
A method of making a negative ion releasable nonwoven material comprising the steps of:
(1) performing electret treatment (electret voltage is 35kV, electret distance is 5cm) on a low-melting-point fiber net (a net is formed by directly laying after spinning without any rolling and reinforcement), and adsorbing negative ion powder particles on the low-melting-point fiber net through a powder particle applying unit (the powder flow rate is 5g/s, the temperature is 80 ℃), so as to obtain the low-melting-point fiber net adsorbed with the negative ion powder particles; continuing to roll the low-melting-point fiber web;
(2) far infrared drying treatment is carried out on the low-melting-point fiber net absorbed with the negative ion powder particles at 150 ℃, so that the low-melting-point fibers are melted to fix the negative ion powder particles, and a second fiber layer is prepared;
(3) mixing super absorbent fibers and antibacterial fibers, and forming a first fiber layer by a dry method;
(4) sequentially superposing the first fiber layer, the second fiber layer and the third fiber layer, and then carrying out front-side and back-side spunlace to connect and reinforce the first fiber layer, the second fiber layer and the third fiber layer with each other, and then removing redundant moisture in the material to obtain a wet material;
(5) and (3) carrying out hot air penetration drying at 140 ℃ on the wet material, controlling the water content of the first fiber layer to be 40%, and preparing the non-woven material capable of releasing negative ions.
Example 2
A non-woven material capable of releasing negative ions, the mass per unit area is 120g/m2As shown in fig. 1, the fabric comprises a first fiber layer 1, a second fiber layer 2 and a third fiber layer 3 which are sequentially overlapped and connected; the first fiber layer contains super absorbent fibers with water absorption rate of 80 times and synthetic antibacterial fibers; the second fiber layer comprises low-melting-point fibers (polypropylene/polyester sheath-core bicomponent fiber filaments with a sheath-core ratio of 50/50) and anion powder particles (1200 meshes) attached to the low-melting-point fibers; the third fiber layer is polypropylene spun-bonded hot-rolled non-woven fabric.
Wherein the first fiber layer accounts for 30% of the total mass of the material; the super absorbent fibers account for 35% of the mass of the first fiber layer; the second fiber layer accounts for 50% of the total mass of the material; the negative ion powder particles account for 15% of the total mass of the material; the third fibrous layer comprises 20% of the total mass of the material.
A device for producing a non-woven material capable of releasing negative ions, which is the same as the device in the embodiment 1.
A method of making a negative ion releasable nonwoven material comprising the steps of:
(1) carrying out electret treatment (electret voltage is 35kV, electret distance is 6cm) on a low-melting-point fiber net (a net is formed by directly laying after spinning without any rolling and reinforcing), adsorbing negative ion powder particles on the low-melting-point fiber net through a powder particle applying unit (the powder flow rate is 7g/s, the temperature is 100 ℃), and obtaining the low-melting-point fiber net adsorbed with the negative ion powder particles; continuing to roll the low-melting-point fiber web;
(2) carrying out 160 ℃ far infrared drying treatment on the low-melting-point fiber web adsorbed with the negative ion powder particles to melt the low-melting-point fibers so as to fix the negative ion powder particles, and preparing a second fiber layer;
(3) mixing super absorbent fibers and antibacterial fibers, and forming a first fiber layer by a dry method;
(4) sequentially superposing the first fiber layer, the second fiber layer and the third fiber layer, and then carrying out front-side and back-side spunlace to connect and reinforce the first fiber layer, the second fiber layer and the third fiber layer with each other, and then removing redundant moisture in the material to obtain a wet material;
(5) and (3) drying the wet material by penetrating hot air at 150 ℃, and controlling the water content of the first fiber layer to be 25% to prepare the non-woven material capable of releasing negative ions.
Example 3
A non-woven material capable of releasing negative ions, the mass per unit area is 200g/m2As shown in fig. 1, the fabric comprises a first fiber layer 1, a second fiber layer 2 and a third fiber layer 3 which are sequentially overlapped and connected; the first fiber layer contains super absorbent fibers with water absorption rate of 80 times and synthetic antibacterial fibers; the second fiber layer comprises low-melting-point fibers (polypropylene/polyester sheath-core bicomponent fiber filaments with a sheath-core ratio of 70/30) and negative ion powder particles (2000 meshes) attached to the low-melting-point fibers; the third fiber layer is polypropylene spun-bonded hot-rolled non-woven fabric.
Wherein the first fiber layer accounts for 40% of the total mass of the material; the super absorbent fibers account for 35% of the mass of the first fiber layer; the second fiber layer accounts for 40% of the total mass of the material; the negative ion powder particles account for 15% of the total mass of the material; the third fibrous layer comprises 20% of the total mass of the material.
A device for producing a non-woven material capable of releasing negative ions, which is the same as the device in the embodiment 1.
A method of making a negative ion releasable nonwoven material comprising the steps of:
(1) carrying out electret treatment (electret voltage is 50kV and electret distance is 8cm) on a low-melting-point fiber net (a net is formed by directly laying after spinning without any rolling and reinforcing), adsorbing negative ion powder particles on the low-melting-point fiber net through a powder particle applying unit (the powder flow rate is 10g/s and the temperature is 120 ℃), and obtaining the low-melting-point fiber net adsorbed with the negative ion powder particles; continuing to roll the low-melting-point fiber web;
(2) far infrared drying treatment is carried out on the low-melting-point fiber net absorbed with the negative ion powder particles at 170 ℃, so that the low-melting-point fibers are melted to fix the negative ion powder particles, and a second fiber layer is prepared;
(3) mixing super absorbent fibers and antibacterial fibers, and forming a first fiber layer by a dry method;
(4) sequentially overlapping the first fiber layer, the second fiber layer and the third fiber layer, and then carrying out front and back water jetting to connect and reinforce the first fiber layer, the second fiber layer and the third fiber layer with each other, and then removing redundant moisture in the material to obtain a wet material;
(5) and (3) drying the wet material by hot air penetration at 160 ℃, and controlling the water content of the first fiber layer to be 10% to prepare the non-woven material capable of releasing negative ions.
Comparative example 1
A non-woven material capable of releasing negative ions is of a three-layer structure, and all layers are mutually overlapped and connected; wherein the upper fiber layer contains super absorbent fibers; the middle fiber layer contains low-melting-point fibers and negative ion powder particles; the negative ion powder particles are fixed on the low-melting-point fiber; the lower fibrous layer is composed of hydrophobic fibers.
It differs from example 2 in that the superabsorbent fibre content of the upper fibrous layer is 5%, all the other things being equal to example 2.
Comparative example 2
A non-woven material capable of releasing negative ions is of a three-layer structure, and all layers are mutually overlapped and connected; wherein the upper fiber layer contains super absorbent fibers; the middle fiber layer contains low-melting-point fibers and negative ion powder particles; the negative ion powder particles are fixed on the low-melting-point fiber; the lower fibrous layer is composed of hydrophobic fibers.
The difference from example 2 is that the content of the negative ion powder particles in the middle fiber layer is 3%, and the other steps are the same as example 2.
Comparative example 3
A non-woven material capable of releasing negative ions is of a three-layer structure, and all layers are mutually overlapped and connected; wherein the upper fiber layer contains super absorbent fibers; the middle fiber layer contains low-melting-point fibers and negative ion powder particles; the negative ion powder particles are fixed on the low-melting-point fiber; the lower fibrous layer is composed of hydrophobic fibers.
The difference from the example 2 is that the synthetic fiber in the upper fiber layer is the common polyester fiber, and the rest is the same as the example 2.
Comparative example 4
A non-woven material capable of releasing negative ions is of a three-layer structure, and all layers are mutually overlapped and connected; wherein the upper fiber layer contains super absorbent fibers; the middle fiber layer contains low-melting-point fibers and negative ion powder particles; the negative ion powder particles are fixed on the low-melting-point fiber; the lower fibrous layer is composed of hydrophobic fibers.
The difference from example 2 is that the particle size of the negative ion powder was 200 mesh, and the rest was the same as example 2.
Comparative example 5
A non-woven material capable of releasing negative ions is of a three-layer structure, and all layers are mutually overlapped and connected; wherein the upper fiber layer contains super absorbent fibers; the middle fiber layer contains low-melting-point fibers and negative ion powder particles; the negative ion powder particles are fixed on the low-melting-point fiber; the lower fibrous layer is composed of hydrophobic fibers.
The difference from the example 2 is that in the step (1) of the preparation method, the electret voltage is 5 ky; the electret distance is 8 cm.
Comparative example 6
A non-woven material capable of releasing negative ions is of a three-layer structure, and all layers are mutually overlapped and connected; wherein the upper fiber layer contains super absorbent fibers; the middle fiber layer contains low-melting-point fibers and negative ion powder particles; the negative ion powder particles are fixed on the low-melting-point fiber; the lower fibrous layer is composed of hydrophobic fibers.
The difference from the example 2 is that in the step (5) of the preparation method, the drying mode is through-hot-air drying; the drying temperature is 170 ℃, and the water content of the upper fiber layer is controlled to be 3%.
Contrast test report
Test items (one): emission amount of negative ions
Testing an instrument: the model is as follows: HY-S001, Instrument manufacturer: beijing Hua diverse and confused.
The testing steps are as follows:
1. a cubic sealed glass box body is arranged, the top cover of the box body can be opened, and the size of the box body is 30cm by 40 cm. The box body is placed in a standard environment for testing;
2. cutting a piece of sample cloth with the size of 25cm by 25cm, and flatly laying the sample cloth at the bottom of the box body;
3. opening the detector, putting the detector in the box body in a horizontal mode with the detector facing upwards, and covering a top cover;
4. values were read every 1 minute and 5 total sets of values were averaged. Unit: per cm3。
(II) test items: formaldehyde removal effect
Testing an instrument: gas chromatograph
The testing steps are as follows:
1. and (3) taking a 10L single-opening sealed plastic bag, and placing the plastic bag in a standard environment to be tested.
2. Cutting 50cm by 50cm cloth sample, and placing in plastic sealed bag.
3. Diluting with formaldehyde solution to 10%, spraying formaldehyde solution into the sealed plastic bag with 20ml spraying pot, and immediately fastening the bag mouth for sealing.
4. After being placed for a week, the content of formaldehyde in the gas in the belt is tested by a gas chromatograph.
(III) test items: odor test Effect
The testing steps are as follows:
1. taking a 5L single-mouth glass bottle, cleaning, and then drying for later use;
2. cutting a piece of 10cm by 10cm sample cloth and putting the sample cloth into a glass bottle;
3. putting into a cigarette suction nozzle by using a 20ml syringe, lighting the cigarette, and extracting cigarette gas;
4. injecting 20ml of cigarette gas into a glass bottle, immediately covering a glass cover and tightly sealing a rubber ring;
5. after being left in a standard environment for 1 week, 5 odor evaluators were allowed to evaluate according to the Jili odor evaluation standard.
Remarks for note
Figure BDA0003443661760000131
(IV) test items: antimicrobial detection
The testing steps are as follows:
1. dissolving Candida albicans standard strain in culture solution, and diluting by 10 times;
2. cutting a 50mm sample cloth with the first fiber layer (upper fiber layer) facing upwards, and placing the sample cloth in a culture dish;
3. transferring 1ml of candida albicans solution to the surface of the cloth sample by using a transfer pipette, and uniformly coating the candida albicans solution on the surface of the cloth sample;
4. placing the culture dish in an incubator with the temperature of 35 ℃ and the humidity of 65 percent for standing for 7 days;
5. after the petri dish was removed, the number of colonies on the surface of the cloth sample was counted and recorded.
Results of test data
Figure BDA0003443661760000141
Analysis of results
(1) As can be seen from the anion emission data, the number of anions detected was the largest in example 2, followed by comparative example 3. Comparative example 4 shows that the number of negative ion particles is 200, and the particle size is increased, which results in the uniformity of particle adhesion and the uniformity of negative ion emission. Comparative example 6 is that the temperature of the final drying process was too high, so that the moisture content in the upper fiber layer was too low, resulting in too little moisture during anion excitation and further reduction of the anion emission. Comparative examples 2 and 5 are to reduce the amount of negative ion powder added and the amount of negative ion attached, respectively, and the actual amount of negative ion emission was affected because the electrostatic electret was weakened, the powder particles could not be attached, and the amount of negative ion powder particles actually attached to the fibers was greatly reduced.
(2) According to the formaldehyde amount detection data, the residual concentration of formaldehyde in the embodiment 2 is the minimum, the residual concentration of formaldehyde and the emission amount of negative ions are in negative correlation, and the higher the negative ion concentration is, the smaller the residual amount of formaldehyde is, and the experiment shows that the negative ions have the effect of removing and decomposing formaldehyde to a certain extent.
(3) According to the odor grade evaluation results, the odor evaluation results of example 2, comparative example 3 and comparative example 4 are good, and the residual odor can be slightly felt but not pungent, but the odor grades of the rest comparative examples are gradually deteriorated, and the pungent odor can be obviously felt. The odor grade results and the emission of negative ions have a positive correlation.
(4) As can be seen from the results of the antibacterial test, the strains of comparative example 6 and comparative example 1 were counted the least, followed by example 2, comparative example 2 and comparative example 5. Comparative examples 1 and 6 contained less moisture on the surface of the upper fiber layer due to the reduction of water-absorbing fibers and overbaking; meanwhile, due to the action of the antibacterial fiber, the produced strains are fewer. It can be seen that the count of the strain of comparative example 3 greatly increased, and the strain was very easy to propagate on the surface of the strain because the upper fiber layer did not adopt antibacterial fiber, so the cloth surface was very easy to get mildewed, which affects the experience.
The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.

Claims (10)

1. A negative ion releasable nonwoven material, characterized by: the composite material comprises a first fiber layer, a second fiber layer and a third fiber layer which are sequentially connected in an overlapping manner; the first fiber layer contains super absorbent fibers and antibacterial fibers; the second fiber layer comprises low-melting-point fibers and negative ion powder particles attached to the low-melting-point fibers; the third fibrous layer is comprised of hydrophobic fibers.
2. The anion releasable nonwoven material of claim 1, wherein:
the first fiber layer accounts for 10-40% of the total mass of the material; the super-absorbent fibers account for 10-50% of the mass of the first fiber layer;
the second fiber layer accounts for 40-60% of the total mass of the material; the negative ion powder particles account for 10-20% of the total mass of the material;
the third fiber layer accounts for 10-30% of the total mass of the material.
3. The anion releasable nonwoven material of claim 1, wherein:
the water absorption rate of the super absorbent fibers is 50-100 times;
the antibacterial fibers in the first fiber layer are synthetic antibacterial fibers.
4. The anion releasable nonwoven material of claim 1, wherein:
the low-melting-point fibers in the second fiber layer are polypropylene/polyester sheath-core bicomponent fibers;
the particle size range of the negative ion powder particles is 800-2000 meshes.
5. The anion releasable nonwoven material of claim 1, wherein: the third fiber layer is polypropylene spun-bonded hot-rolled non-woven fabric.
6. A method of preparing the anion releasable nonwoven material of any of claims 1 to 5, comprising the steps of:
(1) carrying out electret treatment on the low-melting-point fiber web, and then carrying out adsorption treatment on the negative ion powder particles to obtain the low-melting-point fiber web adsorbed with the negative ion powder particles;
(2) heating the low-melting-point fiber web adsorbed with the negative ion powder particles to melt the low-melting-point fibers so as to fix the negative ion powder particles and prepare a second fiber layer;
(3) mixing super absorbent fibers and antibacterial fibers, and forming a first fiber layer by a dry method;
(4) sequentially superposing the first fiber layer, the second fiber layer and the third fiber layer, and then carrying out front-side and back-side spunlace to connect and reinforce the first fiber layer, the second fiber layer and the third fiber layer with each other, and then removing redundant moisture in the material to obtain a wet material;
(5) and drying the wet material to prepare the non-woven material capable of releasing the negative ions.
7. The method of claim 6, wherein: in the step (1), the low-melting-point fiber web is a filament fiber web, and before electret treatment, a web is formed by directly laying the low-melting-point fiber web after spinning without any rolling and reinforcement.
8. The method of claim 7, wherein: in the step (1), the electret voltage of the electret treatment is 25-50 kV, and the electret distance is 4-8 cm.
9. The method of claim 6, 7 or 8, wherein: in the step (1), the raw material is processed,
in the adsorption process, the flow rate of the powder is 5-10 g/s, and the temperature is 80-120 ℃;
and the low-melting-point fiber web adsorbed with the negative ion powder particles is rolled to control the thickness of the fiber web.
10. The method of claim 6, wherein:
in the step (2), far infrared drying is adopted for heating treatment, and the temperature is 150-170 ℃;
in the step (5), hot air is used for drying in a penetrating manner, and the temperature is 140-160 ℃.
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CN111567963A (en) * 2020-05-22 2020-08-25 绍兴市德帏纺织科技有限公司 Multi-layer antibacterial headband
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CN113802267A (en) * 2021-09-01 2021-12-17 杭州诺邦无纺股份有限公司 Fiber dust-absorption non-woven fabric and production method thereof

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Publication number Priority date Publication date Assignee Title
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CN103061038A (en) * 2012-12-14 2013-04-24 浙江理工大学 Tourmaline electret polylactic acid melt-blown non-woven cloth and manufacture method
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