Functional spunlace dusting non-woven fabric and preparation method thereof

Abstract

The invention relates to a functional spunlace dusting non-woven fabric and a preparation method thereof, the functional spunlace dusting non-woven fabric comprises a spunlace non-woven fabric base layer, and the technical key point is that a gum dipping coating and a dusting layer are arranged on the surface of the spunlace non-woven fabric base layer. The impregnation process and the powder scattering process are both completed after the spunlace process, that is, different from a traditional process that impregnation or powder scattering is conducted between a spunlace machine and a drying device, compared with a traditional process, the liquid carrying rate of the product is high, and the functional requirement for the surface stiffness of the product is easily met; and meanwhile, the breadth, the cloth cover style, the physical indexes and the like of the product can be better controlled. The problem that an existing non-woven fabric surface coating easily generates glue points and is uneven is solved, the non-woven fabric has waterproof, oil-proof and stiff functions, can be compounded with sponge, non-woven fabric, woven fabric and the like after being heated, and is good in compounding effect, smooth in surface after being compounded and not prone to generating wrinkles.

Description

Technical Field

[0001] The invention relates to the technical field of nonwoven fabrics, and in particular to a functional spunlace powder-dusted nonwoven fabric and a preparation method thereof. Background Art

[0002] Needle-punched powdered nonwoven fabrics are generally made by powdering needle-punched nonwoven fabrics. Among them, needle-punched nonwoven fabrics are a type of dry nonwoven fabrics. Short fibers are opened, combed, and laid into a fiber web, and then the fiber web is reinforced into cloth through a needle. The needle has hooks and thorns, which repeatedly puncture the fiber web, and the hooks and fibers are reinforced to form needle-punched nonwoven fabrics; the gram weight is generally 80g / m 2 Above, the fiber is coarser and the feel is rougher.

[0003] The traditional lamination processes of non-woven fabrics and other products mainly include adhesive lamination, thermal bonding and powder dot coating. Among them, adhesive lamination contains harmful solvents, which are highly toxic to the environment and human body; thermal bonding has high temperature requirements and uses a lot of resources; and powder dot coating is prone to produce glue spots, affecting the appearance. Summary of the invention

[0004] The purpose of the present invention is to provide a functional spunlace powder-sprinkled non-woven fabric and a preparation method thereof, so as to solve the problem that the surface coating of the existing non-woven fabric is prone to produce glue spots and is not flat. The non-woven fabric has waterproof, oil-proof and stiffening functions, and can be composited with sponges, non-woven fabrics, woven fabrics, etc. after heating. The composite effect is good, and the surface after composite is flat and not easy to produce wrinkles.

[0005] The technical solution of the present invention is:

[0006] A functional spunlace powdered nonwoven fabric comprises a spunlace nonwoven fabric base layer, and its technical key points are: a dipping coating and a powdering layer are provided on the surface of the spunlace nonwoven fabric base layer, and the raw materials of the spunlace nonwoven fabric base layer comprise a first fiber component having a moisture regain of more than 10% and polyester staple fibers; the raw materials of the dipping coating comprise an adhesive, a fluorine-based waterproof and oil-proof processing agent and a maltol MF880C high-efficiency cross-linking agent, and the raw material of the powdering layer is hot-melt adhesive powder.

[0007] In the above-mentioned functional spunlace powdered nonwoven fabric, the first fiber component is viscose staple fiber or cotton fiber or lignin fiber.

[0008] The functional spunlace powder-dusted nonwoven fabric mentioned above, the raw materials of the spunlace nonwoven fabric base layer include 20-50% of the first fiber component and 50-80% of polyester staple fibers.

[0009] The functional spunlace powder-dusted nonwoven fabric mentioned above, the adhesive is nonwoven fabric adhesive TF-W331 or acrylic copolymer.

[0010] In the above functional spunlace powder-dusted nonwoven fabric, the fluorine-based water-proof and oil-proof processing agent is a perfluoroalkyl acrylate copolymer or a fluorocarbon acrylate resin.

[0011] The above-mentioned functional spunlace powder-sprinkled nonwoven fabric, the hot melt adhesive powder is 20-180 mesh PES or HDPE or EVA or PE200.

[0012] A method for preparing the functional spunlace powder-dusted nonwoven fabric as described above, the technical key points of which are as follows:

[0013] Process 1: Spunlace process

[0014] The process of the spunlace process is as follows: raw material proportioning, cotton opening and cleaning, web forming, spunlace reinforcement and roll forming;

[0015] Process 2: Dipping process

[0016] The process of the dipping process is sequentially preparing the reagents for the dipping coating, rolling up the product obtained in process 1, dipping, widening, drying, slitting and winding;

[0017] Step 3: Powdering

[0018] The process of the powdering step is to roll up the product obtained in step 2, humidify, powder, hot melt, cold press and roll.

[0019] The method for preparing the functional spunlace powdered nonwoven fabric, the spunlace process specifically comprises the following steps:

[0020] Step 1, raw material ratio: prepare 20-50% of the first fiber component and 50-80% of polyester staple fiber;

[0021] Step 2, cotton opening and cleaning: the first fiber component and the polyester staple fiber are respectively sent to the first bale opener and the second bale opener for preliminary opening, and then respectively enter the same middle warehouse mixing box through the first and second bale openers to further open and loosen into small clusters of fibers and mix them;

[0022] Step 3, web forming: the mixed raw materials in the middle warehouse mixing box are sent to the final cotton box for storage through the conveying pipeline, and the mixed raw materials in the final cotton box are then transported to the air pressure cotton box through the pipeline, and the air pressure cotton box evenly distributes the raw materials; the air pressure cotton box sends the distributed mixed raw materials to the carding machine through the net curtain, and the carding machine combs them into a fiber web; the fiber web combed by the carding machine is conveyed to the cross-lapping machine through the net curtain, and the cross-lapping machine stacks the single-layer fiber webs together to form a uniform multi-layer fiber web; the laid multi-layer fiber web is conveyed to the drafting machine through the net curtain, and passes through multiple drafting rollers to reduce the thickness of the fiber web, increase the width of the fiber web and increase the strength of the finished product;

[0023] Step 4, hydroentanglement reinforcement: the multi-layer fiber web obtained in step 3 is transported into a hydroentanglement machine through a mesh curtain, and is pre-wetted and subjected to multiple positive and reverse high-pressure hydroentanglement, a suction mesh curtain, and multiple suction devices to form a wet hydroentangled nonwoven fabric; the wet hydroentangled nonwoven fabric is transported into a drying device for drying to form a hydroentangled nonwoven fabric;

[0024] Step 5, rolling: rolling the spunlace nonwoven fabric obtained in step 4 into a roll for later use.

[0025] The preparation method of the functional spunlace powder-dusted nonwoven fabric, the dipping process specifically comprises the following steps:

[0026] Step 1, prepare reagents: dilute and mix the three raw materials of adhesive, fluorine-based waterproof and oil-proof processing agent and wheat polyphenol MF880C high-efficiency cross-linking agent with water respectively, then add them into a stirring barrel according to the set order, and then add the remaining water and stir evenly to form a dipping glue solution;

[0027] Step 2, rolling up: putting the rolled spunlace nonwoven fabric produced in step 1 onto the unwinding rack;

[0028] Step 3, dipping: the unrolled spunlace nonwoven fabric is transferred to a glue tank storing dipping glue solution by a transmission roller, and is squeezed by a rubber roller to form a wet spunlace fabric with a liquid content of 160-200%;

[0029] Step 4, expansion and drying: The wet spunlace fabric is transferred to the expansion track in front of the drying device via the transmission roller, and the distance between the two tracks of the expansion track is gradually increased. The expansion track transports the wet spunlace fabric into the drying device for expansion and drying to form a dipped coating;

[0030] Step 5, slitting and winding: The dried spunlace product is conveyed to the winding machine via a transfer roller for slitting and winding.

[0031] The method for preparing the functional spunlace powdered nonwoven fabric, the powdering process specifically comprises the following steps:

[0032] Step 1, rolling up and humidifying: put the rolled spunlace nonwoven fabric produced in step 1 onto the unwinding rack, and equip a humidifier at a set distance from the center of the unwinding rack to ensure that the ambient humidity is above 95% when the fabric roll is unwound;

[0033] Step 2: Powdering: The unwound spunlace nonwoven fabric is transferred to the powdering device through the transmission roller, and the powdering device sprinkles 15-25g / m 2 Hot melt adhesive powder;

[0034] Step 3, hot melting: the cloth surface sprinkled with hot melt adhesive powder is transported into the drying device through the net curtain to melt the adhesive powder;

[0035] Step 4, cold pressing: The cloth with the melted hot melt adhesive powder is transported to the cold pressing roller through the mesh curtain, so that the adhesive powder is quickly cooled and firmly combined with the cloth to form a powder coating;

[0036] Step 5, slitting and winding: The cooled spunlace product is transported to the winding machine via a transfer roller for slitting and winding.

[0037] The beneficial effects of the present invention are:

[0038] 1. Spunlace nonwoven fabric is a nonwoven material made by spraying high-pressure fine water flow onto one or more layers of fiber webs to entangle the fibers with each other, thereby reinforcing the fiber webs. Compared with needle-punched nonwoven fabrics, the surface is generally thinner, the feel is more delicate, and the gram weight can be made relatively low. When the corresponding functions are met, the amount of raw materials used can be saved. The dipped coating and powder coating on the surface of the spunlace nonwoven fabric make the product waterproof, oil-proof and stiff. After heating, it can be effectively compounded with sponges, nonwoven fabrics, woven fabrics, etc. Among them, the reagents in the dipped coating are evenly distributed on the surface of the fiber material and cross-linked to play a functional role; and the hot melt adhesive powder used in the powder layer is bonded and penetrated into the surface fibers of the nonwoven fabric, and both significantly enhance the composite effect. It solves the problem that the surface coating of the existing nonwoven fabric is prone to produce glue spots and is not flat. After compounding with sponges, nonwoven fabrics, woven fabrics, etc., the surface is flat and not easy to wrinkle.

[0039] 2. The dipping process and the powdering process are both completed after the spunlace process, that is, different from the traditional dipping or powdering between the spunlace machine and the drying device, compared with the traditional process, the product of the present invention has a high liquid carrying rate, which is conducive to achieving the functional requirement of stiffening the product surface; at the same time, the present invention can better control the product width, fabric style, physical indicators (including breaking strength, breaking elongation, thermal shrinkage), etc. DETAILED DESCRIPTION

[0040] The present invention is described in detail below by way of examples.

[0041] Example

[0042] The functional spunlace powdered nonwoven fabric of the present invention comprises a spunlace nonwoven base layer, and a dipping coating and a powdering layer are provided on the surface of the spunlace nonwoven base layer. The raw materials of the spunlace nonwoven base layer include a first fiber component with a moisture regain of more than 10% and polyester staple fibers. The raw materials of the dipping coating include an adhesive, a fluorine-based waterproof and oil-proof processing agent, and a MF880C high-efficiency cross-linking agent, and the raw material of the powdering layer is hot melt adhesive powder.

[0043] The first fiber component is viscose staple fiber or cotton fiber or lignin fiber. The raw materials of the spunlace non-woven fabric base layer include 20-50% of the first fiber component and 50-80% of polyester staple fiber. The adhesive is a non-woven fabric adhesive TF-W331 (a commercially available product of Chuanhua Zhilian Co., Ltd.) or other acrylic copolymers. The fluorine-based waterproof and oil-proof processing agent is a perfluoroalkyl acrylic copolymer or an acrylic fluorocarbon resin. The hot melt adhesive powder is 20-180 mesh PES or HDPE or EVA or PE200.

[0044] In this embodiment, the method for preparing the functional spunlace powdered nonwoven fabric comprises a spunlace step, a glue dipping step and a powdering step in sequence.

[0045] Among them, the spunlace process is first performed, which specifically includes the following steps:

[0046] Step 1. Raw material ratio: prepare 40% by weight of viscose staple fiber 1.56dT*38mm (linear density and length specifications of the fiber) and 60% by weight of polyester staple fiber 1.56dT*38mm.

[0047] Step 2, cotton opening and cleaning: send the viscose staple fiber and polyester staple fiber to the first bale opener and the second bale opener respectively for preliminary opening, and then pass through the first and second bale openers respectively into the same middle warehouse mixing box for further fine opening to small clusters of fibers and mixing.

[0048] Step 3, web formation: the mixed raw materials in the middle cotton mixing box are sent to the final cotton box for storage through the conveying pipeline, and the mixed raw materials in the final cotton box are then transported to the air pressure cotton box through the pipeline. The air pressure cotton box evenly distributes the raw materials. Among them, the final cotton box: cotton box pressure: 250-300hz; beater: 40-50hz; cotton conveying fan: 40-50hz. The air pressure cotton box sends the distributed mixed raw materials to the carding machine through the net curtain, and the carding machine combs them into a fiber web. Among them, the air pressure cotton box: cotton box pressure: 280-330hz; beater: 45-55hz; four cotton conveying fans are used, respectively: 25-30hz. The fiber web combed by the carding machine is transmitted to the cross-lapping machine via the net curtain, and the cross-lapping machine stacks the single-layer fiber web together to form a uniform multi-layer fiber web, among which, the carding machine productivity: 45-55%; online coefficient: 1; cylinder working roller: 100-120hz; main cylinder 900-1100hz; upper doffer 50-55hz; lower doffer: 50-55hz; upper stripping roller: 45-50hz; lower stripping roller: 45-50hz; upper net curtain: 45-50hz; lower net curtain: 45-50hz. The input speed of the cross-lapping machine is 45-50hz; the output speed is 45-50hz; the speed ratio is 110-115%; the front width is 1850-1950mm; the cross width is 180-220mm; the net entry width is 2800-3000mm; the rear width is 1900-2100mm; the number of net layers is 7-9 layers. The laid multi-layer fiber net is transported to the drafting machine through the net curtain, and through multiple drafting rollers, the thickness of the fiber net is reduced, the width of the fiber net is increased, and the strength of the finished product is increased. Among them, the drafting ratio of the drafting machine is 2.00-2.15%; the drafting net entry curtain is 100-150hz; 9 drafting rollers are used, each of which is 100-150hz; the drafting output curtain is 80-100hz.

[0049] Step 4, hydroentanglement reinforcement: The multi-layer fiber web obtained in step 3 is transported into the hydroentanglement machine through the mesh curtain, and is made into a wet hydroentanglement non-woven fabric after pre-wetting and 8 positive and reverse high-pressure hydroentanglements, suction mesh curtains, and 3 suction fans; the wet hydroentanglement non-woven fabric is transported into a drying device for drying to make a hydroentanglement non-woven fabric.

[0050] Among them, the unified speed of the spunlace machine is: 10-13hz; monotonous speed: 10-13hz; long curtain 1 speed: 90-110hz; trawl speed: 90-110hz; 1# roller speed 90-110hz; 2# roller speed 90-110hz; 3# roller speed 90-110hz; flat net speed: 100-120hz; padding speed: 90-110hz; sizing roller speed: 90-110hz; roll speed: 90-110hz; pre-wetting pump Pressure: 35-45hz; 1# pump pressure: 25-30hz; 2# pump pressure: 55-65hz; 3# pump pressure: 30-40hz; 4# pump pressure: 80-90hz; 5# pump pressure: 15-25hz; 6# pump pressure: 40-50hz; 7# pump pressure: 40-50hz; 8# pump pressure: 65-75hz; 3 suction fans are used, the pressure of the first two suction fans is 40-50hz; the pressure of the third suction fan is 30-40hz.

[0051] The drying device uses two drying drums, 90-110hz respectively; temperature: 110-120℃; circulation fan: 45-55hz; exhaust fan: 45-55hz; speed ratio: 95-105%.

[0052] Step 5, rolling: rolling the spunlace nonwoven fabric obtained in step 4 into a roll for standby use. Adjustment speed percentage: 95-105%; driving speed: 10-13 Hz.

[0053] Next, the dipping process is performed, which specifically includes the following steps:

[0054] Step 1. Prepare reagents: dilute and mix 10% non-woven fabric adhesive TF-W331 (commercially available from Chuanhao Zhilian Co., Ltd.), 2.5% fluorine-based waterproof and oil-proof processing agent TF-4116G (commercially available from Chuanhao Zhilian Co., Ltd.) and 1.25% wheat polyphenol MF880C high-efficiency cross-linking agent by weight with 20% water, stir for 2 minutes, then add to the stirring barrel according to the set order, add the remaining water, stir evenly to form a dipping glue solution, stir at 100r / min with a stirring paddle, and stir for 20 minutes.

[0055] Among them, water (pH value of about 7) accounts for 86.25% (tap water) in the dipping glue solution.

[0056] Step 2, rolling up: Put the rolled spunlace nonwoven fabric produced in step 1 onto the unwinding rack, which is an automatic unwinding rack without tension.

[0057] Step 3, dipping: the unrolled spunlace nonwoven fabric is transferred to a glue tank storing dipping glue via a transmission roller (the tension between all transmission rollers is adjusted to ensure that the fabric surface is not in a stretched state), and is squeezed by a rubber roller (the gap between the two rubber rollers is not more than 0.2 mm) to form a wet spunlace fabric with a liquid rate of 160-200%;

[0058] Step 4, expansion and drying: The wet spunlace fabric is transmitted to the expansion track in front of the drying device via the transmission roller. The distance between the two tracks of the expansion track is gradually increased. There are rows of needles on the track. The two sides of the door width are hung on the needles to fix the spunlace fabric. The expansion track rotates to transport the wet spunlace fabric into the drying room for expansion and drying to form a dipped coating. This operation is to ensure the door width and elongation indicators during the production process.

[0059] Among them, the door width adjustment parameters are: 1# point: 1550-1555mm; 2# point: 1600-1610mm; 3# point: 1600-1650mm; 4# point: 1650-1653mm; the 4 points are evenly distributed in the front half of the track, and there is a short section of needle track at the points at both ends of the width, which has a certain angle with the upper and lower sections of the track. This angle is adjusted according to the width set by the first two sections of the track, so as to achieve the purpose of expanding the width.

[0060] Drying room temperature control parameters: 8 drying rooms are: 145-150℃; 145-150℃; 145-150℃; 190-195℃; 190-195℃; 145-150℃; 195-205℃; 195-205℃. Drying room fan parameters: 28-33hz.

[0061] Step 5, slitting and winding: The dried spunlace product is transported to the winding machine through the transfer roller for slitting and winding. The tension of the whole device ensures that the fabric surface is not in a stretched state. Winding speed ratio: 100-102%; Winding machine tension: 0-2hz.

[0062] Next, the powdering process is carried out, which specifically includes the following steps:

[0063] Step 1, rolling up and humidifying: Put the rolled spunlace nonwoven fabric produced in step 1 onto the unwinding rack, and install a humidifier 50 cm away from the center of the unwinding rack to ensure that the ambient humidity is above 95% when the fabric is unwound.

[0064] Step 2: Powdering: The unwound spunlace nonwoven fabric is transferred to the powdering device through the transmission roller, and the powdering device sprinkles 15-25g / m 2of hot melt adhesive powder (HDPE-55 mesh); among them, automatic unloading powder spreading speed ratio: 17%; brush (the powder spreading part is composed of an inverted cone-shaped hopper, the bottom of the hopper is a rotatable roller with small pits, and the side of the roller is composed of brushes that can continuously sweep up and down; the brush will brush the hot melt adhesive powder adsorbed by static electricity and filled in the small pits onto the cloth surface) frequency conversion: 20-22hz (the rotation speed of the brush can be controlled, the faster the frequency, the faster the rotation speed).

[0065] Step 3, hot melting: the cloth surface sprinkled with hot melt adhesive powder is transported into the drying device through the net curtain to melt the adhesive powder; the drying device adopts a drying room, and the temperature setting is: front section: 190-200℃; rear section: 190-200℃; net curtain running speed: 12-18m / min.

[0066] Step 4, cold pressing: The cloth with the melted hot melt adhesive powder is transported into the cold pressing roller through the mesh curtain, so that the adhesive powder is quickly cooled and firmly combined with the cloth to form a powder coating; the surface temperature of the cold pressing roller is 5-15℃; the gap between the two cold pressing rollers is not more than 0.05mm.

[0067] Step 5, slitting and winding: The cooled spunlace product is transported to the winding machine through the transfer roller for slitting and winding. The tension of the whole device ensures that the fabric surface is not in a stretched state. Among them, the winding speed ratio is: 100-102%; the winding machine tension is: 0-2hz.

[0068] Comparative Example 1: Raw material proportioning → cotton opening and cleaning → carding → web laying → hot rolling → powdering.

[0069] Comparative Example 2: Raw material proportioning → cotton opening and cleaning → web forming → hydroentanglement → glue dipping → powder spreading → hot air drying → roll forming.

[0070] The following is a test comparison of the products made in the embodiment of the present invention and the products made in Comparative Examples 1 and 2:

[0071]

[0072]

[0073] The above embodiments of the present invention are described in detail, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the invention should still fall within the scope of this patent.

Claims

1. A functional spunlace powdered nonwoven fabric, comprising a spunlace nonwoven fabric base layer, characterized in that: The surface of the spunlace non-woven fabric base layer is provided with a dipped coating and a powdering layer. The raw materials of the spunlace non-woven fabric base layer include a first fiber component with a moisture regain of more than 10% and polyester staple fibers; the raw materials of the dipped coating include adhesives, fluorine-based waterproof and oil-proof processing agents and MF880C high-efficiency cross-linking agent, and the raw material of the powdering layer is hot-melt adhesive powder.

2. The functional spunlace powder-dusted nonwoven fabric according to claim 1, characterized in that: The first fiber component is viscose staple fiber, cotton fiber or lignin fiber.

3. The functional spunlace powder-dusted nonwoven fabric according to claim 1, characterized in that: The raw materials of the spunlace nonwoven fabric base layer include 20-50% of the first fiber component and 50-80% of polyester staple fibers.

4. The functional spunlace powder-dusted nonwoven fabric according to claim 1, characterized in that: The adhesive is non-woven adhesive TF-W331 or other acrylic copolymers.

5. The functional spunlace powder-dusted nonwoven fabric according to claim 1, characterized in that: The fluorine-based water-proof and oil-proof processing agent is a perfluoroalkyl acrylate copolymer or a fluorocarbon acrylate resin.

6. The functional spunlace powder-dusted nonwoven fabric according to claim 1, characterized in that: The hot melt adhesive powder is 20-180 mesh PES or HDPE or EVA or PE200.

7. A method for preparing the functional spunlace powder-dusted nonwoven fabric according to any one of claims 1 to 6, characterized in that: include: Process 1: Spunlace process The process of the spunlace process is as follows: raw material proportioning, cotton opening and cleaning, web forming, spunlace reinforcement and roll forming; Process 2: Dipping process The process of the dipping process is sequentially preparing the reagents for the dipping coating, rolling up the product obtained in process 1, dipping, widening, drying, slitting and winding; Step 3: Powdering The process of the powdering step is to roll up the product obtained in step 2, humidify, powder, hot melt, cold press and roll.

8. The method for preparing the functional spunlace powder-dusted nonwoven fabric according to claim 7, characterized in that: The spunlacing process specifically includes the following steps: Step 1, raw material ratio: prepare 20-50% of the first fiber component and 50-80% of polyester staple fiber; Step 2, cotton opening and cleaning: the first fiber component and the polyester staple fiber are respectively sent to the first bale opener and the second bale opener for preliminary opening, and then respectively enter the same middle warehouse mixing box through the first and second bale openers to further open and loosen into small clusters of fibers and mix them; Step 3, web forming: the mixed raw materials in the middle warehouse mixing box are sent to the final cotton box for storage through the conveying pipeline, and the mixed raw materials in the final cotton box are then transported to the air pressure cotton box through the pipeline, and the air pressure cotton box evenly distributes the raw materials; the air pressure cotton box sends the distributed mixed raw materials to the carding machine through the net curtain, and the carding machine combs them into a fiber web; the fiber web combed by the carding machine is conveyed to the cross-lapping machine through the net curtain, and the cross-lapping machine stacks the single-layer fiber webs together to form a uniform multi-layer fiber web; the laid multi-layer fiber web is conveyed to the drafting machine through the net curtain, and passes through multiple drafting rollers to reduce the thickness of the fiber web, increase the width of the fiber web and increase the strength of the finished product; Step 4, hydroentanglement reinforcement: the multi-layer fiber web obtained in step 3 is transported into a hydroentanglement machine through a mesh curtain, and is pre-wetted and subjected to multiple positive and reverse high-pressure hydroentanglement, a suction mesh curtain, and multiple suction devices to form a wet hydroentangled nonwoven fabric; the wet hydroentangled nonwoven fabric is transported into a drying device for drying to form a hydroentangled nonwoven fabric; Step 5, rolling: rolling the spunlace nonwoven fabric obtained in step 4 into a roll for later use.

9. The method for preparing a functional spunlace powder-dusted nonwoven fabric according to claim 7, characterized in that: The dipping process specifically comprises the following steps: Step 1, prepare reagents: dilute and mix the three raw materials of adhesive, fluorine-based waterproof and oil-proof processing agent and wheat polyphenol MF880C high-efficiency cross-linking agent with water respectively, then add them into a stirring barrel according to the set order, and then add the remaining water and stir evenly to form a dipping glue solution; Step 2, rolling up: putting the rolled spunlace nonwoven fabric produced in step 1 onto the unwinding rack; Step 3, dipping: the unrolled spunlace nonwoven fabric is transferred to a glue tank storing dipping glue solution by a transmission roller, and is squeezed by a rubber roller to form a wet spunlace fabric with a liquid content of 160-200%; Step 4, expansion and drying: The wet spunlace fabric is transferred to the expansion track in front of the drying device via the transmission roller, and the distance between the two tracks of the expansion track is gradually increased. The expansion track transports the wet spunlace fabric into the drying device for expansion and drying to form a dipped coating; Step 5, slitting and winding: The dried spunlace product is conveyed to the winding machine via a transfer roller for slitting and winding.

10. The method for preparing the functional spunlace powder-dusted nonwoven fabric according to claim 7, characterized in that: The powdering process specifically comprises the following steps: Step 1, rolling up and humidifying: put the rolled spunlace impregnated nonwoven fabric produced in step 2 onto the unwinding rack, and equip a humidifier at a set distance from the center of the unwinding rack to ensure that the ambient humidity is above 95% when the fabric roll is unwound; Step 2: Powdering: The unwound spunlace nonwoven fabric is transferred to the powdering device through the transmission roller, and the powdering device sprinkles 15-25g / m 2 Hot melt adhesive powder; Step 3, hot melting: the cloth surface sprinkled with hot melt adhesive powder is transported into the drying device through the net curtain to melt the adhesive powder; Step 4, cold pressing: The cloth with the melted hot melt adhesive powder is transported to the cold pressing roller through the mesh curtain, so that the adhesive powder is quickly cooled and firmly combined with the cloth to form a powder layer; Step 5, slitting and winding: The cooled spunlace product is transported to the winding machine via a transfer roller for slitting and winding.

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