A production line for a water-absorbent core composite non-woven fabric and its production method

Abstract

This application relates to the field of composite non-woven fabric manufacturing. More specifically, it relates to a production line and a production method for a water-absorbent core composite non-woven fabric, including a meltblown device for spraying meltblown fibers, a cotton-making device for spraying short fiber cotton, and a feeding device for spraying superabsorbent resin. Among them, the cotton outlet of the cotton-making device and the discharge outlet of the feeding device are respectively arranged adjacent to the left and right sides of the meltblown head of the meltblown device, so that the sprayed meltblown fibers, short fiber cotton, and superabsorbent resin are mixed to form a mixed fiber web, and the mixed fiber web is sandwiched between two preset surface layer non-woven fabrics and formed into a composite non-woven fabric. This application aims to solve the problems of poor embedding and uneven distribution of superabsorbent resin in traditional water-absorbent cores, fluff pulp caking after water absorption, and the complex structure and unreasonable arrangement of the water-absorbent core production line, which affect production efficiency.

Description

Technical Field

[0001] This application relates to the field of composite non-woven fabric manufacturing, and in particular, to a production line and a production method for a water-absorbent core composite non-woven fabric. Background Art

[0002] The main water-absorbent part of sanitary products such as diapers, urine pads, and sanitary napkins is made of a water-absorbent core. Currently, the water-absorbent core mostly adopts a sprinkling process, randomly spreading water-absorbent materials such as superabsorbent resin and fluff pulp on the non-woven fabric, and using an adhesive to wrap and bond the upper and lower non-woven fabrics to form a shape. This production method of the water-absorbent core will result in poor embedment and uneven distribution of the superabsorbent materials, and problems such as fluff pulp breakage and lumping are likely to occur after the water-absorbent resin absorbs water and swells. At the same time, the existing production lines for producing the above-mentioned water-absorbent cores have problems of complex structure and unreasonable arrangement, which to a certain extent affect the production efficiency. Therefore, it is urgently needed to be solved. Summary of the Invention

[0003] The purpose of this application is to address the above problems and provide a production line and a production method for a water-absorbent core composite non-woven fabric to solve the problems of poor embedment, uneven distribution of superabsorbent resin in traditional water-absorbent cores, fluff pulp lumping after water absorption, and complex structure and unreasonable arrangement of the water-absorbent core production line, which affect the production efficiency.

[0004] The purpose of this application is achieved through the following technical solutions:

[0005] A production line for a water-absorbent core composite non-woven fabric includes a meltblown device for spraying meltblown fibers, a cotton-making device for spraying short fiber cotton, and a feeding device for spraying superabsorbent resin. Among them, the cotton outlet of the cotton-making device and the discharge outlet of the feeding device are respectively arranged adjacent to the left and right sides of the meltblown head of the meltblown device, so that the sprayed meltblown fibers, short fiber cotton, and superabsorbent resin are mixed to form a mixed fiber web, and the mixed fiber web is sandwiched between two preset surface layer non-woven fabrics and formed into a composite non-woven fabric.

[0006] Preferably, it further includes a collection and composite component located downstream of the meltblown device. Among them, the collection and composite component consists of two adjacent negative pressure collection rollers and two unwinders. The two unwinders are respectively used to feed two surface layer non-woven fabrics along the roller surfaces of the two negative pressure collection rollers, and the two surface layer non-woven fabrics and the mixed fiber web meet at the gap between the roller surfaces of the two negative pressure collection rollers for composite.

[0007] Preferably, it further includes a forming machine located downstream of the collection and composite component. Among them, the two composite surface layer non-woven fabrics and the mixed fiber web are transferred to the forming machine for forming a water-absorbent core composite non-woven fabric.

[0008] Preferably, the meltblown device further includes a meltblown machine and a cold air system. The cold air system is respectively installed on both sides of the meltblown machine and is used for cooling and shaping the meltblown material after high-temperature melting.

[0009] Preferably, the cotton-making device further includes a feeding roller, a carding machine and a cotton spraying machine. A blower for spraying short fiber cotton is arranged in the cotton spraying machine.

[0010] Preferably, the feeding device further includes a hopper, a material leveling machine and a transmission device.

[0011] The present application also discloses a production method of an absorbent core composite non-woven fabric, including the following steps:

[0012] S1. Preset the working parameters of the meltblown device, the cotton-making device and the feeding device;

[0013] S2. Activate the meltblown device, the cotton-making device and the feeding device to respectively spray meltblown fibers, short fiber cotton and superabsorbent resin. Among them, the short fiber cotton and the superabsorbent resin are respectively sprayed from both sides of the meltblown fibers so that the meltblown fibers, the short fiber cotton and the superabsorbent resin are mixed to form a mixed fiber web;

[0014] S3. The formed mixed fiber web gradually falls and is clamped between two surface layer non-woven fabrics, and then a net is formed to obtain the required composite non-woven fabric.

[0015] Preferably, in step S3, the two surface layer non-woven fabrics are respectively fed into the roller surfaces of two negative pressure collecting rollers in the composite assembly, and the negative pressure is used to draw the mixed fiber web to converge with the two surface layer non-woven fabrics in the roller surface gap of the two negative pressure collecting rollers for composite.

[0016] Preferably, in step S3, the two composite surface layer non-woven fabrics and the mixed fiber web are transferred to a net-forming machine, and an absorbent core composite non-woven fabric is formed by the net-forming machine.

[0017] The beneficial effects of the present application are as follows: The meltblown fibers are used to replace fluff pulp, which plays a role in immobilizing the superabsorbent resin, so that the superabsorbent resin is evenly distributed among the meltblown fibers. Spraying short fiber cotton can effectively improve the fluffiness of the composite non-woven fabric product of this application, and increase the porosity among the meltblown fibers, improve the fluid conductivity, and avoid the phenomenon of gel blockage after water absorption. The applied cotton spraying device and the superabsorbent resin feeding device are both to enable the short fiber cotton and the superabsorbent resin to be evenly distributed among the fibers in cooperation with the spraying speed of the meltblown fibers. The suction roller in the application is for better collecting meltblown fibers, short fiber cotton, superabsorbent resin, etc. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of a production line of an absorbent core composite non-woven fabric;

[0019] Figure 2 It is a flowchart of a production method for a production line of a water-absorbent core composite non-woven fabric;

[0020] Figure 3 It is a schematic diagram of a meltblowing device in a production line of a water-absorbent core composite non-woven fabric;

[0021] Figure 4 It is a schematic diagram of a cotton-making device in a production line of a water-absorbent core composite non-woven fabric;

[0022] Figure 5 A schematic diagram of a feeding device in a production line of a water-absorbent core composite non-woven fabric.

[0023] In the figure: meltblowing device 1, meltblowing head 1-1, meltblowing machine 1-2, cold air system 1-3, feeding device 2, discharge port 2-1, hopper 2-2, material leveling machine 2-3, transmission device 2-4, cotton-making device 3, cotton outlet 3-1, feeding roller 3-2, opener 3-3, cotton spraying machine 3-4, fan 3-5, unwind machine -4, collecting drum -5, web forming machine -6. Specific embodiments

[0024] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will clearly and completely describe the technical solutions in the embodiments of this application in conjunction with the accompanying drawings in the embodiments of this application.

[0025] Figure 1 It is a schematic diagram of a production line of a water-absorbent core composite non-woven fabric, as Figure 1 shown, a production line of a water-absorbent core composite non-woven fabric includes a meltblowing device 1 for spraying meltblown fibers, a cotton-making device 3 for spraying staple cotton, and a feeding device 2 for spraying superabsorbent resin. Among them, the cotton outlet 3-1 of the cotton-making device 3 and the discharge port 2-1 of the feeding device 2 are respectively arranged adjacent to the left and right sides of the meltblowing head 1-1 of the meltblowing device 1, so that the sprayed meltblown fibers, staple cotton and superabsorbent resin are mixed to form a mixed fiber web, and the mixed fiber web is sandwiched between two preset surface layer non-woven fabrics and formed into a composite non-woven fabric.

[0026] Preferably, it further includes a collecting and composite component located downstream of the meltblowing device 1. Among them, the collecting and composite component consists of two adjacent negative pressure collecting drums 5 and two unwind machines 4. The two unwind machines -4 are respectively used to send two surface layer non-woven fabrics along the roller surfaces of the two negative pressure collecting drums 5, and the two surface layer non-woven fabrics and the mixed fiber web meet at the gap between the roller surfaces of the two negative pressure collecting drums 5 for composite.

[0027] Specifically, the unwinding machine 4 in the collection and compounding component transports two non-woven fabrics from both ends respectively, and the two non-woven fabrics are fed as surface layer non-woven fabrics along the roller surfaces of two negative pressure collection rollers 5, and one adjacent side between the two negative pressure collection rollers 5 has an adsorption area, and the two non-woven fabrics serve as surface layers to sandwich the mixed fiber web in the middle, and the two surface layer non-woven fabrics and the mixed fiber web complete the compounding work through the gap between the roller surfaces of the two negative pressure collection rollers 5.

[0028] Preferably, it also includes a web-forming machine 6 located downstream of the collecting and compounding component, wherein the two composite surface non-woven fabrics and the mixed fiber web are transferred to the web-forming machine 6 for web-forming to form a water-absorbent core composite non-woven fabric.

[0029] Specifically, the web forming machine 6 is used to receive the two composite surface non-woven fabrics and the mixed fiber web to form a water-absorbent core composite non-woven fabric.

[0030] like Figure 3 As shown, the meltblowing device 1 also includes a meltblowing machine 1-2 and a cold air system 1-3, wherein the cold air system 1-3 is respectively installed on both sides of the meltblowing machine 1-2, and is used for cooling and molding the meltblown material after it is melted at high temperature.

[0031] like Figure 4 As shown, the cotton making device 3 also includes a feeding roller 3-2, an opener 3-3 and a cotton sprayer 3-4, wherein the cotton sprayer 3-4 is provided with a fan 3-5 for spraying short-fiber cotton.

[0032] like Figure 5 As shown, the feeding device 2 also includes a hopper 2-2, a material refiner 2-3 and a transmission device 2-4.

[0033] Specifically, after the meltblown material is melted by the meltblowing machine 1-2, it is sprayed out from the meltblowing head 1-1 by hot air drawing, and the sprayed meltblown material is cooled and formed by the cold air system 1-3. The cotton making device 3 feeds cotton, chemical fiber cotton and other raw materials into the opener 3-3, and the short fibers supported by the opener 3-3 are broken up and transported to the cotton spraying machine 3-4. The built-in fan 3-5 in the cotton spraying machine 3-4 can further break up the short fibers, and the short fiber cotton is quantitatively and evenly transported from the cotton spraying port. The feeding device 2 can evenly transport the highly absorbent resin from the discharge port 2-1. Finally, the meltblown fibers, short fiber cotton and highly absorbent resin are mixed under the meltblowing device 1 to form a mixed fiber web.

[0034] The present application also discloses a method for producing a water-absorbent core composite nonwoven fabric, comprising the following steps:

[0035] S1. Pre-set the working parameters of the meltblowing device 1, the cotton making device 3 and the feeding device 2;

[0036] S2. Activate the meltblown device 1, the cotton-making device 3, and the feeding device 2 to spray meltblown fibers, staple cotton, and superabsorbent resin respectively. Among them, the staple cotton and the superabsorbent resin are sprayed from both sides of the meltblown fibers to mix the meltblown fibers, staple cotton, and superabsorbent resin to form a mixed fiber web.

[0037] S3. The formed mixed fiber web gradually falls and is sandwiched between two layers of surface non-woven fabrics, and then a net is formed to obtain the required composite non-woven fabric.

[0038] Preferably, in step S3, the two layers of surface non-woven fabrics are respectively fed into the roller surfaces of the two negative pressure collecting rollers 5 in the composite assembly, and the negative pressure is used to draw the mixed fiber web to converge with the two layers of surface non-woven fabrics in the roller surface gap of the two negative pressure collecting rollers 5 for composite.

[0039] Preferably, in step S3, the two composite layers of surface non-woven fabrics and the mixed fiber web are transferred to the web-forming machine 6, and the absorbent core composite non-woven fabric is formed by the web-forming machine 6.

[0040] Specifically, in the working process of this application: A production line and production method for an absorbent core composite non-woven fabric of this application, refer to Figure 1 and Figure 2 , first set the working parameters of the meltblown device 1, the cotton-making device 3, and the feeding device 2, then activate the meltblown device 1, the cotton-making device 3, and the feeding device 2. After the meltblown material is melted at high temperature, the meltblown fibers are sprayed from the meltblown nozzle 1-1 of the meltblown device 1 by hot air drawing, and are cooled and formed by the cold air system 1-3. At the same time, the staple cotton made by the cotton-making device 3 and the superabsorbent resin conveyed by the feeding device 2 are mixed among the meltblown fibers, staple cotton, and superabsorbent resin to form a mixed fiber web. The formed fiber web falls onto the two negative pressure collecting rollers 5 and is sandwiched between two layers of surface non-woven fabrics conveyed by the unwinder 4. Subsequently, the two layers of surface non-woven fabrics and the fiber web enter the web-forming machine 6, and finally the absorbent core composite non-woven fabric is formed.

[0041] The above-described embodiments are only the preferred embodiments of this application, and do not impose any form of limitation on this application. Any person skilled in the art, without departing from the scope of the technical solution of this application, makes more possible changes, modifications, or revisions to the technical solution of this application by using the disclosed technical content, which are all equivalent embodiments of this application. Therefore, all equivalent changes made according to the idea of this application without departing from the content of the technical solution of this application should be covered by the protection scope of this application.

Claims

1. A production line for a water-absorbent core composite non-woven fabric, characterized in that: It includes a meltblowing device (1) for ejecting meltblown fibers, a cotton-making device (3) for ejecting staple cotton, and a feeding device (2) for ejecting superabsorbent resin. Among them, the cotton outlet (3-1) of the cotton-making device (3) and the discharge outlet (2-1) of the feeding device (2) are respectively arranged adjacent to the left and right sides of the meltblowing head (1-1) of the meltblowing device (1), so that the ejected meltblown fibers, staple cotton and superabsorbent resin are mixed to form a mixed fiber web, and the mixed fiber web is sandwiched between two preset surface layer non-woven fabrics and formed into a composite non-woven fabric by forming a web; It further includes a collection and composite assembly downstream of the meltblowing device (1). Among them, the collection and composite assembly consists of two adjacent negative pressure collection drums (5) and two unwinding machines (4). The two unwinding machines (4) are respectively used to feed two surface layer non-woven fabrics along the roller surfaces of the two negative pressure collection drums (5), and the two surface layer non-woven fabrics and the mixed fiber web converge in the gap between the roller surfaces of the two negative pressure collection drums (5) for composite; The cotton-making device (3) further includes a feeding roller (3-2), a carding machine (3-3) and a cotton spraying machine (3-4). Among them, a fan (3-5) for ejecting staple cotton is provided in the cotton spraying machine (3-4).

2. The production line of a water-absorbent core composite non-woven fabric according to claim 1, characterized in that: It further includes a web-forming machine (6) downstream of the collection and composite assembly. Among them, the two composite surface layer non-woven fabrics and the mixed fiber web are transferred to the web-forming machine (6) to form a water-absorbing core composite non-woven fabric by forming a web.

3. The production line of a water-absorbent core composite non-woven fabric according to claim 1, characterized in that: The meltblowing device (1) further includes a meltblowing machine (1-2) and a cold air system (1-3). Among them, the cold air system (1-3) is respectively installed on both sides of the meltblowing machine (1-2) for cooling and forming after the meltblown material is melted at a high temperature.

4. A production line for a water-absorbent core composite non-woven fabric according to claim 1, characterized in that: The feeding device (2) further includes a hopper (2-2), a material leveling machine (2-3) and a transmission device (2-4).

5. A production method of a water-absorbent core composite non-woven fabric as described in any one of claims 1-4, characterized in that, It includes the following steps: S1. Preset the working parameters of the meltblowing device (1), the cotton-making device (3) and the feeding device (2); S2. Enable the meltblowing device (1), the cotton-making device (3) and the feeding device (2) to eject meltblown fibers, staple cotton and superabsorbent resin respectively. Among them, the staple cotton and the superabsorbent resin are ejected from both sides of the meltblown fibers so that the meltblown fibers, staple cotton and superabsorbent resin are mixed to form a mixed fiber web; S3. The formed mixed fiber web gradually falls and is sandwiched between two surface layer non-woven fabrics, and then a web is formed to obtain the required composite non-woven fabric.

6. The production method of a water-absorbent core composite non-woven fabric according to claim 5, characterized in that, In step S3, the two surface layer non-woven fabrics are respectively fed along the roller surfaces of the two negative pressure collection drums (5) in the collection and composite assembly as described in claim 2, and the mixed fiber web is pulled by the negative pressure action to converge with the two surface layer non-woven fabrics in the gap between the roller surfaces of the two negative pressure collection drums (5) for composite.

7. The production method of a water-absorbent core composite non-woven fabric according to claim 5, characterized in that, In step S3, the two composite surface layer non-woven fabrics and the mixed fiber web are transferred to the web-forming machine (6) as described in claim 3, and a water-absorbing core composite non-woven fabric is formed by using the web-forming machine (6).

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