Preparation device applied to water-repellent non-woven fabric

Abstract

The utility model discloses a preparation device applied to a water-repellent non-woven fabric, which relates to the technical field of non-woven fabric preparation and comprises a first spunbond line, a melt-blown line, a second spunbond line, a web forming curtain and a hot mill, the melt-blowing line comprises a blender, a screw extruder and a melt-blowing spinning machine head; the material mixer comprises a material mixing tank, a main shaft is arranged in the material mixing tank, a material lifting thread is arranged on the main shaft, and stirring blades are arranged on the main shaft; an ultrasonic vibrator is arranged on the lower side of the mixing tank; the SMS spunbond melt-blown composite non-woven fabric is prepared by mixing materials by adopting an improved mixer and then matching with the first spunbond line, the melt-blown line and the second spunbond line, and the prepared non-woven fabric does not need to be subjected to hot pressing of a hard water-repellent material layer, so that the prepared non-woven fabric is ensured to be sufficiently soft while meeting the water-repellent requirement; the material is very suitable for hygienic product materials such as paper diapers and sanitary towels.

Description

Technical Field

[0001] The utility model relates to the technical field of non-woven fabric preparation, in particular to a preparation device for water-repellent non-woven fabric. Background Art

[0002] The current water-repellent non-woven fabrics are mainly made by placing water-repellent materials between two layers of anti-adhesive fibers, and then bonding them by heat pressing. The water-repellent non-woven fabrics produced by this process are relatively hard and have poor skin affinity, especially when used in sanitary products such as diapers and sanitary napkins, which are less comfortable to use. In response to this situation, some manufacturers have achieved the water-repellent effect by mixing water-repellent masterbatches into the raw materials, but in practice, the water repellency of the non-woven fabrics prepared in this way is not stable enough. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a preparation device for water-repellent nonwoven fabrics.

[0004] The technical solution adopted by the utility model to solve its technical problems is: to provide a preparation device for water-repellent non-woven fabrics, including a first spunbond line, a meltblown line, a second spunbond line, a mesh curtain, and a hot rolling mill; the meltblown line includes a mixer, a screw extruder and a meltblown spinning head; the mixer includes a mixing tank, a main shaft is arranged in the mixing tank, the main shaft has a material lifting thread, and the main shaft is provided with a stirring blade; an ultrasonic vibrator is arranged on the lower side of the mixing tank.

[0005] According to the preparation device provided by the utility model, an SMS spunbond meltblown composite non-woven fabric is prepared by mixing the materials with an improved mixer and then combining the first spunbond line, the meltblown line and the second spunbond line, which has at least the following technical effects: the prepared non-woven fabric does not require a hot-pressed hard water-repellent material layer, ensuring that the prepared non-woven fabric is soft enough while meeting the water-repellent requirements, and is very suitable for sanitary products such as diapers and sanitary napkins.

[0006] As some preferred embodiments of the present invention, the stirring blade has a blade.

[0007] As some preferred embodiments of the utility model, a screw machine input pipe and a primary screen are arranged between the output side of the mixer and the input side of the screw extruder.

[0008] As some preferred embodiments of the utility model, an extrusion screw is arranged in the screw extruder, and the extrusion screw has an extrusion thread. The extrusion thread includes a hot melt section and a pressurizing section, and the extrusion thread gap width of the hot melt section is greater than the extrusion thread gap of the pressurizing section.

[0009] As some preferred embodiments of the utility model, an external scraper strip is provided on the pressurizing section.

[0010] As some preferred embodiments of the present invention, a filter is provided on the output side of the screw extruder.

[0011] As some preferred embodiments of the present utility model, a metering pump is provided on the output side of the screw extruder.

[0012] As some preferred embodiments of the utility model, a meltblowing die head is arranged in the meltblowing spinning head, and the meltblowing die head includes a spinneret, a hot air channel, and a cold air channel. A melt channel is arranged in the meltblowing die head and is connected to the output side of the screw extruder, the hot air channel is externally connected to a hot air pipe, and the cold air channel is externally connected to a cold air pipe.

[0013] As some preferred embodiments of the utility model, the meltblowing die head includes a meltblowing template, a heating template, and a cooling template in sequence. The melt channel and the spinneret are located in the meltblowing template. The hot air channel is located in the heating template. A heating tube is provided in the heating template.

[0014] As some preferred embodiments of the present utility model, a sprayer is provided on the cold air channel.

[0015] The beneficial effects of the utility model are:

[0016] 1. The mixer mixes the raw materials and functional masterbatch together, so that the melt-blown layer prepared by the melt-blown line has a reliable water-repellent effect. The non-woven fabric does not need to be hot-pressed with a layer of hard water-repellent material. It is soft enough while meeting the water-repellent requirements;

[0017] 2. The raw materials and functional masterbatch are quantitatively put into the mixing tank respectively, and the main shaft drives the lifting screw and the stirring blade to rotate. The stirring blade stirs the mixing tank, and the lifting screw continuously brings the material in the middle of the lower side of the mixing tank to the upper side. At the same time, the material around the lower side of the mixing tank is supplemented to the middle, so as to ensure that the material is fully mixed, and the ultrasonic vibrator continuously emits vibration waves to avoid the material on the lower side of the mixing tank or between the material and the mixing tank from being compacted, causing waste and affecting the accuracy of the mixing ingredients;

[0018] 3. The preparation device first lays a spunbond layer, then a meltblown layer, and finally a spunbond layer, and then transports it to the hot rolling mill through the mesh curtain. The hot rolling mill composites the above three layers together through a hot rolling bonding process to obtain SMS spunbond meltblown composite non-woven fabric. The prepared non-woven fabric is soft enough and is very suitable for sanitary products such as diapers and sanitary napkins.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the meltblown line in the utility model;

[0023] Figure 3 It is a structural schematic diagram of the screw extruder in the utility model;

[0024] Figure 4 It is a structural schematic diagram of the melt-blown spinning head in the utility model.

[0025] Reference numerals:

[0026] Spunbond line 100, first spunbond line 110, second spunbond line 120, feeding device 130, spinning box 140, bellows 150, lower thread puller 160, upper thread puller 170; meltblown line 200, screw machine input pipe 210, filter 220, metering pump 230, hot air pipe 240, cold air pipe 250; mixer 300, mixing tank 310, main shaft 320, lifting screw 321, stirring blade 330, ultrasonic vibrator 340; screw extruder 4 00, extrusion screw 410, hot melt section 420, pressurizing section 430, external scraper 431; meltblowing spinning head 500, meltblowing die head 510, meltblowing template 520, melt channel 521, spinneret 522, heating template 530, hot air channel 531, heating tube 532, cooling template 540, cold air channel 541, sprayer 550; mesh curtain 600; hot rolling mill 700; shaping machine 800, winding machine 810, cloth placing machine 820, slitting machine 830. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present utility model, the meaning of "a plurality" is more than two, and "greater than", "less than", "exceed" etc. are understood to exclude the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model, referring to Figure 1 One embodiment of the utility model provides a preparation device for water-repellent non-woven fabrics, which is used for preparing non-woven fabrics.

[0032] Furthermore, the preparation device of the utility model includes a first spunbond line 110, a meltblown line 200, a second spunbond line 120, a mesh curtain 600, and a hot rolling mill 700. That is, the preparation device of the utility model adopts the SMS spunbond meltblown composite process to prepare non-woven fabrics. The first spunbond line 110 and the second spunbond line 120 are used as spunbond lines 100 to prepare spunbond fabrics as the spunbond layer of the non-woven fabric through the spunbond process. The meltblown line 200 is responsible for preparing the meltblown layer of the non-woven fabric.

[0033] Further, refer to Figure 2 The melt-blown line 200 includes a mixer 300, a screw extruder 400 and a melt-blown spinning head 500. The mixer 300 is used to mix the raw materials and the functional masterbatch together, wherein the functional masterbatch is used to increase the modification and realize the water repellency effect of the non-woven fabric. The mixed material is sent to the screw extruder 400 to form a melt, and the melt is subjected to the spinning process in the melt-blown spinning head 500.

[0034] Furthermore, the mixer 300 includes a mixing tank 310. A main shaft 320 is provided in the mixing tank 310, and a material lifting thread 321 is provided on the main shaft 320, that is, when the main shaft 320 rotates, the material lifting thread 321 is driven to rotate, and is used to drive the material in the middle of the lower side of the mixing tank 310 to the upper side position to prevent the material from sinking to the bottom. A stirring blade 330 is provided on the main shaft 320, which is used to stir the material in the mixing tank 310.

[0035] Furthermore, an ultrasonic vibrator 340 is disposed at the lower side of the mixing tank 310 , and the ultrasonic vibrator 340 emits vibration waves to prevent the material at the lower side of the mixing tank 310 from being compacted.

[0036] In actual operation, the raw materials and functional masterbatch are quantitatively put into the mixing tank 310, and the main shaft 320 drives the material lifting screw 321 and the stirring blade 330 to rotate. The stirring blade 330 stirs the mixing tank 310, and the material lifting screw 321 continuously brings the material in the middle of the lower side of the mixing tank 310 to the upper side. At the same time, the material around the lower side of the mixing tank 310 is supplemented to the middle, so as to ensure that the material is fully mixed. The ultrasonic vibrator 340 continuously emits vibration waves to prevent the material on the lower side of the mixing tank 310 or between the material and the mixing tank 310 from being compacted, causing waste and affecting the accuracy of the mixed ingredients.

[0037] Reference Figure 1 The first spunbond line 110 is subjected to a spunbond process to obtain a first spunbond layer (S), the meltblown line 200 is subjected to a meltblown process to cover the second meltblown layer (M) on the first spunbond layer, and the meltblown layer is covered with the third spunbond layer (S), that is, a spunbond layer is first laid on the mesh curtain 600, then a meltblown layer is laid, and finally a spunbond layer is laid, and then it is transported to the hot rolling mill 700 through the mesh curtain, and the hot rolling mill 700 compounds the above three layers together through a hot rolling bonding process to obtain an SMS spunbond meltblown composite non-woven fabric.

[0038] In the above process, since the mixer 300 mixes the raw materials and the functional masterbatch together, the meltblown layer prepared by the meltblown line 200 already has a reliable water repellency effect. In this way, there is no need to hot-press a layer of hard water repellent material, and the prepared SMS non-woven fabric meets the water repellency requirements while being soft enough, and is very suitable for sanitary products such as diapers and sanitary napkins.

[0039] In some embodiments, the stirring blade 330 has a blade, so that the stirring blade 330 can help break up the materials when rotating.

[0040] In some embodiments, a screw machine input pipe 210 and a primary screen are provided between the output side of the mixer 300 and the input side of the screw extruder 400, so that the mixed material output from the mixer 300 passes through the primary screen to ensure that the material entering the screw extruder 400 is fine enough.

[0041] Some embodiments, see Figure 2 , Figure 3 The screw extruder 400 is provided with an extrusion screw 410, which has an extrusion thread. The extrusion thread includes a hot melt section 420 and a pressurizing section 430, and the extrusion thread gap width of the hot melt section 420 is greater than the extrusion thread gap of the pressurizing section 430, so as to realize extrusion exhaust of the material and ensure that the prepared melt is fine enough.

[0042] Some embodiments, see Figure 3 The pressurizing section 430 is provided with an external scraper 431 for scraping the inner wall of the screw extruder 400 and preventing the material from flowing back along the gap between the extrusion thread and the inner wall of the screw extruder 400, thereby ensuring the extrusion effect.

[0043] In some embodiments, a filter 220 is provided at the output side of the screw extruder 400 to ensure that the output melt is fine enough.

[0044] In some embodiments, a metering pump 230 is provided on the output side of the screw extruder 400 to precisely control the output melt flow rate.

[0045] Some embodiments, see Figure 2 , Figure 4 , a melt-blowing die head 510 is arranged in the melt-blowing spinning head 500, and the melt-blowing die head 510 includes a spinneret 522, a hot air channel 531, and a cold air channel 541. A melt channel 521 is arranged in the melt-blowing die head 510 and is connected to the output side of the screw extruder 400, and the hot air channel 531 is externally connected to the hot air pipe 240, and the cold air channel 541 is externally connected to the cold air pipe 250. The melt flows into the melt-blowing die head 510 in the melt-blowing spinning head 500, and flows into the melt channel 521, and flows to the spinneret hole outlet of the spinneret 522 at the lower side of the melt channel 521. At this time, the hot air pipe 240 transports hot air to the hot air channel 531, and the hot air flows out from the air outlet of the hot air channel 531 and pulls the melt thin stream at the spinneret hole outlet at the lower side of the melt channel 521, so that the melt thin stream moves downward and stretches to form melt-blown filaments. At this time, the cold air pipe 250 transports cold air to the cold air channel 541. When the cold air approaches the air outlet of the cold air channel 541, when the meltblown filaments move to the air outlet of the cold air channel 541, the cold air flowing out from the air outlet of the cold air channel 541 contacts the meltblown filaments, causing the meltblown filaments to cool down and condense.

[0046] Some embodiments, see Figure 4The meltblowing die head 510 includes a meltblowing template 520, a heating template 530, and a cooling template 540 in sequence. The melt channel 521 and the spinneret 522 are located in the meltblowing template 520. The hot air channel 531 is located in the heating template 530. The heating template 530 is provided with a heating pipe 532. The cold air channel 541 is located in the cooling template 540. The meltblowing die head 510 is divided into the meltblowing template 520, the heating template 530, and the cooling template 540 in the above manner, so that the installation and disassembly of the meltblowing die head 510 are more convenient and quick.

[0047] In some embodiments, a sprayer 550 is provided on the cold air channel 541 to generate water mist to improve the cooling effect.

[0048] Some embodiments, see Figure 1 The spunbond line 100 includes a feeding device 130, a spinning box 140, a bellows 150, a lower thread puller 160, and an upper thread puller 170. The spinning box 140 receives the material from the feeding device 130 and extrude the spun yarn. Under the cooperation of the wind supply of the bellows 150, the spun yarn is sequentially delivered to the net curtain 600 through the lower thread puller 160 and the upper thread puller 170 to be laid into a spunbond layer.

[0049] In some embodiments, the preparation device of the utility model further comprises a shaping machine 800, which cooperates with the hot rolling mill 700 to perform preliminary shaping after hot rolling.

[0050] In some embodiments, the preparation device of the present invention further comprises a winding machine 810 for winding the shaped non-woven fabric into a roll.

[0051] In some embodiments, the preparation device of the present invention further comprises a cloth placing machine 820 for arranging the rolled nonwoven fabrics.

[0052] In some embodiments, the preparation device of the present invention further comprises a slitting machine 830 for slitting the rolled nonwoven fabric into pieces according to a preset length.

[0053] In the description of this specification, the description with reference to the terms "some embodiments" or "it is conceivable that" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A preparation device for a water-repellent nonwoven fabric, comprising a first spunbond line (110), a meltblown line (200), a second spunbond line (120), a web curtain (600), and a hot rolling mill (700), characterized in that: The melt-blowing line (200) comprises a mixer (300), a screw extruder (400) and a melt-blowing spinning head (500); The mixer (300) comprises a mixing tank (310), a main shaft (320) is arranged in the mixing tank (310), a material lifting thread (321) is arranged on the main shaft (320), and a stirring blade (330) is arranged on the main shaft (320); An ultrasonic vibrator (340) is disposed at the lower side of the mixing tank (310).

2. The device for preparing water-repellent nonwoven fabric according to claim 1, characterized in that: The stirring blade (330) has a blade.

3. The device for preparing water-repellent nonwoven fabric according to claim 1, characterized in that: A screw machine input pipe (210) and a primary screen are provided between the output side of the mixer (300) and the input side of the screw extruder (400).

4. The device for preparing water-repellent nonwoven fabric according to claim 1, characterized in that: The screw extruder (400) is provided with an extrusion screw (410), wherein the extrusion screw (410) has an extrusion thread, wherein the extrusion thread includes a hot melt section (420) and a pressurizing section (430), and the extrusion thread gap width of the hot melt section (420) is greater than the extrusion thread gap of the pressurizing section (430).

5. The device for preparing water-repellent nonwoven fabric according to claim 4, characterized in that: The pressurizing section (430) is provided with an external scraper strip (431).

6. The device for preparing water-repellent nonwoven fabric according to claim 1, characterized in that: A filter (220) is provided on the output side of the screw extruder (400).

7. The device for preparing water-repellent nonwoven fabric according to claim 1, characterized in that: A metering pump (230) is provided on the output side of the screw extruder (400).

8. The device for preparing water-repellent nonwoven fabric according to claim 1, characterized in that: A meltblowing die head (510) is arranged in the meltblowing spinning head (500), and the meltblowing die head (510) includes a spinneret (522), a hot air channel (531), and a cold air channel (541). A melt channel (521) is arranged in the meltblowing die head (510) and is connected to the output side of the screw extruder (400). The hot air channel (531) is externally connected to a hot air pipe (240), and the cold air channel (541) is externally connected to a cold air pipe (250).

9. The device for preparing water-repellent nonwoven fabric according to claim 8, characterized in that: The meltblowing die head (510) includes a meltblowing template (520), a heating template (530), and a cooling template (540) in sequence. The melt channel (521) and the spinneret (522) are located in the meltblowing template (520). The hot air channel (531) is located in the heating template (530). A heating tube (532) is provided in the heating template (530). The cold air channel (541) is located in the cooling template (540).

10. The device for preparing water-repellent nonwoven fabric according to claim 8, characterized in that: The cold air channel (541) is provided with a sprayer (550).

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