JP2018001714A - Laminated nonwoven fabric manufacturing apparatus and manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable, when manufacturing a nonwoven fabric having a structure where a reinforcing substrate and short fiber webs are lamination-integrated, a laminated nonwoven fabric having high quality to be obtained without causing disarrangement and wrinkles in the short fiber webs.SOLUTION: Provided is a laminated nonwoven fabric manufacturing apparatus comprising: a high pressure liquid flow processing unit 9; and a transport device 7 for transporting a laminated body 8 to the high pressure liquid flow processing unit. The transport device 7 has a configuration where a plurality of traveling belts are arranged along the transport direction of the laminate 8. The manufacturing apparatus comprises: a first traveling belt 10a having a first winding roller 11a at an end position of the travel path; a second traveling belt 10b having a second winding roller 11b arranged at a starting end position of the traveling path adjacent to the first winding roller 11a; and a pressing device 16 that presses the laminate 8 to the traveling belt side at a position 12 or in the vicinity thereof where the laminate 8 is delivered from the first traveling belt 10a to the second traveling belt 10b.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a laminated nonwoven fabric manufacturing apparatus and manufacturing method, and in particular, a laminated nonwoven fabric for forming an integral nonwoven fabric by entanglement processing after sandwiching a sheet-like reinforcing support in a form-retaining state between a pair of front and back webs. The present invention relates to a nonwoven fabric manufacturing apparatus and manufacturing method.

  A laminated nonwoven fabric is known in which a net-like reinforcing support made of a thermoplastic resin and a short fiber web are laminated, and the fibers are entangled by a high-pressure liquid flow so that the whole is integrated. For example, Patent Document 1 includes a flexible net-like reinforced support layer whose bending resistance is improved by controlling the composition ratio and basis weight of the constituent layers in a uniaxially oriented body composed of a net-like reinforced support. A laminated nonwoven fabric in which a cellulose fiber web is entangled with this support layer by a spunlace method is described.

  However, in the manufacturing apparatus for obtaining the laminated nonwoven fabric of Patent Document 1, the distance from the feeding device for feeding the net-like reinforced support from the roll to the treatment device with the high-pressure liquid flow in the hydroentanglement device is long. That is, the feeding device becomes the first nip point and the high-pressure liquid flow treatment device becomes the second nip point, but the distance from the first nip point to the second nip point is long. For this reason, all the tension acting on the material during the process is applied to the net-like reinforcing support. As a result, there is a problem in that the short fiber web laminated on the reinforcing support causes disturbances and wrinkles to deteriorate the quality of the obtained laminated nonwoven fabric.

JP 2015-77764 A

  The present invention obtains a laminated nonwoven fabric having a high grade without producing disturbances and wrinkles in the short fiber web when producing a nonwoven fabric having a structure in which the reinforcing support and the short fiber web are laminated and integrated. The purpose is to be able to.

In order to achieve this object, a production apparatus for producing a laminated nonwoven fabric in which the reinforcing support and the short fiber web of the present invention are laminated and integrated by entanglement of short fibers,
A high-pressure liquid flow treatment apparatus for applying a high-pressure liquid flow for entanglement treatment to a laminate of a reinforced support and a short fiber web;
A conveying device having a structure in which an endless traveling belt for conveyance is wound around a winding roller for conveying the laminate to a high-pressure liquid flow treatment device;
The transport device has a configuration in which a plurality of traveling belts are installed along the transport direction of the laminate,
The manufacturing apparatus includes:
A first traveling belt provided with a first winding roller at the end position of the traveling path;
A second traveling belt in which a second winding roller disposed adjacent to the first winding roller is provided at a start position of the traveling path;
And a pressing device that presses the laminated body toward the traveling belt at or near a position where the laminated body is delivered from the first traveling belt toward the second traveling belt.

  According to the laminated nonwoven fabric manufacturing apparatus of the present invention, it is preferable that the pressing device is a pressing roller.

The method for producing the laminated nonwoven fabric of the present invention comprises:
When manufacturing a laminated nonwoven fabric in which a reinforcing support and a short fiber web are laminated and integrated by entanglement of short fibers,
Winding an endless traveling belt for transporting the laminated body toward the high-pressure liquid flow treatment device for applying a high-pressure liquid flow for entanglement treatment to the laminated body of the reinforcing support and the short fiber web A conveying device having a structure wound around a hanging roller, using a conveying device in which a plurality of traveling belts are installed along the conveying direction of the laminate,
A second winding roller disposed adjacent to the first winding roller from the first traveling belt provided with the first winding roller at the end position of the traveling path in the conveying device is a traveling path. When the laminated body is delivered toward the second traveling belt provided at the starting end position, the laminated body is pressed to the traveling belt side.

  According to the method for manufacturing a laminated nonwoven fabric of the present invention, it is preferable to press the laminated body toward the traveling belt by a pressing roller.

  According to the laminated nonwoven fabric manufacturing apparatus of the present invention, it has a pressing device that presses the laminated body toward the traveling belt at or near the position where the laminated body is delivered from the first traveling belt toward the second traveling belt. However, the reason is not clear, but as a phenomenon, it is possible to reliably prevent the short fiber web laminated on the reinforcing support from being disturbed or wrinkled. For this reason, a high-quality laminated nonwoven fabric can be obtained.

It is a figure for demonstrating the advantage of the manufacturing apparatus of the laminated nonwoven fabric of embodiment of this invention.

  The laminated nonwoven fabric manufacturing apparatus shown in FIG. 1 is a laminate of a composite structure in which short fiber webs 2a and 2b are laminated on both front and back sides of a reinforced support 1, and these are integrated by entanglement of short fibers. This is for producing the nonwoven fabric 3. The illustrated manufacturing apparatus includes a card machine 4a capable of producing and feeding one short fiber web 2a, a feeding device 6 capable of feeding a sheet-like reinforcing support 1 from a roll 5, and the other short fiber web. 2b and another card machine 4b capable of producing and sending it out.

  The reinforced support 1 constituting the laminated nonwoven fabric 3 is for imparting the required mechanical strength to the laminated nonwoven fabric 3, and is a net-like body, a nonwoven fabric, a knitted product, or a water-permeable, for example, hole A perforated water-insoluble paper material or a paper material made of cellulose pulp fiber can be used to form a net or other forms. The reinforced support 1 has better shape retention than the short fiber webs 2a and 2b, and is less deformable to tension than the short fiber web and is difficult to stretch. Among these, the first and second adhesions are made so that the alignment axis intersects a uniaxially oriented body including a thermoplastic resin layer and a first adhesive layer and a second adhesive layer having a melting point lower than that of the thermoplastic resin layer. A network-like reinforced support layer that is layered through layers can be preferably used. Examples of such a reinforcing support layer include those described in JP-A-2015-78473. More specifically, for example, a fiber orthogonal laminated nonwoven fabric (trade names “Wariff”, “Craft”) manufactured by JXANCI can be used.

The reinforced support 1 preferably has a basis weight of 10 to 20 g / m ² . By being within this range, the short fibers of the short fiber webs 2a and 2b described above are entangled by a high-pressure water flow process described later, and the reinforcing support 1 and the short fiber webs 2a and 2b are integrated to form a laminated structure. When the nonwoven fabric 3 is obtained, the laminated nonwoven fabric 8 can be designed from a minimum basis weight of 45 g / m ² . And, by this, it is possible to obtain a low-weight nonwoven fabric with improved mechanical strength, stiffness of the nonwoven fabric, “warping” when used as a wiper, etc., compared to a hydroentangled nonwoven fabric composed only of short fibers Become. The upper limit of the basis weight of the reinforced support 1 is preferably 20 g / m ² as described above. When the basis weight of the reinforced support 1 exceeds 20 g / m ² , the short fiber is reinforced by the high-pressure water flow treatment. It becomes difficult to entangle with.

  The constituent fibers of the short fiber webs 2a and 2b constituting the laminated nonwoven fabric 3 are not particularly limited, but natural fibers such as cotton fibers and synthetic fibers such as polyester fibers, polyolefin fibers and polyamide fibers are preferably used. be able to. The short fiber webs 2a and 2b may be mixed cotton webs in which two or more kinds of fibers having different materials are mixed.

  Examples of the short fiber webs 2a and 2b include normal card webs and airlaid webs. Further, it may be a parallel web in which fibers are arranged in a specific direction, or may be a random web having no orientation in the arrangement.

  In the laminated nonwoven fabric 3, the short fiber webs 2a and 2b laminated on one surface and the other surface of the reinforcing support 1 have a basis weight ratio of (short fiber web 2a basis weight) / (short fiber web 2b The weight per unit area) is preferably 0.23 to 1.00. By setting such a ratio, a part of the reinforcing support 1 is likely to appear on the surface of the laminated nonwoven fabric 3 on the side of the low-weight short fiber web 2a, and as a result, when the laminated nonwoven fabric 3 is used as a wiping cloth. It is possible to improve the scraping removal property of dirt and the like.

Layered nonwoven fabric 3 preferably has a basis weight is 45~150g / ^{m 2.} And the required performance based on the use of the laminated nonwoven fabric 3 can be satisfy | filled by selecting suitably the ratio of the fabric weight of the reinforced support body 1, the fabric weight of the short fiber web 2a, and the fabric weight of the short fiber web 2b.

  In FIG. 1, reference numeral 7 denotes a conveying device, which is composed of a short fiber web 2 a, 2 b fed out from a card machine 4 a, 4 b and a reinforcing support 1 fed out from a roll 5. After laminating | stacking the support body 1 and the short fiber web 2b in order, the laminated body 8 is conveyed toward the high pressure water flow processing apparatus 9 as a high pressure liquid flow processing apparatus. The conveying device 7 has a configuration in which an endless traveling belt for conveyance is wound around a winding roller. In the illustrated conveying device 7, a plurality of traveling belts, that is, a first traveling belt 10 a and a second traveling belt 10 b are installed along the conveying direction of the laminated body 8. The endless first traveling belt 10a is provided with a pair at the start end position and the end position of the travel route, but the one at the start end position is wound around the first winding roller 11a (not shown). ing. The endless second traveling belt 10b is wound around a pair of second winding rollers 11b and 11b provided at the start end position and the end position of the travel path. Reference numeral 12 denotes a position where the laminate 8 is delivered from the end position of the travel path of the first travel belt 10a toward the start end position of the travel path of the second travel belt 10b. In the illustrated example, the first traveling belt 10a travels on a horizontal route, and the second traveling belt 10b travels on a route having an ascending slope.

  The high-pressure water flow treatment device 9 is provided with a pair of endless sandwiching belts 13a and 13b that transport the belt-shaped laminate 8 sent from the transport device 7 while sandwiching and supporting it from both the front and back surfaces. These sandwiching belts 13a and 13b are configured by a net body, a perforated body, or the like so that a high-pressure water flow for entangling the short fiber webs 2a and 2b can pass therethrough. 14 is an injection device for high-pressure water flow, and the structure of the short fiber webs 2a and 2b in the laminated body 8 is obtained by injecting the high-pressure water flow 15 onto the laminated body 8 that is conveyed while being sandwiched between the sandwiching belts 13a and 13b. It is for performing the entanglement process on the fiber. By performing the entanglement treatment, the constituent fibers of the short fiber webs 2a and 2b are entangled with each other to form a nonwoven fabric, and the constituent fibers of the short fiber webs 2a and 2b are entangled with the reinforcing support 1. As a result, the laminated nonwoven fabric 3 that is laminated and integrated is obtained.

  In the laminated nonwoven fabric manufacturing apparatus according to the embodiment of the present invention, as shown in FIG. 1 (a), the position at which the laminated body 8 is delivered from the first traveling belt 10a to the second traveling belt 10b. 12, a pressing device 16 is provided for pressing the laminated body 8 carried on the first and second traveling belts 10a and 10b toward the traveling belts 10a and 10b from above. The pressing device 16 is preferably in the form of a pressing roller as shown. However, other forms such as a pressing plate may be used.

  As shown in the drawing, when the first traveling belt 10a travels on a horizontal route and the second traveling belt 10b travels on a route having an ascending slope, or when traveling on another route, the pressing device If 16 is not installed, as shown in FIG. 1 (b), a part of the upper layer side of the laminate 8 is lifted from the lower layer side, whereby the upper layer side reinforcing support 1 and the short fiber web 2b laminated thereon are moved to the running belt. The lower short fiber web 2a has a different length and wrinkles are generated in the lower short fiber web 2a, thereby obtaining a high-quality laminated nonwoven fabric. It becomes difficult. On the other hand, as shown to Fig.1 (a), by installing the press apparatus 16 and pressing the laminated body 8, generation | occurrence | production of the above lifting and wrinkles can be prevented effectively.

  As described above, the pressing device 16 has a position 12 where the laminated body 8 is transferred from the first traveling belt 10a to the second traveling belt 10b, that is, the first winding roller 11a and the second winding roller. It is most effective to be installed at a position between 11b. However, the present invention is not limited to this, and if the above-described lifting or wrinkle does not occur in the stacked body 8 transported by the transport device 7, it can be placed at an appropriate position, for example, a position in the vicinity of the delivery position 12. There is no problem even if it is installed. That is, in the present invention, the “near position” can be defined as an appropriate position within a range where the pressing effect by the pressing device 16 can be exhibited.

  In the case where the pressing device 16 is in the form of a roller as shown in the figure, this roller can be of a rotationally driven configuration that is not driven. The rotational speed, that is, the rotational peripheral speed, is preferably synchronized with the traveling speed of the traveling belts 10 a and 10 b in the transport device 7. That is, it may be matched with the traveling speed of the traveling belts 10a and 10b, or may be changed within a range of 0.95 to 1.05 with respect to the traveling speed of the traveling belts 10a and 10b. Also good. Specifically, by observing the state of the resulting laminated nonwoven fabric 3 and appropriately adjusting the rotational speed of the roller, the above-described laminated body 8 can be prevented from being lifted and wrinkled, and a high-pressure water flow treatment device. The generation of “wrinkles” and “turn-ups” in the laminated nonwoven fabric 3 produced using No. 9 can be prevented, and a high-quality laminated nonwoven fabric 3 can be produced. The pressing force to be applied to the laminate 8 is preferably in the range of 1 kg / m to 5 kg / m. If the pressing force is too small, the required pressing effect cannot be obtained. On the other hand, if the pressing force is too large, excessive tension will be applied, so that the tangling between the constituent fibers of the short fiber web that is inferior in form retention will be unraveled, and spotted spots will occur, or it will be partially It will also be destroyed. On the other hand, a reinforced support having excellent form retention is distorted by excessive tension.

  In the case where the pressing device 16 is in the form of a roller, as this roller, a roller whose surface is punched or a surface whose surface is textured can be preferably used.

  The treatment in the high-pressure water flow treatment device 9 is performed as usual. Specifically, as the injection device 14, a plurality of injection ports having a hole diameter of 0.05 to 2.0 mm arranged in one or more rows at intervals of 0.05 to 10 mm can be preferably used. The injection pressure is 1.5 to 20 MPa. The number of high-pressure water flow treatments applied to the laminate 8 is not particularly limited, but the total number of treatments from the short fiber nonwoven web 2a side and the short fiber nonwoven web 2b side is two. It is preferably about 10 times. In addition, it is also possible to process using appropriate liquids other than water.

  After the high-pressure water flow treatment, the desired laminated nonwoven fabric is obtained by drying the moisture as necessary.

Example 1
As the short fiber nonwoven webs on both surfaces, random webs made of cotton fibers with a basis weight of 17 g / m ² were used. As the reinforcing support, crepe paper having a basis weight of 16 g / m ^{2 made} of cellulose pulp fiber was used. The pressing force of the rotationally driven roller as a pressing device is set to 2 kg / m, the rotational peripheral speed is set to 1.00 with respect to the speed of the traveling belt 10a, and the speed of the traveling belt 10b is set to the traveling belt 10a. 0.98 for the speed of Under these setting conditions, the short fiber nonwoven web and the reinforced support were conveyed and subjected to high-pressure liquid flow treatment. When the obtained laminated nonwoven fabric was observed, there was no occurrence of wrinkles on both sides of the laminated nonwoven fabric, and a beautiful surface shape was obtained. The high-pressure liquid flow treatment was a multi-stage treatment in which the pressure was gradually increased at a pressure of 3 MPa, 5.5 MPa, 7 MPa, and 10 MPa.

(Example 2)
Compared with Example 1, as a reinforced support, a fiber orthogonal laminated nonwoven fabric made of slit yarn of polyolefin resin film (trade name “Craft” basis weight 10 g / m ² manufactured by JXANCI) was used. Other than that was carried out similarly to Example 1, and obtained the laminated nonwoven fabric by which the short fiber nonwoven web was laminated | stacked on both surfaces. When the laminated nonwoven fabric obtained in Example 2 was observed, wrinkles and the like were not generated on both surfaces of the laminated nonwoven fabric, and a beautiful surface shape was obtained.

(Comparative Examples 1 and 2)
Compared to Examples 1 and 2, the difference was that no roller as a pressing device was used. Other than that was carried out as Comparative Examples 1 and 2 in the same manner as in Examples 1 and 2. As a result, the reinforced support floated without being placed on the traveling belt in the transport process, and was transported to the high-pressure liquid flow treatment process while being pulled in the machine direction. When the laminated nonwoven fabric obtained after the high-pressure liquid flow treatment was observed, the surface of the short fiber nonwoven web on the side in contact with the conveying belt was wrinkled, and the quality was poor.

DESCRIPTION OF SYMBOLS 1 Reinforcement support body 2a Short fiber web 2b Short fiber web 3 Laminated nonwoven fabric 7 Conveying device 9 High-pressure water flow treatment device 10a First traveling belt 10b Second traveling belt 11a First winding roller 11b Second winding roller 12 Delivered position 16 Pressing device

Claims (4)

A production apparatus for producing a laminated nonwoven fabric in which a reinforcing support and a short fiber web are laminated and integrated by entanglement of short fibers,
A high-pressure liquid flow treatment apparatus for applying a high-pressure liquid flow for entanglement treatment to a laminate of a reinforced support and a short fiber web;
A conveying device having a structure in which an endless traveling belt for conveyance is wound around a winding roller for conveying the laminate to a high-pressure liquid flow treatment device;
The transport device has a configuration in which a plurality of traveling belts are installed along the transport direction of the laminate,
The manufacturing apparatus includes:
A first traveling belt provided with a first winding roller at the end position of the traveling path;
A second traveling belt in which a second winding roller disposed adjacent to the first winding roller is provided at a start position of the traveling path;
An apparatus for producing a laminated nonwoven fabric, further comprising: a pressing device that presses the laminate toward the running belt at or near a position where the laminate is delivered from the first running belt to the second running belt. .   2. The laminated nonwoven fabric manufacturing apparatus according to claim 1, wherein the pressing device is a pressing roller. When manufacturing a laminated nonwoven fabric in which a reinforcing support and a short fiber web are laminated and integrated by entanglement of short fibers,
Winding an endless traveling belt for transporting the laminated body toward the high-pressure liquid flow treatment device for applying a high-pressure liquid flow for entanglement treatment to the laminated body of the reinforcing support and the short fiber web A conveying device having a structure wound around a hanging roller, using a conveying device in which a plurality of traveling belts are installed along the conveying direction of the laminate,
A second winding roller disposed adjacent to the first winding roller from the first traveling belt provided with the first winding roller at the end position of the traveling path in the conveying device is a traveling path. A method for producing a laminated nonwoven fabric, comprising: pressing the laminated body toward the traveling belt when the laminated body is delivered toward the second traveling belt provided at the starting end position. 4. The method for producing a laminated nonwoven fabric according to claim 3, wherein the laminate is pressed against the running belt by a pressing roller.

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