JP4470047B2 - MANUFACTURING METHOD AND MANUFACTURING APPARATUS FOR FURTHOGRAPHIC INTERLAMINATED NONWOVEN - Google Patents

Description

  The present invention relates to a method and an apparatus for manufacturing an orthogonal nonwoven fabric of a filamentous material, and in particular, since the arrangement of the weft group is fixed, there is no disorder in the yarn arrangement form of the orthogonal nonwoven fabric, and the orthogonality is good in productivity. The present invention relates to a nonwoven fabric manufacturing method and a manufacturing apparatus.

  As a structure arranged in the warp and weft, woven fabrics are typical, but the productivity is poor, the structure is not stable in the coarse structure, the warp and weft are deeper than each other, There were problems such as lack of flatness. Accordingly, various orthogonal nonwoven fabrics in which warp yarns and weft yarns are laminated and bonded have been proposed in recent years, particularly in the industrial field (for example, Japanese Patent Publication No. Sho 53-38883 and Japanese Patent Publication No. Sho 50-40185), which occupy a large market. It has become like this. In such warp and weft weft orthogonal means, means for directly laminating the individual wefts constituting the weft group independently has been proposed (for example, Japanese Patent Publication No. 3-57222). However, in this system, the arrangement of the weft groups is not fixed, and therefore, the arrangement of the threads is likely to be disturbed. For this reason, the production speed cannot be increased, and the orthogonal laminating machine has various restrictions. There was also a problem in making a wide device. Therefore, fixing the arrangement of the yarn groups constituting the weft yarn group by an easy means has been an important issue.

As means for fixing the arrangement of the weft groups, means for fixing the arrangement of the weft groups by causing the yarns having adhesiveness to travel between the weft groups in a waveform has been proposed (for example, Japanese Patent Laid-Open No. 48-93767).
However, in this method, when the thread at the edge of the weft web is securely gripped, the corrugated thread protrudes from the weft web, the width of the weft web is not constant, and the line speed of the weft web is increased. There is also a problem that the apex portion of the corrugated wave is rounded and the gripping efficiency between the wefts is poor.

  As another arrangement fixing means for the weft groups, means for fixing the arrangement of the weft groups by hot melt adhesive filaments by centrifugal spinning of the hot melt adhesive has been proposed by the present applicant (for example, Japanese Patent Publication No. 51). -9067). This method is widely used because it is highly productive, can be securely fixed with a small amount of adhesive, and the hot melt adhesive can also be used for joining warp and weft yarns. However, hot melt adhesives have low heat resistance, and in the centrifugal spinning method, there is a process of making the weft group from a cylindrical shape to a flat surface, and the product width of the array of fixed weft groups is not constant. There was also a problem in the appearance of the product that gaps were likely to occur.

  On the other hand, as a nonwoven fabric made of yarn, there is a nonwoven fabric called an oblique nonwoven fabric, not an orthogonal nonwoven fabric. The oblique non-woven fabric is characterized in that the yarn groups run in an oblique direction with respect to the longitudinal direction of the fabric, and the yarn groups running in the oblique direction intersect each other. In this method of manufacturing the cross-woven fabric, yarns guided from individual yarn supply capillaries included in yarn supply guides traversing left and right on a conveyor provided with a number of yarn hooking pins on the left and right at a predetermined pitch in the traveling direction are used. The left and right thread hook pins are alternately hooked to the left and right, and various methods have been proposed by the present applicant (for example, Japanese Patent Publication No. 62-54904, Japanese Patent Publication No. 3-80911, Japanese Patent Laid-Open No. Hei 8). -209518). The present invention is characterized in that the weft group is arranged and fixed by utilizing these oblique nonwoven fabric technologies.

Japanese Examined Patent Publication No. 53-38883 (first page, FIGS. 1 and 2). Japanese Patent Publication No. 50-40185 (first page, FIG. 1). Japanese Examined Patent Publication No. 3-57222 (pages 1-2, 1, 2, 3). JP-A-48-93767 (2nd page, upper left column). Japanese Patent Publication No. 51-9067 (first page, FIG. 1). Japanese Examined Patent Publication No. Sho 62-54904 (first and second pages, first, second and third figures). Japanese Examined Patent Publication No. 3-80911 (page 1-2, FIGS. 1 and 4). JP-A-8-209518 (page 2-3, FIG. 5).

  The present invention has been made in order to eliminate the above-mentioned problems of the background art, and its purpose is to make the arrangement of yarns in an orthogonal non-woven fabric of yarns orderly and improve product appearance and physical properties. There is to be able to do it. Another object is to make it possible to improve the dimensional stability in the oblique direction, which has been a problem with conventional orthogonal nonwoven fabrics, in the present invention. Another object of the present invention is that it is not necessary to use hot melt in the present invention in contrast to the conventional hot melt adhesive filament where the wefts are joined together, so that the heat resistance of the orthogonal nonwoven fabric can be improved. There is. Another object of the present invention is to enable stable and high-quality production at high speed because the arrangement of the yarns constituting the weft web is fixed in the present invention, and to improve productivity. Still another object is to simplify the weft web feeding device and the weft laminator of the weft laminator, and to make it possible to manufacture a wide laminator simply and at a low cost.

  The present invention has been made in order to overcome the problems of the prior art described in the background art, and the characteristics of the manufacturing method of the present invention will be described below. The present invention has a conveyor provided with a large number of yarn hooking pins on the left and right at a predetermined pitch in the traveling direction, and from individual yarn supply capillaries provided in a yarn feeding guide that traverses the conveyor left and right The yarn group is guided, and the guided yarn group is skewed by being alternately hooked on the left and right thread hook pins, and the oblique web is formed by crossing these skewed thread groups. A step of preparing a unidirectional array of a plurality of yarns that are arranged at regular intervals to form a weft group of orthogonal non-woven fabrics of yarns, and a unidirectional array of yarns that form the oblique web and the weft group A process in which a weft web is formed by joining the body, a process of preparing a warp web that becomes the warp of a cross-woven fabric of yarns, and a process in which the warp web and the weft web are warp-orthogonally laminated and joined. Orthogonal non-woven fabric A method for manufacturing. The present invention also relates to a method for producing an orthogonal nonwoven fabric of a filamentous material, wherein at least one of the yarn forming the oblique web and the yarn forming the weft group is an adhesive yarn.

  Moreover, the characteristics as a manufacturing apparatus of this invention are shown below. The present invention has a conveyor provided with a large number of yarn hooking pins on the left and right at a predetermined pitch in the traveling direction, and from the individual yarn supply capillaries provided in the yarn supply guide traversing the conveyor on the left and right A device that guides the yarn group and the guided yarn group are alternately hooked on the left and right thread hook pins to cause the yarn group to skew in a zigzag manner. An apparatus for forming, a weft supply apparatus configured to supply a unidirectional array of a large number of yarns that are arranged at regular intervals to form a weft group of orthogonal nonwoven fabrics of yarns, and the oblique web A joining device in which a unidirectional array of yarns constituting the weft group is joined to form a weft web, a separate vertical web supply device for supplying a vertical web that is a warp orthogonal nonwoven fabric, this vertical web, and this weft With the web And a laminated crosswise device which is background cross-laminated bonding, apparatus for producing orthogonal nonwoven filamentous material.

  The present invention relates to an orthogonal nonwoven fabric of a filamentous material and a manufacturing method thereof. The filamentous material in the present invention refers to yarn in a broad sense, and includes those in the form of multifilament yarn, monofilament, flat yarn (tape yarn or drawn tape), short fiber yarn (spun yarn) and the like. Further, core-sheath type and side-by-side type composite fibers and design yarns are also included. A composite yarn in which different fiber types are combined to form a yarn is also used. Further, fiber bundles called roving, split yarn, and tow can be used by opening them appropriately. The material may be natural fiber, chemical fiber or synthetic fiber, and includes not only organic fiber but also inorganic fiber such as glass fiber and carbon fiber, and metal fiber such as amorphous metal fiber and copper wire. It is. The total tex of the yarn constituting the present invention is desirably in the range of 10 dtex to 100,000 dtex, desirably 30 dtex to 10,000 dtex, and 50 dtex to 3000 dtex. In addition, about the warp web of an orthogonal nonwoven fabric, the nonwoven fabric and the tow widening body can also be used (In that case, the said total tex is not applied). The filaments or fibers that are composed of multifilaments and spun yarns have a number of texes of ordinary number dtex, and fibers ranging from 0.001 dtex called ultrafine fibers are also used.

  In the present invention, any one of the yarn constituting the orthogonal nonwoven fabric composed of warp and weft and the yarn forming the oblique web for fixing the arrangement between the wefts is an adhesive thread (hereinafter sometimes abbreviated as an adhesive yarn). It is desirable that As the adhesive yarn, a fusion yarn that is melted by heat and develops an adhesive property, or a yarn made of a core-sheath type or a side-by-side type composite fiber is particularly suitable in the present invention. In addition, a three-layer tape with a core having a normal strength and heat resistance and an adhesive polymer on both surface layers is particularly suitable for the adhesive yarn of the present invention because of its low cost and large adhesive surface area. It is. The fused yarn is melted by heat and used as a yarn for forming an oblique web. In addition, as a bonding method, adhesiveness may be manifested by high frequency or induction heating, which is included in thermal bonding. In addition, the adhesive yarn not only exhibits adhesiveness by heat, but can also exhibit adhesiveness by chemical action such as moisture, solvent, plasticizer and the like.

  The weft and the yarn forming the oblique web in the present invention are limited to the above-described yarn. However, the warp web may be a wide sheet-like material such as non-woven fabric, paper, and widened tow in addition to a warp group in which a large number of yarns are running. It is used as warp material for orthogonal nonwoven fabrics.

  The present invention is characterized in that the means for producing an oblique non-woven fabric of yarn is used as means for fixing the alignment between wefts of orthogonal nonwoven fabric. As shown in Patent Documents 6, 7, and 8, oblique yarn nonwoven fabrics are nonwoven fabrics having an oblique yarn component extending over the entire width of the fabric with respect to the warp direction of the fabric, such as a triaxial nonwoven fabric and a four-axis nonwoven fabric. These are also included. In these oblique nonwoven fabric manufacturing methods, a yarn feed guide having a conveyor with a large number of yarn hooking pins on the left and right at a predetermined pitch in the traveling direction, and traversing on the conveyor from side to side is provided. A typical method is a method of manufacturing an oblique web of yarns by hooking yarns led from individual yarn supply capillaries alternately to the left and right yarn hook pins.

  Also in the oblique nonwoven fabric forming means in the present invention, a conveyor provided with a large number of yarn hooking pins on the left and right sides at a predetermined pitch in the traveling direction is used. The number of the thread hook pins is at least several tens or more and is usually composed of several hundreds or more. The conveyor in the present invention is a means for moving a large number of pins, and there are a belt method in which pins are planted on a belt and a chain method in which pins are attached to a chain, and pins are planted on both ends of a cylinder. Also used. These conveyors desirably circulate endlessly.

  In the oblique web forming means in the present invention, the yarn guided from the individual yarn supply thin tubes provided in the yarn supply guide is traversed from the yarn supply guide to the left and right to the yarn hooking pins on the left and right conveyors. By alternately hooking left and right, an oblique web of yarn is formed. The yarn feed guide is means for holding a plurality of yarn feed tubules in order to traverse a large number of yarn feed tubule groups from side to side. There may be one yarn feeding capillary, but it is usually in the range of several tens to several hundreds. The yarn supply thin tube is a yarn positioning guide for carrying the individual yarns to be obliquely moved to the individual pin positions with high positional accuracy, and is not necessarily a tube, and may be a snail wire or a comb, Although they are also included in the present invention, it is desirable to be tubular because the position is determined accurately. However, only a flat hole may be used, and the positioning range (in the case of a tube, the inner diameter of the tube) is preferably smaller than the pin pitch, so the positioning range is usually small and is called a yarn feeding capillary tube.

  The conveyor of the present invention can also be used when a cylinder is formed (drum system). The conveyor that forms the cylinder is usually a pin that stands on both ends of the cylinder cylinder, and the pin is planted in a rigid solid, so the pin accuracy is less likely to go wrong, and the pin is cylindrical. It is also characterized by space saving. In the present invention, since the oblique web is formed as a weft web forming device for the orthogonal nonwoven fabric of yarns, there is little need to change the width of the weft web, so this drum system is particularly effective. In this drum system, the shape formed by the tips of the plurality of yarn supply tubules is preferably a shape along an arc formed by the cylinder. By doing so, it can be hooked on the thread hook pin with higher accuracy, the speed is increased, and the accuracy of the formed oblique nonwoven fabric is good.

  An object of the present invention is to manufacture an orthogonal nonwoven fabric with less disturbance in the yarn arrangement form. The orthogonal non-woven fabric, unlike woven fabrics and knitted fabrics, which are entangled with each other by interlacing the yarns, runs in a straight line and is bonded and joined between the processes to form a structure. The orthogonal nonwoven fabric has characteristics such as easy production of a coarse structure and high strength and Young's modulus because the yarn is linear and not bent. Another advantage is that the production speed is orders of magnitude greater than that of woven or knitted fabrics.

  An orthogonal non-woven fabric is usually manufactured by seamlessly superimposing on a warp web running a wide weft web cut to a length corresponding to the width of the wide warp web, and adhesively fixing the warp, the specific manufacturing means is The details are described in Patent Documents 1 and 2 mentioned above.

  In the orthogonal nonwoven fabric using the yarn of the present invention, unlike the woven fabric, the warp yarns are not entangled, so the warp yarns (or the fibers forming the warp webs and the weft yarns) need to be bonded with an adhesive. . The adhesive in the joining can be joined by the warp yarn or the yarn forming the oblique web having an adhesive component such as a composite fiber. Other adhesives can also be added and joined. In addition, the orthogonal non-woven fabric made of the yarn according to the present invention uses a fusion yarn that is finally dissolved in the yarn forming the oblique web. This is a biaxial structure background laminate. The present invention has a feature that not only can an orthogonal nonwoven fabric having a normal biaxial structure be produced, but also a defect that lacks the dimensional stability in the oblique direction of the orthogonal nonwoven fabric in the biaxial structure can be reinforced by the yarn forming the oblique web. . Further, it has a feature that a four-axis structure can be obtained by increasing the number and pitch of yarns forming the oblique web.

  In the present invention, one feature is that the oblique direction of the orthogonal nonwoven fabric is reinforced by the oblique web, and the four-axis nonwoven fabric structure (pseudo four-axis nonwoven fabric) shown in Patent Documents 7 and 8 can be obtained. In this pseudo 4-axis non-woven fabric, the slanting yarns forming the oblique web are folded back by the width of the weft web. Therefore, compared to the 4-axis structure shown in Patent Documents 7 and 8, it is continuous in the longitudinal direction of the vertical web. It is different in not doing. However, due to the existence of the oblique web, a remarkable reinforcing effect is expected in the oblique direction of the orthogonal nonwoven fabric.

  Further, in the orthogonal nonwoven fabric of the present invention, the angle of the oblique thread of the oblique web (oblique angle) can be changed, and various oblique angles can be taken depending on the use of the product as the orthogonal nonwoven fabric. . For example, when cross-woven fabric is used for cloth adhesive tape and it is desired to improve transverse tearability, the oblique angle is set to 22.5 degrees or less. If the orthogonal nonwoven fabric is strengthened in the 45 degree direction, the oblique angle is 45 degrees. Further, if the orthogonal nonwoven fabric is reinforced in the vertical direction, the object is achieved by setting the oblique angle to 60 degrees or more.

  The skew web in the present invention usually protrudes from the width of the weft group, but both ends of the oblique web protruding from the weft web are trimmed before the warp web and the weft web are laminated. Sometimes it is left. This is the case where the protruding portion is large and the stability of the process lamination process is hindered, or in the product after lamination, the protruding portion wraps and the product appearance is not good. However, in the arrangement fixing of the weft group by the oblique web in the present invention, the protruding portion can be suppressed to several millimeters, and usually the above trimming is not required.

  The weft, the yarn forming the oblique web, and the warp used in the present invention are supplied from a device for supplying a weft group, a device for supplying a yarn group forming the oblique web, and a warp web supply device. The yarns stored in the bobbin, reel, beam, and the like are arranged at a constant pitch by a yarn guide such as a comb, and are drawn out at a constant speed by a nip roll, a friction roll, or the like. When the warp web is a wide sheet such as a non-woven fabric, it is drawn out at a constant speed by a nip roll or the like from a roll-shaped body.

  In the above description, it is desirable that the means for forming the weft web and the background laminating means are continuous. However, means for winding the weft web may be provided after the means for forming the weft web. The wound weft web is fed out and used in another weft laminating means. It is desirable to remove the distortion of the web caused by winding the weft web that is fed out by heat treatment or the like. In the present invention, since it is not necessary to use a material having low heat resistance such as a hot melt adhesive for the weft web, it is one of the features that the temperature of the heat treatment for removing the strain can be raised.

  According to the present invention, the arrangement of yarns in an orthogonal nonwoven fabric of yarns can be made orderly, and the product appearance and product properties can be improved. In addition, in the present invention, it becomes possible to improve the strength and dimensional stability in the oblique direction, which has been a problem with conventional orthogonal nonwoven fabrics, and even in the case of coarsely skewed yarn, the strength in the oblique direction is almost one digit. Can be up. In addition, in the present invention, it is not necessary to use hot melt as opposed to the one in which the wefts are joined with a conventional hot melt adhesive filament, so that the heat resistance of the orthogonal nonwoven fabric can be improved.

  Moreover, since the arrangement | sequence between the yarns which comprise a weft web is being fixed, this invention can be manufactured stably and productivity can be improved. In the present invention, an oblique nonwoven fabric forming device is used for the weft web supply device of the weft laminating machine, but the conventional oblique nonwoven fabric forming device complicates the device for changing the product width. It is necessary to adjust the distance between the left and right pins of the belt. However, since the weft web in the orthogonal nonwoven fabric in the present invention does not require a width change, the apparatus may be very simple, and the yarn forming the oblique web in the present invention fixes the arrangement between the weft yarns. Therefore, the yarn pitch of the yarn forming the oblique web may be generally coarse, and from this point, the apparatus becomes simple and the production speed is increased.

  Furthermore, the background laminating apparatus according to the present invention is also simplified, enabling a wide laminating machine to be realized at a low cost. In the conventional method in which the arrangement between the weft yarns is not fixed (the above-mentioned Patent Document 3, etc.), there are various restrictions such as the necessity of using a wide belt corresponding to the product width as the belt of the weft laminating device. On the other hand, in the present invention, since the weft groups are firmly arranged and fixed, a small number of multi-strip belts may be used, so that the apparatus becomes simple and a wide-width apparatus is possible. Further, since the width of the weft web in the present invention is exactly constant, even if the production speed is increased, it is possible to obtain a product with less wrapping and gaps and less disturbed yarn arrangement.

  Further, the orthogonal nonwoven fabric according to the present invention is characterized by having various product types that are not found in conventional orthogonal nonwoven fabrics, such as a type having a quasi-four-axis structure and a type having oblique angles of skewed yarns. To do. Moreover, the orthogonal | woven cloth which has various design effects can also be made by making the thread | yarn to skew into a color thread | yarn.

  FIG. 1 shows an example in which the weft groups in the present invention are arranged and fixed by oblique webs. On the weft group consisting of the wefts 1 in many directions, the slanting yarns 2 are folded at both ends of the weft group to cross each other to form the oblique web 3, and the oblique web constituting the oblique web 3. It is joined to the running yarn 2 and the weft 1. For ease of understanding in the figure, the weft 1 and the skewed yarn 2 are all shown as a single line, but a tape with a large width or a thick yarn can be used for each. When the oblique angle α of the yarn forming the weft and the oblique web is small (less than 45 degrees), the weft arrangement effect is increased, but the productivity is lowered, and when it exceeds 45 degrees, the weft arrangement effect is lowered. But productivity goes up. However, when it is desired to have the reinforcing effect in the 45 degree direction, which is a defect of the orthogonal nonwoven fabric, with the yarn forming the oblique web, it is desirable that this α is 45 degrees. The skewed yarn 2 can be used more coarsely than shown in the figure if it is only for fixing the arrangement of the weft groups. Compared to the number of weft yarns 1, one tenth or less is sufficient, and the yarn used may be thin and weak. When the purpose is to obliquely reinforce the orthogonal nonwoven fabric to some extent, the number of weft yarns 1 is about a fraction of the number of weft yarns 1 and the yarns used have some strength.

  FIG. 2 shows an example of the arrangement of yarns in an orthogonal nonwoven fabric of yarns produced according to the present invention. FIG. 2A shows an example in which the skewed yarn 2 forming the oblique web in FIG. 1 is a heat-sealing yarn and melts after the pasting and does not retain its form. The orthogonal nonwoven fabric 11 in this case is a normal yarn orthogonal nonwoven fabric having a biaxial structure in which the warp 12 and the weft 1 are orthogonal. (B) The figure shows the example in which the orthogonal nonwoven fabric 14 is formed by the oblique webs 3a, 3b, 3c in which the wefts 1 are arranged and fixed with the coarsely skewed yarn 2. (C) The figure shows the example in which the orthogonal nonwoven fabric 16 is formed by the oblique webs 3a, 3b, and 3c in which the wefts 1 are arranged and fixed with the obliquely arranged yarns 2 arranged densely. in this case. The example in which the diagonal direction of the orthogonal nonwoven fabric 16 is reinforced by the densely skewed yarns 2 and the orthogonal nonwoven fabric 16 has a pseudo 4-axis structure is shown. In the case of a normal four-axis nonwoven fabric, the skewed yarns 15a and 15b indicated by P in the figure are continuous, whereas in the present invention, the oblique four-axis non-woven fabric is expressed by the oblique yarns 15a and 15b is folded at that portion, indicating that the structure is not continuous. Further, in FIGS. 2B and 2C, when the increase in the strength in the oblique direction is expected, the distance between the skew webs 3a, 3b, and 3c is narrowed so that the end portions of the skew webs overlap slightly. It is desirable to approach. Although not shown, even when a wide sheet such as a non-woven fabric is used as the warp web instead of the warp group, the group of weft yarns is arranged and fixed with diagonal yarns, and used as an aid for diagonal reinforcement. Can do.

  FIG. 3 is a plan view showing only an essential part of an example of an apparatus in which a weft group consisting of wefts 1 according to the present invention is arranged and fixed by skewed yarns 2 forming an oblique web 3. Conveyors 21a and 21b are arranged on the left and right in the direction of travel, and thread catching pins 22a and 22b are arranged on the respective conveyors 21a and 21b at a predetermined pitch. A set of screws 23 a and 23 b arranged in parallel across the conveyor 21 is arranged on the thread hook pin 22, and each of the screws 23 a and 23 b can be rotated forward and backward by a servo motor 24. . A yarn feeding guide 26 is further fixed to the traverse tool 25 supported at both ends by the set of screws 23, and the conveyors 21a, 23b, 23b, 23b are rotated along the screws 23a, 23b. Traverse between 21b. Due to the traverse of the yarn supply guide 26, a large number of yarn supply thin tubes 27 provided in the yarn supply guide 26 pass between the yarn hooking pins 22, so that the skewed yarn 2 supplied to the yarn supply thin tube 27. Is hooked on the yarn hooking pin 22, and the yarn 2 that runs diagonally between the left and right yarn hooking pins 22 a, 22 b runs zigzag in accordance with the traverse of the yarn feeding guide 26, thereby forming the oblique web 3 of the yarn. The oblique angle α is determined by the relationship between the traveling speed of the conveyor 21 and the traverse speed of the yarn feeding guide 26. It is to be noted that a track 28 crossing the conveyors 21a and 21b can be provided, and various forms of oblique webs with various oblique angles changed by changing the angle β (90 degrees in this figure) formed with the vertical direction. (Patent Document 8). This oblique web 3 of yarns and a group of wefts fed out from the weft supply device and arranged at a constant pitch are bonded and fixed to form a weft web 29 in which the arrangement pitch of the weft groups is fixed.

  FIG. 4 is another example of the oblique web forming apparatus for yarn according to the present invention, in which a cylinder is used as a conveyor for carrying the yarn hooking pins, FIG. A is a plan view, and FIG. Shown in the figure. On both sides of the cylinder 31, thread hook pins 32 are planted at regular intervals in equal divisions. A yarn supply guide 33 traverses on the curved surface of the cylinder 31, and a raw material yarn 35 that is a skewed yarn is supplied to a yarn supply capillary 34 provided in the yarn supply guide 33. The raw material yarn 35 is hooked on the yarn hooking pin 32 by the traverse of the yarn feeding guide 33 and becomes a skewed yarn 36. In the present invention, when traversing the yarn feeding guide 33, it is desirable that the arc shape formed by the tip of the yarn feeding thin tube 34 is a shape along the arc formed by the cylinder. The shape along the arc means that the radii of the circles forming the arc are substantially the same, and the difference in radius is preferably at least 20% or less, more preferably 15% or less, and more preferably 10% or less. Most preferably. The skewed yarn 36 and a group of wefts fed out from the weft supply device and arranged at a constant pitch are bonded and fixed to form a weft web 37 in which the arrangement pitch of the weft groups is fixed.

  In FIG. 5, the example of the orthogonal laminated nonwoven fabric manufacturing system by the thread | yarn in this invention is shown. A large number of wefts 1 are drawn from the creel frame 41 through warps combs 42 by nip rolls 43 a and 43 b and guided to the oblique web forming portion 45 as a weft group 44. In the oblique web forming portion 45, a raw material yarn 35 that is a raw material of a skewed yarn prepared separately is supplied to the yarn supply capillary 34 of the yarn supply guide 33. Then, the yarn feeding guide 33 traverses between the yarn hooking pins 32 provided at both ends of the cylinder 31 shown in FIG. 4 so that the raw material yarn 35 guided from the yarn feeding thin tube 34 is left and right. The oblique web 46 is formed by the rotation of the cylinder 31 and the traverse of the yarn feeding guide 33. By the weft group 44 on the cylinder 31, the oblique web 46 formed between the yarn hook pins 32 is peeled off from the yarn hook pins, guided to the heat cylinder 47, and nipped between the heat cylinder 47 and the pressing rubber roller 48. Thus, the arrangement of the weft groups 44 is bonded and fixed by the oblique web 46 to fix the arrangement between the wefts, and the weft web 50 is formed. In this case, it is desirable that at least one of the weft 1 and the slanting yarn 36 is an adhesive yarn by heat.

  The weft web 50 exiting the heat cylinder 47 is guided to a horizontally circulating lattice conveyor 51 and is cut by the cutter 52 every length corresponding to the width of the vertical web. The cut weft web 53 is transported on a lattice conveyor 51, and a multi-circulation belt 54 that travels in the warp direction at different heights is traveling above the lattice conveyor 51. The belt presser 55 is actuated instantaneously at a certain timing to push down the circulation belt 54, and the surface tension or adhesion force of water attached to the circulation belt 54 or water to which a thickener or adhesive is added. Then, the cut weft web 53 is attached and picked up. The fixed timing means that by picking up the weft web 53 cut at every fixed timing, the weft web picked up on the surface of the running multi-circulation belt 54 is put on without any breaks. It is determined by the web width of the circulation belt 54, the lattice conveyor 51, and the cut weft web 53.

  FIG. 6 is a view of the apparatus of FIG. 5 turned 90 degrees and viewed from the traveling direction of the lattice conveyor 51. The surface of the traveling multi-circulation belt 54 is wetted with water in the bus 61, and the cut weft web 53 is transferred onto the multi-circulation circulation belt 54 by the mechanism shown in FIG. . The weft webs 53 a, 53 b... Reprinted on the multi-circulation circulation belt 54 are peeled off from the circulation belt 54 by the release yarns 62 passing between the circulation belts 54, and below the release yarns 62 and the lattice conveyor 51. It is sandwiched between the warp web 64 supplied from the side and transferred to the thermal cylinder 64. The warp web 63 and the weft webs 53a, 53b,... On the heat cylinder 64 are bonded and fixed on the heat cylinder 64 by pressing the rubber roll 65 to form an orthogonal nonwoven fabric 66 of the warp-laminated yarns. In the figure, the peeling yarn 62 is shown in an example in which it is circulated. However, every other half of the warp yarn is used as the peeling yarn 62, and the latter half warp yarn is used as the warp web 63, whereby the peeling yarn 62 is used. In the product, and an orthogonal nonwoven fabric in which the weft webs 53a, 53b... Are sandwiched between every other warp from above and below can be manufactured.

  In FIG. 6, the warp and weft are bonded to each other with at least one of the weft and the oblique yarn being a heat-adhesive yarn, and the warp and the weft are also bonded to each other with a heat cylinder or An example in which thermal bonding can be easily performed on 64 is shown. However, the joining between the wefts is led to the emulsion adhesive bath in FIG. 6 with the weft webs 53a, 53b... By controlling the nip to a certain amount and then drying with a heat cylinder, it is possible to bond and fix the background with an emulsion adhesive component. A powder adhesive can be used instead of the emulsion adhesive.

  5 and 6 show the case where the multi-circulation circulation belt 54 is used. However, when the weft group is not arrayed and fixed, as shown in Patent Document 3, a product with a good product appearance will be manufactured. Then, it is necessary to run with a single belt and the vertical web along the surface of the single belt, pick up the weft group with the single belt and the vertical web, and it is necessary to be a single belt with accuracy. Widening was difficult and the equipment cost was high. In addition, it is necessary to attach an adhesive or the like to the vertical web, a long drying time is required, and the productivity does not increase. In the present invention, a simple multi-strip belt may be used, and the adhesive is firmly fixed between the wefts, so that even normal water can be easily picked up, and the amount of water on the heat cylinder 65 is extremely small. We were able to.

  As the weft and the slanting yarn, a three-layer tape stretched tape having a width of 2.5 mm, 480 dtex, a surface layer LDPE, and a core layer HDPE was used and thermally bonded at 110 ° C. with the apparatus of FIG. A weft web in the form of FIG. 1 is formed. The weft pitch was 7 mm, the skewed yarn pitch was 25 mm, and the weft web width was 1200 mm. Then, the same weft as the warp is used at a pitch of 7 mm, the product width is 1.2 m, the line speed is 50 m / min, and the temperature of the thermal cylinder 64 in FIG. Good orthogonal nonwoven fabric could be manufactured stably. This orthogonal nonwoven fabric has a structure shown in FIG. The strength of the produced orthogonal nonwoven fabric in the oblique direction was 62.8 N / 50 mm. On the other hand, in the case of the conventional method (Patent Document 3) in which there is no slanting yarn, even if it is manufactured at 30 m / min, the yarn arrangement of the product is disordered, and the strength in the diagonal direction of the product is 7.7 N. / 50mm, weak by almost one digit. The strength of one of the used yarns is 18.1 N / piece. In addition, the measurement of the intensity | strength of the diagonal direction was performed by the tension | pulling speed of 100 mm / min by 100 mm between chuck | zippers by the sample cut out to the diagonal 45 degree direction by 50 mm width. The number of test samples is n = 5, and is obtained by arithmetic average.

  The weft is a glass fiber yarn (750 dtex) that is skewed at a pitch of 5 mm, and the same glass fiber yarn and a heat-bonded yarn (75 dtex for polyamide filament yarn, melting point 110 ° C.) are used at an oblique angle of 45 degrees. A weft web having a width of 1200 mm was prepared with a pitch of 5 mm. The same glass fiber as the weft is used as a warp at a pitch of 5 mm, and an acrylic emulsion adhesive is used as the warp with the manufacturing apparatus shown in FIGS. 5 and 6. The product width is 1.2 m and the line speed is 50 m / min. The orthogonal non-woven fabric having the quasi-four-axis structure shown in FIG. 2C could be stably produced without disturbing the yarn at a temperature of 150 ° C. of the heat cylinder 64 shown in FIG.

The orthogonal nonwoven fabric obtained by the present invention is used as a nonwoven fabric, reinforced wrapping paper, reinforced film or the like laminated with a nonwoven fabric, paper or film and reinforced with yarn.

In the present invention, the state of the skewed yarn fixed to the weft group is schematically shown. The various forms of the orthogonal nonwoven fabric manufactured by this invention are modeled. The example of the apparatus which forms an oblique web on the weft group of this invention is shown with a top view. Another example of an apparatus for forming an oblique web on the weft group of the present invention is shown in a plan view (A) and a part of the apparatus is shown in a sectional view (B). It is shown with the side view of the apparatus which carries out the orthogonal crossing of the process of orthogonal nonwoven fabric in this invention. Fig. 6 shows another side view of the device of Fig. 5;

Explanation of symbols

1: weft, 2: skewed yarn, 3: oblique web.
11: orthogonal nonwoven fabric, 12: warp,
14: orthogonal nonwoven fabric, 15: skewed yarn, 16: orthogonal nonwoven fabric.
21a, 21b: conveyor, 22: thread hook pin, 23a, 23b: screw,
24: Servo motor, 25: Traverse tool, 26: Yarn feed guide,
27: Yarn supply tube, 28: Orbit, 29: Weft web.
31: cylinder, 32: thread hook pin, 33: yarn feed guide,
34: Yarn supply tube, 35: Raw material yarn, 36: Slanting yarn, 37: Weft web.
41: creel frame, 42: comb, 43a, 43b: nip roll,
44: Weft group 45: Oblique web forming part 46: Oblique web
47: thermal cylinder, 48: pressing rubber roller, 50: weft web.
51: Lattice conveyor, 52: Cutter, 53; Cut weft web,
54: Circulation belt, 55: Belt depressing tool.
61: Water bath, 62: Peeling thread, 63: Vertical web,
64: thermal cylinder, 65: rubber roll, 66: orthogonal nonwoven fabric.

Claims (2)

At least one of the yarn forming the oblique web and the yarn forming the weft group is an adhesive yarn,
A yarn group is led from individual yarn supply tubes provided in a yarn supply guide that has a plurality of yarn hooking pins at the left and right at a predetermined pitch in the traveling direction, and traverses the conveyor left and right. Process,
The yarn group guided from the yarn supply thin tube advances obliquely by being alternately hooked on the left and right yarn hooking pins, and the oblique web is formed by crossing these oblique yarn groups. A process to be formed;
Preparing a unidirectional array of a large number of yarns, which are arranged at regular intervals, and which form a weft group of orthogonal nonwoven fabrics of yarns;
A step of forming a weft web by joining the oblique web and a unidirectional array of yarns to be the weft group;
Preparing a warp web that is a warp material of an orthogonal nonwoven fabric of yarn,
A process in which the vertical web and the weft web are subjected to a process orthogonal lamination joining;
The manufacturing method of the orthogonal nonwoven fabric of the filamentous material which contains and is contained . At least one of the yarn forming the oblique web and the yarn forming the weft group is an adhesive yarn,
An apparatus for guiding yarn groups from individual yarn supply capillaries provided in a yarn feed guide having a conveyor having a plurality of yarn hooking pins at left and right at a predetermined pitch in the traveling direction, and traversing the conveyor from side to side. When,
The yarn group led from the yarn supply tubule is hooked alternately on the left and right yarn hooking pins so that the yarn group zigzags obliquely, and the diagonally intersecting yarn groups intersect to form an oblique web. A device to let
A weft supply device that is arranged at a fixed interval and configured to be supplied with a unidirectional array of a large number of yarns that form a weft group of orthogonal nonwoven fabrics of yarns;
A joining device in which a weft web is formed by joining the oblique web and a unidirectional array of yarns that form a weft group of orthogonal nonwoven fabrics of the yarn;
Separately, a vertical web supply device that supplies a vertical web that is a warp material of an orthogonal nonwoven fabric of yarn,
A warp laminating apparatus in which the vertical web and the weft web are joined to each other in a crosswise manner;
The included in the same apparatus, the orthogonal woven threads of manufacturing equipment.

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