JP2009034897A - Fiber laminate, padding cloth for dress and ornaments using fiber laminate, combination paper, and packaging material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To impart the elongation and bulkiness to a fiber laminate in which a plurality of fiber arrangement layers formed by arranging fibers unidirectionally are piled up so that the longitudinal directions of the fibers meet each other at right angles. <P>SOLUTION: The fiber laminate 1 is formed by laminating a plurality of the fiber arrangement layers 2A-2D wherein the fibers 3A-3D are arranged unidirectionally. The partial fiber arrangement layers 2A and 2C and the other fiber arrangement layers 2B and 2D are laminated so that the orientation directions of the fibers meet each other at right angles. A plurality of slits 4 extending in parallel with one of the orientation directions 5A, 5C, and S1 of the fibers of the partial fiber arrangement layers 2A and 2C or the orientation directions 5B, 5D, and S2 of the fibers of the other fiber arrangement layers 2B and 2D are formed in the fiber laminate. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fiber laminate, and a clothing interlining, a slip sheet, and a packaging material using the fiber laminate.

Conventionally, fiber arrangement layers in which fibers (filaments) are arranged in one direction are known (Patent Documents 1, 2, and 3). This fiber array layer can be manufactured by extruding a thermoplastic resin such as polyethylene, polypropylene, polyester, etc. in a molten state from a spinning nozzle into a thread shape and depositing it on a belt (conveyor) that runs in one direction. In this specification, the direction in which the fibers extend on the belt is referred to as the longitudinal direction. By stretching the fibers deposited on the belt in the longitudinal direction, the direction of the fibers can be further aligned in the longitudinal direction. The fiber array layer produced in this way has a large specific strength in the longitudinal direction and high deformation resistance in the longitudinal direction, but is easily deformed in the lateral direction (direction perpendicular to the longitudinal direction in the fiber array layer). . Thus, by stacking a plurality of such fiber array layers so that the longitudinal directions of the fibers are perpendicular to each other, a fiber laminate having high specific strength and deformation resistance in any direction can be obtained.
JP 11-302961 A JP 2001-98455 A JP 2001-140159 A

  Such a fiber laminate has characteristics such as durability, light weight, and high strength, and thus is used in various applications such as houses, automobile seats, filters, and bag making. However, its use is limited because it has poor elongation and is not bulky. The present invention is the above-mentioned fiber laminate in which a plurality of fiber arrangement layers in which fibers are arranged in one direction are overlapped so that the longitudinal directions of the fibers are orthogonal to each other, and the fiber laminate having elongation and bulkiness The purpose is to provide.

  The fiber laminate of the present invention is a fiber laminate formed by laminating a plurality of fiber arrangement layers in which fibers are arranged in one direction, and some fiber arrangement layers and other fiber arrangement layers are made of fibers. The layers are laminated so that the stretching directions are orthogonal to each other. The present fiber laminate is provided with a plurality of slits extending in parallel with either the fiber stretching direction of some fiber array layers or the fiber stretching direction of other fiber array layers.

  When a tensile force is applied to the fiber laminate in a direction orthogonal to the direction in which the slits extend, the slits open in the direction of the tensile force, so that the elongation of the fiber array layer is improved. At this time, since the slit opens in a teardrop shape, the opening width of the slit changes at each position in the extending direction of the slit. Therefore, the amount of extension of the fiber laminate tends to change at each position in the extending direction of the slit. However, when the planar extension amount of the fiber laminate is deformed so as to be constant regardless of the position in the slit extending direction, the portion with a large elongation amount absorbs the large elongation amount, Deforms to incline with respect to the main surface. As a result, the bulk of the fiber laminate is increased. Thus, by providing the slit, it is possible to impart elongation and bulkiness to the fiber laminate while maintaining properties such as durability, light weight, and high strength.

  It is desirable that the slits be arranged so that any slit passes through an arbitrary cross section orthogonal to the extending direction of the slits.

  The fiber laminate is preferably formed with a plurality of grooves extending in a direction orthogonal to the direction in which the slits extend.

  The clothing interlining, slip sheet, and packing material of the present invention can be manufactured using the fiber laminate described above.

  Thus, according to the present invention, there is provided the above fiber laminate in which a plurality of fiber arrangement layers in which fibers are arranged in one direction are overlapped so that the longitudinal directions of the fibers are orthogonal to each other, and the elongation and bulkiness are increased. The provided fiber laminated body can be provided.

  Hereinafter, the fiber laminate of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of the fiber laminate of the present invention. The fiber laminate 1 is formed by laminating a plurality of fiber arrangement layers in which fibers are arranged in one direction. In the figure, four fiber array layers 2A, 2B, 2C, and 2D are shown, but the number of stacked layers can be determined as appropriate according to the application. The fiber array layers 2A, 2B, 2C, 2D are thermocompression bonded together to form one fiber laminate 1 as a whole.

  FIG. 2 is an enlarged partial perspective view showing a part of the fiber array layer. Although only the fiber array layers 2A and 2B are shown in the figure, the other fiber array layers have the same configuration. As shown in the figure, the fiber array layer 2A is an aggregate of a large number of fibers 3A extending in parallel and in a straight line. Similarly, the fiber array layer 2B is an aggregate of a large number of fibers 3B extending in parallel and in a straight line. The fibers 3A and 3B may be folded in the middle or laminated in two or more layers. The fiber array layer 2A can be made from thermoplastic resins such as polyethylene, polypropylene, polyester, polyamide, polyvinyl chloride resin, polyurethane, and fluorine resin, and modified resins thereof. Resins by wet or dry spinning means such as polyvinyl alcohol resins and polyacrylonitrile resins can also be used. The same applies to the fiber array layer 2B. The diameter of each fiber 3A, 3B is, for example, about 10 μm. The fiber array layers 2A and 2B are laminated so that the stretching direction 5A of the fibers 3A of the fiber array layer 2A and the stretching direction 5B of the fibers 3B of the fiber array layer 2B are orthogonal to each other. The stretching direction 5C of the fibers 3C of the fiber array layer 2C is orthogonal to the stretching direction 5B of the fibers 3B of the fiber array layer 2B. Similarly, the stretching direction 5D of the fibers 3D of the fiber array layer 2D is orthogonal to the stretching direction 5C of the fibers 3C of the fiber array layer 2C. The direction of the fibers in the fiber array layer does not need to be orthogonal to each other between adjacent fiber array layers, and two or more fiber array layers having the same stretching direction may be provided continuously.

  The fibers 3A, 3B, 3C, and 3D of the fiber array layers 2A, 2B, 2C, and 2D are not bent in directions other than the stretching directions 5A, 5B, 5C, and 5D, and are not directed in random directions. It has extremely high linearity and directionality. Therefore, even if a tensile force is applied in the fiber drawing direction, the fiber is hardly stretched. On the other hand, since almost no resistance force is generated against the tensile force in the direction orthogonal to the fiber stretching direction, when each of the fiber array layers 2A, 2B, 2C, 2D is provided alone, These fiber array layers are freely deformed. For example, when the fiber array layer 2A is provided alone, it hardly deforms with respect to the tensile force in the stretching direction 5A, but freely deforms with respect to the tensile force in the direction orthogonal to the stretching direction 5A. In the present embodiment, the fiber array layers 2A, 2B, 2C, and 2D are provided in a laminated manner, and the fibers 3A and 3C of the fiber array layers 2A and 2C are stretched directions 5A and 5C (hereinafter collectively referred to as a first direction). The fibers 3B and 3D of the fiber array layers 2B and 2D are respectively drawn in directions 5B and 5D (hereinafter collectively referred to as a second direction S2. The second direction S2 is the first direction). Is perpendicular to S1). Thus, by laminating the fiber array layer so that the fiber drawing directions are orthogonal to each other, a large strength and a restraining force against deformation are generated with respect to a tensile force from any direction.

  FIG. 3 is a top view of the fiber laminate. A large number of slits 4 are provided in the fiber laminate 1. The slit 4 is provided through the fiber laminate 1. The slits 4 are arranged in a staggered manner, and when the slits 4 are viewed from the first direction S1, the slits 4 belonging to the row R1 overlap with the slits 4 belonging to the adjacent row R2 (x in the drawing). The arrangement of the slits 4 is not limited to a staggered pattern, but the slits 4 are preferably arranged so that any one of the slits 4 passes through an arbitrary cross section orthogonal to the direction in which the slits 4 extend. In FIG. 3, this condition is realized by the overlapping portion x. Due to this overlap, elongation is easily imparted to the fiber laminate 1. The slit 4 extends in parallel with the second direction S2, but may extend in parallel with the first direction S1.

  FIG. 4 is a schematic diagram illustrating a state in which the slit that has received the tensile force is deformed. As shown in the top view of FIG. 4A, when a tensile force is applied in the first direction S1, the slit 4 opens in the first direction S1. When viewed in a plan view, the slit 4 opens in a substantially tear shape so as to be widest at the center. For this reason, the amount of elongation of the fiber laminate 1 in the first direction S1 varies between the position P1 passing through the center of the slit 4 and the position P2 passing through the end of the slit 4. However, when a force is applied so that the fiber laminate 1 extends evenly in the first direction S1, the planar extension amount of the fiber laminate 1 is not the same in any position in the second direction S2. Don't be. For this reason, in order to absorb the excessive elongation amount in the center part of the slit 4, as shown in FIG.4 (b) (sectional drawing along the bb line of Fig.4 (a)), the center part of the slit 4 is shown. In the vicinity of, the fiber laminate 1 is deformed obliquely with respect to the main surface 8 of the fiber array layer. The state of deformation is also shown in FIG. 4 (c) showing the deformation of the actual fiber laminate. As a result, the bulkiness H of the fiber laminate 1 increases. The bulkiness H can be appropriately adjusted by changing the size of the slits 4, the arrangement pitch, and the like.

  FIG. 5 is a cross-sectional view of the fiber laminate as viewed from line 5-5 in FIG. Referring to FIG. 3 together, the fiber laminate 1 is creped so as to have a groove 6 extending in the first direction S1. When a tensile force is applied in the second direction S2, the groove portion 6 is deformed so as to have a linear shape, so that an elongation is imparted. The degree of elongation can be adjusted by changing the depth, pitch and the like of the groove 6. Moreover, the bulkiness of the fiber laminated body 1 increases by providing the groove part 6. An increase in bulkiness due to the deformation of the slit 4 cannot be expected in a state where the slit 4 is not deformed, but even in that case, a certain bulkiness can be secured by the groove 6.

  Thus, the fiber laminated body of this embodiment is equipped with the elongation with respect to 1st direction S2 and 2nd direction S2, and big bulkiness. In addition, since the characteristics such as durability, light weight, and high strength described above are maintained as they are, a new application range is expanded.

  For example, in a clothing interlining, it is desirable that there is some elongation in all directions in order to ensure comfort as clothing. The fiber laminate of the present embodiment is suitable for a clothing core because it satisfies such requirements, has high dimensional stability, is lightweight, and has air permeability. When applied to a clothing interlining, a large bulk is not preferable, but as described above, the bulk can be controlled by adjusting the slit arrangement, the shape of the groove formed by creping, and the like. When applying to the interlining for clothing, it is also possible not to crepe.

  The fiber laminate of the present embodiment can also be suitably used as an in-process interleaving paper disposed between products that are in contact with each other and easily damaged. Such in-process slip sheets require a certain amount of bulkiness, but the fiber laminate of the present embodiment can be provided with an appropriate bulkiness by slitting and creping. Moreover, since the fiber laminate of the present embodiment is breathable and can also be given greater breathability by slit processing, it is particularly suitable between products that dislike adhesion and between products that preferably ensure aeration. Can be used.

  The fiber laminate of the present embodiment can be suitably used as a packaging material. If a large slit is formed to increase the deformation capability, it can be deformed following the shape of the object, and at the same time, the bulk of the fiber laminate is increased by opening the slit portion during deformation. As a result, the object can be wrapped and protected in a bulky manner, and can be suitably used as a packaging material. Since the bulk is suppressed unless creping is performed, the efficiency of handling the packaging materials at the time of transportation is improved. If soft packaging is required, it may be creped to give it more bulk. This packing material can be used, for example, for packing easily broken items, fruits, precision instruments and the like.

  Next, the manufacturing method of the fiber laminated body demonstrated above is demonstrated. FIG. 6 shows a schematic view of a production apparatus used for producing the fiber array layer. The fiber array layer manufacturing apparatus 21 includes a spinning unit 22 mainly composed of a meltblown rice 24 and a conveyor 25, and a stretching unit 23 composed of stretching cylinders 26a and 26b, take-up nip rollers 27a and 27b, and the like. ing. The melt blown rice 24 has a large number of nozzles 28 arranged at the tip (lower end) in a direction perpendicular to the paper surface (only one is shown in the figure). A large number of fibers 31 are formed by the molten resin 30 fed from a gear pump (not shown) being extruded from the nozzle 28. Air reservoirs 32a and 32b are provided on both sides of each nozzle 28, respectively. High-pressure heated air heated to a temperature higher than the melting point of the resin is sent to the air reservoirs 32a and 32b, and is ejected from slits 33a and 33b communicating with the air reservoirs 32a and 32b and opening at the tip of the melt blown die 24. As a result, a high-speed air flow substantially parallel to the extrusion direction of the fibers 31 extruded from the nozzle 28 is generated. The fiber 31 extruded from the nozzle 28 is maintained in a meltable state that can be drafted by the high-speed airflow, and the fiber 31 is drafted by the frictional force of the high-speed airflow, thereby reducing the diameter of the fiber 31. The temperature of the high-speed airflow is set to 80 ° C. or higher, desirably 120 ° C. or higher, than the spinning temperature of the fiber 31. In the method of forming the fiber 31 using the melt blown rice 24, the temperature of the fiber 31 immediately after being extruded from the nozzle 28 can be made sufficiently higher than the melting point of the fiber 31 by increasing the temperature of the high-speed airflow. Therefore, the molecular orientation of the fiber 31 can be reduced.

  A conveyor 25 is disposed below the melt blown rice 24. The conveyor 25 is wound around a conveyor roller 29 and other rollers that are rotated by a drive source (not shown), and the fibers extruded from the nozzles 28 by driving the conveyor 25 by the rotation of the conveyor roller 13. 31 is conveyed rightward in the drawing.

  The fiber 31 flows along a high-speed airflow that is a flow in which high-pressure heated air ejected from the slits 33a and 33b on both sides of the nozzle 28 is merged. The high-speed air current flows in a direction substantially perpendicular to the conveying surface of the conveyor 25 by the high-pressure heated air ejected from the slits 33a and 33b.

  A spray nozzle 35 is provided between the melt blown rice 24 and the conveyor 25. The spray nozzle 35 sprays mist-like water into a high-speed air stream, whereby the fibers 31 are cooled and rapidly solidified. Although a plurality of spray nozzles 35b are actually installed, only one is shown in FIG. The fluid ejected from the spray nozzle 35 is not necessarily required to contain moisture or the like as long as the fiber 31 can be cooled, and may be cold air.

  An elliptical airflow vibration mechanism 34 is provided in a region near the melt blown rice 24 where high-speed airflow is generated by the slits 33a and 33b. The airflow vibration mechanism 34 rotates in the direction of the arrow A around an axis 34a that is substantially orthogonal to the conveyance direction D of the fibers 31 on the conveyor 25, that is, substantially parallel to the width direction of the fiber array layer to be manufactured. Be made. In general, when a wall exists in the vicinity of a high-speed jet of gas or liquid, the jet tends to flow near the direction along the wall surface, which is called the Coanda effect. The airflow vibration mechanism 34 changes the flow direction of the fibers 31 using this Coanda effect. In the case of FIG. 6, when the elliptical long axis of the airflow vibration mechanism 34 coincides with the direction of the high-speed airflow (vertical direction in the drawing), the fibers 31 fall almost vertically toward the conveyor 25. When the airflow vibration mechanism 34 rotates 90 degrees around the axis 34a and the elliptical long axis of the airflow vibration mechanism 34 is orthogonal to the direction of the high-speed airflow, the fibers 31 are in the transport direction D (right side in the figure) of the conveyor 25. At this time, the displacement is maximized. When the airflow vibration mechanism 34 further rotates around the shaft 34a, the position where the fibers 31 drop onto the conveyor 25 periodically moves in the front-rear direction with respect to the transport direction D. That is, the solidified fibers 31 are collected on the conveyor 25 while being swung in the vertical direction, and are partially folded in the vertical direction and continuously collected.

  The fibers 31 collected on the conveyor 25 are transported in the transport direction D by the conveyor 25, nipped by the stretching cylinder 26a and the pressing roller 36 heated to the stretching temperature, and transferred to the stretching cylinder 26b. Thereafter, the fiber 31 is nipped between the stretching cylinder 26b and the pressing rubber roller 37, transferred to the stretching cylinder 26b, and is in close contact with the two stretching cylinders 26a and 26b. In this way, the fibers 31 are sent while being in close contact with the drawing cylinders 26a and 26b, so that the fibers 31 become a web in which the adjacent fibers 31 are fused together while being partially folded in the vertical direction.

  The web obtained by being in close contact with the drawing cylinders 26a and 26b is further taken up by take-up nip rollers 27a and 27b (the take-up nip roller 27b in the subsequent stage is made of rubber). The peripheral speed of the take-up nip rollers 27 a and 27 b is larger than the peripheral speed of the stretching cylinders 26 a and 26 b, whereby the web is stretched in the longitudinal direction and becomes the longitudinally stretched fiber array layer 38. In this way, the stretchability of the filaments can be further improved by stretching the spun web in the machine direction. When the fiber 31 is sufficiently quenched, the fiber 31 having a small stretching stress and a high elongation is formed. This is realized by spraying mist-like water from the spray nozzle 35 as described above and including the mist-like liquid in the high-speed airflow. In the fiber array layer formed by the method described above, the directions of the fibers are aligned in one direction.

  The fiber array layers thus produced are sequentially laminated and thermocompression bonded so that the fiber directions are orthogonal to each other. Furthermore, the above-mentioned fiber array laminate is completed by forming slits and applying creping.

It is a disassembled perspective view of the fiber laminated body of this invention. It is a fragmentary perspective view which expands and shows a part of fiber arrangement layer. It is a top view of a fiber laminated body. It is a schematic diagram which shows the state which the slit which received the tensile force deform | transforms. It is sectional drawing of the fiber laminated body seen from the 5-5 line of FIG. It is the schematic of the manufacturing apparatus used for preparation of a fiber arrangement | sequence layer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fiber laminated body 2A, 2B, 2C, 2D Fiber arrangement layer 3A, 3B, 3C, 3D Fiber 4 Slit 5A, 5B, 5C, 5D Stretching direction 6 Groove part S1 1st direction S2 2nd direction

Claims (6)

A fiber laminate formed by laminating a plurality of fiber arrangement layers in which fibers are arranged in one direction,
Some of the fiber arrangement layers and the other fiber arrangement layers are laminated so that the drawing directions of the fibers are orthogonal to each other,
A fiber laminate in which a plurality of slits extending in parallel with either the drawing direction of the fibers of the partial fiber arrangement layer or the drawing direction of the fibers of the other fiber arrangement layer are provided.   The fiber laminate according to claim 1, wherein the slit is disposed so that any slit passes through an arbitrary cross section orthogonal to a direction in which the slit extends.   The fiber laminate according to claim 1, wherein a plurality of groove portions extending in a direction orthogonal to a direction in which the slit extends are formed.   A clothing interlining using the fiber laminate according to any one of claims 1 to 3.   Interleaving paper using the fiber laminate according to any one of claims 1 to 3.   The packing material using the fiber laminated body of any one of Claim 1 to 3.

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