WO2003070457A1

WO2003070457A1 - Reinforced stretch non-woven fabric

Info

Publication number: WO2003070457A1
Application number: PCT/JP2003/001860
Authority: WO
Inventors: Hideo Kumehara; Yukio Sugita
Original assignee: Nippon Petrochemicals Co., Ltd.
Priority date: 2002-02-20
Filing date: 2003-02-20
Publication date: 2003-08-28
Also published as: JP2003236964A

Abstract

A reinforced stretch non-woven fabric which comprises a base material layer and, laminated on one surface thereof through pressing, a reinforcing material layer. The base material layer is preferably a stretched orthogonal non-woven fabric prepared by arranging fibers comprising a thermoplastic resin in almost one direction and stretching the fibers in the direction of the arrangement thereof to form a stretched uni-directional arrangement non-woven fabric, and laminating two sheets of the stretched uni-directional arrangement non-woven fabric so as for the two directions of fiber arrangement to be orthogonal with each other. The reinforcing material layer is preferably a non-woven fabric having a net form prepared by stretching a film having a plurality of slits formed therein in the direction parallel to the slits, to form a uni-axially oriented film having a net form, and laminating the oriented film having a net form so as for the two orientation axes to be orthogonal.

Description

Description Reinforced stretching

INDUSTRIAL APPLICABILITY The present invention can be suitably used in a wide range of packaging materials, architectural / civil engineering materials, industrial materials, agricultural materials, and the like, has excellent surface smoothness, has good IJ characteristics, and has both vertical and horizontal directions. The present invention relates to a reinforced stretch member having an excellent strength balance in one direction and a high tear strength.

Conventionally, for example, as a material used for packaging materials and construction and civil engineering materials, two stretched unidirectionally aligned nonwoven fabrics obtained by unidirectionally arranging and stretching a thermoplastic resin »| It is known that the layers are perpendicular to each other and are not perpendicular to each other (see, for example, Japanese Patent Application Laid-Open Nos. 1-64008 and 3-36948). Stretched non-suspended not only has the feature that elongation is low due to the stretching action and the cap strength is high, but also has a fiber whose uniformity is low but the texture is uniform due to the high arrangement of the notes. . As described above, the stretched orthogonal nonwoven fabric is suitable as a packaging material because the concealment is arranged in almost one direction, so that it has a design life, has good surface smoothness and glossiness, and has excellent printing characteristics. It is used for In addition, the stretch orthogonality is different from that of a spunbond nonwoven fabric manufactured by a general dry manufacturing method, a spunbond method, in that »is arranged in the longitudinal direction and the transverse direction. Suitable for construction, civil engineering, industrial, and agricultural materials because of its excellent balance of strength.

However, although the above-mentioned stretched orthogonal nonwoven fabric has a sufficiently high tensile strength in the stretching direction, it has an orthogonal lamination structure, so that the strength against shear force, that is, the tear strength, is not so high.

Some packaging materials, such as desiccants, dehumidifiers, oxygen scavengers, and oxidative heating agents, contain stored power. As a material ^^, a material with high tear strength is required to prevent these active materials from flowing out. For building materials, construction is performed in a large area like house wrap: ^ It is important that tear strength is high and construction is easy. ± ^: Materials include テ geotextiles used for 維持 keeping slopes'protection and separating soft ground. Since the geotextile has an accessory attached to the earth and sand even after construction, the shear stress S is applied to the geotextile by the pressure from above, so it is desirable that the geotextile also has a high tear strength. It is.

Also, with industrial tapes, which are a part of industrial materials, especially curing tapes and masking tapes, once they are pasted on the skin and then peeled off, the tapes are pulled at a stretch over a long distance. Peeling is performed. Also in this case, since the tape has a small tear stress, the tape base must also have high tear strength so that the tape base is not cut in the middle. Furthermore, in the field of agricultural materials, light-shielding sheets, heat-insulating sheets, sticky sheets, etc. are generally used for several seasons, so they need to be durable. Moreover, when these sheets are tunneled or removed from the tunnel, the sheets are forced to tear in the bow I tearing direction, so that sheets used as agricultural materials must also have high tear strength. Can be In addition, since sheets used as agricultural materials are generally installed outdoors, it is required that the sheets do not break even under strong wind, and tear strength is an important physical property from this point as well.

As described above, in order to use stretched orthogonal nonwoven fabrics in a wider range, not only high tensile strength but also high! / The tear strength was required. Disclosure of the invention

The present invention improves the tear strength while utilizing the properties of a stretched unidirectionally aligned nonwoven fabric, such as surface smoothness and high tensile strength, and conveys a reinforced stretched nonwoven fabric that is suitably used in a wide range of fields as a sheet or sheet. With the goal.

In order to achieve the above object, the reinforced stretched nonwoven fabric of the present invention comprises at least one stretched unidirectionally aligned nonwoven fabric which is spun from a thermoplastic resin and is stretched in a crosswise direction. The “W layer is laminated by press-bonding to at least one surface of the“ layer ”, and the reinforcing layer has a network structure. As described above, by laminating the reinforcing material layer having a network structure on the layer composed of the stretched unidirectionally aligned nonwoven fabric, a nonwoven fabric with significantly improved tear strength, which is a weak point of the stretched unidirectionally aligned nonwoven fabric, is obtained. . It is preferable that the support layer is not stretched perpendicularly, in which two sheets of unidirectional stretches are laminated so that the arrangement directions of 瞧 are perpendicular to each other. Thereby, the strength balance in the »direction and the lateral direction is not excellent.

It is preferable that at least the laminating surfaces of the reinforcing layer and the reinforcing material layer are made of the same material, thereby improving the adhesive strength between them. As the reinforcing material layer, a multilayer film in which a layer made of a second thermoplastic resin having a lower melting point is laminated on both surfaces of a layer made of the first thermoplastic resin, It is possible to use a reticulated nonwoven fabric obtained by superimposing and fusing two uniaxially oriented reticulated films stretched in a direction that is efficient with the slit so that the orientation axes are orthogonal to each other.

As described above, according to the present invention, by laminating a layer having a unidirectional orientation and a reinforcing material layer having a network structure, tearing is performed while utilizing the properties of the unidirectional orientation. The strength can be improved, and the range of non-use applications can be greatly expanded. In addition, by making the 1-year-old layer non-stretching orthogonal, it is possible to make the 1-year-old layer excellent in balance between the ί direction and the lateral direction.

In the present invention, the “longitudinal direction” used in the description of the arrangement direction and the stretching direction of »means a vertical direction, ie, a feeding direction, in producing a nonwoven fabric or a web, and the“ horizontal direction ”means a vertical direction. The direction perpendicular to the direction, that is, the direction of the width or the width of the web. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a cross-sectional view of a reinforced stretched nonwoven fabric according to one embodiment of the present invention.

FIG. 2A is a perspective view of a part of the uniaxially oriented network film shown in FIG.

FIG. 2B is an enlarged view of the vicinity of the end face of the uniaxially oriented network film shown in FIG. 2A. FIG. 3 is a perspective view of a raw film used for producing the uniaxially oriented network film shown in FIG.

FIG. 4 is a perspective view of a part of another example of the uniaxially oriented network film applicable to the present invention. is there.

FIG. 5 is a cross-sectional view of another embodiment of the present invention without reinforced stretching.

FIG. 6 is a cross-sectional view of a reinforced stretcher according to still another embodiment of the present invention. FIG. 7 is a cross-sectional view without reinforcement stretching according to still another embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view of one embodiment of the present invention without reinforced stretching. As shown in FIG. 1, the reinforced stretcher 1 is a stretch stretcher which is formed by laminating two stretched unidirectional arrays 2a and 2 so that the alignment directions of the two are perpendicular to each other. It has a layer 2 and a reinforcing material layer 3 having a network structure laminated on one side of the layer 2. The unidirectional stretching irregularities 2a and 2b are filaments made of a thermoplastic resin (hidden) arranged in almost one direction and stretched in the arrangement direction of the capillaries. In addition, the reinforcing material layer 3 is composed of a mesh formed by laminating two uniaxially oriented mesh films 4.

Hereinafter, the stretching orthogonality and the shape irregularity will be described in detail.

Salinated orthogonal nonwoven fabric>

The drawing orthogonality is defined as a laminate of a drawing unidirectional alignment 2a in which the filaments are arranged and drawn in the longitudinal direction and a drawing unidirectional alignment 2b in which the filament is drawn in the horizontal direction. It is.

As described above, the stretched unidirectional nonwoven fabrics 2a and 2b are made by stretching filaments in the direction of their own lj, and the fiber (thickness) is 2 in the spinning stage, just like a normal nonwoven fabric. A filament of ~ 3 dT eX is spun, but this is stretched 5 to 10 times in the filament arrangement direction. e X or less. In this ^ \ spinning stage, the filaments are not oriented and the filaments that have been piled up are arranged in a certain direction, so by stretching them in the direction of filament arrangement, small filaments, in other words, thin filaments, are drawn. Even if it does, the tensile strength after stretching is improved. However, since the arrangement of the filaments in the spinning stage is not perfect, the unstretched unidirectionally-arranged nonwoven fabrics 2a and 2b contain Stretched filaments and unoriented filaments are slightly mixed, and the fiber mainly has a unidirectional stretching of 1.5 dT eX or less. The undrawn filament has a low melting point and is melted in the subsequent laminating process, so that it functions as an adhesive between the filaments of the drawn unidirectional alignment 2 &, 2b.

There are two types of non-stretched one-way alignments 2a and 2b: vertical stretching and horizontal stretching, but in the present embodiment, any of these can be used, and the combination is free. It is. Vertical stretched nonwoven fabric is a nonwoven fabric in which filaments are arranged and stretched in the »direction, which is the feed direction when manufacturing the nonwoven fabric, and horizontal stretched nonwoven fabric is a direction perpendicular to the feed direction when manufacturing nonwoven fabric In this case, the filaments are arranged and stretched in the lateral direction.

The vertically stretched nonwoven fabric is described in detail.

As the vertical stretching failure, for example, the one disclosed in Japanese Patent Application Laid-Open No. 10-24767 can be used. Hereinafter, the vertical stretched nonwoven fabric will be described together with its manufacturing method.

First, a draft tension is applied to the filament extruded from the nozzle provided in the die, thereby reducing the diameter of the filament and placing it on a conveyor. At this time, the filament melt immediately after exiting the nozzle is actively heated, or the atmosphere near the nozzle (at the position immediately after the filament is spun from the nozzle) is maintained at a high temperature. The temperature during this time should be sufficiently higher than the melting point of the filament to minimize the molecular orientation of the filament due to drafting of the filament. As means for raising the temperature of the atmosphere near the nozzle to high temperature, any of hot air blowing from a die, heater heating, and a heat retaining cylinder can be used. As a means for heating the filament melt, infrared radiation or laser light can be used.

One way to apply draft tension to the filament is to use a meltblown (MB) die. This method has the advantage that the molecular orientation of the filament can be reduced by increasing the flow of hot air. However, in the normal MB method, the filaments accumulate randomly on the conveyor, and the filaments are subjected to heat treatment on the conveyor due to the influence of hot air, resulting in low stretchability. At this point, air containing mist-like moisture is conveyed to the filament spun from the nozzle. Is ejected obliquely to the transfer surface of. Thereby, the filaments are arranged in the vertical direction and cooled.

Another method of applying draft tension to the filament is the spunbond (SB) method in a narrow sense, that is, a method using a so-called ejector or air sucker below a large number of nosles. In the ordinary SB method, the filament is cooled immediately after it comes out of the nozzle, so that molecular orientation occurs in the filament, and the filament is randomly accumulated on the conveyor. Therefore, in the same way as the MB method mentioned above: ^, the molecular orientation is reduced by combining the means for maintaining the filament at high temperature near the nose, and the mist-like water or cold air is supplied into the ejector. The filament is sufficiently cooled to obtain a filament having good stretchability, and a fluid containing the filament is supplied obliquely to the conveyor conveying surface, so that the filament arrangement can be improved.

In this way, the filaments can be satisfactorily arranged in the vertical direction by tilting the filaments with respect to the conveying surface of the conveyor and determining the filaments. Means for causing the filament to move relative to the transport surface include tilting the nozzle with respect to the conveyor, turning the filament with the aid of fluid, and tilting the conveyor with respect to the spinning direction of the filament. Is effective. These may be used alone or in combination of a plurality of means. Use a fluid near the nozzle: ^ indicates that the fluid is desirably heated. Also, if no fluid is used near the nozzle, the heater actively heats near the filament and the nozzle. This is to avoid as much molecular orientation as possible when the diameter of the filament is reduced by drafting.

The above MB method is the best method of SB method! / Even though fluid is used to make the filament slant against the conveyor's transport surface, the most common fluid near the conveyor is a cold fluid, especially a fluid containing atomized water. desirable. This is to prevent the crystallization from progressing by quenching the spun filament. As the crystallization force advances, stretchability decreases. In addition, spraying atomized water also has the effect of adhering the web accumulated on the conveyor onto the conveyor, and as a result, improving spinning stability and improving the alignment of filaments. As described above, the filaments are accumulated on the conveyor to form a gap.However, the web is suctioned from the back side of the conveyor, so that the web is operated on the conveying surface of the conveyor and becomes unstable. It can stabilize the web and also has the effect of removing heat. In this case, it is important that the suction of the web is performed with a narrow width in a straight line in the width direction of the conveyor. Even in the normal SB method, suction is often performed! / ヽ, but ^ is wide, and the suction I is performed over a large area, so that the uniformity of basis weight in the plane of the web is improved, and the filament The purpose is to make the arrangement as random as possible, which is different from the purpose of suction in the present embodiment. Further, the suction in the present embodiment also has the effect of reducing the influence of water in the subsequent stretching step, because it also removes water sprayed in a mist for cooling. In the case of polyester, moisture greatly affects the stretchability, and variations in moisture depending on the site impair the uniformity of stretching, and reduce the stretching ratio and the strength of the web after stretching.

The keyed web on the conveyor is stretched in the »direction, which renders it unvertible. By stretching the web in the »direction, the alignment of the filament in the» direction can be further improved. At this time, the better the arrangement of the filaments in the longitudinal direction, the higher the probability that the filaments are substantially stretched when the web is stretched in the ^ direction, and the greater the strength of the final stretched web. If the arrangement of the filaments is poor, the probability that the filament is substantially stretched is reduced only by increasing the distance between the filaments even when the gap is stretched, and sufficient strength after stretching cannot be obtained. In the longitudinal stretching of the web, there is ^^ that stretches in one step, but the multi-step stretching method is mainly used. In the multi-stage drawing method, the first-stage drawing is performed as pre-drawing immediately after spinning, and the subsequent second-stage drawing is performed as drawing. Among them, the use of the proximity stretching method for the first stage of the multistage stretching is particularly suitable for the present invention.

Proximity stretching is a method in which the web is stretched by the difference in surface speed between two adjacent rolls, and stretches while maintaining a short distance between stretches (the distance from the start point to the end point). It is desirable that the distance between stretching is 10 Omm or less. In particular, even if the filaments are arranged as a whole in the ¾ direction, there are individual bends. It is important for effectively drawing the filament. Heat in proximity stretching is usually given by heating the stretching roll, and the stretching point is supplementarily heated by hot air or infrared rays. Also, as a basket for proximity stretching,? ¾K and steam can also be used.

On the other hand, in multi-stage drawing, not only proximity drawing but also various means used for drawing ordinary webs (eg, aggregates of »and filaments in nonwoven fabrics) are applied to the second and subsequent steps. it can. For example, stretching methods such as roll stretching, ¾ stretching, steam stretching, »stretching, and roll rolling are used. Proximity drawing is not necessary because the individual filaments are already long in the longitudinal direction in the first drawing step.

Next, the stretched nonwoven fabric will be described. As the horizontal stretch, for example, the stretch disclosed in Japanese Patent Application Laid-Open No. 3-36948 can be used. In order to manufacture a stretch-drawn nonwoven fabric, first, a web in which filaments are arranged in a substantially horizontal direction is formed. A web in which filaments are arranged in a substantially horizontal direction is formed by causing the filaments extruded from the spinning nozzle to oscillate in the horizontal direction by air injection from air injection holes arranged around the spinning nozzle, and to accumulate on a conveyor. be able to.

In order to cause the filament to oscillate in the horizontal direction by air injection from around the spinning nozzle, a plurality of air jets around the spinning nozzle, each with a circumferential component centered on the spinning nozzle (usually 3 ), And the ejected air collides with the outside of these first air ejection holes in the direction opposite to the direction of web transport by the conveyor. And two second air ejection holes arranged so as to be in contact with each other. The filament extruded from the spinning nozzle is spirally rotated by air jetting from the first air jetting hole. On the other hand, the air ejected from the second air ejection hole collides with each other on the passage of the rotating filament, and spreads at right angles to the conveying direction by the conveyor, that is, in the lateral direction. The rotating filaments are scattered laterally by the force of the air. As a result, filaments are accumulated on the conveyor in a state where there are many array components in the horizontal direction.

The web thus obtained is stretched in the transverse direction. Extend the web Examples of the stretching method include a tenter method and a pulley method. The tenter method is generally used as a method for widening a film or the like, but it requires a large floor area, and it is difficult to change the product width / magnification ratio. In the case of flaws, the product width must be freely changed depending on the application, and the stretching ratio must be changed according to the thickness of the raw material. Therefore, it is preferable to use a boogie method that makes these changes easily even during driving operation! / ,.

The bully-type stretching device has a pair of pulleys and a belt arranged at intervals in the width direction of the web for gripping both side ends of the web. The pulleys are arranged symmetrically with respect to the center line in the width direction of the web so that the outer circumference has a divergent trajectory, and each is rotated at the same peripheral speed. On the other hand, the belt is wound under tension corresponding to each pulley, and one part of this belt is applied to the area from the position where the distance between the pulleys is narrow to the position where it is widened, and the outer peripheral end face of each pulley It is fitted in the groove formed in the hole.

The web is introduced from a place where the distance between the pulleys is narrow, and both ends are gripped by the pulley and the velvet. As the pulley rotates, the web passes through a diverging trajectory created by a pair of pulleys while being gripped by the belt, whereby the web is stretched in the lateral direction. Hot water or hot air can be used for heating during this time.

As described above, a stretched nonwoven fabric that is aligned and stretched in the transverse direction of the filament filament S is obtained.

As described above, examples of the methods for producing non-stretched and non-stretched nonwoven fabrics are disclosed in Japanese Patent Application Laid-Open Nos. 10-204647 and 1-3-36964, respectively. However, in addition to this, a rod member having an elliptical cross section is placed in a hot-air basin used to apply draft tension to the filament, and the rod member rotates or periodically rotates. Vibration of the filaments utilizing the Coanda effect caused by an excessive movement can also provide a stretching one-way misalignment. Depending on the arrangement of the rod members, it is possible to make the vertical extension or horizontal extension incomplete.

The filaments constituting the non-vertical stretched and non-stretched nonwoven fabrics are long filaments. The long フィラメント filament ’here is essentially a long one The average length exceeds 100 mm. Since the diameter of the filament becomes rigid at 50 μπι or more, it is preferably 30 μπι or less, and more preferably 2 or less. In particular, for the purpose of non-strength, φ is desirably φ with a filament diameter of 5 μm or more. The length and 1 mm of the filament shall be measured by micrograph.

Examples of the thermoplastic resin constituting the filaments of the unidirectionally oriented filaments 2a and 2b include high-density polyethylene, polyolefin such as polypropylene, and nylon-polyester. Above all, polypropylene and polyester are cost and handling! Excellent in terms of / ヽ.

The above-described vertical stretched nonwoven fabric and horizontal stretched nonwoven fabric are preferably used as they are as one stretched unidirectionally aligned nonwoven fabric 2a and one stretched unidirectionally aligned nonwoven fabric 2b. As a result, the two stretched unidirectionally aligned nonwoven fabrics 2a and 2b can be continuously fed out and superimposed, and a seamless uniform layer 2 having no seams can be obtained. Also, the vertical stretching is marked in advance, and in the production stage of the horizontal stretching, the vertical stretching is fed out onto the horizontal stretching in the first step of transporting the horizontal stretching nonwoven fabric, and then stacked. By laminating these, layer 2 can be manufactured more efficiently. In addition, a stretched nonwoven fabric can be obtained using only the vertical stretched nonwoven fabric or the horizontal stretched nonwoven fabric. For example, when preparing a stretched orthogonal nonwoven fabric using only the vertical stretched nonwoven fabric, one vertical stretched nonwoven fabric is unwound as it is, and the other vertical stretched nonwoven fabric is cut to the same length as the other vertical stretched nonwoven fabric. By rotating by 90 ° and laminating on the other vertical stretched nonwoven fabric, it is possible to make the stretch perpendicular to nonwoven fabric. The same applies to the case where only horizontal stretching is used.

The two non-oriented one-dimensional arrangements 2a and 2b can be laminated by, for example, a hot embossing method. The embossing conditions vary depending on the type of resin used for the unidirectional stretching 2a and 2b, but are preferably 30 to 80 ° C lower than the melting point. In addition, when high surface smoothness is required for the sensible layer 2, the two stretched unidirectionally aligned nonwoven fabrics 2a and 2 can be laminated by a thermal rendering process.

The intuition layer 2 is composed of two drawn unidirectionally arranged nonwoven fabrics 2a and 2b, in which the fiber arrangement directions are different from each other. The strength in the »direction and in the lateral direction can be freely adjusted by adjusting the basis weight of both.

As described above, the base layer 2 is described. However, the basis weight of the base layer 2 is preferably 5 to: I 0 0 g / m ² , It can be selected according to the application. For example, for use in packaging materials that require air permeability, it is preferable that the basis weight of the layer 2 be 30 g Zm ² or less. On the other hand, for ^^ which requires higher strength, it is preferable to use a high basis weight.

As the reinforcing material layer 3, any material having a network structure, which can be laminated with the force and intuition layer 2 and which can reinforce the tear strength with respect to the base material layer 2, should be used. However, in this embodiment, a reticulated nonwoven fabric is used.

Hereinafter, the reticulated nonwoven fabric will be described in detail.

The reticulated film is obtained by laminating two uniaxially oriented reticulated films 4 as shown in FIG. 2A. As shown in FIG. 2 b, the uniaxially oriented network film 4 has a second heat having a melting point lower than that of the first thermoplastic resin on both surfaces of the layer 5 made of the high-melting first thermoplastic resin 14. It consists of a three-layered film in which layers 6 made of a plastic resin are laminated, and as shown in Fig. 2a, a plurality of trunks 4a extending to the TO each other, and extending across and adjacent to the trunks 4a.幹 »| 4 b which connects 4a to each other. Then, the two uniaxially oriented reticulated films, four forces, are mutually fused in the direction of the trunk »| 4a and are heat-fused to form a reticulated force S.

The thickness of the entire layer 6 made of the second thermoplastic resin is 50% or less, preferably 40% or less of the entire thickness of the uniaxially oriented network film 4. In order to satisfy various physical properties such as the adhesive strength at the time of heat fusion of the two uniaxially oriented network films 4, the layer 6 made of the second thermoplastic resin only needs to have a thickness of 5 m. It is preferably selected from the range of 10 to 10%.

Examples of a method for producing the uniaxially oriented network film 4 include the following method.

First, the layer 6 made of the second thermoplastic resin is laminated on both sides of the layer 5 made of the first thermoplastic resin by extrusion molding such as a multilayer inflation method or a multilayer die method. Manufactures a three-layer raw film. Next, as shown in FIG. 3, the raw film 7 is stretched in the longitudinal direction (the direction of the arrow L shown in FIG. 3), and split in a zigzag pattern in the »direction using a splitter (split processing). Then, this film is widened in the horizontal direction, whereby the -axis oriented net-like film 4 in which the trunks || 4a are arranged in the vertical direction in FIG. 2 is obtained.

The stretching ratio (orientation ratio) is preferably 1.1 to 15 times. If the draw ratio is less than 1.1, the mechanical strength of the nonwoven fabric is not sufficient. On the other hand, if the stretching ratio exceeds 15 times, it is difficult to stretch by a normal method, and problems such as the need for expensive equipment will occur. As the stretching method, any of a roll rolling method and a roll stretching method may be used, but the stretching method is particularly preferably a pseudo-axial stretching method. The rolling method referred to in this specification means that a thermoplastic resin film is passed between two heating rollers arranged with a gap smaller than the thickness thereof, and the melting point of the thermoplastic resin film is reduced.

(Softening point) A method of compressing at a temperature lower than the softening point and extending the length by the reduced thickness. The pseudo-axis stretching method is to pass a thermoplastic resin film between a low-speed roller and a high-speed roller (proximity roller) with the roller spacing as small as possible, and to minimize shrinkage in the Φ 畐 direction. This is mainly a method of stretching while reducing the thickness. When the width of the unstretched film is W, the width of the film after uniaxial stretching is "W, and the stretching ratio is V,

X = l— (V- ^1/2 ) X (W, / W)

Is an index indicating the pseudo-axiality of the stretching. The larger the value of X (0 <X> 1), the higher the pseudo-axiality.

Finally, two uniaxially oriented net-like films 4 obtained as described above are overlapped so that their orientation axes are orthogonal to each other, and heated and fused to obtain a net-like defect. At the time of heat fusion, the superposed uniaxially oriented net-like film 4 is supplied between a pair of calorie heating cylinders, and fixed so as not to cause shrinkage in the Ψ 畐 direction. In order not to lose the stretching effect, heat fusion is performed at a temperature lower than the melting point of the first thermoplastic resin and higher than the melting point of the second thermoplastic resin. In order to form a reticulated nonwoven fabric using the same uniaxially oriented network film 4, an orthogonal laminating machine is used for heat-sealing the uniaxially oriented network film 4. This orthogonal laminating machine In the case of heat-sealing, one uniaxially oriented network film 4 is supplied to the orthogonal laminating machine as it is, while the other is cut to the same length as the width of the uniaxially oriented network film 4, and one uniaxially oriented network film is cut. Supplied from a direction perpendicular to 4. Therefore, at this point, the seam of the other uniaxially oriented network film 4 exists at regular intervals.

In the case where the presence of this seam is not preferable, the uniaxially oriented network film 4 shown in FIG. 2a and the uniaxially oriented network film 9 shown in FIG. I like it. The uniaxially oriented reticulated film 9 shown in FIG. 4 is a raw film having the same structure as that used to produce the uniaxially oriented reticulated film 4 shown in FIG. The slit is slit in the zigzag direction (in the direction of arrow T in Fig. 4), and the slit is opened in the vertical direction by stretching in the horizontal direction. As a result, a uniaxially oriented network film 9 in which is arranged in a substantially horizontal direction is obtained. In this way, by laminating the uniaxially oriented network film 4 (vertical stretched network film) stretched in the »direction and the uniaxially oriented network film 9 (horizontal stretched network film) stretched in the transverse direction, a seamless The mesh can be made non-woven.

Here, the shelf constituting the uniaxially oriented network films 4 and 9 includes, for example, polyolefins such as polyethylene and polypropylene, copolymers thereof, polyesters such as polyethylene terephthalate and polybutylene terephthalate, and polyesters such as these. , Nylon 6, Nylon 66, and other polyamides, and copolymers of these, polychlorinated butyl, methacrylic acid or a copolymer of methacrylic acid or its syrup, polystyrene, polysnoreon, polytetrachloroethylene polycarbonate, Polyurethane and the like. Among them, polyolefin and its polymer, polyester and its polymer, which are easy to split, are preferable. In addition, the difference in melting point between the first thermoplastic resin and the second thermoplastic resin needs to be 5 ° C. or more for reasons of production, and preferably 10 to 50 ° C. C.

The basis weight of the mesh is preferably 10 to 60 g Zm ² in order to prevent the thickness from becoming too thick and to exert a necessary tear strength.

As described above, the reinforcing layer 2 and the reinforcing material layer 3 have been described. As a typical example of the crimping method, there is a contact method. For the thermocompression bonding method, There are a method using an embossing roll and a method using a mirror-finished roll. The base layer 2 is required to have a high surface smoothness: ^, the use of a mirror-finished roll is preferred. Further, in order to laminate the genius layer 2 and the stiffener layer 3 by adhesion, it is desirable that the layer 2 and the reinforcing layer 3 are made of the same material. That is, the reinforcing layer 3 is also made of polyolefin, and the base layer 2 is made of polyester. The reinforcing layer 3 is preferably made of polyester. However, since this is to improve the adhesive strength between the 層 ^ layer 2 and the reinforcing material layer 3, it is not necessary that the base material layer 2 and the reinforcing material layer 3 as a whole be made of the same material. It is sufficient that the lamination surfaces are made of the same material.

Even if the layer 2 and the reinforcing material layer 3 are made of different materials, a specific treatment can be performed to improve the adhesive strength between them. As a result of the present inventors' various studies on JE attachment, when attaching the polyester layer 2 made of polyester and the stiffener layer 3 made of polyolefin, corona treatment was applied to both of them just before thermocompression bonding. As a result, it has been found that both can be thermocompression-bonded to such an extent that sufficient adhesive strength is maintained. The reason is not clear, but the adhesion is increased by the addition of a polar group by corona treatment, and the resin of the fused reinforcing material layer 3 is inserted into the space between the ¾ # layer 2 and the integrated anchor. Effect; it is considered to work.

In addition to the ffi-bonding method, the ultrasonic bonding method can be used for the bonding between the support layer 2 and the reinforcing material layer 3. The ultrasonic pressure bonding method enables partial fusion, and is effective for maintaining air permeability and water permeability.

The compression bonding of the M2 and the reinforcing material layer 3 can be performed after the both are manufactured, and can be performed during the manufacturing process of the layer 2, although they can be overlapped and fed out. In other words, after the production of the Xiao layer 2, the reinforcing layer 3 manufactured in advance is supplied on the X2 layer in the process of transporting, without winding up the manufactured Yoki layer 2, so that it is suitable. ! Press them together using the ^ method. According to this method, the reinforced stretched filament 1 can be efficiently produced. As described above, in the present embodiment, the reinforcing material layer 3 made of a reticulated nonwoven fabric is laminated on the reinforcing layer 2 made of stretched non-woven fabric, so that the surface is excellent in smoothness, printing properties are good, and It takes advantage of the properties of a stretched nonwoven fabric having high tensile strength in the machine direction and the transverse direction, and furthermore has a reinforced stretched non-woven fabric 1 with improved tear strength. Can be In addition, the stretched unidirectional arrangement 不 2a, 2b, which is an extremely non-alignable arrangement of H !, and the mesh nonwoven, which is an orthogonal nonwoven fabric having a network structure, The effect of improving tear strength described above is synergistically exerted by combining two types of defects having different forms.

In the present embodiment shows an example in which the substrate layer ² at a draw orthogonal nonwoven fabric, as shown in FIG. ^5, the對才layer 1 2 consisting of a single stretched unidirectionally arranged non »1 2 a, A reinforced stretched nonwoven fabric 11 in which a reinforcing material layer 13 made of a mesh is laminated on one surface thereof can be used. This; ^ is determined by the direction in which the filaments of the filaments in the t-layer 12 require the tensile strength, which is mainly required by the non-stretched drawing. In other words, the filament orientation direction is set to the longitudinal direction when the tensile strength is not high, and the filament orientation is required when the large tensile strength is mainly required. The direction is the horizontal direction. For the stretched unidirectionally arranged nonwoven fabric 12a, any of the above-described vertical stretched nonwoven fabric and horizontal stretched nonwoven fabric can be used. The stretched nonwoven fabric is laminated on the reinforcing material layer 12 as it is, or the horizontal stretched nonwoven fabric is cut into the same length as the width of the reinforcing material layer 12 to form a tile, which is rotated 90 °. By laminating on the reinforcing material layer 12 or the like, the orientation direction of the filaments of the stretched unidirectionally arranged nonwoven fabric 12a can be set to the! ^ Direction. Further, the stretched nonwoven fabric can be directly laminated on the reinforcing material layer 12 or the lengthwise stretched nonwoven fabric can be cut into the same length as the width of the reinforcing material layer 12 to form a tile. By rotating the laminate on the reinforcing material layer 12 by rotating the filament, the arrangement direction of the filaments in the unidirectional stretching 12a can be set in the horizontal direction.

Further, in the present embodiment, the reinforcing material layer having the network structure is described as being formed in a net-like manner, but the reinforcing material layer is not limited to this.

As described above, the reticulated nonwoven fabric is formed by laminating two uniaxially oriented reticulated films, but only one of them may be used as a reinforcing material layer and laminated with a layer. The reinforced stretch non-woven fabric 21 shown in FIG. 6 is a stretched orthogonal nonwoven fabric 22 formed by laminating two stretched unidirectional stretches 22 a and 22 b so that the filament arrangement direction is orthogonal to the base material layer. Further, a single uniaxially oriented network film 23 is laminated thereon as a reinforcing material layer. Here, as the uniaxially oriented network film 23, shown in FIG. After stretching the raw film stretched in the vertical direction, split it in the vertical direction, and then expand it in the horizontal direction. The vertical stretched net-shaped film is obtained and slits are formed in the horizontal direction as shown in Fig. 4. Any of a horizontal stretched reticulated film in which the slits are opened in the longitudinal direction by stretching the obtained raw film in the vertical direction may be used. Which one to use may be determined according to the mechanical properties required for the reinforced stretched nonwoven fabric 21.

Regarding the unidirectional stretching system 1 ”, even if the filaments are not perpendicular to each other as a result, the vertical stretched nonwoven fabric and / or the horizontal stretched fabric described above can be used. A stretched nonwoven fabric can be used in appropriate combination. The simplest method in production is to directly laminate the vertical stretching and the horizontal stretching. Also, vertical stretched nonwoven fabrics or horizontal stretched fabrics are laminated. One is fed as it is, and the other is cut to the same length as the other to form a tile, which is rotated 90 °. By laminating them on the other side, the arrangement direction of the filaments can be made orthogonal.

Further, the reinforced stretched nonwoven fabric 31 shown in FIG. 7 is a single stretched unidirectionally aligned nonwoven fabric 32, on which a single uniaxially oriented network film 33 is laminated as a reinforcing material layer. As for the uniaxially oriented network film 33, any of a vertical stretched network film and a horizontal stretched network film may be used. Either the stretched unidirectional nonwoven fabric 32 or the vertically stretched nonwoven fabric or non-stretched nonwoven fabric can be used. That is, as a combination of the stretched unidirectionally aligned nonwoven fabric 32 and the uniaxially oriented network finolem 33 in the reinforced stretched nonwoven fabric 31, a vertical stretched nonwoven fabric, a vertical stretched reticulated film, a vertical stretched nonwoven fabric and a horizontal stretched reticulated film, There are four types: non-stretched non-woven fabric, vertical stretch reticulated finolem, horizontal stretch non-stretch and horizontal stretch reticulated film. However, reinforced stretching is not necessary! From the viewpoint of balance of Nada-like strength in the horizontal and vertical directions, the filament arrangement direction in the unidirectionally oriented non-aligned film 32 and the stretching direction of the raw film in the uniaxially oriented mesh film 33 are orthogonal to each other. It is desirable that the layers be stacked in such a manner. To achieve this, the combination of a vertically stretched nonwoven fabric and a horizontal stretched reticulated film, and the combination of a horizontal stretched non-woven fabric and a vertical stretched reticulated film are both fed out and laminated as they are. With stretched nonwoven In the case of a combination with a vertical stretched reticulated film, or a combination of a horizontal stretched non-stretched film and a horizontal stretched reticulated film, either one is fed out as it is, and the other is cut to the same length as the other width. To make a tile, rotate it 90 ° and stack it on top of the other.

Further, as the reinforced neo-layer, a non-woven fabric made of a uniaxially stretched multilayer tape or »can also be used. The uniaxially stretched multilayer tape is obtained by uniaxially stretching the same raw film as that used for producing the above-described uniaxially oriented network film at a stretching ratio of 1.1 to 15 times, preferably 3 to 10 times, or Previously, it was cut along the stretching direction. Then, the uniaxially stretched multilayer tape is arranged in parallel at regular intervals, and is laminated to form a nonwoven fabric, or the uniaxially stretched multilayer tape is woven into a woven fabric to form a reinforcing material layer. Can be used.

Further, in the above-described embodiment, the reinforcing material layer is laminated on one side of the countermeasure layer, and the reinforcing material layer may be laminated on both sides of the stress layer. Thereby, the tear strength can be further improved.

Since the reinforced stretched nonwoven fabric of the present invention has the above-described effects, it can be used for various uses such as packaging materials, building materials, industrial materials, agricultural materials, and the like. Table 1 shows application examples of the reinforced stretched nonwoven fabric of the present invention.

,

End use

Clothing Jumpers, jumper liners, shoes (in the shoes », protective«, baby shoes), shoe materials (insoles, fishing soles), patches, slippers, hats

Protection Protective clothing (work clothing, experimental clothing, anti-translation), supplies (smoke-proof mask, dust-proof mask, gas mask)

Roofing, tufting. Pet base cloth, anti-condensation sheet, wall covering, soundproof floor, anti-vibration material, wood board, curing sheet, house wrap, «material sealing sheet

Civil engineering drainage materials, filtration materials, suction prevention materials, separation materials, seepage control sheets, reinforcement materials, protection materials, asphalt overlays, repair materials for underground pipes, corrosion protection materials

Automotive Automotive equipment (floor mats, door trims, trunk mats, ceiling molding materials, rear materials Purcell, lining fabric, headrests, bonnet covers, sound absorbing materials, splicing materials, etc.) Automotive parts (air cleaners, oil filters, indoor clean filters, Outside air intake filter), Seat parts (Kinoletting, Silencer)

Furniture · Carpets (power carts, carpets, Taino carpets, electric carpets, mat base cloth, under carpet), furniture components (cushion materials, reception chairs) Filling inside), joinery (shoji paper, tatami mats, blinds), wallpaper, ornaments (ぺ Nantes, roll screens, artificial flowers)

Fill Air filter (fiM, medium-high performance, ultra-high performance), bag filter, liquid filter, electret filter, vacuum cleaner filter, filter press, wastewater treatment mat, salt removal filter, gas adsorption filter

Greenhouse sheet, nursery sheet, paddle sheet, anti-frost sheet, light-shielding sheet, grass-proof sheet, horticultural planter, heat insulation sheet

Packaging and storage supplies (storage bags, suit strength par, insect repellent par), packaging materials (furoshiki, furashi-no-sei-ichi wrap, wrapping), cleaning supplies (chemical rags, scourers), bags (chemical warmers, freshness holding materials, Oxygen absorber bags, desiccant bags, shopping bags), food products (tea bags, coffee bags, food bags, wrapping), household goods (calendars, anti-slip sheets, love masks, book covers, deodorizing sheets, odori sheets) , Kitchen utensils (drainer sheet, cooking paper, scrubber, scouring cloth, firefloor, firefighting cloth), tape nose top (tape'norecloth, place mat, coaster), office supplies (stamp pad, felt pen core, bulletin board materials, eraser,) , Sports equipment (golf club head cover, tennis racket grip) , Handicraft supplies,

Industrial materials (abrasive materials, oil-absorbing materials, papermaking phenolates, heat-resistant cushions, drainage materials for concrete frames, drainage materials, materials, heat-insulating materials, vibration-insulating materials), electric M materials (printed rooster electrical insulation materials, ® « Shielding material, S holding tape, product material (FRP, tape, printing fabric, synthetic paper, static recording material, adhesive tape, thermal transfer sheet, ¾lt line shielding mat), ΟΑβ (floppy disc liner , Floppy disk, packaging material, Avm (speaker diaphragm, sound absorbing material), roll (puff mouth, squeeze roll, oiling roll), β member (V belt, conveyor belt, timing belt), musical instrument (Piano key cushion, hammer rail) Next, specific examples of the present invention will be described together with comparative examples.

Here, the reinforced stretching was performed by the methods shown in Examples 1 to 3 below, and the tensile strength, elongation, and tear strength in the machine direction and the transverse direction of each of them were determined in accordance with JISL 196. And measured and evaluated. Further, for comparison, the tensile strength in the longitudinal direction and the transverse direction was similarly measured for the mesh member used in Example 1 (Comparative Example 1) and the stretch orthogonal member used in Example 3 (Comparative Example 2). The elongation, elongation, and tear strength were measured.

(Example 1)

In the present example, a vertical stretchable fiber was used as the reinforcing layer, and a mesh-like nonwoven fabric was used as the reinforcing material layer. '

The vertical stretched nonwoven fabric was produced as follows. A polypropylene resin (MFR: 40, melting point: 160 ° C, manufactured by San-Alomer Co., Ltd.) is used as the raw material resin, which is melt-kneaded by an extruder, extruded quantitatively by a gear pump, and extruded with hot air. It was spun into a filament form from a melt process die. The spun filaments are accumulated on a conveyor to form a web in which the filaments are arranged in a substantially vertical direction, which is stretched 6 times in the »direction by a stretching roll to form a vertically stretched nonwoven fabric (¾ | ¾ layer). ί «I did. It was 15 g / m ² when the basis weight of the «delayed vertical drawing» was measured. Subsequently, a mesh-like nonwoven fabric made of polypropylene (trade name: HSP-T, manufactured by Nisseki Plast Co., Ltd.) was prepared as a reinforcing material layer. The grammage of this reticulated nonwoven fabric was 35 g nom ² .

Thereafter, the warped stretched nonwoven fabric and the reticulated nonwoven fabric were superimposed on each other, and supplied between mirror rolls at 130 ° C. and a linear pressure of 30 kg / cm, and fffi-bonded to produce a reinforced stretched nonwoven fabric. The basis weight of the produced reinforced stretch was 50 gZm ² .

(Example 2) ''

In the present example, a stretched nonwoven fabric was used as the opposite layer, and a mesh-like nonwoven fabric was used as the reinforcing material layer.

The horizontal stretching failure was produced as follows. The same polypropylene resin as used in Example 1 was used as a raw material resin, melt-kneaded with an extruder, extruded quantitatively with a gear pump, and led to a spray nozzle. Spin from spray nozzle By blowing hot air onto the filaments emitted, the filaments were scattered in a direction perpendicular to the traveling direction of the conveyor, whereby the web in which the filaments were arranged in a substantially horizontal direction was accumulated on the conveyor. Subsequently, the web was stretched 6.5 times in the horizontal direction using a pull-type horizontal stretching machine, to produce a horizontal stretching non-suspended layer. The basis weight of the horizontal stretched nonwoven fabric was 15 g / m ² .

Further, following the production process of the horizontal stretched non-woven fabric, the same reticulated web as used in Example 1 is supplied onto the horizontal stretched non-woven fabric on the conveyor, and the horizontal stretched non-woven fabric is formed. The reticulated nonwoven fabric was overlaid. Then, both were arrived under the same conditions as in the first embodiment. I marked Shin Shin. The basis weight of the produced reinforced stretched non Hear is 5 0 g "m ² der ivy.

(Example 3)

In the present embodiment, a stretch orthogonality in which a vertical stretch and a horizontal stretch are laminated is used as a layer! / \ A mesh layer was used as the reinforcing material layer.

First, a vertically stretched nonwoven fabric was produced as follows. As a raw material resin, a polyester resin (manufactured by Teijin Limited, IV value: 0.6, melting point: 260 ° C) is melt-kneaded by an extruder, and is quantitatively extruded by a gear pump, and is heated with hot air. The filament was spun from a melt blow die. The spun filaments were accumulated on a conveyor to form a web in which the filaments were arranged in a substantially vertical direction, and this was stretched 6 times in the longitudinal direction by a stretching roll, to obtain a vertically stretched nonwoven fabric. When the basis weight of the produced vertical stretched nonwoven fabric was measured, it was 10 g nom ² .

On the other hand, horizontal stretching was produced as follows. Raw material: A polyester resin (manufactured by Teijin Limited, IV value: 0.5, melting point: 260 ° C) was used as the resin, melt-kneaded with an extruder, and extruded quantitatively with a gear pump. Led to the spray nozzle. By blowing hot air onto the filament spun from the spray nozzle, the filament is scattered in a direction perpendicular to the traveling direction of the conveyor, whereby the web in which the filaments are arranged in a substantially horizontal direction is placed on the conveyor. Was accumulated. Subsequently, this web was stretched 6.5 times in the ^^ direction using a pulley-type horizontal stretching apparatus to obtain a horizontal stretched nonwoven fabric. The basis weight of the unheared side was 10 g // m ² . In addition, following the manufacturing process of the horizontal stretching, the vertical stretching Was supplied onto the horizontal stretcher on the conveyor, and the horizontal stretch and the vertical stretch were overlapped. Both of them were embossed with an embossing roll heated to 220 ° C! / ヽ, and stretched perpendicularly (m) in which vertical stretch and horizontal stretch were laminated. .

Subsequently, as reinforcement layer, made of polyethylene, basis weight of 3 5 g / m ² reticulated nonwoven fabric (Nisseki Plasto Co., Ltd., trade name: HS 2 4) was prepared, these stretched perpendicular unsaturated After a corona treatment of 100 kWZm ^ min was performed on the opposing surfaces of the woven fabric and the reticulated nonwoven fabric, the two were superposed. The superimposed stretched non-woven fabric and reticulated web were supplied between mirror rolls at 100 ° C. and a linear pressure of 30 kg / cm and adhered to produce a reinforced stretched nonwoven fabric. The basis weight of the produced reinforced stretch was 55 gZm ² .

Table 2 shows the measurement results of tensile strength, elongation, and tear strength of the above Examples 1 to 3 and Comparative Examples 1 and 2 in the longitudinal and transverse directions.

Table 2

According to Table 2, the tensile strength and tear strength in the machine direction and the transverse direction were obtained by thermocompression bonding between the non-stretched one-way alignment (vertical stretch, horizontal stretch) and the mesh. It can be seen that is greatly improved. In particular, as is evident from the comparison between Example 3 and Comparative Example 2, in Example 3, it was considered that the tear strength would be given by the reticulation, as compared to the measurement in the stretching orthogonal hearing. Thus, it can be said that the synergistic effect of the tear strength was produced by combining two types of defects having different forms.

Claims

The scope of the claims

1. A genius layer composed of at least one stretched unidirectionally-arranged nonwoven fabric which is spun from a thermoplastic resin and which is arranged in the direction of the arrow and is stretched in a narrow direction.

A reinforced stretched nonwoven fabric having a net-like reinforcing material layer laminated with a genius layer by being pressed against at least one surface of the layer.

2. The reinforced fabric according to claim 1, wherein the support layer is a stretched orthogonal nonwoven fabric obtained by laminating two sheets of unidirectionally stretched one-way alignment so that the alignment directions of the two sides are orthogonal to each other. Stretching failure. ,

3. One of the two sheets of the unidirectionally stretched sheet is one in which the longitudinal direction is not aligned and the force is stretched, and the other is the one in which the pieces are arranged in the horizontal direction and the force is stretched. 3. The reinforced stretched nonwoven fabric according to claim 2, which is a stretched nonwoven fabric.

4. The two stretched unidirectionally aligned nonwoven fabrics are vertically stretched and force-stretched in a direction, and one of the stretchable nonwoven fabrics is placed on one of the lengthwise stretchable nonwoven fabrics. 3. The reinforced stretched nonwoven fabric according to claim 2, wherein the reinforced stretched nonwoven fabric is cut to the same length as the width of the vertical stretch and is rotated by 90 °.

5. The two stretched unidirectionally arranged nonwoven fabrics are laterally stretched laterally; the stretched horizontal stretched nonwoven fabric has one stretched nonwoven fabric and the other stretched nonwoven fabric on the other. 3. The reinforced stretch non-woven fabric according to claim 2, wherein the one stretched non-woven fabric is cut into the same length as the width of the one stretched non-woven fabric, and is laminated while being rotated 90 °.

6The reinforcing material layer is a multilayer formed by laminating a layer made of a second thermoplastic resin having a melting point lower than that of the first thermoplastic resin on both surfaces of a layer made of the first thermoplastic resin. 3. The reinforced film according to claim 2, wherein the film comprises a plurality of slits which are mutually different from each other, and a single uniaxially oriented reticulated film stretched in a direction opposite to the slits. Stretching failure.

7. The uniaxially oriented reticulated film is a longitudinally stretched reticulated film in which the slit is formed in the longitudinally stretched multilayer film and the slit is formed in the longitudinal direction, and the multilayer film is widened in the transverse direction. No reinforced stretching described.

8. The uniaxially oriented reticulated film is a horizontal-stretched reticulated film in which slits are opened by stretching the multilayer film in which the slits are formed in the transverse direction in the transverse direction. Reinforced stretched nonwoven fabric.

9. The reinforcing material layer is formed by laminating a layer made of a second thermoplastic resin having a melting point lower than that of the first thermoplastic resin on both surfaces of a layer made of a first thermoplastic resin. And a plurality of uniaxially oriented net-like films stretched in different directions from each other and fused to each other so that their orientation axes are orthogonal to each other. 2. The reinforced stretched nonwoven fabric according to claim 1, which is a reticulated nonwoven fabric.

10. The reinforced stretchable sheet according to claim 9, wherein the tiriB # layer is composed of one piece of vertical stretched sheet in which ■ is arranged in the direction »and stretched vigorously.

11. The reinforced stretchable non-woven fabric according to claim 9, wherein the tiilBS layer is made of one horizontal stretched nonwoven fabric stretched and arranged in the transverse direction.

1 2. The layer is composed of one vertical stretched nonwoven fabric in which »| is arranged in the vertical direction and one stretched nonwoven fabric in which the» is arranged in the horizontal direction and stretched vigorously. 10. The non-stretched stretch according to claim 9, wherein the stretch is orthogonal to the suspension.

13. The layer is made of one piece of the stretched unidirectionally aligned nonwoven fabric,

The reinforcing material layer is formed by laminating, on both surfaces of a layer made of a first thermoplastic resin, a layer strength S made of a second thermoplastic resin having a melting point lower than that of the first thermoplastic resin. The layer film, together with a plurality of slits of亍, this consists of slits and ^ ¹ direction one uniaxial orientation reticular film having been subjected to extended Shin, strengthening stretched nonwoven fabric according to claim 1.

1 4. The stretched unidirectionally-arranged nonwoven fabric does not include vertical stretches in which the 麵 is oriented and stretched, and the unidirectional uniaxially oriented net-like film has a tiff self-alignment with the multilayer stretched in the longitudinal direction. A vertical stretched reticulated film in which a slit is formed in the »direction and the multilayer film is widened in the horizontal direction. The vertical stretched reticulated film was cut to the same length as the width of the vertical stretched nonwoven fabric and rotated 90 °. 14. The reinforced stretcher according to claim 13, wherein the reinforced stretcher is laminated on the vertical stretcher in a state.

1 5. The stretching unidirectional alignment failure is a vertically stretched nonwoven fabric which is arranged in the direction of the direction and stretched in the vertical direction. The uniaxially oriented net-like film is the multilayer film in which the slits are formed in the lateral direction. 14. The reinforced stretched nonwoven fabric according to claim 13, which is a horizontal stretched reticulated film in which disgusting slits are opened by stretching in a lateral direction.

1 6. The stretched unidirectionally arranged nonwoven fabric is a stretched nonwoven fabric which is arranged in the transverse direction and stretched in a transverse direction, and the tilB-axially oriented network film is formed into a multilayer film stretched in the longitudinal direction. 14. The reinforced stretched fiber according to claim 13, wherein the slit is formed in a longitudinal direction, and the multilayer film is a longitudinally stretched net-like film which is widened in the direction.

1 7. The “unstretched unidirectional alignment failure” is a horizontally stretched nonwoven fabric in which difficulties are arranged and stretched in the lateral direction, and the uniaxially oriented net-like film is formed of the multilayer film in which the slits are formed in the lateral direction. This is a horizontal stretched reticulated film in which the slits are opened by stretching in the horizontal direction. 14. The reinforced stretcher according to claim 13, wherein the reinforced stretcher is laminated on the horizontal stretch in a state.

1 8. At least the laminated surfaces of the liilESW layer and the ΙίίΐΒ The reinforced stretcher according to claim 1, which is configured.