TWI357451B - - Google Patents

Description

1357451 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD OF THE INVENTION The present invention relates to a stretchable nonwoven fabric.

[Prior Art J A variety of non-woven fabrics comprising fibers composed of a polyolefin-based copolymer and having elasticity are known. For example, in JP-A-2003-49352 A, a stretchable nonwoven fabric composed of a fiber containing a propylene-α-olefin random copolymer is disclosed. The propylene-α-olefin random copolymer is obtained by polymerization using a metallocene catalyst, wherein the content of the α-olefin is 2 to 23 mol%. This nonwoven fabric exhibits stretchability by performing heat treatment. That is, the fiber containing the propylene-α-olefin random copolymer is not inherently elastic. Therefore, the stretch characteristics of the nonwoven fabric are not sufficient. In a review of 2003-53 894, it is disclosed that a polyester non-woven fabric is provided on one side of a melt-blown nonwoven fabric comprising a polyolefin-based elastomer composed of an ethylene-〇1-olefin copolymer, and is provided on the other side. a circular braid composed of long fibers of polyethylene terephthalate vinegar, and the laminated body obtained by calendering and bonding, the density of the ethylene_α-olefin copolymer is 〇·9〇g/cm3 Above, the α-olefin content is 8 to 25 mol%. The shrinkage after stretching the laminate is not sufficient. As a stretchable nonwoven fabric using an ethylene-α-olefin copolymer, the applicant has previously proposed a stretchable nonwoven fabric comprising a hard elastic component composed of crystalline polypropylene as an i-th component, and a thermoplastic elastomer. The second component is a core-sheath type stretch elastic composite fiber having a first component as a sheath and a second component as a core, and the thermoplastic elastic system is made of a metallocene catalyst of 116128.doc 9·1357451. .„ The non-woven fabric has good stretchability, and there are fabrics. [Invention] *Extension, (4) More non-woven fabrics. Therefore, the purpose of the present invention is to provide a variety of features represented by stretchability. The stretchable non-woven fabric. The present invention achieves the above object by providing the following stretchable nonwoven fabric:

a substantially inelastic non-elastic fiber layer is disposed on at least one side of the elastic fiber layer; the constituent resin of the elastic fiber contained in the elastic fiber layer contains a polyolefin-based elastomer mainly composed of thinning; the polyolefin-based elastomer The propylene content is 80 to 90% by weight, and the density thereof is 〇855~〇88〇. [Embodiment] Hereinafter, the present invention will be described with reference to the drawings in accordance with preferred embodiments of the invention. Fig. 1 is a schematic view showing a cross-sectional structure in an embodiment of the stretchable nonwoven fabric of the present invention. The stretchable nonwoven fabric 1 of the present embodiment is formed by laminating the same or different substantially inelastic non-elastic fiber layers 2 and 3 on both surfaces of the elastic fiber layer 1. The elastic fiber layer 1 is an aggregate of fibers having elasticity. However, a small amount of inelastic fibers may be contained as long as the elastic elasticity of the elastic fiber layer 1 is not impaired. The constituent resin of the elastic fiber contained in the elastic fiber layer i is used in the present embodiment as a polymer containing a specific polyolefin-based elastomer. The polyolefin-based elastomer is characterized by containing a specific amount of propylene and having a low density. The polyolefin-based elastic system used in the present embodiment is propylene-α, a hydrocarbon copolymer mainly composed of propylene 116128.doc 1357451. The polyolefin-based elastomer has a propylene-producing rate of 80 to 9 〇. 7 m us. , 3 罝 Also, the dense production of olefin 糸 elastomer is 0.855~0.880 gW. The range of the content of propylene in this range is lower than the propylene content of the previously used propylene-based elastomer, and the density is compared with the density of the previously used polypropylene-based elastomer:: low degree. In other words, in the polyolefin-based elastomer used in the present embodiment, the polyene content and the low density of the polyolefin-based elastomer are used as the elastic fibers constituting the resin, and the stretchability of the f-form is used. The stretchability of the non-woven fabric is more inferior than that of the former. In particular, since the (four) hydrocarbon (tetra) body has a low propylene content and a low density, the elastic fiber is less likely to cause breakage during melt spinning, and thus can be easily manufactured. Continuous fibers of small diameter. The elastic fiber can be made into a small diameter, which is advantageous for improving the stretchability. The elastic fiber can be made into a continuous fiber (fine wire) which is also advantageous for improving the stretchability. Moreover, since the polythene niobium elastomer has a low propylene content and a low density, the elastic fiber layer is inelastic, and the flexibility of the elastic fiber itself is high, and the operability of the elastic fiber itself (10) is difficult to bond. Etc.) also became good. Further, it is also possible to suppress fuzzing of the surface of the stretchable nonwoven fabric. Further, the tensile strength of the elastic fiber itself is increased, and the tensile strength of the stretchable nonwoven fabric is also increased. From these viewpoints, if the propylene content of the polyolefin-based elastomer is 8 〇 to 9 〇 by weight, particularly 82 to 88% by weight, the above characteristics further enhance the olefinic hydrocarbon system. The density of the elastomer is set to 0.855 to 〇.88〇g/cm3, especially 0.860 to 0.870 g/cm3, which has the same effect.疋 116128.doc 1357451 The propylene content in the polyolefin elastomer can be determined by the following method. For polyolefin elastomers! 3C_NMR measurement. The weight ratio of propylene to other α-olefin components was calculated from the obtained 1 NMR spectrum. :: The propylene content ratio was determined by converting the weight ratio of propylene to 100%. Further, the density of the polyolefin-based elastomer can be measured in accordance with the c method (floating method) of JIS_K7U2. Further, the environment for measuring the density was 2 generations, 5 2 RH, and the infiltration liquid was ethanol/distilled water. . The polymerization method of the polyolefin-based elastomer is not particularly limited. However, if the ruthenium-based metal catalyst is used as a polymerization catalyst, the obtained polyolefin-based elastomer becomes homogeneous. As the polymerization method in the case of using a metallocene catalyst, the following methods can be used: a slurry method using an inert solvent, a vapor phase method using no solvent, a bulk polymerization method using a monomer as a solvent, and the like. The metallocene catalyst is a metallocene of a compound having a structure in which a transition metal such as titanium, zirconium or hafnium is sandwiched between an unsaturated cyclic compound containing a cyclopentadienyl group or a substituted cyclopentadienyl group of a fluorene electron system. It is combined with a catalyst such as an aluminum compound. Examples of the metallocene include titanocene, zirconium-nitrene, and the like. Examples of the aluminum compound include an alkyl aluminoxane, an alkyl aluminum, a toothed aluminum, and an alkyl aluminum halide. The melt flow rate (MFR) of the polyolefin-based elastomer is 2 to 350 g/10 mm, especially 20 to 200 g/i 〇 min, which makes it more difficult to cause the broken yarn when the elastic fiber is melt-spun, thereby being It is preferable to easily produce a finer diameter of the continuous and shell fibers. MFR can be measured in accordance with ASTM D-1238. Furthermore, the measurement condition is 23 (rc, load 2 l6 116128.doc 1357451 The heat transfer value A of the polyolefin-based elastomer is preferably 2 to 2 〇 (four), particularly preferably 4 to 18 m!/mg 'And dazzling calorific value b is better Μ#

In particular, when the calorific value of each of the melted heat is within the above range of 13 to 22 mJ/mge, the stretchability can be maintained while maintaining the tensile strength, and the melt spinning property is improved. The amount of heat dissipation is determined by differential scanning calorimetry (DSC). The calorific value of heat can be obtained by the following method: - The surface is heated at UTC/min. The DSc curve is obtained, and the amount B of heat in the heat absorption peak displayed at 160 to i65t: can be obtained as follows: One side is heated in steps/minutes. The surface of the DSC curve is obtained from the sum of the heat in the heat absorption peak shown in rc and the heat value A of the melting heat. The olefin may, for example, be a Cx-olefin having 2 or 4 to 碳, and examples thereof include ethylene, oxime-butene, pentene, hongmethyl-1·butene, 1-hexene, and 3-methyl group. Pentene, 4-methyl+pentene, diheptene, 1-octene, decene-decene, i•thracene, dodecene, 丨_fourteen, 丨_十/, ene VIII, twentieth, etc. These α-olefins may be used alone or in combination of two or more. Among the α-olefins, it is particularly preferable to use ethylene 1 butene. Preferably, the α-olefin is used. The polymerization is carried out at a position other than the terminal block (the molecular weight of the terminal block is 5 Å or more). The weight average molecular weight of the polyolefin elastomer is preferably 140'000 to 280, 〇〇 In particular, the elastic fiber contained in the elastic fiber layer 1 may be composed only of the above-mentioned polyolefin-based elastomer as the resin component, or may contain the above-mentioned poly The olefin-based elastomer and other resins are used. When the elastic fiber contains the above-mentioned polyolefin 116128.doc 1357451-based elastomer and other resins, the polyolefin-based elastomer in the elastic fiber is preferably 1 to 99% by weight, particularly preferably 8% by weight. When the elastic fiber contains the above polyolefin-based elastomer and other resins, as the other resin, for example, rubber may be used, or SBS, sis, SEBS may be used. And a thermoplastic elastomer such as a styrene elastomer such as SEPS, a polyester elastomer, or a polyurethane elastomer, or a thermoplastic resin such as a polyacetamide elastomer. These may be used in combination of two or more kinds. Since it has the above-mentioned propylene content rate and density, even if it is melt-spun separately, the spinnability is very good. Therefore, it is not necessary to use other resins in combination to improve the spinnability. The shell J may have a stretchability inherently in the polyolefin elastomer. That is, the elastic fiber contained in the elastic fiber layer 1 is preferably a resin component, and is preferably composed of the above polyolefin elastomer. The fiber form of the elastic fiber may be, for example, a single fiber composed of the above-mentioned poly-smoke-type elastomer alone or a blend of the elastomer and another resin, and (b) the above-mentioned polyolefin-based elastomer. Further, the other resin is a core-sheath type or a parallel type composite fiber constituting the resin. From the above various viewpoints, it is particularly preferable to use a single fiber composed of the above-mentioned polyalkylene-based elastomer alone. It has the property of being stretchable and shrinking when the tensile force is released. The elastic fiber layer 1 is preferably deformed by stretching at least 100% in the direction parallel to the surface and then shrinking, preferably 20% or less, particularly preferably I0% or less. Preferably, the value satisfies at least the MD direction and the CD side I16I28.doc 1357451. The 疋 of the 纡 满足 满足 满足 满足 满足 满足 满足 满足 满足 满足 满足 满足 满足 满足 弹性 弹性 弹性 弹性 弹性 弹性 弹性 弹性 弹性 弹性 弹性 弹性 弹性 弹性 弹性 弹性The forming method of the elastic fiber, Y丨., 埶π你, The melted resin is extruded from the nozzle hole to be thinned by the melt-blown day elongation, thereby making the fiber tree r Μ mechanical stretching machine will be half (four) The state of the tree is carried out by the sPunb〇nd method.特殊w blown) special square md), as a melt-blown method (meu ...,.. in the dazzle spray method combined into the spinning method of spinning method (spinning b丨. wn). Also 'elastic fiber layer The crucible may be obtained in the form of a woven fabric or a non-woven fabric, for example, a fabric web or a non-woven fabric formed by a spinning method = =, etc. Particularly preferred is a fabric web obtained by a spunlace method. The method uses a spinning die in which: in the vicinity of the front end of the nozzle of the molten polymer, the hot air ejecting portion is disposed opposite to the nozzle, and the nozzle is the same. A pair of cold air ejecting portions are provided opposite to the center. If the spun yarn is sprayed by the twisting door, the elongating by the enthalpy and the cold stretching by the cold air can be continuously performed, so that the stretching can be easily performed. The advantage of the formation of the fiber. Moreover, since the fiber does not become too tight and can be formed into a stretchable fiber similar to the size of the cheek-like fiber, it also has the advantage of obtaining a non-woven fabric having high air permeability. The textile method of continuous filaments can be obtained by the spinning and spraying method. Compared with the fabric web of short fibers, the continuous filament fabric web is less likely to be broken at a high elongation and is easy to exhibit elasticity, and thus is extremely advantageous in this embodiment. 116128.doc • 12- 1357451 As a spinning method The spinning die used in the present invention can be, for example, those shown in Fig. 2 of us 5098636A or Fig. J to Fig. 3 of JP 3335949B2. The inelastic fiber layers 2, 3 are extensible but substantially The above-mentioned extensibility may be any of the following cases: the case where the fibers themselves are elongated; and the two fibers which are thermally fused at the joint between the fibers even if the constituent fibers themselves are not elongated. Separated from each other, the heat-melting between the fibers causes a structural change or a fiber breakage of the three-dimensional structure formed by a plurality of fibers or the like, thereby causing the fiber layer to be entirely elongated. As the constituent non-elastic fiber layers 2, 3 Examples of the fiber include fibers composed of polyethylene (polyethylene), polypropylene (poly), polyester (ρΕΤ or ρΒΤ), polydecylamine, etc. The fibers constituting the inelastic fiber layers 2 and 3 may be used. The short fibers may be long fibers, which may be hydrophilic or water repellent. Further, a core-type or side-by-side type composite fiber, a split fiber, a profiled fiber, a crimped fiber, a heat shrinkable fiber, or the like may be used. The fibers may be used singly or in combination of two or more. The non-elastic fiber layers 2, 3 may be a continuous or short-fiber fabric or non-woven fabric to form a large-volume non-elastic fiber having a certain thickness. For the layers 2 and 3, a fabric web of short fibers is preferred. The two non-elastic fiber layers 2, 3' may be the same or different in terms of the material, basis weight, thickness, etc. of the constituent fibers. In the case of a composite fiber, the core is preferably ruthenium, iridium, and the saddle is preferably a low melting point PET, ρρ, ΡΕ. From the use of these conjugated fibers, the heat swell between the constituent fibers of the elastic/dimensional layer containing the (tetra) hydrocarbon-based elastomer is enhanced, and layer peeling is less likely to occur, which is particularly preferable. H6128.doc •13- l^y/451 The thickness of the thick fibrous layer 1 of at least one of the two inelastic fiber layers 2, 3 is particularly good, h5~5: in terms of the bomb, regarding the basis weight Preferably, the elastic fiber layer:: at least one of the basis weight of the inelastic fiber layers 2, 3. In other words, two: the non-elastic fiber layer is also thicker than the elastic fiber layer' and the basis weight is thicker: it forms such a relationship with the basis weight, so the non-elastic fiber layer and the elastic fiber layer

'Become a large volume with a certain thickness. Therefore, the stretchable nonwoven fabric 10 is soft and has a good hand feeling. The thickness of the inelastic fiber layers 2, 3 is preferably from 〜 5 to 5 _, and particularly preferably from 0.1 to 0.5 mm. On the other hand, the thickness of the elastic fiber layer is preferably: it is also smaller than the thickness of the non-elastic fiber layers 2, 3, specifically 0.01 to 2 mm, particularly preferably om mm. The thickness was measured by observing the stretchable nonwoven fabric cross-section at a magnification of 50 to 200 times by a microscope, and the average thickness was obtained in each of the visual fields, and the average thickness of the three visual fields was obtained. The basis weight of the inelastic fiber layers 2, 3 is preferably from 1 to g/m2, particularly preferably from 5 to 15 g/m2, from the viewpoint of uniformly covering the surface of the elastic fiber layer and the residual deformation. . On the other hand, the basis weight of the elastic fiber layer is preferably larger than the basis weight of the inelastic fiber layers 2, 3 from the viewpoint of the stretching property and the residual deformation. Specifically, it is preferably 5 to 8 g/m, particularly preferably 20 to 40 g/m2. The fiber diameter of the constituent fibers of the elastic fibers 1 is preferably 1.2 to 5 times the fiber diameter of at least one of the inelastic fiber layers 2 and 3, which is particularly good. It is 1.2 to 2.5 times. Further, 116128.doc -14- /4^1 In terms of air permeability and stretch characteristics, the fibers of the constituent fibers of the elastic fiber layer 1 are preferably 5 μm or more, particularly preferably 1 inch. It is 100 μϊη or less, and particularly preferably 4〇μπ1 or less. On the other hand, the fiber diameter of the constituent fibers of the inelastic fiber layers 2, 3 is preferably μιη, particularly preferably 1 〇 2 2 μ μηη. Namely, the "constitutive fiber as the inelastic fiber layer 3" is preferably used in comparison with the constituent fibers of the elastic fiber layer 1 to be more 纟田 I,, ', 考. Thereby, the number of constituent fibers of the inelastic fiber layers 2, 3 located on the surface layer is increased. The increase in the melting point can effectively prevent the fuzzing of the stretchable nonwoven fabric 10. Further, the use of fine fibers to obtain a stretchable nonwoven fabric 10 having a good touch is obtained. As shown in Fig. 1, it is preferred that the elastic fiber layer 1 and the inelastic fiber layers 2, 3 are fully fused by the thermal fusion of the fiber nodes in a state in which the constituent fibers of the elastic fiber layer 1 are maintained in a fiber form. Engage. That is, it is preferable that the joint state is different from that of the first stretchable non-woven fabric. On the elastic fiber layer! In the case of full bonding with the inelastic fiber layers 2, 3, 'at the interface between the elastic fiber layer 1 and the inelastic fiber layers 2, 3 and its vicinity, the constituent fibers of the elastic fiber layer 1 and the inelastic fiber layers 2, 3 The nodes constituting the fibers generate a hot material, thereby substantially integrally and uniformly joining the shrinkable nonwoven fabric H) of the present embodiment. By the full joint, (4) the elastic fiber layer m is formed between the inelastic fiber layers 2, 3, and the two layers are separated to form a space. When the boarding is caused between the two layers, the overall feeling of the elastic fiber layer and the inelastic fiber layer disappears, and the feeling of the stretchable non-woven fabric tends to decrease. According to a preferred embodiment of the present invention in which the elastic fiber layer! is fully joined to the non-elastic fiber layers 2, 3, it is possible to provide a multi-layered structure having an integral feel such as 116128.doc -15-1357451. The "constitutive fiber-protected state" of the "elastic fiber is wide" means that the constituent fibers of the layer of the film are hardly deformed into a state in which the elastic fiber is formed even in the case of heating or application of a house force or the like. Since the constituents of the elastic fiber layer 1 are imaginary fiber 胄 film and fiber structure (4) (4)*, the fibers are kept in a fiber-like shape, so that the stretchable nonwoven fabric of the present embodiment is excellent in air permeability. It can be imparted to the layer of the elastic fiber layer, and the fiber is formed in the same layer as the layer of the inelastic fiber layer 2, 3. At least one of the elastic fiber layers 2, 3 which are also produced by the nodes constituting the fiber, which constitutes the state in which the fiber bundle enters the elastic fiber layer 1, and/or the constituent fiber of the elastic fiber layer enters The state of at least one of the inelastic fiber layers 2, 3. The fine fiber layer and the non-elastic fiber layer 2 are promoted to be in such a state, thereby more effectively preventing the generation of hair between the two layers. As a result, the state where the layer and the layer are combined in a shape in which the surfaces of the layers match each other. The constituent fibers of the inelastic fiber layer, a part of which enters the elastic fiber layer 1 and stays there, or passes through the elastic fiber layer 1 to reach the other side of the inelastic fiber layer. In the respective layers, in the macroscopic view of the surface to which the surface fibers are joined, a part of the constituent fibers of the enamel layer enters the thickness direction of the cross section of the layer in the fiber space formed from the surface to the inside of the layer. When the constituent fibers of the inelastic fiber layer enter the elastic fiber layer and remain there, it is preferred that the constituent fibers are interlaced with the constituent fibers of the elastic fiber layer 1. Similarly, in the case where the constituent fibers of the inelastic fiber layer pass through the elastic fiber layer 1 and reach the other inelastic fiber layers, it is preferred that the constituent fibers and other inelastic fiber layers are formed. The fibers are interwoven. When the cross section of the stretchable nonwoven fabric in the thickness direction is observed by an SEM (scanning electron microscope) or a microscope, the space is not substantially formed between the layers. Here, "interlacing" herein means a state in which fibers are sufficiently entangled, and the state in which only the fiber layers are superposed is not included in the interlacing. Whether or not interlacing occurs, for example, can be judged by the following method: in a state in which the fiber layers are superposed separately, the force required to peel off the fiber layer, and the fiber layer are superposed on it, and the air spinning method without heat fusion is applied thereto (air After the penetration, the force of the fiber layer peeling is compared, and when it is confirmed that there is a substantial difference between the two, it can be judged as interlacing. In order to allow the constituent fibers of the inelastic fiber layer to enter the elastic fiber layer and/or to form the constituent fibers of the elastic fiber layer into the inelastic fiber layer, it is preferred that the constituent fibers of the inelastic fiber layer and the elastic fiber layer are formed. At least one of the inelastic fibers or the elastic fibers is in the form of a mesh (unheated state) before the fibers are subjected to the heat fusion treatment. In the viewpoint of constituting the fibers into the other layers, the fibrous layer in the form of a network is preferable because the short fibers have a higher degree of freedom than the long fibers. Further, in order to allow the constituent fibers of the inelastic fiber layer to enter the elastic fiber layer 1, and/or to form the constituent fibers of the elastic fiber layer into the inelastic fiber layer, it is preferred to use an air spinning method. By using the air-spinning method, it is easy to cause the constituent fibers to enter the opposite fibrous layer, and it is easy to cause the constituent fibers to enter the opposite fibrous layer. By using the air-spinning method, one side maintains the volumetric surface of the inelastic fiber layer. The constituent fibers of the elastic fiber layer become easy to enter the elastic fiber layer i 116128.doc 1357451. In the case where the constituent fibers of the inelastic fiber layer are passed through the elastic fiber layer 1 to reach the other side of the inelastic fiber layer, it is also preferred to use the air spinning method. It is particularly preferable to use an air-laid method after laminating a network of inelastic fiber layers and elastic fibers. In this case, heat dissipation occurs between the constituent fibers of the elastic fiber layer. Further, as described in the following suppression method, the gas permeability of the stretchable nonwoven fabric can be improved by the air spinning method under specific conditions and the flow of the hot air, and the air permeability of the elastic fiber T layer is made. The fibers enter more evenly. A method other than the air spinning method, such as a method of blowing water vapor, may also be used. Further, a water needle method, a needle punching method, or the like may be used, but in this case, the volume of the inelastic fiber layer may be lost, or the constituent fibers of the elastic fiber layer may be exposed on the surface, thereby obtaining a stretchable nonwoven fabric. The tendency to feel down. In particular, in the case where the constituent fibers of the non-m fiber layer are interlaced with the elastic fibers, it is preferred that the air is merely interlaced by the air spinning method to: the fibers are interlaced by the air spinning method, and the gas can be blown. The human milk speed, the basis weight or thickness of the fiber layer, and the rapid delivery of the fiber layer are appropriately adjusted. If only the field, (8), and the transport speed of the plant B, .X * are used to manufacture the ordinary air-laid nonwoven fabric. The constituent fibers of the non-elastic fiber layer and the constituent fibers of the elastic fiber are subjected to an air-spinning method under the conditions of layer 1, and 0 is obtained because of the special non-woven fabric. In the air-spinning method, one boat and + ^ secret. 'The thickness of the gas-producing layer of the gas heated to a specific temperature is penetrated. At the same time, the body fiber, @ '时 ' simultaneously produces fiber interlacing with H6l28.doc 1357451 and In the present embodiment, it is not necessary to fuse the fiber nodes between the constituent fibers in the respective layers by the air spinning method. In other words, the air spinning method is to make the constituent fibers of the inelastic fiber layer enter. Elastic fiber: 1. Or make the constituent fiber Interlacing with the constituent fibers of the elastic fiber layer, and then the operations of the constituent fibers of the inelastic fiber layer and the elastic fiber layer are thermally fused. Further, the fiber enters the direction according to the heating gas. The direction and the positional relationship of the inelastic fiber layer and the elastic fiber are changed. The non-elastic fiber layer is preferably an air-laid nonwoven fabric in which the fiber nodes are fused by the air-spinning method, as indicated by the above description. In a preferred embodiment of the stretchable nonwoven fabric of the present embodiment, the elastic fiber layer 1 in a state in which the fibers are kept in a fiber form is contained in the thickness direction of the substantially inelastic non-elastic air-laid nonwoven fabric, thereby forming the gas. a part of the constituent fibers of the spun nonwoven fabric enters the elastic fiber layer 1 and/or a part of the constituent fibers of the elastic fiber layer enters the inelastic fiber layer. In the more preferred form, the air spinning is performed only by the gas: method A part of the constituent fibers of the non-woven fabric is interlaced with the constituent fibers of the elastic fiber layer. The interior of the air-laid nonwoven fabric contains the elastics. The fibrous layer 1 is such that the constituent fibers of the elastic fiber layer i are substantially not present on the surface of the stretchable nonwoven fabric, and it is preferable that the adhesive feeling peculiar to the elastic fiber is not produced. In the stretchable nonwoven fabric 10, as shown in Fig. 1, fine recessed portions are formed in the inelastic fiber layers 2, 3. Thereby, the cross section of the stretchable nonwoven fabric is formed into a wave shape under microscopic conditions. The description of the method is based on the extension processing of the stretchable non-woven fabric, which is produced by H6128.doc 19 1357451. The skin shape is the one which gives the stretchable non-woven fabric 1 to the stretchability, and the feel of the non-woven fabric 10 It does not have a large influence on itself. Although it is not shown in Fig. 1, the stretch nonwoven fabric of the present embodiment can be subjected to embossing, and the flower processing is performed to further increase the elastic fiber layer 1 and the inelastic fiber layer 2. The bonding strength of 3 was carried out for the purpose. Therefore, if the elastic fiber layer ❻ inelastic fiber layers 2, 3 are sufficiently joined by the air spinning method, embossing is not required. Further, the embossing process joins the constituent fibers to each other, but unlike the air-visiting method, the interlacing is not caused by the processing of the flower. The stretchable stretch 1G of the present embodiment has stretchability in at least one direction in the in-plane direction. It can also be stretched in all directions along the plane. In this case, Tian Shiren, because of the different degrees of flexibility, does not have the degree of expansion and contraction of the large telescopic direction. It is better that the weight of the surface is 20~5GG eN/25 _, especially good for 4G. 〜15〇cN/25 The residual deformation from the 100% elongation state to the shrinkage, preferably 疋15°/° or less, particularly preferably 10% or less. The stretchability of the Benbech form is not woven. ^The feel of the fluffing, stretchability, and breathability is good or preventable. It can be used in surgical clothing.

Or π clean film # various uses. The absorbent article such as the A-type diaper is used as a periodical sanitary napkin or discarded as a material. For example, it is possible to form a disposable diaper or the like, and to use (4) a sheet of a thin side flap which is elastically stretchable around the body or at the waist or around the foot. Further, the crucible can be used as a portion for forming the stretchable stretchability of the sanitary napkin or the like. The second/outer portion can also be used to impart a basis weight or thickness to the shrinkable nonwoven fabric, which can be appropriately adjusted according to the specific use of 116128.doc -20- 1357451. For example, in the case of being used as a constituent material of an absorbent article, the basis weight is preferably about 2 〇 16 〇 g/m 2 and the thickness is about 1 1 to 5 mm. Further, in the stretchable nonwoven fabric of the present invention, since the constituent fibers of the elastic fiber layer are maintained in a fiber form, they are soft and breathable. Regarding the flexural rigidity as a softness scale, the flexural rigidity value of the stretchable nonwoven fabric of the present invention is preferably 1 〇 g / 3 〇 _ or less. Regarding the gas permeability, it is preferred that the gas permeability is 16 m/kPa. 3 or more. Further, the elongation is preferably 100% or more.

The flexural rigidity was measured in accordance with JIS L_1096, and the average value of the meandering in the direction perpendicular to the flow direction of the fish was obtained under the condition that the amount of the person using the manual tester was 8 mm and the width of the slit was 1 Gmm. The air permeability is measured by the AUT 〇 MATIC air permea (4) tester KES_F8_AP1 manufactured by KATO TECH, and is counted as the reciprocal. Next, a preferred manufacturing method of the stretchable nonwoven fabric 10 of the present embodiment will be described with reference to Fig. 2 to Fig. 2 . Fig. 2 schematically shows a more (four) apparatus for manufacturing a stretch shirt fabric 1G of the present embodiment. In the apparatus shown in Fig. 2, the upstream side of the upstream side of the self-made process has a fabric web forming portion 100, a hot air treating portion 200, and an extending portion 3 in this order. The fabric web forming portion 100 includes a first web forming device 2, a first object forming device 22, and a third web forming device 23. The i-th fabric forming device 21 and the third web forming device are used. A carding machine is used. The carding machine is not particularly limited, and the same as the usual user of the technical field can be used. On the other hand, the second fabric web is formed into a denture 116128.doc 21 22 ' using a spinning spray method for juvenile correction, a ^ 汸, y 裴. In the spinning spray spinning device, there is a spinning die, which is disposed opposite to the nozzle of the nozzle of the smelting polymer, and has a pair of hot air blasting portions centered on the nozzle; For the above-mentioned nozzle, the spinning die used in the center of the nozzle is the same as the one used in the method. For example, the JP3-m〇08Aq2 T household hall can be used, or the Japanese Taikui 丨 & Japanese Patent No. 333S949 Figure] to the figure shown in Figure 3. The hot air treatment unit 200 is provided with a hot air furnace 24. In the hot blast stove, the heating gas is heated to the temperature of the wire, and the heating air is produced. The three layers of fabric mesh that overlap each other are introduced into the hot blast stove on the right side, and the gas is applied from below the fabric web, or in the opposite direction, or to both sides: forced through. The extension σ is equipped with a weak engagement device 25 and an extension device 30. The weak joint device 25 is equipped with a pair of embossing rolls m. The weak joining device 25 is for causing the respective fabrics in the fiber sheets formed by the hot air treating portion 2 (8) to reliably produce a joint. Downstream of the weak joint device, there is a (4) device H-stretching device 3Q disposed adjacent to (4), and the large-diameter portions 31, 32 and the small-diameter portion (not shown) are alternately formed along the axial direction and can be engaged with each other. - Pair of embossing rolls 33, 34. Between the two embossing rolls 33, 34, the direction in the axial direction of the fiber sheet & roll (i.e., the width direction of the sheet) is extended by biting the fiber sheet W. In the method of manufacturing a stretchable nonwoven fabric using the above-described apparatus, first, a pair of fabric webs composed of the same or different inelastic fibers are provided on each side of the fabric web composed of elastic fibers. 116128.doc •22· The so-called “web composed of elastic aggregate fibers” is not a fabric net composed only of elastic fibers, and is not damaged. The elastic fiber layer formed by the field fabric web (the layer shown in the symbol 1 of Fig. 1 and the layer of the surface) has a stretch fabric having a small amount of inelastic fibers in addition to the fibers. In the fabric web forming portion 100, a non-elastic short fiber is used as a raw material to manufacture a non-peripheral fibrous web 3 by a first web forming device 21 (ie, a carding machine), and it is oriented in one direction. Continuous delivery. Using the elastic resin composed of the hot 1 plastomer as a raw material, the fibers spun by the second fabric web, the forming device 22 (that is, the spun spinning spun) are stacked on a conveyor composed of the trap. Thereby, an elastic fiber fabric web composed of continuous filaments of elastic fibers is produced, which is peeled off from the conveyor and laminated; and the inelastic fiber fabric continuously conveyed in one direction by the first fabric web forming device 21 is formed. Net 3, on. On the elastic fiber web, a non-elastic fiber web 2 made of a third fabric forming device 23 (i.e., a carding machine) is laminated. When the spunlace method is used for the formation of the elastic fiber web 1, the elongation of the hot fibers by the hot air and the cold stretching by the cold air can be continuously performed. Therefore, the stretch fabric can be easily formed. Further, since the fibers are not too dense, the stretchable fibers having a short fiber size can be formed, and therefore, the nonwoven fabric having high air permeability can be obtained. Further, if the spinning method is used, a continuous filament fabric web can be obtained. The continuous filament fabric web is more advantageous in the present embodiment than the fabric web of the short fiber, which is hard to be broken at a high elongation and is easy to exhibit elasticity. 116I28.doc • 23- 1357451 The laminated body of the three fabric nets is fed into a hot-blast stove 24 of an air-spinning type where hot air treatment is carried out. By hot air treatment, the nodes between the fibers are thermally fused and the elastic fiber webs are joined to the inelastic webs 2', 3' throughout their faces. In the case of hot air treatment, it is preferred not to mesh the layers of the fabric. Therefore, after the hot air treatment, each of the fabric webs is maintained and has a large volume and a certain thickness, so that a stretchable nonwoven fabric having a good hand feel is obtained.

Preferably, the hot-air treatment causes the nodes between the fiber groups to be kneaded, so that the layers of the fabric web are fully joined, and the non-elastic fiber web 2 located on the hot air blowing side is mainly composed of the I fibers. - Partial entry into the elastic web l't. X, preferably, by controlling the conditions of the hot air treatment, the non-elastic fiber web 2, which is a part of the constituent fibers, is introduced into the elastic fiber fabric mesh, thereby interlacing with the constituent fibers of the fabric mesh. Alternatively, it is preferred that the non-elastic fiber web 2, a part of the constituent fibers penetrate the elastic fiber fabric net until it reaches the inelastic fiber web 3, and interlaces with the constituent fibers of the fabric web 3' . Preferably, a portion of the constituent fibers of the inelastic fiber web 2 is introduced into the elastic web 1, and/or the elastic web is entangled, and a portion of the constituent fibers enter the inelastic web 2, preferably. Yes, the amount of hot air is 〇.4~3 m/#, and the temperature is 8〇~16〇. 〇, conveying speed is 5~2〇〇... The heat treatment time is 〇.5~10 seconds. The amount of hot air is particularly good at 1 to 2 m/sec. The above conditions are also preferable in terms of softening the fibers to make them uniformly enter and melting the fibers. Further, in order to cause the fibers to be interlaced, the hot air volume can be set to 3 to 5 m/sec, and the blowing air pressure can be set to 〇.丨~〇.3 kg/cm2. 116I28.doc -24- 1357451 If the elastic fabric web has a gas permeability of 8 m/kPa·s or more, particularly preferably 24 m/kPa·s or more, the passage of hot air is improved, so that the fiber can be made Enter more evenly. Further, the fiber fusion system is good and the maximum strength is increased. In addition, it can also prevent fuzzing. In the hot air treatment, it is preferred that, together with the non-elastic fiber fabric net 2, a part of the constituent fibers enter the elastic fiber mesh factory, the non-elastic fiber fabric net 2' constituent fibers and/or the inelastic fiber fabric net 3, the constituent fibers, and the elastic fiber fabric net i, the constituent fibers, which are thermally fused at the nodes thereof. In this case, it is preferred that the hot air treatment is carried out under the condition that the elastic fiber after the hot air treatment maintains the fiber form. That is, it is preferred that the elastic fiber fabric is not meshed by hot air treatment, and the constituent fibers are formed into a thin or thin film-fiber structure. Then, in the hot air treatment, the constituent fibers of the inelastic fiber web 2' are thermally fused at the joints, and similarly, the elastic fiber fabric nets are formed between the fiber groups and the inelastic fiber web 3'. Thermal fusion occurs at the nodes between the constituent fibers. By the hot air treatment by the air spinning method, the fiber sheet 10B in which three fabric webs are integrated can be obtained. The fiber sheet 10B is a long strip having a certain width and extending in one direction. Then, the fiber sheet 1〇B is conveyed to the extension portion 300. The fiber sheet 1〇B is first conveyed to the weak σ device 25 in the extension 3〇〇. The weak joining device 25 is composed of a metal embossing roll 26 on which the outer peripheral surface is regularly provided with a convex portion for a fortune, and an embossing device equipped with a metal or resin receiving roll 27 disposed opposite thereto. The hot embossing process is performed in the fiber sheet 10 by the weak bonding device 25. Thereby, the fiber sheet subjected to the embossing process is obtained. Furthermore, the heat embossing process is performed by using the weak connection I16128.doc • 25· 1357451 and the device 25, and the hot air processing unit 200 performs heat fusion, thereby bonding the woven monuments and the weeks of each layer to each other. Therefore, it is not necessary for the present invention to use the weak bonding device 25 to perform the squeezing process. In order to realize the joining of the nets of the layers, the use of the weak joint device in the form of the weak joint device has a effective method. Further, if the weak joining device 25 is used, in addition to the joint integration of the fabric webs of the respective layers, there is an advantage of suppressing the fiber sheets and raising. As a method of weakly joining the fiber sheets,

In addition to the heating embossing, ultrasonic bonding, calender bonding using a flat roll, and steam jet bonding are also mentioned. The hot embossing using the weak joining device 25 is auxiliary to the heating and melting by the hot air treating portion, and therefore the processing conditions are preferably smooth. On the contrary, if the conditions of the hot dust processing are too strict, the volume of the fiber sheet 1GA will be damaged, and the film thickness of the (4) dimension will be introduced, thereby adversely affecting the hand feeling or the gas permeability of the finally obtained stretch nonwoven fabric. . From this point of view, the line pressure of the hot embossing process and the heating temperature of the embossing are set. The fiber sheet 1A obtained by the hot embossing process is formed in a regular arrangement pattern having a plurality of independent scatter-like joint portions 4 as shown in Fig. 3 . The joint portion 4' is preferably formed discontinuously in both the flow direction (MD) of the fiber sheet and the direction perpendicular thereto (CD). In the weak joining device 25, the fiber sheet l〇A which has been subjected to hot embossing is continuously conveyed to the stretching device 30. As shown in FIG. 2 and FIG. 4, the pair of concave-convex rollers 33, 34 formed by the large-diameter portions 3i, 32 and the small-diameter portions (not shown) are formed along the axial length of the intersection 116168.doc -26 - 1357451. The extension device 3A extends the fiber sheet 1A in a direction perpendicular to the transport direction (CD).

The L-stretching device 3G is configured such that the pivotal portion of the embossing rollers 33 and 34 of the side or the side is vertically displaced by the known lifting/lowering, so that the distance between the roller and the 34 can be adjusted as shown in FIG. 2 and FIG. 4(b) and (4), each of the concavo-convex ridges 33' 34' can be inserted into the large-diameter portion η of the concavities and convexities (four) with a margin to be inserted into the concavities and convexities of the other side - the large-diameter portion 32 and the other side of the concavo-convex roller The direct-working portion 32 has a margin to insert a person--the large-diameter portion 3 of the side of the embossing roller 33. The combination of the large-diameter portions 3 of the embossing roller 33. The fiber sheet 1A is engaged with the two sides of the state to extend the fiber sheet 10A. In the extending step, as shown in Figs. 3 and 4, the position of the joint portion 4 and the position of the large diameter portions 31, 32 of the uneven roller and μ are maintained in the width direction of the fiber sheet 10A. Specifically, as shown in FIG. 10 (f), in the fiber sheet 1A, a plurality of joint portions formed by a plurality of joints 4 4 in series and linearly arranged in the direction of the hall are formed (shown in FIG. 3). In the case of FIG. 3, a joint portion column Ri from the leftmost joint portion I is represented, and a joint portion Ri is provided from here. The joint portion 4 included in each of the joint portions 4 is held at the position of the large diameter portion 31 of the one side of the uneven roller 33, and is represented by a second joint portion column & The joint portion included in each of the row R2 is aligned with the position of the large diameter portion 32 of the other uneven roller 34. In Fig. 3, the range indicated by reference numerals 31 and 32 is shown in the fiber sheet 1. 〇A bite into the range between the two bumps, the state of the 3, 3, and 4, and the range of the large diameter portion 3 1 , 32 of each newspaper overlaps. I16128.doc -27- : fiber flakes 10A bites into between the embossing rolls 33, 34, when the crepe 〇A passes between the two views 33, 34, as shown in Figs. 及) and (4), the joint portion 4 and the large diameter portion 31 of the plurality of embossing rolls 32 overlaps, the other is in the area between the large diameter portions where the large direct control portions 31, 32 do not overlap, that is, 'the area between the joint portion rows R is actively extended in the width direction, so the surface can be Preventing breakage of the joint portion 4 or peeling of the layers of the fabric web: ' One side effectively extends the portion of the blade other than the joint portion of the fiber sheet 10A By the extension, the inelastic fiber layers 2, 3 are sufficiently elongated, whereby the inelastic fiber layers 2, 3 can be greatly reduced to hinder the flexibility of the elastic fiber layer to be freely stretched and contracted. In addition, it is possible to produce a stretchable nonwoven fabric which is excellent in appearance and has a good appearance, and which is damaged or has a small amount of fluffing. In order not to damage the fiber sheet 10A, the outer peripheral surfaces of the large diameter portions 31 and 32 of the uneven rollers 33 and 34 are not For example, it is preferable to have a flat surface having a specific width as shown in Figs. 4(b) and 4(d). The width of the front end surface of the large diameter portions η and 32 is ~ [refer to Fig. 4(b) It is preferable that 〇3 to 1 _, and it is preferable that the size of the joint portion 4 in the CD direction is 7 to 2 times, particularly preferably 0.9 to 1.3 times. Thereby, it is difficult to break the fiber form of the inelastic fiber, thereby obtaining a high-strength stretch nonwoven fabric. The distance P between the large diameter portions is referred to as Fig. 4(b), preferably 0.7 to 2 5 mm. The pitch P is preferably 2 to 5 times, more preferably 2 to 3 times the size of the joint portion 4 in the CD direction. Thereby, the appearance of the swatch can be exhibited, and a stretchable nonwoven fabric having a good touch can be obtained. Further, in order to maintain the positional relationship, the distance between the joint portions 4 in the CD direction is substantially between the large diameter portions I16128.doc • 28-1357451 is 2 times from P', but due to the fiber sheet 1〇A along the cd The direction is elongated or indented, so if it is within the range of 1-6 times to 2.4 times, the position can be kept the same. With respect to the fiber sheet 10Α fed out from the stretching device 30, the extended state in the width direction thereof can be released. That is, the elongation is alleviated. As a result, the fiber sheet 10 表现 exhibits stretchability, and the sheet 1 收缩 can be contracted in the width direction thereof. Thereby, the stretchable non-woven fabric 1 作为 ^ is obtained, and when the extended state is released, the extended state can be completely released; or

The extension state can be released in a state where the extended state is maintained to a certain extent within the limit of the performance of the stretchability.

The present invention is not limited to the above embodiment. For example, the stretchable nonwoven fabric 10 of the above embodiment is formed by laminating the same or different substantially inelastic inelastic fiber layers 2, 3 on both sides of the elastic fiber layer, but may alternatively be elastic. A form of a two-layer structure in which a non-elastic fiber layer is laminated on the _ surface of the fiber layer. When a stretchable nonwoven fabric having a two-layer structure is used as a constituent material of the absorbent article, particularly when it is used in contact with the skin of the user, the non-elastic fiber layer is used to face the skin side of the wearer. Therefore, it is preferable that the touch is good or the adhesion is prevented from the viewpoint of adhesion, and the mountain shell layers 2 and 3 are integrally joined, and the elastic fiber layer 1 and the non-elastic layer 2 may be used. Partial bonding is performed. As a method of joining the elastic fiber layer two-dimensional layer 2 and the chemical conversion portion, for example, the sound wave embossing, the use of the pattern-shaped water permeable net, and the tearing one can be performed. Knife water needle method, #用讯 A part of the needle-shaped method of the pattern-like needle, part ^ ',, Ling special. The elastic fiber layer 1 and the inelastic fiber layers 2, 3 may be intermittently or band-joined in an arbitrary pattern by the method of: I16I28.doc -29- 1357451. One of the two fiber layers that are partially joined has a lower body feel or joint strength than the full joint. However, by partial joining, the inelastic fiber layers 2, 3 are partially floated from the elastic fiber layer, so that a stretchable nonwoven fabric having a three-dimensional feeling and a certain thickness can be obtained. Further, in the method shown in Fig. 4, the large diameter portion of the uneven roller which is not on one side and the small diameter portion of the uneven roller on the other side can be lost to the fiber sheet 1a.

The extension is carried out in the state, but the interval between the two may be narrowed, and the fiber sheet 10A may be stretched while sandwiching the fiber sheet 10A therebetween. That is, it is also possible to extend in a state in which the fiber sheet is adhered to the bottom portion as a medium. Further, the extending step may be performed by the method β disclosed in Japanese Laid-Open Patent Publication No. Hei 6-133998. In the above manufacturing method, the fiber sheet 1〇Α may be extended in the CD direction. extend.

Hereinafter, the present invention will be described in more detail by way of examples. However, the scope of the invention is not limited to the embodiment. [Example 1] Using the apparatus shown in Fig. 2, a stretchable nonwoven fabric as shown in Fig. 2 was produced. First, the short fibers (core··PET, Lai E) with a diameter of 2 1 7 and a length of 5 1 mm are supplied, and 1 combing to form a non-elastic fiber fabric net composed of a carded fabric net 3 Hey. The entanglement of j, the basis weight of η with 3 is 〇 g / m2. An elastic fiber web 1' is laminated to the inelastic web. The elastic fiber woven fabric is formed as an elastic resin according to the following method, and a polyolefin-based elastomer having a polypropylene content of R 甚f 、f ° and an ethylene content of another α-olefin of 116128.doc 1357451 b% by weight is used. . The polyolefin-based elastomer is obtained by polymerizing a metallocene catalyst. The molten resin was extruded from the spinning nozzle at a die temperature of 230 ° C using an extruder, and the elastic fiber fabric was formed into a mesh on the fabric web by a spinning spray method. The diameter of the elastic fiber is Μ μπι. The fabric factory has a basis weight of 4〇 g/m2. An inelastic fiber web 2 composed of the same short fibers as described above is laminated on the elastic web 1. The fabric net 2 has a basis weight of i〇.

The three-layered textile web laminate was introduced into a heat treatment machine and subjected to a hot air heat treatment in an air-spinning manner. The heat treatment conditions are: temperature on the fabric web 14 〇 \, hot air volume 2 m / sec, blowing pressure 〇 1 kg / cm 2 , blowing time _ seconds. By this heat treatment, the fiber sheet 10B in which the three-layer fabric web is integrated is obtained. The fiber sheet is then subjected to hot embossing. The hot embossing process is carried out using an embossing device equipped with an embossing convex and a flat metal roll. As the embossed bullet, a point-like convex roll having a plurality of convex portions having a CD direction pitch of 2· is used. The temperature of each roller was set to (10). By this heating waste flower processing', a fiber sheet i〇a having a regular pattern of joint portions is obtained. The fiber sheet 10A is subjected to elongation processing. The extension processing is performed by using a vibrating body with a large straight portion and a small diameter portion outside the red and +丄- and only. The extension of the pair of embossing rolls formed by the interaction of the shaft lengths is performed. The distance between the big acre and the small diameter is 2.0 mm. The fiber sheet 10A is extended in the CD direction by the extension/expansion process by the Nano. In this way, get y P pi 士 & +, . A woven fabric having a basis weight of 6 〇 g/m 2 which is stretched in the CD direction. Furthermore, the rounding speed in each step of the owing is 10 m/min. [Examples 2 to 6] II6l28.doc 1357451 Examples 2 to 6 were carried out in the same manner as in Example i. The basis weight of the elastic resin and the elastic fiber fabric net used is as shown by h. Elastic resin is a polymer obtained by polymerization using a metallocene catalyst. The strength at 5 〇% elongation is approximately proportional to the basis weight of the elastic fibers, but in Examples 2, 4, and $, the strength at 50% elongation is higher relative to the basis weight. The stretchable nonwoven fabric obtained in Examples 2 to 6 has the structure shown in Fig. 2 . [Comparative Example 1]

An SEBS resin having a styrene content of 20%, a weight average molecular weight of 5 Å, and an MFR of 15 was used as the elastic resin. Using this elastic resin, an elastic fiber web was formed at a die temperature of 3HTC. The elastic fiber has a diameter of 32 μΐη. Except for the above, a stretchable nonwoven fabric was produced in the same manner as in Example 》 [Evaluation] The properties of the stretchable nonwoven fabric obtained in the examples and the comparative examples are disclosed in Table 1 below. The measurement methods for each item in the table are as follows. <Strength, Elongation, and Residual Deformation> mm, a rectangular test piece of 25 mm in size was cut at an angle of 5 切 in a direction perpendicular to the stretchable non-woven fabric. The test piece was placed on a Tensil(R) RTC121(R) A manufactured by Orientec. The chuck spacing is h mm. The test piece was stretched at a speed of 3 ounces of melon in the direction in which the nonwoven fabric was stretched, and the load at this time was measured. When the load at the maximum point at this time is taken as the maximum intensity, the length of the test piece at this time is taken as B, and the length of the original test piece is taken as A, and {(Β·Α)/Α}χ1〇〇 is taken as the maximum elongation. (8)). Further, a 100% elongation cycle test was carried out, and the strength at the time of elongation of 116128.doc 32·1357451 100% was obtained from the load at the time of elongation of 1%. Further, the ratio of the length which cannot be recovered when returning to the origin at the same speed immediately after the elongation of % is measured as the residual deformation. Into *, the strength at which the strength was restored to 50% after 100% elongation was obtained, and this value was taken as the strength at 50% elongation. The technique of strength at 50% elongation is as follows. When the diaper is worn as follows, the peripheral portion of the diaper is usually stretched to 100%, and then it is shrunk to wear the diaper in a state of about 5 ()% elongation. In view of the fact that the stretchable nonwoven fabric of the present invention is used for the peripheral portion of the body of the diaper, the strong diaper at 50% elongation is more difficult to fall off. (<Adhesiveness of elastic fiber layer and non-elastic fiber layer>> 歹: Standard judgment is made between the hand-incorporated fiber layer and the inelastic fiber layer == state, single peeling ~ slight resistance : △, the 曰 is not peeled off and some remains in the other layer. It is peeled off and remains in the other layer: ◎. It is judged by 3 people. If the above is the same opinion, the opinion is the result of judgment. The intermediate opinion is used as the judgment result. ',,, not H6128.doc -33- 1357451

116128.doc Comparative Example 1 〇〇〇〇Ο Ο r. Ο 〇rH 230 12.0 1 O CN m 〇 Example 6 00 00 0.871 300 300,000 00 τ—Η 205 CN 00 〇00 10.5 O ◎ Example 5 00 00 0.861 CN wS m oo 260,000 jn 225 in OO tn ◎ Example 4 Os 00 0.863 rH Ό CN 240,000 丨 215 s 13.0 〇rH 卜τ—« ◎ Example 3 0.865 Os Os Bu ο Ο o' (Ν CN 〇250 235 ma\ 18.0 o 1—^ ◎ Example 2 0.866 卜 Ο ο 〇Λ 〇Λ CN 〇 230 285 1 19.5 ψ 〆iH ◎ Example 1 m 00 0.867 o- CN CN 300 200,000 〇250 230 94.5 17.0 o ◎ Propylene content (% by weight) c^T- S § $ Refining calorific value A (mJ/mg) Melting calorific value B (mJ/mg) MFR (g/10min) Weight average molecular weight Elastic fiber basis weight (g/m2) Maximum Strength (cN/25 mm) Maximum strength (%) Strength at 100% elongation (cN/25 mm) 娥?? e -ft- ^ 2 s δ Residual deformation (%) Fiber diameter of elastic fiber (μιη) Inelastic The bond between the fiber and the elastic fiber is shouted, and the acyl plough is taken. MK·馥相· -34- (3) 7451 The results shown in Table 1 can be used for each and every end of the town, The maximum extension and remnant of the non-woven fabric of the & (4) is maintained at the maximum elongation of the (4) maximum elongation of the comparative example, and the A-cloth is of the same degree of higher water and has a non-woven fabric of the comparative example. Also! _ Oh, the strength, and can be judged! The non-woven fabric of the joint of the raw fiber layer and the non-elastic fiber layer is good, and the diaper has the same characteristics as the disposable crepe. Bu Techeng. The touch is soft and the air permeability is higher. It is like wearing, and the whole kidney is easy to remove. Therefore, it is easy to wear and tighten, so it is difficult to leave rubber marks.

[Industrial Applicability] Non-woven fabrics are compared. Further, as a result of the polyolefin, it is difficult to cause interlayer peeling of the elastic fibers. The stretchable nonwoven fabric of the present invention and the first "(4) have higher stretch characteristics. Further, the tensile strength becomes large, and the fusion property between the elastomer and the inelastic fiber layer becomes high. The bonding between the layer and the inelastic fiber layer becomes good, from 0 [simple description of the figure] Figure! A schematic view showing a cross-sectional structure of an embodiment of the stretchable nonwoven fabric of the present invention. Fig. 2 is a schematic view showing a preferred apparatus used in the manufacture of the stretchable nonwoven fabric shown in Fig. 2. ~ Fig. 3 is a plan view showing an example of a fiber sheet which is subjected to elongation processing. 4(a) is a cross-sectional view of the fiber sheet shown in FIG. 3 along the line a_a in the cd direction, and FIG. 4(b) corresponds to a state in which deformation occurs between the uneven rolls in FIG. 4(a) (extended state). FIG. 4(c) is a cross-sectional view of the fiber sheet shown in FIG. 3 along the line in the CD direction, and FIG. 4(d) is a graph corresponding to the state in which the uneven roll is deformed (the state in which the stretch is obtained). Section 4(c). 116128.doc •35- 1357451

[Description of main component symbols] 10 10A, 10B 1 ' 1' 2 , 2' , 3 , 3' 4 R1 , ruler 2 100 200 300 21 , 23 22 24 25 26 > 27

30, 30A 31, 32 33 , 34 , 35 , 36 37 WP stretchable non-woven fiber sheet elastic fiber layer inelastic fiber layer joint joint part row fabric net forming part hot air processing part extension carding machine spinning jet spinning head hot air Furnace weak joint device embossing roller extension device large diameter portion uneven roller tension adjusting roller group large diameter portion top surface width large diameter portion between -36- 116128.doc

Claims (1)

X. Patent application scope: 1. A stretchable non-woven fabric, JL towel is provided on the dish μ, and at least one side of the elastic fiber layer is provided with a substantially inelastic non-elastic corpse r-fibrous fiber layer. The constitutive resin containing elastic fibers is a polyolefin-based elastomer containing propylene as the main component. 'The polyolefin-based elastic 舻 工 & a a a f f f f f f f f f 丙烯 丙烯 丙烯 丙烯 丙烯 丙烯 丙烯 丙烯 丙烯 丙烯 丙烯 丙烯 丙烯 丙烯 丙烯 丙烯 丙烯 丙烯 丙烯 丙烯%, density is 0.855~0.880 g/cm3. 2. The stretchability 请求% ^ fiber cloth of claim 1, wherein the polyolefin-based elastic system is polymerized using a metallocene catalyst, β 3 · the stretchable nonwoven fabric of claim (4), wherein the polyolefin-based elastic The melting heat value of the body is 2~2〇mJ/mg, and the heat value of melting is 〜12~24 mj/mg. The stretchable nonwoven fabric according to claim 1 or 2, wherein the polyolefin-based elastomer has a melt flow rate (MFR) of from 2 to 350 g/1 〇 min. 5. The stretchable nonwoven fabric of claim i or 2, wherein the constituent resin is composed of the polyolefin elastomer. 6. The stretchable non-woven fabric of claim 1 or 2, wherein the elastic fiber layer and the non-ballistic fiber layer are integrally joined by heat fusion of the fiber nodes in a state in which the constituent fibers of the elastic fiber layer maintain the fiber form. And a state in which a part of the constituent fibers of the inelastic fiber layer enters the elastic fiber layer, and/or a part of the constituent fibers of the elastic fiber layer enters the inelastic fiber layer. 116128.doc